mongoose/docs/c-api/json-rpc.h/mg_rpc_create_reply.md

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---
title: "mg_rpc_create_reply()"
decl_name: "mg_rpc_create_reply"
symbol_kind: "func"
signature: |
int mg_rpc_create_reply(char *buf, int len, const struct mg_rpc_request *req,
const char *result_fmt, ...);
---
Create JSON-RPC reply in a given buffer.
Return length of the reply, which
can be larger then `len` that indicates an overflow.
`result_fmt` format string should conform to `json_emit()` API,
see https://github.com/cesanta/frozen