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#include "callback_http.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "../utils/strings.h"
#include "http_headers.h"
#include "request_method.h"
#include "response_code.h"
static const char* SEPS = " \n\r";
#define return_bad_request() { \
args->output = "HTTP/1.1 400 Bad Request"; \
args->output_size = 24; \
return; \
}
static void append_header(enum HttpHeader header, const char* value, const char** parts_array, size_t *ind);
void callback_http(callback_args* args) {
if (args->extra == NULL) {
printf("No HTTP callbacks were set!");
return;
}
http_callbacks *callbacks = args->extra;
/* Parse input request */
client_message in_message = {
.method = RM_UNKNOWN,
.url = NULL,
.version = NULL,
.headers = { 0 },
};
/** Request method **/
char* word = strtok(args->input, SEPS);
if (word == NULL) return_bad_request()
for (enum RequestMethod rm = RM_GET; rm < RM_UNKNOWN; rm++) {
if (streq(REQUEST_METHOD_NAME[rm], word)) {
in_message.method = rm;
break;
}
}
if (in_message.method == RM_UNKNOWN)
return_bad_request()
/** URL **/
word = strtok(NULL, SEPS);
if (word == NULL) return_bad_request()
in_message.url = word;
/** HTTP version **/
word = strtok(NULL, SEPS);
if (word == NULL || !streq("HTTP/1.1", word))
return_bad_request()
in_message.version = word;
/** Headers **/
word = strtok(NULL, ":\n\r");
while(word != NULL) {
enum HttpHeader he = 0;
while (he < HE_LENGTH) {
if (streq(HTTP_HEADER_NAME[he], word))
break;
++he;
}
word = strtok(NULL, "\n\r");
if (word == NULL) break;
if (he < HE_LENGTH) {
while (*word == ' ') ++word;
in_message.headers[he] = word;
}
word = strtok(NULL, ":\n\r");
}
/* Respond to request */
response_message out_message = {
.response_code = RC_500_INTERNAL_SERVER_ERRROR,
.headers = { 0 },
.body = NULL,
.body_size = 0,
.free_body = 0,
};
if (in_message.method < RM_UNKNOWN)
callbacks->all_callbacks[in_message.method](&in_message, &out_message);
else
printf("Unsupported method!");
const char* response[1024] = { 0 };
size_t rind = 0;
response[rind++] = "HTTP/1.1 ";
response[rind++] = RESPONSE_CODE_NAME[out_message.response_code];
response[rind++] = "\n";
for (enum HttpHeader he = 0; he < HE_LENGTH; he++) {
if (out_message.headers[he] != NULL)
append_header(he, out_message.headers[he], response, &rind);
}
response[rind++] = "\n";
if (out_message.body != NULL && out_message.body_size > 0)
response[rind++] = out_message.body;
args->output = concat_array(response, rind, &args->output_size);
args->free_output = 1;
if (out_message.free_body)
free(out_message.body);
}
static void append_header(enum HttpHeader header, const char* value, const char** parts_array, size_t *ind) {
parts_array[(*ind)++] = HTTP_HEADER_NAME[header];
parts_array[(*ind)++] = ": ";
parts_array[(*ind)++] = value;
parts_array[(*ind)++] = "\n";
}
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