content/child/npapi/plugin_url_fetcher.cc

   1 // Copyright (c) 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 "content/child/npapi/plugin_url_fetcher.h"
   6
   7 #include "base/memory/scoped_ptr.h"
   8 #include "content/child/child_thread.h"
   9 #include "content/child/npapi/plugin_host.h"
  10 #include "content/child/npapi/plugin_instance.h"
  11 #include "content/child/npapi/plugin_stream_url.h"
  12 #include "content/child/npapi/webplugin.h"
  13 #include "content/child/npapi/webplugin_resource_client.h"
  14 #include "content/child/plugin_messages.h"
  15 #include "content/child/request_extra_data.h"
  16 #include "content/child/request_info.h"
  17 #include "content/child/resource_dispatcher.h"
  18 #include "content/child/web_url_loader_impl.h"
  19 #include "content/common/resource_request_body.h"
  20 #include "content/common/service_worker/service_worker_types.h"
  21 #include "content/public/common/resource_response_info.h"
  22 #include "net/base/load_flags.h"
  23 #include "net/base/net_errors.h"
  24 #include "net/http/http_response_headers.h"
  25 #include "third_party/WebKit/public/platform/WebURLLoaderClient.h"
  26 #include "third_party/WebKit/public/platform/WebURLResponse.h"
  27 #include "webkit/child/multipart_response_delegate.h"
  28 #include "webkit/child/resource_loader_bridge.h"
  29
  30 namespace content {
  31 namespace {
  32
  33 // This class handles individual multipart responses. It is instantiated when
  34 // we receive HTTP status code 206 in the HTTP response. This indicates
  35 // that the response could have multiple parts each separated by a boundary
  36 // specified in the response header.
  37 // TODO(jam): this is similar to MultiPartResponseClient in webplugin_impl.cc,
  38 // we should remove that other class once we switch to loading from the plugin
  39 // process by default.
  40 class MultiPartResponseClient : public blink::WebURLLoaderClient {
  41  public:
  42   explicit MultiPartResponseClient(PluginStreamUrl* plugin_stream)
  43       : byte_range_lower_bound_(0), plugin_stream_(plugin_stream) {}
  44
  45   // blink::WebURLLoaderClient implementation:
  46   virtual void didReceiveResponse(
  47       blink::WebURLLoader* loader,
  48       const blink::WebURLResponse& response) OVERRIDE {
  49     int64 byte_range_upper_bound, instance_size;
  50     if (!webkit_glue::MultipartResponseDelegate::ReadContentRanges(
  51             response, &byte_range_lower_bound_, &byte_range_upper_bound,
  52             &instance_size)) {
  53       NOTREACHED();
  54     }
  55   }
  56   virtual void didReceiveData(blink::WebURLLoader* loader,
  57                               const char* data,
  58                               int data_length,
  59                               int encoded_data_length) OVERRIDE {
  60     // TODO(ananta)
  61     // We should defer further loads on multipart resources on the same lines
  62     // as regular resources requested by plugins to prevent reentrancy.
  63     int64 data_offset = byte_range_lower_bound_;
  64     byte_range_lower_bound_ += data_length;
  65     plugin_stream_->DidReceiveData(data, data_length, data_offset);
  66     // DANGER: this instance may be deleted at this point.
  67   }
  68
  69  private:
  70   // The lower bound of the byte range.
  71   int64 byte_range_lower_bound_;
  72   // The handler for the data.
