feature: Add proxy configuration to the client

README.md

@@ -70,6 +70,29 @@ Primary accounts can make API calls on behalf of their subaccounts. [API documen
   // then, if you need to reset it back to the primary account:
   mg.resetSubaccount();
 ```
+
+### Proxy configuration
+By leveraging client configuration options, users can effortlessly establish proxy connections that align with their network requirements.
+Ex:
+```js
+  import * as FormData from 'form-data';
+  import Mailgun from 'mailgun.js';
+  const mailgun = new Mailgun(FormData);
+
+  const mg = mailgun.client({
+    username: 'api',
+    key: process.env.MAILGUN_API_KEY || 'key-yourkeyhere',
+    proxy: {
+      protocol: 'https' // 'http' ,
+      host: '127.0.0.1', // use your proxy host here
+      port: 9000, // use your proxy port here
+      auth: { // may be omitted if proxy doesn't require authentication
+        username: 'user_name', // provide username
+        password: 'user_password' // provide password
+      }
+    },
+  });
+```
 ### Types imports
 Starting from version **9.0.0.** Types can be includes as named import:
 ```TS

dist/Classes/common/Request.d.ts

@@ -8,6 +8,7 @@ declare class Request {
     private headers;
     private formDataBuilder;
     private maxBodyLength;
+    private proxy;
     constructor(options: RequestOptions, formData: InputFormData);
     request(method: string, url: string, onCallOptions?: Record<string, unknown | Record<string, unknown>>): Promise<APIResponse>;
     private getResponseBody;

dist/Types/MailgunClient/MailgunClientOptions.d.ts

@@ -1,7 +1,9 @@
+import { AxiosProxyConfig } from 'axios';
 export type MailgunClientOptions = {
     username: string;
     key: string;
     url?: string;
     public_key?: string;
     timeout?: number;
+    proxy?: AxiosProxyConfig;
 };

lib/Classes/common/Request.ts

@@ -1,7 +1,11 @@
 import * as base64 from 'base-64';
 import urljoin from 'url-join';
 import axios, {
-  AxiosError, AxiosResponse, AxiosHeaders, RawAxiosRequestHeaders
+  AxiosError,
+  AxiosResponse,
+  AxiosHeaders,
+  RawAxiosRequestHeaders,
+  AxiosProxyConfig,
 } from 'axios';
 import * as NodeFormData from 'form-data';
 import APIError from './Error';
@@ -25,6 +29,7 @@ class Request {
   private headers: AxiosHeaders;
   private formDataBuilder: FormDataBuilder;
   private maxBodyLength: number;
+  private proxy: AxiosProxyConfig | undefined;
 
   constructor(options: RequestOptions, formData: InputFormData) {
     this.username = options.username;
@@ -34,6 +39,7 @@ class Request {
     this.headers = this.makeHeadersFromObject(options.headers);
     this.formDataBuilder = new FormDataBuilder(formData);
     this.maxBodyLength = 52428800; // 50 MB
+    this.proxy = options?.proxy;
   }
 
   async request(
@@ -66,7 +72,8 @@ class Request {
         url: urlValue,
         headers: requestHeaders,
         ...params,
-        maxBodyLength: this.maxBodyLength
+        maxBodyLength: this.maxBodyLength,
+        proxy: this.proxy,
       });
     } catch (err: unknown) {
       const errorResponse = err as AxiosError;

lib/Types/MailgunClient/MailgunClientOptions.ts

@@ -1,8 +1,10 @@
+import { AxiosProxyConfig } from 'axios';
 /* eslint-disable camelcase */
 export type MailgunClientOptions = {
   username: string;
   key: string;
   url?: string;
   public_key?: string;
   timeout?: number;
+  proxy?: AxiosProxyConfig;
 }

test/client.test.ts

@@ -25,10 +25,10 @@ import DomainTemplatesClient from '../lib/Classes/Domains/domainsTemplates';
 import MultipleValidationClient from '../lib/Classes/Validations/multipleValidation';
 import MailListsMembers from '../lib/Classes/MailingLists/mailListMembers';
 
-describe('Client', function () {
+describe('Client', () => {
   let client: IMailgunClient;
 
-  beforeEach(function () {
+  beforeEach(() => {
     client = new Client({
       username: 'username',
       key: 'key',
@@ -37,27 +37,11 @@ describe('Client', function () {
     }, formData as InputFormData);
   });
 
-  it('raises error when username is not provided', function () {
-    expect(
-      function () {
-        return new Client({ key: 'key' } as MailgunClientOptions, formData as InputFormData);
-      }
-    ).to.throw('Parameter "username" is required');
-  });
-
-  it('raises error when key is not provided', function () {
-    expect(
-      function () {
-        return new Client({ username: 'username' } as MailgunClientOptions, formData as InputFormData);
-      }
-    ).to.throw('Parameter "key" is required');
-  });
-
-  it('exposes raw request client', function () {
+  it('exposes raw request client', () => {
     client.should.have.property('request').to.be.instanceOf(Request);
   });
 
