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#include <stdlib.h>
#include <stdbool.h>
#include <esp_log.h>
#include <esp_system.h>
#include <esp_http_server.h>
#include "esp_check.h"
#include "tests.h"
static const char *TAG = "TESTS";
static int pre_start_mem, post_stop_mem;
struct async_resp_arg {
httpd_handle_t hd;
int fd;
};
/********************* Basic Handlers Start *******************/
static esp_err_t hello_get_handler(httpd_req_t *req)
{
#define STR "Hello World!"
ESP_LOGI(TAG, "Free Stack for server task: '%d'", uxTaskGetStackHighWaterMark(NULL));
httpd_resp_send(req, STR, HTTPD_RESP_USE_STRLEN);
return ESP_OK;
#undef STR
}
/* This handler is intended to check what happens in case of empty values of headers.
* Here `Header2` is an empty header and `Header1` and `Header3` will have `Value1`
* and `Value3` in them. */
static esp_err_t test_header_get_handler(httpd_req_t *req)
{
httpd_resp_set_type(req, HTTPD_TYPE_TEXT);
int buf_len;
char *buf;
buf_len = httpd_req_get_hdr_value_len(req, "Header1");
if (buf_len > 0) {
buf = malloc(++buf_len);
if (!buf) {
ESP_LOGE(TAG, "Failed to allocate memory of %d bytes!", buf_len);
httpd_resp_send_err(req, HTTPD_500_INTERNAL_SERVER_ERROR, "Memory allocation failed");
return ESP_ERR_NO_MEM;
}
/* Copy null terminated value string into buffer */
if (httpd_req_get_hdr_value_str(req, "Header1", buf, buf_len) == ESP_OK) {
ESP_LOGI(TAG, "Header1 content: %s", buf);
if (strcmp("Value1", buf) != 0) {
httpd_resp_send_err(req, HTTPD_400_BAD_REQUEST, "Wrong value of Header1 received");
free(buf);
return ESP_ERR_INVALID_ARG;
} else {
ESP_LOGI(TAG, "Expected value and received value matched for Header1");
}
} else {
ESP_LOGE(TAG, "Error in getting value of Header1");
httpd_resp_send_err(req, HTTPD_400_BAD_REQUEST, "Error in getting value of Header1");
free(buf);
return ESP_FAIL;
}
free(buf);
} else {
ESP_LOGE(TAG, "Header1 not found");
httpd_resp_send_err(req, HTTPD_400_BAD_REQUEST, "Header1 not found");
return ESP_ERR_NOT_FOUND;
}
buf_len = httpd_req_get_hdr_value_len(req, "Header3");
if (buf_len > 0) {
buf = malloc(++buf_len);
if (!buf) {
ESP_LOGE(TAG, "Failed to allocate memory of %d bytes!", buf_len);
httpd_resp_send_err(req, HTTPD_500_INTERNAL_SERVER_ERROR, "Memory allocation failed");
return ESP_ERR_NO_MEM;
}
/* Copy null terminated value string into buffer */
if (httpd_req_get_hdr_value_str(req, "Header3", buf, buf_len) == ESP_OK) {
ESP_LOGI(TAG, "Header3 content: %s", buf);
if (strcmp("Value3", buf) != 0) {
httpd_resp_send_err(req, HTTPD_400_BAD_REQUEST, "Wrong value of Header3 received");
free(buf);
return ESP_ERR_INVALID_ARG;
} else {
ESP_LOGI(TAG, "Expected value and received value matched for Header3");
}
} else {
ESP_LOGE(TAG, "Error in getting value of Header3");
httpd_resp_send_err(req, HTTPD_400_BAD_REQUEST, "Error in getting value of Header3");
free(buf);
return ESP_FAIL;
}
free(buf);
} else {
ESP_LOGE(TAG, "Header3 not found");
httpd_resp_send_err(req, HTTPD_400_BAD_REQUEST, "Header3 not found");
return ESP_ERR_NOT_FOUND;
}
buf_len = httpd_req_get_hdr_value_len(req, "Header2");
buf = malloc(++buf_len);
if (!buf) {
ESP_LOGE(TAG, "Failed to allocate memory of %d bytes!", buf_len);
httpd_resp_send_err(req, HTTPD_500_INTERNAL_SERVER_ERROR, "Memory allocation failed");
return ESP_ERR_NO_MEM;
}
if (httpd_req_get_hdr_value_str(req, "Header2", buf, buf_len) == ESP_OK) {
ESP_LOGI(TAG, "Header2 content: %s", buf);
httpd_resp_send(req, buf, HTTPD_RESP_USE_STRLEN);
} else {
ESP_LOGE(TAG, "Header2 not found");
httpd_resp_send_err(req, HTTPD_400_BAD_REQUEST, "Header2 not found");
return ESP_FAIL;
}
return ESP_OK;
}
static esp_err_t hello_type_get_handler(httpd_req_t *req)
{
#define STR "Hello World!"
