Hello,
So I'm porting over my janky little HTTP server library I home brewed. It fully functions with IOS captive portal and when I try to port that code to the HTTPD server it does not function exactly as it should. It does about 95% like it should but then just keeps reloading the page over and over.
I need some way to see what HTTP header the device is sending to the ESP32 so I can diag. I looked through the API and can not find anything that lets me print out the RAW http header. In my home brew code I could print out the complete header or contents depending on what I wanted. I see there is code for getting the contents and putting them into a buffer to read. Though I see nothing that does this for the Header.
Thanks all!
Does HTTPD offer anyway to see the RAW header?
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- Posts: 20
- Joined: Wed Nov 10, 2021 7:13 pm
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- Posts: 20
- Joined: Wed Nov 10, 2021 7:13 pm
Re: Does HTTPD offer anyway to see the RAW header?
I found a solution though, I think it is very weird you can not access this information directly through the API
I copied this structure from esp_httpd_priv.h which I could not figure out how to included in my main.c.
I then created this function. I call from any URI callback or http error handler
I copied this structure from esp_httpd_priv.h which I could not figure out how to included in my main.c.
Code: Select all
struct httpd_req_aux {
struct sock_db *sd; /*!< Pointer to socket database */
char scratch[1024 + 1]; /*!< Temporary buffer for our operations (1 byte extra for null termination) */
size_t remaining_len; /*!< Amount of data remaining to be fetched */
char *status; /*!< HTTP response's status code */
char *content_type; /*!< HTTP response's content type */
bool first_chunk_sent; /*!< Used to indicate if first chunk sent */
unsigned req_hdrs_count; /*!< Count of total headers in request packet */
unsigned resp_hdrs_count; /*!< Count of additional headers in response packet */
struct resp_hdr {
const char *field;
const char *value;
} *resp_hdrs; /*!< Additional headers in response packet */
struct http_parser_url url_parse_res; /*!< URL parsing result, used for retrieving URL elements */
#ifdef CONFIG_HTTPD_WS_SUPPORT
bool ws_handshake_detect; /*!< WebSocket handshake detection flag */
httpd_ws_type_t ws_type; /*!< WebSocket frame type */
bool ws_final; /*!< WebSocket FIN bit (final frame or not) */
uint8_t mask_key[4]; /*!< WebSocket mask key for this payload */
#endif
};
Code: Select all
esp_err_t httpd_req_print_header(httpd_req_t *r){
struct httpd_req_aux *ra = r->aux;
const char *hdr_ptr = ra->scratch;
const char *val_ptr = NULL;
printf("Header Count: %u\n", ra->req_hdrs_count);
puts("---HEADER---");
uint16_t count = ra->req_hdrs_count;
while (count--)
{
if(count){
val_ptr = hdr_ptr;
hdr_ptr = 1 + strchr(hdr_ptr, '\0');
while (*hdr_ptr == '\0') {
hdr_ptr++;
}
printf("%s\n", val_ptr);
}
}
puts("---END HEADER---");
return ESP_OK;
}
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