Postman（Pre-request Script）构建请求之前的操作

Postman（Pre-request Script）构建请求之前的操作

一、发送GET请求

有时候我们需要在请求之前进行某些操作，比如登录并获取token，然后才能正常执行查询操作，否则会报授权问题。所以我们可以在Pre-request Script中编写我们需要进行的前置操作。如图：

get请求的参考代码如下：

// 获取当根路由地址
var host_url = pm.environment.get("url");

// 构建get请求
const getRequest = {
  url: host_url+"/sys/get",
  method: 'GET'
  };
//发送请求 
pm.sendRequest(getRequest, (err, response) => {
    if (err) {
        console.log(err);
    } else {
        //设置环境变量
        pm.environment.set("accessToken", response.json()['accessToken']);
        console.log(response.json()['accessToken'])
    }
});

二、发送POST请求

1、content-type为json格式

// 获取当根路由地址
var host_url = pm.environment.get("url");

// 登录用户名及密码
var data = {
	        "userId": "XXX",
	        "password": "XXX"
        }
        
// 构建请求
const postRequest = {
  url: host_url+"/sys/login",
  method: 'POST',
  header:'Content-Type:application/json',
  body:{
      mode: 'raw',
      raw: JSON.stringify(data)
  }};
  
//发送请求
pm.sendRequest(postRequest, function (err, response) {
    console.log(response.json());
    //设置环境变量
    pm.environment.set("accessToken", response.json()['accessToken']);
});

2、content-type为x-www-form-urlencoded格式

// 获取当根路由地址
var host_url = pm.environment.get("url");

// 登录用户名及密码
var data = {
	        "userId": "XXX",
	        "password": "XXX"
        }
        
// 构建请求        
const postRequest = {
  url: host_url+"/sys/login",
  method: 'POST',
  header:'Content-Type:application/x-www-form-urlencoded',
  body: {
    mode: 'x-www-form-urlencoded',
    raw: "organCode=10000062"
  }};
  
//发送请求
pm.sendRequest(postRequest, (err, response) => {
    if (err) {
        console.log(err);
    } else {
        console.log(response.json());
    }
});

或者

// 获取当根路由地址
var host_url = pm.environment.get("url");

// 登录用户名及密码
var data = {
	        "userId": "XXX",
	        "password": "XXX"
        }
        
// 构建请求   
const postRequest = {
  url: host_url+"/sys/login",
  method: 'POST',
  header:'Content-Type:application/x-www-form-urlencoded',
  body: {
    mode: 'urlencoded',
    urlencoded: "organCode=10000062"
  }};
pm.sendRequest(postRequest, (err, response) => {
    if (err) {
        console.log(err);
    } else {
        console.log(response.json());
    }
});

三、参考

https://learning.postman.com/docs/writing-scripts/pre-request-scripts/

https://www.testwo.com/blog/8512

https://www.cnblogs.com/shadow-yin/p/10621406.html