httpd_resp_set_type(req, HTTPD_TYPE_TEXT);
httpd_resp_send(req, STR, HTTPD_RESP_USE_STRLEN);
return ESP_OK;
#undef STR
}
static esp_err_t hello_status_get_handler(httpd_req_t *req)
{
#define STR "Hello World!"
httpd_resp_set_status(req, HTTPD_500);
httpd_resp_send(req, STR, HTTPD_RESP_USE_STRLEN);
return ESP_OK;
#undef STR
}
static esp_err_t echo_post_handler(httpd_req_t *req)
{
ESP_LOGI(TAG, "/echo handler read content length %d", req->content_len);
char* buf = malloc(req->content_len + 1);
size_t off = 0;
int ret;
if (!buf) {
ESP_LOGE(TAG, "Failed to allocate memory of %d bytes!", req->content_len + 1);
httpd_resp_send_500(req);
return ESP_FAIL;
}
while (off < req->content_len) {
/* Read data received in the request */
ret = httpd_req_recv(req, buf + off, req->content_len - off);
if (ret <= 0) {
if (ret == HTTPD_SOCK_ERR_TIMEOUT) {
httpd_resp_send_408(req);
}
free (buf);
return ESP_FAIL;
}
off += ret;
ESP_LOGI(TAG, "/echo handler recv length %d", ret);
}
buf[off] = '\0';
if (req->content_len < 128) {
ESP_LOGI(TAG, "/echo handler read %s", buf);
}
/* Search for Custom header field */
char* req_hdr = 0;
size_t hdr_len = httpd_req_get_hdr_value_len(req, "Custom");
if (hdr_len) {
/* Read Custom header value */
req_hdr = malloc(hdr_len + 1);
if (!req_hdr) {
ESP_LOGE(TAG, "Failed to allocate memory of %d bytes!", hdr_len + 1);
httpd_resp_send_500(req);
return ESP_FAIL;
}
httpd_req_get_hdr_value_str(req, "Custom", req_hdr, hdr_len + 1);
/* Set as additional header for response packet */
httpd_resp_set_hdr(req, "Custom", req_hdr);
}
httpd_resp_send(req, buf, req->content_len);
free (req_hdr);
free (buf);
return ESP_OK;
}
static void adder_free_func(void *ctx)
{
ESP_LOGI(TAG, "Custom Free Context function called");
free(ctx);
}
/* Create a context, keep incrementing value in the context, by whatever was
* received. Return the result
*/
static esp_err_t adder_post_handler(httpd_req_t *req)
{
char buf[10];
char outbuf[50];
int ret;
/* Read data received in the request */
ret = httpd_req_recv(req, buf, sizeof(buf));
if (ret <= 0) {
if (ret == HTTPD_SOCK_ERR_TIMEOUT) {
httpd_resp_send_408(req);
}
return ESP_FAIL;
}
buf[ret] = '\0';
int val = atoi(buf);
ESP_LOGI(TAG, "/adder handler read %d", val);
if (! req->sess_ctx) {
ESP_LOGI(TAG, "/adder allocating new session");
req->sess_ctx = malloc(sizeof(int));
ESP_RETURN_ON_FALSE(req->sess_ctx, ESP_ERR_NO_MEM, TAG, "Failed to allocate sess_ctx");
req->free_ctx = adder_free_func;
*(int *)req->sess_ctx = 0;
}
int *adder = (int *)req->sess_ctx;
*adder += val;
snprintf(outbuf, sizeof(outbuf),"%d", *adder);
httpd_resp_send(req, outbuf, HTTPD_RESP_USE_STRLEN);
return ESP_OK;
}
static esp_err_t leftover_data_post_handler(httpd_req_t *req)
{
/* Only echo the first 10 bytes of the request, leaving the rest of the
* request data as is.
*/
char buf[11];
int ret;
/* Read data received in the request */
ret = httpd_req_recv(req, buf, sizeof(buf) - 1);
if (ret <= 0) {
if (ret == HTTPD_SOCK_ERR_TIMEOUT) {
httpd_resp_send_408(req);
}
return ESP_FAIL;
}
buf[ret] = '\0';
ESP_LOGI(TAG, "leftover data handler read %s", buf);
httpd_resp_send(req, buf, HTTPD_RESP_USE_STRLEN);
return ESP_OK;
}
static void generate_async_resp(void *arg)
{
char buf[250];
struct async_resp_arg *resp_arg = (struct async_resp_arg *)arg;
httpd_handle_t hd = resp_arg->hd;
int fd = resp_arg->fd;
#define HTTPD_HDR_STR "HTTP/1.1 200 OK\r\n" \
"Content-Type: text/html\r\n" \
"Content-Length: %d\r\n"
#define STR "Hello Double World!"
