HttpServer: Handling of multiple header fields with the same name and multiple values of "Connectio…

net/server/http_server_request_info.cc

 // Copyright (c) 2011 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.
 
 #include "net/server/http_server_request_info.h"
 
 #include "base/strings/string_util.h"
 
 namespace net {
 
 HttpServerRequestInfo::HttpServerRequestInfo() {}
 
 HttpServerRequestInfo::~HttpServerRequestInfo() {}
 
 std::string HttpServerRequestInfo::GetHeaderValue(
     const std::string& header_name) const {
   DCHECK_EQ(StringToLowerASCII(header_name), header_name);
   HttpServerRequestInfo::HeadersMap::const_iterator it =
       headers.find(header_name);
   if (it != headers.end())
     return it->second;
   return std::string();
 }
 
+bool HttpServerRequestInfo::HasHeaderValue(
+    const std::string& header_name,
+    const std::string& header_value) const {
+  DCHECK_EQ(StringToLowerASCII(header_value), header_value);
+  std::string complete_value = GetHeaderValue(header_name);
+  StringToLowerASCII(&complete_value);
+  std::vector<std::string> value_items;
+  Tokenize(complete_value, ",", &value_items);
+  for (std::vector<std::string>::iterator it = value_items.begin();
+      it != value_items.end(); ++it) {
+    base::TrimString(*it, " \t", &*it);
+    if (*it == header_value)
+      return true;
+  }
+  return false;
+}
+
 }  // namespace net