From 2bd0c6c525f8f02e945b6d631f614fb7e48bfaee Mon Sep 17 00:00:00 2001
From: Lonami Exo <totufals@hotmail.com>
Date: Tue, 26 Jun 2018 16:39:22 +0200
Subject: [PATCH] Support URLs on send_file

---
 telethon/client/uploads.py | 24 ++++++++++++++++++------
 telethon/utils.py          |  7 +++++++
 2 files changed, 25 insertions(+), 6 deletions(-)

diff --git a/telethon/client/uploads.py b/telethon/client/uploads.py
index 61c4f22b..17db982e 100644
--- a/telethon/client/uploads.py
+++ b/telethon/client/uploads.py
@@ -3,7 +3,7 @@ import io
 import logging
 import os
 import pathlib
-import warnings
+import re
 from io import BytesIO
 from mimetypes import guess_type
 
@@ -371,14 +371,26 @@ class UploadMethods(MessageParseMethods, UserMethods):
             except TypeError:
                 return None, None  # Can't turn whatever was given into media
 
+        media = None
         as_image = utils.is_image(file) and not force_document
         use_cache = types.InputPhoto if as_image else types.InputDocument
-        file_handle = await self.upload_file(
-            file, progress_callback=progress_callback,
-            use_cache=use_cache if allow_cache else None
-        )
+        if isinstance(file, str) and re.match('https?://', file):
+            file_handle = None
+            if as_image:
+                media = types.InputMediaPhotoExternal(file)
+            elif not force_document and utils.is_gif(file):
+                media = types.InputMediaGifExternal(file, '')
+            else:
+                media = types.InputMediaDocumentExternal(file)
+        else:
+            file_handle = await self.upload_file(
+                file, progress_callback=progress_callback,
+                use_cache=use_cache if allow_cache else None
+            )
 
-        if isinstance(file_handle, use_cache):
+        if media:
+            pass  # Already have media, don't check the rest
+        elif isinstance(file_handle, use_cache):
             # File was cached, so an instance of use_cache was returned
             if as_image:
                 media = types.InputMediaPhoto(file_handle)
diff --git a/telethon/utils.py b/telethon/utils.py
index 1f21b22a..2dcd086e 100644
--- a/telethon/utils.py
+++ b/telethon/utils.py
@@ -510,6 +510,13 @@ def is_image(file):
     return re.match(r'\.(png|jpe?g)', _get_extension(file), re.IGNORECASE)
 
 
+def is_gif(file):
+    """
+    Returns ``True`` if the file extension looks like a gif file to Telegram.
+    """
+    return re.match(r'\.gif', _get_extension(file), re.IGNORECASE)
+
+
 def is_audio(file):
     """Returns ``True`` if the file extension looks like an audio file."""
     file = 'a' + _get_extension(file)