Postman pre script - global variables and environment variables

Global and environment variables

Global variables

• Concept ： stay Postman Globally effective variables , Globally unique .

• Set up ：

  • Code settings ：pm.globals.set(“ Global variable name ”, The value of the global variable )

    //  Example ：
    pm.globals.set("glb_age", 100)
    

• obtain ：

  • Code acquisition : var The variable that receives the value = pm.globals.get(“ Global variable name ”)

    //  Example ：
    var ret = pm.globals.get("glb_age")  // ret  The value of is  100
    

  • Request parameter acquisition （postman Interface access ）: { { Global variable name }}

    //  Example ：
    {
            {
            glb_age}}
    

environment variable

• Concept ： stay Specific circumstances （ Production environment 、 development environment 、 Test environment ） Next , Variables in effect , Only in this environment .

• Set up ：

  • Code settings ：pm.environment.set(" Environment variable name ", Environment variable value )

    //  Example 
    pm.environment.set("env_age", 99)
    

• obtain ：

  • Code acquisition ：var The variable that receives the value = pm.environment.get(" Environment variable name ")

    //  Example 
    var ret = pm.environment.get("env_age")  // ret  The value of is  99
    

  • Request parameter acquisition （postman Interface access ）：{ { Environment variable name }}

    //  Example 
    {
            {
            env_age}}
    

Postman Request pre script

• stay send When the button is clicked , Request pre script code , Be executed at the first time . stay postman Internal reality http Request before .

hypothesis , Such a scene ：

​ When adjusting an interface , To input “ Time stamp ”, If you enter “ Time stamp ” The absolute value of , Beyond the standard time 10 minute . Call... Is not allowed .

Time stamp

• Time stamp ： Corresponding to absolute time , from 1970 year 1 month 1 Japan 00:00:00 Up to now Seconds experienced .

One day ：86400 second

51 year 6 month （180） 9 God — 1,624,665,600 second

Case study

Call Baidu homepage interface , Send timestamp to server

Implementation steps ：

1. stay Pre-request Script On the tab , Add code . Get the time stamp , Write global variables

   //  Get the time stamp 
   var timestamp = new Date().getTime()
   
   //  Set the timestamp to   Global variables 
   pm.globals.set("glb_timestamp", timestamp)
   

2. Click on Send Button , Send a request . Execute before sending the request The above code . Write global variables

3. View the variables written

4. stay Request parameters ( Interface ) in , Use global variables .{ { Global variable name }}

5. stay postman Of Console , see Sent http request
   

working principle