Initial implementation of Cronet Async API.

components/cronet/android/cronet_url_request_adapter.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef COMPONENTS_CRONET_ANDROID_URL_REQUEST_ADAPTER_H_
-#define COMPONENTS_CRONET_ANDROID_URL_REQUEST_ADAPTER_H_
+#ifndef COMPONENTS_CRONET_ANDROID_CRONET_URL_REQUEST_ADAPTER_H_
+#define COMPONENTS_CRONET_ANDROID_CRONET_URL_REQUEST_ADAPTER_H_
 
 #include <jni.h>
 
 #include <string>
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "net/base/request_priority.h"
 #include "net/http/http_request_headers.h"
 #include "net/url_request/url_request.h"
 
 namespace net {
 class GrowableIOBuffer;
 class HttpResponseHeaders;
 class UploadDataStream;
 }  // namespace net
 
 namespace cronet {
 
-class URLRequestContextAdapter;
+class CronetURLRequestContextAdapter;
 
 // An adapter from the JNI |UrlRequest| object and the Chromium |URLRequest|
 // object.
-class URLRequestAdapter : public net::URLRequest::Delegate {
+class CronetURLRequestAdapter : public net::URLRequest::Delegate {

[mmenke, 2014/10/02 15:24:09]

I think we should make the JniCronetURLRequestAdapterDelegate the
URLRequest::Delegate.  It makes life much simpler to have all knowledge of how
the URLRequest talks to the delegate in one place, and also limits what the
adapter does on the network thread.

[mef, 2014/10/02 22:07:43]

Acknowledged. Per conversation we've agreed to have CronetURLRequestAdapter
contain all the knowledge and CronetURLRequestAdapterDelegate just provide JNI
glue for that.

  public:
   // The delegate which is called when the request finishes.
-  class URLRequestAdapterDelegate
-      : public base::RefCountedThreadSafe<URLRequestAdapterDelegate> {
+  class CronetURLRequestAdapterDelegate
+      : public base::RefCountedThreadSafe<CronetURLRequestAdapterDelegate> {
    public:
-    virtual void OnResponseStarted(URLRequestAdapter* request) = 0;
-    virtual void OnBytesRead(URLRequestAdapter* request) = 0;
-    virtual void OnRequestFinished(URLRequestAdapter* request) = 0;
-    virtual int ReadFromUploadChannel(net::IOBuffer* buf, int buf_length) = 0;
+    virtual void OnRedirect(CronetURLRequestAdapter* request,
+                            const GURL& newLocation) = 0;
+    virtual void OnResponseStarted(CronetURLRequestAdapter* request) = 0;
+    virtual void OnBytesRead(CronetURLRequestAdapter* request,
+                             int bytes_read) = 0;
+    virtual void OnRequestFinished(CronetURLRequestAdapter* request,
+                                   bool cancelled) = 0;
 
    protected:
-    friend class base::RefCountedThreadSafe<URLRequestAdapterDelegate>;
-    virtual ~URLRequestAdapterDelegate() {}
+    friend class base::RefCountedThreadSafe<CronetURLRequestAdapterDelegate>;
+    virtual ~CronetURLRequestAdapterDelegate() {}
   };
 
-  URLRequestAdapter(URLRequestContextAdapter* context,
-                    URLRequestAdapterDelegate* delegate,
-                    GURL url,
-                    net::RequestPriority priority);
-  virtual ~URLRequestAdapter();
+  CronetURLRequestAdapter(CronetURLRequestContextAdapter* context,
+                          CronetURLRequestAdapterDelegate* delegate,
+                          GURL url,
+                          net::RequestPriority priority);
+  virtual ~CronetURLRequestAdapter();
 
   // Sets the request method GET, POST etc
   void SetMethod(const std::string& method);
 
   // Adds a header to the request
   void AddHeader(const std::string& name, const std::string& value);
 
