Snippet Code

1. What's it?
A collection of snippet Javascript code for the Scripting Tool.
Could not find the Snippet Code you are looking for? 
Please open a ticket at https://github.com/ProxymanApp/Proxyman, we will get back to help you ⭐️
2. Common on Request and Response
​Update Headers of Request or Response​
​Update Request Query​
​Update URLEncoded Form Request Body​
​Update JSON Request or Response Body​
​Map a local file to Response's Body like Map Local Tool​
​Change Request Scheme, Host, Port, Path​
​HTTP to HTTPS​
​HTTPS to HTTP​
​Change Request Method​
​Change Response Status Code​
​Logging​
​Use JSON File as a Body of Request or Response​
​Use multiple JSON files​
​Local Map for GraphQL​
​Use ArrayBuffer in Request/Response Body​
​Preserve the Host​
​Comment & Highlight with color​
3. Addons 
​Base64 Encoding/Decoding or atob/btoa​
​Hashing Addon (MD5, SHA1, SHA256, SHA512)​
​UUIDv4 Generator​
​Deflate/Inflate or GZip/UnGZip​
​JWT Decode​
4. Regex 
​Check if a given string contains only numbers​
5. Import / Export Files
​Import JSON File​
​Import Binary Data (Image)​
​Import Text-based file (css, html, js....)​
​Import Files without using the "Import Tool"​
​Write / Export to a local file​
​Use Response as Mock API​
6. Miscellaneous
​By-pass CORS​
​Inject a Header to the Request or Response​
​Response delay with sleep() function​
7. Encryption/Decryption
​AES 
​DES​
8. Map Remote with Scripting
​Map v1 to v2 Endpoints​
​Map Localhost to Production​
​Map Production to Localhost​
9. Make Async/await HTTP Request
​GET Request with Query​
​POST Request with JSON Body​
​POST Request with application/x-www-form-urlencoded​
​PUT / PATCH / DELETE Request​
HTTP Header
Add/Update: Request or Response Header
function onRequest(context, url, request) {
    // Add or update Request Header
    request.headers["X-Proxyman-Key"] = "My-Value";
    request.headers.name = "Proxyman";
    return request;
}
​
function onResponse(context, url, request, response) {
    // Add or update Response Header
    response.headers["X-Proxyman-Key"] = "My-Value";
    response.headers.id = 100;
    return response;
}
Delete: Request or Response Header
function onRequest(context, url, request) {
    delete request.headers["X-Proxyman-Key"];
    return request;
}
​
function onResponse(context, url, request, response) {
    delete response.headers["X-Proxyman-Key"];
    return response;
}
​
Request Query
Add/Update
function onRequest(context, url, request) {
    request.queries["name"] = "Proxyman";
    request.queries["platform"] = "macOS";
    // => http://proxyman.io?name=Proxyman&platform=macOS
    return request;
}
Delete
function onRequest(context, url, request) {
    delete request.queries["name"];
    delete request.queries["platform"];
    return request;
}
​
URLEncoded Form Body
Add/Update
function onRequest(context, url, request) {
    // Make sure the Response Header is application/x-www-form-urlencoded
    // Content-Type: application/x-www-form-urlencoded   
    var formBody = request.body;
​
    formBody["name"] = "Proxyman";
    formBody["flatform"] = "macOS";
​
    request.body = formBody; // => name=Proxyman&platform=macOS
    return request;
}
​
Delete 
function onRequest(context, url, request) {
    // Content-Type: application/x-www-form-urlencoded
    var formBody = request.body;
​
    delete formBody["name"];
    delete formBody["flatform"];
​
    request.body = formBody;
    return request;
}
​
Change Request Destination (scheme, host, port, path)
function onRequest(context, url, request) {
    request.scheme = "http";
    request.host = "proxyman.dev";
    request.port = 9090;
    request.path = "v1/data/user";
    return request;
}
HTTP to HTTPS
function onRequest(context, url, request) {
    request.scheme = "http";
    request.port = 80; // Don't forget to override the port
    return request;
}
HTTPS to HTTP
function onRequest(context, url, request) {
    request.scheme = "https";
    request.port = 443; // Don't forget to override the port
    return request;
}
Change HTTP Request Method
function onRequest(context, url, request) {
    request.method = "POST";
    return request;
}
Change Response HTTP Status Code
function onResponse(context, url, request, response) {
    response.statusCode = 404;
    return response;
}
JSON Body
On Request
function onRequest(context, url, request) {
    // Set JSON content
    request.headers["Content-Type"] = "application/json";
    
