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/* 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/. */
// COMPLETE_LENGTH and PARTIAL_LENGTH copied from nsUrlClassifierDBService.h,
// they correspond to the length, in bytes, of a hash prefix and the total
// hash.
const COMPLETE_LENGTH = 32;
const PARTIAL_LENGTH = 4;
// Upper limit on the server response minimumWaitDuration
const MIN_WAIT_DURATION_MAX_VALUE = 24 * 60 * 60 * 1000;
const PREF_DEBUG_ENABLED = "browser.safebrowsing.debug";
const { XPCOMUtils } = ChromeUtils.import(
);
const { Services } = ChromeUtils.import("resource://gre/modules/Services.jsm");
const { NetUtil } = ChromeUtils.import("resource://gre/modules/NetUtil.jsm");
XPCOMUtils.defineLazyServiceGetter(
this,
"gDbService",
"@mozilla.org/url-classifier/dbservice;1",
"nsIUrlClassifierDBService"
);
XPCOMUtils.defineLazyServiceGetter(
this,
"gUrlUtil",
"@mozilla.org/url-classifier/utils;1",
"nsIUrlClassifierUtils"
);
let loggingEnabled = false;
// Log only if browser.safebrowsing.debug is true
function log(...stuff) {
if (!loggingEnabled) {
return;
}
var d = new Date();
let msg = "hashcompleter: " + d.toTimeString() + ": " + stuff.join(" ");
dump(Services.urlFormatter.trimSensitiveURLs(msg) + "\n");
}
// Map the HTTP response code to a Telemetry bucket
// eslint-disable-next-line complexity
function httpStatusToBucket(httpStatus) {
var statusBucket;
switch (httpStatus) {
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 - There are no full-length hashes with the requested prefix.
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;
}
function FullHashMatch(table, hash, duration) {
this.tableName = table;
this.fullHash = hash;
this.cacheDuration = duration;
}
FullHashMatch.prototype = {
QueryInterface: ChromeUtils.generateQI(["nsIFullHashMatch"]),
tableName: null,
fullHash: null,
cacheDuration: null,
};
function HashCompleter() {
// The current HashCompleterRequest in flight. Once it is started, it is set
// to null. It may be used by multiple calls to |complete| in succession to
// avoid creating multiple requests to the same gethash URL.
this._currentRequest = null;
// An Array of ongoing gethash requests which is used to find requests for
// the same hash prefix.
this._ongoingRequests = [];
// A map of gethashUrls to HashCompleterRequests that haven't yet begun.
this._pendingRequests = {};
// A map of gethash URLs to RequestBackoff objects.
this._backoffs = {};
// Whether we have been informed of a shutdown by the shutdown event.
this._shuttingDown = false;
// A map of gethash URLs to next gethash time in miliseconds
this._nextGethashTimeMs = {};
Services.obs.addObserver(this, "quit-application");
Services.prefs.addObserver(PREF_DEBUG_ENABLED, this);
loggingEnabled = Services.prefs.getBoolPref(PREF_DEBUG_ENABLED);
}
HashCompleter.prototype = {
classID: Components.ID("{9111de73-9322-4bfc-8b65-2b727f3e6ec8}"),
QueryInterface: ChromeUtils.generateQI([
"nsIUrlClassifierHashCompleter",
"nsIRunnable",
"nsIObserver",
"nsISupportsWeakReference",
"nsITimerCallback",
]),
// This is mainly how the HashCompleter interacts with other components.
// Even though it only takes one partial hash and callback, subsequent
// calls are made into the same HTTP request by using a thread dispatch.
complete: function HC_complete(
aPartialHash,
aGethashUrl,
aTableName,
aCallback
) {
if (!aGethashUrl) {
throw Components.Exception("", Cr.NS_ERROR_NOT_INITIALIZED);
}
// Check ongoing requests before creating a new HashCompleteRequest
for (let r of this._ongoingRequests) {
if (r.find(aPartialHash, aGethashUrl, aTableName)) {
log(
"Merge gethash request in " +
aTableName +
" for prefix : " +
btoa(aPartialHash)
);
r.add(aPartialHash, aCallback, aTableName);
return;
}
}
if (!this._currentRequest) {
this._currentRequest = new HashCompleterRequest(this, aGethashUrl);
}
if (this._currentRequest.gethashUrl == aGethashUrl) {
this._currentRequest.add(aPartialHash, aCallback, aTableName);
} else {
if (!this._pendingRequests[aGethashUrl]) {
this._pendingRequests[aGethashUrl] = new HashCompleterRequest(
this,
aGethashUrl
);
}
this._pendingRequests[aGethashUrl].add(
aPartialHash,
aCallback,
aTableName
);
}
if (!this._backoffs[aGethashUrl]) {
// Initialize request backoffs separately, since requests are deleted
// after they are dispatched.
