initial commit

.gitignore

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+.idea
+venv
+
+__pycache__
+*.py[cod]
+

extension/README.md

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+# Unshorten
+A Firefox extension to unshorten links from sites like Twitter.

extension/unshorten/background.js

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+const shortenerDomains = [
+    "t.co"
+];
+
+browser.contextMenus.create({
+        id: "unshorten-link",
+        title: "Unshorten link",
+        contexts: ["link"],
+    },
+    // See https://extensionworkshop.com/documentation/develop/manifest-v3-migration-guide/#event-pages-and-backward-compatibility
+    // for information on the purpose of this error capture.
+    () => void browser.runtime.lastError,
+);
+
+browser.contextMenus.onClicked.addListener((info, tab) => {
+    if (info.menuItemId === "unshorten-link") {
+        const linkUrl = info.linkUrl;
+        const linkDomain = getDomainFromUrl(linkUrl);
+        const canShorten = shortenerDomains.includes(linkDomain);
+
+        if (canShorten) {
+            unshortenUrl(linkUrl);
+        }
+    }
+});
+
+function getDomainFromUrl(linkUrl) {
+    const url = new URL(linkUrl);
+    return url.hostname;
+}
+
+function unshortenUrl(linkUrl) {
+    console.log(linkUrl);
+
+    fetch("http://localhost:8000/?url=" + linkUrl)
+    .then(res => {
+        if (res.ok) {
+            console.log(res);
+        }
+    });
+}

extension/unshorten/manifest.json

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+{
+  "manifest_version": 2,
+  "name": "Unshorten",
+  "version": "0.1",
+
+  "description": "Unshorten links from Twitter.",
+
+  "icons": {
+    "48": "icons/border-48.png"
+  },
+
+  "background": {
+    "scripts": [
+      "background.js"
+    ],
+    "persistent": false
+  },
+
+  "permissions": [
+    "activeTab",
+    "contextMenus"
+  ]
+}

server/README.md

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+# Unshorten Server
+Simple FastAPI app to unshorten URLs.

server/requirements.txt

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+fastapi
+uvicorn[standard]

server/src/main.py

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+from fastapi import FastAPI
+from fastapi.middleware.cors import CORSMiddleware
+from typing import Optional
+from urllib.parse import urlparse
+
+SHORTEN_DOMAINS = [
+    't.co'
+]
+
+app = FastAPI(docs_url=None, redoc_url=None)
+
+app.add_middleware(
+    CORSMiddleware,
+    allow_origins=["*"],
+    allow_methods=["GET"]
+)
+
+
+@app.get('/')
+async def shorten_url(url: Optional[str] = None):
+    if url is None:
+        return {"error": "no url provided"}
+
+    domain = urlparse(url).netloc
+
+    if domain in SHORTEN_DOMAINS:
+        return {"result": "shortened url"}
+    else:
+        return {"error": f"cannot shorten {url}"}