Add proxy option to jwksClient

README.md

@@ -21,7 +21,8 @@ const client = jwksClient({
   strictSsl: true, // Default value
   jwksUri: 'https://sandrino.auth0.com/.well-known/jwks.json',
   requestHeaders: {}, // Optional
-  requestAgentOptions: {} // Optional
+  requestAgentOptions: {}, // Optional
+  proxy: '[protocol]://[username]:[pass]@[address]:[port]', // Optional
 });
 
 const kid = 'RkI5MjI5OUY5ODc1N0Q4QzM0OUYzNkVGMTJDOUEzQkFCOTU3NjE2Rg';

index.d.ts

@@ -22,6 +22,7 @@ declare namespace JwksRsa {
     cacheMaxEntries?: number;
     cacheMaxAge?: number;
     jwksRequestsPerMinute?: number;
+    proxy?: string;
     strictSsl?: boolean;
     requestHeaders?: Headers;
   }

src/JwksClient.js

@@ -40,7 +40,8 @@ export class JwksClient {
       uri: this.options.jwksUri,
       strictSSL: this.options.strictSsl,
       headers: this.options.requestHeaders,
-      agentOptions: this.options.requestAgentOptions
+      agentOptions: this.options.requestAgentOptions,
+      proxy: this.options.proxy,
     }, (err, res) => {
       if (err || res.statusCode < 200 || res.statusCode >= 300) {
         this.logger('Failure:', res && res.body || err);

tests/jwksClient.tests.js

@@ -6,6 +6,7 @@ import { JwksClient } from "../src/JwksClient";
 
 describe("JwksClient", () => {
   const jwksHost = "http://my-authz-server";
+  const proxy = "my-proxy-server:2815";
 
   beforeEach(() => {
     nock.cleanAll();
@@ -182,8 +183,28 @@ describe("JwksClient", () => {
         done();
       });
     });
-  });
 
+    it("should use a proxy if specified", done => {
+      const expectedError = { message: 'expectedError' };
+      nock(`http://${proxy}`)
+        .get(() => true)
+        .replyWithError(expectedError);
+
+      const client = new JwksClient({
+        jwksUri: `${jwksHost}/.well-known/jwks.json`,
+        requestHeaders: {
+          "User-Agent": "My-bot"
+        },
+        proxy: `http://username:password@${proxy}`,
+      });
+
+      client.getKeys((err) => {
+        expect(err).to.equal(expectedError);
+        done();
+      });
+    });
+  });
+
   describe("#getSigningKeys", () => {
     it("should handle errors", done => {
       nock(jwksHost)