chore: fix Dockerfile warning

This reverts commit eddbeec7ef.

.dockerignore

@@ -0,0 +1,7 @@
+target/
+files/
+README.md
+screenshot.png
+Dockerfile
+.dockerignore
+

.gitignore

@@ -1,2 +1,6 @@
 /target
 /files
+/static/index.html
+/static/auth-hide.js
+/.cargo
+docker-push.sh

Cargo.toml

@@ -1,25 +1,42 @@
 [package]
 name = "datatrash"
-version = "0.1.0"
+version = "2.5.1"
 authors = ["neri"]
-edition = "2018"
+edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-actix-web = { version = "2.0.0", default-features = false, features = [] }
-sqlx = { version = "0.3.5", default-features = false, features = [ "runtime-async-std", "postgres", "chrono" ] }
-actix-rt = "1.1.1"
-env_logger = "0.7.1"
-log = "0.4.8"
-actix-files = "0.2.2"
-async-std = "1.6.2"
-actix-multipart = "0.2.0"
-futures = "0.3.5"
-rand = "0.7.3"
-chrono = "0.4.13"
-openssl-sys = "*"
+actix-web = { version = "4.3.0", default-features = false, features = [
+  "macros",
+  "compress-gzip",
+  "compress-zstd",
+] }
+sqlx = { version = "0.8.2", default-features = false, features = [
+  "runtime-tokio-rustls",
+  "postgres",
+  "time",
+] }
+env_logger = { version = "0.11.3", default-features = false, features = [
+  "humantime",
+] }
+log = "0.4.17"
+actix-files = "0.6.2"
+tokio = { version = "1.25.0", features = ["rt-multi-thread", "macros", "sync"] }
+actix-multipart = "0.7.0"
+futures-util = "0.3.26"
+rand = "0.8.5"
+time = "0.3.17"
 htmlescape = "0.3.1"
+urlencoding = "2.1.2"
+tree_magic_mini = { version = "3.0.3", features = ["with-gpl-data"] }
+tree_magic_db = "*"
+mime = "0.3.16"
+url = "2.3.1"
+actix-governor = "0.6.0"
+lazy_static = "1.4.0"
 
-[features]
-vendored = ["openssl-sys/vendored"]
+[profile.release]
+strip = "symbols"
+lto = true
+codegen-units = 1

Dockerfile

@@ -1,26 +1,30 @@
-FROM ekidd/rust-musl-builder as build
+FROM rust:alpine AS builder
 
-USER rust
-WORKDIR /home/rust/src/
-RUN USER=rust cargo new datatrash
+WORKDIR /app
+RUN apk add musl-dev
 
-WORKDIR /home/rust/src/datatrash
-COPY --chown=rust Cargo.toml Cargo.lock ./
-RUN cargo build --release --features vendored
+RUN cargo init
+COPY Cargo.toml Cargo.lock ./
+RUN cargo build --release --target=x86_64-unknown-linux-musl
 
-COPY --chown=rust src ./src
-COPY --chown=rust static ./static
-COPY --chown=rust template ./template
-COPY --chown=rust init-db.sql ./init-db.sql
+COPY src ./src
+COPY static ./static
+COPY template ./template
+COPY snippet ./snippet
+COPY init-db.sql ./init-db.sql
+COPY mime.types ./mime.types
 RUN touch src/main.rs
-RUN cargo install --path . --features vendored
+RUN cargo build --release --target=x86_64-unknown-linux-musl
+RUN strip /app/target/x86_64-unknown-linux-musl/release/datatrash
+
+
 
 FROM alpine
 
-ENV RUST_BACKTRACE   "1"
-
-COPY --from=build /home/rust/.cargo/bin/datatrash .
+WORKDIR /opt/datatrash
+COPY --from=builder /app/target/x86_64-unknown-linux-musl/release/datatrash ./
 COPY static ./static
 RUN mkdir ./files
+
 EXPOSE 8000
-ENTRYPOINT ["./datatrash"]
+ENTRYPOINT ["/opt/datatrash/datatrash"]

LICENSE

@@ -0,0 +1,661 @@
+                    GNU AFFERO GENERAL PUBLIC LICENSE
+                       Version 3, 19 November 2007
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+or convey a specific copy of the covered work, then the patent license
+you grant is automatically extended to all recipients of the covered
+work and works based on it.
+
+  A patent license is "discriminatory" if it does not include within
+the scope of its coverage, prohibits the exercise of, or is
+conditioned on the non-exercise of one or more of the rights that are
+specifically granted under this License.  You may not convey a covered
+work if you are a party to an arrangement with a third party that is
+in the business of distributing software, under which you make payment
+to the third party based on the extent of your activity of conveying
+the work, and under which the third party grants, to any of the
+parties who would receive the covered work from you, a discriminatory
+patent license (a) in connection with copies of the covered work
+conveyed by you (or copies made from those copies), or (b) primarily
+for and in connection with specific products or compilations that
+contain the covered work, unless you entered into that arrangement,
+or that patent license was granted, prior to 28 March 2007.
+
+  Nothing in this License shall be construed as excluding or limiting
+any implied license or other defenses to infringement that may
+otherwise be available to you under applicable patent law.
+
+  12. No Surrender of Others' Freedom.
+
+  If conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License.  If you cannot convey a
+covered work so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you may
+not convey it at all.  For example, if you agree to terms that obligate you
+to collect a royalty for further conveying from those to whom you convey
+the Program, the only way you could satisfy both those terms and this
+License would be to refrain entirely from conveying the Program.
+
+  13. Remote Network Interaction; Use with the GNU General Public License.
+
+  Notwithstanding any other provision of this License, if you modify the
+Program, your modified version must prominently offer all users
+interacting with it remotely through a computer network (if your version
+supports such interaction) an opportunity to receive the Corresponding
+Source of your version by providing access to the Corresponding Source
+from a network server at no charge, through some standard or customary
+means of facilitating copying of software.  This Corresponding Source
+shall include the Corresponding Source for any work covered by version 3
+of the GNU General Public License that is incorporated pursuant to the
+following paragraph.
+
+  Notwithstanding any other provision of this License, you have
+permission to link or combine any covered work with a work licensed
+under version 3 of the GNU General Public License into a single
+combined work, and to convey the resulting work.  The terms of this
+License will continue to apply to the part which is the covered work,
+but the work with which it is combined will remain governed by version
+3 of the GNU General Public License.
+
+  14. Revised Versions of this License.
+
+  The Free Software Foundation may publish revised and/or new versions of
+the GNU Affero General Public License from time to time.  Such new versions
+will be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+  Each version is given a distinguishing version number.  If the
+Program specifies that a certain numbered version of the GNU Affero General
+Public License "or any later version" applies to it, you have the
+option of following the terms and conditions either of that numbered
+version or of any later version published by the Free Software
+Foundation.  If the Program does not specify a version number of the
+GNU Affero General Public License, you may choose any version ever published
+by the Free Software Foundation.
+
+  If the Program specifies that a proxy can decide which future
+versions of the GNU Affero General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
+  Later license versions may give you additional or different
+permissions.  However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+  15. Disclaimer of Warranty.
+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If your software can interact with users remotely through a computer
+network, you should also make sure that it provides a way for users to
+get its source.  For example, if your program is a web application, its
+interface could display a "Source" link that leads users to an archive
+of the code.  There are many ways you could offer source, and different
+solutions will be better for different programs; see section 13 for the
+specific requirements.
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU AGPL, see
+<https://www.gnu.org/licenses/>.

README.md

@@ -2,7 +2,60 @@
 
 A file and text uploading service with configurable time limit
 
-![Application screenshot](./screenshot.png)
+![Application screenshot showing the web form for file or text upload](./screenshot.png)
+
+## running
+
+For running on docker, use the provided `docker-compose.yml.sample` and adapt it to your needs.
+To run the software directly, use the compiling instructions below.
+
+## config
+
+- The `static` files directory needs to be next to the binary.
+- The `static` directory – sadly – needs to be writable
+  - On startup the `index.html` will be generated based on the config
+- The maximum filename length is 255
+
+### General configuration
+
+| environment variable         | default value  | description                                    |
+| ---------------------------- | -------------- | ---------------------------------------------- |
+| STATIC_DIR                   | ./static       | directory to generate "static" files into      |
+| FILES_DIR                    | ./files        | directory to save uploaded files into          |
+| UPLOAD_MAX_BYTES             | 8388608 (8MiB) | maximum size for uploaded files                |
+| BIND_ADDRESS                 | 0.0.0.0:8000   | address to bind the server to                  |
+| RATE_LIMIT                   | true           | whether download rate should be limited        |
+| RATE_LIMIT_PROXIED           | false          | whether rate limit should read x-forwarded-for |
+| RATE_LIMIT_REPLENISH_SECONDS | 60             | seconds to wait between requests               |
+| RATE_LIMIT_BURST             | 480            | allowed request burst                          |
+| ABUSE_MAIL                   |                | email address to report abuse to               |
+
+### Database configuration
+
+| environment variable | default value |
+| -------------------- | ------------- |
+| DATABASE_URL         |               |
+| DATABASE_USER        |               |
+| DATABASE_PASS        |               |
+| DATABASE_HOST        | localhost     |
+| DATABASE_NAME        | datatrash     |
+
+### No auth limits configuration
+
+Require authentication for certain uploads
+
+- The password is provided as plain text
+- Uploads with longer validity than NO_AUTH_MAX_TIME require authentication
+- Uploads larger than NO_AUTH_LARGE_FILE_SIZE require auth when they are valid for longer than
+  NO_AUTH_LARGE_FILE_MAX_TIME
+- All times are in seconds, the size is in bytes
+
+| environment variable        | default value |
+| --------------------------- | ------------- |
+| AUTH_PASSWORD               |               |
+| NO_AUTH_MAX_TIME            |               |
+| NO_AUTH_LARGE_FILE_MAX_TIME |               |
+| NO_AUTH_LARGE_FILE_SIZE     |               |
 
