content/child/appcache/web_application_cache_host_impl.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 "content/child/appcache/web_application_cache_host_impl.h"
   6
   7 #include "base/compiler_specific.h"
   8 #include "base/id_map.h"
   9 #include "base/strings/string_util.h"
  10 #include "base/strings/stringprintf.h"
  11 #include "third_party/WebKit/public/platform/WebString.h"
  12 #include "third_party/WebKit/public/platform/WebURL.h"
  13 #include "third_party/WebKit/public/platform/WebURLRequest.h"
  14 #include "third_party/WebKit/public/platform/WebURLResponse.h"
  15
  16 using blink::WebApplicationCacheHost;
  17 using blink::WebApplicationCacheHostClient;
  18 using blink::WebString;
  19 using blink::WebURLRequest;
  20 using blink::WebURL;
  21 using blink::WebURLResponse;
  22 using blink::WebVector;
  23
  24 namespace content {
  25
  26 namespace {
  27
  28 // Note: the order of the elements in this array must match those
  29 // of the EventID enum in appcache_interfaces.h.
  30 const char* kEventNames[] = {
  31   "Checking", "Error", "NoUpdate", "Downloading", "Progress",
  32   "UpdateReady", "Cached", "Obsolete"
  33 };
  34
  35 typedef IDMap<WebApplicationCacheHostImpl> HostsMap;
  36
  37 HostsMap* all_hosts() {
  38   static HostsMap* map = new HostsMap;
  39   return map;
  40 }
  41
  42 GURL ClearUrlRef(const GURL& url) {
  43   if (!url.has_ref())
  44     return url;
  45   GURL::Replacements replacements;
  46   replacements.ClearRef();
  47   return url.ReplaceComponents(replacements);
  48 }
  49
  50 }  // anon namespace
  51
  52 WebApplicationCacheHostImpl* WebApplicationCacheHostImpl::FromId(int id) {
  53   return all_hosts()->Lookup(id);
  54 }
  55
  56 WebApplicationCacheHostImpl::WebApplicationCacheHostImpl(
  57     WebApplicationCacheHostClient* client,
  58     AppCacheBackend* backend)
  59     : client_(client),
  60       backend_(backend),
  61       host_id_(all_hosts()->Add(this)),
  62       status_(APPCACHE_STATUS_UNCACHED),
  63       is_scheme_supported_(false),
  64       is_get_method_(false),
  65       is_new_master_entry_(MAYBE),
  66       was_select_cache_called_(false) {
  67   DCHECK(client && backend && (host_id_ != kAppCacheNoHostId));
  68
  69   backend_->RegisterHost(host_id_);
  70 }
  71
  72 WebApplicationCacheHostImpl::~WebApplicationCacheHostImpl() {
  73   backend_->UnregisterHost(host_id_);
  74   all_hosts()->Remove(host_id_);
  75 }
  76
  77 void WebApplicationCacheHostImpl::OnCacheSelected(
  78     const AppCacheInfo& info) {
  79   cache_info_ = info;
  80   client_->didChangeCacheAssociation();
  81 }
  82
  83 void WebApplicationCacheHostImpl::OnStatusChanged(
  84     AppCacheStatus status) {
  85   // TODO(michaeln): delete me, not used
  86 }
  87
  88 void WebApplicationCacheHostImpl::OnEventRaised(
  89     AppCacheEventID event_id) {
  90   DCHECK(event_id !=
  91          APPCACHE_PROGRESS_EVENT);  // See OnProgressEventRaised.
  92   DCHECK(event_id != APPCACHE_ERROR_EVENT); // See OnErrorEventRaised.
  93
  94   // Emit logging output prior to calling out to script as we can get
  95   // deleted within the script event handler.
  96   const char* kFormatString = "Application Cache %s event";
  97   std::string message = base::StringPrintf(kFormatString,
  98                                            kEventNames[event_id]);
  99   OnLogMessage(APPCACHE_LOG_INFO, message);
 100
 101   switch (event_id) {
 102     case APPCACHE_CHECKING_EVENT:
 103       status_ = APPCACHE_STATUS_CHECKING;
 104       break;
 105     case APPCACHE_DOWNLOADING_EVENT:
 106       status_ = APPCACHE_STATUS_DOWNLOADING;
 107       break;
 108     case APPCACHE_UPDATE_READY_EVENT:
 109       status_ = APPCACHE_STATUS_UPDATE_READY;
 110       break;
 111     case APPCACHE_CACHED_EVENT:
 112     case APPCACHE_NO_UPDATE_EVENT:
 113       status_ = APPCACHE_STATUS_IDLE;
 114       break;
 115     case APPCACHE_OBSOLETE_EVENT:
 116       status_ = APPCACHE_STATUS_OBSOLETE;
 117       break;
 118     default:
 119       NOTREACHED();
 120       break;
 121   }
 122
 123   client_->notifyEventListener(static_cast<EventID>(event_id));
 124 }
 125
 126 void WebApplicationCacheHostImpl::OnProgressEventRaised(
 127     const GURL& url, int num_total, int num_complete) {
 128   // Emit logging output prior to calling out to script as we can get
 129   // deleted within the script event handler.
