gecko/netwerk/test/unit/test_content_sniffer.js

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// This file tests nsIContentSniffer, introduced in bug 324985
do_import_script("netwerk/test/httpserver/httpd.js");
const unknownType = "application/x-unknown-content-type";
const sniffedType = "application/x-sniffed";
const snifferCID = Components.ID("{4c93d2db-8a56-48d7-b261-9cf2a8d998eb}");
const snifferContract = "@mozilla.org/network/unittest/contentsniffer;1";
const categoryName = "net-content-sniffers";
var sniffing_enabled = true;
/**
* This object is both a factory and an nsIContentSniffer implementation (so, it
* is de-facto a service)
*/
var sniffer = {
QueryInterface: function sniffer_qi(iid) {
if (iid.equals(Components.interfaces.nsISupports) ||
iid.equals(Components.interfaces.nsIFactory) ||
iid.equals(Components.interfaces.nsIContentSniffer))
return this;
throw Components.results.NS_ERROR_NO_INTERFACE;
},
createInstance: function sniffer_ci(outer, iid) {
if (outer)
throw Components.results.NS_ERROR_NO_AGGREGATION;
return this.QueryInterface(iid);
},
lockFactory: function sniffer_lockf(lock) {
throw Components.results.NS_ERROR_NOT_IMPLEMENTED;
},
getMIMETypeFromContent: function (request, data, length) {
return sniffedType;
}
};
var listener = {
onStartRequest: function test_onStartR(request, ctx) {
try {
var chan = request.QueryInterface(Components.interfaces.nsIChannel);
if (chan.contentType == unknownType)
do_throw("Type should not be unknown!");
if (sniffing_enabled && this._iteration > 2 &&
chan.contentType != sniffedType) {
do_throw("Expecting <" + sniffedType +"> but got <" +
chan.contentType + "> for " + chan.URI.spec);
} else if (!sniffing_enabled && chan.contentType == sniffedType) {
do_throw("Sniffing not enabled but sniffer called for " + chan.URI.spec);
}
} catch (e) {
do_throw("Unexpected exception: " + e);
}
throw Components.results.NS_ERROR_ABORT;
},
onDataAvailable: function test_ODA() {
throw Components.results.NS_ERROR_UNEXPECTED;
},
onStopRequest: function test_onStopR(request, ctx, status) {
run_test_iteration(this._iteration);
do_test_finished();
},
_iteration: 1
};
function makeChan(url) {
var ios = Components.classes["@mozilla.org/network/io-service;1"]
.getService(Components.interfaces.nsIIOService);
var chan = ios.newChannel(url, null, null);
if (sniffing_enabled)
chan.loadFlags |= Components.interfaces.nsIChannel.LOAD_CALL_CONTENT_SNIFFERS;
return chan;
}
var urls = [
// NOTE: First URL here runs without our content sniffer
"data:" + unknownType + ", Some text",
"data:" + unknownType + ", Text", // Make sure sniffing works even if we
// used the unknown content sniffer too
"data:text/plain, Some more text",
"http://localhost:4444"
];
var httpserv = null;
function run_test() {
httpserv = new nsHttpServer();
httpserv.start(4444);
Components.manager.nsIComponentRegistrar.registerFactory(snifferCID,
"Unit test content sniffer", snifferContract, sniffer);
run_test_iteration(1);
}
function run_test_iteration(index) {
if (index > urls.length) {
if (sniffing_enabled) {
sniffing_enabled = false;
index = listener._iteration = 1;
} else {
httpserv.stop();
return; // we're done
}
}
if (sniffing_enabled && index == 2) {
// Register our sniffer only here
// This also makes sure that dynamic registration is working
var catMan = Components.classes["@mozilla.org/categorymanager;1"]
.getService(Components.interfaces.nsICategoryManager);
catMan.nsICategoryManager.addCategoryEntry(categoryName, "unit test",
snifferContract, false, true);
}
var chan = makeChan(urls[index - 1]);
listener._iteration++;
chan.asyncOpen(listener, null);
do_test_pending();
}