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chromium / chromium / src / a2a780d05d3392b341cafb6e1329ce006239035e / . / content / browser / appcache / appcache_update_job.cc
blob: 3eaa0a94ae6365289e6bc07284911153d62c02ef [file] [log] [blame]
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/browser/appcache/appcache_update_job.h"
#include "base/bind.h"
#include "base/bind_helpers.h"
#include "base/compiler_specific.h"
#include "base/location.h"
#include "base/single_thread_task_runner.h"
#include "base/strings/string_util.h"
#include "base/strings/stringprintf.h"
#include "base/threading/thread_task_runner_handle.h"
#include "content/browser/appcache/appcache_group.h"
#include "content/browser/appcache/appcache_histograms.h"
#include "content/browser/appcache/appcache_update_url_fetcher.h"
#include "content/browser/appcache/appcache_update_url_loader_request.h"
#include "content/public/browser/browser_thread.h"
#include "net/base/io_buffer.h"
#include "net/base/load_flags.h"
#include "net/base/net_errors.h"
#include "net/base/request_priority.h"
#include "third_party/blink/public/mojom/appcache/appcache.mojom.h"
#include "third_party/blink/public/mojom/devtools/console_message.mojom.h"
#include "url/origin.h"
namespace content {
namespace {
const int kAppCacheFetchBufferSize = 32768;
const size_t kMaxConcurrentUrlFetches = 2;
std::string FormatUrlErrorMessage(
const char* format, const GURL& url,
AppCacheUpdateJob::ResultType error,
int response_code) {
// Show the net response code if we have one.
int code = response_code;
if (error != AppCacheUpdateJob::SERVER_ERROR)
code = static_cast<int>(error);
return base::StringPrintf(format, code, url.spec().c_str());
}
bool IsEvictableError(AppCacheUpdateJob::ResultType result,
const blink::mojom::AppCacheErrorDetails& details) {
switch (result) {
case AppCacheUpdateJob::DB_ERROR:
case AppCacheUpdateJob::DISKCACHE_ERROR:
case AppCacheUpdateJob::QUOTA_ERROR:
case AppCacheUpdateJob::NETWORK_ERROR:
case AppCacheUpdateJob::CANCELLED_ERROR:
return false;
case AppCacheUpdateJob::REDIRECT_ERROR:
case AppCacheUpdateJob::SERVER_ERROR:
case AppCacheUpdateJob::SECURITY_ERROR:
return true;
case AppCacheUpdateJob::MANIFEST_ERROR:
return details.reason ==
blink::mojom::AppCacheErrorReason::APPCACHE_SIGNATURE_ERROR;
default:
NOTREACHED();
return true;
}
}
bool CanUseExistingResource(const net::HttpResponseInfo* http_info) {
// Check HTTP caching semantics based on max-age and expiration headers.
if (!http_info->headers || http_info->headers->RequiresValidation(
http_info->request_time,
http_info->response_time, base::Time::Now())) {
return false;
}
// Responses with a "vary" header generally get treated as expired,
// but we special case the "Origin" header since we know it's invariant.
// Also, content decoding is handled by the network library, the appcache
// stores decoded response bodies, so we can safely ignore varying on
// the "Accept-Encoding" header.
std::string value;
size_t iter = 0;
while (http_info->headers->EnumerateHeader(&iter, "vary", &value)) {
if (!base::EqualsCaseInsensitiveASCII(value, "Accept-Encoding") &&
!base::EqualsCaseInsensitiveASCII(value, "Origin")) {
return false;
}
}
return true;
}
void EmptyCompletionCallback(int result) {}
} // namespace
// Helper class for collecting hosts per frontend when sending notifications
// so that only one notification is sent for all hosts using the same frontend.
class HostNotifier {
public:
using AppCacheFrontend = blink::mojom::AppCacheFrontend;
using HostIds = std::vector<int>;
using NotifyHostMap = std::map<AppCacheFrontend*, HostIds>;
// Caller is responsible for ensuring there will be no duplicate hosts.
void AddHost(AppCacheHost* host) {
std::pair<NotifyHostMap::iterator, bool> ret = hosts_to_notify_.insert(
NotifyHostMap::value_type(host->frontend(), HostIds()));
ret.first->second.push_back(host->host_id());
}
void AddHosts(const std::set<AppCacheHost*>& hosts) {
for (AppCacheHost* host : hosts)
AddHost(host);
}
void SendNotifications(blink::mojom::AppCacheEventID event_id) {
for (auto& pair : hosts_to_notify_) {
AppCacheFrontend* frontend = pair.first;
frontend->EventRaised(pair.second, event_id);
}
}
void SendProgressNotifications(const GURL& url,
int num_total,
int num_complete) {
for (const auto& pair : hosts_to_notify_) {
AppCacheFrontend* frontend = pair.first;
frontend->ProgressEventRaised(pair.second, url, num_total, num_complete);
}
}
void SendErrorNotifications(
const blink::mojom::AppCacheErrorDetails& details) {
DCHECK(!details.message.empty());
for (const auto& pair : hosts_to_notify_) {
AppCacheFrontend* frontend = pair.first;
frontend->ErrorEventRaised(pair.second, details.Clone());
}
}
void SendLogMessage(const std::string& message) {
for (const auto& pair : hosts_to_notify_) {
AppCacheFrontend* frontend = pair.first;
for (const auto& id : pair.second)
frontend->LogMessage(id, blink::mojom::ConsoleMessageLevel::kWarning,
message);
}
}
private:
NotifyHostMap hosts_to_notify_;
};
AppCacheUpdateJob::UrlToFetch::UrlToFetch(const GURL& url,
bool checked,
AppCacheResponseInfo* info)
: url(url),
storage_checked(checked),
existing_response_info(info) {
}
AppCacheUpdateJob::UrlToFetch::UrlToFetch(const UrlToFetch& other) = default;
AppCacheUpdateJob::UrlToFetch::~UrlToFetch() {
}
AppCacheUpdateJob::AppCacheUpdateJob(AppCacheServiceImpl* service,
AppCacheGroup* group)
: service_(service),
manifest_url_(group->manifest_url()),
group_(group),
update_type_(UNKNOWN_TYPE),
internal_state_(FETCH_MANIFEST),
doing_full_update_check_(false),
master_entries_completed_(0),
url_fetches_completed_(0),
manifest_fetcher_(nullptr),
manifest_has_valid_mime_type_(false),
stored_state_(UNSTORED),
storage_(service->storage()),
weak_factory_(this) {
service_->AddObserver(this);
}
AppCacheUpdateJob::~AppCacheUpdateJob() {
if (service_)
service_->RemoveObserver(this);
if (internal_state_ != COMPLETED)
Cancel();
DCHECK(!inprogress_cache_.get());
DCHECK(pending_master_entries_.empty());
// The job must not outlive any of its fetchers.
