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libwebsockets/minimal-examples/http-client/minimal-http-client-custom-headers
Andy Green c9731c5f17 type comparisons: fixes
This is a huge patch that should be a global NOP.

For unix type platforms it enables -Wconversion to issue warnings (-> error)
for all automatic casts that seem less than ideal but are normally concealed
by the toolchain.

This is things like passing an int to a size_t argument.  Once enabled, I
went through all args on my default build (which build most things) and
tried to make the removed default cast explicit.

With that approach it neither change nor bloat the code, since it compiles
to whatever it was doing before, just with the casts made explicit... in a
few cases I changed some length args from int to size_t but largely left
the causes alone.

From now on, new code that is relying on less than ideal casting
will complain and nudge me to improve it by warnings.
2021-01-05 10:56:38 +00:00
..
CMakeLists.txt cmake: latest cmake shows dep warnings for scripts < 2.8.12 2020-12-06 19:44:54 +00:00
minimal-http-client-custom-headers.c type comparisons: fixes 2021-01-05 10:56:38 +00:00
README.md minimal-http-client-custom-headers 2019-03-12 11:57:43 +08:00
warmcat.com.cer cmake: tls: wolfssl 2020-08-10 15:04:10 +01:00

lws minimal http client custom headers

This http client application shows how to send and receive custom headers.

This currently only works on http 1, so the app forces that even if h2 enables.

build

 $ cmake . && make

usage

Commandline option Meaning
-d Debug verbosity in decimal, eg, -d15
-l Connect to https://localhost:7681 and accept selfsigned cert
-n no TLS

The app looks for a custom header "test-custom-header" sent by warmcat.com.

 $ ./lws-minimal-http-client-custom-headers
[2019/03/11 05:46:45:7582] USER: LWS minimal http client Custom Headers [-d<verbosity>] [-l] [--h1]
[2019/03/11 05:46:45:7671] NOTICE: created client ssl context for default
[2019/03/11 05:46:46:7812] USER: Connected with server response: 200
[2019/03/11 05:46:46:7812] NOTICE: callback_http: custom header: 'hello'
[2019/03/11 05:46:46:7814] USER: RECEIVE_CLIENT_HTTP_READ: read 1024
...

You can use the -n and -l to make this test app connect to localhost:7681 over http, and confirm the "dnt:1" header was sent either by tcpdump or by running the test server on :7681 with -d1151

[2019/03/11 05:48:53:6806] PARSER: WSI_TOKEN_NAME_PART 'd' 0x64 (role=0x20000000) wsi->lextable_pos=0
[2019/03/11 05:48:53:6807] PARSER: WSI_TOKEN_NAME_PART 'n' 0x6E (role=0x20000000) wsi->lextable_pos=567
[2019/03/11 05:48:53:6807] PARSER: WSI_TOKEN_NAME_PART 't' 0x74 (role=0x20000000) wsi->lextable_pos=-1
[2019/03/11 05:48:53:6807] PARSER: WSI_TOKEN_NAME_PART ' ' 0x20 (role=0x20000000) wsi->lextable_pos=-1
[2019/03/11 05:48:53:6807] PARSER: WSI_TOKEN_NAME_PART '1' 0x31 (role=0x20000000) wsi->lextable_pos=-1
' 0x0D (role=0x20000000) wsi->lextable_pos=-1NAME_PART '
[2019/03/11 05:48:53:6807] PARSER: WSI_TOKEN_NAME_PART '