Flask新手技术咨询：如何获取请求字段并处理后连同额外值POST至其他URI

Hey there! Let's break this down step by step since you're already off to a good start with grabbing the age field. I'll walk you through defining the age-processing function and sending the POST request to another URI.

First, a quick fix to your current code:

• request.get_json is a method, so you need to call it with parentheses: request.get_json()
• Your route should start with a slash: @app.route('/link', methods=['GET','POST'])
• Adding basic error handling will prevent crashes if the age field is missing.

Step 1: Define your age-processing function #

Let's create a simple, customizable function that takes the age value and generates your desired extra value. For example, we could calculate the birth year (assuming current year is 2024) or double the age—adjust this logic to fit your needs:

def process_age(age):
    # Example 1: Calculate birth year
    birth_year = 2024 - age
    # Example 2: Double the age (swap this in if needed)
    # doubled_age = age * 2
    return birth_year

Step 2: Send POST request to another URI #

To send data to an external endpoint, we'll use the requests library (install it first with pip install requests). We'll build a payload that includes both the original age and our processed extra value, then send it via POST.

Full Working Code #

Here's everything put together with robustness improvements:

from flask import Flask, request
import requests

app = Flask(__name__)

# Custom age processing function - tweak this to your use case!
def process_age(age):
    return 2024 - age  # Returns birth year as the extra value

@app.route('/link', methods=['POST'])  # Focus on POST since we're handling incoming data
def handle_request():
    # Fetch incoming JSON data
    data = request.get_json()
    
    # Validate the request has the 'age' field
    if not data or 'age' not in data:
        return "Missing 'age' field in request", 400
    
    original_age = data['age']
    # Generate the extra value using our function
    extra_value = process_age(original_age)
    
    # Build the payload to send to the target URI
    payload = {
        'original_age': original_age,
        'extra_value': extra_value,
        # Uncomment below to include other original fields if needed
        # 'phone_number': data.get('phone_number'),
        # 'name': data.get('name'),
        # 'gender': data.get('gender')
    }
    
    # Replace this with your actual target URI
    target_uri = "https://your-target-endpoint.com/receive-data"
    
    try:
        # Send the POST request to the target
        response = requests.post(target_uri, json=payload)
        # Raise an error if the target returns an HTTP error code
        response.raise_for_status()
        return f"Data sent successfully! Target response: {response.text}", 200
    except requests.exceptions.RequestException as e:
        # Handle any issues with sending the request
        return f"Failed to send data: {str(e)}", 500

if __name__ == "__main__":
    app.run(port=2000, debug=True)

Key Tips: #

• Customize process_age: Swap the birth year logic with whatever calculation you need (e.g., age eligibility, category grouping, etc.).
• Include other fields: If you want to forward the full original request data to the target URI, just add those fields to the payload dictionary.
• Debug mode: With debug=True, Flask will auto-reload when you edit code—perfect for testing changes quickly.

内容的提问来源于stack exchange，提问作者Mee