 ## compiling
 
@@ -16,23 +69,3 @@ or
 docker build -t datatrash .
 docker cp datatrash:/home/rust/.cargo/bin/datatrash datatrash
 ```
-
-or, to just run it in docker
-
-```sh
-docker-compose up -d --build
-```
-
-## running & config
-
-The static files directory needs to be next to the binary.
-
-| environment variable | default value         |
-| -------------------- | --------------------- |
-| DATABASE_URL         | postresql://localhost |
-| SERVER_URL           | http://loalhost:8000  |
-| FILES_DIR            | ./files               |
-| UPLOAD_MAX_BYTES     | 8388608 (8MiB)        |
-| BIND_ADDRESS         | 0.0.0.0:8000          |
-
-The maximum filename length is 255

datatrash-favicon-inkscape.svg

@@ -0,0 +1,72 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   width="20.040001mm"
+   height="32.470001mm"
+   viewBox="0 0 20.040001 32.470002"
+   version="1.1"
+   id="svg5"
+   inkscape:version="1.2.2 (b0a8486541, 2022-12-01)"
+   sodipodi:docname="datatrash-favicon.svg"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:svg="http://www.w3.org/2000/svg">
+  <sodipodi:namedview
+     id="namedview7"
+     pagecolor="#505050"
+     bordercolor="#eeeeee"
+     borderopacity="1"
+     inkscape:showpageshadow="0"
+     inkscape:pageopacity="0"
+     inkscape:pagecheckerboard="0"
+     inkscape:deskcolor="#505050"
+     inkscape:document-units="mm"
+     showgrid="false"
+     showguides="false"
+     inkscape:zoom="4"
+     inkscape:cx="6.875"
+     inkscape:cy="74.375"
+     inkscape:window-width="1661"
+     inkscape:window-height="1354"
+     inkscape:window-x="0"
+     inkscape:window-y="0"
+     inkscape:window-maximized="1"
+     inkscape:current-layer="layer1" />
+  <defs
+     id="defs2" />
+  <g
+     inkscape:label="Layer 1"
+     inkscape:groupmode="layer"
+     id="layer1">
+    <path
+       id="path27079"
+       style="fill:#ffffff;stroke:none;stroke-width:0"
+       d="M 0,3.4728255 19.692763,1.0182368e-8 20.04,1.9695374 0.34723656,5.4423629 Z" />
+    <path
+       id="path27076"
+       style="fill:#ffffff;stroke:none;stroke-width:0"
+       d="M 0.42165307,7.3209983 H 19.618346 V 9.3209188 H 0.42165307 Z" />
+    <path
+       id="path27073"
+       style="fill:#ffffff;stroke:none;stroke-width:0"
+       d="M 0.82158379,12.920776 H 19.218416 v 1.99992 H 0.82158379 Z" />
+    <path
+       id="path27070"
+       style="fill:#ffffff;stroke:none;stroke-width:0"
+       d="M 1.2215157,18.520553 H 18.818485 v 1.999921 H 1.2215157 Z" />
+    <path
+       style="fill:#ffffff;fill-opacity:1;fill-rule:nonzero;stroke:none;stroke-width:0;stroke-dasharray:none;paint-order:normal"
+       d="m 6.9813387,24.122065 a 4.999139,4.9998014 0 0 1 2.3095393,1.999798 h 9.129654 v -1.999798 z"
+       id="path27067" />
+    <path
+       id="path27064"
+       style="fill:#ffffff;fill-opacity:1;fill-rule:nonzero;stroke:none;stroke-width:0;stroke-dasharray:none;paint-order:normal"
+       d="M 9.9160553,29.7184 A 4.999139,4.9998014 0 0 1 9.0170401,31.718199 H 18.017524 V 29.7184 Z" />
+    <path
+       id="path27061"
+       style="fill:#ffffff;stroke:none;stroke-width:0"
+       d="M 8.7702156,28.720149 A 3.7493543,3.749851 0 0 1 5.0208613,32.47 3.7493543,3.749851 0 0 1 1.271507,28.720149 3.7493543,3.749851 0 0 1 5.0208613,24.970298 3.7493543,3.749851 0 0 1 8.7702156,28.720149 Z" />
+  </g>
+</svg>

docker-compose.yml

@@ -1,15 +0,0 @@
-version: "3.3"
-services:
-  datatrash:
-    build: .
-    environment:
-      DATABASE_URL: 'postgresql://admin:secure@postgres'
-    ports:
-      - '8000:8000'
-  postgres:
-    image: postgres
-    environment:
-      POSTGRES_USER: admin
-      POSTGRES_PASSWORD: secure
-
-

docker-compose.yml.sample

@@ -0,0 +1,33 @@
+version: "3.3"
+services:
+  datatrash:
+    build: .
+    container_name: datatrash
+    volumes:
+      - /var/datatrash/files:/opt/datatrash/files
+    environment:
+      DATABASE_HOST: db
+      DATABASE_USER: datatrash
+      DATABASE_PASS: database_password
+      # UPLOAD_MAX_BYTES: 1073741824 # 1 GiB
+      # BIND_ADDRESS: 0.0.0.0:8000
+      # FILES_DIR: /opt/datatrash/files
+      # AUTH_PASSWORD: auth_password
+      # NO_AUTH_MAX_TIME: 604800
+      # NO_AUTH_LARGE_FILE_MAX_TIME: 1800
+      # NO_AUTH_LARGE_FILE_SIZE: 10485760
+    ports:
+      - "80:8000"
+    restart: unless-stopped
+    depends_on:
+      - db
+  db:
+    image: postgres
+    container_name: datatrash-db
+    volumes:
+      - /var/datatrash/db:/var/lib/postgresql/data
+    environment:
+      POSTGRES_DB: datatrash
+      POSTGRES_USER: datatrash
+      POSTGRES_PASSWORD: database_password
+    restart: unless-stopped

init-db.sql

@@ -1,8 +1,17 @@
 CREATE TABLE IF NOT EXISTS files (
     id serial,
-    file_id varchar(255) not null,
+    file_id varchar(255) not null unique,
     file_name varchar(255) not null,
     valid_till timestamp not null,
     kind varchar(255) not null,
     primary key (id)
 );
+
+ALTER TABLE files ADD COLUMN IF NOT EXISTS delete_on_download boolean;
+ALTER TABLE files ALTER COLUMN delete_on_download set not null;
+ALTER TABLE files ALTER COLUMN valid_till TYPE timestamptz;
+ALTER TABLE files ADD COLUMN IF NOT EXISTS content_type varchar(255) not null
+    GENERATED ALWAYS AS (CASE WHEN kind = 'text' THEN 'text/plain' ELSE 'application/octet-stream' END) STORED;
+ALTER TABLE files ALTER COLUMN content_type DROP EXPRESSION IF EXISTS;
+ALTER TABLE files DROP COLUMN IF EXISTS kind;
+ALTER TABLE files ALTER COLUMN file_name DROP NOT NULL;

snippet/abuse.html.snippet

@@ -0,0 +1,6 @@
+
+      <a
+        href="mailto:{abusemail}?subject=Inhaltsmeldung%20datatrash&body=Dies%20ist%20eine%20Inhaltsmeldung%20f%C3%BCr%20eine%20Datei%20auf%20deiner%20datatrash-Instanz.%0ADie%20illegale%20Datei%20ist%20aktuell%20unter%20folgender%20URL%20abrufbar%3A%0A%0A{url}"
+      >
+        inhalt melden
+      </a>

snippet/auth.html.snippet

@@ -0,0 +1,9 @@
+
+        <div id="password-input">
+          <label for="password">
+            passwort benötigt (&gt;{auth_time} oder datei &gt;{auth_large_size} und &gt;{auth_large_time})
+          </label>
+          <br />
+          <input id="password" name="password" type="password" />
+        </div>
+        <script nonce="{script_nonce}" src="/static/auth-hide.js"></script>

snippet/file_name.html.snippet

@@ -0,0 +1 @@
+<h2>{file_name}</h2>

snippet/max_size.html.snippet

@@ -0,0 +1 @@
+ (maximal {max_size})

src/config.rs

@@ -0,0 +1,96 @@
+use std::env;
+
+use std::path::PathBuf;
+use std::str::FromStr;
+use time::ext::NumericalDuration;
+use time::Duration;
+use tokio::fs;
+
+#[derive(Clone)]
+pub struct Config {
+    pub static_dir: PathBuf,
+    pub files_dir: PathBuf,
+    pub max_file_size: Option<u64>,
+    pub no_auth_limits: Option<NoAuthLimits>,
+    pub enable_rate_limit: bool,
+    pub proxied: bool,
+    pub rate_limit_replenish_seconds: u64,
+    pub rate_limit_burst: u32,
+    pub abuse_mail: Option<String>,
+}
+
+#[derive(Clone)]
+pub struct NoAuthLimits {
+    pub auth_password: String,
+    pub max_time: Duration,
+    pub large_file_max_time: Duration,
+    pub large_file_size: u64,
+}
+
+pub async fn from_env() -> Config {
+    let max_file_size = env::var("UPLOAD_MAX_BYTES")
+        .ok()
+        .and_then(|variable| variable.parse().ok())
+        .or(Some(8 * 1024 * 1024))
+        .filter(|&max_file_size| max_file_size != 0);
+
+    let static_dir =
+        PathBuf::from(env::var("STATIC_DIR").unwrap_or_else(|_| "./static".to_owned()));
+    let files_dir = PathBuf::from(env::var("FILES_DIR").unwrap_or_else(|_| "./files".to_owned()));
+    fs::create_dir_all(&files_dir)
+        .await
+        .expect("could not create directory for storing files");
+
+    let no_auth_limits = get_no_auth_limits();
+
+    // default to 480requests/8h
+    let enable_rate_limit = matches!(env::var("RATE_LIMIT").as_deref(), Ok("true") | Err(_));
+    let proxied = env::var("RATE_LIMIT_PROXIED").as_deref() == Ok("true");
+    let rate_limit_replenish_seconds = env::var("RATE_LIMIT_REPLENISH_SECONDS")
+        .ok()
+        .and_then(|rate_limit| rate_limit.parse().ok())
+        .unwrap_or(60);
+    let rate_limit_burst = env::var("RATE_LIMIT_BURST")
+        .ok()
+        .and_then(|burst| burst.parse().ok())
+        .unwrap_or(480);
+    let abuse_mail = env::var("ABUSE_MAIL").ok();
+
+    Config {
+        static_dir,
+        files_dir,
+        max_file_size,
+        no_auth_limits,
+        enable_rate_limit,
+        proxied,
+        rate_limit_replenish_seconds,
+        rate_limit_burst,
+        abuse_mail,
+    }
+}
+
+fn get_no_auth_limits() -> Option<NoAuthLimits> {
+    match (
+        env::var("AUTH_PASSWORD").ok(),
+        env_number::<i64>("NO_AUTH_MAX_TIME"),
+        env_number::<i64>("NO_AUTH_LARGE_FILE_MAX_TIME"),
+        env_number("NO_AUTH_LARGE_FILE_SIZE"),
+    ) {
+        (Some(auth_password), Some(max_time), Some(large_file_max_time), Some(large_file_size)) => {
+            Some(NoAuthLimits {
+                auth_password,
+                max_time: max_time.seconds(),
+                large_file_max_time: large_file_max_time.seconds(),
+                large_file_size,
+            })
+        }
+        (None, None, None, None) => None,
+        _ => {
+            panic!("Incomplete NO_AUTH configuration: All environment variables must be specified")
+        }
+    }
+}
+
+fn env_number<T: FromStr>(variable: &str) -> Option<T> {
+    env::var(variable).ok().and_then(|n| n.parse::<T>().ok())
+}

src/db.rs

@@ -0,0 +1,44 @@
+use sqlx::postgres::{PgPool, PgPoolOptions};
+use std::env;
+use time::ext::NumericalStdDuration;
+
+pub async fn setup() -> PgPool {
+    let conn_url = &get_db_url();
+    log::info!("Using Connection string {}", conn_url);
+
+    let pool = PgPoolOptions::new()
+        .max_connections(5)
+        .acquire_timeout(5.std_seconds())
+        .connect(conn_url)
+        .await
+        .expect("could not create db pool");
+
+    for query in include_str!("../init-db.sql").split_inclusive(';') {
+        sqlx::query(query)
+            .execute(&pool)
+            .await
+            .expect("could not initialize database schema");
+    }
+
+    pool
+}
+
+fn get_db_url() -> String {
+    if let Ok(database_url) = env::var("DATABASE_URL") {
+        return database_url;
+    }
+
+    let auth = if let Ok(user) = env::var("DATABASE_USER") {
+        if let Ok(pass) = env::var("DATABASE_PASS") {
+            format!("{user}:{pass}@")
+        } else {
+            format!("{user}@")
+        }
+    } else {
+        String::new()
+    };
+
+    let host = env::var("DATABASE_HOST").unwrap_or_else(|_| "localhost".to_string());
+    let name = env::var("DATABASE_NAME").unwrap_or_else(|_| "datatrash".to_string());
+    format!("postgresql://{auth}{host}/{name}")
+}

src/deleter.rs

@@ -1,51 +1,115 @@
-use async_std::{fs, path::PathBuf, sync::Receiver, task};
-use chrono::{prelude::*, Duration};
-use futures::future::FutureExt;
-use sqlx::{postgres::PgPool, Cursor, Row};
+use futures_util::TryStreamExt;
+use sqlx::{postgres::PgPool, Row};
+use std::cmp::max;
+use std::error::Error;
+use std::fmt::Display;
+use std::path::{Path, PathBuf};
+use time::ext::NumericalStdDuration;
+use time::OffsetDateTime;
+use tokio::fs;
+use tokio::sync::mpsc::Receiver;
+use tokio::time::timeout;
 
-pub(crate) async fn delete_old_files(receiver: Receiver<()>, db: PgPool, files_dir: PathBuf) {
+pub(crate) async fn delete_old_files(
+    mut receiver: Receiver<()>,
+    db: PgPool,
+    files_dir: PathBuf,
+) -> Result<(), DeletionError> {
     loop {
-        wait_for_file_expiry(&receiver, &db).await;
+        wait_for_file_expiry(&mut receiver, &db).await?;
 
-        let now = Local::now().naive_local();
-        let mut cursor = sqlx::query("SELECT file_id FROM files WHERE files.valid_till < $1")
+        let now = OffsetDateTime::now_utc();
+        let mut rows = sqlx::query("SELECT file_id FROM files WHERE files.valid_till < $1")
             .bind(now)
             .fetch(&db);
-        while let Some(row) = cursor.next().await.expect("could not load expired files") {
-            let file_id: String = row.get("file_id");
-            let mut path = files_dir.clone();
-            path.push(&file_id);
-            if path.exists().await {
-                log::info!("delete file {}", file_id);
-                fs::remove_file(&path).await.expect("could not delete file");
-            }
+        while let Some(row) = rows.try_next().await? {