var jslib = Cc["@mozilla.org/url-classifier/jslib;1"].getService()
.wrappedJSObject;
// Using the V4 backoff algorithm for both V2 and V4. See bug 1273398.
this._backoffs[aGethashUrl] = new jslib.RequestBackoffV4(
10 /* keep track of max requests */,
0 /* don't throttle on successful requests per time period */,
gUrlUtil.getProvider(aTableName) /* used by testcase */
);
}
if (!this._nextGethashTimeMs[aGethashUrl]) {
this._nextGethashTimeMs[aGethashUrl] = 0;
}
// Start off this request. Without dispatching to a thread, every call to
// complete makes an individual HTTP request.
Services.tm.dispatchToMainThread(this);
},
// This is called after several calls to |complete|, or after the
// currentRequest has finished. It starts off the HTTP request by making a
// |begin| call to the HashCompleterRequest.
run() {
// Clear everything on shutdown
if (this._shuttingDown) {
this._currentRequest = null;
this._pendingRequests = null;
this._nextGethashTimeMs = null;
for (var url in this._backoffs) {
this._backoffs[url] = null;
}
throw Components.Exception("", Cr.NS_ERROR_NOT_INITIALIZED);
}
// If we don't have an in-flight request, make one
let pendingUrls = Object.keys(this._pendingRequests);
if (!this._currentRequest && pendingUrls.length) {
let nextUrl = pendingUrls[0];
this._currentRequest = this._pendingRequests[nextUrl];
delete this._pendingRequests[nextUrl];
}
if (this._currentRequest) {
try {
if (this._currentRequest.begin()) {
this._ongoingRequests.push(this._currentRequest);
}
} finally {
// If |begin| fails, we should get rid of our request.
this._currentRequest = null;
}
}
},
// Pass the server response status to the RequestBackoff for the given
// gethashUrl and fetch the next pending request, if there is one.
finishRequest(aRequest, aStatus) {
this._ongoingRequests = this._ongoingRequests.filter(v => v != aRequest);
this._backoffs[aRequest.gethashUrl].noteServerResponse(aStatus);
Services.tm.dispatchToMainThread(this);
},
// Returns true if we can make a request from the given url, false otherwise.
canMakeRequest(aGethashUrl) {
return (
this._backoffs[aGethashUrl].canMakeRequest() &&
Date.now() >= this._nextGethashTimeMs[aGethashUrl]
);
},
// Notifies the RequestBackoff of a new request so we can throttle based on
// max requests/time period. This must be called before a channel is opened,
// and finishRequest must be called once the response is received.
noteRequest(aGethashUrl) {
return this._backoffs[aGethashUrl].noteRequest();
},
observe: function HC_observe(aSubject, aTopic, aData) {
switch (aTopic) {
case "quit-application":
this._shuttingDown = true;
Services.obs.removeObserver(this, "quit-application");
break;
case "nsPref:changed":
if (aData == PREF_DEBUG_ENABLED) {
loggingEnabled = Services.prefs.getBoolPref(PREF_DEBUG_ENABLED);
}
break;
}
},
};
function HashCompleterRequest(aCompleter, aGethashUrl) {
// HashCompleter object that created this HashCompleterRequest.
this._completer = aCompleter;
// The internal set of hashes and callbacks that this request corresponds to.
this._requests = [];
// nsIChannel that the hash completion query is transmitted over.
this._channel = null;
// Response body of hash completion. Created in onDataAvailable.
this._response = "";
// Whether we have been informed of a shutdown by the quit-application event.
this._shuttingDown = false;
this.gethashUrl = aGethashUrl;
this.provider = "";
// Multiple partial hashes can be associated with the same tables
// so we use a map here.
