Merge pull request #68 from Shudrum/passthrough

Passthrough

package.json

@@ -1,7 +1,7 @@
 {
   "name": "nodegate",
   "description": "API gateway made simple, fast and easy to configure.",
-  "version": "1.4.0",
+  "version": "1.5.0",
   "author": "Julien Martin <martin.julien82@gmail.com>",
   "license": "MIT",
   "scripts": {

services/nodegate.js

@@ -8,6 +8,7 @@
 const bodyParser = require('body-parser');
 const cors = require('cors');
 const express = require('express');
+const request = require('request');
 const { execute } = require('../entities/route');
 const { getConfiguration } = require('../services/configuration');
 
@@ -44,12 +45,21 @@ const nodegate = () => {
     expressApp.handle(req, res, next);
   };
 
-  // TODO: app.passthrough = (route) => {};
-
   app.beforeEach = (workers) => {
     toArray(workers).forEach((worker) => beforeEach.push(worker));
   };
 
+  app.passthrough = (routes) => {
+    toArray(routes).forEach((route) => {
+      expressApp[route.method.toLowerCase()](route.path, (req, res) => {
+        request[route.method.toLowerCase()](route.target, {
+          ...(req.headers && { headers: req.headers }),
+          ...(req.body && { form: req.body }),
+        }).pipe(res);
+      });
+    });
+  };
+
   app.route = (routes) => {
     toArray(routes).forEach((route) => {
       expressApp[route.method.toLowerCase()](

test/services/nodegate.test.js

@@ -1,3 +1,4 @@
+const nock = require('nock');
 const request = require('supertest');
 const WorkflowError = require('../../entities/WorkflowError');
 const nodegate = require('../../services/nodegate');
@@ -83,6 +84,61 @@ describe('services/nodegate', () => {
         });
     });
   });
+  describe('#passthrough', () => {
+    it('should call the target URL with the right verb', async () => {
+      nock('http://service.com').get('/').reply(200);
+      const gate = nodegate();
+      gate.passthrough({
+        method: 'get',
+        path: '/service',
+        target: 'http://service.com',
+      });
+      await request(gate).get('/service').expect(200);
+    });
+    it('should call the target URL with the headers', async () => {
+      nock('http://service.com', {
+        reqheaders: {
+          authorization: 'shu:drum',
+        },
+      }).get('/').reply(200);
+      const gate = nodegate();
+      gate.passthrough({
+        method: 'get',
+        path: '/service',
+        target: 'http://service.com',
+      });
+      await request(gate)
+        .get('/service')
+        .set('authorization', 'shu:drum')
+        .expect(200);
+    });
+    it('should call the target URL with the body', async () => {
+      nock('http://service.com').get('/', { username: 'shudrum' }).reply(200);
+      const gate = nodegate();
+      gate.passthrough({
+        method: 'get',
+        path: '/service',
+        target: 'http://service.com',
+      });
+      await request(gate)
+        .get('/service')
+        .send({ username: 'shudrum' })
+        .expect(200);
+    });
+    it('should return the raw body', async () => {
+      nock('http://service.com').get('/').reply(200, 'Multiline\nContent');
+      const gate = nodegate();
+      gate.passthrough({
+        method: 'get',
+        path: '/service',
+        target: 'http://service.com',
+      });
+      const { text } = await request(gate)
+        .get('/service')
+        .expect(200);
+      expect(text).toEqual('Multiline\nContent');
+    });
+  });
   describe('HTTP status codes', () => {
     it('should respond a 500 error in case of error', async () => {
       const gate = nodegate();