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fune/toolkit/components/url-classifier/nsUrlClassifierStreamUpdater.cpp
Henry Chang 1188da748e Bug 1338638 - Fix race condition for DBService APIs to avoid long delayed initial download. r=francois 
When starting up, SafeBrowsing.jsm will try to use DBService to add testing entries. Meanwhile,
listmanager will request StreamUpdater to download lists with a random initial delay.

The requests that listmanager issue to StreamUpdater will be queued up
if DBserve is busy and will be retried when StreamUpdater is notified that
the previous update is complete. However, in some edge cases,
the queued requests may not be processed until the next update request from listmanager.
For example, SafeBrowsing.jsm calls DBService.beginUpdate at t0 and the update is
complete at t1. If listmanager sends all requests via StreamUpdate between t0 and t1,
they will all be queued up and no further request can trigger the queued ones.

So in this patch I add a timer to re-trigger FetchNextRequest() in case StreamUpdater is not
notified the previous update is complete.

MozReview-Commit-ID: 3hHsS5N7WRI

--HG--
extra : rebase_source : 1c1ac7212626f1bf83b355dd27b1ddeae6df2e03
2017-04-11 17:13:01 +08:00

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27 KiB
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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 "nsCRT.h"
#include "nsIHttpChannel.h"
#include "nsIObserverService.h"
#include "nsIStringStream.h"
#include "nsIUploadChannel.h"
#include "nsIURI.h"
#include "nsIUrlClassifierDBService.h"
#include "nsUrlClassifierUtils.h"
#include "nsNetUtil.h"
#include "nsStreamUtils.h"
#include "nsStringStream.h"
#include "nsToolkitCompsCID.h"
#include "nsUrlClassifierStreamUpdater.h"
#include "mozilla/BasePrincipal.h"
#include "mozilla/ErrorNames.h"
#include "mozilla/Logging.h"
#include "nsIInterfaceRequestor.h"
#include "mozilla/LoadContext.h"
#include "mozilla/Telemetry.h"
#include "nsContentUtils.h"
#include "nsIURLFormatter.h"
#include "Classifier.h"
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
// 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.AppendPrintf(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 = EmptyString();
}
// 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)
/**
* Clear out the update.
*/
void
nsUrlClassifierStreamUpdater::DownloadDone()
{
LOG(("nsUrlClassifierStreamUpdater::DownloadDone [this=%p]", this));
mIsUpdating = false;
mPendingUpdates.Clear();
mDownloadError = false;
mSuccessCallback = nullptr;
mUpdateErrorCallback = nullptr;
mDownloadErrorCallback = nullptr;
}
///////////////////////////////////////////////////////////////////////////////
// nsIUrlClassifierStreamUpdater implementation
nsresult
nsUrlClassifierStreamUpdater::FetchUpdate(nsIURI *aUpdateUrl,
const nsACString & aRequestPayload,
bool aIsPostRequest,
const nsACString & aStreamTable)
{
#ifdef DEBUG
LOG(("Fetching update %s from %s",
aRequestPayload.Data(), aUpdateUrl->GetSpecOrDefault().get()));
#endif
nsresult rv;
uint32_t loadFlags = nsIChannel::INHIBIT_CACHING |
nsIChannel::LOAD_BYPASS_CACHE;
rv = NS_NewChannel(getter_AddRefs(mChannel),
aUpdateUrl,
nsContentUtils::GetSystemPrincipal(),
nsILoadInfo::SEC_ALLOW_CROSS_ORIGIN_DATA_IS_NULL,
nsIContentPolicy::TYPE_OTHER,
nullptr, // aLoadGroup
this, // aInterfaceRequestor
loadFlags);
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsILoadInfo> loadInfo = mChannel->GetLoadInfo();
mozilla::OriginAttributes attrs;
attrs.mFirstPartyDomain.AssignLiteral(NECKO_SAFEBROWSING_FIRST_PARTY_DOMAIN);
if (loadInfo) {
loadInfo->SetOriginAttributes(attrs);
}
mBeganStream = false;
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(NS_LITERAL_CSTRING("X-HTTP-Method-Override"),
NS_LITERAL_CSTRING("POST"),
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.
bool match;
if ((NS_SUCCEEDED(aUpdateUrl->SchemeIs("file", &match)) && match) ||
(NS_SUCCEEDED(aUpdateUrl->SchemeIs("data", &match)) && match)) {
mChannel->SetContentType(NS_LITERAL_CSTRING("application/vnd.google.safebrowsing-update"));
} 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(NS_LITERAL_CSTRING("Connection"), NS_LITERAL_CSTRING("close"), false);
