Http cache: Extend support for byte range requests....

net/http/http_response_headers.cc

 // 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.
 
 // The rules for header parsing were borrowed from Firefox:
 // http://lxr.mozilla.org/seamonkey/source/netwerk/protocol/http/src/nsHttpResponseHead.cpp
 // The rules for parsing content-types were also borrowed from Firefox:
 // http://lxr.mozilla.org/mozilla/source/netwerk/base/src/nsURLHelper.cpp#834
 
 #include "net/http/http_response_headers.h"
@@ skipping 238 matching lines @@
   new_raw_headers.append(header);
   new_raw_headers.push_back('\0');
   new_raw_headers.push_back('\0');
 
   // Make this object hold the new data.
   raw_headers_.clear();
   parsed_.clear();
   Parse(new_raw_headers);
 }
 
+void HttpResponseHeaders::ReplaceStatusLine(const std::string& new_status) {
+  // Copy up to the null byte.  This just copies the status line.
+  std::string new_raw_headers(new_status);
+  new_raw_headers.push_back('\0');
+
+  HeaderSet empty_to_remove;
+  MergeWithHeaders(new_raw_headers, empty_to_remove);
+}
+
 void HttpResponseHeaders::Parse(const std::string& raw_input) {
   raw_headers_.reserve(raw_input.size());
 
   // ParseStatusLine adds a normalized status line to raw_headers_
   std::string::const_iterator line_begin = raw_input.begin();
   std::string::const_iterator line_end =
       find(line_begin, raw_input.end(), '\0');
   // has_headers = true, if there is any data following the status line.
   // Used by ParseStatusLine() to decide if a HTTP/0.9 is really a HTTP/1.0.
   bool has_headers = line_end != raw_input.end() &&
@@ skipping 846 matching lines @@
   } else if (*instance_length < 0 ||
              *instance_length <
                  *last_byte_position - *first_byte_position + 1) {
     return false;
   }
 
   return true;
 }
 
 }  // namespace net