CHECK(!manifest_fetcher_);
CHECK(pending_url_fetches_.empty());
CHECK(master_entry_fetches_.empty());
if (group_)
group_->SetUpdateAppCacheStatus(AppCacheGroup::IDLE);
}
void AppCacheUpdateJob::StartUpdate(AppCacheHost* host,
const GURL& new_master_resource) {
DCHECK(group_->update_job() == this);
DCHECK(!group_->is_obsolete());
bool is_new_pending_master_entry = false;
if (!new_master_resource.is_empty()) {
DCHECK(new_master_resource == host->pending_master_entry_url());
DCHECK(!new_master_resource.has_ref());
DCHECK(new_master_resource.GetOrigin() == manifest_url_.GetOrigin());
if (base::ContainsKey(failed_master_entries_, new_master_resource))
return;
// Cannot add more to this update if already terminating.
if (IsTerminating()) {
group_->QueueUpdate(host, new_master_resource);
return;
}
std::pair<PendingMasters::iterator, bool> ret =
pending_master_entries_.insert(
PendingMasters::value_type(new_master_resource, PendingHosts()));
is_new_pending_master_entry = ret.second;
ret.first->second.push_back(host);
host->AddObserver(this);
}
// Notify host (if any) if already checking or downloading.
AppCacheGroup::UpdateAppCacheStatus update_status = group_->update_status();
if (update_status == AppCacheGroup::CHECKING ||
update_status == AppCacheGroup::DOWNLOADING) {
if (host) {
NotifySingleHost(host,
blink::mojom::AppCacheEventID::APPCACHE_CHECKING_EVENT);
if (update_status == AppCacheGroup::DOWNLOADING)
NotifySingleHost(
host, blink::mojom::AppCacheEventID::APPCACHE_DOWNLOADING_EVENT);
// Add to fetch list or an existing entry if already fetched.
if (!new_master_resource.is_empty()) {
AddMasterEntryToFetchList(host, new_master_resource,
is_new_pending_master_entry);
}
}
return;
}
// Begin update process for the group.
MadeProgress();
group_->SetUpdateAppCacheStatus(AppCacheGroup::CHECKING);
if (group_->HasCache()) {
base::TimeDelta kFullUpdateInterval = base::TimeDelta::FromHours(24);
update_type_ = UPGRADE_ATTEMPT;
base::TimeDelta time_since_last_check =
base::Time::Now() - group_->last_full_update_check_time();
doing_full_update_check_ = time_since_last_check > kFullUpdateInterval;
NotifyAllAssociatedHosts(
blink::mojom::AppCacheEventID::APPCACHE_CHECKING_EVENT);
} else {
update_type_ = CACHE_ATTEMPT;
doing_full_update_check_ = true;
DCHECK(host);
NotifySingleHost(host,
blink::mojom::AppCacheEventID::APPCACHE_CHECKING_EVENT);
}
if (!new_master_resource.is_empty()) {
AddMasterEntryToFetchList(host, new_master_resource,
is_new_pending_master_entry);
}
BrowserThread::PostAfterStartupTask(
FROM_HERE, base::ThreadTaskRunnerHandle::Get(),
base::BindOnce(&AppCacheUpdateJob::FetchManifest,
weak_factory_.GetWeakPtr(), true));
}
std::unique_ptr<AppCacheResponseWriter>
AppCacheUpdateJob::CreateResponseWriter() {
std::unique_ptr<AppCacheResponseWriter> writer =
storage_->CreateResponseWriter(manifest_url_);
stored_response_ids_.push_back(writer->response_id());
return writer;
}
void AppCacheUpdateJob::HandleCacheFailure(
const blink::mojom::AppCacheErrorDetails& error_details,
ResultType result,
const GURL& failed_resource_url) {
// 6.9.4 cache failure steps 2-8.
DCHECK(internal_state_ != CACHE_FAILURE);
DCHECK(!error_details.message.empty());
DCHECK(result != UPDATE_OK);
internal_state_ = CACHE_FAILURE;
LogHistogramStats(result, failed_resource_url);
CancelAllUrlFetches();
CancelAllMasterEntryFetches(error_details);
NotifyAllError(error_details);
DiscardInprogressCache();
internal_state_ = COMPLETED;
if (update_type_ == CACHE_ATTEMPT ||
!IsEvictableError(result, error_details) ||
service_->storage() != storage_) {
DeleteSoon();
return;
}
if (group_->first_evictable_error_time().is_null()) {
group_->set_first_evictable_error_time(base::Time::Now());
storage_->StoreEvictionTimes(group_);
DeleteSoon();
return;
}
base::TimeDelta kMaxEvictableErrorDuration = base::TimeDelta::FromDays(14);
base::TimeDelta error_duration =
base::Time::Now() - group_->first_evictable_error_time();
if (error_duration > kMaxEvictableErrorDuration) {
// Break the connection with the group prior to calling
// DeleteAppCacheGroup, otherwise that method would delete |this|
// and we need the stack to unwind prior to deletion.
group_->SetUpdateAppCacheStatus(AppCacheGroup::IDLE);
group_ = nullptr;
service_->DeleteAppCacheGroup(manifest_url_,
base::BindOnce(EmptyCompletionCallback));
}
DeleteSoon(); // To unwind the stack prior to deletion.
}
void AppCacheUpdateJob::FetchManifest(bool is_first_fetch) {
DCHECK(!manifest_fetcher_);
manifest_fetcher_ =
new URLFetcher(manifest_url_,
is_first_fetch ? URLFetcher::MANIFEST_FETCH
: URLFetcher::MANIFEST_REFETCH,
this, kAppCacheFetchBufferSize);
if (is_first_fetch) {
// Maybe load the cached headers to make a condiditional request.
AppCacheEntry* entry =
(update_type_ == UPGRADE_ATTEMPT)
? group_->newest_complete_cache()->GetEntry(manifest_url_)
: nullptr;
if (entry && !doing_full_update_check_) {
// Asynchronously load response info for manifest from newest cache.
