consolidate mjpeg streaming server using qtnetwork into a reusable class
This commit is contained in:
Stefan Kögl
parent
f3477757c2
commit
05745e3c52
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#!/usr/bin/python
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# -*- coding: utf-8 -*-
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# This file is part of chaosc and psychosis
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#
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# chaosc/psychosis is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# chaosc/psychosis is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with chaosc/psychosis. If not, see <http://www.gnu.org/licenses/>.
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#
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# Copyright (C) 2014 Stefan Kögl
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from __future__ import absolute_import
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import os
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import os.path
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import re
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import sys
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from datetime import datetime
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from chaosc.argparser_groups import *
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from chaosc.lib import logger, resolve_host
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from PyQt4 import QtCore, QtGui
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from PyQt4.QtCore import QBuffer, QByteArray, QIODevice
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from PyQt4.QtNetwork import QTcpServer, QTcpSocket
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class MjpegStreamingServer(QTcpServer):
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def __init__(self, server_address, parent=None):
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super(MjpegStreamingServer, self).__init__(parent)
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self.server_address = server_address
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self.newConnection.connect(self.new_connection)
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self.widget = parent
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self.sockets = list()
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self.img_data = None
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self.timer = QtCore.QTimer()
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self.timer.timeout.connect(self.send_image)
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self.timer.start(80)
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self.stream_clients = list()
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self.get_regex = re.compile("^GET /(\w+?)\.(\w+?) HTTP/(\d+\.\d+)$")
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self.host_regex = re.compile("^Host: (\w+?):(\d+)$")
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self.html_map = dict()
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def handle_request(self):
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sock = self.sender()
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logger.info("handle_request: %s %d", sock.peerAddress(), sock.peerPort())
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sock_id = id(sock)
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if sock.state() in (QTcpSocket.UnconnectedState, QTcpSocket.ClosingState):
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logger.info("connection closed")
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self.sockets.remove(sock)
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sock.deleteLater()
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return
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client_data = str(sock.readAll())
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logger.info("request %r", client_data)
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line = client_data.split("\r\n")[0]
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logger.info("first line: %r", line)
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try:
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resource, ext, http_version = self.get_regex.match(line).groups()
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logger.info("resource=%r, ext=%r, http_version=%r", resource, ext, http_version)
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except AttributeError:
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try:
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host, port = self.host_regex.match(line).groups()
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logger.info("found host header %r %r", host, port)
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#return
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#sock.write("HTTP/1.1 501 Not Implemented\r\n")
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return
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except AttributeError:
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logger.info("no matching request - sending 404 not found")
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sock.write("HTTP/1.1 404 Not Found\r\n")
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return
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else:
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if ext == "ico":
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directory = os.path.dirname(os.path.abspath(__file__))
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data = open(os.path.join(directory, "favicon.ico"), "rb").read()
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sock.write(QByteArray('HTTP/1.1 200 Ok\r\nContent-Type: image/x-ico\r\n\r\n%s' % data))
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elif ext == "html":
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directory = os.path.dirname(os.path.abspath(__file__))
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data = open(os.path.join(directory, "index.html"), "rb").read() % sock_id
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self.html_map[sock_id] = None
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sock.write(QByteArray('HTTP/1.1 200 Ok\r\nContent-Type: text/html;encoding: utf-8\r\n\r\n%s' % data))
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elif ext == "mjpeg":
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try:
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_, html_sock_id = resource.split("_", 1)
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html_sock_id = int(html_sock_id)
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except ValueError:
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html_sock_id = None
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if sock not in self.stream_clients:
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logger.info("starting streaming...")