    // Get Request body
    var jsonBody = request.body;
    
    // Modify data
    jsonBody["name"] = "Proxyman";
    jsonBody["flatform"] = "macOS";
    jsonBody["info"] = { 
                        "website": "proxyman.io",
                        "region": "Earth"
                       };
    // Set it again        
    request.body = jsonBody;
    return request;
}
On Response
function onResponse(context, url, request, response)  {
    // Set JSON content
    response.headers["Content-Type"] = "application/json";
  
    // Get Request body
    var jsonBody = response.body;
    
    // Modify data
    jsonBody["name"] = "Proxyman";
    jsonBody["flatform"] = "macOS";
    jsonBody["info"] = { 
                        "website": "proxyman.io",
                        "region": "Earth"
                       };
    // Set it again        
    response.body = jsonBody;
    return response;
}
​
Map a local file to Response's Body like Map Local Tool (Proxyman 2.25.0+)
It's a convenient way to directly set a local file to a Body by using bodyFilePath property
// For request
request.bodyFilePath = "~/Desktop/image.png";
​
// For response
response.bodyFilePath = "~/Desktop/image.png";
function onResponse(context, url, request, response) {
 
  response.headers["Content-Type"] = "image/png";
  response.bodyFilePath = "~/Desktop/image.png";
 
  // Done
  return response;
}
function onResponse(context, url, request, response) {
 
  response.headers["Content-Type"] = "application/json";
  response.bodyFilePath = "~/Desktop/my_response.json";
 
  // Done
  return response;
}
Use JSON File as a Body of Request or Response
It's possible to use your JSON file and set it as a Request/Response's body
Please follow this tutorial.
Use multiple JSON files
You can use set a different body for each matching endpoint by using the IF statement.
1.Follow this tutorial to understand how to import a JSON file to the script
2.Set Script Rule with wildcard or Regex pattern that can match many endpoints. E.g https://my-domain.com/v*
3.Use `includes()` to check whether or not the endpoint is matched
const file_1 = require("@users/myfile_1.json");
const file_2 = require("@users/myfile_2.json");
const file_3 = require("@users/myfile_3.json");
​
function onResponse(context, url, request, response) {
  
  // Set JSON content
  response.headers["Content-Type"] = "application/json";
  
  // Check
  if (url.includes("v1/data")) {
    response.body = file_1
  } else if (url.includes("v2/login")) {
      response.body = file_2
  } else if (url.includes("v3/user")) {
      response.body = file_3
  }
​
  // Done
  return response;
}
Map Local with GraphQL
Read more at https://github.com/ProxymanApp/Proxyman/issues/412#issuecomment-697101594​
// Import your JSON file here 
const file = require("@users/B02D96D5.default_message_32E64A5B.json");
​
function onRequest(context, url, request) {
​
  // 1. Extract the queryName from the request
  var queryName = request.body.query.match(/\S+/gi)[1].split('(').shift();
​
  // 2. Save to sharedState
  sharedState.queryName = queryName
​
  // Done
  return request;
}
​
function onResponse(context, url, request, response) {
​
  // 3. Check if it's the request we need to map
  if (sharedState.queryName == "user") {
    
