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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 { MSG_TIMEOUT = SignalThread::ST_MSG_FIRST_AVAILABLE };
     33 static const int kDefaultHTTPTimeout = 30 * 1000;  // 30 sec
     34 
     35 ///////////////////////////////////////////////////////////////////////////////
     36 // AsyncHttpRequest
     37 ///////////////////////////////////////////////////////////////////////////////
     38 
     39 AsyncHttpRequest::AsyncHttpRequest(const std::string &user_agent)
     40     : firewall_(NULL), port_(80), secure_(false),
     41       timeout_(kDefaultHTTPTimeout), fail_redirect_(false),
     42       factory_(Thread::Current()->socketserver(), user_agent),
     43       pool_(&factory_), client_(user_agent.c_str(), &pool_), error_(HE_NONE)  {
     44   client_.SignalHttpClientComplete.connect(this,
     45       &AsyncHttpRequest::OnComplete);
     46 }
     47 
     48 AsyncHttpRequest::~AsyncHttpRequest() {
     49 }
     50 
     51 void AsyncHttpRequest::OnWorkStart() {
     52   factory_.SetProxy(proxy_);
     53   if (secure_)
     54     factory_.UseSSL(host_.c_str());
     55 
     56   bool transparent_proxy = (port_ == 80) &&
     57            ((proxy_.type == PROXY_HTTPS) || (proxy_.type == PROXY_UNKNOWN));
     58   if (transparent_proxy) {
     59     client_.set_proxy(proxy_);
     60   }
     61   client_.set_fail_redirect(fail_redirect_);
     62   client_.set_server(SocketAddress(host_, port_));
     63 
     64   LOG(LS_INFO) << "HttpRequest start: " << host_ + client_.request().path;
     65 
     66   Thread::Current()->PostDelayed(timeout_, this, MSG_TIMEOUT);
     67   client_.start();
     68 }
     69 
     70 void AsyncHttpRequest::OnWorkStop() {
     71   // worker is already quitting, no need to explicitly quit
     72   LOG(LS_INFO) << "HttpRequest cancelled";
     73 }
     74 
     75 void AsyncHttpRequest::OnComplete(HttpClient* client, HttpErrorType error) {
     76   Thread::Current()->Clear(this, MSG_TIMEOUT);
     77 
     78   set_error(error);
     79   if (!error) {
     80     LOG(LS_INFO) << "HttpRequest completed successfully";
     81 
     82     std::string value;
     83     if (client_.response().hasHeader(HH_LOCATION, &value)) {
     84       response_redirect_ = value.c_str();
     85     }
     86   } else {
     87     LOG(LS_INFO) << "HttpRequest completed with error: " << error;
     88   }
     89 
     90   worker()->Quit();
     91 }
     92 
     93 void AsyncHttpRequest::OnMessage(Message* message) {
     94   if (message->message_id != MSG_TIMEOUT) {
     95     SignalThread::OnMessage(message);
     96     return;
     97   }
     98 
     99   LOG(LS_INFO) << "HttpRequest timed out";
    100   client_.reset();
    101   worker()->Quit();
    102 }
    103 
    104 void AsyncHttpRequest::DoWork() {
    105   // Do nothing while we wait for the request to finish. We only do this so
    106   // that we can be a SignalThread; in the future this class should not be
    107   // a SignalThread, since it does not need to spawn a new thread.
    108   Thread::Current()->ProcessMessages(kForever);
    109 }
    110 
    111 }  // namespace talk_base
    112