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fune/toolkit/components/url-classifier/nsUrlClassifierStreamUpdater.cpp
Dimi f4004eb891 Bug 1787641 - Check existence of a channel before canceling it r=timhuang 
mChannel might be null if download failure occurs right after receiving `quit-application` event.

Differential Revision: https://phabricator.services.mozilla.com/D156281
2022-09-02 08:20:12 +00:00

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//* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "mozilla/Components.h"
#include "nsCRT.h"
#include "nsIHttpChannel.h"
#include "nsIObserverService.h"
#include "nsIStringStream.h"
#include "nsIUploadChannel.h"
#include "nsIURI.h"
#include "nsIUrlClassifierDBService.h"
#include "nsIUrlClassifierRemoteSettingsService.h"
#include "nsUrlClassifierUtils.h"
#include "nsNetUtil.h"
#include "nsStreamUtils.h"
#include "nsStringStream.h"
#include "nsUrlClassifierStreamUpdater.h"
#include "mozilla/ErrorNames.h"
#include "mozilla/Logging.h"
#include "nsIInterfaceRequestor.h"
#include "mozilla/Telemetry.h"
#include "nsContentUtils.h"
#include "nsIURLFormatter.h"
#include "Classifier.h"
#include "UrlClassifierTelemetryUtils.h"
#include "mozilla/StaticPrefs_urlclassifier.h"
using namespace mozilla::safebrowsing;
using namespace mozilla;
#define MIN_TIMEOUT_MS (60 * 1000)
static const char* gQuitApplicationMessage = "quit-application";
// Limit the list file size to 32mb
const uint32_t MAX_FILE_SIZE = (32 * 1024 * 1024);
// Retry delay when we failed to DownloadUpdate() if due to
// DBService busy.
const uint32_t FETCH_NEXT_REQUEST_RETRY_DELAY_MS = 1000;
#undef LOG
// MOZ_LOG=UrlClassifierStreamUpdater:5
static mozilla::LazyLogModule gUrlClassifierStreamUpdaterLog(
"UrlClassifierStreamUpdater");
#define LOG(args) TrimAndLog args
#define LOG_ENABLED() \
MOZ_LOG_TEST(gUrlClassifierStreamUpdaterLog, mozilla::LogLevel::Debug)
// Calls nsIURLFormatter::TrimSensitiveURLs to remove sensitive
// info from the logging message.
static MOZ_FORMAT_PRINTF(1, 2) void TrimAndLog(const char* aFmt, ...) {
nsString raw;
va_list ap;
va_start(ap, aFmt);
raw.AppendVprintf(aFmt, ap);
va_end(ap);
nsCOMPtr<nsIURLFormatter> urlFormatter =
do_GetService("@mozilla.org/toolkit/URLFormatterService;1");
nsString trimmed;
nsresult rv = urlFormatter->TrimSensitiveURLs(raw, trimmed);
if (NS_FAILED(rv)) {
trimmed.Truncate();
}
// Use %s so we aren't exposing random strings to printf interpolation.
MOZ_LOG(gUrlClassifierStreamUpdaterLog, mozilla::LogLevel::Debug,
("%s", NS_ConvertUTF16toUTF8(trimmed).get()));
}
// This class does absolutely nothing, except pass requests onto the DBService.
///////////////////////////////////////////////////////////////////////////////
// nsIUrlClassiferStreamUpdater implementation
// Handles creating/running the stream listener
nsUrlClassifierStreamUpdater::nsUrlClassifierStreamUpdater()
: mIsUpdating(false),
mInitialized(false),
mDownloadError(false),
mBeganStream(false),
mChannel(nullptr),
mTelemetryClockStart(0) {
LOG(("nsUrlClassifierStreamUpdater init [this=%p]", this));
}
NS_IMPL_ISUPPORTS(nsUrlClassifierStreamUpdater, nsIUrlClassifierStreamUpdater,
nsIUrlClassifierUpdateObserver, nsIRequestObserver,
nsIStreamListener, nsIObserver, nsIInterfaceRequestor,
nsITimerCallback, nsINamed)
/**
* Clear out the update.