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if html_sock_id is not None:
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self.html_map[html_sock_id] = sock
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self.stream_clients.append(sock)
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sock.write(QByteArray('HTTP/1.1 200 Ok\r\nContent-Type: multipart/x-mixed-replace; boundary=--2342\r\n\r\n'))
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else:
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logger.error("request not found/handled - sending 404 not found")
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sock.write("HTTP/1.1 404 Not Found\r\n")
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def slot_remove_connection(self):
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try:
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sock = self.sender()
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except RuntimeError:
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return
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if sock.state() == QTcpSocket.UnconnectedState:
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self.__remove_connection(sock)
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def __remove_connection(self, sock):
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sock_id = id(sock)
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sock.disconnected.disconnect(self.slot_remove_connection)
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sock.close()
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sock.deleteLater()
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self.sockets.remove(sock)
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logger.info("connection removed: sock=%r, sock_id=%r", sock, sock_id)
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try:
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self.stream_clients.remove(sock)
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except ValueError:
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pass
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try:
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stream_client = self.html_map.pop(sock_id)
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except KeyError:
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logger.info("socket has no child socket")
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else:
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stream_client.close()
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try:
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self.stream_clients.remove(stream_client)
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logger.info("removed stream_client=%r", id(stream_client))
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except ValueError:
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pass
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try:
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self.sockets.remove(stream_client)
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logger.info("removed child sock_id=%r", id(stream_client))
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except ValueError:
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pass
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def send_image(self):
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if not self.stream_clients:
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return
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img_data = self.widget.render_image()
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len_data = len(img_data)
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array = QByteArray("--2342\r\nContent-Type: image/jpeg\r\nContent-length: %d\r\n\r\n%s\r\n\r\n\r\n" % (len_data, img_data))
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for sock in self.stream_clients:
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sock.write(array)
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def new_connection(self):
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while self.hasPendingConnections():
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sock = self.nextPendingConnection()
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logger.info("new connection=%r", id(sock))
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sock.readyRead.connect(self.handle_request)
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sock.disconnected.connect(self.slot_remove_connection)
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self.sockets.append(sock)
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def stop(self):
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self.stream_clients = list()
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self.sockets = list()
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self.html_map = dict()
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self.close()
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@ -0,0 +1,164 @@
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#!/usr/bin/python
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# -*- coding: utf-8 -*-
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# This file is part of chaosc and psychosis
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#
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# chaosc/psychosis is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# chaosc/psychosis is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with chaosc/psychosis. If not, see <http://www.gnu.org/licenses/>.
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#
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# Copyright (C) 2014 Stefan Kögl
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from __future__ import absolute_import
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import os
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import os.path
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import re
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import sys
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from datetime import datetime
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from chaosc.argparser_groups import *
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from chaosc.lib import logger, resolve_host
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from PyQt4 import QtCore, QtGui
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from PyQt4.QtCore import QBuffer, QByteArray, QIODevice
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from PyQt4.QtNetwork import QTcpServer
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class MjpegStreamingServer(QTcpServer):
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def __init__(self, server_address, parent=None):
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super(MjpegStreamingServer, self).__init__(parent)
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self.server_address = server_address
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self.newConnection.connect(self.new_connection)
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self.widget = parent
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self.win_id = self.widget.winId()
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self.sockets = list()
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self.img_data = None
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self.timer = QtCore.QTimer()
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self.timer.timeout.connect(self.render_image)
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self.timer.start(80)
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self.stream_clients = list()
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self.get_regex = re.compile("^GET /(\w+?)\.(\w+?) HTTP/(\d+\.\d+)$")
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self.host_regex = re.compile("^Host: (\w+?):(\d+)$")
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self.html_map = dict()
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def handle_request(self):
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sock = self.sender()
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logger.info("handle_request: %s %d", sock.peerAddress(), sock.peerPort())
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sock_id = id(sock)
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if sock.state() in (QTcpSocket.UnconnectedState, QTcpSocket.ClosingState):
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logger.info("connection closed")
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self.sockets.remove(sock)
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sock.deleteLater()
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return
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client_data = str(sock.readAll())
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logger.info("request %r", client_data)
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line = client_data.split("\r\n")[0]
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logger.info("first line: %r", line)
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try:
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resource, ext, http_version = self.get_regex.match(line).groups()
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logger.info("resource=%r, ext=%r, http_version=%r", resource, ext, http_version)
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except AttributeError:
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try:
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host, port = self.host_regex.match(line).groups()
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print "found host header", host, port
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return
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#sock.write("HTTP/1.1 501 Not Implemented\r\n")
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except AttributeError:
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logger.info("no matching request - sending 404 not found")
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sock.write("HTTP/1.1 404 Not Found\r\n")
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return
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else:
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if ext == "ico":
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directory = os.path.dirname(os.path.abspath(__file__))
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data = open(os.path.join(directory, "favicon.ico"), "rb").read()
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sock.write(QByteArray('HTTP/1.1 200 Ok\r\nContent-Type: image/x-ico\r\n\r\n%s' % data))
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elif ext == "html":
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directory = os.path.dirname(os.path.abspath(__file__))
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data = open(os.path.join(directory, "index.html"), "rb").read() % sock_id
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self.html_map[sock_id] = None
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sock.write(QByteArray('HTTP/1.1 200 Ok\r\nContent-Type: text/html;encoding: utf-8\r\n\r\n%s' % data))
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elif ext == "mjpeg":
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try:
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_, html_sock_id = resource.split("_", 1)
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html_sock_id = int(html_sock_id)
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except ValueError:
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html_sock_id = None
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if sock not in self.stream_clients:
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logger.info("starting streaming...")
