528 lines
21 KiB
C++
528 lines
21 KiB
C++
/// \file conn_http.cpp
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/// Contains the main code for the HTTP Connector
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#include <iostream>
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#include <queue>
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#include <cstdlib>
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#include <cstdio>
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#include <cmath>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <getopt.h>
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#include <set>
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#include <mist/socket.h>
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#include <mist/http_parser.h>
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#include <mist/config.h>
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#include <mist/stream.h>
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#include <mist/timing.h>
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#include <mist/auth.h>
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#include "tinythread.h"
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#include "embed.js.h"
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/// Holds everything unique to HTTP Connector.
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namespace Connector_HTTP {
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/// Class for keeping track of connections to connectors.
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class ConnConn{
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public:
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Socket::Connection * conn; ///< The socket of this connection
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unsigned int lastuse; ///< Seconds since last use of this connection.
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tthread::mutex in_use; ///< Mutex for this connection.
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/// Constructor that sets the socket and lastuse to 0.
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ConnConn(){
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conn = 0;
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lastuse = 0;
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}
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;
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/// Constructor that sets lastuse to 0, but socket to s.
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ConnConn(Socket::Connection * s){
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conn = s;
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lastuse = 0;
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}
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;
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/// Destructor that deletes the socket if non-null.
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~ConnConn(){
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if (conn){
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conn->close();
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delete conn;
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}
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conn = 0;
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}
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;
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};
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std::map<std::string, ConnConn *> connconn; ///< Connections to connectors
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std::set<tthread::thread *> active_threads; ///< Holds currently active threads
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std::set<tthread::thread *> done_threads; ///< Holds threads that are done and ready to be joined.
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tthread::mutex thread_mutex; ///< Mutex for adding/removing threads.
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tthread::mutex conn_mutex; ///< Mutex for adding/removing connector connections.
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tthread::mutex timeout_mutex; ///< Mutex for timeout thread.
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tthread::thread * timeouter = 0; ///< Thread that times out connections to connectors.
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void Timeout_Thread(void * n){
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n = 0; //prevent unused variable warning
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tthread::lock_guard<tthread::mutex> guard(timeout_mutex);
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while (true){
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{
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tthread::lock_guard<tthread::mutex> guard(conn_mutex);
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if (connconn.empty()){
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return;
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}
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std::map<std::string, ConnConn*>::iterator it;
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for (it = connconn.begin(); it != connconn.end(); it++){
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if ( !it->second->conn->connected() || it->second->lastuse++ > 15){
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if (it->second->in_use.try_lock()){
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it->second->in_use.unlock();
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delete it->second;
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connconn.erase(it);
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it = connconn.begin(); //get a valid iterator
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if (it == connconn.end()){
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return;
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}
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}
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}
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}
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conn_mutex.unlock();
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}
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usleep(1000000); //sleep 1 second and re-check
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}
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}
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/// Handles requests without associated handler, displaying a nice friendly error message.
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long long int Handle_None(HTTP::Parser & H, Socket::Connection * conn){
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H.Clean();
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H.SetHeader("Server", "mistserver/" PACKAGE_VERSION "/" + Util::Config::libver);
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H.SetBody(
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"<!DOCTYPE html><html><head><title>Unsupported Media Type</title></head><body><h1>Unsupported Media Type</h1>The server isn't quite sure what you wanted to receive from it.</body></html>");
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long long int ret = Util::getMS();
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conn->SendNow(H.BuildResponse("415", "Unsupported Media Type"));
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return ret;
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}
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long long int Handle_Timeout(HTTP::Parser & H, Socket::Connection * conn){
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H.Clean();
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H.SetHeader("Server", "mistserver/" PACKAGE_VERSION "/" + Util::Config::libver);
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H.SetBody(
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"<!DOCTYPE html><html><head><title>Gateway timeout</title></head><body><h1>Gateway timeout</h1>Though the server understood your request and attempted to handle it, somehow handling it took longer than it should. Your request has been cancelled - please try again later.</body></html>");
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long long int ret = Util::getMS();
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conn->SendNow(H.BuildResponse("504", "Gateway Timeout"));
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return ret;
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}
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/// Handles internal requests.