this.tableNames = new Map();
this.telemetryProvider = "";
this.telemetryClockStart = 0;
}
HashCompleterRequest.prototype = {
QueryInterface: ChromeUtils.generateQI([
"nsIRequestObserver",
"nsIStreamListener",
"nsIObserver",
]),
// This is called by the HashCompleter to add a hash and callback to the
// HashCompleterRequest. It must be called before calling |begin|.
add: function HCR_add(aPartialHash, aCallback, aTableName) {
this._requests.push({
partialHash: aPartialHash,
callback: aCallback,
tableName: aTableName,
response: { matches: [] },
});
if (aTableName) {
let isTableNameV4 = aTableName.endsWith("-proto");
if (0 === this.tableNames.size) {
// Decide if this request is v4 by the first added partial hash.
this.isV4 = isTableNameV4;
} else if (this.isV4 !== isTableNameV4) {
log(
'ERROR: Cannot mix "proto" tables with other types within ' +
"the same gethash URL."
);
}
if (!this.tableNames.has(aTableName)) {
this.tableNames.set(aTableName);
}
// Assuming all tables with the same gethash URL have the same provider
if (this.provider == "") {
this.provider = gUrlUtil.getProvider(aTableName);
}
if (this.telemetryProvider == "") {
this.telemetryProvider = gUrlUtil.getTelemetryProvider(aTableName);
}
}
},
find: function HCR_find(aPartialHash, aGetHashUrl, aTableName) {
if (this.gethashUrl != aGetHashUrl || !this.tableNames.has(aTableName)) {
return false;
}
return this._requests.find(function(r) {
return r.partialHash === aPartialHash;
});
},
fillTableStatesBase64: function HCR_fillTableStatesBase64(aCallback) {
gDbService.getTables(aTableData => {
aTableData.split("\n").forEach(line => {
let p = line.indexOf(";");
if (-1 === p) {
return;
}
// [tableName];[stateBase64]:[checksumBase64]
let tableName = line.substring(0, p);
if (this.tableNames.has(tableName)) {
let metadata = line.substring(p + 1).split(":");
let stateBase64 = metadata[0];
this.tableNames.set(tableName, stateBase64);
}
});
aCallback();
});
},
// This initiates the HTTP request. It can fail due to backoff timings and
// will notify all callbacks as necessary. We notify the backoff object on
// begin.
begin: function HCR_begin() {
if (!this._completer.canMakeRequest(this.gethashUrl)) {
log("Can't make request to " + this.gethashUrl + "\n");
this.notifyFailure(Cr.NS_ERROR_ABORT);
return false;
}
Services.obs.addObserver(this, "quit-application");
// V4 requires table states to build the request so we need
// a async call to retrieve the table states from disk.
// Note that |HCR_begin| is fine to be sync because
// it doesn't appear in a sync call chain.
this.fillTableStatesBase64(() => {
try {
this.openChannel();
// Notify the RequestBackoff if opening the channel succeeded. At this
// point, finishRequest must be called.
this._completer.noteRequest(this.gethashUrl);
} catch (err) {
this._completer._ongoingRequests = this._completer._ongoingRequests.filter(
v => v != this
);
this.notifyFailure(err);
throw err;
}
});
return true;
},
notify: function HCR_notify() {
// If we haven't gotten onStopRequest, just cancel. This will call us
// with onStopRequest since we implement nsIStreamListener on the
// channel.
if (this._channel && this._channel.isPending()) {
log("cancelling request to " + this.gethashUrl + " (timeout)\n");
Services.telemetry
.getKeyedHistogramById("URLCLASSIFIER_COMPLETE_TIMEOUT2")
.add(this.telemetryProvider, 1);
this._channel.cancel(Cr.NS_BINDING_ABORTED);
}
},
// Creates an nsIChannel for the request and fills the body.
