= REST hello world example To try this example, you need GNU `make` and `git` in your PATH. To build and run the example, use the following command: [source,bash] $ make run Then point your browser to http://localhost:8080 == HTTP/1.1 example output Request HTML: [source,bash] ---- $ curl -i http://localhost:8080 HTTP/1.1 200 OK connection: keep-alive server: Cowboy date: Fri, 28 Sep 2012 04:15:52 GMT content-length: 136 content-type: text/html vary: Accept <html> <head> <meta charset="utf-8"> <title>REST Hello World!</title> </head> <body> <p>REST Hello World as HTML!</p> </body> </html> ---- Request JSON: [source,bash] ---- $ curl -i -H "Accept: application/json" http://localhost:8080 HTTP/1.1 200 OK connection: keep-alive server: Cowboy date: Fri, 28 Sep 2012 04:16:46 GMT content-length: 24 content-type: application/json vary: Accept {"rest": "Hello World!"} ---- Request plain text: [source,bash] ---- $ curl -i -H "Accept: text/plain" http://localhost:8080 HTTP/1.1 200 OK connection: keep-alive server: Cowboy date: Fri, 28 Sep 2012 04:18:35 GMT content-length: 25 content-type: text/plain vary: Accept REST Hello World as text! ---- Request a non acceptable content-type: [source,bash] ---- $ curl -i -H "Accept: text/css" http://localhost:8080 HTTP/1.1 406 Not Acceptable connection: keep-alive server: Cowboy date: Fri, 28 Sep 2012 04:18:51 GMT content-length: 0 ---- == HTTP/2 example output Request HTML: [source,bash] ---- $ nghttp -v 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) [ 0.000] send PRIORITY frame <length=5, flags=0x00, stream_id=7> (dep_stream_id=0, weight=1, exclusive=0) [ 0.000] send PRIORITY frame <length=5, flags=0x00, stream_id=9> (dep_stream_id=7, weight=1, exclusive=0) [ 0.000] send PRIORITY frame <length=5, flags=0x00, stream_id=11> (dep_stream_id=3, weight=1, exclusive=0) [ 0.000] send HEADERS frame <length=38, flags=0x25, stream_id=13> ; END_STREAM | END_HEADERS | PRIORITY (padlen=0, dep_stream_id=11, weight=16, exclusive=0) ; Open new stream :method: GET :path: / :scheme: http :authority: localhost:8080 accept: */* accept-encoding: gzip, deflate user-agent: nghttp2/1.7.1 [ 0.000] recv SETTINGS frame <length=0, flags=0x00, stream_id=0> (niv=0) [ 0.000] send SETTINGS frame <length=0, flags=0x01, stream_id=0> ; ACK (niv=0) [ 0.000] recv SETTINGS frame <length=0, flags=0x01, stream_id=0> ; ACK (niv=0) [ 0.001] recv (stream_id=13) :status: 200 [ 0.001] recv (stream_id=13) content-length: 136 [ 0.001] recv (stream_id=13) content-type: text/html [ 0.001] recv (stream_id=13) date: Thu, 09 Jun 2016 14:28:50 GMT [ 0.001] recv (stream_id=13) server: Cowboy [ 0.001] recv (stream_id=13) vary: accept [ 0.001] recv HEADERS frame <length=52, flags=0x04, stream_id=13> ; END_HEADERS (padlen=0) ; First response header <html> <head> <meta charset="utf-8"> <title>REST Hello World!</title> </head> <body> <p>REST Hello World as HTML!</p> </body> </html>[ 0.001] recv DATA frame <length=136, flags=0x01, stream_id=13> ; END_STREAM [ 0.001] send GOAWAY frame <length=8, flags=0x00, stream_id=0> (last_stream_id=0, error_code=NO_ERROR(0x00), opaque_data(0)=[]) ---- Request JSON: [source,bash] ---- $ nghttp -v -H "accept: application/json" 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) [ 0.000] send PRIORITY frame <length=5, flags=0x00, stream_id=7> (dep_stream_id=0, weight=1, exclusive=0) [ 0.000] 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=46, flags=0x25, stream_id=13> ; END_STREAM | END_HEADERS | PRIORITY (padlen=0, dep_stream_id=11, weight=16, exclusive=0) ; Open new stream :method: GET :path: / :scheme: http :authority: localhost:8080 accept: application/json accept-encoding: gzip, deflate user-agent: nghttp2/1.7.1 [ 0.001] recv SETTINGS frame <length=0, flags=0x00, stream_id=0> (niv=0) [ 0.001] send SETTINGS frame <length=0, flags=0x01, stream_id=0> ; ACK (niv=0) [ 0.001] recv SETTINGS frame <length=0, flags=0x01, stream_id=0> ; ACK (niv=0) [ 0.001] recv (stream_id=13) :status: 200 [ 0.001] recv (stream_id=13) content-length: 24 [ 0.001] recv (stream_id=13) content-type: application/json [ 0.001] recv (stream_id=13) date: Thu, 09 Jun 2016 14:29:00 GMT [ 0.001] recv (stream_id=13) server: Cowboy [ 0.001] recv (stream_id=13) vary: accept [ 0.001] recv HEADERS frame <length=55, flags=0x04, stream_id=13> ; END_HEADERS (padlen=0) ; First response header {"rest": "Hello World!"