Simple server

main.c

@@ -0,0 +1,86 @@
+#define GEBS_NO_PREFIX
+#define GEBS_IMPLEMENTATION
+#include "gebs/gebs.h"
+#include "mongoose/mongoose.h"
+#define STB_DS_IMPLEMENTATION
+#include "stb/stb_ds.h"
+
+typedef void (*Route_Handler)(struct mg_connection *conn, struct mg_http_message *msg);
+
+typedef struct {
+    char *key; // path
+    Route_Handler value;
+} Route;
+
+Route *route_hashtable = NULL;
+
+void event_handler(struct mg_connection *conn, int ev, void *ev_data)
+{
+    if (ev == MG_EV_HTTP_MSG) {
+        struct mg_http_message *msg = (struct mg_http_message *)ev_data;
+        Route_Handler handler = hmget(route_hashtable, msg->uri.buf);
+        handler(conn, msg);
+    }
+}
+
+bool gpp1(char *path, NString_List *env, String_Builder *out)
+{
+    Cmd cmd = {0};
+    defer { cmd_free(&cmd); }
+
+    cmd_append(&cmd, "./gpp1");
+    cmd_append(&cmd, "-H");
+    cmd_append(&cmd, "-x");
+    cmd_append(&cmd, "--nostdinc");
+    cmd_append(&cmd, path);
+
+    for (size_t i = 0; i < env->count; i++) {
+        cmd_append(&cmd, env->items[i]);
+    }
+
+    return cmd_run_collect(&cmd, out) == 0;
+}
+
+void handle_page_not_found(struct mg_connection *conn, struct mg_http_message *msg)
+{
+    NString_List env = {0};
+    defer { list_free(&env); }
+
+    list_append(&env, fmt("-DURL=%.*s", msg->uri.len, msg->uri.buf));
+
+    String_Builder out = {0};
+    defer { sb_free(&out); }
+    bool ok = gpp1("./tmpls/404.t", &env, &out);
+    sb_finish(&out);
+
+    if (!ok) {
+        mg_http_reply(conn, 500, "Content-Type: text/html\r\n", "Internal server error ;(");
+    } else {
+        mg_http_reply(conn, 200, "Content-Type: text/html\r\n", out.items);
+    }
+}
+
+static void init_route_hashtable(void)
+{
+    hmdefault(route_hashtable, &handle_page_not_found);
+}
+
+int main(int argc, char ** argv)
+{
+    mg_log_set(MG_LL_DEBUG);
+    struct mg_mgr mgr;
+    mg_mgr_init(&mgr);
+    init_route_hashtable();
+
+    mg_http_listen(&mgr, "http://localhost:8080", &event_handler, NULL);
+
+    for (;;) {
+        mg_mgr_poll(&mgr, 1000);
+        scratch_arena_reset();
+    }
+    
+    mg_mgr_free(&mgr);
+    hmfree(route_hashtable);
+
+    return 0;
+}