*/
void nsUrlClassifierStreamUpdater::DownloadDone() {
LOG(("nsUrlClassifierStreamUpdater::DownloadDone [this=%p]", this));
mIsUpdating = false;
mPendingUpdates.Clear();
mDownloadError = false;
mCurrentRequest = nullptr;
}
///////////////////////////////////////////////////////////////////////////////
// nsIUrlClassifierStreamUpdater implementation
nsresult nsUrlClassifierStreamUpdater::FetchUpdate(
nsIURI* aUpdateUrl, const nsACString& aRequestPayload, bool aIsPostRequest,
const nsACString& aStreamTable) {
mBeganStream = false;
nsresult rv;
// moz-sbrs is a customed scheme used by Safe Browsing. When the scheme is
// present in the update url, we'll fetch the data from
// UrlClassifierRemoteSettingsService.
if (aUpdateUrl->SchemeIs("moz-sbrs")) {
#ifdef DEBUG
LOG(("Fetching update %s from RemoteSettings", aRequestPayload.Data()));
#endif
nsCOMPtr<nsIUrlClassifierRemoteSettingsService> rsService =
do_GetService("@mozilla.org/url-classifier/list-service;1");
if (!rsService) {
return NS_ERROR_FAILURE;
}
rv = rsService->FetchList(aRequestPayload, this);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
} else {
#ifdef DEBUG
LOG(("Fetching update %s from %s", aRequestPayload.Data(),
aUpdateUrl->GetSpecOrDefault().get()));
#endif
uint32_t loadFlags = nsIChannel::INHIBIT_CACHING |
nsIChannel::LOAD_BYPASS_CACHE |
nsIChannel::LOAD_BYPASS_URL_CLASSIFIER;
// SafeBrowsing update request should never be classified to make sure
// we can recover from a bad SafeBrowsing database.
rv = NS_NewChannel(getter_AddRefs(mChannel), aUpdateUrl,
nsContentUtils::GetSystemPrincipal(),
nsILoadInfo::SEC_ALLOW_CROSS_ORIGIN_SEC_CONTEXT_IS_NULL,
nsIContentPolicy::TYPE_OTHER,
nullptr, // nsICookieJarSettings
nullptr, // aPerformanceStorage
nullptr, // aLoadGroup
this, // aInterfaceRequestor
loadFlags);
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsILoadInfo> loadInfo = mChannel->LoadInfo();
mozilla::OriginAttributes attrs;
attrs.mFirstPartyDomain.AssignLiteral(
NECKO_SAFEBROWSING_FIRST_PARTY_DOMAIN);
loadInfo->SetOriginAttributes(attrs);
// allow deprecated HTTP request from SystemPrincipal
loadInfo->SetAllowDeprecatedSystemRequests(true);
if (!aIsPostRequest) {
// We use POST method to send our request in v2. In v4, the request
// needs to be embedded to the URL and use GET method to send.
// However, from the Chromium source code, a extended HTTP header has
// to be sent along with the request to make the request succeed.
// The following description is from Chromium source code:
//
// "The following header informs the envelope server (which sits in
// front of Google's stubby server) that the received GET request should
// be interpreted as a POST."
//
nsCOMPtr<nsIHttpChannel> httpChannel = do_QueryInterface(mChannel, &rv);
NS_ENSURE_SUCCESS(rv, rv);
rv = httpChannel->SetRequestHeader("X-HTTP-Method-Override"_ns, "POST"_ns,
false);
NS_ENSURE_SUCCESS(rv, rv);
} else if (!aRequestPayload.IsEmpty()) {
rv = AddRequestBody(aRequestPayload);
NS_ENSURE_SUCCESS(rv, rv);
}
// Set the appropriate content type for file/data URIs, for unit testing
// purposes.
// This is only used for testing and should be deleted.
if (aUpdateUrl->SchemeIs("file") || aUpdateUrl->SchemeIs("data")) {
mChannel->SetContentType("application/vnd.google.safebrowsing-update"_ns);
} else {
// We assume everything else is an HTTP request.