+            let file_id: String = row.try_get("file_id").expect("we selected this column");
+            delete_content(&file_id, &files_dir).await?;
         }
 
         sqlx::query("DELETE FROM files WHERE valid_till < $1")
             .bind(now)
             .execute(&db)
-            .await
-            .expect("could not delete expired files from database");
+            .await?;
     }
 }
 
-async fn wait_for_file_expiry(receiver: &Receiver<()>, db: &PgPool) {
-    let mut cursor = sqlx::query("SELECT MIN(valid_till) as min from files").fetch(db);
-    let row = cursor
-        .next()
-        .await
-        .expect("could not fetch expiring files from database")
-        .expect("postgres min did not return any row");
-    let valid_till: Option<NaiveDateTime> = row.get("min");
-    let next_timeout = match valid_till {
-        Some(valid_till) => valid_till.signed_duration_since(Local::now().naive_local()),
-        None => Duration::days(1),
+pub(crate) async fn delete_by_id(
+    db: &PgPool,
+    file_id: &str,
+    files_dir: &Path,
+) -> Result<(), sqlx::Error> {
+    delete_content(file_id, files_dir).await?;
+    sqlx::query("DELETE FROM files WHERE file_id = $1")
+        .bind(file_id)
+        .execute(db)
+        .await?;
+    Ok(())
+}
+
+async fn delete_content(file_id: &str, files_dir: &Path) -> Result<(), std::io::Error> {
+    let path = files_dir.join(file_id);
+    if fs::try_exists(&path).await? {
+        fs::remove_file(&path).await?;
+        log::info!("deleted file {}", file_id);
+    } else {
+        log::warn!("expiring file {} was missing from the filesystem", file_id);
+    }
+    Ok(())
+}
+
+async fn wait_for_file_expiry(
+    receiver: &mut Receiver<()>,
+    db: &PgPool,
+) -> Result<(), DeletionError> {
+    let valid_till: (Option<OffsetDateTime>,) =
+        sqlx::query_as("SELECT MIN(valid_till) as min from files")
+            .fetch_one(db)
+            .await?;
+    let next_timeout = match valid_till.0 {
+        Some(valid_till) => (max(
+            0,
+            valid_till.unix_timestamp() - OffsetDateTime::now_utc().unix_timestamp(),
+        ) as u64)
+            .std_seconds(),
+        None => 1_u64.std_days(),
     };
-    let positive_timeout = next_timeout
-        .to_std()
-        .unwrap_or_else(|_| std::time::Duration::from_secs(0));
-    futures::select! {
-        _ = task::sleep(positive_timeout).fuse() => {}
-        _ = receiver.recv().fuse() => {}
+    let _ = timeout(next_timeout, receiver.recv()).await;
+    Ok(())
+}
+
+#[derive(Debug)]
+pub enum DeletionError {
+    Db(sqlx::Error),
+    Fs(std::io::Error),
+}
+
+impl From<sqlx::Error> for DeletionError {
+    fn from(value: sqlx::Error) -> Self {
+        DeletionError::Db(value)
+    }
+}
+
+impl From<std::io::Error> for DeletionError {
+    fn from(value: std::io::Error) -> Self {
+        DeletionError::Fs(value)
+    }
+}
+
+impl Display for DeletionError {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            DeletionError::Db(_) => write!(f, "Failed to fetch expired files from database"),
+            DeletionError::Fs(_) => write!(f, "Failed to delete file from filesystem"),
+        }
+    }
+}
+
+impl Error for DeletionError {
+    fn source(&self) -> Option<&(dyn Error + 'static)> {
+        match self {
+            DeletionError::Db(err) => Some(err),
+            DeletionError::Fs(err) => Some(err),
+        }
     }
 }

src/download.rs

@@ -0,0 +1,234 @@
+use std::{io::ErrorKind, time::SystemTime};
+
+use actix_files::NamedFile;
+use actix_web::{
+    error,
+    http::header::{
+        Accept, CacheControl, CacheDirective, Charset, ContentDisposition, DispositionParam,
+        DispositionType, Expires, ExtendedValue, Header, HeaderValue, HttpDate, TryIntoHeaderValue,
+        ACCEPT, CACHE_CONTROL, CONTENT_TYPE, EXPIRES, VARY,
+    },
+    web, Error, HttpRequest, HttpResponse,
+};
+use mime::{Mime, APPLICATION_OCTET_STREAM, TEXT_HTML};
+use sqlx::postgres::PgPool;
+use std::path::Path;
+use time::OffsetDateTime;
+use tokio::fs;
+
+use crate::{
+    config::Config,
+    deleter,
+    file_info::{self, FileInfo},
+    mime_relations, template,
+};
+
+const TEXT_VIEW_SIZE_LIMIT: u64 = 512 * 1024; // 512KiB
+
+enum ViewType {
+    Raw,
+    Download,
+    Html,
+}
+
+pub async fn download(
+    req: HttpRequest,
+    db: web::Data<PgPool>,
+    config: web::Data<Config>,
+) -> Result<HttpResponse, Error> {
+    let id = req.match_info().query("id");
+    let file_info = file_info::find_by_id(id, &db)
+        .await
+        .map_err(|db_err| {
+            log::error!("could not run select statement {:?}", db_err);
+            error::ErrorInternalServerError("could not run select statement")
+        })?
+        .ok_or_else(|| error::ErrorNotFound("file does not exist or has expired"))?;
+    let delete = file_info.delete_on_download;
+    let valid_till = file_info.valid_till;
+    let path = config.files_dir.join(&file_info.file_id);
+
+    let mut response = match get_view_type(&file_info, &path, &req).await {
+        ViewType::Raw => build_file_response(file_info, &path, false, &req),
+        ViewType::Download => build_file_response(file_info, &path, true, &req),
+        ViewType::Html => build_html_response(file_info, &path, &config, &req).await,
+    }?;
+
+    insert_cache_headers(&mut response, valid_till);
+
+    if delete {
+        deleter::delete_by_id(&db, id, &config.files_dir)
+            .await
+            .map_err(|db_err| {
+                log::error!("could not delete file {:?}", db_err);
+                error::ErrorInternalServerError("could not delete file")
+            })?;
+    }
+
+    Ok(response)
+}
+
+async fn get_view_type(file_info: &FileInfo, file_path: &Path, req: &HttpRequest) -> ViewType {
+    if file_info.delete_on_download || req.query_string().contains("dl") {
+        return ViewType::Download;
+    }
+    if req.query_string().contains("raw") {
+        return ViewType::Raw;
+    }
+    if !mime_relations::matches_text(&file_info.content_type) {
+        return ViewType::Raw;
+    }
+    if get_file_size(file_path).await >= TEXT_VIEW_SIZE_LIMIT {
+        return ViewType::Raw;
+    }
+    if let Ok(accept) = Accept::parse(req) {
+        for accept_mime in accept.ranked() {
+            if accept_mime == TEXT_HTML {
+                return ViewType::Html;
+            }
+            if mime_matches(&accept_mime, &file_info.content_type) {
+                break;
+            }
+        }
+    }
+    ViewType::Raw
+}
+
+fn mime_matches(accept: &Mime, content: &Mime) -> bool {
+    let type_matches = accept.type_() == content.type_() || accept.type_() == mime::STAR;
+    let subtype_matches = accept.subtype() == content.subtype() || accept.subtype() == mime::STAR;
+    type_matches && subtype_matches
+}
+
+async fn get_file_size(file_path: &Path) -> u64 {
+    fs::metadata(file_path)
+        .await
+        .map(|metadata| metadata.len())
+        .unwrap_or(0)
+}
+
+async fn build_html_response(
+    file_info: FileInfo,
+    path: &Path,
+    config: &Config,
+    req: &HttpRequest,
+) -> Result<HttpResponse, Error> {
+    let content = match fs::read_to_string(path).await {
+        Ok(content) => content,
+        Err(file_err) if file_err.kind() == ErrorKind::InvalidData => {
+            // content may not be valid UTF-8, try to return the raw file instead
+            return build_file_response(file_info, path, false, req);
+        }
+        Err(file_err) => {
+            log::error!("file could not be read: {:?}", file_err);
+            return Err(error::ErrorInternalServerError(
+                "this file should be here but could not be found",
+            ));
+        }
+    };
+    let html_view =
+        template::build_html_view_template(&content, file_info.file_name.as_deref(), req, config);
+    Ok(HttpResponse::Ok()
+        .content_type(TEXT_HTML.to_string())
+        .body(html_view))
+}
+
+fn build_file_response(
+    file_info: FileInfo,
+    path: &Path,
+    download: bool,
+    req: &HttpRequest,
+) -> Result<HttpResponse, Error> {
+    let file_name: String = file_info.file_name.unwrap_or_else(|| {
+        let file_id = file_info.file_id;
+        let extension = mime_relations::get_extension(&file_info.content_type).unwrap_or("txt");
+        format!("{file_id}.{extension}")
+    });
+    let content_disposition = ContentDisposition {
+        disposition: if download {
+            DispositionType::Attachment
+        } else {
+            DispositionType::Inline
+        },
+        parameters: get_disposition_params(file_name),
+    };
+    let file = NamedFile::open(path)
+        .map_err(|file_err| {
+            log::error!("file could not be read: {:?}", file_err);
+            error::ErrorInternalServerError("this file should be here but could not be found")
+        })?
+        .set_content_type(file_info.content_type)
+        .set_content_disposition(content_disposition);
+
+    let mut response = file.into_response(req);
+    append_security_headers(&mut response, req);
+    Ok(response)
+}
+
+fn get_disposition_params(filename: String) -> Vec<DispositionParam> {
+    if !filename.is_ascii() {
+        vec![
+            DispositionParam::Filename(filename.clone()),
+            DispositionParam::FilenameExt(ExtendedValue {
+                charset: Charset::Ext(String::from("UTF-8")),
+                language_tag: None,
+                value: filename.into_bytes(),
+            }),
+        ]
+    } else {
+        vec![DispositionParam::Filename(filename)]
+    }
+}
+
+const ALLOWED_CONTEXTS: [&str; 6] = ["audio", "document", "empty", "font", "image", "video"];
+
+fn append_security_headers(response: &mut HttpResponse, req: &HttpRequest) {
+    // if the browser is trying to fetch this resource in a secure context pretend the response is
+    // just binary data so it won't be executed
+    let sec_fetch_dest = req
+        .headers()
+        .get("sec-fetch-dest")
+        .map(|v| v.to_str().unwrap_or("unknown"));
+    if sec_fetch_dest.is_some_and(|sec_fetch_dest| !ALLOWED_CONTEXTS.contains(&sec_fetch_dest)) {
+        response.headers_mut().insert(
+            CONTENT_TYPE,
+            HeaderValue::from_str(APPLICATION_OCTET_STREAM.as_ref())
+                .expect("mime type can be encoded to header value"),
+        );
+    }
+    // the response varies based on these request headers
+    response
+        .headers_mut()
+        .append(VARY, HeaderValue::from_static("sec-fetch-dest"));
+}
+
+fn insert_cache_headers(response: &mut HttpResponse, valid_till: OffsetDateTime) {
+    if response.status().is_success() {
+        let valid_duration = valid_till - OffsetDateTime::now_utc();
+        let valid_cache_seconds =
+            valid_duration.whole_seconds().clamp(0, i64::from(u32::MAX)) as u32;
+        response.headers_mut().insert(
+            CACHE_CONTROL,
+            CacheControl(vec![
+                CacheDirective::Public,
+                CacheDirective::MustRevalidate,
+                CacheDirective::MaxAge(valid_cache_seconds),
+                CacheDirective::NoTransform,
+                CacheDirective::Extension("immutable".to_owned(), None),
+            ])
+            .try_into_value()
+            .unwrap(),
+        );
+        response.headers_mut().insert(
+            EXPIRES,
+            Expires(HttpDate::from(
+                SystemTime::now() + std::time::Duration::from_secs(valid_cache_seconds.into()),
+            ))
+            .try_into_value()
+            .unwrap(),
+        );
+    }
+    response
+        .headers_mut()
+        .append(VARY, HeaderValue::from_name(ACCEPT));
+}

src/file_info.rs

@@ -0,0 +1,69 @@
+use mime::{Mime, APPLICATION_OCTET_STREAM};
+use sqlx::{postgres::PgRow, FromRow, Row};
+use time::OffsetDateTime;
+
+use crate::multipart::UploadConfig;
+
+pub struct FileInfo {
+    pub file_id: String,
+    pub file_name: Option<String>,
+    pub valid_till: OffsetDateTime,
+    pub content_type: Mime,
+    pub delete_on_download: bool,
+}
+
+impl FileInfo {
+    pub fn new(file_id: String, upload_config: UploadConfig) -> Self {
+        Self {
+            file_id,
+            file_name: upload_config.original_name,
+            valid_till: upload_config.valid_till,
+            content_type: upload_config.content_type,
+            delete_on_download: upload_config.delete_on_download,
+        }
+    }
+}
+
+pub async fn find_by_id(
+    id: &str,
+    db: &sqlx::Pool<sqlx::Postgres>,
