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      1 // Copyright 2014 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 "components/nacl/renderer/manifest_downloader.h"
      6 
      7 #include "base/callback.h"
      8 #include "components/nacl/renderer/histogram.h"
      9 #include "components/nacl/renderer/nexe_load_manager.h"
     10 #include "net/base/net_errors.h"
     11 #include "third_party/WebKit/public/platform/WebURLError.h"
     12 #include "third_party/WebKit/public/platform/WebURLLoader.h"
     13 #include "third_party/WebKit/public/platform/WebURLResponse.h"
     14 
     15 namespace nacl {
     16 
     17 ManifestDownloader::ManifestDownloader(
     18     scoped_ptr<blink::WebURLLoader> url_loader,
     19     bool is_installed,
     20     Callback cb)
     21     : url_loader_(url_loader.Pass()),
     22       is_installed_(is_installed),
     23       cb_(cb),
     24       status_code_(-1),
     25       pp_nacl_error_(PP_NACL_ERROR_LOAD_SUCCESS) {
     26   CHECK(!cb.is_null());
     27 }
     28 
     29 ManifestDownloader::~ManifestDownloader() { }
     30 
     31 void ManifestDownloader::Load(const blink::WebURLRequest& request) {
     32   url_loader_->loadAsynchronously(request, this);
     33 }
     34 
     35 void ManifestDownloader::didReceiveResponse(
     36     blink::WebURLLoader* loader,
     37     const blink::WebURLResponse& response) {
     38   if (response.httpStatusCode() != 200)
     39     pp_nacl_error_ = PP_NACL_ERROR_MANIFEST_LOAD_URL;
     40   status_code_ = response.httpStatusCode();
     41 }
     42 
     43 void ManifestDownloader::didReceiveData(
     44     blink::WebURLLoader* loader,
     45     const char* data,
     46     int data_length,
     47     int encoded_data_length) {
     48   if (buffer_.size() + data_length > kNaClManifestMaxFileBytes) {
     49     pp_nacl_error_ = PP_NACL_ERROR_MANIFEST_TOO_LARGE;
     50     buffer_.clear();
     51   }
     52 
     53   if (pp_nacl_error_ == PP_NACL_ERROR_LOAD_SUCCESS)
     54     buffer_.append(data, data_length);
     55 }
     56 
     57 void ManifestDownloader::didFinishLoading(
     58     blink::WebURLLoader* loader,
     59     double finish_time,
     60     int64_t total_encoded_data_length) {
     61   // We log the status code here instead of in didReceiveResponse so that we
     62   // always log a histogram value, even when we never receive a status code.
     63   HistogramHTTPStatusCode(
     64       is_installed_ ? "NaCl.HttpStatusCodeClass.Manifest.InstalledApp" :
     65                       "NaCl.HttpStatusCodeClass.Manifest.NotInstalledApp",
     66       status_code_);
     67 
     68   cb_.Run(pp_nacl_error_, buffer_);
     69   delete this;
     70 }
     71 
     72 void ManifestDownloader::didFail(
     73     blink::WebURLLoader* loader,
     74     const blink::WebURLError& error) {
     75   // TODO(teravest): Find a place to share this code with PepperURLLoaderHost.
     76   pp_nacl_error_ = PP_NACL_ERROR_MANIFEST_LOAD_URL;
     77   if (error.domain.equals(blink::WebString::fromUTF8(net::kErrorDomain))) {
     78     switch (error.reason) {
     79       case net::ERR_ACCESS_DENIED:
     80       case net::ERR_NETWORK_ACCESS_DENIED:
     81         pp_nacl_error_ = PP_NACL_ERROR_MANIFEST_NOACCESS_URL;
     82         break;
     83     }
     84   } else {
     85     // It's a WebKit error.
     86     pp_nacl_error_ = PP_NACL_ERROR_MANIFEST_NOACCESS_URL;
     87   }
     88 }
     89 
     90 }  // namespace nacl
     91