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      1 /*
      2  * libjingle
      3  * Copyright 2004--2010, Google Inc.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions are met:
      7  *
      8  *  1. Redistributions of source code must retain the above copyright notice,
      9  *     this list of conditions and the following disclaimer.
     10  *  2. Redistributions in binary form must reproduce the above copyright notice,
     11  *     this list of conditions and the following disclaimer in the documentation
     12  *     and/or other materials provided with the distribution.
     13  *  3. The name of the author may not be used to endorse or promote products
     14  *     derived from this software without specific prior written permission.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
     17  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
     18  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
     19  * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     20  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     21  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
     22  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
     23  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
     24  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
     25  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     26  */
     27 
     28 #include "talk/base/asynchttprequest.h"
     29 
     30 namespace talk_base {
     31 
     32 enum {
     33   MSG_TIMEOUT = SignalThread::ST_MSG_FIRST_AVAILABLE,
     34   MSG_LAUNCH_REQUEST
     35 };
     36 static const int kDefaultHTTPTimeout = 30 * 1000;  // 30 sec
     37 
     38 ///////////////////////////////////////////////////////////////////////////////
     39 // AsyncHttpRequest
     40 ///////////////////////////////////////////////////////////////////////////////
     41 
     42 AsyncHttpRequest::AsyncHttpRequest(const std::string &user_agent)
     43     : start_delay_(0),
     44       firewall_(NULL),
     45       port_(80),
     46       secure_(false),
     47       timeout_(kDefaultHTTPTimeout),
     48       fail_redirect_(false),
     49       factory_(Thread::Current()->socketserver(), user_agent),
     50       pool_(&factory_),
     51       client_(user_agent.c_str(), &pool_),
     52       error_(HE_NONE) {
     53   client_.SignalHttpClientComplete.connect(this,
     54       &AsyncHttpRequest::OnComplete);
     55 }
     56 
     57 AsyncHttpRequest::~AsyncHttpRequest() {
     58 }
     59 
     60 void AsyncHttpRequest::OnWorkStart() {
     61   if (start_delay_ <= 0) {
     62     LaunchRequest();
     63   } else {
     64     Thread::Current()->PostDelayed(start_delay_, this, MSG_LAUNCH_REQUEST);
     65   }
     66 }
     67 
     68 void AsyncHttpRequest::OnWorkStop() {
     69   // worker is already quitting, no need to explicitly quit
     70   LOG(LS_INFO) << "HttpRequest cancelled";
     71 }
     72 
     73 void AsyncHttpRequest::OnComplete(HttpClient* client, HttpErrorType error) {
     74   Thread::Current()->Clear(this, MSG_TIMEOUT);
     75 
     76   set_error(error);
     77   if (!error) {
     78     LOG(LS_INFO) << "HttpRequest completed successfully";
     79 
     80     std::string value;
     81     if (client_.response().hasHeader(HH_LOCATION, &value)) {
     82       response_redirect_ = value.c_str();
     83     }
     84   } else {
     85     LOG(LS_INFO) << "HttpRequest completed with error: " << error;
     86   }
     87 
     88   worker()->Quit();
     89 }
     90 
     91 void AsyncHttpRequest::OnMessage(Message* message) {
     92   switch (message->message_id) {
     93    case MSG_TIMEOUT:
     94     LOG(LS_INFO) << "HttpRequest timed out";
     95     client_.reset();
     96     worker()->Quit();
     97     break;
     98    case MSG_LAUNCH_REQUEST:
     99     LaunchRequest();
    100     break;
    101    default:
    102     SignalThread::OnMessage(message);
    103     break;
    104   }
    105 }
    106 
    107 void AsyncHttpRequest::DoWork() {
    108   // Do nothing while we wait for the request to finish. We only do this so
    109   // that we can be a SignalThread; in the future this class should not be
    110   // a SignalThread, since it does not need to spawn a new thread.
    111   Thread::Current()->ProcessMessages(kForever);
    112 }
    113 
    114 void AsyncHttpRequest::LaunchRequest() {
    115   factory_.SetProxy(proxy_);
    116   if (secure_)
    117     factory_.UseSSL(host_.c_str());
    118 
    119   bool transparent_proxy = (port_ == 80) &&
    120            ((proxy_.type == PROXY_HTTPS) || (proxy_.type == PROXY_UNKNOWN));
    121   if (transparent_proxy) {
    122     client_.set_proxy(proxy_);
    123   }
    124   client_.set_fail_redirect(fail_redirect_);
    125   client_.set_server(SocketAddress(host_, port_));
    126 
    127   LOG(LS_INFO) << "HttpRequest start: " << host_ + client_.request().path;
    128 
    129   Thread::Current()->PostDelayed(timeout_, this, MSG_TIMEOUT);
    130   client_.start();
    131 }
    132 
    133 }  // namespace talk_base
    134