components/nacl/renderer/manifest_downloader.cc

   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::Close() {
  58   // We log the status code here instead of in didReceiveResponse so that we
  59   // always log a histogram value, even when we never receive a status code.
  60   HistogramHTTPStatusCode(
  61       is_installed_ ? "NaCl.HttpStatusCodeClass.Manifest.InstalledApp" :
  62                       "NaCl.HttpStatusCodeClass.Manifest.NotInstalledApp",
  63       status_code_);
  64
  65   cb_.Run(pp_nacl_error_, buffer_);
  66   delete this;
  67 }
  68
  69 void ManifestDownloader::didFinishLoading(
  70     blink::WebURLLoader* loader,
  71     double finish_time,
  72     int64_t total_encoded_data_length) {
  73   Close();
  74 }
  75
  76 void ManifestDownloader::didFail(
  77     blink::WebURLLoader* loader,
  78     const blink::WebURLError& error) {
  79   // TODO(teravest): Find a place to share this code with PepperURLLoaderHost.
  80   pp_nacl_error_ = PP_NACL_ERROR_MANIFEST_LOAD_URL;
  81   if (error.domain.equals(blink::WebString::fromUTF8(net::kErrorDomain))) {
  82     switch (error.reason) {
  83       case net::ERR_ACCESS_DENIED:
  84       case net::ERR_NETWORK_ACCESS_DENIED:
  85         pp_nacl_error_ = PP_NACL_ERROR_MANIFEST_NOACCESS_URL;
  86         break;
  87     }
  88   } else {
  89     // It's a WebKit error.
  90     pp_nacl_error_ = PP_NACL_ERROR_MANIFEST_NOACCESS_URL;
  91   }
  92
  93   Close();
  94 }
  95
  96 }  // namespace nacl