Add "struct mg_http_message::head" attr

mongoose.c

@@ -570,8 +570,9 @@ int mg_http_parse(const char *s, size_t len, struct mg_http_message *hm) {
   memset(hm, 0, sizeof(*hm));
   if (req_len <= 0) return req_len;
 
-  hm->message.ptr = s;
-  hm->body.ptr = s + req_len;
+  hm->message.ptr = hm->head.ptr = s;
+  hm->body.ptr = end;
+  hm->head.len = req_len;
   hm->message.len = hm->body.len = (size_t) ~0;  // Set body length to infinite
 
   // Parse request line

mongoose.h

@@ -694,7 +694,8 @@ struct mg_http_message {
   struct mg_str method, uri, query, proto;             // Request/response line
   struct mg_http_header headers[MG_MAX_HTTP_HEADERS];  // Headers
   struct mg_str body;                                  // Body
-  struct mg_str message;  // Request line + headers + body
+  struct mg_str head;                                  // Request + headers
+  struct mg_str message;  // Request + headers + body
 };
 
 // Parameter for mg_http_serve_dir()

src/http.c

@@ -150,8 +150,9 @@ int mg_http_parse(const char *s, size_t len, struct mg_http_message *hm) {
   memset(hm, 0, sizeof(*hm));
   if (req_len <= 0) return req_len;
 
-  hm->message.ptr = s;
-  hm->body.ptr = s + req_len;
+  hm->message.ptr = hm->head.ptr = s;
+  hm->body.ptr = end;
+  hm->head.len = req_len;
   hm->message.len = hm->body.len = (size_t) ~0;  // Set body length to infinite
 
   // Parse request line

src/http.h

@@ -16,7 +16,8 @@ struct mg_http_message {
   struct mg_str method, uri, query, proto;             // Request/response line
   struct mg_http_header headers[MG_MAX_HTTP_HEADERS];  // Headers
   struct mg_str body;                                  // Body
-  struct mg_str message;  // Request line + headers + body
+  struct mg_str head;                                  // Request + headers
+  struct mg_str message;  // Request + headers + body
 };
 
 // Parameter for mg_http_serve_dir()