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if html_sock_id is not None:
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self.html_map[html_sock_id] = sock
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self.stream_clients.append(sock)
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sock.write(QByteArray('HTTP/1.1 200 Ok\r\nContent-Type: multipart/x-mixed-replace; boundary=--2342\r\n\r\n'))
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else:
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logger.error("request not found/handled - sending 404 not found")
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sock.write("HTTP/1.1 404 Not Found\r\n")
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def remove_connection(self):
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try:
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sock = self.sender()
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except RuntimeError:
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return
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sock_id = id(sock)
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logger.info("remove_connection: sock=%r, sock_id=%r", sock, sock_id)
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if sock.state() == QTcpSocket.UnconnectedState:
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sock.disconnected.disconnect(self.remove_connection)
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self.sockets.remove(sock)
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logger.info("removed sock_id=%r", sock_id)
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sock.close()
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try:
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self.stream_clients.remove(sock)
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except ValueError:
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pass
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try:
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stream_client = self.html_map.pop(sock_id)
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except KeyError:
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logger.info("socket has no child socket")
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else:
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stream_client.close()
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try:
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self.stream_clients.remove(stream_client)
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logger.info("removed stream_client=%r", id(stream_client))
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except ValueError:
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pass
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try:
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self.sockets.remove(stream_client)
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logger.info("removed child sock_id=%r", id(stream_client))
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except ValueError:
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pass
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def render_image(self):
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if not self.stream_clients:
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return
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img_data = self.widget.render_image()
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len_data = len(img_data)
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array = QByteArray("--2342\r\nContent-Type: image/jpeg\r\nContent-length: %d\r\n\r\n%s\r\n\r\n\r\n" % (len_data, img_data))
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for sock in self.stream_clients:
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sock.write(array)
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def new_connection(self):
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while self.hasPendingConnections():
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sock = self.nextPendingConnection()
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logger.info("new connection=%r", id(sock))
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sock.readyRead.connect(self.handle_request)
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sock.disconnected.connect(self.remove_connection)
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self.sockets.append(sock)
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def stop(self):
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self.stream_clients = list()
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self.sockets = list()
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self.html_map = dict()
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self.close()
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@ -0,0 +1,43 @@
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#!/usr/bin/python
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# -*- coding: utf-8 -*-
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from distribute_setup import use_setuptools
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use_setuptools()
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import sys
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from setuptools import find_packages, setup
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if sys.version_info >= (3,):
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extras['use_2to3'] = True
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setup(
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name='psylib',
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version="0.1",
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packages=find_packages(exclude=["scripts",]),
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include_package_data = True,
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exclude_package_data = {'': ['.gitignore']},
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zip_safe = False,
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# pypi metadata
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author = "Stefan Kögl",
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# FIXME: add author email
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author_email = "hotte@ctdo.de",
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description = "library for psychosis",
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# FIXME: add long_description
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long_description = """
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""",
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# FIXME: add license
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license = "GPL",
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# FIXME: add keywords
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keywords = "",
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# FIXME: add download url
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url = "",
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)
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