Quote filenames in Location header on redirect

When we redirect the user to the "correct" file name this name should
end up quoted in the header, else we would end up in an infinite
redirect loop.

ChangeLog

@@ -11,6 +11,8 @@ Unreleased
 	  wished the ports can be set from outside by specifying the
 	  environment variables SERVEFILE_DEFAULT_PORT and
 	  SERVEFILE_SECONDARY_PORT
+	* fixed broken redirect when filename contained umlauts or other characters
+	  that should have been quoted
 
 
 2020-10-30 v0.5.1

servefile/servefile.py

@@ -60,7 +60,7 @@ class FileBaseHandler(BaseHTTPServer.BaseHTTPRequestHandler):
 			fileName = self.fileName
 		if unquote(self.path) != "/" + fileName:
 			self.send_response(302)
-			self.send_header('Location', '/' + fileName)
+			self.send_header('Location', '/' + quote(fileName))
 			self.end_headers()
 			return True
 		return False

tests/test_servefile.py

@@ -1,3 +1,4 @@
+# -*- coding: utf-8 -*-
 import io
 import os
 import pytest
@@ -14,9 +15,11 @@ import urllib3
 
 if sys.version_info.major >= 3:
     from pathlib import Path
+    from urllib.parse import quote
     connrefused_exc = ConnectionRefusedError
 else:
     from pathlib2 import Path
+    from urllib import quote
     connrefused_exc = socket.error
 
 
@@ -162,6 +165,21 @@ def test_redirect_and_download(run_servefile, datadir):
     check_download(data, fname='testfile')
 
 
+def test_redirect_and_download_with_umlaut(run_servefile, datadir):
+    data = "NÖÖT NÖÖT"
+    filename = "tästføile"
+    p = datadir({filename: data}) / filename
+    run_servefile(str(p))
+
+    # redirect
+    r = make_request(allow_redirects=False)
+    assert r.status_code == 302
+    assert r.headers.get('Location') == '/{}'.format(quote(filename))
+
+    # normal download
+    check_download(data, fname=filename)
+
+
 def test_specify_port(run_servefile, datadir):
     data = "NOOT NOOT"
     p = datadir({'testfile': data}) / 'testfile'
@@ -210,6 +228,7 @@ def test_serve_directory(run_servefile, datadir):
         'bar': {'thisisaverylongfilenamefortestingthatthisstillworksproperly': 'jup!'},
         'noot': 'still data in here',
         'bigfile': 'x' * (10 * 1024 ** 2),
+        'möwe': 'KRAKRAKRAKA',
     }
     p = datadir(d)
     run_servefile([str(p), '-l'])
@@ -219,7 +238,7 @@ def test_serve_directory(run_servefile, datadir):
     for path in '/', '/../':
         r = make_request(path)
         for k in d:
-            assert k in r.text
+            assert quote(k) in r.text
 
     for fname, content in d['foo'].items():
         check_download(content, '/foo/' + fname)