// Enforce bypassing URL Classifier check because if the request is
// blocked, it means SafeBrowsing is malfunction.
openChannel: function HCR_openChannel() {
let loadFlags =
Ci.nsIChannel.INHIBIT_CACHING |
Ci.nsIChannel.LOAD_BYPASS_CACHE |
Ci.nsIChannel.LOAD_BYPASS_URL_CLASSIFIER;
this.request = {
url: this.gethashUrl,
body: "",
};
if (this.isV4) {
// As per spec, we add the request payload to the gethash url.
this.request.url += "&$req=" + this.buildRequestV4();
}
log("actualGethashUrl: " + this.request.url);
let channel = NetUtil.newChannel({
uri: this.request.url,
loadUsingSystemPrincipal: true,
});
channel.loadFlags = loadFlags;
channel.loadInfo.originAttributes = {
// The firstPartyDomain value should sync with NECKO_SAFEBROWSING_FIRST_PARTY_DOMAIN
// defined in nsNetUtil.h.
firstPartyDomain:
"safebrowsing.86868755-6b82-4842-b301-72671a0db32e.mozilla",
};
// Disable keepalive.
let httpChannel = channel.QueryInterface(Ci.nsIHttpChannel);
httpChannel.setRequestHeader("Connection", "close", false);
this._channel = channel;
if (this.isV4) {
httpChannel.setRequestHeader("X-HTTP-Method-Override", "POST", false);
} else {
let body = this.buildRequest();
this.addRequestBody(body);
}
// Set a timer that cancels the channel after timeout_ms in case we
// don't get a gethash response.
this.timer_ = Cc["@mozilla.org/timer;1"].createInstance(Ci.nsITimer);
// Ask the timer to use nsITimerCallback (.notify()) when ready
let timeout = Services.prefs.getIntPref("urlclassifier.gethash.timeout_ms");
this.timer_.initWithCallback(this, timeout, this.timer_.TYPE_ONE_SHOT);
channel.asyncOpen(this);
this.telemetryClockStart = Date.now();
},
buildRequestV4: function HCR_buildRequestV4() {
// Convert the "name to state" mapping to two equal-length arrays.
let tableNameArray = [];
let stateArray = [];
this.tableNames.forEach((state, name) => {
// We skip the table which is not associated with a state.
if (state) {
tableNameArray.push(name);
stateArray.push(state);
}
});
// Build the "distinct" prefix array.
// The array is sorted to make sure the entries are arbitrary mixed in a
// deterministic way
let prefixSet = new Set();
this._requests.forEach(r => prefixSet.add(btoa(r.partialHash)));
let prefixArray = Array.from(prefixSet).sort();
log(
"Build v4 gethash request with " +
JSON.stringify(tableNameArray) +
", " +
JSON.stringify(stateArray) +
", " +
JSON.stringify(prefixArray)
);
return gUrlUtil.makeFindFullHashRequestV4(
tableNameArray,
stateArray,
prefixArray
);
},
// Returns a string for the request body based on the contents of
// this._requests.
buildRequest: function HCR_buildRequest() {
// Sometimes duplicate entries are sent to HashCompleter but we do not need
// to propagate these to the server. (bug 633644)
let prefixes = [];
for (let i = 0; i < this._requests.length; i++) {
let request = this._requests[i];
if (!prefixes.includes(request.partialHash)) {
prefixes.push(request.partialHash);
}
}
// Sort to make sure the entries are arbitrary mixed in a deterministic way
prefixes.sort();
let body;
body =
PARTIAL_LENGTH +
":" +
PARTIAL_LENGTH * prefixes.length +
"\n" +
prefixes.join("");
log(
"Requesting completions for " +
prefixes.length +
" " +
PARTIAL_LENGTH +
"-byte prefixes: " +
body
);
return body;
},
// Sets the request body of this._channel.
addRequestBody: function HCR_addRequestBody(aBody) {
let inputStream = Cc[
"@mozilla.org/io/string-input-stream;1"
].createInstance(Ci.nsIStringInputStream);
inputStream.setData(aBody, aBody.length);
let uploadChannel = this._channel.QueryInterface(Ci.nsIUploadChannel);
uploadChannel.setUploadStream(inputStream, "text/plain", -1);
let httpChannel = this._channel.QueryInterface(Ci.nsIHttpChannel);
httpChannel.requestMethod = "POST";
},
// Parses the response body and eventually adds items to the |response.matches| array
// for elements of |this._requests|.
handleResponse: function HCR_handleResponse() {
if (this._response == "") {
return;
}
if (this.isV4) {
this.handleResponseV4();
return;
}
let start = 0;
let length = this._response.length;
while (start != length) {
start = this.handleTable(start);
}
},
handleResponseV4: function HCR_handleResponseV4() {
let callback = {
// onCompleteHashFound will be called for each fullhash found in
// FullHashResponse.