-  // Sets the contents of the POST or PUT request
-  void SetUploadContent(const char* bytes, int bytes_len);
-
-  // Sets the request to streaming upload.
-  void SetUploadChannel(JNIEnv* env, int64 content_length);
-
-  // Indicates that the request body will be streamed by calling AppendChunk()
-  // repeatedly. This must be called before Start().
-  void EnableChunkedUpload();
-
-  // Appends a chunk to the POST body.
-  // This must be called after EnableChunkedUpload() and Start().
-  void AppendChunk(const char* bytes, int bytes_len, bool is_last_chunk);
-
   // Starts the request.
   void Start();
 
+  // Follow redirect.
+  void FollowDeferredRedirect();
+
+  // Read more data.
+  void ReadData();
+
   // Cancels the request.
   void Cancel();
 
   // Releases all resources for the request and deletes the object itself.
   void Destroy();
 
   // Returns the URL of the request.
   GURL url() const { return url_; }
 
   // Returns the error code after the request is complete.
@@ skipping 19 matching lines @@
 
   // Returns the overall number of bytes read.
   size_t bytes_read() const { return bytes_read_; }
 
   // Returns a pointer to the downloaded data.
   unsigned char* Data() const;
 
   // Get NPN or ALPN Negotiated Protocol (if any) from HttpResponseInfo.
   std::string GetNegotiatedProtocol() const;
 
+  // Returns true if response is coming from the cache.
+  bool GetWasCached() const;
+
+  // Gets the total amount of data received from network after SSL decoding and
+  // proxy handling.
+  int64 GetTotalReceivedBytes() const;
+
+  // net::URLRequest::Delegate overrides
+  virtual void OnReceivedRedirect(net::URLRequest* request,
+                                  const net::RedirectInfo& redirect_info,
+                                  bool* defer_redirect) OVERRIDE;
+
   virtual void OnResponseStarted(net::URLRequest* request) OVERRIDE;
 
   virtual void OnReadCompleted(net::URLRequest* request,
                                int bytes_read) OVERRIDE;
 
  private:
-  static void OnDestroyRequest(URLRequestAdapter* self);
+  static void DestroyOnNetworkThread(CronetURLRequestAdapter* self);
+  void StartOnNetworkThread();
+  void FollowDeferredRedirectOnNetworkThread();
+  void ReadDataOnNetworkThread();
+  void CancelOnNetworkThread();
 
-  void OnInitiateConnection();
-  void OnCancelRequest();
-  void OnRequestSucceeded();
-  void OnRequestFailed();
-  void OnRequestCompleted();
-  void OnRequestCanceled();
-  void OnBytesRead(int bytes_read);
-  void OnAppendChunk(const scoped_ptr<char[]> bytes, int bytes_len,
-                     bool is_last_chunk);
-
-  void Read();
-
-  URLRequestContextAdapter* context_;
-  scoped_refptr<URLRequestAdapterDelegate> delegate_;
+  CronetURLRequestContextAdapter* context_;
+  scoped_refptr<CronetURLRequestAdapterDelegate> delegate_;
   GURL url_;
   net::RequestPriority priority_;
   std::string method_;
   net::HttpRequestHeaders headers_;
   scoped_ptr<net::URLRequest> url_request_;
-  scoped_ptr<net::UploadDataStream> upload_data_stream_;
-  scoped_refptr<net::GrowableIOBuffer> read_buffer_;
+  scoped_refptr<net::IOBufferWithSize> read_buffer_;
   int bytes_read_;
   int total_bytes_read_;
   int error_code_;
   int http_status_code_;
   std::string content_type_;
   bool canceled_;
   int64 expected_size_;
   bool chunked_upload_;
 
-  DISALLOW_COPY_AND_ASSIGN(URLRequestAdapter);
+  DISALLOW_COPY_AND_ASSIGN(CronetURLRequestAdapter);
 };
 
 }  // namespace cronet
 
-#endif  // COMPONENTS_CRONET_ANDROID_URL_REQUEST_ADAPTER_H_
+#endif  // COMPONENTS_CRONET_ANDROID_CRONET_URL_REQUEST_ADAPTER_H_