+) -> Result<Option<FileInfo>, sqlx::Error> {
+    sqlx::query_as(
+        "SELECT file_id, file_name, valid_till, content_type, delete_on_download from files WHERE file_id = $1",
+    )
+    .bind(id)
+    .fetch_optional(db)
+    .await
+}
+
+pub async fn create(file_info: &FileInfo, db: &sqlx::Pool<sqlx::Postgres>) -> Result<(), sqlx::Error> {
+    sqlx::query(
+        "INSERT INTO Files (file_id, file_name, content_type, valid_till, delete_on_download) \
+        VALUES ($1, $2, $3, $4, $5)",
+    )
+    .bind(&file_info.file_id)
+    .bind(&file_info.file_name)
+    .bind(file_info.content_type.to_string())
+    .bind(file_info.valid_till)
+    .bind(file_info.delete_on_download)
+    .execute(db)
+    .await
+    .map(|_| ())
+}
+
+impl FromRow<'_, PgRow> for FileInfo {
+    fn from_row(row: &'_ PgRow) -> Result<Self, sqlx::Error> {
+        Ok(Self {
+            file_id: row.try_get("file_id")?,
+            file_name: row.try_get("file_name")?,
+            valid_till: row.try_get("valid_till")?,
+            content_type: row
+                .try_get_raw("content_type")?
+                .as_str()
+                .map_err(sqlx::Error::Decode)?
+                .parse()
+                .unwrap_or(APPLICATION_OCTET_STREAM),
+            delete_on_download: row.try_get("delete_on_download")?,
+        })
+    }
+}

src/file_kind.rs

@@ -1,27 +0,0 @@
-use std::{fmt::Display, str::FromStr};
-
-#[derive(Debug)]
-pub(crate) enum FileKind {
-    TEXT,
-    BINARY,
-}
-
-impl Display for FileKind {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        match self {
-            FileKind::TEXT => write!(f, "text"),
-            FileKind::BINARY => write!(f, "binary"),
-        }
-    }
-}
-
-impl FromStr for FileKind {
-    type Err = String;
-    fn from_str(s: &str) -> Result<Self, Self::Err> {
-        match s.to_lowercase().as_str() {
-            "text" => Ok(FileKind::TEXT),
-            "binary" => Ok(FileKind::BINARY),
-            _ => Err(format!("unknown kind {}", s)),
-        }
-    }
-}

src/main.rs

@@ -1,225 +1,134 @@
+mod config;
+mod db;
 mod deleter;
-mod file_kind;
+mod download;
+mod file_info;
+mod mime_relations;
 mod multipart;
+mod rate_limit;
+mod script_nonce;
+mod template;
+mod upload;
 
-use actix_files::{Files, NamedFile};
-use actix_multipart::Multipart;
-use actix_web::{error, http::header::{ContentDisposition, DispositionParam, DispositionType}, middleware, web::{self, Bytes}, App, Error, FromRequest, HttpRequest, HttpResponse, HttpServer};
-use async_std::{
-    fs,
-    path::PathBuf,
-    sync::{channel, Sender},
-    task,
-};
-use file_kind::FileKind;
-use sqlx::{
-    postgres::{PgPool, PgRow},
-    Cursor, Row,
+use crate::rate_limit::ForwardedPeerIpKeyExtractor;
+use actix_files::Files;
+use actix_governor::{Governor, GovernorConfigBuilder};
+use actix_web::{
+    http::header::{
+        HeaderName, CROSS_ORIGIN_OPENER_POLICY, PERMISSIONS_POLICY, REFERRER_POLICY,
+        X_CONTENT_TYPE_OPTIONS, X_FRAME_OPTIONS, X_XSS_PROTECTION,
+    },
+    middleware::{self, Condition, DefaultHeaders},
+    web::{self, Data},
+    App, Error, HttpResponse, HttpServer,
 };
+use actix_web::middleware::from_fn;
+use env_logger::Env;
+use sqlx::postgres::PgPool;
 use std::env;
+use tokio::sync::mpsc::channel;
 
-const UPLOAD_HTML: &str = include_str!("../template/upload.html");
-const VIEW_HTML: &str = include_str!("../template/view.html");
+static DEFAULT_PERMISSIONS: (HeaderName, &str) = (
+    PERMISSIONS_POLICY,
+    "accelerometer=(), ambient-light-sensor=(), battery=(), camera=(), display-capture=(), document-domain=(), geolocation=(), gyroscope=(), magnetometer=(), microphone=(), midi=(), payment=(), sync-xhr=(), usb=(), web-share=()"
+);
+static DEFAULT_CONTENT_TYPE_OPTIONS: (HeaderName, &str) = (X_CONTENT_TYPE_OPTIONS, "nosniff");
+static DEFAULT_FRAME_OPTIONS: (HeaderName, &str) = (X_FRAME_OPTIONS, "deny");
+static DEFAULT_XSS_PROTECTION: (HeaderName, &str) = (X_XSS_PROTECTION, "1; mode=block");
+static DEFAULT_REFERRER_POLICY: (HeaderName, &str) = (REFERRER_POLICY, "no-referrer");
+static DEFAULT_CROSS_ORIGIN_OPENER_POLICY: (HeaderName, &str) =
+    (CROSS_ORIGIN_OPENER_POLICY, "same-origin");
 
-async fn index() -> Result<NamedFile, Error> {
-    Ok(NamedFile::open("./static/index.html")
-        .map_err(|_| error::ErrorNotFound(""))?
-        .disable_content_disposition())
+async fn not_found() -> Result<HttpResponse, Error> {
+    Ok(HttpResponse::NotFound()
+        .content_type("text/plain")
+        .body("not found"))
 }
 
-async fn upload(
-    payload: Multipart,
-    db: web::Data<PgPool>,
-    sender: web::Data<Sender<()>>,
-    config: web::Data<Config>,
-) -> Result<HttpResponse, Error> {
-    let file_id = format!("{:x?}", rand::random::<u32>());
-    let mut filename = config.files_dir.clone();
-    filename.push(&file_id);
-
-    let (original_name, valid_till, kind) =
-        match multipart::parse_multipart(payload, &file_id, &filename).await {
-            Ok(data) => data,
-            Err(err) => {
-                if filename.exists().await {
-                    fs::remove_file(filename)
-                        .await
-                        .map_err(|_| error::ErrorInternalServerError("could not remove file"))?;
-                }
-                return Err(err);
-            }
-        };
-
-    sqlx::query("INSERT INTO Files (file_id, file_name, valid_till, kind) VALUES ($1, $2, $3, $4)")
-        .bind(&file_id)
-        .bind(original_name.unwrap_or_else(|| file_id.clone()))
-        .bind(valid_till.naive_local())
-        .bind(kind.to_string())
-        .execute(db.as_ref())
-        .await
-        .map_err(|_| error::ErrorInternalServerError("could not insert file into database"))?;
-
-    log::info!(
-        "create new file {} (valid_till: {}, kind: {})",
-        file_id,
-        valid_till,
-        kind
-    );
-
-    sender.send(()).await;
-
-    Ok(HttpResponse::SeeOther()
-        .header("location", format!("/upload/{}", file_id))
-        .finish())
-}
-
-async fn uploaded(id: web::Path<String>, req: web::HttpRequest) -> Result<HttpResponse, Error> {
-    let url = req.url_for("file", &[id.as_str()])?;
-    let upload_html = UPLOAD_HTML
-        .replace("{url}", url.as_str());
-    Ok(HttpResponse::Ok()
-        .content_type("text/html")
-        .body(upload_html))
-}
-
-async fn download(
-    req: HttpRequest,
-    id: web::Path<String>,
-    db: web::Data<PgPool>,
-    config: web::Data<Config>,
-) -> Result<HttpResponse, Error> {
-    let mut cursor = sqlx::query("SELECT file_id, file_name, kind from files WHERE file_id = $1")
-        .bind(id.as_ref())
-        .fetch(db.as_ref());
-    let row: PgRow = cursor
-        .next()
-        .await
-        .map_err(|_| error::ErrorInternalServerError("could not run select statement"))?
-        .ok_or_else(|| error::ErrorNotFound("file does not exist or has expired"))?;
-
-    let file_id: String = row.get("file_id");
-    let file_name: String = row.get("file_name");
-    let kind: String = row.get("kind");
-    let mut path = config.files_dir.clone();
-    path.push(&file_id);
-
-    if kind == FileKind::TEXT.to_string() && !req.query_string().contains("raw") {
-        let content = fs::read_to_string(path).await.map_err(|_| {
-            error::ErrorInternalServerError("this file should be here but could not be found")
-        })?;
-        let encoded = htmlescape::encode_minimal(&content);
-        let view_html = VIEW_HTML.replace("{text}", &encoded);
-        let response = HttpResponse::Ok().content_type("text/html").body(view_html);
-        Ok(response)
-    } else {
-        let file = NamedFile::open(path)
-            .map_err(|_| {
-                error::ErrorInternalServerError("this file should be here but could not be found")
-            })?
-            .set_content_disposition(ContentDisposition {
-                disposition: DispositionType::Attachment,
-                parameters: vec![DispositionParam::Filename(file_name)],
-            });
-        file.into_response(&req)
-    }
-}
-
-fn get_db_url() -> String {
-    return env::var("DATABASE_URL").unwrap_or_else(|_| {
-        let mut url = "postgresql://".to_string();
-
-        let user = env::var("DATABASE_USER").unwrap_or_default();
-        if !user.is_empty() {
-            url += user.as_str();
-
-            let pass = env::var("DATABASE_PASS").unwrap_or_default();
-            if !pass.is_empty() {
-                url += ":";
-                url += pass.as_str();
-            }
-
-            url += "@";
-        }
-        url += env::var("DATABASE_HOST").unwrap_or_else(|_| "localhost".to_string()).as_str();
-        url += "/";
-        url += env::var("DATABASE_NAME").unwrap_or_else(|_| "datatrash".to_string()).as_str();
-
-        url.to_string()
-    });
-}
-
-async fn setup_db() -> PgPool {
-    let conn_url = &get_db_url();
-    log::info!("Using Connection string {}", conn_url);
-
-    let pool = PgPool::builder()
-        .max_size(5)
-        .connect_timeout(std::time::Duration::from_secs(5))
-        .build(conn_url)
-        .await
-        .expect("could not create db pool");
-
-    sqlx::query(include_str!("../init-db.sql"))
-        .execute(&pool)
-        .await
-        .expect("could not create table Files");
-
-    pool
-}
-
-#[derive(Clone)]
-struct Config {
-    files_dir: PathBuf,
-}
-
-#[actix_rt::main]
+#[tokio::main]
 async fn main() -> std::io::Result<()> {
-    if env::var("RUST_LOG").is_err() {
-        env::set_var("RUST_LOG", "info");
-    }
-    env_logger::init();
+    env_logger::Builder::from_env(Env::default().default_filter_or("info,sqlx=warn")).init();
 
-    let pool: PgPool = setup_db().await;
-    let config = Config {
-        files_dir: PathBuf::from(env::var("FILES_DIR").unwrap_or_else(|_| "./files".to_owned())),
-    };
-    fs::create_dir_all(&config.files_dir)
-        .await
-        .expect("could not create directory for storing files");
+    let pool: PgPool = db::setup().await;
+    let config = config::from_env().await;
     let (sender, receiver) = channel(8);
 
-    log::info!("omnomnom");
+    let db = web::Data::new(pool.clone());
+    let expiry_watch_sender = web::Data::new(sender);
+    let bind_address = env::var("BIND_ADDRESS").unwrap_or_else(|_| "0.0.0.0:8000".to_owned());
 
-    task::spawn(deleter::delete_old_files(
+    let deleter = tokio::spawn(deleter::delete_old_files(
         receiver,
-        pool.clone(),
+        pool,
         config.files_dir.clone(),
     ));
 
-    let db = web::Data::new(pool);
-    let sender = web::Data::new(sender);
-    let upload_max_bytes: usize = env::var("UPLOAD_MAX_BYTES")
-        .ok()
-        .and_then(|variable| variable.parse().ok())
-        .unwrap_or(8_388_608);
-    let bind_address = env::var("BIND_ADDRESS").unwrap_or_else(|_| "0.0.0.0:8000".to_owned());
+    template::write_prefillable_templates(&config).await;
+    let config = Data::new(config);
 
-    HttpServer::new({
+    let governor_conf = GovernorConfigBuilder::default()
+        .seconds_per_request(config.rate_limit_replenish_seconds)
+        .burst_size(config.rate_limit_burst)
+        .key_extractor(ForwardedPeerIpKeyExtractor {
+            proxied: config.proxied,
+        })
+        .use_headers()
+        .finish()
+        .unwrap();
+
+    log::info!("Listening on {bind_address}");
+    log::info!("omnomnom");
+
+    let http_server = HttpServer::new({
         move || {
             App::new()
-                .wrap(middleware::Logger::default())
+                .wrap(
+                    DefaultHeaders::new()
+                        .add(DEFAULT_PERMISSIONS.clone())
+                        .add(DEFAULT_CONTENT_TYPE_OPTIONS.clone())
+                        .add(DEFAULT_FRAME_OPTIONS.clone())
+                        .add(DEFAULT_XSS_PROTECTION.clone())
+                        .add(DEFAULT_REFERRER_POLICY.clone())
+                        .add(DEFAULT_CROSS_ORIGIN_OPENER_POLICY.clone()),
+                )
+                .wrap(middleware::Compress::default())
+                .wrap(middleware::NormalizePath::trim())
+                .wrap(from_fn(script_nonce::insert_script_nonce))
                 .app_data(db.clone())
-                .app_data(sender.clone())
-                .app_data(Bytes::configure(|cfg| cfg.limit(upload_max_bytes)))
-                .data(config.clone())
-                .service(web::resource("/").route(web::get().to(index)))
