AtpRemoteBlob.get_or_create: stop checking mime type

will bring back once we've resolved #1348 (comment)

for https://console.cloud.google.com/errors/detail/CK6IvpH4rPPzdg;time=P1D;locations=global?project=bridgy-federated

atproto.py

@@ -739,10 +739,10 @@ def _convert(cls, obj, fetch_blobs=False, from_user=None):
 
         blobs = {}  # maps str URL to dict blob object
         if fetch_blobs:
-            def fetch_blob(url, blob_field, name, check_size=True):
+            def fetch_blob(url, blob_field, name, check_size=True, check_type=True):
                 if url and url not in blobs:
                     max_size = blob_field[name].get('maxSize') if check_size else None
-                    accept = blob_field[name].get('accept')
+                    accept = blob_field[name].get('accept') if check_type else None
                     try:
                         blob = AtpRemoteBlob.get_or_create(
                             url=url, get_fn=util.requests_get, max_size=max_size,
@@ -753,19 +753,19 @@ def fetch_blob(url, blob_field, name, check_size=True):
 
             for o in obj.as1, as1.get_object(obj.as1):
                 for url in util.get_urls(o, 'image'):
-                    # TODO: maybe eventually check size? the current
+                    # TODO: maybe eventually check size and type? the current
                     # 1MB limit feels too small though, and the AppView doesn't
                     # seem to validate, it's happily allowing bigger image blobs
-                    # as of 9/29/2024:
+                    # and different types as of 9/29/2024:
                     # https://github.com/snarfed/bridgy-fed/issues/1348#issuecomment-2381056468
                     fetch_blob(url, appview.defs['app.bsky.embed.images#image']['properties'],
-                               name='image', check_size=False)
+                               name='image', check_size=False, check_type=False)
 
                 for att in util.get_list(o, 'attachments'):
                     if isinstance(att, dict):
                         fetch_blob(att.get('stream', {}).get('url'),
                                    appview.defs['app.bsky.embed.video']['properties'],
-                                   name='video')
+                                   name='video', check_size=True, check_type=True)
 
         inner_obj = as1.get_object(obj.as1) or obj.as1
         orig_url = as1.get_url(inner_obj) or inner_obj.get('id')