-  it('sets and resets subaccount header for requests', function () {
+  it('sets and resets subaccount header for requests', () => {
     client.setSubaccount('XYZ');
     client.should.have.property('request').to.be.instanceOf(Request);
     client.should.have.property('request').to.haveOwnProperty('headers')
@@ -67,7 +51,7 @@ describe('Client', function () {
       .to.not.haveOwnProperty(SubaccountsClient.SUBACCOUNT_HEADER);
   });
 
-  it('creates domain client', function () {
+  it('creates domain client', () => {
     client.domains.should.be.instanceOf(DomainsClient);
   });
 
@@ -83,55 +67,115 @@ describe('Client', function () {
     client.domains.domainTemplates.should.be.instanceOf(DomainTemplatesClient);
   });
 
-  it('creates event client', function () {
+  it('creates event client', () => {
     client.events.should.be.instanceOf(EventsClient);
   });
 
-  it('creates webhook client', function () {
+  it('creates webhook client', () => {
     client.webhooks.should.be.instanceOf(WebhooksClient);
   });
 
-  it('creates suppressions client', function () {
+  it('creates suppressions client', () => {
     client.suppressions.should.be.instanceOf(SuppressionsClient);
   });
 
-  it('creates stats client', function () {
+  it('creates stats client', () => {
     client.stats.should.be.instanceOf(StatsClient);
   });
 
-  it('creates messages client', function () {
+  it('creates messages client', () => {
     client.messages.should.be.instanceOf(MessagesClient);
   });
 
-  it('creates routes client', function () {
+  it('creates routes client', () => {
     client.routes.should.be.instanceOf(RoutesClient);
   });
 
-  it('creates ips client', function () {
+  it('creates ips client', () => {
     client.ips.should.be.instanceOf(IpsClient);
   });
 
-  it('creates ip_pools client', function () {
+  it('creates ip_pools client', () => {
     client.ip_pools.should.be.instanceOf(IpPoolsClient);
   });
 
-  it('creates lists client', function () {
+  it('creates lists client', () => {
     client.lists.should.be.instanceOf(ListsClient);
   });
 
-  it('creates mail lists members client', function () {
+  it('creates mail lists members client', () => {
     client.lists.members.should.be.instanceOf(MailListsMembers);
   });
 
-  it('creates address validate client', function () {
+  it('creates address validate client', () => {
     client.validate.should.be.instanceOf(ValidateClient);
   });
 
-  it('creates multiple validation client', function () {
+  it('creates multiple validation client', () => {
     client.validate.multipleValidation.should.be.instanceOf(MultipleValidationClient);
   });
 
-  it('creates subaccounts client', function () {
+  it('creates subaccounts client', () => {
     client.subaccounts.should.be.instanceOf(SubaccountsClient);
   });
+
+  describe('User configuration', () => {
+    it('respects proxy settings', () => {
+      const mgClient = new Client({
+        username: 'username',
+        key: 'key',
+        public_key: 'key',
+        proxy: {
+          protocol: 'https',
+          host: '127.0.0.1',
+          port: 9000,
+          auth: {
+            username: 'test',
+            password: 'test-pass'
+          }
+        }
+      } as MailgunClientOptions, formData as InputFormData);
+      mgClient.should.have.property('request');
+      mgClient.should.have.property('request').to.have.property('proxy').to.eql({
+        protocol: 'https',
+        host: '127.0.0.1',
+        port: 9000,
+        auth: {
+          username: 'test',
+          password: 'test-pass'
+        }
+      });
+    });
+
+    it('respects timeout and url settings', () => {
+      const mgClient = new Client({
+        username: 'username',
+        key: 'key',
+        public_key: 'public_key',
+        timeout: 1000,
+        url: 'test_url'
+      } as MailgunClientOptions, formData as InputFormData);
+      mgClient.should.have.property('request');
+      mgClient.should.have.property('request').to.have.property('timeout').to.equal(1000);
+      mgClient.should.have.property('request').to.have.property('url').to.eql('test_url');
+    });
+
+    it('raises error when username is not provided', () => {
+      expect(
+        () => new Client(
+          { key: 'key' } as MailgunClientOptions,
+          formData as InputFormData
+        )
+      ).to.throw('Parameter "username" is required');
+    });
+
+    it('raises error when key is not provided', () => {
+      expect(
+        () => new Client(
+          { username: 'username' } as MailgunClientOptions,
+          formData as InputFormData
+        )
+      ).to.throw('Parameter "key" is required');
+    });
+  });
 });