    // 4. Import the local file by Action Button -> Import
    // Get the local JSON file and set it as a body (like Map Local)
    response.headers["Content-Type"] = "application/json";
    response.body = file;
  }
​
  // Done
  return response;
}
Use ArrayBuffer in Request/Response Body
Since Javascript doesn't have the Data object type, the Data Body will convert to Base64 Encoded String in Javascript. To pass Uint8Array, blob, or ArrayBuffer to the body, make sure you convert to Base64 Encoded String and set the ContentType to application/octet-stream
Proxyman will convert Base64 Encoding to ArrayBuffer, so the client will receive the data properly. 
// Import
const { btoa } = require('@addons/Base64.js');
​
function onResponse(context, url, request, response) {
  // Construct the ArrayBuffer
  const buffer = new ArrayBuffer(256)
  const view = new Uint8Array(buffer)
  for (let i = 0; i < view.length; i++) {
    view[i] = i
  }
  
  // Convert ArrayBuffer to Base64String
  var newBody = btoa(String.fromCharCode.apply(null, new Uint8Array(buffer)));
  
  // Set new body
  response.body = newBody;
  response.statusCode = 200
  response.headers['Content-Type'] = 'application/octet-stream'
​
  // Done
  return response;
}
Preserve the Host
function onRequest(context, url, request) {
    request.preserveHostHeader = true
    return request
}
Comment & Highlight with color
Use comment or color to highlight on the main table view.
function onRequest(context, url, request) {
    request.comment = "It's a Request"
    request.color = "red" // red, blue, yellow, purple, gray, green
    return request
}
​
function onResponse(context, url, request, response) {
    response.comment = "It's a Response"
    response.color = "yellow" // red, blue, yellow, purple, gray, green
    return response
}
Use Scripting for Color and Comment
Import Files with require()
JSON
1.Prepare a JSON file and save it to your Desktop
// myfile.json
{
  "name": "Proxyman",
  "platform": "macOS",
  "info": {
    "website": "proxyman.io",
    "region": "Earth"
  }
}
2. More -> Import JSON or Other Files. Then selecting your file 
3. Proxyman will add the import code to the top of the script
// ~/Library/Application Support/com.proxyman.NSProxy/users/myfile.json
const file = require("@users/myfile.json");
​
function onResponse(context, url, request, response) {
  // 1. Set header to JSON if need
  response.headers["Content-Type"] = "application/json";
​
  // 2. Set Body as a imported file
  response.body = file;
  
  return response;
}
The selected file is copied to ~/Library/Application\ Support/com.proxyman.NSProxy/users folder.
To support other format files, such as image, text, pdf. Make sure you have correct Header Content-Type
Binary File
1.Follow the same above instruction (Select your Binary File)
2.Set it as a body
// ~/Library/Application Support/com.proxyman.NSProxy/users/myscreenshot.png
const file = require("@users/myscreenshot.png");
​
function onResponse(context, url, request, response) {
  // Set header
  response.headers["Content-Type"] = "image/png";
​
  // Set Body
  response.body = file;
  
  return response;
}
Text-Based File
1.Follow the same above instruction (Select your Binary File)
2.Set it as a body
// ~/Library/Application Support/com.proxyman.NSProxy/users/main.css
const file = require("@users/main.css");
​
function onResponse(context, url, request, response) {
  // Set header
  response.headers["Content-Type"] = "text/css";
​
  // Set Body
  response.body = file;
  
  return response;
}
Import File without using the "Import Tool"
From Proxyman 2.24.0+, you can import any files without using the "Import File".
// Import your file from your Desktop folder
const file = require("~/Desktop/myfile.json");
​
function onResponse(context, url, request, response) {
​
  // 1. Set header to JSON if need
  response.headers["Content-Type"] = "application/json";
​
  // 2. Set Body as a imported file
  response.body = file;
  
