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libwebsockets/minimal-examples/http-client/minimal-http-client-post
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Andy Green f7149e90c2 cc0: align dedication to CC0 FAQ recommended format 
https://libwebsockets.org/pipermail/libwebsockets/2019-April/007937.html

thanks to Bruce Perens for noting it.

This doesn't change the intention or status of the CC0 files, they were
pure CC0 before (ie, public domain) and they are pure CC0 now.  It just
gets rid of the (C) part at the top of the dedication which may be read
to be a bit contradictory since the purpose is to make it public domain.
2019-05-02 09:29:01 +01:00
..
CMakeLists.txt refactor: most preparation for -DLWS_ROLE_H1=0 2018-04-27 19:16:50 +08:00
libwebsockets.org.cer minimal-http-client-post 2018-04-06 10:38:04 +08:00
minimal-http-client-post.c cc0: align dedication to CC0 FAQ recommended format 2019-05-02 09:29:01 +01:00
README.md minimal-http-client-post 2018-04-06 10:38:04 +08:00
selftest.sh client: support pipelining / h2 multi for POST 2018-04-27 07:25:45 +08:00

README.md

lws minimal http client POST

This example demonstrates a multipart POST to

https://libwebsockets.org/testserver/formtest

setting both a form variable and uploading a short file.

The result of the POST form processing is captured and displayed in a hexdump.

This is programmatically POSTing to the same form you can access at

https://libwebsockets.org/testserver

in the "POST" tab with file upload.

By default the client action occurs using http/2 if your lws was built with -DLWS_WITH_HTTP2=1.

