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75 lines
4.2 KiB
75 lines
4.2 KiB
4 months ago
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# lws minimal http client POST
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This example demonstrates a multipart POST to
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https://libwebsockets.org/testserver/formtest
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setting both a form variable and uploading a
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short file.
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The result of the POST form processing is captured
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and displayed in a hexdump.
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This is programmatically POSTing to the same
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form you can access at
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https://libwebsockets.org/testserver
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in the "POST" tab with file upload.
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By default the client action occurs using http/2 if
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your lws was built with `-DLWS_WITH_HTTP2=1`.
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## build
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```
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$ cmake . && make
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```
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## usage
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```
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$ ./lws-minimal-http-client-post
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[2018/04/03 13:13:10:7891] USER: LWS minimal http client - POST
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[2018/04/03 13:13:10:7905] NOTICE: Creating Vhost 'default' (serving disabled), 1 protocols, IPv6 on
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[2018/04/03 13:13:10:7984] NOTICE: created client ssl context for default
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[2018/04/03 13:13:12:8444] USER: LWS_CALLBACK_CLIENT_APPEND_HANDSHAKE_HEADER
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[2018/04/03 13:13:12:8444] USER: LWS_CALLBACK_CLIENT_HTTP_WRITEABLE
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[2018/04/03 13:13:12:8445] USER: LWS_CALLBACK_CLIENT_HTTP_WRITEABLE
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[2018/04/03 13:13:12:8445] USER: LWS_CALLBACK_CLIENT_HTTP_WRITEABLE
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[2018/04/03 13:13:13:1437] USER: LWS_CALLBACK_CLIENT_HTTP_WRITEABLE
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[2018/04/03 13:13:13:1440] USER: LWS_CALLBACK_CLIENT_HTTP_WRITEABLE
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[2018/04/03 13:13:13:1440] USER: RECEIVE_CLIENT_HTTP_READ: read 402
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[2018/04/03 13:13:13:1441] NOTICE:
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[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>
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[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
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[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)
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[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>
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[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
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[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>
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[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><
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[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</
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[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
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[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
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[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
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[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>
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[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><
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[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
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[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
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[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</
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[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>
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[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>
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[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><
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[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
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[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
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[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
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[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
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[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
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[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
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[2018/04/03 13:13:13:1442] NOTICE: 0190: 6C 3E l>
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[2018/04/03 13:13:13:1442] NOTICE:
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[2018/04/03 13:13:13:1442] USER: LWS_CALLBACK_COMPLETED_CLIENT_HTTP
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[2018/04/03 13:13:13:1455] USER: Completed
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```
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