如何在服务中自动更改URL，更改URL后将影响所有组件，而无需在angular6中保存/构建/运行 [英] How to change URLs automatically in services, after changing URL it should affect to all components without saving/ building/running in angular6

问题描述

我们正在托管一个角度为6的新应用程序，并且我们有许多服务器具有diff URL，我想自动更改它们(例如Java中的.property文件).在谷歌搜索后，我得到了一些答案，例如更改environment.ts文件中的路径，因此它将影响所有组件.但这并不完全符合我的要求，这意味着如果我在environment.ts文件中更改URL，我们应该保存该文件，并且需要再次对其进行编译.因此，这正是我面临的问题，我不想保存/编译文件.

We are hosting a new application with angular 6 and we have many servers with diff URLs, i want to change them automatically(like .property file in java). after searching in google i got some answers like changing paths in environment.ts file, so it will affect to all components. but its not exactly my requirements, means if i change URL in environment.ts file, we should save the file and we need to compile it once again. So exactly this is the problem i am facing, i don't want to save / compile the file.

在这种情况下请帮助我.

Please help me in this situation.

service.ts文件.

service.ts file.

emplLoginCheckUrl = this.baseUrl+"/checkValidUser";

我试图从environment.ts文件中更改基本URL，它可以正常工作，但是在保存文件后，我不想保存文件，它应该自动更改.

i tried to change base url from environment.ts file, its working correctly but after saving the file, i dont want want save file it should change automatically.

.service.ts文件.

.service.ts file.

 emplLoginCheckUrl = this.baseUrl+"/checkValidUser";

       validateUserDetails(employeeDetails): Observable<any> {
            console.log(this.baseUrl);
            return this._httpClinet.post(this.emplLoginCheckUrl, employeeDetails);
        }

environment.ts文件.

environment.ts file.

export const environment = {
  production: false,
  baseUrl: "http://rest/somerestservice"
};

预期:

URL应该自动更改，而无需一次又一次地保存/运行/编译/构建，因为只有一次我可以在托管时进行保存/运行/编译/构建.托管后，如果我想更改URL，我不能去那里，更改路径并不能再次编译它.

URLs should change automatically without saving/running/compiling/building again and again, because only one time I can do saving/running/compiling/building while hosting. after hosting if I want to change URLs I can't go there, change the path and cant compile it once again.

推荐答案

这基本上是众所周知的文件"模式.这是Web服务器上公开配置信息的路径.应用程序在引导时必须通过HTTP请求获取实时配置，并且可以通过重新获取数据来刷新配置.

This is basically the "well known file" pattern. It's a path on a web server that exposes config information. The applications have to fetch the live config via a HTTP request while they are bootstrapping, and can refresh the config by re-fetching the data.

https://ma.ttias.be/well-known-directory-webservers-aka-rfc-5785/

它基于IETF RFC:

It's based on an IETF RFC:

https://tools.ietf.org/html/rfc5785

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