// Disable keepalive.
nsCOMPtr<nsIHttpChannel> httpChannel = do_QueryInterface(mChannel, &rv);
NS_ENSURE_SUCCESS(rv, rv);
rv = httpChannel->SetRequestHeader("Connection"_ns, "close"_ns, false);
NS_ENSURE_SUCCESS(rv, rv);
}
// Make the request.
rv = mChannel->AsyncOpen(this);
NS_ENSURE_SUCCESS(rv, rv);
}
mTelemetryClockStart = PR_IntervalNow();
mStreamTable = aStreamTable;
if (StaticPrefs::urlclassifier_update_response_timeout_ms() >
StaticPrefs::urlclassifier_update_timeout_ms()) {
NS_WARNING(
"Safe Browsing response timeout is greater than the general "
"timeout. Disabling these update timeouts.");
return NS_OK;
}
MOZ_TRY_VAR(mResponseTimeoutTimer,
NS_NewTimerWithCallback(
this, StaticPrefs::urlclassifier_update_response_timeout_ms(),
nsITimer::TYPE_ONE_SHOT));
MOZ_TRY_VAR(mTimeoutTimer,
NS_NewTimerWithCallback(
this, StaticPrefs::urlclassifier_update_timeout_ms(),
nsITimer::TYPE_ONE_SHOT));
if (StaticPrefs::urlclassifier_update_timeout_ms() < MIN_TIMEOUT_MS) {
LOG(("Download update timeout %d ms (< %d ms) would be too small",
StaticPrefs::urlclassifier_update_timeout_ms(), MIN_TIMEOUT_MS));
}
return NS_OK;
}
nsresult nsUrlClassifierStreamUpdater::FetchUpdate(
const nsACString& aUpdateUrl, const nsACString& aRequestPayload,
bool aIsPostRequest, const nsACString& aStreamTable) {
LOG(("(pre) Fetching update from %s\n",
PromiseFlatCString(aUpdateUrl).get()));
nsCString updateUrl(aUpdateUrl);
if (!aIsPostRequest) {
updateUrl.AppendPrintf("&$req=%s", nsCString(aRequestPayload).get());
}
nsCOMPtr<nsIURI> uri;
nsresult rv = NS_NewURI(getter_AddRefs(uri), updateUrl);
NS_ENSURE_SUCCESS(rv, rv);
nsAutoCString urlSpec;
uri->GetAsciiSpec(urlSpec);
LOG(("(post) Fetching update from %s\n", urlSpec.get()));
return FetchUpdate(uri, aRequestPayload, aIsPostRequest, aStreamTable);
}
NS_IMETHODIMP
nsUrlClassifierStreamUpdater::DownloadUpdates(
const nsACString& aRequestTables, const nsACString& aRequestPayload,
bool aIsPostRequest, const nsACString& aUpdateUrl,
nsIUrlClassifierCallback* aSuccessCallback,
nsIUrlClassifierCallback* aUpdateErrorCallback,
nsIUrlClassifierCallback* aDownloadErrorCallback, bool* _retval) {
NS_ENSURE_ARG(aSuccessCallback);
NS_ENSURE_ARG(aUpdateErrorCallback);
NS_ENSURE_ARG(aDownloadErrorCallback);
if (mIsUpdating) {
LOG(("Already updating, queueing update %s from %s", aRequestPayload.Data(),
aUpdateUrl.Data()));
*_retval = false;
UpdateRequest* request = mPendingRequests.AppendElement(fallible);
if (!request) {
return NS_ERROR_OUT_OF_MEMORY;
}
BuildUpdateRequest(aRequestTables, aRequestPayload, aIsPostRequest,
aUpdateUrl, aSuccessCallback, aUpdateErrorCallback,
aDownloadErrorCallback, request);
return NS_OK;
}
if (aUpdateUrl.IsEmpty()) {
NS_ERROR("updateUrl not set");
return NS_ERROR_NOT_INITIALIZED;
}
nsresult rv;
if (!mInitialized) {
// Add an observer for shutdown so we can cancel any pending list
// downloads. quit-application is the same event that the download
// manager listens for and uses to cancel pending downloads.
nsCOMPtr<nsIObserverService> observerService =
mozilla::services::GetObserverService();
if (!observerService) return NS_ERROR_FAILURE;
observerService->AddObserver(this, gQuitApplicationMessage, false);
mDBService = mozilla::components::UrlClassifierDB::Service(&rv);
NS_ENSURE_SUCCESS(rv, rv);
mInitialized = true;
}
rv = mDBService->BeginUpdate(this, aRequestTables);
if (rv == NS_ERROR_NOT_AVAILABLE) {
LOG(("Service busy, already updating, queuing update %s from %s",
aRequestPayload.Data(), aUpdateUrl.Data()));
*_retval = false;
UpdateRequest* request = mPendingRequests.AppendElement(fallible);
if (!request) {
return NS_ERROR_OUT_OF_MEMORY;
}
BuildUpdateRequest(aRequestTables, aRequestPayload, aIsPostRequest,
aUpdateUrl, aSuccessCallback, aUpdateErrorCallback,
aDownloadErrorCallback, request);
// We cannot guarantee that we will be notified when DBService is done
// processing the current update, so we fire a retry timer on our own.
