[Python] Add Support for Content-Disposition Header without filename (#11055)

* [Python] Add Support for CD header w/o filename

* updated documentation per PR instructions

* fixed formatting and updated samples and docs

* revert docs changes

* regenerate python samples

* updated sample python test

modules/openapi-generator/src/main/resources/python/model_utils.mustache

@@ -8,6 +8,7 @@ import os
 import pprint
 import re
 import tempfile
+import uuid
 
 from dateutil.parser import parse
 
@@ -1082,7 +1083,13 @@ def deserialize_file(response_data, configuration, content_disposition=None):
 
     if content_disposition:
         filename = re.search(r'filename=[\'"]?([^\'"\s]+)[\'"]?',
-                             content_disposition).group(1)
+                             content_disposition,
+                             flags=re.I)
+        if filename is not None:
+            filename = filename.group(1)
+        else:
+            filename = "default_" + str(uuid.uuid4())
+
         path = os.path.join(os.path.dirname(path), filename)
 
     with open(path, "wb") as f:

samples/client/petstore/python/petstore_api/model_utils.py

@@ -16,6 +16,7 @@ import os
 import pprint
 import re
 import tempfile
+import uuid
 
 from dateutil.parser import parse
 
@@ -1399,7 +1400,13 @@ def deserialize_file(response_data, configuration, content_disposition=None):
 
     if content_disposition:
         filename = re.search(r'filename=[\'"]?([^\'"\s]+)[\'"]?',
-                             content_disposition).group(1)
+                             content_disposition,
+                             flags=re.I)
+        if filename is not None:
+            filename = filename.group(1)
+        else:
+            filename = "default_" + str(uuid.uuid4())
+
         path = os.path.join(os.path.dirname(path), filename)
 
     with open(path, "wb") as f:

samples/client/petstore/python_disallowAdditionalPropertiesIfNotPresent/petstore_api/model_utils.py

@@ -16,6 +16,7 @@ import os
 import pprint
 import re
 import tempfile
+import uuid
 
 from dateutil.parser import parse
 
@@ -1399,7 +1400,13 @@ def deserialize_file(response_data, configuration, content_disposition=None):
 
     if content_disposition:
         filename = re.search(r'filename=[\'"]?([^\'"\s]+)[\'"]?',
-                             content_disposition).group(1)
+                             content_disposition,
+                             flags=re.I)
+        if filename is not None:
+            filename = filename.group(1)
+        else:
+            filename = "default_" + str(uuid.uuid4())
+
         path = os.path.join(os.path.dirname(path), filename)
 
     with open(path, "wb") as f:

samples/openapi3/client/extensions/x-auth-id-alias/python/x_auth_id_alias/model_utils.py

@@ -16,6 +16,7 @@ import os
 import pprint
 import re
 import tempfile
+import uuid
 
 from dateutil.parser import parse
 
@@ -1399,7 +1400,13 @@ def deserialize_file(response_data, configuration, content_disposition=None):
 
     if content_disposition:
         filename = re.search(r'filename=[\'"]?([^\'"\s]+)[\'"]?',
-                             content_disposition).group(1)
+                             content_disposition,
+                             flags=re.I)
+        if filename is not None:
+            filename = filename.group(1)
+        else:
+            filename = "default_" + str(uuid.uuid4())
+
         path = os.path.join(os.path.dirname(path), filename)
 
     with open(path, "wb") as f:

samples/openapi3/client/features/dynamic-servers/python/dynamic_servers/model_utils.py

@@ -16,6 +16,7 @@ import os
 import pprint
 import re
 import tempfile
+import uuid
 
 from dateutil.parser import parse
 
@@ -1399,7 +1400,13 @@ def deserialize_file(response_data, configuration, content_disposition=None):
 
     if content_disposition:
         filename = re.search(r'filename=[\'"]?([^\'"\s]+)[\'"]?',
-                             content_disposition).group(1)
+                             content_disposition,
+                             flags=re.I)
+        if filename is not None:
+            filename = filename.group(1)
+        else:
+            filename = "default_" + str(uuid.uuid4())
+
         path = os.path.join(os.path.dirname(path), filename)
 
     with open(path, "wb") as f:

samples/openapi3/client/petstore/python/petstore_api/model_utils.py

@@ -16,6 +16,7 @@ import os
 import pprint
 import re
 import tempfile
+import uuid
 
 from dateutil.parser import parse
 
@@ -1399,7 +1400,13 @@ def deserialize_file(response_data, configuration, content_disposition=None):
 
     if content_disposition:
         filename = re.search(r'filename=[\'"]?([^\'"\s]+)[\'"]?',
-                             content_disposition).group(1)
+                             content_disposition,
+                             flags=re.I)
+        if filename is not None:
+            filename = filename.group(1)
+        else:
+            filename = "default_" + str(uuid.uuid4())
+
         path = os.path.join(os.path.dirname(path), filename)
 
     with open(path, "wb") as f:

samples/openapi3/client/petstore/python/tests_manual/test_fake_api.py

@@ -495,21 +495,25 @@ class TestFakeApi(unittest.TestCase):
 
         # sample from http://www.jtricks.com/download-text
         file_name = 'content.txt'
-        headers = {'Content-Disposition': 'attachment; filename={}'.format(file_name), 'Content-Type': 'text/plain'}
+        headers_dict = {
-        def get_headers():
+                    'with_filename': {'Content-Disposition': 'attachment; filename={}'.format(file_name), 'Content-Type': 'text/plain'},
-            return headers
+                    'no_filename': {'Content-Disposition': 'attachment;', 'Content-Type': 'text/plain'}
-        def get_header(name, default=None):
+        }
-            return headers.get(name, default)
+        def get_headers(*args):
+            return args
         file_data = (
             "You are reading text file that was supposed to be downloaded\r\n"
             "to your hard disk. If your browser offered to save you the file,"
             "\r\nthen it handled the Content-Disposition header correctly."
         )
+        for key, headers in headers_dict.items():
+            def get_header(name, default=None):
+                return headers_dict[key].get(name, default)
             http_response = HTTPResponse(
                 status=200,
                 reason='OK',
                 data=file_data,
-            getheaders=get_headers,
+                getheaders=get_headers(headers),
                 getheader=get_header
             )
             # deserialize response to a file