POST parameter echo example

To try this example, you need GNU make and git in your PATH.

To build and run the example, use the following command:

$ make run

As this example echoes a POST parameter, it is a little more complex to test. Some browsers feature tools that allow you to perform one such request, or you can use the command line tool curl as we will demonstrate.

HTTP/1.1 example output

$ curl -i -d echo=echomeplz http://localhost:8080
HTTP/1.1 200 OK
connection: keep-alive
server: Cowboy
date: Fri, 28 Sep 2012 04:12:36 GMT
content-length: 9
content-type: text/plain; charset=utf-8

echomeplz

HTTP/2 example output

$ echo echo=echomeplz | nghttp -v -d - http://localhost:8080
[  0.000] Connected
[  0.000] send SETTINGS frame <length=12, flags=0x00, stream_id=0>
          (niv=2)
          [SETTINGS_MAX_CONCURRENT_STREAMS(0x03):100]
          [SETTINGS_INITIAL_WINDOW_SIZE(0x04):65535]
[  0.000] send PRIORITY frame <length=5, flags=0x00, stream_id=3>
          (dep_stream_id=0, weight=201, exclusive=0)
[  0.000] send PRIORITY frame <length=5, flags=0x00, stream_id=5>
          (dep_stream_id=0, weight=101, exclusive=0)
[  0.001] send PRIORITY frame <length=5, flags=0x00, stream_id=7>
          (dep_stream_id=0, weight=1, exclusive=0)
[  0.001] send PRIORITY frame <length=5, flags=0x00, stream_id=9>
          (dep_stream_id=7, weight=1, exclusive=0)
[  0.001] send PRIORITY frame <length=5, flags=0x00, stream_id=11>
          (dep_stream_id=3, weight=1, exclusive=0)
[  0.001] send HEADERS frame <length=43, flags=0x24, stream_id=13>
          ; END_HEADERS | PRIORITY
          (padlen=0, dep_stream_id=11, weight=16, exclusive=0)
          ; Open new stream
          :method: POST
          :path: /
          :scheme: http
          :authority: localhost:8080
          accept: */*
          accept-encoding: gzip, deflate
          user-agent: nghttp2/1.7.1
          content-length: 15
[  0.001] send DATA frame <length=15, flags=0x00, stream_id=13>
[  0.001] send DATA frame <length=0, flags=0x01, stream_id=13>
          ; END_STREAM
[  0.012] recv SETTINGS frame <length=0, flags=0x00, stream_id=0>
          (niv=0)
[  0.012] recv SETTINGS frame <length=0, flags=0x01, stream_id=0>
          ; ACK
          (niv=0)
[  0.012] send SETTINGS frame <length=0, flags=0x01, stream_id=0>
          ; ACK
          (niv=0)
[  0.020] recv (stream_id=13) :status: 200
[  0.020] recv (stream_id=13) content-length: 10
[  0.020] recv (stream_id=13) content-type: text/plain; charset=utf-8
[  0.020] recv (stream_id=13) date: Thu, 09 Jun 2016 09:19:35 GMT
[  0.020] recv (stream_id=13) server: Cowboy
[  0.020] recv HEADERS frame <length=57, flags=0x04, stream_id=13>
          ; END_HEADERS
          (padlen=0)
          ; First response header
echomeplz
[  0.020] recv DATA frame <length=10, flags=0x01, stream_id=13>
          ; END_STREAM
[  0.020] send GOAWAY frame <length=8, flags=0x00, stream_id=0>
          (last_stream_id=0, error_code=NO_ERROR(0x00), opaque_data(0)=[])