-                .service(web::resource("/upload").route(web::post().to(upload)))
-                .service(web::resource("/upload/{id}").route(web::get().to(uploaded)))
-                .service(web::resource("/file/{id}").name("file").route(web::get().to(download)))
+                .app_data(expiry_watch_sender.clone())
+                .app_data(config.clone())
+                .service(
+                    web::resource("/")
+                        .route(web::get().to(upload::index))
+                        .route(web::head().to(upload::index)),
+                )
+                .service(web::resource("/upload").route(web::post().to(upload::upload)))
+                .service(
+                    web::resource(["/upload/{id}", "/upload/{id}/{name}"])
+                        .route(web::get().to(upload::uploaded))
+                        .route(web::head().to(upload::uploaded)),
+                )
                 .service(Files::new("/static", "static").disable_content_disposition())
+                .default_service(web::route().to(not_found))
+                .service(
+                    web::resource(["/{id:[a-z0-9]{5}}", "/{id:[a-z0-9]{5}}/{name}"])
+                        .wrap(Condition::new(
+                            config.enable_rate_limit,
+                            Governor::new(&governor_conf),
+                        ))
+                        .route(web::get().to(download::download))
+                        .route(web::head().to(download::download)),
+                )
         }
     })
     .bind(bind_address)?
-    .run()
-    .await
+    .run();
+
+    // exit when http_server exits OR when deleter errors
+    tokio::select! {
+        result = http_server => result,
+        result = deleter => {
+            result?.map(|_| unreachable!("deletion runs infinitely")).expect("deletion may not fail")
+        },
+    }
 }

src/mime_relations.rs

@@ -0,0 +1,71 @@
+use std::{
+    collections::{HashMap, VecDeque},
+    str::FromStr,
+};
+
+use lazy_static::lazy_static;
+use mime::Mime;
+
+lazy_static! {
+    static ref ALIASES: HashMap<Mime, Mime> = load_mime_aliases();
+    static ref PARENTS: Vec<(Mime, Mime)> = load_mime_parent_relations();
+    static ref EXTENSIONS: HashMap<Mime, &'static str> = load_mime_extensions();
+}
+
+fn load_mime_aliases() -> HashMap<Mime, Mime> {
+    tree_magic_db::aliases()
+        .lines()
+        .filter_map(|line| line.split_once(' '))
+        .filter_map(|(alias, mime)| Some((Mime::from_str(alias).ok()?, Mime::from_str(mime).ok()?)))
+        .collect()
+}
+
+fn load_mime_parent_relations() -> Vec<(Mime, Mime)> {
+    tree_magic_db::subclasses()
+        .lines()
+        .filter_map(|line| line.split_once(' '))
+        .filter_map(|(child, parent)| {
+            Some((Mime::from_str(child).ok()?, Mime::from_str(parent).ok()?))
+        })
+        .collect()
+}
+
+fn load_mime_extensions() -> HashMap<Mime, &'static str> {
+    include_str!("../mime.types")
+        .lines()
+        .filter(|line| !line.is_empty() && !line.starts_with('#'))
+        .map(str::split_whitespace)
+        .filter_map(|mut elements| Some((Mime::from_str(elements.next()?).ok()?, elements.next()?)))
+        .map(|(mime, extension)| (ALIASES.get(&mime).cloned().unwrap_or(mime), extension))
+        .collect()
+}
+
+pub(crate) fn get_alias(mimetype: Mime) -> Mime {
+    ALIASES.get(&mimetype).cloned().unwrap_or(mimetype)
+}
+
+fn get_mime_parents(mimetype: &Mime) -> Vec<&Mime> {
+    PARENTS
+        .iter()
+        .filter_map(|(child, parent)| (child == mimetype).then_some(parent))
+        .collect()
+}
+
+pub(crate) fn matches_text(mime: &Mime) -> bool {
+    if mime.type_() == mime::TEXT {
+        return true;
+    }
+    return get_mime_parents(mime).into_iter().any(matches_text);
+}
+
+pub(crate) fn get_extension(mimetype: &Mime) -> Option<&'static str> {
+    let mut queue = VecDeque::new();
+    queue.push_back(mimetype);
+    while let Some(mime) = queue.pop_front() {
+        match EXTENSIONS.get(mimetype).copied() {
+            Some(ext) => return Some(ext),
+            None => queue.extend(get_mime_parents(mime)),
+        }
+    }
+    None
+}

src/multipart.rs

@@ -1,123 +1,239 @@
-use crate::file_kind::FileKind;
+use crate::{config, mime_relations};
 use actix_multipart::{Field, Multipart};
-use actix_web::{error, http::header::DispositionParam};
-use async_std::{fs, fs::File, path::Path, prelude::*};
-use chrono::{prelude::*, Duration};
-use futures::{StreamExt, TryStreamExt};
+use actix_web::{
+    error,
+    http::header::{ContentDisposition, DispositionParam},
+    Error,
+};
+use futures_util::{StreamExt, TryStreamExt};
+use mime::{Mime, APPLICATION_OCTET_STREAM, TEXT_PLAIN};
+use std::{cmp::min, io::ErrorKind, path::Path};
+use time::{Duration, OffsetDateTime};
+use tokio::{
+    fs::{self, File},
+    io::AsyncWriteExt,
+};
+
+const MAX_UPLOAD_DURATION: Duration = Duration::days(31);
+const DEFAULT_UPLOAD_DURATION: Duration = Duration::minutes(30);
+
+pub(crate) struct UploadConfig {
+    pub original_name: Option<String>,
+    pub content_type: Mime,
+    pub valid_till: OffsetDateTime,
+    pub delete_on_download: bool,
+}
 
 pub(crate) async fn parse_multipart(
-    mut payload: Multipart,
-    file_id: &str,
-    filename: &Path,
-) -> Result<(Option<String>, DateTime<Local>, FileKind), error::Error> {
-    let mut original_name: Option<String> = None;
-    let mut timeout: Option<String> = None;
-    let mut kind: Option<FileKind> = None;
-
-    while let Ok(Some(field)) = payload.try_next().await {
-        let name = get_field_name(&field)?;
-        let name = name.as_str();
-        match name {
-            "validity_secs" => {
-                timeout = Some(parse_string(name, field).await?);
+    payload: Multipart,
+    file_path: &Path,
+    config: &config::Config,
+) -> Result<UploadConfig, error::Error> {
+    match parse_multipart_inner(payload, file_path, config).await {
+        Ok(data) => Ok(data),
+        Err(err) => {
+            match fs::remove_file(file_path).await {
+                Err(err) if err.kind() != ErrorKind::NotFound => {
+                    log::error!("could not remove file {:?}", err);
+                }
+                _ => {}
             }
-            "content" => {
-                let file_original_name = get_original_filename(&field);
-                if file_original_name == None || file_original_name.as_deref() == Some("") {
+            Err(err)
+        }
+    }
+}
+
+pub(crate) async fn parse_multipart_inner(
+    mut payload: Multipart,
+    file_path: &Path,
+    config: &config::Config,
+) -> Result<UploadConfig, error::Error> {
+    let mut original_name: Option<String> = None;
+    let mut content_type: Option<Mime> = None;
+    let mut keep_for_seconds: Option<String> = None;
+    let mut delete_on_download = false;
+    let mut password = None;
+    let mut size = 0;
+
+    while let Ok(Some(mut field)) = payload.try_next().await {
+        let name = get_field_name(&field)
+            .ok_or(error::ParseError::Incomplete)?
+            .to_owned();
+        match name.as_str() {
+            "keep_for" => {
+                keep_for_seconds = Some(parse_string(&name, &mut field).await?);
+            }
+            "file" => {
+                let (mime, uploaded_name) = get_file_metadata(&field);
+                if uploaded_name.is_none() || uploaded_name.as_deref() == Some("") {
                     continue;
                 }
-                original_name = file_original_name;
-                kind = Some(FileKind::BINARY);
-                let mut file = fs::File::create(&filename)
-                    .await
-                    .map_err(|_| error::ErrorInternalServerError("could not create file"))?;
-                write_to_file(&mut file, field)
-                    .await
-                    .map_err(|_| error::ErrorInternalServerError("could not write file"))?;
+                original_name = uploaded_name;
+                let first_bytes;
+                (size, first_bytes) = create_file(file_path, field, config.max_file_size).await?;
+                content_type = Some(
+                    mime.filter(|mime| *mime != APPLICATION_OCTET_STREAM)
+                        .map(mime_relations::get_alias)
+                        .or_else(|| get_content_type(&first_bytes))
+                        .unwrap_or(APPLICATION_OCTET_STREAM),
+                );
             }
-            "text_content" => {
+            "text" => {
                 if original_name.is_some() {
                     continue;
                 }
-                original_name = Some(format!("{}.txt", file_id));
-                kind = Some(FileKind::TEXT);
-                let mut file = fs::File::create(&filename)
-                    .await
-                    .map_err(|_| error::ErrorInternalServerError("could not create file"))?;
-                write_to_file(&mut file, field)
-                    .await
-                    .map_err(|_| error::ErrorInternalServerError("could not write file"))?;
+                let first_bytes;
+                (size, first_bytes) = create_file(file_path, field, config.max_file_size).await?;
+                content_type = Some(get_content_type(&first_bytes).unwrap_or(TEXT_PLAIN));
+            }
+            "delete_on_download" => {
+                delete_on_download = parse_string(&name, &mut field).await? != "false";
+            }
+            "password" => {
+                password = Some(parse_string(&name, &mut field).await?);
             }
             _ => {}
         };
     }
 
-    if let Some(original_name) = &original_name {
+    let content_type =
+        content_type.ok_or_else(|| error::ErrorBadRequest("no content type found"))?;
+    let keep_for = keep_for_seconds
+        .map(|k| k.parse())
+        .transpose()
+        .map_err(|e| error::ErrorBadRequest(format!("field keep_for is not a number: {e}")))?
+        .map_or(DEFAULT_UPLOAD_DURATION, Duration::seconds);
+    let valid_till = OffsetDateTime::now_utc() + keep_for;
+
+    let upload_config = UploadConfig {
+        original_name,
+        content_type,
+        valid_till,
+        delete_on_download,
+    };
+
+    check_requirements(&upload_config, size, &password, &keep_for, config)?;
+
+    Ok(upload_config)
+}
+
+fn check_requirements(
+    upload_config: &UploadConfig,
+    size: u64,
+    password: &Option<String>,
+    keep_for: &Duration,
+    config: &config::Config,
+) -> Result<(), error::Error> {
+    if let Some(original_name) = upload_config.original_name.as_ref() {
         if original_name.len() > 255 {
             return Err(error::ErrorBadRequest("filename is too long"));
         }
     }
 
-    let validity_secs = timeout
-        .ok_or_else(|| error::ErrorBadRequest("field validity_secs not set"))?
-        .parse()
-        .map_err(|e| {
-            error::ErrorBadRequest(format!("field validity_secs is not a number: {}", e))
-        })?;
-    let max_validity_secs = Duration::days(31).num_seconds();
-    if validity_secs > max_validity_secs {
+    if *keep_for > MAX_UPLOAD_DURATION {
         return Err(error::ErrorBadRequest(format!(
-            "maximum allowed validity is {} seconds, but you specified {} seconds",
-            max_validity_secs, validity_secs
+            "maximum allowed validity is {MAX_UPLOAD_DURATION}, but you specified {keep_for}"
         )));
     }
-    let valid_till = Local::now() + Duration::seconds(validity_secs);
-    let kind = kind.ok_or_else(|| error::ErrorBadRequest("no content found"))?;
-    Ok((original_name, valid_till, kind))
+
+    if let Some(no_auth_limits) = &config.no_auth_limits {
+        let requires_auth = *keep_for > no_auth_limits.max_time
+            || *keep_for > no_auth_limits.large_file_max_time
+                && size > no_auth_limits.large_file_size;
+        // hIGh sECUriTy paSsWoRD CHEck
+        if requires_auth && password.as_ref() != Some(&no_auth_limits.auth_password) {
+            return Err(error::ErrorBadRequest(
+                "upload requires authentication, but authentication was incorrect",
+            ));
+        }
+    }
+
+    Ok(())
 }
 
-fn get_field_name(field: &Field) -> Result<String, error::Error> {
-    Ok(field
-        .content_disposition()
-        .ok_or_else(|| error::ParseError::Incomplete)?
-        .get_name()
-        .map(|s| s.to_owned())
-        .ok_or_else(|| error::ParseError::Incomplete)?)