NS_ENSURE_SUCCESS(rv, rv);
}
// Make the request.
rv = mChannel->AsyncOpen2(this);
NS_ENSURE_SUCCESS(rv, rv);
mTelemetryClockStart = PR_IntervalNow();
mStreamTable = aStreamTable;
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;
PendingRequest *request = mPendingRequests.AppendElement();
request->mTables = aRequestTables;
request->mRequestPayload = aRequestPayload;
request->mIsPostRequest = aIsPostRequest;
request->mUrl = aUpdateUrl;
request->mSuccessCallback = aSuccessCallback;
request->mUpdateErrorCallback = aUpdateErrorCallback;
request->mDownloadErrorCallback = aDownloadErrorCallback;
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 = do_GetService(NS_URLCLASSIFIERDBSERVICE_CONTRACTID, &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;
PendingRequest *request = mPendingRequests.AppendElement();
request->mTables = aRequestTables;
request->mRequestPayload = aRequestPayload;
request->mIsPostRequest = aIsPostRequest;
request->mUrl = aUpdateUrl;
request->mSuccessCallback = aSuccessCallback;
request->mUpdateErrorCallback = aUpdateErrorCallback;
request->mDownloadErrorCallback = aDownloadErrorCallback;
// 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.
nsresult rv;
mFetchNextRequestTimer = do_CreateInstance("@mozilla.org/timer;1", &rv);
if (NS_SUCCEEDED(rv)) {
rv = mFetchNextRequestTimer->InitWithCallback(this,
FETCH_NEXT_REQUEST_RETRY_DELAY_MS,
nsITimer::TYPE_ONE_SHOT);
}
return NS_OK;
}
if (NS_FAILED(rv)) {
return rv;
}
nsCOMPtr<nsIUrlClassifierUtils> urlUtil =
do_GetService(NS_URLCLASSIFIERUTILS_CONTRACTID);
nsTArray<nsCString> tables;
mozilla::safebrowsing::Classifier::SplitTables(aRequestTables, tables);
urlUtil->GetTelemetryProvider(tables.SafeElementAt(0, EmptyCString()),
mTelemetryProvider);
mSuccessCallback = aSuccessCallback;
mUpdateErrorCallback = aUpdateErrorCallback;
mDownloadErrorCallback = aDownloadErrorCallback;
mIsUpdating = true;
*_retval = true;
LOG(("FetchUpdate: %s", aUpdateUrl.Data()));
return FetchUpdate(aUpdateUrl, aRequestPayload, aIsPostRequest, EmptyCString());
}
///////////////////////////////////////////////////////////////////////////////
// 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();
if (!update)
return NS_ERROR_OUT_OF_MEMORY;
// Allow data: and file: urls for unit testing purposes, otherwise assume http
if (StringBeginsWith(aUrl, NS_LITERAL_CSTRING("data:")) ||
StringBeginsWith(aUrl, NS_LITERAL_CSTRING("file:"))) {
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, NS_LITERAL_CSTRING("localhost"))) {
update->mUrl = NS_LITERAL_CSTRING("https://") + aUrl;
} else {
update->mUrl = NS_LITERAL_CSTRING("http://") + 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,
EmptyCString(),
true, // This method is for v2 and v2 is always a POST.
update.mTable);
if (NS_FAILED(rv)) {
LOG(("Error fetching update url: %s\n", 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;
}
PendingRequest 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;
}
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;
LOG(("nsUrlClassifierStreamUpdater::StreamFinished [%" PRIx32 ", %d]",
static_cast<uint32_t>(status), 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;
mFetchIndirectUpdatesTimer = do_CreateInstance("@mozilla.org/timer;1", &rv);
if (NS_SUCCEEDED(rv)) {
rv = mFetchIndirectUpdatesTimer->InitWithCallback(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 : mSuccessCallback.get();
nsCOMPtr<nsIUrlClassifierCallback> downloadErrorCallback = mDownloadError ? 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 = EmptyCString();
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 : mUpdateErrorCallback.get();
nsCOMPtr<nsIUrlClassifierCallback> downloadErrorCallback = mDownloadError ? mDownloadErrorCallback.get() : nullptr;
DownloadDone();
nsAutoCString strResult;
strResult.AppendInt(static_cast<uint32_t>(result));
if (errorCallback) {
errorCallback->HandleEvent(strResult);
} else if (downloadErrorCallback) {
LOG(("Notify download error callback in UpdateError [this=%p]", this));
downloadErrorCallback->HandleEvent(mDownloadErrorStatusStr);
mDownloadErrorStatusStr = EmptyCString();
}
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,
