Quick fix to gr.utils.validate_url (#2659)

* fix validate

* formatting

* fix tests

* added flaky mark

CHANGELOG.md

@@ -7,6 +7,9 @@
 * Updated the minimum FastApi used in tests to version 0.87 [@freddyaboulton](https://github.com/freddyaboulton) in [PR 2647](https://github.com/gradio-app/gradio/pull/2647)
 * Fixed bug where interfaces with examples could not be loaded with `gr.Interface.load` by [@freddyaboulton](https://github.com/freddyaboulton) [PR 2640](https://github.com/gradio-app/gradio/pull/2640)
 * Fixed bug where the `interactive` property of a component could not be updated by [@freddyaboulton](https://github.com/freddyaboulton) in [PR 2639](https://github.com/gradio-app/gradio/pull/2639)
+* Fixed bug where some URLs were not being recognized as valid URLs and thus were not
+loading correctly in various components by [@abidlabs](https://github.com/abidlabs) in [PR 2659](https://github.com/gradio-app/gradio/pull/2659)
+
 
 ## Documentation Changes:
 No changes to highlight.

gradio/utils.py

@@ -678,12 +678,11 @@ def append_unique_suffix(name: str, list_of_names: List[str]):
 
 
 def validate_url(possible_url: str) -> bool:
+    headers = {"User-Agent": "gradio (https://gradio.app/; team@gradio.app)"}
     try:
-        if requests.get(possible_url).status_code == 200:
-            return True
+        return requests.get(possible_url, headers=headers).ok
     except Exception:
-        pass
-    return False
+        return False
 
 
 def is_update(val):

test/test_utils.py

@@ -31,6 +31,7 @@ from gradio.utils import (
     readme_to_html,
     sanitize_list_for_csv,
     sanitize_value_for_csv,
+    validate_url,
     version_check,
 )
 
@@ -488,6 +489,21 @@ class TestSanitizeForCSV:
         assert sanitize_list_for_csv([1, ["ab", "=de"]]) == [1, ["ab", "'=de"]]
 
 
+class TestValidateURL:
+    @pytest.mark.flaky
+    def test_valid_urls(self):
+        assert validate_url("https://www.gradio.app")
+        assert validate_url("http://gradio.dev")
+        assert validate_url(
+            "https://upload.wikimedia.org/wikipedia/commons/b/b0/Bengal_tiger_%28Panthera_tigris_tigris%29_female_3_crop.jpg"
+        )
+
+    def test_invalid_urls(self):
+        assert not (validate_url("C:/Users/"))
+        assert not (validate_url("C:\\Users\\"))
+        assert not (validate_url("/home/user"))
+
+
 class TestAppendUniqueSuffix:
     def test_no_suffix(self):
         name = "test"