 130   const char* kFormatString = "Application Cache Progress event (%d of %d) %s";
 131   std::string message = base::StringPrintf(kFormatString, num_complete,
 132                                            num_total, url.spec().c_str());
 133   OnLogMessage(APPCACHE_LOG_INFO, message);
 134   status_ = APPCACHE_STATUS_DOWNLOADING;
 135   client_->notifyProgressEventListener(url, num_total, num_complete);
 136 }
 137
 138 void WebApplicationCacheHostImpl::OnErrorEventRaised(
 139     const AppCacheErrorDetails& details) {
 140   // Emit logging output prior to calling out to script as we can get
 141   // deleted within the script event handler.
 142   const char* kFormatString = "Application Cache Error event: %s";
 143   std::string full_message =
 144       base::StringPrintf(kFormatString, details.message.c_str());
 145   OnLogMessage(APPCACHE_LOG_ERROR, full_message);
 146
 147   status_ = cache_info_.is_complete ? APPCACHE_STATUS_IDLE :
 148       APPCACHE_STATUS_UNCACHED;
 149   if (details.is_cross_origin) {
 150     // Don't leak detailed information to script for cross-origin resources.
 151     DCHECK_EQ(APPCACHE_RESOURCE_ERROR, details.reason);
 152     client_->notifyErrorEventListener(
 153         static_cast<ErrorReason>(details.reason), details.url, 0, WebString());
 154   } else {
 155     client_->notifyErrorEventListener(static_cast<ErrorReason>(details.reason),
 156                                       details.url,
 157                                       details.status,
 158                                       WebString::fromUTF8(details.message));
 159   }
 160 }
 161
 162 void WebApplicationCacheHostImpl::willStartMainResourceRequest(
 163     WebURLRequest& request, const WebApplicationCacheHost* spawning_host) {
 164   request.setAppCacheHostID(host_id_);
 165
 166   original_main_resource_url_ = ClearUrlRef(request.url());
 167
 168   std::string method = request.httpMethod().utf8();
 169   is_get_method_ = (method == kHttpGETMethod);
 170   DCHECK(method == StringToUpperASCII(method));
 171
 172   const WebApplicationCacheHostImpl* spawning_host_impl =
 173       static_cast<const WebApplicationCacheHostImpl*>(spawning_host);
 174   if (spawning_host_impl && (spawning_host_impl != this) &&
 175       (spawning_host_impl->status_ != APPCACHE_STATUS_UNCACHED)) {
 176     backend_->SetSpawningHostId(host_id_, spawning_host_impl->host_id());
 177   }
 178 }
 179
 180 void WebApplicationCacheHostImpl::willStartSubResourceRequest(
 181     WebURLRequest& request) {
 182   request.setAppCacheHostID(host_id_);
 183 }
 184
 185 void WebApplicationCacheHostImpl::selectCacheWithoutManifest() {
 186   if (was_select_cache_called_)
 187     return;
 188   was_select_cache_called_ = true;
 189
 190   status_ = (document_response_.appCacheID() == kAppCacheNoCacheId) ?
 191       APPCACHE_STATUS_UNCACHED : APPCACHE_STATUS_CHECKING;
 192   is_new_master_entry_ = NO;
 193   backend_->SelectCache(host_id_, document_url_,
 194                         document_response_.appCacheID(),
 195                         GURL());
 196 }
 197
 198 bool WebApplicationCacheHostImpl::selectCacheWithManifest(
 199     const WebURL& manifest_url) {
 200   if (was_select_cache_called_)
 201     return true;
 202   was_select_cache_called_ = true;
 203
 204   GURL manifest_gurl(ClearUrlRef(manifest_url));
 205
 206   // 6.9.6 The application cache selection algorithm
 207   // Check for new 'master' entries.
 208   if (document_response_.appCacheID() == kAppCacheNoCacheId) {
 209     if (is_scheme_supported_ && is_get_method_ &&
 210         (manifest_gurl.GetOrigin() == document_url_.GetOrigin())) {
 211       status_ = APPCACHE_STATUS_CHECKING;
 212       is_new_master_entry_ = YES;
 213     } else {
 214       status_ = APPCACHE_STATUS_UNCACHED;
 215       is_new_master_entry_ = NO;
 216       manifest_gurl = GURL();
 217     }
 218     backend_->SelectCache(
 219         host_id_, document_url_, kAppCacheNoCacheId, manifest_gurl);
 220     return true;
 221   }
 222
 223   DCHECK_EQ(NO, is_new_master_entry_);
 224
 225   // 6.9.6 The application cache selection algorithm
 226   // Check for 'foreign' entries.
