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const CC = Components.Constructor;
const BinaryInputStream = CC("@mozilla.org/binaryinputstream;1",
"nsIBinaryInputStream",
"setInputStream");
function handleRequest(request, response)
{
var query = {};
request.queryString.split('&').forEach(function (val) {
var idx = val.indexOf('=');
query[val.slice(0, idx)] = unescape(val.slice(idx + 1));
});
var responseBody;
// Store fullhash in the server side.
if ("list" in query && "fullhash" in query) {
// In the server side we will store:
// 1. All the full hashes for a given list
// 2. All the lists we have right now
// data is separate by '\n'
let list = query["list"];
let hashes = getState(list);
let hash = base64ToString(query["fullhash"]);
hashes += hash + "\n";
setState(list, hashes);
let lists = getState("lists");
if (lists.indexOf(list) == -1) {
lists += list + "\n";
setState("lists", lists);
}
return;
// gethash count return how many gethash request received.
// This is used by client to know if a gethash request is triggered by gecko
} else if ("gethashcount" == request.queryString) {
var counter = getState("counter");
responseBody = counter == "" ? "0" : counter;
} else {
var body = new BinaryInputStream(request.bodyInputStream);
var avail;
var bytes = [];
while ((avail = body.available()) > 0) {
Array.prototype.push.apply(bytes, body.readByteArray(avail));
}
var counter = getState("counter");
counter = counter == "" ? "1" : (parseInt(counter) + 1).toString();
setState("counter", counter);
responseBody = parseV2Request(bytes);
}
response.setHeader("Content-Type", "text/plain", false);
response.write(responseBody);
}
function parseV2Request(bytes) {
var request = String.fromCharCode.apply(this, bytes);
var [HEADER, PREFIXES] = request.split("\n");
var [PREFIXSIZE, LENGTH] = HEADER.split(":").map(val => {
return parseInt(val);
});
var ret = "";
for(var start = 0; start < LENGTH; start += PREFIXSIZE) {
getState("lists").split("\n").forEach(function(list) {
var completions = getState(list).split("\n");
for (var completion of completions) {
if (completion.indexOf(PREFIXES.substr(start, PREFIXSIZE)) == 0) {
ret += list + ":" + "1" + ":" + "32" + "\n";
ret += completion;
}
}
});
}
return ret;
}
/* Convert Base64 data to a string */
const toBinaryTable = [
-1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1,
-1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,-1,
-1,-1,-1,-1, -1,-1,-1,-1, -1,-1,-1,62, -1,-1,-1,63,
52,53,54,55, 56,57,58,59, 60,61,-1,-1, -1, 0,-1,-1,
-1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10, 11,12,13,14,
15,16,17,18, 19,20,21,22, 23,24,25,-1, -1,-1,-1,-1,
-1,26,27,28, 29,30,31,32, 33,34,35,36, 37,38,39,40,
41,42,43,44, 45,46,47,48, 49,50,51,-1, -1,-1,-1,-1
];
const base64Pad = '=';
function base64ToString(data) {
var result = '';
var leftbits = 0; // number of bits decoded, but yet to be appended
var leftdata = 0; // bits decoded, but yet to be appended
// Convert one by one.
for (var i = 0; i < data.length; i++) {
var c = toBinaryTable[data.charCodeAt(i) & 0x7f];
var padding = (data[i] == base64Pad);
// Skip illegal characters and whitespace
if (c == -1) continue;
// Collect data into leftdata, update bitcount
leftdata = (leftdata << 6) | c;
leftbits += 6;
// If we have 8 or more bits, append 8 bits to the result
if (leftbits >= 8) {
leftbits -= 8;
// Append if not padding.
if (!padding)
result += String.fromCharCode((leftdata >> leftbits) & 0xff);
leftdata &= (1 << leftbits) - 1;
}
}
// If there are any bits left, the base64 string was corrupted
if (leftbits)
throw Components.Exception('Corrupted base64 string');
return result;
}
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