MOZ_TRY_VAR(mFetchNextRequestTimer,
NS_NewTimerWithCallback(this, FETCH_NEXT_REQUEST_RETRY_DELAY_MS,
nsITimer::TYPE_ONE_SHOT));
return NS_OK;
}
if (NS_FAILED(rv)) {
return rv;
}
nsUrlClassifierUtils* urlUtil = nsUrlClassifierUtils::GetInstance();
if (NS_WARN_IF(!urlUtil)) {
return NS_ERROR_FAILURE;
}
nsTArray<nsCString> tables;
mozilla::safebrowsing::Classifier::SplitTables(aRequestTables, tables);
urlUtil->GetTelemetryProvider(tables.SafeElementAt(0, ""_ns),
mTelemetryProvider);
mCurrentRequest = MakeUnique<UpdateRequest>();
BuildUpdateRequest(aRequestTables, aRequestPayload, aIsPostRequest,
aUpdateUrl, aSuccessCallback, aUpdateErrorCallback,
aDownloadErrorCallback, mCurrentRequest.get());
mIsUpdating = true;
*_retval = true;
LOG(("FetchUpdate: %s", mCurrentRequest->mUrl.Data()));
return FetchUpdate(aUpdateUrl, aRequestPayload, aIsPostRequest, ""_ns);
}
///////////////////////////////////////////////////////////////////////////////
// nsIUrlClassifierUpdateObserver implementation
NS_IMETHODIMP
nsUrlClassifierStreamUpdater::UpdateUrlRequested(const nsACString& aUrl,
const nsACString& aTable) {
LOG(("Queuing requested update from %s\n", PromiseFlatCString(aUrl).get()));
PendingUpdate* update = mPendingUpdates.AppendElement(fallible);
if (!update) {
return NS_ERROR_OUT_OF_MEMORY;
}
// Allow data: and file: urls for unit testing purposes, otherwise assume http
if (StringBeginsWith(aUrl, "data:"_ns) ||
StringBeginsWith(aUrl, "file:"_ns)) {
update->mUrl = aUrl;
} else {
// For unittesting update urls to localhost should use http, not https
// (otherwise the connection will fail silently, since there will be no
// cert available).
if (!StringBeginsWith(aUrl, "localhost"_ns)) {
update->mUrl = "https://"_ns + aUrl;
} else {
update->mUrl = "http://"_ns + aUrl;
}
}
update->mTable = aTable;
return NS_OK;
}
nsresult nsUrlClassifierStreamUpdater::FetchNext() {
if (mPendingUpdates.Length() == 0) {
return NS_OK;
}
PendingUpdate& update = mPendingUpdates[0];
LOG(("Fetching update url: %s\n", update.mUrl.get()));
nsresult rv =
FetchUpdate(update.mUrl, ""_ns,
true, // This method is for v2 and v2 is always a POST.
update.mTable);
if (NS_FAILED(rv)) {
nsAutoCString errorName;
mozilla::GetErrorName(rv, errorName);
LOG(("Error (%s) fetching update url: %s\n", errorName.get(),
update.mUrl.get()));
// We can commit the urls that we've applied so far. This is
// probably a transient server problem, so trigger backoff.
