Format a stream to make it more human readable
npm install pretty-stream
If stream content is regular ascii (or unicode) it will just be forwarded. If it is binary it will be converted to hexadecimal notation. All stream lines are prefixed with the offset of line.
var pretty = require('pretty-stream')
var net = require('net')
// make a raw http request for a logo
var socket = net.connect(80, 'nodejs.org')
socket.write('GET /images/logo.png HTTP/1.1\r\n')
socket.write('Host: nodejs.org\r\n\r\n')
socket.end()
// just pipe it through the prettifier and out to stdout
socket.pipe(pretty()).pipe(process.stdout)Running the above will print something like
00000000 HTTP/1.1 200 OK
00000017 Server: nginx
00000032 Date: Wed, 17 Sep 2014 06:56:41 GMT
00000069 Content-Type: image/png
00000094 Content-Length: 5081
00000116 Last-Modified: Wed, 19 Feb 2014 02:46:11 GMT
00000162 Connection: keep-alive
00000186 Accept-Ranges: bytes
00000208
00000210 89 50 4e 47 0d 0a 1a 0a 00 00 00 0d 49 48 44 52 00 00 00 f5 00 00 00 42 08 06 00
00000237 00 00 8f 7e 90 a8 00 00 00 19 74 45 58 74 53 6f 66 74 77 61 72 65 00 41 64 6f 62
... many lines here ...
00005286 44 ae 42 60 82
If you do not want all the binary output set truncate:true
socket.pipe(pretty({truncate:true})).pipe(process.stdout)This will truncate the binary output producing something like
00000000 HTTP/1.1 200 OK
00000017 Server: nginx
00000032 Date: Wed, 17 Sep 2014 06:56:41 GMT
00000069 Content-Type: image/png
00000094 Content-Length: 5081
00000116 Last-Modified: Wed, 19 Feb 2014 02:46:11 GMT
00000162 Connection: keep-alive
00000186 Accept-Ranges: bytes
00000208
00000210 89 50 4e 47 0d 0a 1a 0a 00 00 (...)
... no more lines here ...
If the response only contains text output it will just be forwarded
var socket = net.connect(80, 'nodejs.org')
socket.write('GET / HTTP/1.1\r\n') // a text request
...
socket.pipe(pretty()).pipe(process.stdout)Which produces something like
00000000 HTTP/1.1 200 OK
00000017 Server: nginx
00000032 Date: Wed, 17 Sep 2014 07:03:27 GMT
00000069 Content-Type: text/html
00000094 Content-Length: 7643
00000116 Last-Modified: Tue, 16 Sep 2014 23:56:06 GMT
00000162 Connection: keep-alive
00000186 Accept-Ranges: bytes
00000208
00000210 <!doctype html>
00000226 <html lang="en">
00000243 <head>
... many lines here ...
Use the text, binary, and prefix option if you want to style the output
var chalk = require('chalk') // lets color things!
socket
.pipe(pretty({
text: function(data) {
return chalk.blue(data)
},
binary: function(data) {
return chalk.red(data)
},
prefix: function(data) {
return chalk.grey(data)
}
})
.pipe(process.stdout)text: false- all output is treated as binary (printed as hexadecimal)binary: false- all output is treated as textprefix: false- disable offset prefixingtruncate: true- truncate binary output
MIT