PlayStream/playstreamproxy0.py

#!/usr/bin/python

""" Livestreamer Deamon """

import os
import sys
import time
import atexit
import re

from signal import SIGTERM

from BaseHTTPServer import HTTPServer, BaseHTTPRequestHandler
from SocketServer import ThreadingMixIn
#from livestreamer import Livestreamer
from urllib import unquote, quote
import urllib,urlparse
import requests
from requests.packages.urllib3.exceptions import InsecureRequestWarning
requests.packages.urllib3.disable_warnings(InsecureRequestWarning)


HOST_NAME = ""
PORT_NUMBER = 88
LIVESTREAMER = None

headers2dict = lambda  h: dict([l.strip().split(": ") for l in h.strip().splitlines()])
sessions = {}

class StreamHandler(BaseHTTPRequestHandler):

    def do_HEAD(self):
        self.send_response(200)
        self.send_header("Server", "StreamProxy")
        self.send_header("Content-type", "text/html")
        self.end_headers()

    def do_GET(self):
        """Respond to a GET request."""
        #self.send_header("Connection", "keep-alive")
        #Content-Type: video/mp4
        #self.end_headers()
        # http://localhost:88/hls?u=url.com/aaa/bbb.m3u8&h=headers&d=data
        # http://localhost:88/http://walterebert.com/playground/video/hls/ts/480x270.m3u8?token=xxxx|User-Agent=Enigma2|Cookie=xxxxx
        p = self.path.split("~")
        url = urllib.unquote(p[0][1:])
        headers = headers2dict("""
        User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.71 Safari/537.36
        """)
        
        if len(p)>1:
            for h in p[1:]:
                headers[h.split("=")[0]]=urllib.unquote(h.split("=")[1])
        #self.fetch_offline(self.wfile)
        try:
            self.fetch_url(self.wfile, url, headers)
        except Exception as e:
            print "Got Exception: ", str(e)
        
    def fetch_offline(self,wfile):
        self.send_response(200)
        self.send_header("Server", "StreamProxy")
        self.send_header("Content-type", "video/mp4")
        self.end_headers()
        self.wfile.write(open("offline.mp4", "rb").read())
        self.wfile.close()
        
    
    def fetch_url(self, wfile, url, headers):
        self.log_message("fetch_url: %s", url)
        #self.log_message("headers: %s", headers)
        
        
        base_url = "/".join(url.split("/")[0:-1])
        if base_url not in sessions:
            sessions[base_url] = requests.Session()
        sessions[base_url].headers.update(headers)
        #print "request headers: ",sessions[base_url].headers        
        r = sessions[base_url].get(url, stream=True,verify=False)
        self.send_response(int(r.status_code))
        self.send_header("Content-Type",r.headers["Content-Type"])
        for h in r.headers:
            if h in ("Content-Type","Server","Set-Cookie"):continue
            self.send_header(h, r.headers[h])
            #print h,"=",r.headers[h]
        self.end_headers()
        if r.status_code == 200:
            for chunk in r.iter_content(4096):
                try:
                    wfile.write(chunk) 
                except Exception as e:
                    print "Exception: ", str(e)
                    pass
                #print ".",
            #self.wfile.close()
            #print "  url streaming finished"
            
        else:
            self.send_response(200)
  
class ThreadedHTTPServer(ThreadingMixIn, HTTPServer):
    """Handle requests in a separate thread."""

