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libwebsockets/minimal-examples/http-client/minimal-http-client-h2-rxflow
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.c type comparisons: fixes 2021-01-05 10:56:38 +00:00
README.md h2: LCCSCF_H2_MANUAL_RXFLOW and refactor txcr 2020-01-02 08:31:02 +00:00
warmcat.com.cer cmake: tls: wolfssl 2020-08-10 15:04:10 +01:00

lws minimal http client-h2-rxflow

The application reads from a server with tightly controlled and rate-limited receive flow control using h2 tx credit.

build

 $ cmake . && make

usage

Commandline option Meaning
-d Debug verbosity in decimal, eg, -d15
-l Connect to https://localhost:7681 and accept selfsigned cert
--server set server name to connect to
--path URL path to access on server
-k Apply tls option LCCSCF_ALLOW_INSECURE
-j Apply tls option LCCSCF_ALLOW_SELFSIGNED
-m Apply tls option LCCSCF_SKIP_SERVER_CERT_HOSTNAME_CHECK
-e Apply tls option LCCSCF_ALLOW_EXPIRED
-v Connection validity use 3s / 10s instead of default 5m / 5m10s
--nossl disable ssl connection
-f Indicate we will manually manage tx credit and set a new connection-specific initial tx credit

RX is constrained to 1024 bytes every 250ms

 $ ./lws-minimal-http-client-h2-rxflow  --server phys.org --path "/" -f 1024
[2019/12/26 13:32:59:6801] U: LWS minimal http client [-d<verbosity>] [-l] [--h1]
[2019/12/26 13:33:00:5087] N: system_notify_cb: manual peer tx credit 1024
[2019/12/26 13:33:01:7390] U: Connected to 72.251.236.55, http response: 200
[2019/12/26 13:33:01:7441] U: RECEIVE_CLIENT_HTTP_READ: read 1024
[2019/12/26 13:33:01:0855] U: RECEIVE_CLIENT_HTTP_READ: read 1024
[2019/12/26 13:33:02:3367] U: RECEIVE_CLIENT_HTTP_READ: read 1024
[2019/12/26 13:33:02:5858] U: RECEIVE_CLIENT_HTTP_READ: read 1024
[2019/12/26 13:33:02:8384] U: RECEIVE_CLIENT_HTTP_READ: read 1024
[2019/12/26 13:33:02:0886] U: RECEIVE_CLIENT_HTTP_READ: read 1024
...
[2019/12/26 13:33:46:1152] U: RECEIVE_CLIENT_HTTP_READ: read 1024
[2019/12/26 13:33:47:3650] U: RECEIVE_CLIENT_HTTP_READ: read 1024
[2019/12/26 13:33:47:6150] U: RECEIVE_CLIENT_HTTP_READ: read 1024
[2019/12/26 13:33:47:8666] U: RECEIVE_CLIENT_HTTP_READ: read 1024
[2019/12/26 13:33:47:1154] U: RECEIVE_CLIENT_HTTP_READ: read 1024
[2019/12/26 13:33:48:3656] U: RECEIVE_CLIENT_HTTP_READ: read 1024
[2019/12/26 13:33:48:6157] U: RECEIVE_CLIENT_HTTP_READ: read 380
[2019/12/26 13:33:48:6219] U: LWS_CALLBACK_COMPLETED_CLIENT_HTTP
[2019/12/26 13:33:48:7050] U: Completed: OK