Anglarjs2-Http获取请求:错误:无法解析URL ..原始错误:无法读取[null]中未定义的属性"split" [英] Anglarjs2 - Http get request : Error: unable to parse url ..original error: Cannot read property 'split' of undefined in [null]

问题描述

当我在Hero.service.ts中使用get Url作为Web api时，在浏览器控制台中出现以下错误.但是，当我在那个项目中使用.Json文件时，它工作正常，因为我能够在输出页面中看到值.我只是在学习angular.io网站.

Getting below error in browser console, when I'm using get Url as web api in Hero.service.ts. But It's working fine when I used with .Json file with in a that project as I'm able to see the values in output page. I'm just learning with angular.io website.

以下是控制台中的错误:

angular2-polyfills.js:471 Error: Uncaught (in promise): EXCEPTION: Error: unable to parse url 'http://md5.jsontest.com/?text=example_text'; original error: Cannot read property 'split' of undefined in [null](…)consoleError @ angular2-polyfills.js:471

Get url: http://md5.jsontest.com/?text=example_text

这是整个代码可用，

柱塞

请问我在这方面做错什么了吗?

Could you please help me what i'm doing wrong in this?

推荐答案

您的问题来自InMemoryBackendService，它需要以下URL格式(路径分为两个级别):

You problem comes from the InMemoryBackendService which expects the following URL format (two levels for path):

http://host:port/base/collectionName

在您的情况下，该服务会引发异常，因为`collectionName未定义...

In your case, the service throws an exception because `collectionName is undefined...

要使其正常工作，请使用遵循此格式的URL，或者从提供程序中删除InMemoryBackendService类:

To make it work either you use URLs that follow this format either you remove the InMemoryBackendService class from the providers:

providers: [
  HTTP_PROVIDERS,
  HeroService,
  // in-memory web api providers
  provide(XHRBackend, { useClass: InMemoryBackendService }), // <---

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