  73   PluginStreamUrl* plugin_stream_;
  74 };
  75
  76 }  // namespace
  77
  78 PluginURLFetcher::PluginURLFetcher(PluginStreamUrl* plugin_stream,
  79                                    const GURL& url,
  80                                    const GURL& first_party_for_cookies,
  81                                    const std::string& method,
  82                                    const char* buf,
  83                                    unsigned int len,
  84                                    const GURL& referrer,
  85                                    const std::string& range,
  86                                    bool notify_redirects,
  87                                    bool is_plugin_src_load,
  88                                    int origin_pid,
  89                                    int render_frame_id,
  90                                    int render_view_id,
  91                                    unsigned long resource_id,
  92                                    bool copy_stream_data)
  93     : plugin_stream_(plugin_stream),
  94       url_(url),
  95       first_party_for_cookies_(first_party_for_cookies),
  96       method_(method),
  97       referrer_(referrer),
  98       notify_redirects_(notify_redirects),
  99       is_plugin_src_load_(is_plugin_src_load),
 100       origin_pid_(origin_pid),
 101       render_frame_id_(render_frame_id),
 102       render_view_id_(render_view_id),
 103       resource_id_(resource_id),
 104       copy_stream_data_(copy_stream_data),
 105       data_offset_(0),
 106       pending_failure_notification_(false) {
 107   RequestInfo request_info;
 108   request_info.method = method;
 109   request_info.url = url;
 110   request_info.first_party_for_cookies = first_party_for_cookies;
 111   request_info.referrer = referrer;
 112   request_info.load_flags = net::LOAD_NORMAL;
 113   request_info.requestor_pid = origin_pid;
 114   request_info.request_type = ResourceType::OBJECT;
 115   request_info.routing_id = render_view_id;
 116
 117   RequestExtraData extra_data;
 118   extra_data.set_render_frame_id(render_frame_id);
 119   extra_data.set_is_main_frame(false);
 120   request_info.extra_data = &extra_data;
 121
 122   std::vector<char> body;
 123   if (method == "POST") {
 124     bool content_type_found = false;
 125     std::vector<std::string> names;
 126     std::vector<std::string> values;
 127     PluginHost::SetPostData(buf, len, &names, &values, &body);
 128     for (size_t i = 0; i < names.size(); ++i) {
 129       if (!request_info.headers.empty())
 130         request_info.headers += "\r\n";
 131       request_info.headers += names[i] + ": " + values[i];
 132       if (LowerCaseEqualsASCII(names[i], "content-type"))
 133         content_type_found = true;
 134     }
 135
 136     if (!content_type_found) {
 137       if (!request_info.headers.empty())
 138         request_info.headers += "\r\n";
 139       request_info.headers += "Content-Type: application/x-www-form-urlencoded";
 140     }
 141   } else {
 142     if (!range.empty())
 143       request_info.headers = std::string("Range: ") + range;
 144   }
 145
 146   bridge_.reset(ChildThread::current()->resource_dispatcher()->CreateBridge(
 147       request_info));
 148   if (!body.empty()) {
 149     scoped_refptr<ResourceRequestBody> request_body =
 150         new ResourceRequestBody;
 151     request_body->AppendBytes(&body[0], body.size());
 152     bridge_->SetRequestBody(request_body.get());
 153   }
 154
 155   bridge_->Start(this);
 156
 157   // TODO(jam): range requests
 158 }
 159
 160 PluginURLFetcher::~PluginURLFetcher() {
 161 }
 162
 163 void PluginURLFetcher::Cancel() {
 164   bridge_->Cancel();
 165
 166   // Due to races and nested event loops, PluginURLFetcher may still receive
 167   // events from the bridge before being destroyed. Do not forward additional
 168   // events back to the plugin, via either |plugin_stream_| or
 169   // |multipart_delegate_| which has its own pointer via
 170   // MultiPartResponseClient.
 171   if (multipart_delegate_)
 172     multipart_delegate_->Cancel();
 173   plugin_stream_ = NULL;
 174 }
 175
 176 void PluginURLFetcher::URLRedirectResponse(bool allow) {
 177   if (!plugin_stream_)
 178     return;
 179
 180   if (allow) {
 181     bridge_->SetDefersLoading(false);
 182   } else {
 183     bridge_->Cancel();
 184     plugin_stream_->DidFail(resource_id_);  // That will delete |this|.