  return response;
}
If the file has ".js" as an extension => Proxyman will execute it as a JS Script
Otherwise, Proxyman will import it as normal
Only files that are imported by using the "Import Tool", are included when exporting the script to your colleague.
Use as Mock API
You can use Scripting as a Mock API by following this guideline.
Using Addons
​Full list of built-in addons​
Use Base64 Addon
// Encode Base64
const { btoa } = require("@addons/Base64.js")
​
// Usage:
var text = "HelloWorld";
var encodedText = btoa(text);
// Decode Base64
const { atob } = require("@addons/Base64.js")
​
// Usage:
var text = atob("aGVsbG8=");
Use Hashing Addon (MD5, SHA1, SHA256, SHA512)
// Hash MD5
const { md5 } = require("@addons/MD5.js")
​
// Usage:
var hashedText = md5("Hello World");
// Hash SHA1
const { sha1 } = require("@addons/SHA1.js")
​
// Usage:
var hashedText = sha1("Hello World");
Use UUID-v4 Addon
// Hash MD5
const { uuidv4 } = require("@addons/UUID.js")
​
// Usage:
var uuid = uuidv4();
Deflate/Inflate and GZip/UnGZip
Deflate/inflate
const { inflate, deflate } = require("@addons/Pako.js")
​
// Compress
var input = "Hello World from Pako!!!"
var result = deflate(input);
console.log(result); // eJzzSM3JyVcIzy/KSVFIK8rPVQhIzM5XVFQEAGsMB/8=
​
// Decompress
var text = 'eJzzSM3JyVcIzy/KSVFIK8rPVQhIzM5XVFQEAGsMB/8=';
var rawText = inflate(text);
console.log(rawText); // Hello World from Pako!!!
GZip/UnGZip
const { ungzip, gzip } = require("@addons/Pako.js")
​
// Compress
var text =  'HelloWorld';
var result = gzip(text);
console.log(result); // H4sIAAAAAAAAA/NIzcnJD88vykkBAHkMd3cKAAAA
​
// Decompress
var text =  'H4sIAAAAAAAAA/NIzcnJD88vykkBAHkMd3cKAAAA';
var rawText = ungzip(text);
console.log(rawText); // HelloWorld
JWT Decode
const { jwtDecode } = require('@addons/JWTDecode.js');
​
var text = 'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiaWF0IjoxNTE2MjM5MDIyfQ.SflKxwRJSMeKKF2QT4fwpMeJf36POk6yJV_adQssw5c';
var jSONObject = jwtDecode(text)
Logging
// Print the obj
const myObj = {};
console.log(myObj);
​
// Print type of the obj
console.log(typeof(myObj));
Regex
Only number
//Init Regex
var reg = /^-?\d*\.?\d*$/;
​
if (reg.test("123123123")) {
    console.log("Matched");
}
Miscellaneous
By-pass CORS 
function onResponse(context, url, request, response) {  
​
  // Allow all
  response.headers["Access-Control-Allow-Origin"] = "*";
​
  // Done
  return response;
}
Inject Header to Request / Response 
function onRequest(context, url, request) {
  // add header
  request.headers["My-Injected-Header"] = "Proxyman";
  return request
}
​
function onResponse(context, url, request, response) {    
  // add header
  response.headers["My-Injected-Header"] = "Proxyman";
  return response;
}
​
Response delay with sleep() function
It's useful for simulating the "Slow Network" on a particular Request or Response. You can check out the Network Conditions tool for GUI.
function onResponse(context, url, request, response) {
  console.log("Start sleep");
  
  // Sleep 5 seconds
  sleep(5000);
  
  // Done
  return response;
}
AES Encryption/Decryption
const { encryptAES, decryptAES } = require("@addons/CryptoJS.js")
​
function onRequest(context, url, request) {
  
  // Encrypt
  var message = 'my message from Proxyman';
  var password = 'secret key 123';
  var ciphertext = encryptAES(message, password);
  
  // Decrypt
  var originalText = decryptAES(ciphertext, password);
​
  // Done
  return request;
}
DES Encryption/Decryption
const { encryptDES, decryptDES } = require("@addons/CryptoJS.js")
​
function onRequest(context, url, request) {
  