mDownloadError = true;
mDBService->FinishUpdate();
return rv;
}
mPendingUpdates.RemoveElementAt(0);
return NS_OK;
}
nsresult nsUrlClassifierStreamUpdater::FetchNextRequest() {
if (mPendingRequests.Length() == 0) {
LOG(("No more requests, returning"));
return NS_OK;
}
UpdateRequest request = mPendingRequests[0];
mPendingRequests.RemoveElementAt(0);
LOG(("Stream updater: fetching next request: %s, %s", request.mTables.get(),
request.mUrl.get()));
bool dummy;
DownloadUpdates(request.mTables, request.mRequestPayload,
request.mIsPostRequest, request.mUrl,
request.mSuccessCallback, request.mUpdateErrorCallback,
request.mDownloadErrorCallback, &dummy);
return NS_OK;
}
void nsUrlClassifierStreamUpdater::BuildUpdateRequest(
const nsACString& aRequestTables, const nsACString& aRequestPayload,
bool aIsPostRequest, const nsACString& aUpdateUrl,
nsIUrlClassifierCallback* aSuccessCallback,
nsIUrlClassifierCallback* aUpdateErrorCallback,
nsIUrlClassifierCallback* aDownloadErrorCallback, UpdateRequest* aRequest) {
MOZ_ASSERT(aRequest);
aRequest->mTables = aRequestTables;
aRequest->mRequestPayload = aRequestPayload;
aRequest->mIsPostRequest = aIsPostRequest;
aRequest->mUrl = aUpdateUrl;
aRequest->mSuccessCallback = aSuccessCallback;
aRequest->mUpdateErrorCallback = aUpdateErrorCallback;
aRequest->mDownloadErrorCallback = aDownloadErrorCallback;
}
NS_IMETHODIMP
nsUrlClassifierStreamUpdater::StreamFinished(nsresult status,
uint32_t requestedDelay) {
// We are a service and may not be reset with Init between calls, so reset
// mBeganStream manually.
mBeganStream = false;
if (LOG_ENABLED()) {
nsAutoCString errorName;
mozilla::GetErrorName(status, errorName);
LOG(("nsUrlClassifierStreamUpdater::StreamFinished [%s, %d]",
errorName.get(), requestedDelay));
}
if (NS_FAILED(status) || mPendingUpdates.Length() == 0) {
// We're done.
LOG(("nsUrlClassifierStreamUpdater::Done [this=%p]", this));
mDBService->FinishUpdate();
return NS_OK;
}
// This timer is for fetching indirect updates ("forwards") from any "u:"
// lines that we encountered while processing the server response. It is NOT
// for scheduling the next time we pull the list from the server. That's a
// different timer in listmanager.js (see bug 1110891).
nsresult rv;
rv = NS_NewTimerWithCallback(getter_AddRefs(mFetchIndirectUpdatesTimer), this,
requestedDelay, nsITimer::TYPE_ONE_SHOT);
if (NS_FAILED(rv)) {
NS_WARNING(
"Unable to initialize timer, fetching next safebrowsing item "
"immediately");
return FetchNext();
}
return NS_OK;
}
NS_IMETHODIMP
nsUrlClassifierStreamUpdater::UpdateSuccess(uint32_t requestedTimeout) {
LOG(("nsUrlClassifierStreamUpdater::UpdateSuccess [this=%p]", this));
if (mPendingUpdates.Length() != 0) {
NS_WARNING("Didn't fetch all safebrowsing update redirects");
}
// DownloadDone() clears mSuccessCallback, so we save it off here.
nsCOMPtr<nsIUrlClassifierCallback> successCallback =
mDownloadError ? nullptr : mCurrentRequest->mSuccessCallback.get();
nsCOMPtr<nsIUrlClassifierCallback> downloadErrorCallback =
mDownloadError ? mCurrentRequest->mDownloadErrorCallback.get() : nullptr;
DownloadDone();
nsAutoCString strTimeout;
strTimeout.AppendInt(requestedTimeout);
if (successCallback) {
LOG(("nsUrlClassifierStreamUpdater::UpdateSuccess callback [this=%p]",
this));
successCallback->HandleEvent(strTimeout);
} else if (downloadErrorCallback) {
downloadErrorCallback->HandleEvent(mDownloadErrorStatusStr);
mDownloadErrorStatusStr.Truncate();
LOG(("Notify download error callback in UpdateSuccess [this=%p]", this));
}
// Now fetch the next request
LOG(("stream updater: calling into fetch next request"));
FetchNextRequest();
return NS_OK;
}
NS_IMETHODIMP
nsUrlClassifierStreamUpdater::UpdateError(nsresult result) {
LOG(("nsUrlClassifierStreamUpdater::UpdateError [this=%p]", this));
// DownloadDone() clears mUpdateErrorCallback, so we save it off here.
