关闭离线模式下的Browsersync和http-proxy-middleware

是否Browsersync与http-proxy-middleware工作脱机，如果我代理到本地主机服务器?

我有一个部署在localhost:3000的angular应用程序，它向部署在localhost:8080的api服务器发出请求。对api-server的http请求由Browsersync http-proxy-middleware代理。如果我有互联网连接，一切都可以正常工作，但是，如果我脱机，我在gulp控制台得到以下错误:

[HPM] Proxy error: ENOENT localhost:8080/data/pet

在浏览器控制台上:

Failed to load resource: the server responded with a status of `500 (Internal Server Error)`

我知道错误不在服务器上，因为我仍然可以用浏览器访问localhost:8080/data/pet。

由于api-server是本地部署的，所以我需要一个internet连接来代理http请求似乎很奇怪。

angular应用及其所有配置都是用generator-gulp-angular

'use strict';
var path = require('path');
var gulp = require('gulp');
var conf = require('./conf');
var browserSync = require('browser-sync');
var browserSyncSpa = require('browser-sync-spa');
var util = require('util');
var proxyMiddleware = require('http-proxy-middleware');
function browserSyncInit(baseDir, browser) {
  browser = browser === undefined ? 'default' : browser;
  var routes = null;
  if (baseDir === conf.paths.src || (util.isArray(baseDir) && baseDir.indexOf(conf.paths.src) !== -1)) {
    routes = {
      '/bower_components': 'bower_components'
    };
  }
  var server = {
    baseDir: baseDir,
    routes: routes
  };

  server.middleware = proxyMiddleware('/data',
    {
      target: 'http://localhost:8080'
    });
  browserSync.instance = browserSync.init({
    startPath: '/',
    server: server,
    browser: browser,
    online: false
  });
}
browserSync.use(browserSyncSpa({
  selector: '[ng-app]'// Only needed for angular apps
}));
gulp.task('serve', ['watch'], function () {
  browserSyncInit([path.join(conf.paths.tmp, '/serve'), conf.paths.src]);
});
gulp.task('serve:dist', ['build'], function () {
  browserSyncInit(conf.paths.dist);
});
gulp.task('serve:e2e', ['inject'], function () {
  browserSyncInit([conf.paths.tmp + '/serve', conf.paths.src], []);
});
gulp.task('serve:e2e-dist', ['build'], function () {
  browserSyncInit(conf.paths.dist, []);
});

{
  "name": "petStore",
  "version": "0.0.0",
  "dependencies": {},
  "scripts": {
    "test": "gulp test"
  },
  "devDependencies": {
    "gulp": "~3.9.0",
    "gulp-autoprefixer": "~2.3.1",
    "gulp-angular-templatecache": "~1.6.0",
    "del": "~1.2.0",
    "lodash": "~3.9.3",
    "gulp-csso": "~1.0.0",
    "gulp-filter": "~2.0.2",
    "gulp-flatten": "~0.0.4",
    "gulp-jshint": "~1.11.0",
    "gulp-load-plugins": "~0.10.0",
    "gulp-size": "~1.2.1",
    "gulp-uglify": "~1.2.0",
    "gulp-useref": "~1.2.0",
    "gulp-util": "~3.0.5",
    "gulp-ng-annotate": "~1.0.0",
    "gulp-replace": "~0.5.3",
    "gulp-rename": "~1.2.2",
    "gulp-rev": "~5.0.0",
    "gulp-rev-replace": "~0.4.2",
    "gulp-minify-html": "~1.0.3",
    "gulp-inject": "~1.3.1",
    "gulp-protractor": "~1.0.0",
    "gulp-sourcemaps": "~1.5.2",
    "gulp-less": "~3.0.3",
    "gulp-angular-filesort": "~1.1.1",
    "main-bower-files": "~2.8.0",
    "merge-stream": "~0.1.7",
    "jshint-stylish": "~2.0.0",
    "wiredep": "~2.2.2",
    "karma": "~0.12.36",
    "karma-jasmine": "~0.3.5",
    "karma-phantomjs-launcher": "~0.2.0",
    "karma-angular-filesort": "~0.1.0",
    "karma-ng-html2js-preprocessor": "~0.1.2",
    "concat-stream": "~1.5.0",
    "require-dir": "~0.3.0",
    "browser-sync": "~2.7.12",
    "browser-sync-spa": "~1.0.2",
    "http-proxy-middleware": "~0.2.0",
    "chalk": "~1.0.0",
    "uglify-save-license": "~0.4.1",
    "wrench": "~1.5.8"
  },
  "engines": {
    "node": ">=0.10.0"
  }
}

这是http调用:

  $http.get("/data/pet").then(function (result) {
        vm.petName = result.data.name;
      });

和bower.json

{
  "name": "petStore",
  "version": "0.0.0",
  "dependencies": {
    "angular-resource": "~1.4.0",
    "angular-ui-router": "~0.2.15",
    "bootstrap": "~3.3.4",
    "angular-bootstrap": "~0.13.0",
    "malarkey": "yuanqing/malarkey#~1.3.0",
    "toastr": "~2.1.1",
    "moment": "~2.10.3",
    "animate.css": "~3.3.0",
    "angular": "~1.4.0"
  },
  "devDependencies": {
    "angular-mocks": "~1.4.0"
  },
  "resolutions": {
    "angular": "~1.4.0"
  }
}