I am still very new to Python, just know some basic stuff bout it. I have built a small web application that takes input from a web server and sends it to the backend, which stores everything in a database. Everything is already running so far (via Docker), but when I want to make an entry, I get the following error message back (i guess my webserver got some issues):
[![404 post issue][1]][1]
i went through frontend to backend and looked over my post method - but it seems ok for me. Or am i blind to see the issue?
I will post the Code below, so u can see what i mean :)
<body>
<h1>Willkommen in der Test App</h1>
<form action="/api/data" method="POST">
<label for="inputText">Text eingeben:</label>
<input
type="text"
id="inputText"
name="inputText"
placeholder="z.B. Hallo Welt"
/>
<button type="submit">Absenden</button>
</form>
Middleware Code:
from flask import Flask, request, jsonify
app = Flask(__name__)
@app.route('/categorize', methods=['POST'])
def categorize():
data = request.get_json()
input_text = data.get("inputText", "").lower()
if "error" in input_text:
category = "Error"
else:
category = "General"
return jsonify({"category": category}), 200
if __name__ == '__main__':
app.run(host='0.0.0.0', port=6000, debug=True)
And the POST method in my Backend Code:
@app.route('/api/data', methods=['POST'])
def receive_data():
input_text = request.form.get('inputText')
if not input_text:
return "Fehlender 'inputText' im Formular.", 400
try:
# An Middleware schicken zur Kategorisierung
response = requests.post("http://middleware:6000/categorize",
json={
"inputText": input_text
})
if response.status_code != 200:
return "Fehler in Middleware-Antwort", 500
category = response.json().get("category", "Unkown")
conn = psycopg2.connect(**db_config)
cur = conn.cursor()
insert_query = "INSERT INTO requests (text, category) VALUES
(%s, %s);"
cur.execute(insert_query, (input_text, category))
conn.commit()
cur.close()
conn.close()
return f"Eingegangen und gespeichert: '{input_text}' mit
Kategorie '{category}'", 200
except Exception as e:
return f"Fehler bei der Verarbeitung: {str(e)}", 500
This is my default.conf file:
server {
listen 80;
server_name localhost;
# Statische Dateien (HTML, CSS, JS)
location / {
root /usr/share/nginx/html;
index index.html;
}
# Proxy für alle API-Aufrufe => Backend
location /api/ {
proxy_pass http://backend:5000/;
proxy_http_version 1.1;
proxy_set_header Host $host;
}
}
my url after the post is: http://localhost/api/data
Hope someone can give a nice hint to fix it :)
http://localhost/api/datashould behttp://localhost:6000/api/datato match theporthereapp.run(host='0.0.0.0', port=6000, debug=True). FYI, I would sethost=localhost, running on0.0.0.0seems overly permissive.