URL最长是多少?

最新推荐文章于 2022-12-09 12:52:14 发布

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最新推荐文章于 2022-12-09 12:52:14 发布

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本文讨论了HTTP协议中URI长度的实际限制。虽然HTTP协议本身没有明确规定URI的最大长度，但实际应用中浏览器和服务器通常会对过长的URL进行限制。文章建议避免使用超过2000字符的URL以确保大多数用户的兼容性。

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What is the maximum length of a URL?

RFC 2616 (Hypertext Transfer Protocol HTTP/1.1) section 3.2.1 says

The HTTP protocol does not place any a priori limit on the length of
a URI. Servers MUST be able to handle the URI of any resource they serve, and SHOULD be able to handle URIs of unbounded length if they provide GET-based forms that could generate such URIs. A server SHOULD return 414 (Request-URI Too Long) status if a URI is longer than the server can handle (see section 10.4.15).

Note: Servers ought to be cautious about depending on URI lengths above 255 bytes, because some older client or proxy implementations might not properly support these lengths.

That's what the standards say. For the reality, see this research over at boutell.com to see what individual browser and server implementations will support. It's worth a read, but the executive summary is:

Extremely long URLs are usually a mistake. URLs over 2,000 characters will not work in the most popular web browser. Don't use them if you intend your site to work for the majority of Internet users.