  // Encrypt
  var message = 'my message from Proxyman';
  var password = 'secret key 123';
  var ciphertext = encryptDES(message, password);
  
  // Decrypt
  var originalText = decryptDES(ciphertext, password);
​
  // Done
  return request;
}
Write / Export to a local file
Override Mode
function onResponse(context, url, request, response) {
​
  // Write to single file
  writeToFile(response.body, "~/Desktop/body.json");
  
  // Write the Body to file with flow ID
  writeToFile(response.body, "~/Desktop/sample-" + context.flow.id);
  
  // Done
  return response;
}
Append Mode (Only for Proxyman 3.6.2+)
async function onResponse(context, url, request, response) {
​
  // Append to the existed file
  // Or create a new file if it doesn't exist
  var opt = {appendFile: true}
  writeToFile(response.body, "~/Desktop/body.json", opt);
​
  // Done
  return response;
}
Map Remotes
Map v1 to v2 endpoints
function onRequest(context, url, request) {
  
  // Replace v1 to v2 in URL Path
  var newPath = request.path.replace("v1", "v2");
  request.path = newPath
​
  // Done
  return request;
}
Map localhost to production
function onRequest(context, url, request) {
  
  // Use production URL
  request.scheme = "https";
  request.host = "proxyman.io";
  request.port = 443;
​
  // Done
  return request;
}
Map production to localhost
function onRequest(context, url, request) {
  
  // Use production URL
  request.scheme = "http";
  request.host = "localhost";
  request.port = 3000;
​
  // Done
  return request;
}
Make async/await HTTP Request
See async/await HTTP Request Document.
GET Request with Query
async function onResponse(context, url, request, response) {  
  // GET Request with Query
  var url = "https://httpbin.org/get?id=proxyman&country=united%20states";
  var output = await $http.get(url);
  
  // Get Status Code
  console.log(output.statusCode);
  
  // Get body
  console.log(output.body)
  
  // Get header
  console.log(output.headers)
  
  // Done
  return response;
}
POST Request with JSON Body
async function onResponse(context, url, request, response) {  
  // Define JSON Body and Header
  // Make sure "Content-Type" is "application/json"
  var param = {
    body: {
      "user": {
        "name": "Proxyman"
      }
    },
    headers: {
      "Content-Type": "application/json"
    }
  }
​
  // POST request with await
  var output = await $http.post("https://httpbin.org/post", param);
  
  // Get Status Code
  console.log(output.statusCode);
  
  // Get body
  console.log(output.body)
  
  // Get header
  console.log(output.headers)
  
  // Done
  return response;
}
POST Request with application/x-www-form-urlencoded body
async function onResponse(context, url, request, response) {  
  // Define form Body and Header
  // Make sure "Content-Type" is "application/x-www-form-urlencoded"
  var param = {
    body: {
      "key1": "value1",
      "key2": "value2"
    },
    headers: {
      "Content-Type": "application/x-www-form-urlencoded"
    }
  }
​
  // POST request with await
  var output = await $http.post("https://httpbin.org/post", param);
  
  // Get Status Code
  console.log(output.statusCode);
  
  // Get body
  console.log(output.body)
  
  // Get header
  console.log(output.headers)
  
  // Done
  return response;
}
PUT / PATCH / DELETE Request
async function onRequest(context, url, request) {  
​
  var param = {
    body: {
      "user": {
        "name": "Proxyman"
      }
    },
    headers: {
      "Content-Type": "application/json"
  }
​
​
  var output = await $http.post("https://httpbin.org/post", param);
  var output = await $http.put("https://httpbin.org/put", param);
  var output = await $http.delete("https://httpbin.org/delete", param);
  
  // Done
  return request;
}
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On this page
1. What's it?
2. Common on Request and Response
3. Addons
4. Regex
5. Import / Export Files