+fn get_field_name(field: &Field) -> Option<&str> {
+    field.content_disposition()?.get_name()
 }
 
-async fn parse_string(name: &str, field: actix_multipart::Field) -> Result<String, error::Error> {
+async fn parse_string(
+    name: &str,
+    field: &mut actix_multipart::Field,
+) -> Result<String, error::Error> {
     let data = read_content(field).await?;
     String::from_utf8(data)
-        .map_err(|_| error::ErrorBadRequest(format!("could not parse field {} as utf-8", name)))
+        .map_err(|_| error::ErrorBadRequest(format!("could not parse field {name} as utf-8")))
 }
 
-async fn read_content(mut field: actix_multipart::Field) -> Result<Vec<u8>, error::Error> {
+async fn read_content(field: &mut actix_multipart::Field) -> Result<Vec<u8>, error::Error> {
     let mut data = Vec::new();
-    while let Some(chunk) = field.next().await {
-        data.extend(chunk.map_err(error::ErrorBadRequest)?);
+    while let Some(chunk) = field.try_next().await.map_err(error::ErrorBadRequest)? {
+        data.extend(chunk);
     }
     Ok(data)
 }
 
+async fn create_file(
+    filename: &Path,
+    field: Field,
+    max_file_size: Option<u64>,
+) -> Result<(u64, Vec<u8>), Error> {
+    let mut file = File::create(&filename).await.map_err(|file_err| {
+        log::error!("could not create file {:?}", file_err);
+        error::ErrorInternalServerError("could not create file")
+    })?;
+    write_to_file(&mut file, field, max_file_size).await
+}
+
 async fn write_to_file(
     file: &mut File,
-    mut field: actix_multipart::Field,
-) -> Result<(), error::Error> {
+    mut field: Field,
+    max_size: Option<u64>,
+) -> Result<(u64, Vec<u8>), error::Error> {
+    let mut first_bytes = Vec::with_capacity(2048);
+    let mut written_bytes: u64 = 0;
     while let Some(chunk) = field.next().await {
-        file.write_all(chunk.map_err(error::ErrorBadRequest)?.as_ref())
-            .await?;
+        let chunk = chunk.map_err(error::ErrorBadRequest)?;
+        written_bytes += chunk.len() as u64;
+        validate_max_size(written_bytes, max_size)?;
+
+        let remaining_first_bytes = min(2048 - first_bytes.len(), chunk.len());
+        first_bytes.extend_from_slice(&chunk[..remaining_first_bytes]);
+
+        file.write_all(&chunk).await.map_err(|write_err| {
+            log::error!("could not write file {:?}", write_err);
+            error::ErrorInternalServerError("could not write file")
+        })?;
+    }
+    Ok((written_bytes, first_bytes))
+}
+
+fn validate_max_size(written_bytes: u64, max_size: Option<u64>) -> Result<(), Error> {
+    if let Some(max_size) = max_size {
+        if written_bytes > max_size {
+            return Err(error::ErrorPayloadTooLarge(format!(
+                "exceeded maximum file size of {max_size} bytes"
+            )));
+        }
     }
     Ok(())
 }
 
-fn get_original_filename(field: &actix_multipart::Field) -> Option<String> {
-    field.content_disposition().and_then(|content_disposition| {
-        content_disposition
-            .parameters
-            .into_iter()
-            .find_map(|param| match param {
-                DispositionParam::Filename(filename) => Some(filename),
-                _ => None,
-            })
-    })
+fn get_file_metadata(field: &actix_multipart::Field) -> (Option<Mime>, Option<String>) {
+    let mime = field.content_type().cloned();
+    let filename = field.content_disposition().and_then(get_filename);
+    (mime, filename)
+}
+
+fn get_filename(content_disposition: &ContentDisposition) -> Option<String> {
+    content_disposition
+        .parameters
+        .iter()
+        .find_map(|param| match param {
+            DispositionParam::Filename(filename) => Some(filename.clone()),
+            _ => None,
+        })
+}
+
+fn get_content_type(bytes: &[u8]) -> Option<Mime> {
+    tree_magic_mini::from_u8(bytes).parse().ok()
 }

src/rate_limit.rs

@@ -0,0 +1,59 @@
+use actix_governor::governor::clock::{Clock, DefaultClock, QuantaInstant};
+use actix_governor::governor::NotUntil;
+use actix_governor::KeyExtractor;
+use actix_governor::PeerIpKeyExtractor;
+use actix_governor::SimpleKeyExtractionError;
+use actix_web::HttpResponse;
+use actix_web::HttpResponseBuilder;
+use actix_web::{dev::ServiceRequest, http::header::ContentType};
+use std::net::{IpAddr, Ipv6Addr};
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub struct ForwardedPeerIpKeyExtractor {
+    pub proxied: bool,
+}
+
+impl KeyExtractor for ForwardedPeerIpKeyExtractor {
+    type Key = IpAddr;
+    type KeyExtractionError = SimpleKeyExtractionError<&'static str>;
+
+    fn extract(&self, req: &ServiceRequest) -> Result<Self::Key, Self::KeyExtractionError> {
+        let forwarded_for = req.headers().get("x-forwarded-for");
+        let ip = if self.proxied && forwarded_for.is_some() {
+            read_forwareded_for(forwarded_for).map_err(SimpleKeyExtractionError::new)?
+        } else {
+            PeerIpKeyExtractor.extract(req)?
+        };
+
+        if let IpAddr::V6(mut ipv6) = ip {
+            // only keep the first /56 for IPv6 addresses
+            ipv6 &= Ipv6Addr::from_bits(u128::MAX << (u128::BITS - 56));
+        }
+
+        Ok(ip)
+    }
+
+    fn exceed_rate_limit_response(
+        &self,
+        negative: &NotUntil<QuantaInstant>,
+        mut response: HttpResponseBuilder,
+    ) -> HttpResponse {
+        let wait_time = negative
+            .wait_time_from(DefaultClock::default().now())
+            .as_secs();
+        response
+            .content_type(ContentType::plaintext())
+            .body(format!("too many requests, retry in {wait_time}s"))
+    }
+}
+
+fn read_forwareded_for(
+    forwarded_for: Option<&actix_web::http::header::HeaderValue>,
+) -> Result<IpAddr, &'static str> {
+    forwarded_for
+        .unwrap()
+        .to_str()
+        .map_err(|_| "x-forwarded-for contains invalid header value")?
+        .parse::<IpAddr>()
+        .map_err(|_| "x-forwarded-for contains invalid ip adress")
+}

src/script_nonce.rs

@@ -0,0 +1,35 @@
+use actix_web::{
+    body::MessageBody,
+    dev::{ServiceRequest, ServiceResponse},
+    http::header::{HeaderValue, CONTENT_SECURITY_POLICY},
+    Error, HttpMessage,
+};
+use actix_web::middleware::Next;
+use rand::Rng;
+use std::fmt::Display;
+
+pub struct ScriptNonce(String);
+
+impl Display for ScriptNonce {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        write!(f, "{}", self.0)
+    }
+}
+
+pub async fn insert_script_nonce(
+    req: ServiceRequest,
+    next: Next<impl MessageBody>,
+) -> Result<ServiceResponse<impl MessageBody>, Error> {
+    let script_nonce = format!("{:02x}", rand::thread_rng().gen::<u128>());
+    req.extensions_mut()
+        .insert(ScriptNonce(script_nonce.clone()));
+    let mut res = next.call(req).await;
+    if let Ok(res) = res.as_mut() {
+        let value = format!("default-src 'none'; connect-src 'self'; img-src 'self'; media-src 'self'; font-src 'self'; script-src 'nonce-{script_nonce}'; style-src 'self'; object-src 'none'; base-uri 'self'; frame-src 'none'; frame-ancestors 'none'; form-action 'self'; require-trusted-types-for 'script';");
+        res.headers_mut().insert(
+            CONTENT_SECURITY_POLICY,
+            HeaderValue::from_str(&value).unwrap(),
+        );
+    }
+    res
+}

src/template.rs

@@ -0,0 +1,207 @@
+use std::{cmp, io::ErrorKind, str::FromStr};
+
+use actix_web::{HttpMessage, HttpRequest};
+use time::Duration;
+use tokio::fs;
+use url::Url;
+
+use crate::{config::Config, script_nonce::ScriptNonce};
+
+const INDEX_HTML: &str = include_str!("../template/index.html");
+const AUTH_HIDE_JS: &str = include_str!("../template/auth-hide.js");
+const AUTH_SNIPPET_HTML: &str = include_str!("../snippet/auth.html.snippet");
+const MAX_SIZE_SNIPPET_HTML: &str = include_str!("../snippet/max_size.html.snippet");
+const FILE_NAME_SNIPPET_HTML: &str = include_str!("../snippet/file_name.html.snippet");
+
+const ABUSE_SNIPPET_HTML: &str = include_str!("../snippet/abuse.html.snippet");
+
+const UPLOAD_HTML: &str = include_str!("../template/upload.html");
+const UPLOAD_SHORT_HTML: &str = include_str!("../template/upload-short.html");
+
+const TEXT_VIEW_HTML: &str = include_str!("../template/text-view.html");
+const URL_VIEW_HTML: &str = include_str!("../template/url-view.html");
+
+pub fn build_uploaded_html(
+    req: &HttpRequest,
+    id: &str,
+    name: Option<&str>,
+    config: &Config,
+) -> String {
+    let upload_html = if name.is_some() {
+        UPLOAD_SHORT_HTML
+            .replace("{link}", &get_file_url(req, id, name))
+            .replace("{shortlink}", &get_file_url(req, id, None))
+    } else {
+        UPLOAD_HTML.replace("{link}", &get_file_url(req, id, name))
+    };
+    let upload_html = insert_abuse_template(upload_html, None, config);
+    insert_script_nonce(req, upload_html)
+}
+
+pub fn get_file_url(req: &HttpRequest, id: &str, name: Option<&str>) -> String {
+    let host = get_host_url(req);
+    if let Some(name) = name {
+        let encoded_name = urlencoding::encode(name);
+        format!("{host}/{id}/{encoded_name}")
+    } else {
+        format!("{host}/{id}")
+    }
+}
+
+pub fn build_html_view_template(
+    content: &str,
+    file_name: Option<&str>,
+    req: &HttpRequest,
+    config: &Config,
+) -> String {
+    let encoded_content = htmlescape::encode_minimal(content);
+    let name_snippet = file_name
+        .map(htmlescape::encode_minimal)
+        .map(|name| FILE_NAME_SNIPPET_HTML.replace("{file_name}", &name))
+        .unwrap_or_default();
+    let html = if !content.trim().contains(['\n', '\r']) && Url::from_str(content.trim()).is_ok() {
+        let attribute_encoded_content = htmlescape::encode_attribute(content);
+        URL_VIEW_HTML
+            .replace("{link_content}", &encoded_content)
+            .replace("{link_attribute}", &attribute_encoded_content)
+    } else {
+        TEXT_VIEW_HTML
+            .replace("{file_name}", &name_snippet)
+            .replace("{text}", &encoded_content)
+    };
+    let html = insert_abuse_template(html, Some(req), config);
+    insert_script_nonce(req, html)
+}
+
+pub async fn write_prefillable_templates(config: &Config) {
+    let auth_hide_path = config.static_dir.join("auth-hide.js");
+    if let Some(auth_hide_js) = build_auth_hide_js(config) {
+        fs::write(auth_hide_path, auth_hide_js)
+            .await
+            .expect("could not write auth-hide.js to static folder");
+    } else {
+        match fs::remove_file(auth_hide_path).await {
+            Err(err) if err.kind() == ErrorKind::NotFound => {}
+            r => r.expect("could not delete auth-hide.js from static folder"),
+        }
+    }
+}
+
+pub fn build_index_html(req: &HttpRequest, config: &Config) -> String {
+    let mut html = INDEX_HTML.to_owned();
+    if let Some(limit) = config.no_auth_limits.as_ref() {
+        html = html
+            .replace("{auth_snippet}", AUTH_SNIPPET_HTML.trim_end())
+            .replace("{auth_time}", &render_duration(limit.max_time))
+            .replace(
+                "{auth_large_time}",
+                &render_duration(limit.large_file_max_time),
+            )
+            .replace(
+                "{auth_large_size}",
+                &render_file_size(limit.large_file_size),
+            );
+    } else {
+        html = html.replace("{auth_snippet}", "");
+    }
+    html = insert_abuse_template(html, None, config);
+    if let Some(max_file_size) = config.max_file_size {
+        html = html
+            .replace("{max_size_snippet}", MAX_SIZE_SNIPPET_HTML.trim_end())
+            .replace("{max_size}", &render_file_size(max_file_size));
+    } else {
+        html = html.replace("{max_size_snippet}", "");
+    };
+    insert_script_nonce(req, html)
+}
+
+pub fn insert_abuse_template(html: String, req: Option<&HttpRequest>, config: &Config) -> String {
+    if let Some(abuse_mail) = &config.abuse_mail {
+        let url = if let Some(req) = req {
+            format!("{host}{path}", host = get_host_url(req), path = req.uri())
+        } else {
+            String::new()
+        };
+        // urlencoding::encode(data)
+        html.replace("{abuse}", ABUSE_SNIPPET_HTML.trim_end())
+            .replace("{abusemail}", abuse_mail)
+            .replace("{url}", &urlencoding::encode(&url))
+    } else {
+        html.replace("{abuse}", "")
+    }
+}
+
+pub fn insert_script_nonce(req: &HttpRequest, html: String) -> String {
+    let extensions = &req.extensions();