}[ 0.002] recv DATA frame <length=24, flags=0x01, stream_id=13> ; END_STREAM [ 0.002] send GOAWAY frame <length=8, flags=0x00, stream_id=0> (last_stream_id=0, error_code=NO_ERROR(0x00), opaque_data(0)=[]) ---- Request plain text: [source,bash] ---- $ nghttp -v -H "accept: text/plain" 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) [ 0.000] send PRIORITY frame <length=5, flags=0x00, stream_id=7> (dep_stream_id=0, weight=1, exclusive=0) [ 0.000] send PRIORITY frame <length=5, flags=0x00, stream_id=9> (dep_stream_id=7, weight=1, exclusive=0) [ 0.000] send PRIORITY frame <length=5, flags=0x00, stream_id=11> (dep_stream_id=3, weight=1, exclusive=0) [ 0.000] send HEADERS frame <length=42, flags=0x25, stream_id=13> ; END_STREAM | END_HEADERS | PRIORITY (padlen=0, dep_stream_id=11, weight=16, exclusive=0) ; Open new stream :method: GET :path: / :scheme: http :authority: localhost:8080 accept: text/plain accept-encoding: gzip, deflate user-agent: nghttp2/1.7.1 [ 0.000] recv SETTINGS frame <length=0, flags=0x00, stream_id=0> (niv=0) [ 0.000] send SETTINGS frame <length=0, flags=0x01, stream_id=0> ; ACK (niv=0) [ 0.000] recv SETTINGS frame <length=0, flags=0x01, stream_id=0> ; ACK (niv=0) [ 0.000] recv (stream_id=13) :status: 200 [ 0.000] recv (stream_id=13) content-length: 25 [ 0.000] recv (stream_id=13) content-type: text/plain [ 0.000] recv (stream_id=13) date: Thu, 09 Jun 2016 14:28:25 GMT [ 0.000] recv (stream_id=13) server: Cowboy [ 0.000] recv (stream_id=13) vary: accept [ 0.000] recv HEADERS frame <length=51, flags=0x04, stream_id=13> ; END_HEADERS (padlen=0) ; First response header REST Hello World as text![ 0.000] recv DATA frame <length=25, flags=0x01, stream_id=13> ; END_STREAM [ 0.000] send GOAWAY frame <length=8, flags=0x00, stream_id=0> (last_stream_id=0, error_code=NO_ERROR(0x00), opaque_data(0)=[]) ---- Request a non acceptable content-type: [source,bash] ---- $ nghttp -v -H "accept: text/css" 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) [ 0.000] send PRIORITY frame <length=5, flags=0x00, stream_id=7> (dep_stream_id=0, weight=1, exclusive=0) [ 0.000] send PRIORITY frame <length=5, flags=0x00, stream_id=9> (dep_stream_id=7, weight=1, exclusive=0) [ 0.000] send PRIORITY frame <length=5, flags=0x00, stream_id=11> (dep_stream_id=3, weight=1, exclusive=0) [ 0.000] send HEADERS frame <length=41, flags=0x25, stream_id=13> ; END_STREAM | END_HEADERS | PRIORITY (padlen=0, dep_stream_id=11, weight=16, exclusive=0) ; Open new stream :method: GET :path: / :scheme: http :authority: localhost:8080 accept: text/css accept-encoding: gzip, deflate user-agent: nghttp2/1.7.1 [ 0.007] recv SETTINGS frame <length=0, flags=0x00, stream_id=0> (niv=0) [ 0.007] recv SETTINGS frame <length=0, flags=0x01, stream_id=0> ; ACK (niv=0) [ 0.007] send SETTINGS frame <length=0, flags=0x01, stream_id=0> ; ACK (niv=0) [ 0.021] recv (stream_id=13) :status: 406 [ 0.021] recv (stream_id=13) content-length: 0 [ 0.021] recv (stream_id=13) date: Thu, 09 Jun 2016 14:29:15 GMT [ 0.021] recv (stream_id=13) server: Cowboy [ 0.021] recv HEADERS frame <length=39, flags=0x04, stream_id=13> ; END_HEADERS (padlen=0) ; First response header [ 0.021] recv DATA frame <length=0, flags=0x01, stream_id=13> ; END_STREAM [ 0.021] send GOAWAY frame <length=8, flags=0x00, stream_id=0> (last_stream_id=0, error_code=NO_ERROR(0x00), opaque_data(0)=[]) ----