feat(lnm): more request processing code

lnm/include/lnm/http/loop.h

@@ -5,6 +5,7 @@
 
 #include "lnm/common.h"
 #include "lnm/http/req.h"
+#include "lnm/http/res.h"
 
 typedef struct lnm_loop lnm_http_loop;
 
@@ -14,14 +15,14 @@ typedef struct lnm_http_step lnm_http_step;
 
 typedef struct lnm_http_route lnm_http_route;
 
-typedef enum lnm_step_err {
-  lnm_step_err_done = 0,
-  lnm_step_err_io_needed,
-  lnm_step_err_close,
-  lnm_step_err_res,
-} lnm_step_err;
+typedef enum lnm_http_step_err {
+  lnm_http_step_err_done = 0,
+  lnm_http_step_err_io_needed,
+  lnm_http_step_err_close,
+  lnm_http_step_err_res,
+} lnm_http_step_err;
 
-typedef lnm_step_err (*lnm_http_step_fn)(lnm_http_conn *conn);
+typedef lnm_http_step_err (*lnm_http_step_fn)(lnm_http_conn *conn);
 
 typedef lnm_err (*lnm_http_ctx_init_fn)(void **c_ctx, void *gctx);
 
@@ -84,9 +85,22 @@ void lnm_http_loop_route_add(lnm_http_loop *hl, lnm_http_route *route);
  * Represents what state an HTTP loop request is currently in.
  */
 typedef enum lnm_http_loop_state {
+  // Parse the HTTP request
   lnm_http_loop_state_parse_req = 0,
+  // Route the request
   lnm_http_loop_state_route,
+  // Parse specific headers (e.g. Content-Length)
+  lnm_http_loop_state_parse_headers,
+  // Execute the various steps defined for the route
   lnm_http_loop_state_steps,
+  // Write the response status line
+  lnm_http_loop_state_write_status_line,
+  // Write the various response headers
+  lnm_http_loop_state_write_headers,
+  // Write the request body
+  lnm_http_loop_state_write_body,
+  // Clean up the request and reset the state for a next request
+  lnm_http_loop_state_finish,
 } lnm_http_loop_state;
 
 typedef struct lnm_http_loop_gctx {
@@ -103,7 +117,9 @@ typedef struct lnm_http_loop_gctx {
 typedef struct lnm_http_loop_ctx {
   lnm_http_loop_state state;
   lnm_http_req req;
+  lnm_http_res res;
   lnm_http_route *route;
+  lnm_http_step *cur_step;
   lnm_http_loop_gctx *g;
   void *c;
 } lnm_http_loop_ctx;

lnm/include/lnm/http/res.h

@@ -0,0 +1,30 @@
+#ifndef LNM_HTTP_RES
+#define LNM_HTTP_RES
+
+#include <stdbool.h>
+
+#include "lnm/http/consts.h"
+
+typedef struct lnm_http_res_header {
+  struct {
+    char *s;
+    size_t len;
+    bool owned;
+  } name;
+  struct {
+    char *s;
+    size_t len;
+    bool owned;
+  } value;
+  struct lnm_http_res_header *next;
+} lnm_http_res_header;
+
+typedef struct lnm_http_res {
+  lnm_http_status status;
+  struct {
+    lnm_http_res_header *head;
+    lnm_http_res_header *current;
+  } headers;
+} lnm_http_res;
+
+#endif