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easy-waf integration now waits for specific length of the request instead of immediately processing it

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Dorian Niemiec 2024-02-14 13:46:41 +01:00
parent 7bd72effe7
commit 5c96cd69b2
1 changed files with 82 additions and 14 deletions
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96
index.js
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@ -48,6 +48,9 @@ if(nodemailer && easywafconfig.mailConfig && easywafconfig.mailConfig.serverConf
mailtransport = nodemailer.createTransport(easywafconfig.mailConfig.serverConfig);
}
var maxRequestCheckedSize = easywafconfig.maxRequestCheckedSize ? easywafconfig.maxRequestCheckedSize : 65536;
var maxRequestCheckedSizeStrict = easywafconfig.maxRequestCheckedSizeStrict ? easywafconfig.maxRequestCheckedSizeStrict : false;
easywafconfig.preBlockHook = function(req, moduleInfo, ip) {
var returnvalue = true;
if(easywafhooks.preBlockHook) {
@ -110,17 +113,7 @@ Mod.prototype.callback = function callback(req, res, serverconsole, responseEnd,
logm[req.socket.remoteAddress] = serverconsole;
if(!logm[req.socket.remoteAddress].locwarnmessage) logm[req.socket.remoteAddress].locwarnmessage = logm[req.socket.remoteAddress].errmessage;
//req.body
function readableHandler() {
try {
if(req._readableState.buffer.head !== null) {
req.body = req._readableState.buffer.head.data.toString("latin1");
if (req.headers["content-type"] == "application/x-www-form-urlencoded") req.body = url.parse("?" + req.body.strip(), true).query;
if (req.headers["content-type"] == "application/json") req.body = JSON.parse(req.body.strip());
}
} catch (ex) {
}
function easyWafCallback() {
//EasyWaf
try {
easyWaf(req, res, function() {
@ -162,10 +155,85 @@ Mod.prototype.callback = function callback(req, res, serverconsole, responseEnd,
}
}
}
if(req._readableState.length > 0 || req._readableState.ended) {
readableHandler();
//req.body
function readableHandlerPredict() {
try {
if(req._readableState.buffer.head !== null) {
req.body = req._readableState.buffer.head.data.toString("latin1");
if (req.headers["content-type"] == "application/x-www-form-urlencoded") req.body = url.parse("?" + req.body.strip(), true).query;
if (req.headers["content-type"] == "application/json") req.body = JSON.parse(req.body.strip());
}
} catch (ex) {
}
easyWafCallback();
}
var chunkBuffer = [];
var chunkBufferLength = Math.min(parseInt(req.headers["content-length"]) - 1, maxRequestCheckSize);
var chunkBufferPointer = 0;
function readableHandlerWhole() {
var chunk = req.read(chunkBufferLength - chunkBufferPointer);
if(!chunk) chunk = req.read();
if(chunk) {
chunkBuffer.push(chunk);
chunkBufferPointer += chunk.length;
}
if(req._readableState.ended) {
req.removeListener("readable", readableHandlerWhole);
if (callServerError) {
callServerError(400, "easy-waf-integration/" + version);
} else {
req.once("readable", readableHandler);
res.writeHead(400, "Bad Request", {
"Server": "SVR.JS",
"Content-Type": "text/plain"
});
res.end("400 Bad Request!");
}
} else if(chunkBufferPointer >= chunkBufferLength) {
req.removeListener("readable", readableHandlerWhole);
try {
for(var i = chunkBuffer.length - 1; i >= 0; i--) {
req.unshift(chunkBuffer[i]);
}
} catch (ex) {
if (callServerError) {
callServerError(500, "easy-waf-integration/" + version, ex);
} else {
res.writeHead(500, "Internal Server Error", {
"Server": "SVR.JS",
"Content-Type": "text/plain"
});
res.end(ex.stack);
}
return;
}
req.body = "";
for(var i = 0; i < chunkBuffer.length; i++) {
req.body += chunkBuffer[i].toString("latin1");
}
easyWafCallback();
}
}
if(!req._readableState.ended && !isNaN(chunkBufferLength) && chunkBufferLength > 0) {
if(maxRequestCheckedSizeStrict && parseInt(req.headers["content-length"]) > maxRequestCheckSize) {
if (callServerError) {
callServerError(413, "easy-waf-integration/" + version);
} else {
res.writeHead(413, "Content Too Large", {
"Server": "SVR.JS",
"Content-Type": "text/plain"
});
res.end("413 Content Too Large!");
}
}
req.once("readable", readableHandlerWhole);
} else if(req._readableState.length > 0 || req._readableState.ended) {
readableHandlerPredict();
} else {
req.once("readable", readableHandlerPredict);
}
}
}