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long long int Handle_Internal(HTTP::Parser & H, Socket::Connection * conn){
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std::string url = H.getUrl();
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if (url == "/crossdomain.xml"){
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H.Clean();
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H.SetHeader("Content-Type", "text/xml");
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H.SetHeader("Server", "mistserver/" PACKAGE_VERSION "/" + Util::Config::libver);
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H.SetBody(
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"<?xml version=\"1.0\"?><!DOCTYPE cross-domain-policy SYSTEM \"http://www.adobe.com/xml/dtds/cross-domain-policy.dtd\"><cross-domain-policy><allow-access-from domain=\"*\" /><site-control permitted-cross-domain-policies=\"all\"/></cross-domain-policy>");
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long long int ret = Util::getMS();
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conn->SendNow(H.BuildResponse("200", "OK"));
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return ret;
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} //crossdomain.xml
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if (url == "/clientaccesspolicy.xml"){
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H.Clean();
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H.SetHeader("Content-Type", "text/xml");
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H.SetHeader("Server", "mistserver/" PACKAGE_VERSION "/" + Util::Config::libver);
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H.SetBody(
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"<?xml version=\"1.0\" encoding=\"utf-8\"?><access-policy><cross-domain-access><policy><allow-from http-methods=\"*\" http-request-headers=\"*\"><domain uri=\"*\"/></allow-from><grant-to><resource path=\"/\" include-subpaths=\"true\"/></grant-to></policy></cross-domain-access></access-policy>");
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long long int ret = Util::getMS();
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conn->SendNow(H.BuildResponse("200", "OK"));
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return ret;
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} //clientaccesspolicy.xml
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// send logo icon
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if (url.length() > 4 && url.substr(url.length() - 4, 4) == ".ico"){
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H.Clean();
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#include "icon.h"
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H.SetHeader("Content-Type", "image/x-icon");
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H.SetHeader("Server", "mistserver/" PACKAGE_VERSION "/" + Util::Config::libver);
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H.SetHeader("Content-Length", icon_len);
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H.SetBody("");
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long long int ret = Util::getMS();
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conn->SendNow(H.BuildResponse("200", "OK"));
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conn->SendNow((const char*)icon_data, icon_len);
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return ret;
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}
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if ((url.length() > 9 && url.substr(0, 6) == "/info_" && url.substr(url.length() - 3, 3) == ".js")
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|| (url.length() > 10 && url.substr(0, 7) == "/embed_" && url.substr(url.length() - 3, 3) == ".js")){
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std::string streamname;
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if (url.substr(0, 6) == "/info_"){
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streamname = url.substr(6, url.length() - 9);
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}else{
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streamname = url.substr(7, url.length() - 10);
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}
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Util::Stream::sanitizeName(streamname);
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JSON::Value ServConf = JSON::fromFile("/tmp/mist/streamlist");
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std::string response;
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std::string host = H.GetHeader("Host");
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if (host.find(':')){
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host.resize(host.find(':'));
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}
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H.Clean();
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H.SetHeader("Server", "mistserver/" PACKAGE_VERSION "/" + Util::Config::libver);
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H.SetHeader("Content-Type", "application/javascript");
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response = "// Generating info code for stream " + streamname + "\n\nif (!mistvideo){var mistvideo = {};}\n";
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JSON::Value json_resp;
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if (ServConf["streams"].isMember(streamname) && ServConf["config"]["protocols"].size() > 0){
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json_resp["width"] = ServConf["streams"][streamname]["meta"]["video"]["width"].asInt();
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json_resp["height"] = ServConf["streams"][streamname]["meta"]["video"]["height"].asInt();
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//first, see if we have RTMP working and output all the RTMP.
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for (JSON::ArrIter it = ServConf["config"]["protocols"].ArrBegin(); it != ServConf["config"]["protocols"].ArrEnd(); it++){
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if (( *it)["connector"].asString() == "RTMP"){
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JSON::Value tmp;
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tmp["type"] = "rtmp";
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tmp["url"] = "rtmp://" + host + ":" + ( *it)["port"].asString() + "/play/" + streamname;
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json_resp["source"].append(tmp);
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}
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}
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//then, see if we have HTTP working and output all the dynamic.
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for (JSON::ArrIter it = ServConf["config"]["protocols"].ArrBegin(); it != ServConf["config"]["protocols"].ArrEnd(); it++){
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if (( *it)["connector"].asString() == "HTTP"){
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JSON::Value tmp;
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tmp["type"] = "f4v";
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tmp["url"] = "http://" + host + ":" + ( *it)["port"].asString() + "/" + streamname + "/manifest.f4m";
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json_resp["source"].append(tmp);
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}
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}
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//and all the progressive.