def start():
    #global LIVESTREAMER
    #LIVESTREAMER = Livestreamer()
    httpd = ThreadedHTTPServer((HOST_NAME, PORT_NUMBER), StreamHandler)
    print time.asctime(), "Server Starts - %s:%s" % (HOST_NAME, PORT_NUMBER)
    try:
        httpd.serve_forever()
    except KeyboardInterrupt:
        pass
    httpd.server_close()
    print time.asctime(), "Server Stops - %s:%s" % (HOST_NAME, PORT_NUMBER)


class Daemon:
    """
    A generic daemon class.
    Usage: subclass the Daemon class and override the run() method
    """
    def __init__(self, pidfile, stdin="/dev/null", stdout="/dev/null", stderr="/dev/null"):
        self.stdin = stdin
        self.stdout = stdout
        self.stderr = stderr
        self.pidfile = pidfile

    def daemonize(self):
        """
        do the UNIX double-fork magic, see Stevens' "Advanced 
        Programming in the UNIX Environment" for details (ISBN 0201563177)
        http://www.erlenstar.demon.co.uk/unix/faq_2.html#SEC16
        """
        try: 
            pid = os.fork() 
            if pid > 0:
                # exit first parent
                sys.exit(0) 
        except OSError, e: 
            sys.stderr.write("fork #1 failed: %d (%s)\n" % (e.errno, e.strerror))
            sys.exit(1)

        # decouple from parent environment
        os.chdir("/") 
        os.setsid() 
        os.umask(0) 

        # do second fork
        try: 
            pid = os.fork() 
            if pid > 0:
                # exit from second parent
                sys.exit(0) 
        except OSError, e: 
            sys.stderr.write("fork #2 failed: %d (%s)\n" % (e.errno, e.strerror))
            sys.exit(1) 

        # redirect standard file descriptors
        sys.stdout.flush()
        sys.stderr.flush()
        si = file(self.stdin, "r")
        so = file(self.stdout, "a+")
        se = file(self.stderr, "a+", 0)
        os.dup2(si.fileno(), sys.stdin.fileno())
        os.dup2(so.fileno(), sys.stdout.fileno())
        os.dup2(se.fileno(), sys.stderr.fileno())

        # write pidfile
        atexit.register(self.delpid)
        pid = str(os.getpid())
        file(self.pidfile,"w+").write("%s\n" % pid)

    def delpid(self):
        os.remove(self.pidfile)

    def start(self):
        """
        Start the daemon
        """
        # Check for a pidfile to see if the daemon already runs
        try:
            pf = file(self.pidfile,"r")
            pid = int(pf.read().strip())
            pf.close()
        except IOError:
            pid = None

        if pid:
            message = "pidfile %s already exist. Daemon already running?\n"
            sys.stderr.write(message % self.pidfile)
            sys.exit(1)

        # Start the daemon
        self.daemonize()
        self.run()

    def stop(self):
        """
        Stop the daemon
        """
        # Get the pid from the pidfile
        try:
            pf = file(self.pidfile,"r")
            pid = int(pf.read().strip())
            pf.close()
        except IOError:
            pid = None

        if not pid:
            message = "pidfile %s does not exist. Daemon not running?\n"
            sys.stderr.write(message % self.pidfile)
            return # not an error in a restart

        # Try killing the daemon process	
        try:
            while 1:
                os.kill(pid, SIGTERM)
                time.sleep(0.1)
        except OSError, err:
            err = str(err)
            if err.find("No such process") > 0:
                if os.path.exists(self.pidfile):
                    os.remove(self.pidfile)
            else:
                print str(err)
                sys.exit(1)

    def restart(self):
        """
        Restart the daemon
        """
        self.stop()
        self.start()

    def run(self):
        """
        You should override this method when you subclass Daemon. It will be called after the process has been
        daemonized by start() or restart().
        """


class ProxyDaemon(Daemon):
    def run(self):
        start()

if __name__ == "__main__":
    daemon = ProxyDaemon("/var/run/streamproxy.pid")
    if len(sys.argv) == 2:
        if "start" == sys.argv[1]:
            daemon.start()
        elif "stop" == sys.argv[1]:
            daemon.stop()
        elif "restart" == sys.argv[1]:
            daemon.restart()
        elif "manualstart" == sys.argv[1]:
            start()
        else:
            print "Unknown command"
            sys.exit(2)
        sys.exit(0)
    else:
        print "usage: %s start|stop|restart|manualstart" % sys.argv[0]
        sys.exit(2)