onCompleteHashFound: (
aCompleteHash,
aTableNames,
aPerHashCacheDuration
) => {
log(
"V4 fullhash response complete hash found callback: " +
aTableNames +
", CacheDuration(" +
aPerHashCacheDuration +
")"
);
// Filter table names which we didn't requested.
let filteredTables = aTableNames.split(",").filter(name => {
return this.tableNames.get(name);
});
if (0 === filteredTables.length) {
log("ERROR: Got complete hash which is from unknown table.");
return;
}
if (filteredTables.length > 1) {
log("WARNING: Got complete hash which has ambigious threat type.");
}
this.handleItem({
completeHash: aCompleteHash,
tableName: filteredTables[0],
cacheDuration: aPerHashCacheDuration,
});
},
// onResponseParsed will be called no matter if there is match in
// FullHashResponse, the callback is mainly used to pass negative cache
// duration and minimum wait duration.
onResponseParsed: (aMinWaitDuration, aNegCacheDuration) => {
log(
"V4 fullhash response parsed callback: " +
"MinWaitDuration(" +
aMinWaitDuration +
"), " +
"NegativeCacheDuration(" +
aNegCacheDuration +
")"
);
let minWaitDuration = aMinWaitDuration;
if (aMinWaitDuration > MIN_WAIT_DURATION_MAX_VALUE) {
log(
"WARNING: Minimum wait duration too large, clamping it down " +
"to a reasonable value."
);
minWaitDuration = MIN_WAIT_DURATION_MAX_VALUE;
} else if (aMinWaitDuration < 0) {
log("WARNING: Minimum wait duration is negative, reset it to 0");
minWaitDuration = 0;
}
this._completer._nextGethashTimeMs[this.gethashUrl] =
Date.now() + minWaitDuration;
// A fullhash request may contain more than one prefix, so the negative
// cache duration should be set for all the prefixes in the request.
this._requests.forEach(request => {
request.response.negCacheDuration = aNegCacheDuration;
});
},
};
gUrlUtil.parseFindFullHashResponseV4(this._response, callback);
},
// This parses a table entry in the response body and calls |handleItem|
// for complete hash in the table entry.
handleTable: function HCR_handleTable(aStart) {
let body = this._response.substring(aStart);
// deal with new line indexes as there could be
// new line characters in the data parts.
let newlineIndex = body.indexOf("\n");
if (newlineIndex == -1) {
throw errorWithStack();
}
let header = body.substring(0, newlineIndex);
let entries = header.split(":");
if (entries.length != 3) {
throw errorWithStack();
}
let list = entries[0];
let addChunk = parseInt(entries[1]);
let dataLength = parseInt(entries[2]);
log("Response includes add chunks for " + list + ": " + addChunk);
if (
dataLength % COMPLETE_LENGTH != 0 ||
dataLength == 0 ||
dataLength > body.length - (newlineIndex + 1)
) {
throw errorWithStack();
}
let data = body.substr(newlineIndex + 1, dataLength);
for (let i = 0; i < dataLength / COMPLETE_LENGTH; i++) {
this.handleItem({
completeHash: data.substr(i * COMPLETE_LENGTH, COMPLETE_LENGTH),
tableName: list,
chunkId: addChunk,
});
}
return aStart + newlineIndex + 1 + dataLength;
},
// This adds a complete hash to any entry in |this._requests| that matches
// the hash.
handleItem: function HCR_handleItem(aData) {
let provider = gUrlUtil.getProvider(aData.tableName);
if (provider != this.provider) {
log(
"Ignoring table " +
aData.tableName +
" since it belongs to " +
provider +
" while the response came from " +
this.provider +
"."