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for (JSON::ArrIter it = ServConf["config"]["protocols"].ArrBegin(); it != ServConf["config"]["protocols"].ArrEnd(); it++){
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if (( *it)["connector"].asString() == "HTTP"){
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JSON::Value tmp;
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tmp["type"] = "flv";
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tmp["url"] = "http://" + host + ":" + ( *it)["port"].asString() + "/" + streamname + ".flv";
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json_resp["source"].append(tmp);
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}
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}
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}else{
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json_resp["error"] = "The specified stream is not available on this server.";
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json_resp["bbq"] = "sauce"; //for legacy purposes ^_^
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}
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response += "mistvideo['" + streamname + "'] = " + json_resp.toString() + ";\n";
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if (url.substr(0, 6) != "/info_" && !json_resp.isMember("error")){
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response.append("\n(");
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response.append((char*)embed_js, (size_t)embed_js_len - 2); //remove trailing ";\n" from xxd conversion
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response.append("(\"" + streamname + "\"));\n");
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}
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H.SetBody(response);
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long long int ret = Util::getMS();
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conn->SendNow(H.BuildResponse("200", "OK"));
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return ret;
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} //embed code generator
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return Handle_None(H, conn); //anything else doesn't get handled
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}
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/// Handles requests without associated handler, displaying a nice friendly error message.
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long long int Handle_Through_Connector(HTTP::Parser & H, Socket::Connection * conn, std::string & connector){
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//create a unique ID based on a hash of the user agent and host, followed by the stream name and connector
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std::string uid = Secure::md5(H.GetHeader("User-Agent") + conn->getHost()) + "_" + H.GetVar("stream") + "_" + connector;
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H.SetHeader("X-Stream", H.GetVar("stream"));
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H.SetHeader("X-UID", uid); //add the UID to the headers before copying
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H.SetHeader("X-Origin", conn->getHost()); //add the UID to the headers before copying
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std::string request = H.BuildRequest(); //copy the request for later forwarding to the connector
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std::string orig_url = H.getUrl();
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H.Clean();
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//check if a connection exists, and if not create one
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conn_mutex.lock();
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if ( !connconn.count(uid) || !connconn[uid]->conn->connected()){
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if (connconn.count(uid)){
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connconn.erase(uid);
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}
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connconn[uid] = new ConnConn(new Socket::Connection("/tmp/mist/http_" + connector));
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connconn[uid]->conn->setBlocking(false); //do not block on spool() with no data
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#if DEBUG >= 4
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std::cout << "Created new connection " << uid << std::endl;
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#endif
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}else{
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#if DEBUG >= 5
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std::cout << "Re-using connection " << uid << std::endl;
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#endif
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}
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//start a new timeout thread, if neccesary
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if (timeout_mutex.try_lock()){
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if (timeouter){
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timeouter->join();
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delete timeouter;
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}
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timeouter = new tthread::thread(Connector_HTTP::Timeout_Thread, 0);
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timeout_mutex.unlock();
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}
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conn_mutex.unlock();
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//lock the mutex for this connection, and handle the request
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tthread::lock_guard<tthread::mutex> guard(connconn[uid]->in_use);
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//if the server connection is dead, handle as timeout.
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if ( !connconn.count(uid) || !connconn[uid]->conn->connected()){
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connconn[uid]->conn->close();
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return Handle_Timeout(H, conn);
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}
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//forward the original request
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connconn[uid]->conn->SendNow(request);
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connconn[uid]->lastuse = 0;
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unsigned int timeout = 0;
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unsigned int retries = 0;
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//wait for a response
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while (connconn.count(uid) && connconn[uid]->conn->connected() && conn->connected()){
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conn->spool();
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if (connconn[uid]->conn->Received().size() || connconn[uid]->conn->spool()){
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//make sure we end in a \n
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if ( *(connconn[uid]->conn->Received().get().rbegin()) != '\n'){
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std::string tmp = connconn[uid]->conn->Received().get();
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connconn[uid]->conn->Received().get().clear();
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if (connconn[uid]->conn->Received().size()){
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connconn[uid]->conn->Received().get().insert(0, tmp);
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}else{
