Testing `Expect: 100-continue` support in Node.js and HTTPie.

httpie-output

$ http -v PUT localhost:5100 Expect:100-continue foo=bar

PUT / HTTP/1.1
Accept-Encoding: identity, deflate, compress, gzip
Accept: application/json
User-Agent: HTTPie/0.2.5
Host: localhost:5100
Expect: 100-continue
Content-Type: application/json; charset=utf-8

{
    "foo": "bar"
}

HTTP/1.1 400 Bad Request
Date: Tue, 30 Jul 2013 20:57:22 GMT
Connection: close
Transfer-Encoding: chunked

Sorry bro.

server-output

$ coffee server

Listening on port 5100...

GOT EXPECT: { host: 'localhost:5100',
  'content-length': '14',
  'accept-encoding': 'identity, deflate, compress, gzip',
  'content-type': 'application/json; charset=utf-8',
  expect: '100-continue',
  accept: 'application/json',
  'user-agent': 'HTTPie/0.2.5' } null

CUTTING OFF!

Got req data: {"foo": "bar"}
Request finished.

WTF? Should have been cut off.

server.coffee

#
# Node.js server to test Expect: 100-continue requests.
#

http = require 'http'
server = http.createServer()

server.on 'checkContinue', (req, res) ->
    continued = Math.random() < 0.5

    readRequest 'GOT EXPECT:', req, ->
        if continued
            res.end 'Pleasure doing business.\n'
        else
            console.log 'WTF? Should have been cut off.\n'

    if continued
        console.log 'Letting continue...\n'
        res.writeContinue()
    else
        console.log 'CUTTING OFF!\n'
        res.writeHead 400
        res.end 'Sorry bro.\n'

server.on 'request', (req, res) ->
    readRequest 'Got request:', req, ->
        res.end 'Word.\n'

readRequest = (msg, req, cb) ->
    req.setEncoding 'utf8'
    console.log msg, req.headers, req.read()

    req.on 'data', (chunk) ->
        console.log 'Got req data:', chunk

    req.on 'end', (chunk) ->
        console.log 'Request finished.\n'
        cb?()

server.listen 5100
console.log 'Listening on port 5100...'