embed.sanitizer: add fetch_metadata function

- pipfile: remove mmh3

Pipfile

@@ -14,7 +14,6 @@ Cerberus = "==1.2"
 quart = {editable = true,ref = "e23714d5",git = "https://gitlab.com/pgjones/quart"}
 pillow = "*"
 aiohttp = "==3.4.4"
-mmh3 = "*"
 
 [dev-packages]
 pytest = "==3.10.1"

Pipfile.lock

@@ -1,7 +1,7 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "7e33ae70b481ecfe3b866d7ad431d532bf94644be3c65b832976b5efd6a269a8"
+            "sha256": "b546ad1edfe79457cb4da95e19fd17506b7adabe6a43acbc0906fb12cfda68b2"
         },
         "pipfile-spec": 6,
         "requires": {
@@ -304,13 +304,6 @@
             ],
             "version": "==1.1.0"
         },
-        "mmh3": {
-            "hashes": [
-                "sha256:185209a217c52afe43e079e5b232d0ef0f3a262601eaaf4371326ab6dcbec508"
-            ],
-            "index": "pypi",
-            "version": "==2.5.1"
-        },
         "multidict": {
             "hashes": [
                 "sha256:024b8129695a952ebd93373e45b5d341dbb87c17ce49637b34000093f243dd4f",

litecord/embed/sanitizer.py

@@ -4,6 +4,8 @@ litecord.embed.sanitizer
     such as type: rich
 """
 from typing import Dict, Any
+
+from mmh3 import hash128
 from logbook import Logger
 from quart import current_app as app
 
@@ -68,6 +70,24 @@ def proxify(url) -> str:
     )
 
 
+async def fetch_metadata(url) -> dict:
+    """Fetch metadata for a url."""
+    parsed = url.parsed
+
+    md_path = f'{parsed.scheme}/{parsed.netloc}/{parsed.path}'
+    md_base_url = app.config.MEDIA_PROXY
+
+    proto = 'https' if app.config.IS_SSL else 'http'
+
+    request_url = f'{proto}://{md_base_url}/meta/{md_path}'
+
+    async with app.session.get(request_url) as resp:
+        if resp.status != 200:
+            return
+
+        return await resp.json()
+
+
 async def fill_embed(embed: Embed) -> Embed:
     """Fill an embed with more information."""
     embed = sanitize_embed(embed)
@@ -81,8 +101,13 @@ async def fill_embed(embed: Embed) -> Embed:
             proxify(embed['author']['icon_url'])
 
     if path_exists(embed, 'image.url'):
-        # TODO: width, height
-        embed['image']['proxy_url'] = \
-            proxify(embed['image']['url'])
+        image_url = embed['image']['url']
+
+        meta = await fetch_metadata(image_url)
+        embed['image']['proxy_url'] = proxify(image_url)
+
+        if meta and meta['image']:
+            embed['image']['width'] = meta['width']
+            embed['image']['height'] = meta['height']
 
     return embed