Python calls the Alibaba Cloud interface to implement the verification code generation function

Python calls the Alibaba Cloud interface to implement the verification code generation function

Verification code (CAPTCHA) is a technology used to verify user identity and is often used when developing web applications. Alibaba Cloud provides a powerful human-machine verification service. By calling the Alibaba Cloud interface, we can generate and verify verification codes.

First, we need to create and configure the human-computer authentication product on the Alibaba Cloud management console and obtain the Access Key and Secret Key. Then, we can use the aliyun-python-sdk-afs package in Alibaba Cloud SDK to call the corresponding interface.

Next, let us implement a web application based on the Flask framework and demonstrate how to call the Alibaba Cloud interface to generate a verification code.

from flask import Flask, render_template, request, jsonify
from aliyunsdkafs.request.v20180112 import CreateVerifyCodeRequest, GetVerifyTokenRequest
from aliyunsdkcore.client import AcsClient
import json

# 替换成你的Access Key和Secret Key
access_key = <your_access_key>
secret_key = <your_secret_key>
# 替换成你的阿里云区域
region_id = 'cn-hangzhou'

# 初始化AcsClient
client = AcsClient(access_key, secret_key, region_id)

app = Flask(__name__)


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


@app.route('/verify_code', methods=['POST'])
def verify_code():
    # 获取前端请求的数据
    data = request.get_json()
    session_id = data.get('sessionId')
    sig = data.get('sig')
    token = data.get('token')

    # 创建一个用于生成验证码的请求对象
    request = CreateVerifyCodeRequest.CreateVerifyCodeRequest()
    # 设置验证场景，例如登录、注册等
    request.set_Scn('nc_login')

    # 设置传递给防刷接口的参数
    request.set_SessionId(session_id)
    request.set_Sig(sig)
    request.set_Token(token)

    # 发出请求，并获取响应
    response = json.loads(client.do_action_with_exception(request))
    if response['Code'] == '100':
        # 验证码生成成功
        return jsonify({'success': True, 'data': response['Data']})
    else:
        # 验证码生成失败
        return jsonify({'success': False, 'msg': response['Msg']})


if __name__ == '__main__':
    app.run(debug=True)

In the above code, we use the Flask framework to create a web application. When accessing the homepage, a template named index.html will be rendered. When calling the /verify_code interface, parameters such as sessionId, sig, and token will be obtained from the front-end request, and the Alibaba Cloud interface will be called Generate verification code. If the verification code is generated successfully, we return it to the front end; if it fails, we return error information to the front end.

In the index.html template, we created a simple form that contains a hidden input tag to store the sessionId generated by Alibaba Cloud. When the user submits the form, the JavaScript code will be triggered to obtain parameters such as sig and token from the Alibaba Cloud interface and submit them to the backend.

The above is the sample code that uses Python to call the Alibaba Cloud interface to implement the verification code generation function. By calling Alibaba Cloud's human-machine verification service, we can effectively prevent malicious access by robots and ticket fraud, and improve the security of web applications.

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