Ajax 中的 GET 与 POST [英] GET vs POST in Ajax

问题描述

Ajax 请求的 GET 和 POST 有什么区别?

What is the difference between GET and POST for Ajax requests?

我看不出这两者之间有什么区别，除了当我使用 GET 时，参数是在 URL 中发送的，这对我来说没有任何区别，因为所有请求都是在后台制作，用户没有发现任何区别.

I don't see any difference between those two, except that when I use GET, the parameters are send in URL, which for me don't really make any difference, since all requests are made on background and user doesn't find any difference.

PUT 和 DELETE 方法的用途是什么?

edit: What are PUT and DELETE methods used for?

推荐答案

GET 旨在从服务器获取数据.POST(以及鲜为人知的朋友 PUT 和 DELETE)专为修改服务器上的数据而设计.

GET is designed for getting data from the server. POST (and lesser-known friends PUT and DELETE) are designed for modifying data on the server.

GET 请求不应导致从应用程序中删除数据.如果你有一个链接，你可以点击 GET 来删除数据，那么谷歌抓取你的网站就可以点击你所有的删除"链接.

A GET request should never cause data to be removed from an application. If you have a link you can click on with a GET to remove data, then Google spidering your site could click on all your "Delete" links.

可以在此处找到规范答案，其中引用了HTML 2.0 规范:

The canonical answer can be found here, which quotes the HTML 2.0 spec:

如果表单的处理是幂等的(即它没有持久的对状态的可观察影响world)，那么表单方法应该是得到.许多数据库搜索没有可见的副作用，使理想查询表单的应用.

If the processing of a form is idempotent (i.e. it has no lasting observable effect on the state of the world), then the form method should be GET. Many database searches have no visible side-effects and make ideal applications of query forms.

如果与表单处理相关的服务有副作用(例如，修改一个数据库或订阅服务)，方法应该是POST.

If the service associated with the processing of a form has side effects (for example, modification of a database or subscription to a service), the method should be POST.

在您的 AJAX 调用中，您需要使用您的服务器支持的任何方法.您应该始终设计您的服务器，以便通过 POST/PUT/DELETE 调用修改数据的操作.其他评论有指向 REST 的链接，通常将 C/R/U/D 映射到POST 或 PUT"(创建)/GET(读取)/PUT(更新)/DELETE(删除).

In your AJAX call, you need to use whatever method your server supports. You should always design your server so that operations that modify data are called by POST/PUT/DELETE. Other comments have links to REST, which generally maps C/R/U/D to "POST or PUT"(Create)/GET(Read)/PUT(Update)/DELETE(Delete).

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