Merge pull request #96 from consideRatio/pr/tigervnc-check

Fix TigerVNC detection for non-apt installations

jupyter_remote_desktop_proxy/setup_websockify.py

@@ -21,9 +21,17 @@ def setup_websockify():
     # TigerVNC provides the option to connect a Unix socket. TurboVNC does not.
     # TurboVNC and TigerVNC share the same origin and both use a Perl script
     # as the executable vncserver. We can determine if vncserver is TigerVNC
-    # by searching TigerVNC string in the Perl script.
+    # by searching tigervnc string in the Perl script.
+    #
+    # The content of the vncserver executable can differ depending on how
+    # TigerVNC and TurboVNC has been distributed. Below are files known to be
+    # read in some situations:
+    #
+    # - https://github.com/TigerVNC/tigervnc/blob/v1.13.1/unix/vncserver/vncserver.in
+    # - https://github.com/TurboVNC/turbovnc/blob/3.1.1/unix/vncserver.in
+    #
     with open(vncserver) as vncserver_file:
-        is_tigervnc = "TigerVNC" in vncserver_file.read()
+        is_tigervnc = "tigervnc" in vncserver_file.read().casefold()
 
     if is_tigervnc:
         vnc_args = [vncserver, '-rfbunixpath', sockets_path]