Angular2默認HTTP標頭與templateURL

Question

直升機，

當我在組件發送HTTP請求，我用

this.http.get(this.url) 
then(response => {console.log(response)}) 
.catch();` 

然後我可以使用DI，並通過我的自定義配置自定義頁眉REQUESTOPTION類

providers:[{provide:RequestOptions,useClass:MyHttpRequest}]

@Injectable() 
export class MyHttpRequest extends RequestOptions { 
constructor() { 
    super({ 
     method: RequestMethod.Get, 
     headers: new Headers({ 
      'Content-Type': 'application/json', 
      'X-Some-Header': 'some-content' 
     }) 
    }) 
    } 
} 

但是如何將標題添加到req uest通過templateUrl發送？

@Component({ 
    moduleId: module.id, 
    selector: 'app-contact', 
    templateUrl: '/site/contact' 
}) 
export class ContactComponent { 
} 

請求/ site/contact只有默認標頭。如何添加自定義標題？

Answer 1

在

node_modules \ @angular \平臺瀏覽器的動態\包\平臺瀏覽器的dynamic.umd.js

您可以閱讀ex.localstorage頭並將其添加到XHR，

var lang = JSON.parse(localStorage.getItem("Accept-Language")); 

xhr.setRequestHeader("Accept-Language", lang); 

那麼最終的文件：

(function(System, SystemJS) {/** 
* @license Angular v2.2.3 
* (c) 2010-2016 Google, Inc. https://angular.io/ 
* License: MIT 
*/ 
(function (global, factory) { 
    typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('@angular/compiler'), require('@angular/core'), require('@angular/platform-browser')) : 
    typeof define === 'function' && define.amd ? define(['exports', '@angular/compiler', '@angular/core', '@angular/platform-browser'], factory) : 
    (factory((global.ng = global.ng || {}, global.ng.platformBrowserDynamic = global.ng.platformBrowserDynamic || {}),global.ng.compiler,global.ng.core,global.ng.platformBrowser)); 
}(this, function (exports,_angular_compiler,_angular_core,_angular_platformBrowser) { 'use strict'; 

    var INTERNAL_BROWSER_PLATFORM_PROVIDERS = _angular_platformBrowser.__platform_browser_private__.INTERNAL_BROWSER_PLATFORM_PROVIDERS; 

    var __extends = (this && this.__extends) || function (d, b) { 
     for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; 
     function __() { this.constructor = d; } 
     d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __()); 
    }; 
    var ResourceLoaderImpl = (function (_super) { 
     __extends(ResourceLoaderImpl, _super); 
     function ResourceLoaderImpl() { 
      _super.apply(this, arguments); 
     } 
     ResourceLoaderImpl.prototype.get = function (url) { 
      var resolve; 
      var reject; 
      var promise = new Promise(function (res, rej) { 
       resolve = res; 
       reject = rej; 
      }); 

      var xhr = new XMLHttpRequest(); 
      xhr.open('GET', url, true); 
      xhr.responseType = 'text'; 
      var lang = JSON.parse(localStorage.getItem("Accept-Language")); 
      xhr.setRequestHeader("Accept-Language", lang); 

      xhr.onload = function() { 
       // responseText is the old-school way of retrieving response (supported by IE8 & 9) 
       // response/responseType properties were introduced in ResourceLoader Level2 spec (supported 
       // by IE10) 
       var response = xhr.response || xhr.responseText; 
       // normalize IE9 bug (http://bugs.jquery.com/ticket/1450) 
       var status = xhr.status === 1223 ? 204 : xhr.status; 
       // fix status code when it is 0 (0 status is undocumented). 
       // Occurs when accessing file resources or on Android 4.1 stock browser 
       // while retrieving files from application cache. 
       if (status === 0) { 
        status = response ? 200 : 0; 
       } 
       if (200 <= status && status <= 300) { 
        resolve(response); 
       } 
       else { 
        reject("Failed to load " + url); 
       } 
      }; 
      xhr.onerror = function() { reject("Failed to load " + url); }; 
      xhr.send(); 
      return promise; 
     }; 
     ResourceLoaderImpl.decorators = [ 
      { type: _angular_core.Injectable }, 
     ]; 
     /** @nocollapse */ 
     ResourceLoaderImpl.ctorParameters = []; 
     return ResourceLoaderImpl; 
    }(_angular_compiler.ResourceLoader)); 

