The home page specified in the account settings is converted to a
clickable link on the user's profile. Make sure it is a valid URL which
uses the http or https scheme.

Signed-off-by: Lukas Fleischer <[email protected]>
---
 web/lib/acctfuncs.inc.php |  4 ++++
 web/lib/aur.inc.php       | 20 ++++++++++++++++++++
 2 files changed, 24 insertions(+)

diff --git a/web/lib/acctfuncs.inc.php b/web/lib/acctfuncs.inc.php
index bdcaaa8..b8d9dc5 100644
--- a/web/lib/acctfuncs.inc.php
+++ b/web/lib/acctfuncs.inc.php
@@ -162,6 +162,10 @@ function 
process_account_form($TYPE,$A,$U="",$T="",$S="",$E="",$H="",$P="",$C=""
                $error = __("The email address is invalid.");
        }
 
+       if (!$error && !valid_homepage($HP)) {
+               $error = __("The home page is invalid, please specify the full 
HTTP(s) URL.");
+       }
+
        if (!$error && $K != '' && !valid_pgp_fingerprint($K)) {
                $error = __("The PGP key fingerprint is invalid.");
        }
diff --git a/web/lib/aur.inc.php b/web/lib/aur.inc.php
index 6cd0451..feb4006 100644
--- a/web/lib/aur.inc.php
+++ b/web/lib/aur.inc.php
@@ -150,6 +150,26 @@ function valid_email($addy) {
        return true;
 }
 
+/**
+ * Verify that a given URL is valid and uses the HTTP(s) protocol
+ *
+ * @param string $url URL of the home page to be validated
+ *
+ * @return bool True if URL passes validity checks, false otherwise
+ */
+function valid_homepage($url) {
+       if (filter_var($url, FILTER_VALIDATE_URL) === false) {
+               return false;
+       }
+
+       $url_components = parse_url($url);
+       if (!in_array($url_components['scheme'], array('http', 'https'))) {
+               return false;
+       }
+
+       return true;
+}
+
 /**
  * Generate a unique session ID
  *
-- 
2.15.0

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