Snippet Code

1. What's it?
A collection of snippet Javascript code for the Scripting Tool.
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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​
​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​
HTTP Header
Add/Update: Request or Response Header
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function onRequest(context, url, request) {
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    // Add or update Request Header
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    request.headers["X-Proxyman-Key"] = "My-Value";
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    request.headers.name = "Proxyman";
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    return request;
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}
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​
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function onResponse(context, url, request, response) {
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    // Add or update Response Header
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    response.headers["X-Proxyman-Key"] = "My-Value";
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    response.headers.id = 100;
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    return response;
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}
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Delete: Request or Response Header
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function onRequest(context, url, request) {
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    delete request.headers["X-Proxyman-Key"];
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    return request;
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}
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​
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function onResponse(context, url, request, response) {
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    delete response.headers["X-Proxyman-Key"];
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    return response;
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}
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​
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Request Query
Add/Update
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function onRequest(context, url, request) {
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    request.queries["name"] = "Proxyman";
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    request.queries["platform"] = "macOS";
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    // => http://proxyman.io?name=Proxyman&platform=macOS
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    return request;
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}
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Delete
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function onRequest(context, url, request) {
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    delete request.queries["name"];
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    delete request.queries["platform"];
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    return request;
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}
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​
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URLEncoded Form Body
Add/Update
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function onRequest(context, url, request) {
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    // Make sure the Response Header is application/x-www-form-urlencoded
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    // Content-Type: application/x-www-form-urlencoded   
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    var formBody = request.body;
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​
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    formBody["name"] = "Proxyman";
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    formBody["flatform"] = "macOS";
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​
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    request.body = formBody; // => name=Proxyman&platform=macOS
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    return request;
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}
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​
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Delete 
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function onRequest(context, url, request) {
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    // Content-Type: application/x-www-form-urlencoded
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    var formBody = request.body;
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​
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    delete formBody["name"];
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    delete formBody["flatform"];
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​
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    request.body = formBody;
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    return request;
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}
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​
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Change Request Destination (scheme, host, port, path)
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function onRequest(context, url, request) {
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    request.scheme = "http";
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    request.host = "proxyman.dev";
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    request.port = 9090;
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    request.path = "v1/data/user";
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    return request;
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}
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Change HTTP Request Method
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function onRequest(context, url, request) {
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    request.method = "POST";
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    return request;
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}
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Change Response HTTP Status Code
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function onResponse(context, url, request, response) {
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    response.statusCode = 404;
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    return response;
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}
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JSON Body
On Request
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function onRequest(context, url, request) {
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    // Set JSON content
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    request.headers["Content-Type"] = "application/json";
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    // Get Request body
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    var jsonBody = request.body;
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    // Modify data
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    jsonBody["name"] = "Proxyman";
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    jsonBody["flatform"] = "macOS";
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    jsonBody["info"] = { 
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                        "website": "proxyman.io",
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                        "region": "Earth"
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                       };
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    // Set it again        
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    request.body = jsonBody;
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    return request;
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}
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On Response
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function onResponse(context, url, request, response)  {
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    // Set JSON content
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    response.headers["Content-Type"] = "application/json";
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    // Get Request body
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    var jsonBody = response.body;
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    // Modify data
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    jsonBody["name"] = "Proxyman";
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    jsonBody["flatform"] = "macOS";
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    jsonBody["info"] = { 
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                        "website": "proxyman.io",
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                        "region": "Earth"
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                       };
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    // Set it again        
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    response.body = jsonBody;
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    return response;
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}
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​
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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
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// For request
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request.bodyFilePath = "~/Desktop/image.png";
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​
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// For response
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response.bodyFilePath = "~/Desktop/image.png";
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function onResponse(context, url, request, response) {
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  response.headers["Content-Type"] = "image/png";
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  response.bodyFilePath = "~/Desktop/image.png";
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  // Done
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  return response;
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}
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function onResponse(context, url, request, response) {
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  response.headers["Content-Type"] = "application/json";
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  response.bodyFilePath = "~/Desktop/my_response.json";
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  // Done
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  return response;
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}
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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.
