esp_http_server: Expose low level socket send/recv APIs
For some advanced use cases, the low level APIs may be useful.
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@ -1292,6 +1292,53 @@ static inline esp_err_t httpd_resp_send_500(httpd_req_t *r) {
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*/
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int httpd_send(httpd_req_t *r, const char *buf, size_t buf_len);
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/**
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* A low level API to send data on a given socket
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*
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* @note This API is not recommended to be used in any request handler.
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* Use this only for advanced use cases, wherein some asynchronous
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* data is to be sent over a socket.
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*
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* This internally calls the default send function, or the function registered by
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* httpd_sess_set_send_override().
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*
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* @param[in] hd server instance
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* @param[in] sockfd session socket file descriptor
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* @param[in] buf buffer with bytes to send
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* @param[in] buf_len data size
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* @param[in] flags flags for the send() function
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* @return
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* - Bytes : The number of bytes sent successfully
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* - HTTPD_SOCK_ERR_INVALID : Invalid arguments
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* - HTTPD_SOCK_ERR_TIMEOUT : Timeout/interrupted while calling socket send()
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* - HTTPD_SOCK_ERR_FAIL : Unrecoverable error while calling socket send()
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*/
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int httpd_socket_send(httpd_handle_t hd, int sockfd, const char *buf, size_t buf_len, int flags);
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/**
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* A low level API to receive data from a given socket
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*
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* @note This API is not recommended to be used in any request handler.
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* Use this only for advanced use cases, wherein some asynchronous
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* communication is required.
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*
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* This internally calls the default recv function, or the function registered by
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* httpd_sess_set_recv_override().
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*
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* @param[in] hd server instance
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* @param[in] sockfd session socket file descriptor
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* @param[in] buf buffer with bytes to send
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* @param[in] buf_len data size
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* @param[in] flags flags for the send() function
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* @return
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* - Bytes : The number of bytes received successfully
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* - 0 : Buffer length parameter is zero / connection closed by peer
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* - HTTPD_SOCK_ERR_INVALID : Invalid arguments
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* - HTTPD_SOCK_ERR_TIMEOUT : Timeout/interrupted while calling socket recv()
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* - HTTPD_SOCK_ERR_FAIL : Unrecoverable error while calling socket recv()
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*/
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int httpd_socket_recv(httpd_handle_t hd, int sockfd, char *buf, size_t buf_len, int flags);
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/** End of Request / Response
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* @}
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*/
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@ -599,3 +599,27 @@ int httpd_default_recv(httpd_handle_t hd, int sockfd, char *buf, size_t buf_len,
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}
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return ret;
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}
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int httpd_socket_send(httpd_handle_t hd, int sockfd, const char *buf, size_t buf_len, int flags)
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{
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struct sock_db *sess = httpd_sess_get(hd, sockfd);
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if (!sess) {
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return ESP_ERR_INVALID_ARG;
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}
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if (!sess->send_fn) {
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return ESP_ERR_INVALID_STATE;
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}
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return sess->send_fn(hd, sockfd, buf, buf_len, flags);
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}
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int httpd_socket_recv(httpd_handle_t hd, int sockfd, char *buf, size_t buf_len, int flags)
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{
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struct sock_db *sess = httpd_sess_get(hd, sockfd);
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if (!sess) {
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return ESP_ERR_INVALID_ARG;
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}
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if (!sess->recv_fn) {
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return ESP_ERR_INVALID_STATE;
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}
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return sess->recv_fn(hd, sockfd, buf, buf_len, flags);
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}
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