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options.md

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Options

There is a dedicated setopt option for the application to control a WebSocket communication: CURLOPT_WS_OPTIONS.

This option sets a bitmask of flags to libcurl, but at the moment, there is only a single bit used.

Raw mode

By setting the CURLWS_RAW_MODE bit in the bitmask, libcurl delivers all WebSocket traffic raw to the write callback instead of parsing the WebSocket traffic itself. This raw mode is intended for applications that maybe implemented WebSocket handling already and want to just move over to use libcurl for the transfer and maintain its own WebSocket logic.

In raw mode, libcurl also does not handle any PING traffic automatically.