+    let script_nonce = extensions.get::<ScriptNonce>().expect("script_nonce available");
+    html.replace("{script_nonce}", &script_nonce.to_string())
+}
+
+fn render_file_size(size: u64) -> String {
+    let magnitude = cmp::min((size as f64).log(1024.0) as u32, 5);
+    let prefix = ["", "ki", "Mi", "Gi", "Ti", "Pi"][magnitude as usize];
+    let value = size / (1024_u64.pow(magnitude));
+    format!("{value}{prefix}B")
+}
+
+fn render_duration(duration: Duration) -> String {
+    let days = duration.whole_days();
+    let hours = duration.whole_hours() % 24;
+    let minutes = duration.whole_minutes() % 60;
+    let seconds = duration.whole_seconds() % 60;
+    let mut elements = vec![];
+    if let Some(name) = pluralize(days, "tag", "e") {
+        elements.push(name);
+    }
+    if let Some(name) = pluralize(hours, "stunde", "n") {
+        elements.push(name);
+    }
+    if let Some(name) = pluralize(minutes, "minute", "n") {
+        elements.push(name);
+    }
+    if let Some(name) = pluralize(seconds, "sekunde", "n") {
+        elements.push(name);
+    }
+    elements.join("+")
+}
+
+fn pluralize(number: i64, word: &str, suffix: &str) -> Option<String> {
+    match number {
+        0 => None,
+        1 => Some(format!("{number} {word}")),
+        _ => Some(format!("{number} {word}{suffix}")),
+    }
+}
+
+fn build_auth_hide_js(config: &Config) -> Option<String> {
+    if let Some(no_auth_limits) = &config.no_auth_limits {
+        let auth_hide_js = AUTH_HIDE_JS
+            .replace(
+                "{no_auth_max_time}",
+                &no_auth_limits.max_time.whole_seconds().to_string(),
+            )
+            .replace(
+                "{no_auth_large_file_max_time}",
+                &no_auth_limits
+                    .large_file_max_time
+                    .whole_seconds()
+                    .to_string(),
+            )
+            .replace(
+                "{no_auth_large_file_size}",
+                &no_auth_limits.large_file_size.to_string(),
+            );
+        Some(auth_hide_js)
+        // Ok(HttpResponse::Ok()
+        //     .content_type("application/javascript")
+        //     .body(auth_hide_js))
+    } else {
+        None
+        // Err(error::ErrorNotFound("file not found"))
+    }
+}
+
+pub fn get_host_url(req: &HttpRequest) -> String {
+    let conn = req.connection_info();
+    format!("{}://{}", conn.scheme(), conn.host())
+}

src/upload.rs

@@ -0,0 +1,125 @@
+use std::io::ErrorKind;
+
+use crate::config::Config;
+use crate::file_info::FileInfo;
+use crate::{file_info, multipart, template};
+use actix_multipart::Multipart;
+use actix_web::http::header::LOCATION;
+use actix_web::{error, web, Error, HttpRequest, HttpResponse};
+use rand::{distributions::Slice, Rng};
+use sqlx::postgres::PgPool;
+use std::path::{Path, PathBuf};
+use tokio::fs::{self, OpenOptions};
+use tokio::sync::mpsc::Sender;
+
+const ID_CHARS: &[char] = &[
+    'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'm', 'n', 'p', 'q', 'r', 's', 't', 'u',
+    'v', 'w', 'x', 'y', 'z', '1', '2', '3', '4', '5', '6', '7', '8', '9',
+];
+
+pub async fn index(req: HttpRequest, config: web::Data<Config>) -> HttpResponse {
+    let index_html = template::build_index_html(&req, &config);
+    HttpResponse::Ok()
+        .content_type("text/html")
+        .body(index_html) 
+}
+
+pub async fn upload(
+    req: HttpRequest,
+    payload: Multipart,
+    db: web::Data<PgPool>,
+    expiry_watch_sender: web::Data<Sender<()>>,
+    config: web::Data<Config>,
+) -> Result<HttpResponse, Error> {
+    let (file_id, file_path) = create_unique_file_id(&config).await.map_err(|file_err| {
+        log::error!("could not create file {:?}", file_err);
+        error::ErrorInternalServerError("could not create file")
+    })?;
+    let upload_config = multipart::parse_multipart(payload, &file_path, &config).await?;
+    let file_info = FileInfo::new(file_id, upload_config);
+
+    create_file(&file_info, &file_path, db).await?;
+
+    expiry_watch_sender.send(()).await.unwrap();
+
+    let redirect = get_redirect_url(&file_info.file_id, file_info.file_name.as_deref());
+    let url = template::get_file_url(&req, &file_info.file_id, file_info.file_name.as_deref());
+    Ok(HttpResponse::SeeOther()
+        .insert_header((LOCATION, redirect))
+        .body(format!("{url}\n")))
+}
+
+async fn create_file(
+    file_info: &FileInfo,
+    file_path: &Path,
+    db: web::Data<sqlx::Pool<sqlx::Postgres>>,
+) -> Result<(), Error> {
+    if let Err(db_err) = file_info::create(file_info, &db).await {
+        log::error!("could not insert into datebase {:?}", db_err);
+
+        if let Err(file_err) = fs::remove_file(file_path).await {
+            log::error!("could not remove file {:?}", file_err);
+        }
+        return Err(error::ErrorInternalServerError(
+            "could not insert file into database",
+        ));
+    }
+    log::info!(
+        "create new file {} (valid_till: {}, content_type: {}, delete_on_download: {})",
+        file_info.file_id,
+        file_info.valid_till,
+        file_info.content_type,
+        file_info.delete_on_download
+    );
+    Ok(())
+}
+
+async fn create_unique_file_id(
+    config: &web::Data<Config>,
+) -> Result<(String, PathBuf), std::io::Error> {
+    loop {
+        let file_id = gen_file_id();
+        let file_path = config.files_dir.join(&file_id);
+        match OpenOptions::new()
+            .write(true)
+            .create_new(true)
+            .open(&file_path)
+            .await
+        {
+            Ok(_) => return Ok((file_id, file_path)),
+            Err(error) if error.kind() == ErrorKind::AlreadyExists => continue,
+            Err(error) => return Err(error),
+        }
+    }
+}
+
+fn gen_file_id() -> String {
+    let distribution = Slice::new(ID_CHARS).expect("ID_CHARS is not empty");
+    rand::thread_rng()
+        .sample_iter(distribution)
+        .take(5)
+        .collect()
+}
+
+fn get_redirect_url(id: &str, name: Option<&str>) -> String {
+    if let Some(name) = name {
+        let encoded_name = urlencoding::encode(name);
+        format!("/upload/{id}/{encoded_name}")
+    } else {
+        format!("/upload/{id}")
+    }
+}
+
+pub async fn uploaded(req: HttpRequest, config: web::Data<Config>) -> Result<HttpResponse, Error> {
+    let id = req.match_info().query("id");
+    let name = req
+        .match_info()
+        .get("name")
+        .map(urlencoding::decode)
+        .transpose()
+        .map_err(|_| error::ErrorBadRequest("name is invalid utf-8"))?;
+    let uploaded_html = template::build_uploaded_html(&req, id, name.as_deref(), &config);
+    Ok(HttpResponse::Ok()
+        .content_type("text/html")
+        .body(uploaded_html))
+}

static/copy.js

@@ -0,0 +1,13 @@
+if (navigator.clipboard) {
+  const buttons = document.querySelectorAll("button[data-copy], a[data-copy]");
+  for (const button of buttons) {
+    button.classList.remove("hidden");
+    button.onclick = () => {
+      const target = document.querySelector(button.getAttribute("data-copy"));
+      navigator.clipboard.writeText(target.textContent).then(
+        (_) => (button.innerText = "kopiert!"),
+        (_) => (button.innerText = "nicht unterstützt")
+      );
+    };
+  }
+}

static/favicon.svg

@@ -0,0 +1,45 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   width="20.039999mm"
+   height="32.470001mm"
+   viewBox="0 0 20.039999 32.470002"
+   version="1.1"
+   id="svg5"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:svg="http://www.w3.org/2000/svg">
+  <defs
+     id="defs2" />
+  <g
+     id="layer1">
+    <path
+       id="path27079"
+       style="fill:#ffffff;stroke:none;stroke-width:0"
+       d="M 0,3.4728255 19.692763,1.0182368e-8 20.04,1.9695374 0.34723656,5.4423629 Z" />
+    <path
+       id="path27076"
+       style="fill:#ffffff;stroke:none;stroke-width:0"
+       d="M 0.42165307,7.3209983 H 19.618346 V 9.3209188 H 0.42165307 Z" />
+    <path
+       id="path27073"
+       style="fill:#ffffff;stroke:none;stroke-width:0"
+       d="M 0.82158379,12.920776 H 19.218416 v 1.99992 H 0.82158379 Z" />
+    <path
+       id="path27070"
+       style="fill:#ffffff;stroke:none;stroke-width:0"
+       d="M 1.2215157,18.520553 H 18.818485 v 1.999921 H 1.2215157 Z" />
+    <path
+       style="fill:#ffffff;fill-opacity:1;fill-rule:nonzero;stroke:none;stroke-width:0;stroke-dasharray:none;paint-order:normal"
+       d="m 6.9813387,24.122065 a 4.999139,4.9998014 0 0 1 2.3095393,1.999798 h 9.129654 v -1.999798 z"
+       id="path27067" />
+    <path
+       id="path27064"
+       style="fill:#ffffff;fill-opacity:1;fill-rule:nonzero;stroke:none;stroke-width:0;stroke-dasharray:none;paint-order:normal"
+       d="M 9.9160553,29.7184 A 4.999139,4.9998014 0 0 1 9.0170401,31.718199 H 18.017524 V 29.7184 Z" />
+    <path
+       id="path27061"
+       style="fill:#ffffff;stroke:none;stroke-width:0"
+       d="M 8.7702156,28.720149 A 3.7493543,3.749851 0 0 1 5.0208613,32.47 3.7493543,3.749851 0 0 1 1.271507,28.720149 3.7493543,3.749851 0 0 1 5.0208613,24.970298 3.7493543,3.749851 0 0 1 8.7702156,28.720149 Z" />
+  </g>
+</svg>

static/index.css

@@ -1,19 +1,51 @@
+:root {
+  --bg: #262824;
+  --bg-alt: #434742;
+  --accent: #007100;
+  --accent-alt: #228b22;
+  --fg: #dfe1de;
+  --fg-light: #afb3ab;
+  --radius: 5px;
+  --separators: 1px;
+  --separators-wide: 2px;
+}
+
+html {
+  box-sizing: border-box;
+}
+
+*,
+*::before,
+*::after {
+  box-sizing: inherit;
+}
+
 body {
-  background-color: #222222;
+  display: flex;
+  flex-direction: column;
+  justify-content: space-between;
+  background-color: var(--bg);
+  min-height: 100vh;
   margin: 0;
+  font-family: sans-serif;
 }
 
 main {
-  color: #dddddd;
-  font-family: sans;
-  max-width: 1200px;
+  color: var(--fg);
+  width: 100%;
+  max-width: 1000px;
   margin: 0 auto;
-  padding: 1rem;
+  padding: 1em;
 }
 
 h1 > a,
 h1 > a:visited {
-  color: #dddddd;
+  color: var(--fg);
+}
+
+.icon {
+  height: 1.2em;
+  margin-left: 0.1em;
 }
 
 a {
@@ -25,24 +57,82 @@ a:visited {
 }
 
 label {
+  display: inline-block;
   margin-right: 0.25em;
+  margin-bottom: 0.5em;
 }
 
 input,
 select,
 textarea,
 .button {
-  background-color: #222222;
-  color: #dddddd;
-  padding: 0.5rem;
-  border: 2px solid #dddddd;
-  border-radius: 5px;
-  margin-bottom: 1rem;
-  max-width: calc(100vw - 3rem - 4px);
+  display: inline-block;
+  background-color: var(--bg-alt);
+  color: var(--fg);
+  padding: 0.5em;
+  border: var(--separators) solid var(--fg-light);
+  border-radius: var(--radius);
+  margin-bottom: 1.5em;
+  max-width: calc(100vw - 2em);
+}
+
+details {
+  display: inline;
+  max-width: 100%;
+}
+
+details > pre {
+  margin: 0;
+  padding: 1rem 0.5rem;
+  overflow-x: scroll;
+}
+
+details summary {
+  cursor: pointer;
+  padding: 0.5em;
+}
+
+details[open] summary {
+  border-bottom: var(--separators) solid var(--fg-light);
+}
+
+input:focus-within,
+select:focus-within,
+textarea:focus-within,
+.button:focus-within,
+details:focus-within,
+a:focus-within {
+  outline: solid cornflowerblue var(--separators);
+  border-radius: var(--radius);
+}
+
+textarea {
+  width: 100%;
+  height: 60vh;
+}
+
+form > textarea {
+  height: 30vh;
+}
+
+.hidden {
+  display: none;
+}
+
+input[type="checkbox"] {
+  margin-top: 0.5em;
+  margin-bottom: 1.5em;
 }
 
 .button {
   cursor: pointer;
+  font-family: sans-serif;
+  font-weight: normal;
+  font-size: 1em;
+  margin-right: 0.5em;
+  margin-top: 1em;
+  user-select: none;
+  border-width: var(--separators-wide);
 }
 
 a.button {
@@ -50,17 +140,68 @@ a.button {
 }
 
 a.button:visited {
-  color: #dddddd;
+  color: var(--fg);
 }
 
 .button:hover {
-  background-color: #444444;
+  background-color: var(--bg-alt);
+  border-color: var(--fg);
 }
 
 .button.main {
-  background-color: green;
+  background-color: var(--accent);
 }
 
 .button.main:hover {
-  background-color: forestgreen;
+  background-color: var(--accent-alt);
+}
+
+.usage {
+  margin-top: 2em;
+  overflow: auto;
+  color: var(--fg-light);
+}
+
+.usage > p {
+  display: flex;
+  flex-direction: column;
+}
+
+.usage > p > label {
+  font-weight: 500;
+}
+
+.usage > p > code {
+  margin-left: 1rem;
+}
+
+.large-link {
+  display: inline-block;
+  margin-bottom: 1em;
+  max-height: 60vh;
+  overflow-y: auto;
+
+  font-size: clamp(1em, 3vw, 1.5em);
+  overflow-wrap: anywhere;
+}
+
+footer {
+  flex-shrink: 0;
+  display: flex;
+  justify-content: flex-end;
+  padding: 0.5em;
+}
+
+footer > * {
+  padding: 0.5em;
+  color: var(--fg-light);