 227   GURL document_manifest_gurl(document_response_.appCacheManifestURL());
 228   if (document_manifest_gurl != manifest_gurl) {
 229     backend_->MarkAsForeignEntry(host_id_, document_url_,
 230                                  document_response_.appCacheID());
 231     status_ = APPCACHE_STATUS_UNCACHED;
 232     return false;  // the navigation will be restarted
 233   }
 234
 235   status_ = APPCACHE_STATUS_CHECKING;
 236
 237   // Its a 'master' entry thats already in the cache.
 238   backend_->SelectCache(host_id_, document_url_,
 239                         document_response_.appCacheID(),
 240                         manifest_gurl);
 241   return true;
 242 }
 243
 244 void WebApplicationCacheHostImpl::didReceiveResponseForMainResource(
 245     const WebURLResponse& response) {
 246   document_response_ = response;
 247   document_url_ = ClearUrlRef(document_response_.url());
 248   if (document_url_ != original_main_resource_url_)
 249     is_get_method_ = true;  // A redirect was involved.
 250   original_main_resource_url_ = GURL();
 251
 252   is_scheme_supported_ =  IsSchemeSupportedForAppCache(document_url_);
 253   if ((document_response_.appCacheID() != kAppCacheNoCacheId) ||
 254       !is_scheme_supported_ || !is_get_method_)
 255     is_new_master_entry_ = NO;
 256 }
 257
 258 void WebApplicationCacheHostImpl::didReceiveDataForMainResource(
 259     const char* data, unsigned len) {
 260   if (is_new_master_entry_ == NO)
 261     return;
 262   // TODO(michaeln): write me
 263 }
 264
 265 void WebApplicationCacheHostImpl::didFinishLoadingMainResource(bool success) {
 266   if (is_new_master_entry_ == NO)
 267     return;
 268   // TODO(michaeln): write me
 269 }
 270
 271 WebApplicationCacheHost::Status WebApplicationCacheHostImpl::status() {
 272   return static_cast<WebApplicationCacheHost::Status>(status_);
 273 }
 274
 275 bool WebApplicationCacheHostImpl::startUpdate() {
 276   if (!backend_->StartUpdate(host_id_))
 277     return false;
 278   if (status_ == APPCACHE_STATUS_IDLE ||
 279       status_ == APPCACHE_STATUS_UPDATE_READY)
 280     status_ = APPCACHE_STATUS_CHECKING;
 281   else
 282     status_ = backend_->GetStatus(host_id_);
 283   return true;
 284 }
 285
 286 bool WebApplicationCacheHostImpl::swapCache() {
 287   if (!backend_->SwapCache(host_id_))
 288     return false;
 289   status_ = backend_->GetStatus(host_id_);
 290   return true;
 291 }
 292
 293 void WebApplicationCacheHostImpl::getAssociatedCacheInfo(
 294     WebApplicationCacheHost::CacheInfo* info) {
 295   info->manifestURL = cache_info_.manifest_url;
 296   if (!cache_info_.is_complete)
 297     return;
 298   info->creationTime = cache_info_.creation_time.ToDoubleT();
 299   info->updateTime = cache_info_.last_update_time.ToDoubleT();
 300   info->totalSize = cache_info_.size;
 301 }
 302
 303 void WebApplicationCacheHostImpl::getResourceList(
 304     WebVector<ResourceInfo>* resources) {
 305   if (!cache_info_.is_complete)
 306     return;
 307   std::vector<AppCacheResourceInfo> resource_infos;
 308   backend_->GetResourceList(host_id_, &resource_infos);
 309
 310   WebVector<ResourceInfo> web_resources(resource_infos.size());
 311   for (size_t i = 0; i < resource_infos.size(); ++i) {
 312     web_resources[i].size = resource_infos[i].size;
 313     web_resources[i].isMaster = resource_infos[i].is_master;
 314     web_resources[i].isExplicit = resource_infos[i].is_explicit;
 315     web_resources[i].isManifest = resource_infos[i].is_manifest;
 316     web_resources[i].isForeign = resource_infos[i].is_foreign;
 317     web_resources[i].isFallback = resource_infos[i].is_fallback;
 318     web_resources[i].url = resource_infos[i].url;
 319   }
 320   resources->swap(web_resources);
 321 }
 322
 323 }  // namespace content