storage_->LoadResponseInfo(manifest_url_, entry->response_id(), this);
return;
}
manifest_fetcher_->Start();
return;
}
DCHECK(internal_state_ == REFETCH_MANIFEST);
DCHECK(manifest_response_info_.get());
manifest_fetcher_->set_existing_response_headers(
manifest_response_info_->headers.get());
manifest_fetcher_->Start();
}
void AppCacheUpdateJob::HandleManifestFetchCompleted(URLFetcher* fetcher,
int net_error) {
DCHECK_EQ(internal_state_, FETCH_MANIFEST);
DCHECK_EQ(manifest_fetcher_, fetcher);
manifest_fetcher_ = nullptr;
UpdateURLLoaderRequest* request = fetcher->request();
int response_code = -1;
bool is_valid_response_code = false;
if (net_error == net::OK) {
response_code = request->GetResponseCode();
is_valid_response_code = (response_code / 100 == 2);
std::string mime_type = request->GetMimeType();
manifest_has_valid_mime_type_ = (mime_type == "text/cache-manifest");
}
if (is_valid_response_code) {
manifest_data_ = fetcher->manifest_data();
manifest_response_info_.reset(
new net::HttpResponseInfo(request->GetResponseInfo()));
if (update_type_ == UPGRADE_ATTEMPT)
CheckIfManifestChanged(); // continues asynchronously
else
ContinueHandleManifestFetchCompleted(true);
} else if (response_code == 304 && update_type_ == UPGRADE_ATTEMPT) {
ContinueHandleManifestFetchCompleted(false);
} else if ((response_code == 404 || response_code == 410) &&
update_type_ == UPGRADE_ATTEMPT) {
storage_->MakeGroupObsolete(group_, this, response_code); // async
} else {
const char kFormatString[] = "Manifest fetch failed (%d) %s";
std::string message = FormatUrlErrorMessage(
kFormatString, manifest_url_, fetcher->result(), response_code);
HandleCacheFailure(
blink::mojom::AppCacheErrorDetails(
message, blink::mojom::AppCacheErrorReason::APPCACHE_MANIFEST_ERROR,
manifest_url_, response_code, false /*is_cross_origin*/),
fetcher->result(), GURL());
}
}
void AppCacheUpdateJob::OnGroupMadeObsolete(AppCacheGroup* group,
bool success,
int response_code) {
DCHECK(master_entry_fetches_.empty());
CancelAllMasterEntryFetches(blink::mojom::AppCacheErrorDetails(
"The cache has been made obsolete, "
"the manifest file returned 404 or 410",
blink::mojom::AppCacheErrorReason::APPCACHE_MANIFEST_ERROR, GURL(),
response_code, false /*is_cross_origin*/));
if (success) {
DCHECK(group->is_obsolete());
NotifyAllAssociatedHosts(
blink::mojom::AppCacheEventID::APPCACHE_OBSOLETE_EVENT);
internal_state_ = COMPLETED;
MaybeCompleteUpdate();
} else {
// Treat failure to mark group obsolete as a cache failure.
HandleCacheFailure(
blink::mojom::AppCacheErrorDetails(
"Failed to mark the cache as obsolete",
blink::mojom::AppCacheErrorReason::APPCACHE_UNKNOWN_ERROR, GURL(),
0, false /*is_cross_origin*/),
DB_ERROR, GURL());
}
}
void AppCacheUpdateJob::ContinueHandleManifestFetchCompleted(bool changed) {
DCHECK(internal_state_ == FETCH_MANIFEST);
if (!changed) {
DCHECK(update_type_ == UPGRADE_ATTEMPT);
internal_state_ = NO_UPDATE;
// Wait for pending master entries to download.
FetchMasterEntries();
MaybeCompleteUpdate(); // if not done, run async 6.9.4 step 7 substeps
return;
}
AppCacheManifest manifest;
if (!ParseManifest(manifest_url_, manifest_data_.data(),
manifest_data_.length(),
manifest_has_valid_mime_type_
? PARSE_MANIFEST_ALLOWING_DANGEROUS_FEATURES
: PARSE_MANIFEST_PER_STANDARD,
manifest)) {
const char kFormatString[] = "Failed to parse manifest %s";
const std::string message = base::StringPrintf(kFormatString,
manifest_url_.spec().c_str());
HandleCacheFailure(
blink::mojom::AppCacheErrorDetails(
message,
blink::mojom::AppCacheErrorReason::APPCACHE_SIGNATURE_ERROR, GURL(),
0, false /*is_cross_origin*/),
MANIFEST_ERROR, GURL());
VLOG(1) << message;
return;
}
// Proceed with update process. Section 6.9.4 steps 8-20.
internal_state_ = DOWNLOADING;
inprogress_cache_ = new AppCache(storage_, storage_->NewCacheId());
BuildUrlFileList(manifest);
inprogress_cache_->InitializeWithManifest(&manifest);
// Associate all pending master hosts with the newly created cache.
for (const auto& pair : pending_master_entries_) {
const PendingHosts& hosts = pair.second;
for (AppCacheHost* host : hosts) {
host->AssociateIncompleteCache(inprogress_cache_.get(), manifest_url_);
}
}
// Warn about dangerous features being ignored due to the wrong content-type
// Must be done after associating all pending master hosts.
if (manifest.did_ignore_intercept_namespaces) {
std::string message(
"Ignoring the INTERCEPT section of the application cache manifest "
"because the content type is not text/cache-manifest");
LogConsoleMessageToAll(message);
}
if (manifest.did_ignore_fallback_namespaces) {
std::string message(
"Ignoring out of scope FALLBACK entries of the application cache "
"manifest because the content-type is not text/cache-manifest");
LogConsoleMessageToAll(message);
}
group_->SetUpdateAppCacheStatus(AppCacheGroup::DOWNLOADING);
NotifyAllAssociatedHosts(
blink::mojom::AppCacheEventID::APPCACHE_DOWNLOADING_EVENT);
FetchUrls();
FetchMasterEntries();
MaybeCompleteUpdate(); // if not done, continues when async fetches complete
}
void AppCacheUpdateJob::HandleUrlFetchCompleted(URLFetcher* fetcher,
int net_error) {
DCHECK(internal_state_ == DOWNLOADING);
UpdateURLLoaderRequest* request = fetcher->request();
const GURL& url = request->GetURL();
pending_url_fetches_.erase(url);
NotifyAllProgress(url);
++url_fetches_completed_;
int response_code = net_error == net::OK ? request->GetResponseCode()
: fetcher->redirect_response_code();
AppCacheEntry& entry = url_file_list_.find(url)->second;
if (response_code / 100 == 2) {
// Associate storage with the new entry.
DCHECK(fetcher->response_writer());
entry.set_response_id(fetcher->response_writer()->response_id());
entry.set_response_size(fetcher->response_writer()->amount_written());
if (!inprogress_cache_->AddOrModifyEntry(url, entry))
duplicate_response_ids_.push_back(entry.response_id());
// TODO(michaeln): Check for <html manifest=xxx>
// See http://code.google.com/p/chromium/issues/detail?id=97930
// if (entry.IsMaster() && !(entry.IsExplicit() || fallback || intercept))
// if (!manifestAttribute) skip it
// Foreign entries will be detected during cache selection.
// Note: 6.9.4, step 17.9 possible optimization: if resource is HTML or XML
// file whose root element is an html element with a manifest attribute
// whose value doesn't match the manifest url of the application cache
// being processed, mark the entry as being foreign.