build

 $ cmake . && make

usage

 $ ./lws-minimal-http-client-post
[2018/04/03 13:13:10:7891] USER: LWS minimal http client - POST
[2018/04/03 13:13:10:7905] NOTICE: Creating Vhost 'default' (serving disabled), 1 protocols, IPv6 on
[2018/04/03 13:13:10:7984] NOTICE: created client ssl context for default
[2018/04/03 13:13:12:8444] USER: LWS_CALLBACK_CLIENT_APPEND_HANDSHAKE_HEADER
[2018/04/03 13:13:12:8444] USER: LWS_CALLBACK_CLIENT_HTTP_WRITEABLE
[2018/04/03 13:13:12:8445] USER: LWS_CALLBACK_CLIENT_HTTP_WRITEABLE
[2018/04/03 13:13:12:8445] USER: LWS_CALLBACK_CLIENT_HTTP_WRITEABLE
[2018/04/03 13:13:13:1437] USER: LWS_CALLBACK_CLIENT_HTTP_WRITEABLE
[2018/04/03 13:13:13:1440] USER: LWS_CALLBACK_CLIENT_HTTP_WRITEABLE
[2018/04/03 13:13:13:1440] USER: RECEIVE_CLIENT_HTTP_READ: read 402
[2018/04/03 13:13:13:1441] NOTICE: 
[2018/04/03 13:13:13:1441] NOTICE: 0000: 3C 68 74 6D 6C 3E 3C 62 6F 64 79 3E 3C 68 31 3E    <html><body><h1>
[2018/04/03 13:13:13:1441] NOTICE: 0010: 46 6F 72 6D 20 72 65 73 75 6C 74 73 20 28 61 66    Form results (af
[2018/04/03 13:13:13:1441] NOTICE: 0020: 74 65 72 20 75 72 6C 64 65 63 6F 64 69 6E 67 29    ter urldecoding)
[2018/04/03 13:13:13:1441] NOTICE: 0030: 3C 2F 68 31 3E 3C 74 61 62 6C 65 3E 3C 74 72 3E    </h1><table><tr>
[2018/04/03 13:13:13:1441] NOTICE: 0040: 3C 74 64 3E 4E 61 6D 65 3C 2F 74 64 3E 3C 74 64    <td>Name</td><td
[2018/04/03 13:13:13:1441] NOTICE: 0050: 3E 4C 65 6E 67 74 68 3C 2F 74 64 3E 3C 74 64 3E    >Length</td><td>
[2018/04/03 13:13:13:1441] NOTICE: 0060: 56 61 6C 75 65 3C 2F 74 64 3E 3C 2F 74 72 3E 3C    Value</td></tr><
[2018/04/03 13:13:13:1441] NOTICE: 0070: 74 72 3E 3C 74 64 3E 3C 62 3E 74 65 78 74 3C 2F    tr><td><b>text</
[2018/04/03 13:13:13:1441] NOTICE: 0080: 62 3E 3C 2F 74 64 3E 3C 74 64 3E 31 33 3C 2F 74    b></td><td>13</t
[2018/04/03 13:13:13:1441] NOTICE: 0090: 64 3E 3C 74 64 3E 6D 79 20 74 65 78 74 20 66 69    d><td>my text fi
[2018/04/03 13:13:13:1441] NOTICE: 00A0: 65 6C 64 3C 2F 74 64 3E 3C 2F 74 72 3E 3C 74 72    eld</td></tr><tr
[2018/04/03 13:13:13:1441] NOTICE: 00B0: 3E 3C 74 64 3E 3C 62 3E 73 65 6E 64 3C 2F 62 3E    ><td><b>send</b>
[2018/04/03 13:13:13:1441] NOTICE: 00C0: 3C 2F 74 64 3E 3C 74 64 3E 30 3C 2F 74 64 3E 3C    </td><td>0</td><
[2018/04/03 13:13:13:1442] NOTICE: 00D0: 74 64 3E 4E 55 4C 4C 3C 2F 74 64 3E 3C 2F 74 72    td>NULL</td></tr
[2018/04/03 13:13:13:1442] NOTICE: 00E0: 3E 3C 74 72 3E 3C 74 64 3E 3C 62 3E 66 69 6C 65    ><tr><td><b>file
[2018/04/03 13:13:13:1442] NOTICE: 00F0: 3C 2F 62 3E 3C 2F 74 64 3E 3C 74 64 3E 30 3C 2F    </b></td><td>0</
[2018/04/03 13:13:13:1442] NOTICE: 0100: 74 64 3E 3C 74 64 3E 4E 55 4C 4C 3C 2F 74 64 3E    td><td>NULL</td>
[2018/04/03 13:13:13:1442] NOTICE: 0110: 3C 2F 74 72 3E 3C 74 72 3E 3C 74 64 3E 3C 62 3E    </tr><tr><td><b>
[2018/04/03 13:13:13:1442] NOTICE: 0120: 75 70 6C 6F 61 64 3C 2F 62 3E 3C 2F 74 64 3E 3C    upload</b></td><
[2018/04/03 13:13:13:1442] NOTICE: 0130: 74 64 3E 30 3C 2F 74 64 3E 3C 74 64 3E 4E 55 4C    td>0</td><td>NUL
[2018/04/03 13:13:13:1442] NOTICE: 0140: 4C 3C 2F 74 64 3E 3C 2F 74 72 3E 3C 2F 74 61 62    L</td></tr></tab
[2018/04/03 13:13:13:1442] NOTICE: 0150: 6C 65 3E 3C 62 72 3E 3C 62 3E 66 69 6C 65 6E 61    le><br><b>filena
[2018/04/03 13:13:13:1442] NOTICE: 0160: 6D 65 3A 3C 2F 62 3E 20 6D 79 66 69 6C 65 2E 74    me:</b> myfile.t
[2018/04/03 13:13:13:1442] NOTICE: 0170: 78 74 2C 20 3C 62 3E 6C 65 6E 67 74 68 3C 2F 62    xt, <b>length</b
[2018/04/03 13:13:13:1442] NOTICE: 0180: 3E 20 34 34 3C 2F 62 6F 64 79 3E 3C 2F 68 74 6D    > 44</body></htm
[2018/04/03 13:13:13:1442] NOTICE: 0190: 6C 3E                                              l>              
[2018/04/03 13:13:13:1442] NOTICE: 
[2018/04/03 13:13:13:1442] USER: LWS_CALLBACK_COMPLETED_CLIENT_HTTP
[2018/04/03 13:13:13:1455] USER: Completed