net/url_request/url_request_data_job.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 // Simple implementation of a data: protocol handler.
   6
   7 #include "net/url_request/url_request_data_job.h"
   8
   9 #include "net/base/data_url.h"
  10 #include "net/base/net_errors.h"
  11 #include "net/http/http_response_headers.h"
  12 #include "url/gurl.h"
  13
  14 namespace net {
  15
  16 int URLRequestDataJob::BuildResponse(const GURL& url,
  17                                      std::string* mime_type,
  18                                      std::string* charset,
  19                                      std::string* data,
  20                                      HttpResponseHeaders* headers) {
  21   if (!net::DataURL::Parse(url, mime_type, charset, data))
  22     return net::ERR_INVALID_URL;
  23
  24   // |mime_type| set by net::DataURL::Parse() is guaranteed to be in
  25   //     token "/" token
  26   // form. |charset| is also guaranteed to be a token.
  27
  28   DCHECK(!mime_type->empty());
  29   DCHECK(!charset->empty());
  30
  31   if (headers) {
  32     headers->ReplaceStatusLine("HTTP/1.1 200 OK");
  33     // "charset" in the Content-Type header is specified explicitly to follow
  34     // the "token" ABNF in the HTTP spec. When DataURL::Parse() call is
  35     // successful, it's guaranteed that the string in |charset| follows the
  36     // "token" ABNF.
  37     std::string content_type_header =
  38         "Content-Type: " + *mime_type + ";charset=" + *charset;
  39     headers->AddHeader(content_type_header);
  40     headers->AddHeader("Access-Control-Allow-Origin: *");
  41   }
  42
  43   return net::OK;
  44 }
  45
  46 URLRequestDataJob::URLRequestDataJob(
  47     URLRequest* request, NetworkDelegate* network_delegate)
  48     : URLRequestSimpleJob(request, network_delegate) {
  49 }
  50
  51 int URLRequestDataJob::GetData(std::string* mime_type,
  52                                std::string* charset,
  53                                std::string* data,
  54                                const CompletionCallback& callback) const {
  55   // Check if data URL is valid. If not, don't bother to try to extract data.
  56   // Otherwise, parse the data from the data URL.
  57   const GURL& url = request_->url();
  58   if (!url.is_valid())
  59     return ERR_INVALID_URL;
  60
  61   // TODO(tyoshino): Get the headers and export via
  62   // URLRequestJob::GetResponseInfo().
  63   return BuildResponse(url, mime_type, charset, data, NULL);
  64 }
  65
  66 URLRequestDataJob::~URLRequestDataJob() {
  67 }
  68
  69 }  // namespace net