 185   }
 186 }
 187
 188 void PluginURLFetcher::OnUploadProgress(uint64 position, uint64 size) {
 189 }
 190
 191 bool PluginURLFetcher::OnReceivedRedirect(
 192     const GURL& new_url,
 193     const GURL& new_first_party_for_cookies,
 194     const ResourceResponseInfo& info) {
 195   if (!plugin_stream_)
 196     return false;
 197
 198   // TODO(jam): THIS LOGIC IS COPIED FROM WebPluginImpl::willSendRequest until
 199   // kDirectNPAPIRequests is the default and we can remove the old path there.
 200
 201   // Currently this check is just to catch an https -> http redirect when
 202   // loading the main plugin src URL. Longer term, we could investigate
 203   // firing mixed diplay or scripting issues for subresource loads
 204   // initiated by plug-ins.
 205   if (is_plugin_src_load_ &&
 206       !plugin_stream_->instance()->webplugin()->CheckIfRunInsecureContent(
 207           new_url)) {
 208     plugin_stream_->DidFail(resource_id_);  // That will delete |this|.
 209     return false;
 210   }
 211
 212   // It's unfortunate that this logic of when a redirect's method changes is
 213   // in url_request.cc, but weburlloader_impl.cc and this file have to duplicate
 214   // it instead of passing that information.
 215   int response_code = info.headers->response_code();
 216   if (response_code != 307)
 217     method_ = "GET";
 218   GURL old_url = url_;
 219   url_ = new_url;
 220   first_party_for_cookies_ = new_first_party_for_cookies;
 221
 222   // If the plugin does not participate in url redirect notifications then just
 223   // block cross origin 307 POST redirects.
 224   if (!notify_redirects_) {
 225     if (response_code == 307 && method_ == "POST" &&
 226         old_url.GetOrigin() != new_url.GetOrigin()) {
 227       plugin_stream_->DidFail(resource_id_);  // That will delete |this|.
 228       return false;
 229     }
 230   } else {
 231     // Pause the request while we ask the plugin what to do about the redirect.
 232     bridge_->SetDefersLoading(true);
 233     plugin_stream_->WillSendRequest(url_, response_code);
 234   }
 235
 236   return true;
 237 }
 238
 239 void PluginURLFetcher::OnReceivedResponse(const ResourceResponseInfo& info) {
 240   if (!plugin_stream_)
 241     return;
 242
 243   // TODO(jam): THIS LOGIC IS COPIED FROM WebPluginImpl::didReceiveResponse
 244   // GetAllHeaders, and GetResponseInfo until kDirectNPAPIRequests is the
 245   // default and we can remove the old path there.
 246
 247   bool request_is_seekable = true;
 248   DCHECK(!multipart_delegate_.get());
 249   if (plugin_stream_->seekable()) {
 250     int response_code = info.headers->response_code();
 251     if (response_code == 206) {
 252       blink::WebURLResponse response;
 253       response.initialize();
 254       WebURLLoaderImpl::PopulateURLResponse(url_, info, &response);
 255
 256       std::string multipart_boundary;
 257       if (webkit_glue::MultipartResponseDelegate::ReadMultipartBoundary(
 258               response, &multipart_boundary)) {
 259         plugin_stream_->instance()->webplugin()->DidStartLoading();
 260
 261         MultiPartResponseClient* multi_part_response_client =
 262             new MultiPartResponseClient(plugin_stream_);
 263
 264         multipart_delegate_.reset(new webkit_glue::MultipartResponseDelegate(
 265             multi_part_response_client, NULL, response, multipart_boundary));
 266
 267         // Multiple ranges requested, data will be delivered by
 268         // MultipartResponseDelegate.
 269         data_offset_ = 0;
 270         return;
 271       }
 272
 273       int64 upper_bound = 0, instance_size = 0;
 274       // Single range requested - go through original processing for
 275       // non-multipart requests, but update data offset.
 276       webkit_glue::MultipartResponseDelegate::ReadContentRanges(
 277           response, &data_offset_, &upper_bound, &instance_size);
 278     } else if (response_code == 200) {
 279       // TODO: should we handle this case? We used to but it's not clear that we
 280       // still need to. This was bug 5403, fixed in r7139.