} else {
VLOG(1) << "Request error: " << net_error
<< " response code: " << response_code;
if (entry.IsExplicit() || entry.IsFallback() || entry.IsIntercept()) {
if (response_code == 304 && fetcher->existing_entry().has_response_id()) {
// Keep the existing response.
entry.set_response_id(fetcher->existing_entry().response_id());
entry.set_response_size(fetcher->existing_entry().response_size());
inprogress_cache_->AddOrModifyEntry(url, entry);
} else {
const char kFormatString[] = "Resource fetch failed (%d) %s";
std::string message = FormatUrlErrorMessage(
kFormatString, url, fetcher->result(), response_code);
ResultType result = fetcher->result();
bool is_cross_origin = url.GetOrigin() != manifest_url_.GetOrigin();
switch (result) {
case DISKCACHE_ERROR:
HandleCacheFailure(
blink::mojom::AppCacheErrorDetails(
message,
blink::mojom::AppCacheErrorReason::APPCACHE_UNKNOWN_ERROR,
GURL(), 0, is_cross_origin),
result, url);
break;
case NETWORK_ERROR:
HandleCacheFailure(
blink::mojom::AppCacheErrorDetails(
message,
blink::mojom::AppCacheErrorReason::APPCACHE_RESOURCE_ERROR,
url, 0, is_cross_origin),
result, url);
break;
default:
HandleCacheFailure(
blink::mojom::AppCacheErrorDetails(
message,
blink::mojom::AppCacheErrorReason::APPCACHE_RESOURCE_ERROR,
url, response_code, is_cross_origin),
result, url);
break;
}
return;
}
} else if (response_code == 404 || response_code == 410) {
// Entry is skipped. They are dropped from the cache.
} else if (update_type_ == UPGRADE_ATTEMPT &&
fetcher->existing_entry().has_response_id()) {
// Keep the existing response.
// TODO(michaeln): Not sure this is a good idea. This is spec compliant
// but the old resource may or may not be compatible with the new contents
// of the cache. Impossible to know one way or the other.
entry.set_response_id(fetcher->existing_entry().response_id());
entry.set_response_size(fetcher->existing_entry().response_size());
inprogress_cache_->AddOrModifyEntry(url, entry);
}
}
// Fetch another URL now that one request has completed.
DCHECK(internal_state_ != CACHE_FAILURE);
FetchUrls();
MaybeCompleteUpdate();
}
void AppCacheUpdateJob::HandleMasterEntryFetchCompleted(URLFetcher* fetcher,
int net_error) {
DCHECK(internal_state_ == NO_UPDATE || internal_state_ == DOWNLOADING);
// TODO(jennb): Handle downloads completing during cache failure when update
// no longer fetches master entries directly. For now, we cancel all pending
// master entry fetches when entering cache failure state so this will never
// be called in CACHE_FAILURE state.
UpdateURLLoaderRequest* request = fetcher->request();
const GURL& url = request->GetURL();
master_entry_fetches_.erase(url);
++master_entries_completed_;
int response_code = net_error == net::OK ? request->GetResponseCode() : -1;
auto found = pending_master_entries_.find(url);
DCHECK(found != pending_master_entries_.end());
PendingHosts& hosts = found->second;
// Section 6.9.4. No update case: step 7.3, else step 22.
if (response_code / 100 == 2) {
// Add fetched master entry to the appropriate cache.
AppCache* cache = inprogress_cache_.get() ? inprogress_cache_.get()
: group_->newest_complete_cache();
DCHECK(fetcher->response_writer());
AppCacheEntry master_entry(AppCacheEntry::MASTER,
fetcher->response_writer()->response_id(),
fetcher->response_writer()->amount_written());
if (cache->AddOrModifyEntry(url, master_entry))
added_master_entries_.push_back(url);
else
duplicate_response_ids_.push_back(master_entry.response_id());
// In no-update case, associate host with the newest cache.
if (!inprogress_cache_.get()) {
// TODO(michaeln): defer until the updated cache has been stored
DCHECK(cache == group_->newest_complete_cache());
for (AppCacheHost* host : hosts)
host->AssociateCompleteCache(cache);
}
} else {
HostNotifier host_notifier;
for (AppCacheHost* host : hosts) {
host_notifier.AddHost(host);
// In downloading case, disassociate host from inprogress cache.
if (inprogress_cache_.get())
host->AssociateNoCache(GURL());
host->RemoveObserver(this);
}
hosts.clear();
failed_master_entries_.insert(url);
const char kFormatString[] = "Manifest fetch failed (%d) %s";
std::string message = FormatUrlErrorMessage(
kFormatString, request->GetURL(), fetcher->result(), response_code);
host_notifier.SendErrorNotifications(blink::mojom::AppCacheErrorDetails(
message, blink::mojom::AppCacheErrorReason::APPCACHE_MANIFEST_ERROR,
request->GetURL(), response_code, false /*is_cross_origin*/));
// In downloading case, update result is different if all master entries
// failed vs. only some failing.
if (inprogress_cache_.get()) {
// Only count successful downloads to know if all master entries failed.
pending_master_entries_.erase(found);
--master_entries_completed_;
// Section 6.9.4, step 22.3.
if (update_type_ == CACHE_ATTEMPT && pending_master_entries_.empty()) {
HandleCacheFailure(
blink::mojom::AppCacheErrorDetails(
message,
blink::mojom::AppCacheErrorReason::APPCACHE_MANIFEST_ERROR,
request->GetURL(), response_code, false /*is_cross_origin*/),
fetcher->result(), GURL());
return;
}
}
}
DCHECK(internal_state_ != CACHE_FAILURE);
FetchMasterEntries();
MaybeCompleteUpdate();
}
void AppCacheUpdateJob::HandleManifestRefetchCompleted(URLFetcher* fetcher,
int net_error) {
DCHECK(internal_state_ == REFETCH_MANIFEST);
DCHECK(manifest_fetcher_ == fetcher);
manifest_fetcher_ = nullptr;
int response_code =
net_error == net::OK ? fetcher->request()->GetResponseCode() : -1;
if (response_code == 304 || manifest_data_ == fetcher->manifest_data()) {
// Only need to store response in storage if manifest is not already
// an entry in the cache.
