如何做angular2：$ httpProvider.defaults.headers.common = {} [英] how to do in angular2: $httpProvider.defaults.headers.common = {}

问题描述

我有这个代码：

客户端（angular2）托管在这个网址上：

client (angular2) hosted on this url:

http://localhost:8080/Me/html/pages/gasolina/country/USA

代码：

  return this.http
          .post(this.supporToolSaveUrl, gasConfigModel, {headers: headers})
          .map(res => res.json())
          .subscribe(
            data => {
              console.info("next: ");
              console.info(data)
            },
            err => console.error(err)
          );

server（java jersey）

server (java jersey)

托管在这个网址上：

http://localhost:8080/Me/services/countries

代码：

 @Path("/SaveConfig")
    @POST
    @Consumes(MediaType.APPLICATION_JSON + ";charset=utf-8")
    @Produces(MediaType.APPLICATION_JSON + ";charset=utf-8")
    public void saveConfig(CountryGasStationConfig countryGasStationConfig) throws Exception {

我应该在jersy注释中添加这些？

should i add these in jersy annotation?

当我在本地运行时出现此错误：

When i run locally i get this error:

MLHttpRequest cannot load http://locahost:8080/.... Response for preflight is invalid (redirect)

我看到了这个发布和这篇文章

I saw this post and this post

我怎样才能做到他在angular2中的解决方案？

How can i make this solution in angular2?

app。

config(['$httpProvider', function ($httpProvider) {
  //Reset headers to avoid OPTIONS request (aka preflight)
  $httpProvider.defaults.headers.common = {};
  $httpProvider.defaults.headers.post = {};
  $httpProvider.defaults.headers.put = {};
  $httpProvider.defaults.headers.patch = {};
}]);

推荐答案

您的java服务器已禁用CORS请求。在客户端更改请求将不起作用，因为在另一个URL上请求服务器时会自动创建OPTIONS请求（即使它只是localhost上的其他端口）。你无法解决这个问题。

Your java server has CORS requests disabled. Changing your requests on the client side will not work, because OPTIONS requests are automatically created when requesting a server on another URL (even if it's just a different port on localhost). There's no way you can get around this.

相反，你应该在java服务器上启用CORS。 这是java jersey的教程，它还详细介绍了CORS是什么。

Instead, you should enable CORS on your java server. Here's a tutorial for java jersey that also goes into details about what CORS is.

这篇关于如何做angular2：$ httpProvider.defaults.headers.common = {}的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！