在 IIS URL Rewrite 2.0 中，为啥 HTTP_HOST 包含端口号？

Posted 2023-03-05

【中文标题】在 IIS URL Rewrite 2.0 中，为啥 HTTP_HOST 包含端口号？

【英文标题】：In IIS URL Rewrite 2.0, why does HTTP_HOST include the port number?在 IIS URL Rewrite 2.0 中，为什么 HTTP_HOST 包含端口号？

【发布时间】：2013-10-15 22:28:12

【问题描述】：

我正在尝试在 Windows 8.1 上将 IIS URL Rewrite 2.0 与 IIS 8.5 一起使用。根据Accessing URL Parts from a Rewrite Rule，

For an HTTP URL in this form: http(s)://<host>:<port>/<path>?<querystring>

• The <path> is matched against the pattern of the rule.
• The <querystring> is available in the server variable called QUERY_STRING and can be accessed by using a condition within a rule.
• The <host> is available in the server variable HTTP_HOST and can be accessed by using a condition within a rule.
• The <port> is available in the server variable SERVER_PORT and can be accessed by using a condition within a rule.
• Server variables SERVER_PORT_SECURE and HTTPS can be used to determine if a secure connection was used. These server variables can be accessed by using a condition within a rule.
• The server variable REQUEST_URI can be used to access the entire requested URL path, including the query string.

为了测试，这是我使用的规则：

<rule name="Test" stopProcessing="true">
  <action type="Redirect" url="http://localhost/?HTTP_HOST" redirectType="Temporary" />
</rule>

然后我使用 Fiddler 中的 Composer 选项卡创建以下请求：

http://localhost.localdomain:65352/

IIS 响应的

HTTP/1.1 307 Moved Temporarily
Location: http://localhost/?localhost.localdomain:65352

从这里我们可以看到端口号包含在 HTTP_HOST 变量中，与上面引用的文档相反。这给我的匹配规则增加了一些复杂性，因为我必须考虑端口号的可选存在。如何获取没有端口号的主机名？

【问题讨论】：

仅供参考：我创建了一个问题here。

【参考方案1】：

很遗憾，我无法告诉你为什么会这样；但我可以告诉你，使用 SERVER_NAME 而不是 HTTP_HOST 为我解决了这个问题。

见：https://serverfault.com/a/418530/3495