sacoo7 / socketcluster-client-c

C/ C++ client for socketcluster framework in node.js

C Socketcluster Client

Overview

This client is developed using libwebsockets and json-c library in C.

Libwebsockets is a lightweight pure C library built to use minimal CPU and memory resources, and provide fast throughput.It is a CMake based project that has been used in a variety of OS contexts including Linux (uclibc and glibc), ARM-based embedded boards, MBED3, MIPS / OpenWRT, Windows, Android, Apple iOS and even Tivo. It's used all over the place including The New York Times customer-facing servers and BMW. Architectural features like nonblockinng event loop, zero-copy for payload data and FSM-based protocol parsers make it ideal for realtime operation on resource-constrained devices.

Json-c is one of the most performant and easy-to-use JSON implementations in c. To use json-c objects in client follow tutorials on json-c.

More contributions are always welcome :)

More documentation coming soon..

socketcluster-client-c's Issues

Why should websocket be destroyed when getting LWS_CALLBACK_CLIENT_WRITEABLE?

When socket become writeable, runtime error rises because web client go to be destroyed..

The related code is in scclient.cpp,
if (writeable_flag)
destroy_flag = 1; <= raise problem
}
break;
case LWS_CALLBACK_CLIENT_WRITEABLE :{
// printf(KYEL"[Main Service] On writeable is called. send byebye message\n"RESET_);
websocket_write_back(wsi, (char *)"Byebye! See you later", -1);
writeable_flag = 1;

struct socket in scclient.c rather than in scclient.h

Any specific reason on why struct socket is defined in scclient.c rather than (ideally) in scclient.h?

Not able to establish SSL connection

Hello,
I am able to connect a server with ws protocol but not with wss.
i have ca_cer file.
Can you provide a sample or proper documentation on how can i make SSL connection.

Thankyou

[Request] Can you provide more detail document?

I tried to build the source in xcode but got no success.
There are many things to do be done before I can build the project, like to install libwebsockets and json-c, openssl.

Can you provide us a document with step to step guide how to run this project?
Thank you.

Bus error issue about socketcluster-client-C

I use socketcluster-client-C, after compiled the emitter.c and run it, but i got
some errors as follows:

kimatoMacBook-Pro-3% ./emitter
[2017/05/03 15:18:18:3930] NOTICE: Initial logging level 7
[2017/05/03 15:18:18:3931] NOTICE: Libwebsockets version: 2.2.0 [email protected]
[2017/05/03 15:18:18:3931] NOTICE: IPV6 not compiled in
[2017/05/03 15:18:18:3931] NOTICE: libev support not compiled in
[2017/05/03 15:18:18:3931] NOTICE: libuv support not compiled in
[2017/05/03 15:18:18:3931] NOTICE: Threads: 1 each 256 fds
[2017/05/03 15:18:18:3931] NOTICE: mem: platform fd map: 2048 bytes
[2017/05/03 15:18:18:3932] NOTICE: Compiled with OpenSSL support
[2017/05/03 15:18:18:3932] NOTICE: SSL disabled: no LWS_SERVER_OPTION_DO_SSL_GLOBAL_INIT
[2017/05/03 15:18:18:3932] NOTICE: Creating Vhost 'default' port -1, 2 protocols, IPv6 off
[2017/05/03 15:18:18:3932] NOTICE: mem: per-conn: 568 bytes + protocol rx buf
[2017/05/03 15:18:18:3932] NOTICE: canonical_hostname = kimatoMacBook-Pro-3.local
[Main] context created.
zsh: bus error ./emitter

Can you give me some suggestions, thanks!

ERR: SSL_new failed: error

[2018/02/14 13:52:54:1746] NOTICE: Initial logging level 7
[2018/02/14 13:52:54:1747] NOTICE: Libwebsockets version: 2.0.3 unknown-build-hash
[2018/02/14 13:52:54:1748] NOTICE: IPV6 not compiled in
[2018/02/14 13:52:54:1749] NOTICE: libev support compiled in but disabled
[2018/02/14 13:52:54:1749] NOTICE: libuv support compiled in but disabled
[2018/02/14 13:52:54:1757] NOTICE: Threads: 1 each 1024 fds
[2018/02/14 13:52:54:1758] NOTICE: mem: platform fd map: 4096 bytes
[2018/02/14 13:52:54:1760] NOTICE: Compiled with OpenSSL support
[2018/02/14 13:52:54:1761] NOTICE: SSL disabled: no LWS_SERVER_OPTION_DO_SSL_GLOBAL_INIT
[2018/02/14 13:52:54:1762] NOTICE: Creating Vhost 'default' port -1, 1 protocols
[2018/02/14 13:52:54:1763] NOTICE: mem: per-conn: 600 bytes + protocol rx buf
[2018/02/14 13:52:54:1765] NOTICE: canonical_hostname = UNIT2
[Main] context created.
[Main] wsi create success.
[2018/02/14 13:52:54:5897] NOTICE: lws_protocol_init
[2018/02/14 13:52:54:9032] ERR: SSL_new failed: error:00000001:lib(0):func(0):reason(1)
[2018/02/14 13:52:54:9034] ERR: *** 336306371 error:140BA0C3:lib(20):func(186):reason(195)
^C[2018/02/14 13:52:56:3943] NOTICE: lws_context_destroy