AppCacheEntry* entry = nullptr;
if (inprogress_cache_)
entry = inprogress_cache_->GetEntry(manifest_url_);
if (entry) {
entry->add_types(AppCacheEntry::MANIFEST);
StoreGroupAndCache();
} else {
manifest_response_writer_ = CreateResponseWriter();
scoped_refptr<HttpResponseInfoIOBuffer> io_buffer =
base::MakeRefCounted<HttpResponseInfoIOBuffer>(
std::move(manifest_response_info_));
manifest_response_writer_->WriteInfo(
io_buffer.get(),
base::BindOnce(&AppCacheUpdateJob::OnManifestInfoWriteComplete,
base::Unretained(this)));
}
} else {
VLOG(1) << "Request error: " << net_error
<< " response code: " << response_code;
ScheduleUpdateRetry(kRerunDelayMs);
if (response_code == 200) {
HandleCacheFailure(
blink::mojom::AppCacheErrorDetails(
"Manifest changed during update",
blink::mojom::AppCacheErrorReason::APPCACHE_CHANGED_ERROR, GURL(),
0, false /*is_cross_origin*/),
MANIFEST_ERROR, GURL());
} else {
const char kFormatString[] = "Manifest re-fetch failed (%d) %s";
std::string message = FormatUrlErrorMessage(
kFormatString, manifest_url_, fetcher->result(), response_code);
ResultType result = fetcher->result();
if (result == UPDATE_OK) {
// URLFetcher considers any 2xx response a success, however in this
// particular case we want to treat any non 200 responses as failures.
result = SERVER_ERROR;
}
HandleCacheFailure(
blink::mojom::AppCacheErrorDetails(
message,
blink::mojom::AppCacheErrorReason::APPCACHE_MANIFEST_ERROR,
GURL(), response_code, false /*is_cross_origin*/),
result, GURL());
}
}
}
void AppCacheUpdateJob::OnManifestInfoWriteComplete(int result) {
if (result > 0) {
scoped_refptr<net::StringIOBuffer> io_buffer =
base::MakeRefCounted<net::StringIOBuffer>(manifest_data_);
manifest_response_writer_->WriteData(
io_buffer.get(), manifest_data_.length(),
base::BindOnce(&AppCacheUpdateJob::OnManifestDataWriteComplete,
base::Unretained(this)));
} else {
HandleCacheFailure(
blink::mojom::AppCacheErrorDetails(
"Failed to write the manifest headers to storage",
blink::mojom::AppCacheErrorReason::APPCACHE_UNKNOWN_ERROR, GURL(),
0, false /*is_cross_origin*/),
DISKCACHE_ERROR, GURL());
}
}
void AppCacheUpdateJob::OnManifestDataWriteComplete(int result) {
if (result > 0) {
AppCacheEntry entry(AppCacheEntry::MANIFEST,
manifest_response_writer_->response_id(),
manifest_response_writer_->amount_written());
if (!inprogress_cache_->AddOrModifyEntry(manifest_url_, entry))
duplicate_response_ids_.push_back(entry.response_id());
StoreGroupAndCache();
} else {
HandleCacheFailure(
blink::mojom::AppCacheErrorDetails(
"Failed to write the manifest data to storage",
blink::mojom::AppCacheErrorReason::APPCACHE_UNKNOWN_ERROR, GURL(),
0, false /*is_cross_origin*/),
DISKCACHE_ERROR, GURL());
}
}
void AppCacheUpdateJob::StoreGroupAndCache() {
DCHECK(stored_state_ == UNSTORED);
stored_state_ = STORING;
scoped_refptr<AppCache> newest_cache;
if (inprogress_cache_.get())
newest_cache.swap(inprogress_cache_);
else
newest_cache = group_->newest_complete_cache();
newest_cache->set_update_time(base::Time::Now());
group_->set_first_evictable_error_time(base::Time());
if (doing_full_update_check_)
group_->set_last_full_update_check_time(base::Time::Now());
storage_->StoreGroupAndNewestCache(group_, newest_cache.get(), this);
}
void AppCacheUpdateJob::OnGroupAndNewestCacheStored(AppCacheGroup* group,
AppCache* newest_cache,
bool success,
bool would_exceed_quota) {
DCHECK(stored_state_ == STORING);
if (success) {
stored_state_ = STORED;
MaybeCompleteUpdate(); // will definitely complete
return;
}
stored_state_ = UNSTORED;
// Restore inprogress_cache_ to get the proper events delivered
// and the proper cleanup to occur.
if (newest_cache != group->newest_complete_cache())
inprogress_cache_ = newest_cache;
ResultType result = DB_ERROR;
blink::mojom::AppCacheErrorReason reason =
blink::mojom::AppCacheErrorReason::APPCACHE_UNKNOWN_ERROR;
std::string message("Failed to commit new cache to storage");
if (would_exceed_quota) {
message.append(", would exceed quota");
result = QUOTA_ERROR;
reason = blink::mojom::AppCacheErrorReason::APPCACHE_QUOTA_ERROR;
}
HandleCacheFailure(blink::mojom::AppCacheErrorDetails(
message, reason, GURL(), 0, false /*is_cross_origin*/),
result, GURL());
}
void AppCacheUpdateJob::NotifySingleHost(
AppCacheHost* host,
blink::mojom::AppCacheEventID event_id) {
std::vector<int> ids(1, host->host_id());
host->frontend()->EventRaised(ids, event_id);
}
void AppCacheUpdateJob::NotifyAllAssociatedHosts(
blink::mojom::AppCacheEventID event_id) {
HostNotifier host_notifier;
AddAllAssociatedHostsToNotifier(&host_notifier);
host_notifier.SendNotifications(event_id);
}
void AppCacheUpdateJob::NotifyAllProgress(const GURL& url) {
HostNotifier host_notifier;
AddAllAssociatedHostsToNotifier(&host_notifier);
host_notifier.SendProgressNotifications(
url, url_file_list_.size(), url_fetches_completed_);
}
void AppCacheUpdateJob::NotifyAllFinalProgress() {
DCHECK(url_file_list_.size() == url_fetches_completed_);
NotifyAllProgress(GURL());
}
void AppCacheUpdateJob::NotifyAllError(
const blink::mojom::AppCacheErrorDetails& details) {
HostNotifier host_notifier;
AddAllAssociatedHostsToNotifier(&host_notifier);
host_notifier.SendErrorNotifications(details);
}
void AppCacheUpdateJob::LogConsoleMessageToAll(const std::string& message) {
HostNotifier host_notifier;
AddAllAssociatedHostsToNotifier(&host_notifier);
host_notifier.SendLogMessage(message);
}
void AppCacheUpdateJob::AddAllAssociatedHostsToNotifier(
HostNotifier* host_notifier) {
// Collect hosts so we only send one notification per frontend.
