如何使用javascript获取运行应用程序的主机IP和端口号 [英] how to get host IP and port number on which the application is running using javascript

问题描述

任何人都可以告诉我如何使用javascript获取运行Web应用程序的主机IP和端口号（例如127.0.0.1:8080）

can anyone tell me how to get host IP and port number on which the web application is running using javascript (e.g. 127.0.0.1:8080)

推荐答案

我担心无法通过Javascript直接获取IP地址。它没有在 window.location 对象中公开。

I'm afraid it's not possible to directly obtain the IP address via Javascript. It's not exposed in the window.location object.

部分原因是随后访问地址：port 在语义上与访问 hostname：port 不同 - 它们在技术上是不同的URL。

Part of the reason for that is that subsequently accessing address:port is not semantically the same as accessing hostname:port - they are technically different URLs.

如果你真正追求的是当前webapp下载的URL的主机部分，你需要：

If what you're actually after is the host portion of the URL from which the current webapp was downloaded, you need:

window.location.hostname
window.location.port

如果使用默认端口，后者可能为空白，因此您还需要阅读：

The latter could be blank if the "default" port is being used, so you would also need to read:

window.location.protocol

并检查它是否是 http：（即端口80）或 https：（端口443）。

and check whether it's http: (i.e. port 80) or https: (port 443).

您还可以使用：

window.location.host

将包含主机名和端口作为冒号 - 分隔字符串，与上述相同的警告，如果通过协议的默认端口访问内容，则将省略：port 部分。

which will contain both the hostname and the port as colon-separated strings, with the same caveat as above that the :port section will be omitted if the content was accessed via the "default" port for the protocol.

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