first version

app.py

@@ -0,0 +1,29 @@
+from flask import Flask, render_template, abort
+import requests
+
+
+app = Flask(__name__)
+
+
+@app.route("/")
+def index_page():
+    return render_template("index.html")
+
+
+@app.errorhandler(404)
+def errorhandler_page(_):
+    return render_template("4O4.html"), 404
+
+
+@app.route("/<int:cid>/")
+def viewer_page(cid):
+    user = requests.get(f"https://api.vatsim.net/v2/members/{cid}").json()
+
+    if "detail" in user and user["detail"] == "Not Found":
+        return abort(404)
+
+    return render_template("viewer.html", data=(user, ))
+
+
+if __name__ == "__main__":
+    app.run(debug=True)