+  text-decoration: none;
+}
+
+footer > *:visited {
+  color: var(--fg-light);
+}
+
+footer > *:hover {
+  color: var(--fg);
 }

static/index.html

@@ -1,36 +0,0 @@
-<!DOCTYPE html>
-<html>
-  <head>
-    <title>datatrash</title>
-    <meta charset="utf-8" />
-    <meta name="viewport" content="width=device-width, initial-scale=1" />
-    <link href="/static/index.css" rel="stylesheet" />
-  </head>
-  <body>
-    <main>
-      <h1>datatrash</h1>
-      <form action="/upload" method="POST" enctype="multipart/form-data">
-        <input type="file" name="content" />
-        <br />
-        <textarea
-          name="text_content"
-          placeholder="Oder asciitrash"
-          rows="20"
-          cols="120"
-        ></textarea>
-        <br />
-        <label for="validity_secs">Gültig für</label>
-        <select id="validity_secs" name="validity_secs">
-          <option value="1800">30 minuten</option>
-          <option value="3600">60 minuten</option>
-          <option value="43200">12 stunden</option>
-          <option value="86400">24 stunden</option>
-          <option value="604800">1 woche</option>
-          <option value="2678400">1 monat</option>
-        </select>
-        <br />
-        <input class="main button" type="submit" value="Hochladen" />
-      </form>
-    </main>
-  </body>
-</html>

static/origin.js

@@ -0,0 +1,4 @@
+const originSpans = document.querySelectorAll(".origin");
+for (const originSpan of originSpans) {
+  originSpan.textContent = window.location.origin;
+}

static/paste.js

@@ -0,0 +1,4 @@
+const fileInput = document.getElementById("file-upload");
+window.addEventListener('paste', e => {
+  fileInput.files = e.clipboardData.files;
+});

template/auth-hide.js

@@ -0,0 +1,38 @@
+const fileUpload = document.getElementById('file-upload');
+const textUpload = document.getElementById('text-upload');
+const keepFor = document.getElementById('keep_for');
+const passwordInput = document.getElementById('password-input');
+
+const maxTime = Number('{no_auth_max_time}');
+const largeFileMaxTime = Number('{no_auth_large_file_max_time}');
+const largeFileSize = Number('{no_auth_large_file_size}');
+
+let keep = Number(keepFor.value);
+let size = fileUpload.files[0]
+  ? fileUpload.files[0].size
+  : textUpload.value.length;
+
+const updatePasswordInput = () => {
+  const requirePassword =
+    keep > maxTime || (size > largeFileSize && keep > largeFileMaxTime);
+  passwordInput.className = requirePassword ? '' : 'hidden';
+};
+
+updatePasswordInput();
+
+fileUpload.addEventListener('change', () => {
+  size = fileUpload.files[0]
+    ? fileUpload.files[0].size
+    : textUpload.value.length;
+  updatePasswordInput();
+});
+textUpload.addEventListener('input', () => {
+  if (!fileUpload.files[0]) {
+    size = textUpload.value.length;
+    updatePasswordInput();
+  }
+});
+keepFor.addEventListener('change', () => {
+  keep = Number(keepFor.value);
+  updatePasswordInput();
+});

template/index.html

@@ -0,0 +1,99 @@
+<!DOCTYPE html>
+<html lang="de-DE">
+  <head>
+    <title>datatrash</title>
+    <meta charset="utf-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1" />
+    <meta name="description" content="Temporärer Dateiaustausch" />
+    <link href="/static/index.css" rel="stylesheet" />
+    <link rel="icon" type="image/svg+xml" href="/static/favicon.svg" />
+    <link
+      rel="icon"
+      type="image/vnd.microsoft.icon"
+      href="/static/favicon.ico"
+    />
+  </head>
+  <body>
+    <main>
+      <h1>datatrash<img src="/static/favicon.svg" class="icon" /></h1>
+      <form action="/upload" method="POST" enctype="multipart/form-data">
+        <label for="file-upload">datei{max_size_snippet}</label>
+        <br />
+        <input id="file-upload" type="file" name="file" />
+        <br />
+        <label for="text-upload">oder asciitrash</label>
+        <br />
+        <textarea id="text-upload" name="text" rows="15" cols="120"></textarea>
+        <br />
+        <input
+          id="delete_on_download"
+          type="checkbox"
+          name="delete_on_download"
+        />
+        <label for="delete_on_download">nach einem download löschen</label>
+        <br />
+        <label for="keep_for">gültig für</label>
+        <select id="keep_for" name="keep_for">
+          <option value="1800">30 minuten</option>
+          <option value="3600">60 minuten</option>
+          <option value="43200">12 stunden</option>
+          <option value="86400">24 stunden</option>
+          <option value="604800">eine woche</option>
+          <option value="2678400">einen monat</option>
+        </select>
+        <br />{auth_snippet}
+        <input class="main button" type="submit" value="hochladen" />
+      </form>
+      <details class="usage">
+        <summary>nutzung als api</summary>
+        <p>
+          <label>datei hochladen</label>
+          <code
+            >curl -F 'file=@yourfile.rs'
+            <span class="origin">&lt;origin&gt;</span>/upload</code
+          >
+        </p>
+        <p>
+          <label>text hochladen</label>
+          <code
+            >curl -F 'text=your text'
+            <span class="origin">&lt;origin&gt;</span>/upload</code
+          >
+        </p>
+        <p>
+          <label>zeitbegrenzung setzen</label>
+          <code
+            >curl -F 'text=your text' -F 'keep_for=1800'
+            <span class="origin">&lt;origin&gt;</span>/upload</code
+          >
+        </p>
+        <p>
+          <label>nach einem download löschen</label>
+          <code
+            >curl -F 'text=your text' -F 'delete_on_download=true'
+            <span class="origin">&lt;origin&gt;</span>/upload</code
+          >
+        </p>
+        <p>
+          <label>authentifizieren</label>
+          <code
+            >curl -F 'text=your text' -F 'password=…'
+            <span class="origin">&lt;origin&gt;</span>/upload</code
+          >
+        </p>
+      </details>
+    </main>
+    <footer>
+      {abuse}
+      <a
+        href="https://git.ctdo.de/neri/datatrash"
+        target="_blank"
+        rel="noopener noreferrer"
+      >
+        repo
+      </a>
+    </footer>
+		<script nonce="{script_nonce}" src="/static/paste.js"></script>
+		<script nonce="{script_nonce}" src="/static/origin.js"></script>
+  </body>
+</html>

template/text-view.html

@@ -0,0 +1,41 @@
+<!DOCTYPE html>
+<html lang="de-DE">
+  <head>
+    <title>datatrash</title>
+    <meta charset="utf-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1" />
+    <link href="/static/index.css" rel="stylesheet" />
+    <link rel="icon" type="image/svg+xml" href="/static/favicon.svg" />
+    <link
+      rel="icon"
+      type="image/vnd.microsoft.icon"
+      href="/static/favicon.ico"
+    />
+  </head>
+  <body>
+    <main>
+      <h1>
+        <a href="/">datatrash<img src="/static/favicon.svg" class="icon" /></a>
+      </h1>
+      {file_name}
+      <textarea id="text" rows="20" cols="120" readonly>{text}</textarea>
+      <br />
+      <a class="main button" href="?dl">herunterladen</a>
+      <button id="copy" data-copy="#text" class="button hidden">
+        text kopieren
+      </button>
+      <a class="button" href="?raw">roh anzeigen</a>
+    </main>
+    <footer>
+      {abuse}
+      <a
+        href="https://git.ctdo.de/neri/datatrash"
+        target="_blank"
+        rel="noopener noreferrer"
+      >
+        repo
+      </a>
+    </footer>
+    <script nonce="{script_nonce}" src="/static/copy.js"></script>
+  </body>
+</html>

template/upload-short.html

@@ -0,0 +1,41 @@
+<!DOCTYPE html>
+<html lang="de-DE">
+  <head>
+    <title>datatrash</title>
+    <meta charset="utf-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1" />
+    <link href="/static/index.css" rel="stylesheet" />
+    <link rel="icon" type="image/svg+xml" href="/static/favicon.svg" />
+    <link
+      rel="icon"
+      type="image/vnd.microsoft.icon"
+      href="/static/favicon.ico"
+    />
+  </head>
+  <body>
+    <main>
+      <h1>
+        <a href="/">datatrash<img src="/static/favicon.svg" class="icon" /></a>
+      </h1>
+      <p>link: <a id="link" href="{link}">{link}</a></p>
+      <p>shortlink: <a id="shortlink" href="{shortlink}">{shortlink}</a></p>
+      <button id="copy" data-copy="#link" class="main button hidden">
+        link kopieren
+      </button>
+      <button id="copy-short" data-copy="#shortlink" class="button hidden">
+        shortlink kopieren
+      </button>
+    </main>
+    <footer>
+      {abuse}
+      <a
+        href="https://git.ctdo.de/neri/datatrash"
+        target="_blank"
+        rel="noopener noreferrer"
+      >
+        repo
+      </a>
+    </footer>
+    <script nonce="{script_nonce}" src="/static/copy.js"></script>
+  </body>
+</html>

template/upload.html

@@ -1,20 +1,37 @@
 <!DOCTYPE html>
-<html>
+<html lang="de-DE">
   <head>
     <title>datatrash</title>
     <meta charset="utf-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1" />
     <link href="/static/index.css" rel="stylesheet" />
+    <link rel="icon" type="image/svg+xml" href="/static/favicon.svg" />
+    <link
+      rel="icon"
+      type="image/vnd.microsoft.icon"
+      href="/static/favicon.ico"
+    />
   </head>
   <body>
     <main>
-      <h1><a href="/">datatrash</a></h1>
-      <p>
-        Datei-Link:
-        <a href="{url}">
-          {url}
-        </a>
-      </p>
+      <h1>
+        <a href="/">datatrash<img src="/static/favicon.svg" class="icon" /></a>
+      </h1>
+      <p>link: <a id="link" href="{link}">{link}</a></p>
+      <button id="copy" data-copy="#link" class="main button hidden">
+        link kopieren
+      </button>
     </main>
+    <footer>
+      {abuse}
+      <a
+        href="https://git.ctdo.de/neri/datatrash"
+        target="_blank"
+        rel="noopener noreferrer"
+      >
+        repo
+      </a>
+    </footer>
+    <script nonce="{script_nonce}" src="/static/copy.js"></script>
   </body>
 </html>

template/url-view.html

@@ -0,0 +1,49 @@
+<!DOCTYPE html>
+<html lang="de-DE">
+  <head>
+    <title>datatrash</title>
+    <meta charset="utf-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1" />
+    <link href="/static/index.css" rel="stylesheet" />
+    <link rel="icon" type="image/svg+xml" href="/static/favicon.svg" />
+    <link
+      rel="icon"
+      type="image/vnd.microsoft.icon"
+      href="/static/favicon.ico"
+    />
+  </head>
+  <body>
+    <main>
+      <h1>
+        <a href="/">datatrash<img src="/static/favicon.svg" class="icon" /></a>
+      </h1>
+      <a
+        id="link"
+        class="large-link"
+        href="{link_attribute}"
+        rel="noopener noreferrer"
+        >{link_content}</a
+      >
+      <br />
+      <a class="main button" href="{link_attribute}" rel="noopener noreferrer">
+        link öffnen
+      </a>
+      <button id="copy" data-copy="#link" class="button hidden">
+        link kopieren
+      </button>
+      <a class="button" href="?dl">als text herunterladen</a>
+      <a class="button" href="?raw">roh anzeigen</a>
+    </main>
+    <footer>
+      {abuse}
+      <a
+        href="https://git.ctdo.de/neri/datatrash"
+        target="_blank"
+        rel="noopener noreferrer"
+      >
+        repo
+      </a>
+    </footer>
+    <script nonce="{script_nonce}" src="/static/copy.js"></script>
+  </body>
+</html>

template/view.html

@@ -1,34 +0,0 @@
-<!DOCTYPE html>
-<html>
-  <head>
-    <title>datatrash</title>
-    <meta charset="utf-8" />
-    <meta name="viewport" content="width=device-width, initial-scale=1" />
-    <link href="/static/index.css" rel="stylesheet" />
-  </head>
-  <body>
-    <main>
-      <h1><a href="/">datatrash</a></h1>
-      <textarea id="text" rows="20" cols="120" readonly>{text}</textarea>
-      <br />
-      <a class="main button" href="?raw">Herunterladen</a>
-      <button id="copy" class="button" onclick="copyToClipboard()">
-        Text kopieren
-      </button>
-    </main>
-    <script lang="javascript">
-      function copyToClipboard() {
-        const button = document.getElementById("copy");
-        if (!navigator.clipboard) {
-          button.innerText = "Nicht unterstützt";
-          return;
-        }
-        const textarea = document.getElementById("text");
-        navigator.clipboard.writeText(textarea.value).then(
-          _ => { button.innerText = "Kopiert!"; },
-          _ => { button.innerText = "Nicht unterstützt"; },
-        );
-      }
-    </script>
-  </body>
-</html>