    var INTERNAL_BROWSER_DYNAMIC_PLATFORM_PROVIDERS = [ 
     INTERNAL_BROWSER_PLATFORM_PROVIDERS, 
     { 
      provide: _angular_core.COMPILER_OPTIONS, 
      useValue: { providers: [{ provide: _angular_compiler.ResourceLoader, useClass: ResourceLoaderImpl }] }, 
      multi: true 
     }, 
    ]; 

    /** 
    * @license 
    * Copyright Google Inc. All Rights Reserved. 
    * 
    * Use of this source code is governed by an MIT-style license that can be 
    * found in the LICENSE file at https://angular.io/license 
    */ 
    var globalScope; 
    if (typeof window === 'undefined') { 
     if (typeof WorkerGlobalScope !== 'undefined' && self instanceof WorkerGlobalScope) { 
      // TODO: Replace any with WorkerGlobalScope from lib.webworker.d.ts #3492 
      globalScope = self; 
     } 
     else { 
      globalScope = global; 
     } 
    } 
    else { 
     globalScope = window; 
    } 
    // Need to declare a new variable for global here since TypeScript 
    // exports the original value of the symbol. 
    var _global = globalScope; 
    // TODO: remove calls to assert in production environment 
    // Note: Can't just export this and import in in other files 
    // as `assert` is a reserved keyword in Dart 
    _global.assert = function assert(condition) { 
     // TODO: to be fixed properly via #2830, noop for now 
    }; 

    /** 
    * @license 
    * Copyright Google Inc. All Rights Reserved. 
    * 
    * Use of this source code is governed by an MIT-style license that can be 
    * found in the LICENSE file at https://angular.io/license 
    */ 
    var __extends$1 = (this && this.__extends) || function (d, b) { 
     for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; 
     function __() { this.constructor = d; } 
     d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __()); 
    }; 
    /** 
    * An implementation of ResourceLoader that uses a template cache to avoid doing an actual 
    * ResourceLoader. 
    * 
    * The template cache needs to be built and loaded into window.$templateCache 
    * via a separate mechanism. 
    */ 
    var CachedResourceLoader = (function (_super) { 
     __extends$1(CachedResourceLoader, _super); 
     function CachedResourceLoader() { 
      _super.call(this); 
      this._cache = _global.$templateCache; 
      if (this._cache == null) { 
       throw new Error('CachedResourceLoader: Template cache was not found in $templateCache.'); 
      } 
     } 
     CachedResourceLoader.prototype.get = function (url) { 
      if (this._cache.hasOwnProperty(url)) { 
       return Promise.resolve(this._cache[url]); 
      } 
      else { 
       return Promise.reject('CachedResourceLoader: Did not find cached template for ' + url); 
      } 
     }; 
     return CachedResourceLoader; 
    }(_angular_compiler.ResourceLoader)); 

    var __platform_browser_dynamic_private__ = { 
     INTERNAL_BROWSER_DYNAMIC_PLATFORM_PROVIDERS: INTERNAL_BROWSER_DYNAMIC_PLATFORM_PROVIDERS, 
     ResourceLoaderImpl: ResourceLoaderImpl 
    }; 

    /** 
    * @experimental 
    */ 
    var RESOURCE_CACHE_PROVIDER = [{ provide: _angular_compiler.ResourceLoader, useClass: CachedResourceLoader }]; 
    /** 
    * @stable 
    */ 
    var platformBrowserDynamic = _angular_core.createPlatformFactory(_angular_compiler.platformCoreDynamic, 'browserDynamic', INTERNAL_BROWSER_DYNAMIC_PLATFORM_PROVIDERS); 

    exports.RESOURCE_CACHE_PROVIDER = RESOURCE_CACHE_PROVIDER; 
    exports.platformBrowserDynamic = platformBrowserDynamic; 
    exports.__platform_browser_dynamic_private__ = __platform_browser_dynamic_private__; 

})); 
})(System, System);