Postman实现jwt发送请求

javascript 复制代码
// Pre-request script
// 使用 CryptoJS（Postman 通常内置这个）
const generateJWT = () => {
    const issuer = "example.com";
    const secret = "secret_key";
    console.log("Generating JWT with issuer:", issuer);
    
    // Header
    const header = {
        "alg": "HS256",
        "typ": "JWT"
    };
    
    // Payload
    const payload = {
        "iss": issuer,
        "exp": Math.floor(Date.now() / 1000) + 3600,
        "iat": Math.floor(Date.now() / 1000),
        "sub": "postman-test",
        "name": "test"
    };
    
    try {
        // 方法2A: 使用 CryptoJS（如果可用）
        const base64Header = btoa(JSON.stringify(header)).replace(/\+/g, '-').replace(/\//g, '_').replace(/=+$/, '');
        const base64Payload = btoa(JSON.stringify(payload)).replace(/\+/g, '-').replace(/\//g, '_').replace(/=+$/, '');
        
        const data = base64Header + "." + base64Payload;
        
        // 简单的HMAC-SHA256实现
        const signature = CryptoJS.HmacSHA256(data, secret);
        const base64Signature = CryptoJS.enc.Base64.stringify(signature)
            .replace(/\+/g, '-')
            .replace(/\//g, '_')
            .replace(/=+$/, '');
        
        const token = data + "." + base64Signature;
        
        pm.environment.set("jwt_token", token);
        console.log("JWT生成成功:", token);
        return token;
        
    } catch (error) {
        console.log("CryptoJS方法失败:", error);
        
        // 方法2B: 使用纯JavaScript的简单实现（用于测试）
        const simpleToken = generateSimpleJWT(header, payload, secret);
        pm.environment.set("jwt_token", simpleToken);
        console.log("使用简单方法生成的JWT:", simpleToken);
        return simpleToken;
    }
};

// 简单的JWT生成函数（用于测试）
function generateSimpleJWT(header, payload, secret) {
    const base64Header = btoa(JSON.stringify(header))
        .replace(/\+/g, '-')
        .replace(/\//g, '_')
        .replace(/=+$/, '');
    
    const base64Payload = btoa(JSON.stringify(payload))
        .replace(/\+/g, '-')
        .replace(/\//g, '_')
        .replace(/=+$/, '');
    
    // 注意：这是一个简化的签名，仅用于测试
    const fakeSignature = "test_signature_only_for_debugging";
    
    return base64Header + "." + base64Payload + "." + fakeSignature;
}

// 生成JWT
generateJWT();
设置headers
key jwt
value {{jwt_token}}