// A host can only be associated with a single cache so no need to worry
// about duplicate hosts being added to the notifier.
if (inprogress_cache_.get()) {
DCHECK(internal_state_ == DOWNLOADING || internal_state_ == CACHE_FAILURE);
host_notifier->AddHosts(inprogress_cache_->associated_hosts());
}
for (AppCache* cache : group_->old_caches())
host_notifier->AddHosts(cache->associated_hosts());
AppCache* newest_cache = group_->newest_complete_cache();
if (newest_cache)
host_notifier->AddHosts(newest_cache->associated_hosts());
}
void AppCacheUpdateJob::OnDestructionImminent(AppCacheHost* host) {
// The host is about to be deleted; remove from our collection.
auto found = pending_master_entries_.find(host->pending_master_entry_url());
CHECK(found != pending_master_entries_.end());
PendingHosts& hosts = found->second;
auto it = std::find(hosts.begin(), hosts.end(), host);
CHECK(it != hosts.end());
hosts.erase(it);
}
void AppCacheUpdateJob::OnServiceReinitialized(
AppCacheStorageReference* old_storage_ref) {
// We continue to use the disabled instance, but arrange for its
// deletion when its no longer needed.
if (old_storage_ref->storage() == storage_)
disabled_storage_reference_ = old_storage_ref;
}
void AppCacheUpdateJob::CheckIfManifestChanged() {
DCHECK(update_type_ == UPGRADE_ATTEMPT);
AppCacheEntry* entry = nullptr;
if (group_->newest_complete_cache())
entry = group_->newest_complete_cache()->GetEntry(manifest_url_);
if (!entry) {
// TODO(michaeln): This is just a bandaid to avoid a crash.
// http://code.google.com/p/chromium/issues/detail?id=95101
if (service_->storage() == storage_) {
// Use a local variable because service_ is reset in HandleCacheFailure.
AppCacheServiceImpl* service = service_;
HandleCacheFailure(
blink::mojom::AppCacheErrorDetails(
"Manifest entry not found in existing cache",
blink::mojom::AppCacheErrorReason::APPCACHE_UNKNOWN_ERROR, GURL(),
0, false /*is_cross_origin*/),
DB_ERROR, GURL());
AppCacheHistograms::AddMissingManifestEntrySample();
service->DeleteAppCacheGroup(manifest_url_,
net::CompletionOnceCallback());
}
return;
}
// Load manifest data from storage to compare against fetched manifest.
manifest_response_reader_ =
storage_->CreateResponseReader(manifest_url_, entry->response_id());
read_manifest_buffer_ =
base::MakeRefCounted<net::IOBuffer>(kAppCacheFetchBufferSize);
manifest_response_reader_->ReadData(
read_manifest_buffer_.get(), kAppCacheFetchBufferSize,
base::BindOnce(&AppCacheUpdateJob::OnManifestDataReadComplete,
base::Unretained(this))); // async read
}
void AppCacheUpdateJob::OnManifestDataReadComplete(int result) {
if (result > 0) {
loaded_manifest_data_.append(read_manifest_buffer_->data(), result);
manifest_response_reader_->ReadData(
read_manifest_buffer_.get(), kAppCacheFetchBufferSize,
base::BindOnce(&AppCacheUpdateJob::OnManifestDataReadComplete,
base::Unretained(this))); // read more
} else {
read_manifest_buffer_ = nullptr;
manifest_response_reader_.reset();
ContinueHandleManifestFetchCompleted(
result < 0 || manifest_data_ != loaded_manifest_data_);
}
}
void AppCacheUpdateJob::BuildUrlFileList(const AppCacheManifest& manifest) {
for (const std::string& explicit_url : manifest.explicit_urls)
AddUrlToFileList(GURL(explicit_url), AppCacheEntry::EXPLICIT);
for (const auto& intercept : manifest.intercept_namespaces)
AddUrlToFileList(intercept.target_url, AppCacheEntry::INTERCEPT);
for (const auto& fallback : manifest.fallback_namespaces)
AddUrlToFileList(fallback.target_url, AppCacheEntry::FALLBACK);
// Add all master entries from newest complete cache.
if (update_type_ == UPGRADE_ATTEMPT) {
for (const auto& pair : group_->newest_complete_cache()->entries()) {
const AppCacheEntry& entry = pair.second;
if (entry.IsMaster())
AddUrlToFileList(pair.first, AppCacheEntry::MASTER);
}
}
}
void AppCacheUpdateJob::AddUrlToFileList(const GURL& url, int type) {
std::pair<AppCache::EntryMap::iterator, bool> ret = url_file_list_.insert(
AppCache::EntryMap::value_type(url, AppCacheEntry(type)));
if (ret.second)
urls_to_fetch_.push_back(UrlToFetch(url, false, nullptr));
else
ret.first->second.add_types(type); // URL already exists. Merge types.
}
void AppCacheUpdateJob::FetchUrls() {
DCHECK(internal_state_ == DOWNLOADING);
// Fetch each URL in the list according to section 6.9.4 step 17.1-17.3.
// Fetch up to the concurrent limit. Other fetches will be triggered as each
// each fetch completes.
while (pending_url_fetches_.size() < kMaxConcurrentUrlFetches &&
!urls_to_fetch_.empty()) {
UrlToFetch url_to_fetch = urls_to_fetch_.front();
urls_to_fetch_.pop_front();
auto it = url_file_list_.find(url_to_fetch.url);
DCHECK(it != url_file_list_.end());
AppCacheEntry& entry = it->second;
if (ShouldSkipUrlFetch(entry)) {
NotifyAllProgress(url_to_fetch.url);
++url_fetches_completed_;
} else if (AlreadyFetchedEntry(url_to_fetch.url, entry.types())) {
NotifyAllProgress(url_to_fetch.url);
++url_fetches_completed_; // saved a URL request
} else if (!url_to_fetch.storage_checked &&
MaybeLoadFromNewestCache(url_to_fetch.url, entry)) {
// Continues asynchronously after data is loaded from newest cache.
} else {
URLFetcher* fetcher =
new URLFetcher(url_to_fetch.url, URLFetcher::URL_FETCH, this,
kAppCacheFetchBufferSize);
if (url_to_fetch.existing_response_info.get() &&
group_->newest_complete_cache()) {
AppCacheEntry* existing_entry =
group_->newest_complete_cache()->GetEntry(url_to_fetch.url);
DCHECK(existing_entry);
DCHECK(existing_entry->response_id() ==
url_to_fetch.existing_response_info->response_id());
fetcher->set_existing_response_headers(
url_to_fetch.existing_response_info->http_response_info()
.headers.get());
fetcher->set_existing_entry(*existing_entry);
}
fetcher->Start();
pending_url_fetches_.insert(
PendingUrlFetches::value_type(url_to_fetch.url, fetcher));
}
}
}
void AppCacheUpdateJob::CancelAllUrlFetches() {
// Cancel any pending URL requests.
for (auto& pair : pending_url_fetches_)
delete pair.second;
url_fetches_completed_ +=
pending_url_fetches_.size() + urls_to_fetch_.size();
pending_url_fetches_.clear();
urls_to_fetch_.clear();
}
bool AppCacheUpdateJob::ShouldSkipUrlFetch(const AppCacheEntry& entry) {
// 6.6.4 Step 17
// If the resource URL being processed was flagged as neither an
// "explicit entry" nor or a "fallback entry", then the user agent
// may skip this URL.