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Follow this tutorial to understand how to import a JSON file to the script
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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
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const file_1 = require("@users/myfile_1.json");
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const file_2 = require("@users/myfile_2.json");
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const file_3 = require("@users/myfile_3.json");
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​
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function onResponse(context, url, request, response) {
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  // Set JSON content
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  response.headers["Content-Type"] = "application/json";
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  // Check
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  if (url.includes("v1/data")) {
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    response.body = file_1
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  } else if (url.includes("v2/login")) {
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      response.body = file_2
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  } else if (url.includes("v3/user")) {
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      response.body = file_3
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  }
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​
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  // Done
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  return response;
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}
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Map Local with GraphQL
Read more at https://github.com/ProxymanApp/Proxyman/issues/412#issuecomment-697101594​
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// Import your JSON file here 
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const file = require("@users/B02D96D5.default_message_32E64A5B.json");
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​
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function onRequest(context, url, request) {
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​
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  // 1. Extract the queryName from the request
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  var queryName = request.body.query.match(/\S+/gi)[1].split('(').shift();
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​
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  // 2. Save to sharedState
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  sharedState.queryName = queryName
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​
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  // Done
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  return request;
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}
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​
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function onResponse(context, url, request, response) {
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​
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  // 3. Check if it's the request we need to map
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  if (sharedState.queryName == "user") {
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    // 4. Import the local file by Action Button -> Import
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    // Get the local JSON file and set it as a body (like Map Local)
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    response.headers["Content-Type"] = "application/json";
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    response.body = file;
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  }
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​
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  // Done
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  return response;
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}
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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. 
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// Import
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const { btoa } = require('@addons/Base64.js');
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​
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function onResponse(context, url, request, response) {
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  // Construct the ArrayBuffer
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  const buffer = new ArrayBuffer(256)
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  const view = new Uint8Array(buffer)
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  for (let i = 0; i < view.length; i++) {
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    view[i] = i
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  }
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  // Convert ArrayBuffer to Base64String
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  var newBody = btoa(String.fromCharCode.apply(null, new Uint8Array(buffer)));
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  // Set new body
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  response.body = newBody;
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  response.statusCode = 200
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  response.headers['Content-Type'] = 'application/octet-stream'
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​
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  // Done
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  return response;
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}
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Preserve the Host
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function onRequest(context, url, request) {
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    request.preserveHostHeader = true
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    return request
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}
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Comment & Highlight with color
Use comment or color to highlight on the main table view.
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function onRequest(context, url, request) {
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    request.comment = "It's a Request"
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    request.color = "red" // red, blue, yellow, purple, gray, green
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    return request
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}
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​
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function onResponse(context, url, request, response) {
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    response.comment = "It's a Response"
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    response.color = "yellow" // red, blue, yellow, purple, gray, green
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    return response
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}
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Use Scripting for Color and Comment
Import Files with require()
JSON
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Prepare a JSON file and save it to your Desktop
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// myfile.json
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{
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  "name": "Proxyman",
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  "platform": "macOS",
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  "info": {
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    "website": "proxyman.io",
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    "region": "Earth"
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  }
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}
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2. More -> Import JSON or Other Files. Then selecting your file 
3. Proxyman will add the import code to the top of the script
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// ~/Library/Application Support/com.proxyman.NSProxy/users/myfile.json
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const file = require("@users/myfile.json");
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​
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function onResponse(context, url, request, response) {
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  // 1. Set header to JSON if need
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  response.headers["Content-Type"] = "application/json";
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​
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  // 2. Set Body as a imported file
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  response.body = file;
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  return response;
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}
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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
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Follow the same above instruction (Select your Binary File)
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Set it as a body
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// ~/Library/Application Support/com.proxyman.NSProxy/users/myscreenshot.png
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const file = require("@users/myscreenshot.png");
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​
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function onResponse(context, url, request, response) {
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  // Set header
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  response.headers["Content-Type"] = "image/png";
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​
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  // Set Body
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  response.body = file;
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  return response;
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}
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Text-Based File
1.
Follow the same above instruction (Select your Binary File)
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Set it as a body
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// ~/Library/Application Support/com.proxyman.NSProxy/users/main.css
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const file = require("@users/main.css");
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​
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function onResponse(context, url, request, response) {
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  // Set header
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  response.headers["Content-Type"] = "text/css";
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​
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  // Set Body
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  response.body = file;
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  return response;
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}
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Import File without using the "Import Tool"
From Proxyman 2.24.0+, you can import any files without using the "Import File".