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connconn[uid]->conn->Received().append(tmp);
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}
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}
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//check if the whole response was received
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if (H.Read(connconn[uid]->conn->Received().get())){
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//208 means the fragment is too new, retry in 2000ms
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if (H.url == "208"){
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retries++;
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if (retries >= 5){
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std::cout << "[5 retry-laters, cancelled]" << std::endl;
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connconn[uid]->conn->close();
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return Handle_Timeout(H, conn);
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}
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connconn[uid]->lastuse = 0;
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timeout = 0;
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Util::sleep(2000);
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connconn[uid]->conn->SendNow(request);
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continue;
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}
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break; //continue down below this while loop
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}
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}else{
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//keep trying unless the timeout triggers
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if (timeout++ > 4000){
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std::cout << "[20s timeout triggered]" << std::endl;
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connconn[uid]->conn->close();
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return Handle_Timeout(H, conn);
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}else{
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Util::sleep(5);
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}
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}
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}
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if ( !connconn.count(uid) || !connconn[uid]->conn->connected() || !conn->connected()){
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//failure, disconnect and sent error to user
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connconn[uid]->conn->close();
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return Handle_Timeout(H, conn);
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}else{
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long long int ret = Util::getMS();
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//success, check type of response
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if (H.GetHeader("Content-Length") != ""){
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//known length - simply re-send the request with added headers and continue
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H.SetHeader("X-UID", uid);
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H.SetHeader("Server", "mistserver/" PACKAGE_VERSION "/" + Util::Config::libver);
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conn->SendNow(H.BuildResponse("200", "OK"));
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}else{
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//unknown length
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H.SetHeader("X-UID", uid);
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H.SetHeader("Server", "mistserver/" PACKAGE_VERSION "/" + Util::Config::libver);
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conn->SendNow(H.BuildResponse("200", "OK"));
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//switch out the connection for an empty one - it makes no sense to keep these globally
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Socket::Connection * myConn = connconn[uid]->conn;
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connconn[uid]->conn = new Socket::Connection();
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connconn[uid]->in_use.unlock();
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//continue sending data from this socket and keep it permanently in use
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while (myConn->connected() && conn->connected()){
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if (myConn->Received().size() || myConn->spool()){
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//forward any and all incoming data directly without parsing
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conn->SendNow(myConn->Received().get());
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myConn->Received().get().clear();
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}else{
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Util::sleep(30);
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}
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}
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myConn->close();
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delete myConn;
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conn->close();
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}
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return ret;
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}
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}
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/// Returns the name of the HTTP connector the given request should be served by.
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/// Can currently return:
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/// - none (request not supported)
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/// - internal (request fed from information internal to this connector)
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/// - dynamic (request fed from http_dynamic connector)
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/// - progressive (request fed from http_progressive connector)
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std::string getHTTPType(HTTP::Parser & H){
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std::string url = H.getUrl();
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if (url.find("/dynamic/") != std::string::npos){
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std::string streamname = url.substr(9, url.find("/", 9) - 9);
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Util::Stream::sanitizeName(streamname);
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H.SetVar("stream", streamname);
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return "dynamic";
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}
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if (url.find("/smooth/") != std::string::npos && url.find(".ism") != std::string::npos){
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std::string streamname = url.substr(8, url.find("/", 8) - 12);
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Util::Stream::sanitizeName(streamname);
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H.SetVar("stream", streamname);
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return "smooth";
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}
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if (url.find("/hls/") != std::string::npos && (url.find(".m3u") != std::string::npos || url.find(".ts") != std::string::npos)){
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std::string streamname = url.substr(5, url.find("/", 5) - 5);
