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Add support for hexadecimal input/output #5

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Add support for hexadecimal input/output #5

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86bfac5
Add support for hexadecimal input/output
jazzpi May 16, 2015
0ca5238
Code cleanup/Added support for `--hex-out` in `--connect` mode
jazzpi May 17, 2015
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38 changes: 37 additions & 1 deletion bin/wscat
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Original file line number Diff line number Diff line change
Expand Up @@ -96,6 +96,36 @@ function splitOnce(sep, str) { // sep can be either String or RegExp
return [tokens[0], str.replace(sep, '').substr(tokens[0].length)];
}

function fromHex(data) {
var bytes = data.split(' ');
data = '';
for (var i = 0; i < bytes.length; i++) {
data += String.fromCharCode(Number.parseInt(bytes[i], 16));
}
return data;
}

function toHex(data) {
if (data instanceof Buffer) {
o = '';
for (var i=0; i<data.length; i++) {
o += data.readUIntBE(i, 1).toString(16) + ' ';
}
} else if (data instanceof ArrayBuffer) {
var view = new Uint8Array(data);
var o = '';
for (var i=0; i<data.byteLength; i++) {
o += view[i].toString(16) + ' ';
}
} else if (typeof(data) === 'string') {
var o = '';
data.split('').forEach(function(c) {
o += c.charCodeAt(0).toString(16) + ' ';
});
}
return o;
}

/**
* The actual application
*/
Expand All @@ -113,6 +143,8 @@ program
.option('-n, --no-check', 'Do not check for unauthorized certificates')
.option('-H, --header <header:value>', 'Set an HTTP header. Repeat to set multiple. (--connect only)', appender(), [])
.option('--auth <username:password>', 'Add basic HTTP authentication header. (--connect only)')
.option('--hex-in', 'Read input lines as hexadecimal (separate bytes with spaces)')
.option('--hex-out', 'Output as hexadecimal')
.parse(process.argv);

if (program.listen && program.connect) {
Expand Down Expand Up @@ -144,6 +176,7 @@ if (program.listen && program.connect) {

wsConsole.on('line', function line(data) {
if (ws) {
if (program.hexIn) data = fromHex(data);
ws.send(data, { mask: false });
wsConsole.prompt();
}
Expand All @@ -165,6 +198,7 @@ if (program.listen && program.connect) {
}).on('error', function error(code, description) {
wsConsole.print('error: ' + code + (description ? ' ' + description : ''), Console.Colors.Yellow);
}).on('message', function message(data, flags) {
if (program.hexOut) data = toHex(data);
wsConsole.print('< ' + data, Console.Colors.Blue);
});
}).on('error', function servererrror(error) {
Expand Down Expand Up @@ -195,6 +229,7 @@ if (program.listen && program.connect) {
ws.on('open', function open() {
wsConsole.print('connected (press CTRL+C to quit)', Console.Colors.Green);
wsConsole.on('line', function line(data) {
if (program.hexIn) data = fromHex(data);
ws.send(data, { mask: true });
wsConsole.prompt();
});
Expand All @@ -206,14 +241,15 @@ if (program.listen && program.connect) {
wsConsole.print('error: ' + code + (description ? ' ' + description : ''), Console.Colors.Yellow);
process.exit(-1);
}).on('message', function message(data, flags) {
if (program.hexOut) data = toHex(data);
wsConsole.print('< ' + data, Console.Colors.Blue);
});

wsConsole.on('close', function close() {
if (!ws) return;

try { ws.close(); }
catch(e) {}
catch(e) {}

process.exit();
});
Expand Down