Http Cache: Handle the asynchronous instantiation of the...

net/http/http_cache_transaction.h

 // Copyright (c) 2006-2009 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.
 
 // This file declares HttpCache::Transaction, a private class of HttpCache so
 // it should only be included by http_cache.cc
 
 #ifndef NET_HTTP_HTTP_CACHE_TRANSACTION_H_
 #define NET_HTTP_HTTP_CACHE_TRANSACTION_H_
 
@@ skipping 93 matching lines @@
   // headers used to validate cache entries.
   struct ValidationHeaders {
     ValidationHeaders() : initialized(false) {}
 
     std::string values[kNumValidationHeaders];
     bool initialized;
   };
 
   enum State {
     STATE_NONE,
+    STATE_GET_BACKEND,
+    STATE_GET_BACKEND_COMPLETE,
     STATE_SEND_REQUEST,
     STATE_SEND_REQUEST_COMPLETE,
     STATE_SUCCESSFUL_SEND_REQUEST,
     STATE_NETWORK_READ,
     STATE_NETWORK_READ_COMPLETE,
     STATE_INIT_ENTRY,
     STATE_OPEN_ENTRY,
     STATE_OPEN_ENTRY_COMPLETE,
     STATE_CREATE_ENTRY,
     STATE_CREATE_ENTRY_COMPLETE,
@@ skipping 29 matching lines @@
 
   // This will trigger the completion callback if appropriate.
   int HandleResult(int rv);
 
   // Runs the state transition loop.
   int DoLoop(int result);
 
   // Each of these methods corresponds to a State value.  If there is an
   // argument, the value corresponds to the return of the previous state or
   // corresponding callback.
+  int DoGetBackend();
+  int DoGetBackendComplete(int result);
   int DoSendRequest();
   int DoSendRequestComplete(int result);
   int DoSuccessfulSendRequest();
   int DoNetworkRead();
   int DoNetworkReadComplete(int result);
   int DoInitEntry();
   int DoOpenEntry();
   int DoOpenEntryComplete(int result);
   int DoCreateEntry();
   int DoCreateEntryComplete(int result);
@@ skipping 22 matching lines @@
   int DoCacheWriteData(int num_bytes);
   int DoCacheWriteDataComplete(int result);
 
   // Sets request_ and fields derived from it.
   void SetRequest(const BoundNetLog& net_log, const HttpRequestInfo* request);
 
   // Returns true if the request should be handled exclusively by the network
   // layer (skipping the cache entirely).
   bool ShouldPassThrough();
 
-  // Associates this transaction with a cache entry.
-  int AddToEntry();
-
   // Called to begin reading from the cache.  Returns network error code.
   int BeginCacheRead();
 
   // Called to begin validating the cache entry.  Returns network error code.
   int BeginCacheValidation();
 
   // Called to begin validating an entry that stores partial content.  Returns
   // a network error code.
   int BeginPartialCacheValidation();
 
   // Validates the entry headers against the requested range and continues with
   // the validation of the rest of the entry.  Returns a network error code.
   int ValidateEntryHeadersAndContinue(bool byte_range_requested);
 
   // Called to start requests which were given an "if-modified-since" or
   // "if-none-match" validation header by the caller (NOT when the request was
   // conditionalized internally in response to LOAD_VALIDATE_CACHE).
   // Returns a network error code.
   int BeginExternallyConditionalizedRequest();
 
-  // Called to begin a network transaction.  Returns network error code.
-  int BeginNetworkRequest();
-
   // Called to restart a network transaction after an error.  Returns network
   // error code.
   int RestartNetworkRequest();
 
   // Called to restart a network transaction with a client certificate.
   // Returns network error code.
   int RestartNetworkRequestWithCertificate(X509Certificate* client_cert);
 
   // Called to restart a network transaction with authentication credentials.
   // Returns network error code.
@@ skipping 84 matching lines @@
   bool cache_pending_;  // We are waiting for the HttpCache.
   scoped_refptr<IOBuffer> read_buf_;
   int io_buf_len_;
   int read_offset_;
   int effective_load_flags_;
   scoped_ptr<PartialData> partial_;  // We are dealing with range requests.
   uint64 final_upload_progress_;
   CompletionCallbackImpl<Transaction> io_callback_;
   scoped_refptr<CancelableCompletionCallback<Transaction> > cache_callback_;
   scoped_refptr<CancelableCompletionCallback<Transaction> >
-  write_headers_callback_;
+      write_headers_callback_;
 };
 
 }  // namespace net
 
 #endif  // NET_HTTP_HTTP_CACHE_TRANSACTION_H_