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// Import your file from your Desktop folder
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const file = require("~/Desktop/myfile.json");
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​
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function onResponse(context, url, request, response) {
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​
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  // 1. Set header to JSON if need
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  response.headers["Content-Type"] = "application/json";
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​
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  // 2. Set Body as a imported file
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  response.body = file;
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  return response;
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}
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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
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// Encode Base64
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const { btoa } = require("@addons/Base64.js")
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​
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// Usage:
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var text = "HelloWorld";
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var encodedText = btoa(text);
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// Decode Base64
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const { atob } = require("@addons/Base64.js")
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​
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// Usage:
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var text = atob("aGVsbG8=");
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Use Hashing Addon (MD5, SHA1, SHA256, SHA512)
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// Hash MD5
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const { md5 } = require("@addons/MD5.js")
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​
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// Usage:
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var hashedText = md5("Hello World");
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// Hash SHA1
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const { sha1 } = require("@addons/SHA1.js")
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​
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// Usage:
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var hashedText = sha1("Hello World");
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Use UUID-v4 Addon
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// Hash MD5
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const { uuidv4 } = require("@addons/UUID.js")
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​
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// Usage:
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var uuid = uuidv4();
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Deflate/Inflate and GZip/UnGZip
Deflate/inflate
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const { inflate, deflate } = require("@addons/Pako.js")
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​
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// Compress
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var input = "Hello World from Pako!!!"
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var result = deflate(input);
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console.log(result); // eJzzSM3JyVcIzy/KSVFIK8rPVQhIzM5XVFQEAGsMB/8=
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​
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// Decompress
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var text = 'eJzzSM3JyVcIzy/KSVFIK8rPVQhIzM5XVFQEAGsMB/8=';
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var rawText = inflate(text);
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console.log(rawText); // Hello World from Pako!!!
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GZip/UnGZip
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const { ungzip, gzip } = require("@addons/Pako.js")
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​
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// Compress
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var text =  'HelloWorld';
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var result = gzip(text);
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console.log(result); // H4sIAAAAAAAAA/NIzcnJD88vykkBAHkMd3cKAAAA
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​
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// Decompress
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var text =  'H4sIAAAAAAAAA/NIzcnJD88vykkBAHkMd3cKAAAA';
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var rawText = ungzip(text);
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console.log(rawText); // HelloWorld
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JWT Decode
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const { jwtDecode } = require('@addons/JWTDecode.js');
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​
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var text = 'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiaWF0IjoxNTE2MjM5MDIyfQ.SflKxwRJSMeKKF2QT4fwpMeJf36POk6yJV_adQssw5c';
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var jSONObject = jwtDecode(text)
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Logging
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// Print the obj
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const myObj = {};
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console.log(myObj);
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​
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// Print type of the obj
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console.log(typeof(myObj));
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Regex
Only number
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//Init Regex
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var reg = /^-?\d*\.?\d*$/;
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​
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if (reg.test("123123123")) {
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    console.log("Matched");
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}
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Miscellaneous
By-pass CORS 
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function onResponse(context, url, request, response) {  
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​
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  // Allow all
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  response.headers["Access-Control-Allow-Origin"] = "*";
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​
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  // Done
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  return response;
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}
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Inject Header to Request / Response 
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function onRequest(context, url, request) {
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  // add header
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  request.headers["My-Injected-Header"] = "Proxyman";
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  return request
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}
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​
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function onResponse(context, url, request, response) {    
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  // add header
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  response.headers["My-Injected-Header"] = "Proxyman";
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  return response;
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}
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​
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Response delay with sleep() function
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function onResponse(context, url, request, response) {
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  console.log("Start sleep");
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  // Sleep 5 seconds
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  sleep(5000);
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  // Done
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  return response;
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}
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AES Encryption/Decryption
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const { encryptAES, decryptAES } = require("@addons/CryptoJS.js")
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​
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function onRequest(context, url, request) {
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  // Encrypt
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  var message = 'my message from Proxyman';
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  var password = 'secret key 123';
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  var ciphertext = encryptAES(message, password);
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  // Decrypt
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  var originalText = decryptAES(ciphertext, password);
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​
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  // Done
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  return request;
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}
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DES Encryption/Decryption
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const { encryptDES, decryptDES } = require("@addons/CryptoJS.js")
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​
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function onRequest(context, url, request) {
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  // Encrypt
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  var message = 'my message from Proxyman';
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  var password = 'secret key 123'