Espressif ESP32-S2 User Manual

Chapter 2. API Reference
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* 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 = MIN(req->content_len, sizeof(content));
int ret = httpd_req_recv(req, content, recv_size);
if (ret <= 0) { /* 0 return value indicates connection closed */
/* Check if timeout occurred */
if (ret == HTTPD_SOCK_ERR_TIMEOUT) {
/* 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 ESP_FAIL;
}
/* Send a simple response */
const char resp[] = "URI POST Response";
httpd_resp_send(req, resp, HTTPD_RESP_USE_STRLEN);
return ESP_OK;
}
/* URI handler structure for GET /uri */
httpd_uri_t uri_get = {
.uri = "/uri",
.method = HTTP_GET,
.handler = get_handler,
.user_ctx = NULL
};
/* URI handler structure for POST /uri */
httpd_uri_t uri_post = {
.uri = "/uri",
.method = HTTP_POST,
.handler = post_handler,
.user_ctx = NULL
};
/* Function for starting the webserver */
httpd_handle_t start_webserver(void)
{
/* Generate default configuration */
httpd_config_t config = HTTPD_DEFAULT_CONFIG();
/* Empty handle to esp_http_server */
httpd_handle_t server = NULL;
/* Start the httpd server */
if (httpd_start(&server, &config) == ESP_OK) {
/* 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;
}
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Espressif ESP32-S2 Specifications

General

Brand	Espressif
Model	ESP32-S2
Category	Single board computers
Language	English