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30 lines
1013 B
Markdown
30 lines
1013 B
Markdown
---
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title: "mg_connect_ws()"
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decl_name: "mg_connect_ws"
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symbol_kind: "func"
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signature: |
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struct mg_connection *mg_connect_ws(struct mg_mgr *mgr,
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MG_CB(mg_event_handler_t event_handler,
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void *user_data);
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---
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Helper function that creates an outbound WebSocket connection.
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`url` is a URL to connect to. It must be properly URL-encoded, e.g. have
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no spaces, etc. By default, `mg_connect_ws()` sends Connection and
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Host headers. `extra_headers` is an extra HTTP header to send, e.g.
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`"User-Agent: my-app\r\n"`.
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If `protocol` is not NULL, then a `Sec-WebSocket-Protocol` header is sent.
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Examples:
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```c
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nc1 = mg_connect_ws(mgr, ev_handler_1, "ws://echo.websocket.org", NULL,
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NULL);
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nc2 = mg_connect_ws(mgr, ev_handler_1, "wss://echo.websocket.org", NULL,
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NULL);
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nc3 = mg_connect_ws(mgr, ev_handler_1, "ws://api.cesanta.com",
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"clubby.cesanta.com", NULL);
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```
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