fix: Multipart boundaries are case sensitive

bottle.py

@@ -1391,7 +1391,8 @@ def POST(self):
             instances of :class:`FileUpload`.
         """
         post = FormsDict()
-        content_type, options = _parse_http_header(self.content_type)[0]
+        content_type = self.environ.get('CONTENT_TYPE', '')
+        content_type, options = _parse_http_header(content_type)[0]
         # We default to application/x-www-form-urlencoded for everything that
         # is not multipart and take the fast path (also: 3.1 workaround)
         if not content_type.startswith('multipart/'):

test/tools.py

@@ -152,11 +152,11 @@ def assertInError(self, search, route='/', **kargs):
             self.fail('The search pattern "%s" is not included in wsgi.error: %s' % (search, err))
 
 def multipart_environ(fields, files):
-    boundary = str(uuid.uuid1())
+    boundary = 'lowerUPPER-1234'
     env = {'REQUEST_METHOD':'POST',
            'CONTENT_TYPE':  'multipart/form-data; boundary='+boundary}
     wsgiref.util.setup_testing_defaults(env)
-    boundary = '--' + boundary
+    boundary = '--' + boundary 
     body = ''
     for name, value in fields:
         body += boundary + '\r\n'