add debug print and fix double free of content type

request_handler.c

@@ -1,21 +1,28 @@
 #include "request_handler.h"
 
 void parse_http_request(char* request, int length, struct http_request* req);
+void debug_print_request(char* request);
 
 void handle_request(char* request, int length, char* response,
                     size_t* response_length) {
     // Terminate request with EOF so strtok stops at end of string
     request[length] = EOF;
 
-    printf("Request ---------\n");
-    printf("%s\n---------\n", request);
+    // printf("Request ---------\n");
+    // printf("%s\n---------\n", request);
+
+    debug_print_request(request);
 
     printf("parsing request ---------\n");
     // Parse request into struct
-    http_request req = *create_http_request();
-    parse_http_request(request, length, &req);
-    print_http_request(&req);
+    http_request* req = create_http_request();
+    parse_http_request(request, length, req);
+    print_http_request(req);
+    // request_info_print(req);
+
     printf("---------\n");
+    free_http_request(req);
+    printf("req pointer value: %d\n", (int)req);
 
     // Create reponse string
     char* ptr_temp = response;
@@ -62,12 +69,14 @@ void handle_request(char* request, int length, char* response,
 }
 
 void parse_http_request(char* request, int length, struct http_request* req) {
+    // printf("Parsing request\n");
     // Get the end of the first line
     char* request_line_end = strstr(request, "\r\n");
     if (request_line_end == NULL) {
         printf("Invalid packet (end first line)\n");
         return;
     }
+    // printf("Parsed request line end\n");
 
     // Extract request type
     char* type_start = request;
@@ -79,6 +88,7 @@ void parse_http_request(char* request, int length, struct http_request* req) {
     req->method = (char*)malloc(type_end - type_start + 1);
     strncpy(req->method, type_start, type_end - type_start);
     req->method[type_end - type_start] = '\0';
+    // printf("Parsed request type\n");
 
     // Extract URL
     char* url_start = type_end + 1;
@@ -90,6 +100,7 @@ void parse_http_request(char* request, int length, struct http_request* req) {
     req->url = (char*)malloc(url_end - url_start + 1);
     strncpy(req->url, url_start, url_end - url_start);
     req->url[url_end - url_start] = '\0';
+    // printf("Parsed request url\n");
 
     // Extract headers
     char* headers_end = strstr(request_line_end + 2, "\r\n\r\n");
@@ -106,7 +117,7 @@ void parse_http_request(char* request, int length, struct http_request* req) {
     char* header_start = headers_start;
     while (1) {
         char* header_end = strstr(header_start, "\r\n");
-        if (header_end >= headers_end) {
+        if (header_start >= headers_end) {
             break;
         }
         char* delim = strstr(header_start, ": ");
@@ -119,10 +130,40 @@ void parse_http_request(char* request, int length, struct http_request* req) {
                              header_end - (delim + 2));
         header_start = header_end + 2;
     }
+    // printf("Parsed request headers\n");
 
-    // Fill in content type and length
-    req->content_type = get_header_value_request(req, "Content-Type");
+    // Fill in content type and length. In order to avoid a double free we copy
+    // the content type instead of just pointing to the request header
+    req->content_type =
+        malloc(strlen(get_header_value_request(req, "Content-Type")) + 1);
+    strcpy(req->content_type, get_header_value_request(req, "Content-Type"));
     req->content_length = atoi(get_header_value_request(req, "Content-Length"));
+    // printf("Parsed request content type and length\n");
 
     return;
-};
+};
+
+void debug_print_request(char* request) {
+    // Copy request
+    char* request_copy = (char*)malloc(strlen(request) + 1);
+    strcpy(request_copy, request);
+
+    // Iterate through request and print "\\r\\n" before each \r\n
+    // and "\\r\\n\\r\\n" before each \r\n\r\n
+    char* ptr = request_copy;
+    while (*ptr != '\0') {
+        if (*ptr == '\r' && *(ptr + 1) == '\n') {
+            if (*(ptr + 2) == '\r' && *(ptr + 3) == '\n') {
+                printf("\\r\\n\\r\\n\n");
+                ptr += 4;
+            } else {
+                printf("\\r\\n\n");
+                ptr += 2;
+            }
+        } else {
+            printf("%c", *ptr);
+            ptr++;
+        }
+    }
+    printf("\n");
+}