From 9270a0077ed0b78311db3267bdbc5fc2c0ac0ac4 Mon Sep 17 00:00:00 2001
From: default <nobody@localhost>
Date: Wed, 21 Sep 2022 19:28:30 +0200
Subject: [PATCH] Added a global server handler.

---
 Makefile |   2 +-
 httpd.c  | 115 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 116 insertions(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index 2a47479..c09d3f6 100644
--- a/Makefile
+++ b/Makefile
@@ -20,4 +20,4 @@ data.o: data.c snac.h xs.h xs_json.h xs_openssl.h
 
 http.o: http.c snac.h xs.h xs_io.h xs_encdec.h xs_openssl.h xs_curl.h
 
-httpd.o: http.c snac.h xs.h xs_encdec.h xs_socket.h xs_httpd.h
+httpd.o: http.c snac.h xs.h xs_io.h xs_encdec.h xs_socket.h xs_httpd.h
diff --git a/httpd.c b/httpd.c
index 5fd8bbf..3047b3e 100644
--- a/httpd.c
+++ b/httpd.c
@@ -2,6 +2,7 @@
 /* copyright (c) 2022 grunfink - MIT license */
 
 #include "xs.h"
+#include "xs_io.h"
 #include "xs_encdec.h"
 #include "xs_json.h"
 #include "xs_socket.h"
@@ -10,11 +11,80 @@
 #include "snac.h"
 
 
+void server_get_handler(d_char *req, int *status, char **body, int *b_size, char **ctype)
+/* basic server services */
+{
+    char *req_hdrs = xs_dict_get(req, "headers");
+    char *acpt     = xs_dict_get(req_hdrs, "accept");
+    char *q_path   = xs_dict_get(req_hdrs, "path");
+
+    if (acpt == NULL) {
+        *status = 400;
+        return;
+    }
+
+    /* get the server prefix */
+    char *prefix = xs_dict_get(srv_config, "prefix");
+    if (*prefix == '\0')
+        prefix = "/";
+
+    /* is it the server root? */
+    if (strcmp(q_path, prefix) == 0) {
+        /* try to open greeting.html */
+        xs *fn = xs_fmt("%s/greeting.html", srv_basedir);
+        FILE *f;
+
+        if ((f = fopen(fn, "r")) != NULL) {
+            d_char *s = xs_readall(f);
+            fclose(f);
+
+            *status = 200;
+
+            /* does it have a %userlist% mark? */
+            if (xs_str_in(s, "%userlist%") != -1) {
+                char *host = xs_dict_get(srv_config, "host");
+                xs *list = user_list();
+                char *p, *uid;
+                xs *ul = xs_str_new("<ul class=\"snac-user-list\">\n");
+
+                p = list;
+                while (xs_list_iter(&p, &uid)) {
+                    snac snac;
+
+                    if (user_open(&snac, uid)) {
+                        xs *u = xs_fmt(
+                            "<li><a href=\"%s\">@%s@%s (%s)</a></li>\n",
+                                snac.actor, uid, host,
+                                xs_dict_get(snac.config, "name"));
+
+                        ul = xs_str_cat(ul, u);
+
+                        user_free(&snac);
+                    }
+                }
+
+                ul = xs_str_cat(ul, "</ul>\n");
+
+                s = xs_replace(s, "%userlist%", ul);
+            }
+
+            *body = s;
+        }
+    }
+}
+
 void httpd_connection(int rs)
 /* the connection loop */
 {
     FILE *f;
     xs *req;
+    char *req_hdrs;
+    char *method;
+    int status  = 0;
+    char *body  = NULL;
+    int b_size  = 0;
+    char *ctype = NULL;
+    xs *headers = NULL;
 
     f = xs_socket_accept(rs);
 
@@ -25,7 +95,52 @@ void httpd_connection(int rs)
         printf("%s\n", j);
     }
 
+    req_hdrs = xs_dict_get(req, "headers");
+
+    method = xs_dict_get(req_hdrs, "method");
+
+    if (strcmp(method, "GET") == 0) {
+        /* cascade through */
+        if (status == 0)
+            server_get_handler(req, &status, &body, &b_size, &ctype);
+    }
+    else
+    if (strcmp(method, "POST") == 0) {
+    }
+
+    /* let's go */
+    headers = xs_dict_new();
+
+    /* unattended? it's an error */
+    if (status == 0)
+        status = 404;
+
+    if (status == 404)
+        body = "<h1>404 Not Found</h1>";
+
+    if (status == 400)
+        body = "<h1>400 Bad Request</h1>";
+
+    if (status == 303)
+        headers = xs_dict_append(headers, "location", body);
+
+    if (status == 401)
+        headers = xs_dict_append(headers, "WWW-Authenticate", "Basic realm=\"IDENTIFY\"");
+
+    if (ctype == NULL)
+        ctype = "text/html; charset=utf-8";
+
+    headers = xs_dict_append(headers, "content-type", ctype);
+    headers = xs_dict_append(headers, "x-creator",    "snac/2.x");
+
+    if (b_size == 0 && body != NULL)
+        b_size = strlen(body);
+
+    xs_httpd_response(f, status, headers, body, b_size);
+
     fclose(f);
+
+    free(body);
 }