src/chrome/browser/extensions/webstore_data_fetcher.cc

   1 // Copyright 2013 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 #include "chrome/browser/extensions/webstore_data_fetcher.h"
   6
   7 #include "base/bind.h"
   8 #include "base/values.h"
   9 #include "chrome/browser/extensions/webstore_data_fetcher_delegate.h"
  10 #include "chrome/browser/safe_json_parser.h"
  11 #include "chrome/common/extensions/extension_constants.h"
  12 #include "net/base/load_flags.h"
  13 #include "net/url_request/url_fetcher.h"
  14 #include "net/url_request/url_request_status.h"
  15
  16 namespace {
  17
  18 const char kInvalidWebstoreResponseError[] = "Invalid Chrome Web Store reponse";
  19
  20 }  // namespace
  21
  22 namespace extensions {
  23
  24 WebstoreDataFetcher::WebstoreDataFetcher(
  25     WebstoreDataFetcherDelegate* delegate,
  26     net::URLRequestContextGetter* request_context,
  27     const GURL& referrer_url,
  28     const std::string webstore_item_id)
  29     : delegate_(delegate),
  30       request_context_(request_context),
  31       referrer_url_(referrer_url),
  32       id_(webstore_item_id) {
  33 }
  34
  35 WebstoreDataFetcher::~WebstoreDataFetcher() {}
  36
  37 void WebstoreDataFetcher::Start() {
  38   GURL webstore_data_url(extension_urls::GetWebstoreItemJsonDataURL(id_));
  39
  40   webstore_data_url_fetcher_.reset(net::URLFetcher::Create(
  41       webstore_data_url, net::URLFetcher::GET, this));
  42   webstore_data_url_fetcher_->SetRequestContext(request_context_);
  43   webstore_data_url_fetcher_->SetReferrer(referrer_url_.spec());
  44   webstore_data_url_fetcher_->SetLoadFlags(net::LOAD_DO_NOT_SAVE_COOKIES |
  45                                            net::LOAD_DISABLE_CACHE);
  46   webstore_data_url_fetcher_->Start();
  47 }
  48
  49 void WebstoreDataFetcher::OnJsonParseSuccess(
  50     scoped_ptr<base::Value> parsed_json) {
  51   if (!parsed_json->IsType(base::Value::TYPE_DICTIONARY)) {
  52     OnJsonParseFailure(kInvalidWebstoreResponseError);
  53     return;
  54   }
  55
  56   delegate_->OnWebstoreResponseParseSuccess(scoped_ptr<base::DictionaryValue>(
  57       static_cast<base::DictionaryValue*>(parsed_json.release())));
  58 }
  59
  60 void WebstoreDataFetcher::OnJsonParseFailure(
  61     const std::string& error) {
  62   delegate_->OnWebstoreResponseParseFailure(error);
  63 }
  64
  65 void WebstoreDataFetcher::OnURLFetchComplete(const net::URLFetcher* source) {
  66   CHECK_EQ(webstore_data_url_fetcher_.get(), source);
  67
  68   scoped_ptr<net::URLFetcher> fetcher(webstore_data_url_fetcher_.Pass());
  69
  70   if (!fetcher->GetStatus().is_success() ||
  71       fetcher->GetResponseCode() != 200) {
  72     delegate_->OnWebstoreRequestFailure();
  73     return;
  74   }
  75
  76   std::string webstore_json_data;
  77   fetcher->GetResponseAsString(&webstore_json_data);
  78
  79   scoped_refptr<SafeJsonParser> parser =
  80       new SafeJsonParser(webstore_json_data,
  81                          base::Bind(&WebstoreDataFetcher::OnJsonParseSuccess,
  82                                     AsWeakPtr()),
  83                          base::Bind(&WebstoreDataFetcher::OnJsonParseFailure,
  84                                     AsWeakPtr()));
  85   // The parser will call us back via one of the callbacks.
  86   parser->Start();
  87 }
  88
  89 }  // namespace extensions