commit 748b15facbb42406a4fe72cfa4de2e72f005492e
from: Omar Polo <op@omarpolo.com>
date: Fri Mar 12 09:40:52 2021 UTC

add mime.c

commit - c07ac9967137c45b2019bf763346346539b48d98
commit + 748b15facbb42406a4fe72cfa4de2e72f005492e
blob - /dev/null
blob + 41a108da42b5eecce78b047c15f77978f6fa2a86 (mode 644)
--- /dev/null
+++ mime.c
@@ -0,0 +1,88 @@
+/*
+ * Copyright (c) 2021 Omar Polo <op@omarpolo.com>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "telescope.h"
+
+#include <ctype.h>
+#include <fnmatch.h>
+#include <string.h>
+
+static int	check_for_utf8(char*);
+
+static struct parser_table {
+	const char	*mediatype;
+	void		(*parserinit)(struct parser*);
+} ptable[] = {
+	{ "text/gemini", gemtext_initparser },
+	/* { "text\n/ *", textplain_initparser } */
+	{ NULL, NULL}
+};
+
+static int
+check_for_utf8(char *b)
+{
+	for (;;) {
+		while (*b != '\0' && isspace(*b))
+			b++;
+		if (*b == '\0')
+			break;
+		if (!has_prefix(b, "charset=")) {
+			while (*b != '\0' && *b != ';')
+				b++;
+			if (*b == '\0')
+				break;
+			b++;
+			continue;
+		}
+
+		/* is charset= */
+		b += strlen("charset=");
+		/* TODO: improve the matching */
+		return has_prefix(b, "ASCII") || has_prefix(b, "ascii") ||
+			has_prefix(b, "UTF-8") || has_prefix(b, "utf-8");
+	}
+
+	return 1;
+}
+
+int
+setup_parser_for(struct tab *tab)
+{
+	char			*b, buf[GEMINI_URL_LEN] = {0};
+	struct parser_table	*t;
+
+        memcpy(buf, tab->meta, sizeof(tab->meta));
+
+	for (b = buf; *b != ';' && *b != '\0'; ++b)
+		;
+
+	if (*b == ';') {
+		*b = '\0';
+		++b;
+	}
+
+	if (!check_for_utf8(b))
+		return 0;
+
+	for (t = ptable; t->mediatype != NULL; ++t) {
+		if (!fnmatch(t->mediatype, buf, 0)) {
+			t->parserinit(&tab->page);
+			return 1;
+		}
+	}
+
+	return 0;
+}