runserver: reimplemented http server without libevent

yeah, this patch implements a "complete" http server for static files.
It is not the best code possible, and would be easily DDoS'able if used
in production, as it spawns a thread for each request, without limiting.

I'm sickish and this is the best code I can deliver now. At least it
works! ;)

1 files changed, 100 insertions, 0 deletions

diff --git a/src/blogc-runserver/httpd-utils.c b/src/blogc-runserver/httpd-utils.c
new file mode 100644
index 0000000..e935668
--- /dev/null
+++ b/src/blogc-runserver/httpd-utils.c
@@ -0,0 +1,100 @@
+/*
+ * blogc: A blog compiler.
+ * Copyright (C) 2015-2016 Rafael G. Martins <rafael@rafaelmartins.eng.br>
+ *
+ * This program can be distributed under the terms of the BSD License.
+ * See the file LICENSE.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif /* HAVE_CONFIG_H */
+
+#include <stdbool.h>
+#include <string.h>
+#include <unistd.h>
+#include "../common/utils.h"
+#include "httpd-utils.h"
+
+
+char*
+br_readline(int socket)
+{
+    bc_string_t *rv = bc_string_new();
+    char buffer[READLINE_BUFFER_SIZE];
+    ssize_t len;
+
+    while ((len = read(socket, buffer, READLINE_BUFFER_SIZE)) != -1) {
+        for (ssize_t i = 0; i < len; i++) {
+            if (buffer[i] == '\r' || buffer[i] == '\n')
+                goto end;
+            bc_string_append_c(rv, buffer[i]);
+        }
+    }
+
+end:
+    return bc_string_free(rv, false);
+}
+
+
+int
+br_hextoi(const char c)
+{
+    if (c >= '0' && c <= '9')
+        return c - '0';
+    if (c >= 'a' && c <= 'f')
+        return c - 'a' + 10;
+    if (c >= 'A' && c <= 'F')
+        return c - 'A' + 10;
+    return -1;
+}
+
+
+char*
+br_urldecode(const char *str)
+{
+    bc_string_t *rv = bc_string_new();
+
+    for (size_t i = 0; i < strlen(str); i++) {
+        switch (str[i]) {
+            case '%':
+                if (i + 2 < strlen(str)) {
+                    int p1 = br_hextoi(str[i + 1]) * 16;
+                    int p2 = br_hextoi(str[i + 2]);
+                    if (p1 >= 0 && p2 >= 0) {
+                        bc_string_append_c(rv, p1 + p2);
+                        i += 2;
+                        continue;
+                    }
+                }
+                bc_string_append_c(rv, '%');
+                break;
+            case '+':
+                bc_string_append_c(rv, ' ');
+                break;
+            default:
+                bc_string_append_c(rv, str[i]);
+        }
+    }
+
+    return bc_string_free(rv, false);
+}
+
+
+const char*
+br_get_extension(const char *filename)
+{
+    const char *ext = NULL;
+    unsigned int i;
+    for (i = strlen(filename); i > 0; i--) {
+        if (filename[i] == '.') {
+            ext = filename + i + 1;
+            break;
+        }
+        if ((filename[i] == '/') || (filename[i] == '\\'))
+            return NULL;
+    }
+    if (i == 0)
+        return NULL;
+    return ext;
+}