);
return;
}
for (let i = 0; i < this._requests.length; i++) {
let request = this._requests[i];
if (aData.completeHash.startsWith(request.partialHash)) {
request.response.matches.push(aData);
}
}
},
// notifySuccess and notifyFailure are used to alert the callbacks with
// results. notifySuccess makes |completion| and |completionFinished| calls
// while notifyFailure only makes a |completionFinished| call with the error
// code.
notifySuccess: function HCR_notifySuccess() {
// V2 completion handler
let completionV2 = req => {
req.response.matches.forEach(m => {
req.callback.completionV2(m.completeHash, m.tableName, m.chunkId);
});
req.callback.completionFinished(Cr.NS_OK);
};
// V4 completion handler
let completionV4 = req => {
let matches = Cc["@mozilla.org/array;1"].createInstance(
Ci.nsIMutableArray
);
req.response.matches.forEach(m => {
matches.appendElement(
new FullHashMatch(m.tableName, m.completeHash, m.cacheDuration)
);
});
req.callback.completionV4(
req.partialHash,
req.tableName,
req.response.negCacheDuration,
matches
);
req.callback.completionFinished(Cr.NS_OK);
};
let completion = this.isV4 ? completionV4 : completionV2;
this._requests.forEach(req => {
completion(req);
});
},
notifyFailure: function HCR_notifyFailure(aStatus) {
log("notifying failure\n");
for (let i = 0; i < this._requests.length; i++) {
let request = this._requests[i];
request.callback.completionFinished(aStatus);
}
},
onDataAvailable: function HCR_onDataAvailable(
aRequest,
aInputStream,
aOffset,
aCount
) {
let sis = Cc["@mozilla.org/scriptableinputstream;1"].createInstance(
Ci.nsIScriptableInputStream
);
sis.init(aInputStream);
this._response += sis.readBytes(aCount);
},
onStartRequest: function HCR_onStartRequest(aRequest) {
// At this point no data is available for us and we have no reason to
// terminate the connection, so we do nothing until |onStopRequest|.
this._completer._nextGethashTimeMs[this.gethashUrl] = 0;
if (this.telemetryClockStart > 0) {
let msecs = Date.now() - this.telemetryClockStart;
Services.telemetry
.getKeyedHistogramById("URLCLASSIFIER_COMPLETE_SERVER_RESPONSE_TIME")
.add(this.telemetryProvider, msecs);
}
},
onStopRequest: function HCR_onStopRequest(aRequest, aStatusCode) {
Services.obs.removeObserver(this, "quit-application");
if (this.timer_) {
this.timer_.cancel();
this.timer_ = null;
}
this.telemetryClockStart = 0;
if (this._shuttingDown) {
throw Components.Exception("", Cr.NS_ERROR_ABORT);
}
// Default HTTP status to service unavailable, in case we can't retrieve
// the true status from the channel.
let httpStatus = 503;
if (Components.isSuccessCode(aStatusCode)) {
let channel = aRequest.QueryInterface(Ci.nsIHttpChannel);
let success = channel.requestSucceeded;
httpStatus = channel.responseStatus;
if (!success) {
aStatusCode = Cr.NS_ERROR_ABORT;
}
}
let success = Components.isSuccessCode(aStatusCode);
log(
"Received a " +
httpStatus +
" status code from the " +
this.provider +
" gethash server (success=" +
success +
"): " +
btoa(this._response)
);
Services.telemetry
.getKeyedHistogramById("URLCLASSIFIER_COMPLETE_REMOTE_STATUS2")
.add(this.telemetryProvider, httpStatusToBucket(httpStatus));
if (httpStatus == 400) {
dump(
"Safe Browsing server returned a 400 during completion: request= " +
this.request.url +
",payload= " +
this.request.body +
"\n"
);
}
Services.telemetry
.getKeyedHistogramById("URLCLASSIFIER_COMPLETE_TIMEOUT2")
.add(this.telemetryProvider, 0);
// Notify the RequestBackoff once a response is received.
this._completer.finishRequest(this, httpStatus);
if (success) {
try {
this.handleResponse();
} catch (err) {
log(err.stack);
aStatusCode = err.value;
success = false;
}
}
if (success) {
this.notifySuccess();
} else {
this.notifyFailure(aStatusCode);
}
},
observe: function HCR_observe(aSubject, aTopic, aData) {
if (aTopic == "quit-application") {
this._shuttingDown = true;
if (this._channel) {
this._channel.cancel(Cr.NS_ERROR_ABORT);
this.telemetryClockStart = 0;
}
Services.obs.removeObserver(this, "quit-application");
}
},
};
function errorWithStack() {
let err = new Error();
err.value = Cr.NS_ERROR_FAILURE;
return err;
}
var EXPORTED_SYMBOLS = ["HashCompleter"];