if (entry.IsExplicit() || entry.IsFallback() || entry.IsIntercept())
return false;
// TODO(jennb): decide if entry should be skipped to expire it from cache
return false;
}
bool AppCacheUpdateJob::AlreadyFetchedEntry(const GURL& url,
int entry_type) {
DCHECK(internal_state_ == DOWNLOADING || internal_state_ == NO_UPDATE);
AppCacheEntry* existing =
inprogress_cache_.get() ? inprogress_cache_->GetEntry(url)
: group_->newest_complete_cache()->GetEntry(url);
if (existing) {
existing->add_types(entry_type);
return true;
}
return false;
}
void AppCacheUpdateJob::AddMasterEntryToFetchList(AppCacheHost* host,
const GURL& url,
bool is_new) {
DCHECK(!IsTerminating());
if (internal_state_ == DOWNLOADING || internal_state_ == NO_UPDATE) {
AppCache* cache;
if (inprogress_cache_.get()) {
// always associate
host->AssociateIncompleteCache(inprogress_cache_.get(), manifest_url_);
cache = inprogress_cache_.get();
} else {
cache = group_->newest_complete_cache();
}
// Update existing entry if it has already been fetched.
AppCacheEntry* entry = cache->GetEntry(url);
if (entry) {
entry->add_types(AppCacheEntry::MASTER);
if (internal_state_ == NO_UPDATE && !inprogress_cache_.get()) {
// only associate if have entry
host->AssociateCompleteCache(cache);
}
if (is_new)
++master_entries_completed_; // pretend fetching completed
return;
}
}
// Add to fetch list if not already fetching.
if (master_entry_fetches_.find(url) == master_entry_fetches_.end()) {
master_entries_to_fetch_.insert(url);
if (internal_state_ == DOWNLOADING || internal_state_ == NO_UPDATE)
FetchMasterEntries();
}
}
void AppCacheUpdateJob::FetchMasterEntries() {
DCHECK(internal_state_ == NO_UPDATE || internal_state_ == DOWNLOADING);
// Fetch each master entry in the list, up to the concurrent limit.
// Additional fetches will be triggered as each fetch completes.
while (master_entry_fetches_.size() < kMaxConcurrentUrlFetches &&
!master_entries_to_fetch_.empty()) {
const GURL& url = *master_entries_to_fetch_.begin();
if (AlreadyFetchedEntry(url, AppCacheEntry::MASTER)) {
++master_entries_completed_; // saved a URL request
// In no update case, associate hosts to newest cache in group
// now that master entry has been "successfully downloaded".
if (internal_state_ == NO_UPDATE) {
// TODO(michaeln): defer until the updated cache has been stored.
DCHECK(!inprogress_cache_.get());
AppCache* cache = group_->newest_complete_cache();
auto found = pending_master_entries_.find(url);
DCHECK(found != pending_master_entries_.end());
PendingHosts& hosts = found->second;
for (AppCacheHost* host : hosts)
host->AssociateCompleteCache(cache);
}
} else {
URLFetcher* fetcher = new URLFetcher(url, URLFetcher::MASTER_ENTRY_FETCH,
this, kAppCacheFetchBufferSize);
fetcher->Start();
master_entry_fetches_.insert(PendingUrlFetches::value_type(url, fetcher));
}
master_entries_to_fetch_.erase(master_entries_to_fetch_.begin());
}
}
void AppCacheUpdateJob::CancelAllMasterEntryFetches(
const blink::mojom::AppCacheErrorDetails& error_details) {
// For now, cancel all in-progress fetches for master entries and pretend
// all master entries fetches have completed.
// TODO(jennb): Delete this when update no longer fetches master entries
// directly.
// Cancel all in-progress fetches.
for (auto& pair : master_entry_fetches_) {
delete pair.second;
master_entries_to_fetch_.insert(pair.first); // back in unfetched list
}
master_entry_fetches_.clear();
master_entries_completed_ += master_entries_to_fetch_.size();
// Cache failure steps, step 2.
// Pretend all master entries that have not yet been fetched have completed
// downloading. Unassociate hosts from any appcache and send ERROR event.
HostNotifier host_notifier;
while (!master_entries_to_fetch_.empty()) {
const GURL& url = *master_entries_to_fetch_.begin();
auto found = pending_master_entries_.find(url);
DCHECK(found != pending_master_entries_.end());
PendingHosts& hosts = found->second;
for (AppCacheHost* host : hosts) {
host->AssociateNoCache(GURL());
host_notifier.AddHost(host);
host->RemoveObserver(this);
}
hosts.clear();
master_entries_to_fetch_.erase(master_entries_to_fetch_.begin());
}
host_notifier.SendErrorNotifications(error_details);
}
bool AppCacheUpdateJob::MaybeLoadFromNewestCache(const GURL& url,
AppCacheEntry& entry) {
if (update_type_ != UPGRADE_ATTEMPT)
return false;
AppCache* newest = group_->newest_complete_cache();
AppCacheEntry* copy_me = newest->GetEntry(url);
if (!copy_me || !copy_me->has_response_id())
return false;
// Load HTTP headers for entry from newest cache.
loading_responses_.insert(
LoadingResponses::value_type(copy_me->response_id(), url));
storage_->LoadResponseInfo(manifest_url_, copy_me->response_id(), this);
// Async: wait for OnResponseInfoLoaded to complete.
return true;
}
void AppCacheUpdateJob::OnResponseInfoLoaded(
AppCacheResponseInfo* response_info,
int64_t response_id) {
const net::HttpResponseInfo* http_info =
response_info ? &response_info->http_response_info() : nullptr;
// Needed response info for a manifest fetch request.
if (internal_state_ == FETCH_MANIFEST) {
if (http_info)
manifest_fetcher_->set_existing_response_headers(
http_info->headers.get());
manifest_fetcher_->Start();
return;
}
auto found = loading_responses_.find(response_id);
DCHECK(found != loading_responses_.end());
const GURL& url = found->second;
if (!http_info) {
LoadFromNewestCacheFailed(url, nullptr); // no response found
} else if (!CanUseExistingResource(http_info)) {
LoadFromNewestCacheFailed(url, response_info);
} else {
DCHECK(group_->newest_complete_cache());
AppCacheEntry* copy_me = group_->newest_complete_cache()->GetEntry(url);
DCHECK(copy_me);
DCHECK_EQ(copy_me->response_id(), response_id);
auto it = url_file_list_.find(url);
DCHECK(it != url_file_list_.end());
AppCacheEntry& entry = it->second;
entry.set_response_id(response_id);
entry.set_response_size(copy_me->response_size());
inprogress_cache_->AddOrModifyEntry(url, entry);
NotifyAllProgress(url);
++url_fetches_completed_;
}
loading_responses_.erase(found);
MaybeCompleteUpdate();
}
void AppCacheUpdateJob::LoadFromNewestCacheFailed(
const GURL& url, AppCacheResponseInfo* response_info) {
if (internal_state_ == CACHE_FAILURE)
return;
// Re-insert url at front of fetch list. Indicate storage has been checked.