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Util::Stream::sanitizeName(streamname);
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H.SetVar("stream", streamname);
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return "live";
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}
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if (url.length() > 4){
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std::string ext = url.substr(url.length() - 4, 4);
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if (ext == ".flv" || ext == ".mp3"){
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std::string streamname = url.substr(1, url.length() - 5);
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Util::Stream::sanitizeName(streamname);
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H.SetVar("stream", streamname);
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return "progressive";
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}
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if (ext == ".ico"){
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return "internal";
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}
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}
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if (url == "/crossdomain.xml"){
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return "internal";
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}
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if (url == "/clientaccesspolicy.xml"){
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return "internal";
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}
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if (url.length() > 10 && url.substr(0, 7) == "/embed_" && url.substr(url.length() - 3, 3) == ".js"){
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return "internal";
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}
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if (url.length() > 9 && url.substr(0, 6) == "/info_" && url.substr(url.length() - 3, 3) == ".js"){
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return "internal";
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}
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return "none";
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}
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/// Thread for handling a single HTTP connection
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void Handle_HTTP_Connection(void * pointer){
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Socket::Connection * conn = (Socket::Connection *)pointer;
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conn->setBlocking(false); //do not block on conn.spool() when no data is available
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HTTP::Parser Client;
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while (conn->connected()){
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if (conn->spool() || conn->Received().size()){
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//make sure it ends in a \n
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if ( *(conn->Received().get().rbegin()) != '\n'){
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std::string tmp = conn->Received().get();
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conn->Received().get().clear();
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if (conn->Received().size()){
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conn->Received().get().insert(0, tmp);
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}else{
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conn->Received().append(tmp);
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}
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}
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if (Client.Read(conn->Received().get())){
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std::string handler = getHTTPType(Client);
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#if DEBUG >= 4
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std::cout << "Received request: " << Client.getUrl() << " (" << conn->getSocket() << ") => " << handler << " (" << Client.GetVar("stream")
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<< ")" << std::endl;
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long long int startms = Util::getMS();
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#endif
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long long int midms = 0;
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bool closeConnection = false;
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if (Client.GetHeader("Connection") == "close"){
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closeConnection = true;
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}
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if (handler == "none" || handler == "internal"){
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if (handler == "internal"){
|
|
midms = Handle_Internal(Client, conn);
|
|
}else{
|
|
midms = Handle_None(Client, conn);
|
|
}
|
|
}else{
|
|
midms = Handle_Through_Connector(Client, conn, handler);
|
|
}
|
|
#if DEBUG >= 4
|
|
long long int nowms = Util::getMS();
|
|
std::cout << "Completed request " << conn->getSocket() << " " << handler << " in " << (midms - startms) << " ms (processing) / " << (nowms - midms) << " ms (transfer)" << std::endl;
|
|
#endif
|
|
if (closeConnection){
|
|
break;
|
|
}
|
|
Client.Clean(); //clean for any possible next requests
|
|
}
|
|
}else{
|
|
Util::sleep(10); //sleep 10ms
|
|
}
|
|
}
|
|
//close and remove the connection
|
|
conn->close();
|
|
delete conn;
|
|
//remove this thread from active_threads and add it to done_threads.
|
|
thread_mutex.lock();
|
|
for (std::set<tthread::thread *>::iterator it = active_threads.begin(); it != active_threads.end(); it++){
|
|
if (( *it)->get_id() == tthread::this_thread::get_id()){
|
|
tthread::thread * T = ( *it);
|
|
active_threads.erase(T);
|
|
done_threads.insert(T);
|
|
break;
|
|
}
|
|
}
|
|
thread_mutex.unlock();
|
|
}
|
|
|
|
} //Connector_HTTP namespace
|
|
|
|
int main(int argc, char ** argv){
|
|
Util::Config conf(argv[0], PACKAGE_VERSION);
|
|
conf.addConnectorOptions(8080);
|
|
conf.parseArgs(argc, argv);
|
|
Socket::Server server_socket = Socket::Server(conf.getInteger("listen_port"), conf.getString("listen_interface"));
|
|
if ( !server_socket.connected()){
|
|
return 1;
|
|
}
|
|
conf.activate();
|
|
|
|
while (server_socket.connected() && conf.is_active){
|
|
Socket::Connection S = server_socket.accept();
|
|
if (S.connected()){ //check if the new connection is valid
|
|
//lock the thread mutex and spawn a new thread for this connection
|
|
Connector_HTTP::thread_mutex.lock();
|
|
tthread::thread * T = new tthread::thread(Connector_HTTP::Handle_HTTP_Connection, (void *)(new Socket::Connection(S)));
|
|
Connector_HTTP::active_threads.insert(T);
|
|
//clean up any threads that may have finished
|
|
while ( !Connector_HTTP::done_threads.empty()){
|
|
T = *Connector_HTTP::done_threads.begin();
|
|
T->join();
|
|
Connector_HTTP::done_threads.erase(T);
|
|
delete T;
|
|
}
|
|
Connector_HTTP::thread_mutex.unlock();
|
|
}else{
|
|
Util::sleep(10); //sleep 10ms
|
|
}
|
|
} //while connected and not requested to stop
|
|
server_socket.close();
|
|
|
|
//wait for existing connections to drop
|
|
bool repeat = true;
|
|
while (repeat){
|
|
Connector_HTTP::thread_mutex.lock();
|
|
repeat = !Connector_HTTP::active_threads.empty();
|
|
//clean up any threads that may have finished
|
|
while ( !Connector_HTTP::done_threads.empty()){
|
|
tthread::thread * T = *Connector_HTTP::done_threads.begin();
|
|
T->join();
|
|
Connector_HTTP::done_threads.erase(T);
|
|
delete T;
|
|
}
|
|
Connector_HTTP::thread_mutex.unlock();
|
|
if (repeat){
|
|
Util::sleep(100); //sleep 100ms
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
} //main
|