Espressif ESP32-S2 Programming Manual page 583

Chapter 2. API Reference
* In case of string data, null termination will be absent, and
* content length would give length of string */
char content[100];
/* Truncate if content length larger than the buffer */
size_t recv_size
int ret = httpd_req_recv(req, content, recv_size);
if (ret <=
/* Check if timeout occurred */
if (ret
/* In case of timeout one can choose to retry calling
* httpd_req_recv(), but to keep it simple, here we
* respond with an HTTP 408 (Request Timeout) error */
httpd_resp_send_408(req);
}
/* In case of error, returning ESP_FAIL will
* ensure that the underlying socket is closed */
return
}
/* Send a simple response */
const char
httpd_resp_send(req, resp, HTTPD_RESP_USE_STRLEN);
return ESP_OK;
}
/* URI handler structure for GET /uri */
httpd_uri_t uri_get
.uri =
.method =
.handler =
.user_ctx =
};
/* URI handler structure for POST /uri */
httpd_uri_t uri_post
.uri =
.method =
.handler =
.user_ctx =
};
/* Function for starting the webserver */
httpd_handle_t start_webserver(void)
{
/* Generate default configuration */
httpd_config_t config
/* Empty handle to esp_http_server */
httpd_handle_t server
/* Start the httpd server */
if (httpd_start(&server, &config)
/* Register URI handlers */
httpd_register_uri_handler(server, &uri_get);
httpd_register_uri_handler(server, &uri_post);
}
/* If server failed to start, handle will be NULL */
return server;
}
Espressif Systems
= MIN(req->content_len, sizeof(content));
0) { /* 0 return value indicates connection closed */
== HTTPD_SOCK_ERR_TIMEOUT) {
ESP_FAIL;
resp[] = "URI POST Response";
= {
"/uri",
HTTP_GET,
get_handler,
NULL
= {
"/uri",
HTTP_POST,
post_handler,
NULL
= HTTPD_DEFAULT_CONFIG();
= NULL;
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== ESP_OK) {
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