✨ Request util to wrap got library

no issue

This PR includes a new util which wraps the `got` library. It is not used in the codebase yet, but tested with `image-size` util:
- wraps `got` request library in its own `request.js` util that returns bluebird promises and validates URL before starting a request
- adds tests

core/server/utils/request.js

@@ -0,0 +1,24 @@
+var got = require('got'),
+    Promise = require('bluebird'),
+    validator = require('../data/validation').validator,
+    errors = require('../errors'),
+    _  = require('lodash');
+
+module.exports = function request(url, options) {
+    if (_.isEmpty(url) || !validator.isURL(url)) {
+        return Promise.reject(new errors.InternalServerError({
+            message: 'URL empty or invalid.',
+            code: 'URL_MISSING_INVALID',
+            context: url
+        }));
+    }
+
+    return got(
+        url,
+        options
+    ).then(function (response) {
+        return Promise.resolve(response);
+    }).catch(function (err) {
+        return Promise.reject(err);
+    });
+};

core/test/unit/utils/request_spec.js

@@ -0,0 +1,186 @@
+var should = require('should'),
+    sinon = require('sinon'),
+    rewire = require('rewire'),
+    nock = require('nock'),
+
+    // Stuff we are testing
+    request = rewire('../../../server/utils/request'),
+
+    sandbox = sinon.sandbox.create();
+
+describe('Request', function () {
+    var result,
+        requestMock,
+        secondRequestMock;
+
+    afterEach(function () {
+        sandbox.restore();
+    });
+
+    it('[success] should return response for http request', function (done) {
+        var url = 'http://some-website.com/endpoint/',
+            expectedResponse =
+            {
+                body: 'Response body',
+                url: 'http://some-website.com/endpoint/',
+                statusCode: 200
+            },
+            options = {
+                headers: {
+                    'User-Agent': 'Mozilla/5.0'
+                }
+            };
+
+        requestMock = nock('http://some-website.com')
+            .get('/endpoint/')
+            .reply(200, 'Response body');
+
+        result = request(url, options).then(function (res) {
+            requestMock.isDone().should.be.true();
+            should.exist(res);
+            should.exist(res.body);
+            res.body.should.be.equal(expectedResponse.body);
+            should.exist(res.url);
+            res.statusCode.should.be.equal(expectedResponse.statusCode);
+            should.exist(res.statusCode);
+            res.url.should.be.equal(expectedResponse.url);
+            done();
+        }).catch(done);
+    });
+
+    it('[success] can handle redirect', function (done) {
+        var url = 'http://some-website.com/endpoint/',
+            expectedResponse =
+            {
+                body: 'Redirected response',
+                url: 'http://someredirectedurl.com/files/',
+                statusCode: 200
+            },
+            options = {
+                headers: {
+                    'User-Agent': 'Mozilla/5.0'
+                }
+            };
+
+        requestMock = nock('http://some-website.com')
+            .get('/endpoint/')
+            .reply(301, 'Oops, got redirected',
+            {
+                location: 'http://someredirectedurl.com/files/'
+            });
+
+        secondRequestMock = nock('http://someredirectedurl.com')
+            .get('/files/')
+            .reply(200, 'Redirected response');
+
+        result = request(url, options).then(function (res) {
+            requestMock.isDone().should.be.true();
+            secondRequestMock.isDone().should.be.true();
+            should.exist(res);
+            should.exist(res.body);
+            res.body.should.be.equal(expectedResponse.body);
+            should.exist(res.url);
+            res.statusCode.should.be.equal(expectedResponse.statusCode);
+            should.exist(res.statusCode);
+            res.url.should.be.equal(expectedResponse.url);
+            done();
+        }).catch(done);
+    });
+
+    it('[failure] can handle invalid url', function (done) {
+        var url = 'test',
+            options = {
+                headers: {
+                    'User-Agent': 'Mozilla/5.0'
+                }
+            };
+
+        result = request(url, options)
+            .catch(function (err) {
+                should.exist(err);
+                err.message.should.be.equal('URL empty or invalid.');
+                done();
+            });
+    });
+
+    it('[failure] can handle empty url', function (done) {
+        var url = '',
+            options = {
+                headers: {
+                    'User-Agent': 'Mozilla/5.0'
+                }
+            };
+
+        result = request(url, options)
+            .catch(function (err) {
+                should.exist(err);
+                err.message.should.be.equal('URL empty or invalid.');
+                done();
+            });
+    });
+
+    it('[failure] can handle an error with statuscode not 200', function (done) {
+        var url = 'http://nofilehere.com/files/test.txt',
+            options = {
+                headers: {
+                    'User-Agent': 'Mozilla/5.0'
+                }
+            };
+
+        requestMock = nock('http://nofilehere.com')
+            .get('/files/test.txt')
+            .reply(404);
+
+        result = request(url, options)
+            .catch(function (err) {
+                requestMock.isDone().should.be.true();
+                should.exist(err);
+                err.statusMessage.should.be.equal('Not Found');
+                done();
+            });
+    });
+
+    it('[failure] will timeout', function (done) {
+        var url = 'http://nofilehere.com/files/test.txt',
+            options = {
+                headers: {
+                    'User-Agent': 'Mozilla/5.0'
+                },
+                timeout: 10
+            };
+
+        requestMock = nock('http://nofilehere.com')
+            .get('/files/test.txt')
+            .socketDelay(11)
+            .reply(408);
+
+        result = request(url, options)
+            .catch(function (err) {
+                requestMock.isDone().should.be.true();
+                should.exist(err);
+                err.statusMessage.should.be.equal('Request Timeout');
+                done();
+            });
+    });
+
+    it('[failure] returns error if request errors', function (done) {
+        var url = 'http://nofilehere.com/files/test.txt',
+            options = {
+                headers: {
+                    'User-Agent': 'Mozilla/5.0'
+                }
+            };
+
+        requestMock = nock('http://nofilehere.com')
+            .get('/files/test.txt')
+            .reply(500, {message: 'something aweful happend', code: 'AWFUL_ERROR'});
+
+        result = request(url, options)
+            .catch(function (err) {
+                requestMock.isDone().should.be.true();
+                should.exist(err);
+                err.statusMessage.should.be.equal('Internal Server Error');
+                done();
+            });
+    });
+});