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