More lightweight URI regexp

- the old one can take a lot of resources and be misused for a DoS
- this still nees to be tested if it is flexible enough
- also fix link click popup

Author: PeterSurda

src/bitmessageqt/messageview.py

@@ -70,7 +70,7 @@ def confirmURL(self, link):
             return
         reply = QtGui.QMessageBox.warning(self,
             QtGui.QApplication.translate("MessageView", "Follow external link"),
-            QtGui.QApplication.translate("MessageView", "The link \"%1\" will open in a browser. It may be a security risk, it could de-anonymise you or download malicious data. Are you sure?").arg(str(link.toString())),
+            QtGui.QApplication.translate("MessageView", "The link \"%1\" will open in a browser. It may be a security risk, it could de-anonymise you or download malicious data. Are you sure?").arg(unicode(link.toString())),
             QtGui.QMessageBox.Yes, QtGui.QMessageBox.No)
         if reply == QtGui.QMessageBox.Yes:
             QtGui.QDesktopServices.openUrl(link)

src/bitmessageqt/safehtmlparser.py

@@ -22,7 +22,8 @@ class SafeHTMLParser(HTMLParser):
     replaces_pre = [["&", "&amp;"], ["\"", "&quot;"], ["<", "&lt;"], [">", "&gt;"]]
     replaces_post = [["\n", "<br/>"], ["\t", "&nbsp;&nbsp;&nbsp;&nbsp;"], ["  ", "&nbsp; "], ["  ", "&nbsp; "], ["<br/> ", "<br/>&nbsp;"]]
     src_schemes = [ "data" ]
-    uriregex1 = re.compile(r'(?i)\b((?:(https?|ftp|bitcoin):(?:/{1,3}|[a-z0-9%])|www\d{0,3}[.]|[a-z0-9.\-]+[.][a-z]{2,4}/)(?:[^\s()<>]+|\(([^\s()<>]+|(\([^\s()<>]+\)))*\))+(?:\(([^\s()<>]+|(\([^\s()<>]+\)))*\)|[^\s`!()\[\]{};:\'".,<>?]))')
+    #uriregex1 = re.compile(r'(?i)\b((?:(https?|ftp|bitcoin):(?:/{1,3}|[a-z0-9%])|www\d{0,3}[.]|[a-z0-9.\-]+[.][a-z]{2,4}/)(?:[^\s()<>]+|\(([^\s()<>]+|(\([^\s()<>]+\)))*\))+(?:\(([^\s()<>]+|(\([^\s()<>]+\)))*\)|[^\s`!()\[\]{};:\'".,<>?]))')
+    uriregex1 = re.compile(r'((https?|ftp|bitcoin):(?:/{1,3}|[a-z0-9%])(?:[a-zA-Z]|[0-9]|[$-_@.&+#]|[!*\(\),]|(?:%[0-9a-fA-F][0-9a-fA-F]))+)')
     uriregex2 = re.compile(r'<a href="([^"]+)&amp;')
     emailregex = re.compile(r'\b([A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,})\b')