Fix http.server's request handling case on trailing '/'.

Patch contributed by Vajrasky Kok. Addresses Issue #17324

Lib/http/server.py

@@ -780,6 +780,8 @@ class SimpleHTTPRequestHandler(BaseHTTPRequestHandler):
         # abandon query parameters
         path = path.split('?',1)[0]
         path = path.split('#',1)[0]
+        # Don't forget explicit trailing slash when normalizing. Issue17324
+        trailing_slash = True if path.rstrip().endswith('/') else False
         path = posixpath.normpath(urllib.parse.unquote(path))
         words = path.split('/')
         words = filter(None, words)
@@ -789,6 +791,8 @@ class SimpleHTTPRequestHandler(BaseHTTPRequestHandler):
             head, word = os.path.split(word)
             if word in (os.curdir, os.pardir): continue
             path = os.path.join(path, word)
+        if trailing_slash:
+            path += '/'
         return path
 
     def copyfile(self, source, outputfile):

Lib/test/test_httpservers.py

@@ -249,6 +249,9 @@ class SimpleHTTPServerTestCase(BaseTestCase):
         #constructs the path relative to the root directory of the HTTPServer
         response = self.request(self.tempdir_name + '/test')
         self.check_status_and_reason(response, 200, data=self.data)
+        # check for trailing "/" which should return 404. See Issue17324
+        response = self.request(self.tempdir_name + '/test/')
+        self.check_status_and_reason(response, 404)
         response = self.request(self.tempdir_name + '/')
         self.check_status_and_reason(response, 200)
         response = self.request(self.tempdir_name)

Misc/NEWS

@@ -68,6 +68,10 @@ Core and Builtins
 Library
 -------
 
+
+- Issue #17324: Fix http.server's request handling case on trailing '/'. Patch
+  contributed by Vajrasky Kok.
+
 - Issue #18784: The uuid module no more attempts to load libc via ctypes.CDLL,
   if all necessary functions are already found in libuuid.
   Patch by Evgeny Sologubov.