1 files changed, 39 insertions, 0 deletions
diff --git a/modules/link.py b/modules/link.py
new file mode 100644
index 0000000..68f56e1
--- /dev/null
+++ b/modules/link.py
@@ -0,0 +1,39 @@
+from aiohttp import ClientSession, ClientResponse
+from bs4 import BeautifulSoup
+from discord import Embed
+from discord.ext.commands import Bot, command, Context
+
+
+class Link(object):
+    def __init__(self, bot: Bot):
+        self.bot = bot
+
+    @command(aliases=['unshorten'])
+    async def retrace(self, ctx: Context, *, link: str):
+        found = set()
+        history = []
+        async with ClientSession() as sess:
+            while link not in found:
+                async with sess.get(link, allow_redirects=False) as res:
+                    res: ClientResponse
+                    found.add(res.url)
+                    if res.status // 100 == 3:
+                        history.append(('header', res.url))
+                        link = res.headers['Location']
+                        continue
+                    soup = BeautifulSoup((await res.text()), 'html5lib')
+                    el = soup.find('meta', attrs={'http-equiv': 'refresh'})
+                    if el:
+                        history.append(('meta', res.url))
+                        link = el['content'].split('=')[1]
+                        continue
+                    break
+        text = '\n'.join([f'{re[0]} - {re[1]}' for re in history] + [f'Final - {link}'])
+        await ctx.send(
+            embed=Embed(
+                description=text
+            ))
+
+
+def setup(bot: Bot):
+    bot.add_cog(Link(bot))