nsCOMPtr<nsIUrlClassifierCallback> errorCallback =
mDownloadError ? nullptr : mCurrentRequest->mUpdateErrorCallback.get();
nsCOMPtr<nsIUrlClassifierCallback> downloadErrorCallback =
mDownloadError ? mCurrentRequest->mDownloadErrorCallback.get() : nullptr;
DownloadDone();
if (errorCallback) {
nsAutoCString strResult;
mozilla::GetErrorName(result, strResult);
errorCallback->HandleEvent(strResult);
} else if (downloadErrorCallback) {
LOG(("Notify download error callback in UpdateError [this=%p]", this));
downloadErrorCallback->HandleEvent(mDownloadErrorStatusStr);
mDownloadErrorStatusStr.Truncate();
}
return NS_OK;
}
nsresult nsUrlClassifierStreamUpdater::AddRequestBody(
const nsACString& aRequestBody) {
nsresult rv;
nsCOMPtr<nsIStringInputStream> strStream =
do_CreateInstance(NS_STRINGINPUTSTREAM_CONTRACTID, &rv);
NS_ENSURE_SUCCESS(rv, rv);
rv = strStream->SetData(aRequestBody.BeginReading(), aRequestBody.Length());
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIUploadChannel> uploadChannel = do_QueryInterface(mChannel, &rv);
NS_ENSURE_SUCCESS(rv, rv);
rv = uploadChannel->SetUploadStream(strStream, "text/plain"_ns, -1);
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIHttpChannel> httpChannel = do_QueryInterface(mChannel, &rv);
NS_ENSURE_SUCCESS(rv, rv);
rv = httpChannel->SetRequestMethod("POST"_ns);
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}
///////////////////////////////////////////////////////////////////////////////
// nsIStreamListenerObserver implementation
NS_IMETHODIMP
nsUrlClassifierStreamUpdater::OnStartRequest(nsIRequest* request) {
nsresult rv;
bool downloadError = false;
nsAutoCString strStatus;
nsresult status = NS_OK;
// Only update if we got http success header
nsCOMPtr<nsIHttpChannel> httpChannel = do_QueryInterface(request);
if (httpChannel) {
rv = httpChannel->GetStatus(&status);
NS_ENSURE_SUCCESS(rv, rv);
if (LOG_ENABLED()) {
nsAutoCString errorName, spec;
mozilla::GetErrorName(status, errorName);
nsCOMPtr<nsIURI> uri;
rv = httpChannel->GetURI(getter_AddRefs(uri));
if (NS_SUCCEEDED(rv) && uri) {
uri->GetAsciiSpec(spec);
}
LOG(
("nsUrlClassifierStreamUpdater::OnStartRequest "
"(status=%s, uri=%s, this=%p)",
errorName.get(), spec.get(), this));
}
if (mTelemetryClockStart > 0) {
uint32_t msecs =
PR_IntervalToMilliseconds(PR_IntervalNow() - mTelemetryClockStart);
mozilla::Telemetry::Accumulate(
mozilla::Telemetry::URLCLASSIFIER_UPDATE_SERVER_RESPONSE_TIME,
mTelemetryProvider, msecs);
}
if (mResponseTimeoutTimer) {
mResponseTimeoutTimer->Cancel();
mResponseTimeoutTimer = nullptr;
}
uint8_t netErrCode = NS_FAILED(status) ? NetworkErrorToBucket(status) : 0;
mozilla::Telemetry::Accumulate(
mozilla::Telemetry::URLCLASSIFIER_UPDATE_REMOTE_NETWORK_ERROR,
mTelemetryProvider, netErrCode);
if (NS_FAILED(status)) {
// Assume we're overloading the server and trigger backoff.
