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libwebsockets/minimal-examples/http-client/minimal-http-client-h2-rxflow
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Andy Green 06662a64fa LE-root-cert-update 
warmcat.com and libwebsockets.org use Let's Encrypt certificates... LE
have changed their CA signing arrangements and after 2021-01-12 (the
point I renewed the LE server certs and received one signed using the
new arrangements) it's required to trust new root certs for the examples
to connect to warmcat.com and libwebsockets.org.

https://letsencrypt.org/2020/09/17/new-root-and-intermediates.html

This updates the in-tree CA copies, the remote policies on warmcat.com
have also been updated.

Just goes to show for real client infrastructure, you need to run your own
CA (that doesn't have to be trusted by anything outside the clients)
where you can control the CA lifetime.
2021-01-13 04:32:13 +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 LE-root-cert-update 2021-01-13 04:32:13 +00:00

README.md

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