Drop mcpc_buffer, use mc-ping-updated

This commit is contained in:
Cryptkeeper 2015-11-02 01:42:11 -06:00
parent a21ed3f6fb
commit f1eb418636
3 changed files with 17 additions and 173 deletions

@ -1,81 +0,0 @@
function CustomBuffer(existingBuffer) {
var buffer = existingBuffer || new Buffer(48);
var offset = 0;
this.writeVarInt = function(val) {
while (true) {
if ((val & 0xFFFFFF80) == 0) {
this.writeUByte(val);
return;
}
this.writeUByte(val & 0x7F | 0x80);
val = val >>> 7;
}
};
this.writeString = function(string) {
this.writeVarInt(string.length);
if (offset + string.length >= buffer.length) {
Buffer.concat([buffer, new Buffer(string.length)]);
}
buffer.write(string, offset, string.length, "UTF-8");
offset += string.length;
};
this.writeUShort = function(val) {
this.writeUByte(val >> 8);
this.writeUByte(val & 0xFF);
};
this.writeUByte = function(val) {
if (offset + 1 >= buffer.length) {
Buffer.concat([buffer, new Buffer(50)]);
}
buffer.writeUInt8(val, offset++);
};
this.readVarInt = function() {
var val = 0;
var count = 0;
while (true) {
var i = buffer.readUInt8(offset++);
val |= (i & 0x7F) << count++ * 7;
if ((i & 0x80) != 128) {
break
}
}
return val;
};
this.readString = function() {
var length = this.readVarInt();
var str = buffer.toString("UTF-8", offset, offset + length);
offset += length;
return str;
};
this.buffer = function() {
return buffer.slice(0, offset);
};
this.offset = function() {
return offset;
};
}
exports.createBuffer = function(buffer) {
return new CustomBuffer(buffer);
};

@ -1,100 +1,24 @@
var net = require('net');
var mcpe_ping = require('mcpe-ping');
var mcpc = require('./mcpc_buffer');
var mcpc_ping = require('mc-ping-updated');
function pingMinecraftPC(host, port, timeout, callback) {
var client = new net.Socket();
var milliseconds = (new Date).getTime();
client.setTimeout(timeout, function() {
client.destroy();
callback(new Error('timeout'), null);
});
client.connect(port, host, function() {
// Write out handshake packet.
var handshakeBuffer = mcpc.createBuffer();
handshakeBuffer.writeVarInt(0);
handshakeBuffer.writeVarInt(47);
handshakeBuffer.writeString(host);
handshakeBuffer.writeUShort(port);
handshakeBuffer.writeVarInt(1);
writePCBuffer(client, handshakeBuffer);
// Write the set connection state packet, we should get the MOTD after this.
var setModeBuffer = mcpc.createBuffer();
setModeBuffer.writeVarInt(0);
writePCBuffer(client, setModeBuffer);
});
var readingBuffer = new Buffer(0);
client.on('data', function(data) {
readingBuffer = Buffer.concat([readingBuffer, data]);
var buffer = mcpc.createBuffer(readingBuffer);
var length;
try {
length = buffer.readVarInt();
} catch(err) {
// The buffer isn't long enough yet, wait for more data!
return;
}
// Make sure we have the data we need!
if (readingBuffer.length < length - buffer.offset() ) {
return;
}
// Read the packet ID, throw it away.
buffer.readVarInt();
try {
var json = JSON.parse(buffer.readString());
// Remap our JSON into our custom structure.
var res = {
players: json.players,
version: json.version.protocol,
latency: (new Date).getTime() - milliseconds
};
if (json.favicon) {
res.favicon = json.favicon;
}
// We parsed it, send it along!
callback(null, res);
} catch (err) {
// Our data is corrupt? Fail hard.
callback(err, null);
return;
}
// We're done here.
client.destroy();
});
client.on('error', function(err) {
callback(err, null);
});
}
// Wraps our Buffer into another to fit the Minecraft protocol.
function writePCBuffer(client, buffer) {
var length = mcpc.createBuffer();
length.writeVarInt(buffer.buffer().length);
client.write(Buffer.concat([length.buffer(), buffer.buffer()]));
mcpc_ping(host, port, function(err, res) {
if (err) {
callback(err, null);
} else {
// Remap our JSON into our custom structure.
callback(null, {
players: {
online: res.players.online,
max: res.players.max
},
version: res.version.protocol,
latency: (new Date).getTime() - milliseconds
});
}
}, timeout);
}
// This is a wrapper function for mcpe-ping, mainly used to convert the data structure of the result.

@ -4,6 +4,7 @@
"description": "A Minecraft server tracker that lets you focus on the basics.",
"main": "app.js",
"dependencies": {
"mc-ping-updated": "0.0.6",
"mcpe-ping": "0.0.3",
"mime": "^1.3.4",
"socket.io": "^1.3.7",