url_request_data_job.cc revision 1320f92c476a1ad9d19dba2a48c72b75566198e9
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
14namespace net {
15
16int 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
46URLRequestDataJob::URLRequestDataJob(
47    URLRequest* request, NetworkDelegate* network_delegate)
48    : URLRequestSimpleJob(request, network_delegate) {
49}
50
51int 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
66URLRequestDataJob::~URLRequestDataJob() {
67}
68
69}  // namespace net
70