downloadError = true;
} else {
bool succeeded = false;
rv = httpChannel->GetRequestSucceeded(&succeeded);
NS_ENSURE_SUCCESS(rv, rv);
uint32_t requestStatus;
rv = httpChannel->GetResponseStatus(&requestStatus);
NS_ENSURE_SUCCESS(rv, rv);
mozilla::Telemetry::Accumulate(
mozilla::Telemetry::URLCLASSIFIER_UPDATE_REMOTE_STATUS2,
mTelemetryProvider, HTTPStatusToBucket(requestStatus));
if (requestStatus == 400) {
printf_stderr(
"Safe Browsing server returned a 400 during update:"
"request url = %s, payload = %s\n",
mCurrentRequest->mUrl.get(),
mCurrentRequest->mRequestPayload.get());
}
LOG(("nsUrlClassifierStreamUpdater::OnStartRequest %s (%d)",
succeeded ? "succeeded" : "failed", requestStatus));
if (!succeeded) {
// 404 or other error, pass error status back
strStatus.AppendInt(requestStatus);
downloadError = true;
}
}
}
if (downloadError) {
LOG(("nsUrlClassifierStreamUpdater::Download error [this=%p]", this));
mDownloadError = true;
mDownloadErrorStatusStr = strStatus;
status = NS_ERROR_ABORT;
} else if (NS_SUCCEEDED(status)) {
MOZ_ASSERT(mCurrentRequest->mDownloadErrorCallback);
mBeganStream = true;
LOG(("nsUrlClassifierStreamUpdater::Beginning stream [this=%p]", this));
rv = mDBService->BeginStream(mStreamTable);
NS_ENSURE_SUCCESS(rv, rv);
}
mStreamTable.Truncate();
return status;
}
NS_IMETHODIMP
nsUrlClassifierStreamUpdater::OnDataAvailable(nsIRequest* request,
nsIInputStream* aIStream,
uint64_t aSourceOffset,
uint32_t aLength) {
if (!mDBService) return NS_ERROR_NOT_INITIALIZED;
LOG(("OnDataAvailable (%d bytes)", aLength));
if (aSourceOffset > MAX_FILE_SIZE) {
LOG((
"OnDataAvailable::Abort because exceeded the maximum file size(%" PRIu64
")",
aSourceOffset));
return NS_ERROR_FILE_TOO_BIG;
}
nsresult rv;
// Copy the data into a nsCString
nsCString chunk;
rv = NS_ConsumeStream(aIStream, aLength, chunk);
NS_ENSURE_SUCCESS(rv, rv);
// LOG(("Chunk (%d): %s\n\n", chunk.Length(), chunk.get()));
rv = mDBService->UpdateStream(chunk);
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}
NS_IMETHODIMP
nsUrlClassifierStreamUpdater::OnStopRequest(nsIRequest* request,
nsresult aStatus) {
if (!mDBService) return NS_ERROR_NOT_INITIALIZED;
if (LOG_ENABLED()) {
nsAutoCString errorName;
mozilla::GetErrorName(aStatus, errorName);
LOG(("OnStopRequest (status %s, beganStream %s, this=%p)", errorName.get(),
mBeganStream ? "true" : "false", this));
}
nsresult rv;
if (NS_SUCCEEDED(aStatus)) {
// Success, finish this stream and move on to the next.
rv = mDBService->FinishStream();
} else if (mBeganStream) {
LOG(("OnStopRequest::Canceling update [this=%p]", this));
// We began this stream and couldn't finish it. We have to cancel the
// update, it's not in a consistent state.
mDownloadError = true;
rv = mDBService->CancelUpdate();
} else {
LOG(("OnStopRequest::Finishing update [this=%p]", this));
// The fetch failed, but we didn't start the stream (probably a
// server or connection error). We can commit what we've applied
// so far, and request again later.
