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// Test the plaintext-or-binary sniffer
"use strict";
const { HttpServer } = ChromeUtils.importESModule(
"resource://testing-common/httpd.sys.mjs"
);
// List of Content-Type headers to test. For each header we have an array.
// The first element in the array is the Content-Type header string. The
// second element in the array is a boolean indicating whether we allow
// sniffing for that type.
var contentTypeHeaderList = [
["text/plain", true],
["text/plain; charset=ISO-8859-1", true],
["text/plain; charset=iso-8859-1", true],
["text/plain; charset=UTF-8", true],
["text/plain; charset=unknown", false],
["text/plain; param", false],
["text/plain; charset=ISO-8859-1; param", false],
["text/plain; charset=iso-8859-1; param", false],
["text/plain; charset=UTF-8; param", false],
["text/plain; charset=utf-8", false],
["text/plain; charset=utf8", false],
["text/plain; charset=UTF8", false],
["text/plain; charset=iSo-8859-1", false],
];
// List of response bodies to test. For each response we have an array. The
// first element in the array is the body string. The second element in the
// array is a boolean indicating whether that string should sniff as binary.
var bodyList = [["Plaintext", false]];
// List of possible BOMs
var BOMList = [
"\xFE\xFF", // UTF-16BE
"\xFF\xFE", // UTF-16LE
"\xEF\xBB\xBF", // UTF-8
"\x00\x00\xFE\xFF", // UCS-4BE
"\x00\x00\xFF\xFE", // UCS-4LE
];
// Build up bodyList. The things we treat as binary are ASCII codes 0-8,
// 14-26, 28-31. That is, the control char range, except for tab, newline,
// vertical tab, form feed, carriage return, and ESC (this last being used by
// Shift_JIS, apparently).
function isBinaryChar(ch) {
return (
(0 <= ch && ch <= 8) || (14 <= ch && ch <= 26) || (28 <= ch && ch <= 31)
);
}
// Test chars on their own
var i;
for (i = 0; i <= 127; ++i) {
bodyList.push([String.fromCharCode(i), isBinaryChar(i)]);
}
// Test that having a BOM prevents plaintext sniffing
var j;
for (i = 0; i <= 127; ++i) {
for (j = 0; j < BOMList.length; ++j) {
bodyList.push([BOMList[j] + String.fromCharCode(i, i), false]);
}
}
// Test that having a BOM requires at least 4 chars to kick in
for (i = 0; i <= 127; ++i) {
for (j = 0; j < BOMList.length; ++j) {
bodyList.push([
BOMList[j] + String.fromCharCode(i),
BOMList[j].length == 2 && isBinaryChar(i),
]);
}
}
function makeChan(headerIdx, bodyIdx) {
var chan = NetUtil.newChannel({
uri:
"http://localhost:" +
httpserv.identity.primaryPort +
"/" +
headerIdx +
"/" +
bodyIdx,
loadUsingSystemPrincipal: true,
}).QueryInterface(Ci.nsIHttpChannel);
chan.loadFlags |= Ci.nsIChannel.LOAD_CALL_CONTENT_SNIFFERS;
return chan;
}
function makeListener(headerIdx, bodyIdx) {
var listener = {
onStartRequest: function test_onStartR(request) {
try {
var chan = request.QueryInterface(Ci.nsIChannel);
Assert.equal(chan.status, Cr.NS_OK);
var type = chan.contentType;
var expectedType =
contentTypeHeaderList[headerIdx][1] && bodyList[bodyIdx][1]
? "application/x-vnd.mozilla.guess-from-ext"
: "text/plain";
if (expectedType != type) {
do_throw(
"Unexpected sniffed type '" +
type +
"'. " +
"Should be '" +
expectedType +
"'. " +
"Header is ['" +
contentTypeHeaderList[headerIdx][0] +
"', " +
contentTypeHeaderList[headerIdx][1] +
"]. " +
"Body is ['" +
bodyList[bodyIdx][0].toSource() +
"', " +
bodyList[bodyIdx][1] +
"]."
);
}
Assert.equal(expectedType, type);
} catch (e) {
do_throw("Unexpected exception: " + e);
}
throw Components.Exception("", Cr.NS_ERROR_ABORT);
},
onDataAvailable: function test_ODA() {
do_throw("Should not get any data!");
},
onStopRequest: function test_onStopR() {
// Advance to next test
++headerIdx;
if (headerIdx == contentTypeHeaderList.length) {
headerIdx = 0;
++bodyIdx;
}
if (bodyIdx == bodyList.length) {
do_test_pending();
httpserv.stop(do_test_finished);
} else {
doTest(headerIdx, bodyIdx);
}
do_test_finished();
},
};
return listener;
}
function doTest(headerIdx, bodyIdx) {
var chan = makeChan(headerIdx, bodyIdx);
var listener = makeListener(headerIdx, bodyIdx);
chan.asyncOpen(listener);
do_test_pending();
}
function createResponse(headerIdx, bodyIdx, metadata, response) {
response.setHeader(
"Content-Type",
contentTypeHeaderList[headerIdx][0],
false
);
response.bodyOutputStream.write(
bodyList[bodyIdx][0],
bodyList[bodyIdx][0].length
);
}
function makeHandler(headerIdx, bodyIdx) {
var f = function handlerClosure(metadata, response) {
return createResponse(headerIdx, bodyIdx, metadata, response);
};
return f;
}
var httpserv;
function run_test() {
// disable on Windows for now, because it seems to leak sockets and die.
// Silly operating system!
// This is a really nasty way to detect Windows. I wish we could do better.
if (mozinfo.os == "win") {
//failing eslint no-empty test
}
httpserv = new HttpServer();
for (i = 0; i < contentTypeHeaderList.length; ++i) {
for (j = 0; j < bodyList.length; ++j) {
httpserv.registerPathHandler("/" + i + "/" + j, makeHandler(i, j));
}
}
httpserv.start(-1);
doTest(0, 0);
}
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