 281     }
 282   }
 283
 284   // If the length comes in as -1, then it indicates that it was not
 285   // read off the HTTP headers. We replicate Safari webkit behavior here,
 286   // which is to set it to 0.
 287   int expected_length = std::max(static_cast<int>(info.content_length), 0);
 288
 289   base::Time temp;
 290   uint32 last_modified = 0;
 291   std::string headers;
 292   if (info.headers) {  // NULL for data: urls.
 293     if (info.headers->GetLastModifiedValue(&temp))
 294       last_modified = static_cast<uint32>(temp.ToDoubleT());
 295
 296      // TODO(darin): Shouldn't we also report HTTP version numbers?
 297     int response_code = info.headers->response_code();
 298     headers = base::StringPrintf("HTTP %d ", response_code);
 299     headers += info.headers->GetStatusText();
 300     headers += "\n";
 301
 302     void* iter = NULL;
 303     std::string name, value;
 304     while (info.headers->EnumerateHeaderLines(&iter, &name, &value)) {
 305       // TODO(darin): Should we really exclude headers with an empty value?
 306       if (!name.empty() && !value.empty())
 307         headers += name + ": " + value + "\n";
 308     }
 309
 310     // Bug http://b/issue?id=925559. The flash plugin would not handle the HTTP
 311     // error codes in the stream header and as a result, was unaware of the fate
 312     // of the HTTP requests issued via NPN_GetURLNotify. Webkit and FF destroy
 313     // the stream and invoke the NPP_DestroyStream function on the plugin if the
 314     // HTTPrequest fails.
 315     if ((url_.SchemeIs("http") || url_.SchemeIs("https")) &&
 316         (response_code < 100 || response_code >= 400)) {
 317       pending_failure_notification_ = true;
 318     }
 319   }
 320
 321   plugin_stream_->DidReceiveResponse(info.mime_type,
 322                                      headers,
 323                                      expected_length,
 324                                      last_modified,
 325                                      request_is_seekable);
 326 }
 327
 328 void PluginURLFetcher::OnDownloadedData(int len,
 329                                         int encoded_data_length) {
 330 }
 331
 332 void PluginURLFetcher::OnReceivedData(const char* data,
 333                                       int data_length,
 334                                       int encoded_data_length) {
 335   if (!plugin_stream_)
 336     return;
 337
 338   if (multipart_delegate_) {
 339     multipart_delegate_->OnReceivedData(data, data_length, encoded_data_length);
 340   } else {
 341     int64 offset = data_offset_;
 342     data_offset_ += data_length;
 343
 344     if (copy_stream_data_) {
 345       // QuickTime writes to this memory, and since we got it from
 346       // ResourceDispatcher it's not mapped for write access in this process.
 347       // http://crbug.com/308466.
 348       scoped_ptr<char[]> data_copy(new char[data_length]);
 349       memcpy(data_copy.get(), data, data_length);
 350       plugin_stream_->DidReceiveData(data_copy.get(), data_length, offset);
 351     } else {
 352       plugin_stream_->DidReceiveData(data, data_length, offset);
 353     }
 354     // DANGER: this instance may be deleted at this point.
 355   }
 356 }
 357
 358 void PluginURLFetcher::OnCompletedRequest(
 359     int error_code,
 360     bool was_ignored_by_handler,
 361     bool stale_copy_in_cache,
 362     const std::string& security_info,
 363     const base::TimeTicks& completion_time,
 364     int64 total_transfer_size) {
 365   if (!plugin_stream_)
 366     return;
 367
 368   if (multipart_delegate_) {
 369     multipart_delegate_->OnCompletedRequest();
 370     multipart_delegate_.reset();
 371   }
 372
 373   if (error_code == net::OK) {
 374     plugin_stream_->DidFinishLoading(resource_id_);
 375   } else {
 376     plugin_stream_->DidFail(resource_id_);
 377   }
 378 }
 379
 380 }  // namespace content