rv = mDBService->FinishUpdate();
}
if (mResponseTimeoutTimer) {
mResponseTimeoutTimer->Cancel();
mResponseTimeoutTimer = nullptr;
}
// mResponseTimeoutTimer may be cleared in OnStartRequest, so we check
// mTimeoutTimer to see whether the update was has timed out
if (mTimeoutTimer) {
mozilla::Telemetry::Accumulate(
mozilla::Telemetry::URLCLASSIFIER_UPDATE_TIMEOUT, mTelemetryProvider,
static_cast<uint8_t>(eNoTimeout));
mTimeoutTimer->Cancel();
mTimeoutTimer = nullptr;
}
mTelemetryProvider.Truncate();
mTelemetryClockStart = 0;
mChannel = nullptr;
// If the fetch failed, return the network status rather than NS_OK, the
// result of finishing a possibly-empty update
if (NS_SUCCEEDED(aStatus)) {
return rv;
}
return aStatus;
}
///////////////////////////////////////////////////////////////////////////////
// nsIObserver implementation
NS_IMETHODIMP
nsUrlClassifierStreamUpdater::Observe(nsISupports* aSubject, const char* aTopic,
const char16_t* aData) {
if (nsCRT::strcmp(aTopic, gQuitApplicationMessage) == 0) {
if (mIsUpdating && mChannel) {
LOG(("Cancel download"));
nsresult rv;
rv = mChannel->Cancel(NS_ERROR_ABORT);
NS_ENSURE_SUCCESS(rv, rv);
mIsUpdating = false;
mChannel = nullptr;
mTelemetryClockStart = 0;
}
if (mFetchIndirectUpdatesTimer) {
mFetchIndirectUpdatesTimer->Cancel();
mFetchIndirectUpdatesTimer = nullptr;
}
if (mFetchNextRequestTimer) {
mFetchNextRequestTimer->Cancel();
mFetchNextRequestTimer = nullptr;
}
if (mResponseTimeoutTimer) {
mResponseTimeoutTimer->Cancel();
mResponseTimeoutTimer = nullptr;
}
if (mTimeoutTimer) {
mTimeoutTimer->Cancel();
mTimeoutTimer = nullptr;
}
}
return NS_OK;
}
///////////////////////////////////////////////////////////////////////////////
// nsIInterfaceRequestor implementation
NS_IMETHODIMP
nsUrlClassifierStreamUpdater::GetInterface(const nsIID& eventSinkIID,
void** _retval) {
return QueryInterface(eventSinkIID, _retval);
}
///////////////////////////////////////////////////////////////////////////////
// nsITimerCallback implementation
NS_IMETHODIMP
nsUrlClassifierStreamUpdater::Notify(nsITimer* timer) {
LOG(("nsUrlClassifierStreamUpdater::Notify [%p]", this));
if (timer == mFetchNextRequestTimer) {
mFetchNextRequestTimer = nullptr;
FetchNextRequest();
return NS_OK;
}
if (timer == mFetchIndirectUpdatesTimer) {
mFetchIndirectUpdatesTimer = nullptr;
// Start the update process up again.
FetchNext();
return NS_OK;
}
bool updateFailed = false;
if (timer == mResponseTimeoutTimer) {
mResponseTimeoutTimer = nullptr;
if (mTimeoutTimer) {
mTimeoutTimer->Cancel();
mTimeoutTimer = nullptr;
}
mDownloadError = true; // Trigger backoff
updateFailed = true;
MOZ_LOG(gUrlClassifierStreamUpdaterLog, mozilla::LogLevel::Error,
("Safe Browsing timed out while waiting for the update server to "
"respond."));
mozilla::Telemetry::Accumulate(
mozilla::Telemetry::URLCLASSIFIER_UPDATE_TIMEOUT, mTelemetryProvider,
static_cast<uint8_t>(eResponseTimeout));
}
if (timer == mTimeoutTimer) {
mTimeoutTimer = nullptr;
// No backoff since the connection may just be temporarily slow.
updateFailed = true;
MOZ_LOG(gUrlClassifierStreamUpdaterLog, mozilla::LogLevel::Error,
("Safe Browsing timed out while waiting for the update server to "
"finish."));
mozilla::Telemetry::Accumulate(
mozilla::Telemetry::URLCLASSIFIER_UPDATE_TIMEOUT, mTelemetryProvider,
static_cast<uint8_t>(eDownloadTimeout));
}
if (updateFailed) {
// Cancelling the channel will trigger OnStopRequest.
if (mChannel) {
mozilla::Unused << mChannel->Cancel(NS_ERROR_ABORT);
mChannel = nullptr;
}
mTelemetryClockStart = 0;
if (mFetchIndirectUpdatesTimer) {
mFetchIndirectUpdatesTimer->Cancel();
mFetchIndirectUpdatesTimer = nullptr;
}
if (mFetchNextRequestTimer) {
mFetchNextRequestTimer->Cancel();
mFetchNextRequestTimer = nullptr;
}
return NS_OK;
}
MOZ_ASSERT_UNREACHABLE("A timer is fired from nowhere.");
return NS_OK;
}
////////////////////////////////////////////////////////////////////////
//// nsINamed
NS_IMETHODIMP
nsUrlClassifierStreamUpdater::GetName(nsACString& aName) {
aName.AssignLiteral("nsUrlClassifierStreamUpdater");
return NS_OK;
}
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