ESP_LOGI(TAG, "Executing queued work fd : %d", fd);
snprintf(buf, sizeof(buf), HTTPD_HDR_STR,
strlen(STR));
httpd_socket_send(hd, fd, buf, strlen(buf), 0);
/* Space for sending additional headers based on set_header */
httpd_socket_send(hd, fd, "\r\n", strlen("\r\n"), 0);
httpd_socket_send(hd, fd, STR, strlen(STR), 0);
#undef STR
free(arg);
}
static esp_err_t async_get_handler(httpd_req_t *req)
{
#define STR "Hello World!"
httpd_resp_send(req, STR, HTTPD_RESP_USE_STRLEN);
/* Also register a HTTPD Work which sends the same data on the same
* socket again
*/
struct async_resp_arg *resp_arg = malloc(sizeof(struct async_resp_arg));
ESP_RETURN_ON_FALSE(resp_arg, ESP_ERR_NO_MEM, TAG, "Failed to allocate resp_arg");
resp_arg->hd = req->handle;
resp_arg->fd = httpd_req_to_sockfd(req);
if (resp_arg->fd < 0) {
return ESP_FAIL;
}
ESP_LOGI(TAG, "Queuing work fd : %d", resp_arg->fd);
httpd_queue_work(req->handle, generate_async_resp, resp_arg);
return ESP_OK;
#undef STR
}
static const httpd_uri_t basic_handlers[] = {
{ .uri = "/hello/type_html",
.method = HTTP_GET,
.handler = hello_type_get_handler,
.user_ctx = NULL,
},
{ .uri = "/test_header",
.method = HTTP_GET,
.handler = test_header_get_handler,
.user_ctx = NULL,
},
{ .uri = "/hello",
.method = HTTP_GET,
.handler = hello_get_handler,
.user_ctx = NULL,
},
{ .uri = "/hello/status_500",
.method = HTTP_GET,
.handler = hello_status_get_handler,
.user_ctx = NULL,
},
{ .uri = "/echo",
.method = HTTP_POST,
.handler = echo_post_handler,
.user_ctx = NULL,
},
{ .uri = "/echo",
.method = HTTP_PUT,
.handler = echo_post_handler,
.user_ctx = NULL,
},
{ .uri = "/leftover_data",
.method = HTTP_POST,
.handler = leftover_data_post_handler,
.user_ctx = NULL,
},
{ .uri = "/adder",
.method = HTTP_POST,
.handler = adder_post_handler,
.user_ctx = NULL,
},
{ .uri = "/async_data",
.method = HTTP_GET,
.handler = async_get_handler,
.user_ctx = NULL,
}
};
static const int basic_handlers_no = sizeof(basic_handlers)/sizeof(httpd_uri_t);
static void register_basic_handlers(httpd_handle_t hd)
{
int i;
ESP_LOGI(TAG, "Registering basic handlers");
ESP_LOGI(TAG, "No of handlers = %d", basic_handlers_no);
for (i = 0; i < basic_handlers_no; i++) {
if (httpd_register_uri_handler(hd, &basic_handlers[i]) != ESP_OK) {
ESP_LOGW(TAG, "register uri failed for %d", i);
return;
}
}
ESP_LOGI(TAG, "Success");
}
static httpd_handle_t test_httpd_start(void)
{
pre_start_mem = esp_get_free_heap_size();
httpd_handle_t hd;
httpd_config_t config = HTTPD_DEFAULT_CONFIG();
/* Modify this setting to match the number of test URI handlers */
config.max_uri_handlers = 9;
config.server_port = 1234;
/* This check should be a part of http_server */
config.max_open_sockets = (CONFIG_LWIP_MAX_SOCKETS - 3);
if (httpd_start(&hd, &config) == ESP_OK) {
ESP_LOGI(TAG, "Started HTTP server on port: '%d'", config.server_port);
ESP_LOGI(TAG, "Max URI handlers: '%d'", config.max_uri_handlers);
ESP_LOGI(TAG, "Max Open Sessions: '%d'", config.max_open_sockets);
ESP_LOGI(TAG, "Max Header Length: '%d'", HTTPD_MAX_REQ_HDR_LEN);
ESP_LOGI(TAG, "Max URI Length: '%d'", HTTPD_MAX_URI_LEN);
ESP_LOGI(TAG, "Max Stack Size: '%d'", config.stack_size);
return hd;
}
return NULL;
}
static void test_httpd_stop(httpd_handle_t hd)
{
httpd_stop(hd);
post_stop_mem = esp_get_free_heap_size();
ESP_LOGI(TAG, "HTTPD Stop: Current free memory: %d", post_stop_mem);
}
httpd_handle_t start_tests(void)
{
httpd_handle_t hd = test_httpd_start();
if (hd) {
register_basic_handlers(hd);
}
return hd;
}
void stop_tests(httpd_handle_t hd)
{
ESP_LOGI(TAG, "Stopping httpd");
test_httpd_stop(hd);
}
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