urls_to_fetch_.push_front(UrlToFetch(url, true, response_info));
FetchUrls();
}
void AppCacheUpdateJob::MaybeCompleteUpdate() {
DCHECK(internal_state_ != CACHE_FAILURE);
// Must wait for any pending master entries or url fetches to complete.
if (master_entries_completed_ != pending_master_entries_.size() ||
url_fetches_completed_ != url_file_list_.size()) {
DCHECK(internal_state_ != COMPLETED);
return;
}
switch (internal_state_) {
case NO_UPDATE:
if (master_entries_completed_ > 0) {
switch (stored_state_) {
case UNSTORED:
StoreGroupAndCache();
return;
case STORING:
return;
case STORED:
break;
}
} else {
bool times_changed = false;
if (!group_->first_evictable_error_time().is_null()) {
group_->set_first_evictable_error_time(base::Time());
times_changed = true;
}
if (doing_full_update_check_) {
group_->set_last_full_update_check_time(base::Time::Now());
times_changed = true;
}
if (times_changed)
storage_->StoreEvictionTimes(group_);
}
group_->SetUpdateAppCacheStatus(AppCacheGroup::IDLE);
// 6.9.4 steps 7.3-7.7.
NotifyAllAssociatedHosts(
blink::mojom::AppCacheEventID::APPCACHE_NO_UPDATE_EVENT);
DiscardDuplicateResponses();
internal_state_ = COMPLETED;
break;
case DOWNLOADING:
internal_state_ = REFETCH_MANIFEST;
FetchManifest(false);
break;
case REFETCH_MANIFEST:
DCHECK(stored_state_ == STORED);
NotifyAllFinalProgress();
group_->SetUpdateAppCacheStatus(AppCacheGroup::IDLE);
if (update_type_ == CACHE_ATTEMPT)
NotifyAllAssociatedHosts(
blink::mojom::AppCacheEventID::APPCACHE_CACHED_EVENT);
else
NotifyAllAssociatedHosts(
blink::mojom::AppCacheEventID::APPCACHE_UPDATE_READY_EVENT);
DiscardDuplicateResponses();
internal_state_ = COMPLETED;
LogHistogramStats(UPDATE_OK, GURL());
break;
case CACHE_FAILURE:
NOTREACHED(); // See HandleCacheFailure
break;
default:
break;
}
// Let the stack unwind before deletion to make it less risky as this
// method is called from multiple places in this file.
if (internal_state_ == COMPLETED)
DeleteSoon();
}
void AppCacheUpdateJob::ScheduleUpdateRetry(int delay_ms) {
// TODO(jennb): post a delayed task with the "same parameters" as this job
// to retry the update at a later time. Need group, URLs of pending master
// entries and their hosts.
}
void AppCacheUpdateJob::Cancel() {
internal_state_ = CANCELLED;
LogHistogramStats(CANCELLED_ERROR, GURL());
if (manifest_fetcher_) {
delete manifest_fetcher_;
manifest_fetcher_ = nullptr;
}
for (auto& pair : pending_url_fetches_)
delete pair.second;
pending_url_fetches_.clear();
for (auto& pair : master_entry_fetches_)
delete pair.second;
master_entry_fetches_.clear();
ClearPendingMasterEntries();
DiscardInprogressCache();
// Delete response writer to avoid any callbacks.
if (manifest_response_writer_)
manifest_response_writer_.reset();
storage_->CancelDelegateCallbacks(this);
}
void AppCacheUpdateJob::ClearPendingMasterEntries() {
for (auto& pair : pending_master_entries_) {
PendingHosts& hosts = pair.second;
for (AppCacheHost* host : hosts)
host->RemoveObserver(this);
}
pending_master_entries_.clear();
}
void AppCacheUpdateJob::DiscardInprogressCache() {
if (stored_state_ == STORING) {
// We can make no assumptions about whether the StoreGroupAndCacheTask
// actually completed or not. This condition should only be reachable
// during shutdown. Free things up and return to do no harm.
inprogress_cache_ = nullptr;
added_master_entries_.clear();
return;
}
storage_->DoomResponses(manifest_url_, stored_response_ids_);
if (!inprogress_cache_.get()) {
// We have to undo the changes we made, if any, to the existing cache.
if (group_ && group_->newest_complete_cache()) {
for (auto& url : added_master_entries_)
group_->newest_complete_cache()->RemoveEntry(url);
}
added_master_entries_.clear();
return;
}
AppCache::AppCacheHosts& hosts = inprogress_cache_->associated_hosts();
while (!hosts.empty())
(*hosts.begin())->AssociateNoCache(GURL());
inprogress_cache_ = nullptr;
added_master_entries_.clear();
}
void AppCacheUpdateJob::DiscardDuplicateResponses() {
storage_->DoomResponses(manifest_url_, duplicate_response_ids_);
}
void AppCacheUpdateJob::LogHistogramStats(
ResultType result, const GURL& failed_resource_url) {
AppCacheHistograms::CountUpdateJobResult(result,
url::Origin::Create(manifest_url_));
if (result == UPDATE_OK)
return;
int percent_complete = 0;
if (url_file_list_.size() > 0) {
size_t actual_fetches_completed = url_fetches_completed_;
if (!failed_resource_url.is_empty() && actual_fetches_completed)
--actual_fetches_completed;
percent_complete = (static_cast<double>(actual_fetches_completed) /
static_cast<double>(url_file_list_.size())) * 100.0;
percent_complete = std::min(percent_complete, 99);
}
bool was_making_progress =
base::Time::Now() - last_progress_time_ <
base::TimeDelta::FromMinutes(5);
bool off_origin_resource_failure =
!failed_resource_url.is_empty() &&
(failed_resource_url.GetOrigin() != manifest_url_.GetOrigin());
AppCacheHistograms::LogUpdateFailureStats(
url::Origin::Create(manifest_url_), percent_complete, was_making_progress,
off_origin_resource_failure);
}
void AppCacheUpdateJob::DeleteSoon() {
ClearPendingMasterEntries();
manifest_response_writer_.reset();
storage_->CancelDelegateCallbacks(this);
service_->RemoveObserver(this);
service_ = nullptr;
// Break the connection with the group so the group cannot call delete
// on this object after we've posted a task to delete ourselves.
if (group_) {
group_->SetUpdateAppCacheStatus(AppCacheGroup::IDLE);
group_ = nullptr;
}
base::ThreadTaskRunnerHandle::Get()->DeleteSoon(FROM_HERE, this);
}
} // namespace content