2 files changed, 171 insertions, 0 deletions
diff --git a/src/util/UriUtil.cxx b/src/util/UriUtil.cxx
new file mode 100644
index 000000000..4b0cec11b
--- /dev/null
+++ b/src/util/UriUtil.cxx
@@ -0,0 +1,113 @@
+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "UriUtil.hxx"
+
+#include <glib.h>
+
+#include <assert.h>
+#include <string.h>
+
+bool uri_has_scheme(const char *uri)
+{
+	return strstr(uri, "://") != nullptr;
+}
+
+/* suffixes should be ascii only characters */
+const char *
+uri_get_suffix(const char *uri)
+{
+	const char *suffix = strrchr(uri, '.');
+	if (suffix == nullptr)
+		return nullptr;
+
+	++suffix;
+
+	if (strpbrk(suffix, "/\\") != nullptr)
+		return nullptr;
+
+	return suffix;
+}
+
+static const char *
+verify_uri_segment(const char *p)
+{
+	const char *q;
+
+	unsigned dots = 0;
+	while (*p == '.') {
+		++p;
+		++dots;
+	}
+
+	if (dots <= 2 && (*p == 0 || *p == '/'))
+		return nullptr;
+
+	q = strchr(p + 1, '/');
+	return q != nullptr ? q : "";
+}
+
+bool
+uri_safe_local(const char *uri)
+{
+	while (true) {
+		uri = verify_uri_segment(uri);
+		if (uri == nullptr)
+			return false;
+
+		if (*uri == 0)
+			return true;
+
+		assert(*uri == '/');
+
+		++uri;
+	}
+}
+
+char *
+uri_remove_auth(const char *uri)
+{
+	const char *auth, *slash, *at;
+	char *p;
+
+	if (strncmp(uri, "http://", 7) == 0)
+		auth = uri + 7;
+	else if (strncmp(uri, "https://", 8) == 0)
+		auth = uri + 8;
+	else
+		/* unrecognized URI */
+		return nullptr;
+
+	slash = strchr(auth, '/');
+	if (slash == nullptr)
+		slash = auth + strlen(auth);
+
+	at = (const char *)memchr(auth, '@', slash - auth);
+	if (at == nullptr)
+		/* no auth info present, do nothing */
+		return nullptr;
+
+	/* duplicate the full URI and then delete the auth
+	   information */
+	p = g_strdup(uri);
+	memmove(p + (auth - uri), p + (at + 1 - uri),
+		strlen(at));
+
+	return p;
+}
diff --git a/src/util/UriUtil.hxx b/src/util/UriUtil.hxx
new file mode 100644
index 000000000..1d288ca1d
--- /dev/null
+++ b/src/util/UriUtil.hxx
@@ -0,0 +1,58 @@
+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef MPD_URI_UTIL_HXX
+#define MPD_URI_UTIL_HXX
+
+#include "gcc.h"
+
+/**
+ * Checks whether the specified URI has a scheme in the form
+ * "scheme://".
+ */
+gcc_pure
+bool uri_has_scheme(const char *uri);
+
+gcc_pure
+const char *
+uri_get_suffix(const char *uri);
+
+/**
+ * Returns true if this is a safe "local" URI:
+ *
+ * - non-empty
+ * - does not begin or end with a slash
+ * - no double slashes
+ * - no path component begins with a dot
+ */
+gcc_pure
+bool
+uri_safe_local(const char *uri);
+
+/**
+ * Removes HTTP username and password from the URI.  This may be
+ * useful for displaying an URI without disclosing secrets.  Returns
+ * NULL if nothing needs to be removed, or if the URI is not
+ * recognized.
+ */
+gcc_malloc
+char *
+uri_remove_auth(const char *uri);
+
+#endif