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+/*
+ * libjingle
+ * Copyright 2004--2005, Google Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without 
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *  1. Redistributions of source code must retain the above copyright notice, 
+ *     this list of conditions and the following disclaimer.
+ *  2. Redistributions in binary form must reproduce the above copyright notice,
+ *     this list of conditions and the following disclaimer in the documentation
+ *     and/or other materials provided with the distribution.
+ *  3. The name of the author may not be used to endorse or promote products 
+ *     derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
+ * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef TALK_BASE_HTTPCLIENT_H__
+#define TALK_BASE_HTTPCLIENT_H__
+
+#include "talk/base/common.h"
+#include "talk/base/httpbase.h"
+#include "talk/base/proxyinfo.h"
+#include "talk/base/scoped_ptr.h"
+#include "talk/base/sigslot.h"
+#include "talk/base/socketaddress.h"
+#include "talk/base/socketpool.h"
+
+namespace talk_base {
+
+//////////////////////////////////////////////////////////////////////
+// HttpClient
+//////////////////////////////////////////////////////////////////////
+
+class DiskCache;
+class HttpClient;
+class IPNetPool;
+
+class HttpClient : private IHttpNotify {
+public:
+  HttpClient(const std::string& agent, StreamPool* pool);
+  virtual ~HttpClient();
+
+  void set_pool(StreamPool* pool) { pool_ = pool; }
+
+  const std::string& agent() const { return agent_; }
+  
+  void set_proxy(const ProxyInfo& proxy) { proxy_ = proxy; }
+  const ProxyInfo& proxy() const { return proxy_; }
+
+  void set_fail_redirect(bool fail_redirect) { fail_redirect_ = fail_redirect; }
+  bool fail_redirect() const { return fail_redirect_; }
+
+  void use_absolute_uri(bool absolute_uri) { absolute_uri_ = absolute_uri; }
+  bool absolute_uri() const { return absolute_uri_; }
+
+  void set_cache(DiskCache* cache) { ASSERT(!IsCacheActive()); cache_ = cache; }
+  bool cache_enabled() const { return (NULL != cache_); }
+
+  // reset clears the server, request, and response structures.  It will also
+  // abort an active request.
+  void reset();
+  
+  void set_server(const SocketAddress& address);
+  const SocketAddress& server() const { return server_; }
+
+  HttpRequestData& request() { return request_; }
+  const HttpRequestData& request() const { return request_; }
+  HttpResponseData& response() { return response_; }
+  const HttpResponseData& response() const { return response_; }
+  
+  // convenience methods
+  void prepare_get(const std::string& url);
+  void prepare_post(const std::string& url, const std::string& content_type,
+                    StreamInterface* request_doc);
+
+  // After you finish setting up your request, call start.
+  void start();
+  
+  // Signalled when the header has finished downloading, before the document
+  // content is processed.  This notification is for informational purposes
+  // only.  Do not modify the client in response to this.
+  sigslot::signal3<const HttpClient*,bool,size_t> SignalHeaderAvailable;
+  // Signalled when the current 'call' finishes.  On success, err is 0.
+  sigslot::signal2<HttpClient*,int> SignalHttpClientComplete;
+  // Signalled when the network connection goes down while a call is not
+  // in progress.
+  sigslot::signal2<HttpClient*,int> SignalHttpClientClosed;
+
+protected:
+  void release();
+
+  bool BeginCacheFile();
+  HttpError WriteCacheHeaders(const std::string& id);
+  void CompleteCacheFile();
+
+  bool CheckCache();
+  HttpError ReadCacheHeaders(const std::string& id, bool override);
+  HttpError ReadCacheBody(const std::string& id);
+
+  bool PrepareValidate();
+  HttpError CompleteValidate();
+
+  HttpError OnHeaderAvailable(bool ignore_data, bool chunked, size_t data_size);
+
+  // IHttpNotify Interface
+  virtual HttpError onHttpHeaderComplete(bool chunked, size_t& data_size);
+  virtual void onHttpComplete(HttpMode mode, HttpError err);
+  virtual void onHttpClosed(HttpError err);
+  
+private:
+  enum CacheState { CS_READY, CS_WRITING, CS_READING, CS_VALIDATING };
+  bool IsCacheActive() const { return (cache_state_ > CS_READY); }
+
+  std::string agent_;
+  StreamPool* pool_;
+  HttpBase base_;
+  SocketAddress server_;
+  ProxyInfo proxy_;
+  HttpRequestData request_;
+  HttpResponseData response_;
+  bool fail_redirect_, absolute_uri_;
+  scoped_ptr<HttpAuthContext> context_;
+  DiskCache* cache_;
+  CacheState cache_state_;
+};
+
+//////////////////////////////////////////////////////////////////////
+// Default implementation of HttpClient
+//////////////////////////////////////////////////////////////////////
+
+class HttpClientDefault : public ReuseSocketPool, public HttpClient {
+public:
+  HttpClientDefault(SocketFactory* factory, const std::string& agent) 
+  : ReuseSocketPool(factory), HttpClient(agent, NULL)
+  { 
+    set_pool(this);
+  }
+};
+
+//////////////////////////////////////////////////////////////////////
+
+}  // namespace talk_base
+
+#endif // TALK_BASE_HTTPCLIENT_H__