@app.route("/read")
def read_file():
    filename = request.args.get("filename")
    if not filename:
        return "Missing 'filename' parameter", 400
    try:
        with open(filename, "r") as f:
            content = f.read()
            return f"<pre>{content}</pre>"
    except Exception as e:
        return f"Error: {str(e)}", 500

if __name__ == "__main__":
    app.run(host="0.0.0.0", port=80)

import flask
import requests

app = flask.Flask(__name__)


@app.route("/route/to/resource/<resource_id>")
def resource1(resource_id):
    with open(resource_id) as f:
        pass
    with open(f"/path/to/{resource_id}") as f:
        pass
    with open("/path/to/{0}".format(resource_id)) as f:
        pass
    with open("/path/to/{0}".other(resource_id)) as f:
        pass

@app.route("/route/to/resource/<resource_id>")
def resource2(resource_id):
    file1 = open(resource_id)
    file2 = open(f"/path/to/{resource_id}")
    file3 = open("/path/to/{0}".format(resource_id))


@app.route("/route/to/resource")
def resource2():
    resource_id = flask.request.args.get("resource_id")
    file1 = open(resource_id)
    file2 = open(f"/path/to/{resource_id}")
    file3 = open("/path/to/{0}".format(resource_id))

from flask import Flask, request, render_template


app = Flask(__name__, static_url_path='/static', static_folder='static')
app.config['DEBUG'] = True


@app.route("/")
def start():
    return render_template("index.html")

import flask
import requests

app = flask.Flask(__name__)

@app.route("/route/to/resource/<resource_id>")
def resource2(resource_id):
    sanitized_resource_id = sanitize(resource_id)
    file1 = open(sanitized_resource_id)