NS_LITERAL_CSTRING("text/plain"),
-1);
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIHttpChannel> httpChannel = do_QueryInterface(mChannel, &rv);
NS_ENSURE_SUCCESS(rv, rv);
rv = httpChannel->SetRequestMethod(NS_LITERAL_CSTRING("POST"));
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}
// We might need to expand the bucket here if telemetry shows lots of errors
// are neither connection errors nor DNS errors.
static uint8_t NetworkErrorToBucket(nsresult rv)
{
switch(rv) {
// Connection errors
case NS_ERROR_ALREADY_CONNECTED: return 2;
case NS_ERROR_NOT_CONNECTED: return 3;
case NS_ERROR_CONNECTION_REFUSED: return 4;
case NS_ERROR_NET_TIMEOUT: return 5;
case NS_ERROR_OFFLINE: return 6;
case NS_ERROR_PORT_ACCESS_NOT_ALLOWED: return 7;
case NS_ERROR_NET_RESET: return 8;
case NS_ERROR_NET_INTERRUPT: return 9;
case NS_ERROR_PROXY_CONNECTION_REFUSED: return 10;
case NS_ERROR_NET_PARTIAL_TRANSFER: return 11;
case NS_ERROR_NET_INADEQUATE_SECURITY: return 12;
// DNS errors
case NS_ERROR_UNKNOWN_HOST: return 13;
case NS_ERROR_DNS_LOOKUP_QUEUE_FULL: return 14;
case NS_ERROR_UNKNOWN_PROXY_HOST: return 15;
// Others
default: return 1;
}
}
// Map the HTTP response code to a Telemetry bucket
static uint32_t HTTPStatusToBucket(uint32_t status)
{
uint32_t statusBucket;
switch (status) {
case 100:
case 101:
// Unexpected 1xx return code
statusBucket = 0;
break;
case 200:
// OK - Data is available in the HTTP response body.
statusBucket = 1;
break;
case 201:
case 202:
case 203:
case 205:
case 206:
// Unexpected 2xx return code
statusBucket = 2;
break;
case 204:
// No Content
statusBucket = 3;
break;
case 300:
case 301:
case 302:
case 303:
case 304:
case 305:
case 307:
case 308:
// Unexpected 3xx return code
statusBucket = 4;
break;
case 400:
// Bad Request - The HTTP request was not correctly formed.
// The client did not provide all required CGI parameters.
statusBucket = 5;
break;
case 401:
case 402:
case 405:
case 406:
case 407:
case 409:
case 410:
case 411:
case 412:
case 414:
case 415:
case 416:
case 417:
case 421:
case 426:
case 428:
case 429:
case 431:
case 451:
// Unexpected 4xx return code
statusBucket = 6;
break;
case 403:
// Forbidden - The client id is invalid.
statusBucket = 7;
break;
case 404:
// Not Found
statusBucket = 8;
break;
case 408:
// Request Timeout
statusBucket = 9;
break;
case 413:
// Request Entity Too Large - Bug 1150334
statusBucket = 10;
break;
case 500:
case 501:
case 510:
// Unexpected 5xx return code
statusBucket = 11;
break;
case 502:
case 504:
case 511:
// Local network errors, we'll ignore these.
statusBucket = 12;
break;
case 503:
// Service Unavailable - The server cannot handle the request.
// Clients MUST follow the backoff behavior specified in the
// Request Frequency section.
statusBucket = 13;
break;
case 505:
// HTTP Version Not Supported - The server CANNOT handle the requested
// protocol major version.
statusBucket = 14;
break;
default:
statusBucket = 15;
};
return statusBucket;
}
///////////////////////////////////////////////////////////////////////////////
// nsIStreamListenerObserver implementation
NS_IMETHODIMP
nsUrlClassifierStreamUpdater::OnStartRequest(nsIRequest *request,
nsISupports* context)
{
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 (MOZ_LOG_TEST(gUrlClassifierStreamUpdaterLog, mozilla::LogLevel::Debug)) {
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);
}
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));
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(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,
nsISupports* context,
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, nsISupports* context,
nsresult aStatus)
{
if (!mDBService)
return NS_ERROR_NOT_INITIALIZED;
LOG(("OnStopRequest (status %" PRIx32 ", beganStream %s, this=%p)",
static_cast<uint32_t>(aStatus), 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.
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();
}
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;
}
}
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;
}
MOZ_ASSERT_UNREACHABLE("A timer is fired from nowhere.");
return NS_OK;
}
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