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libwebsockets/minimal-examples-lowlevel/secure-streams/minimal-secure-streams-binance/README.md

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lws minimal secure streams binance

This is a Secure Streams version of minimal-ws-client-binance.

"policy.json" contains all the information about endpoints, protocols and connection validation, tagged by streamtype name.

The example tries to load it from the cwd, it lives in ./minimal-examples/secure-streams/minimal-secure-streams-binance dir, so either run it from there, or copy the policy.json to your cwd. It's also possible to put the policy json in the code as a string and pass that at context creation time.

The secure stream object represents a nailed-up connection that outlives any single socket connection, and can manage reconnections / retries according to the policy to keep the connection nailed up automatically.

Secure Streams provides the same simplified communication api without any protocol dependencies.

build

Lws must have been built with LWS_ROLE_WS=1, LWS_WITH_SECURE_STREAMS=1, and LWS_WITHOUT_EXTENSIONS=0

 $ cmake . && make

Commandline Options

Option Meaning
-d Set logging verbosity

usage

$ ./bin/lws-minimal-ws-client-binance 
[2021/08/15 06:42:40:8409] U: LWS minimal Secure Streams binance client
[2021/08/15 06:42:40:8410] N: LWS: 4.2.99-v4.2.0-156-g8f352f65e8, NET CLI SRV H1 H2 WS SS-JSON-POL SSPROX ConMon FLTINJ IPV6-on
[2021/08/15 06:42:40:8410] N:  ++ [495958|wsi|0|pipe] (1)
[2021/08/15 06:42:40:8411] N:  ++ [495958|vh|0|netlink] (1)
[2021/08/15 06:42:40:8433] N:  ++ [495958|vh|1|digicert||-1] (2)
[2021/08/15 06:42:40:8471] N:  ++ [495958|wsiSScli|0|binance] (1)
[2021/08/15 06:42:40:8471] N: [495958|wsiSScli|0|binance]: lws_ss_check_next_state_ss: (unset) -> LWSSSCS_CREATING
[2021/08/15 06:42:40:8472] N: [495958|wsiSScli|0|binance]: lws_ss_check_next_state_ss: LWSSSCS_CREATING -> LWSSSCS_CONNECTING
[2021/08/15 06:42:40:8472] N:  ++ [495958|wsicli|0|WS/h1/fstream.binance.com/([495958|wsiSScli|0|binance])] (1)
[2021/08/15 06:42:41:8802] N: [495958|wsiSScli|0|binance]: lws_ss_check_next_state_ss: LWSSSCS_CONNECTING -> LWSSSCS_CONNECTED
[2021/08/15 06:42:42:8803] N: sul_hz_cb: price: min: 4669185¢, max: 4672159¢, avg: 4670061¢, (53 prices/s)
[2021/08/15 06:42:42:8803] N: sul_hz_cb: elatency: min: 131ms, max: 292ms, avg: 154ms, (53 msg/s)
[2021/08/15 06:42:43:8803] N: sul_hz_cb: price: min: 4669646¢, max: 4672159¢, avg: 4669953¢, (34 prices/s)
[2021/08/15 06:42:43:8803] N: sul_hz_cb: elatency: min: 130ms, max: 149ms, avg: 133ms, (34 msg/s)
[2021/08/15 06:42:44:8804] N: sul_hz_cb: price: min: 4669455¢, max: 4672159¢, avg: 4669904¢, (26 prices/s)
...