PHP上传文件使用PUT而不是POST

Question

I read something about this on PHP docs , but it's not clear to me:

1. Do the most widely used browsers (IE, FF, Chrome, Safari, Opera, ...) support this PUT method to upload files?

2. What HTML should I write to make the browser call the server via a PUT request? I mean do I need to write a FORM with an INPUT file field and just replace the attribute method="POST" with method="PUT" ?

3. On the PHP docs (link above) they say a PUT request is much simpler than a POST request when uploading file, along with this advantage, what other advantages/disadvanatges do the PUT has got compared to the POST ?

Answer 1

The PUT method cannot be used from a <form>. MSIE does not support it through the user GUI at all. You can however use XMLHttpRequest . It seems to be defined in the standard and WHATWG / HTML5. My browser (Opera) obviously likes it.

http://old.mnot.net/javascript/xmlhttprequest/ IE might work too, as a short Google search suggests. And Firefox looks fine. Not checked Chrome or Webkit.

Server-site you need a specially designated script to handle an incoming PUT request. Look into the Apache docs. A mod_rewrite rule might usually do. The genral adavantage of PUT is that there is no file encoding / marshalling into a multipart/* mime type required. In theory this allows uploading larger files more reliably. Allthough if you use PHP, it won't help you much. It's meant for Webservers with WebDAV support and/or direct filesystem write access. (Apache can save uploaded files itself, if you use that.)

Answer 2

I think the method is supported by most major browsers, but you can't account for every browser and other client that is out there. From a cursory look at the user contributed notes, this sometimes even needs server-side configuration to work.

Also, handling any additional form values you may want to send along with your file becomes more difficult.

I wouldn't use it. Way too much possible hassle for little actual gain.

Answer 3

PUT没有被浏览器广泛支持，并且通常不用于交互式HTML表单。

Answer 4

PUT很少用于此目的且仅受主要浏览器支持的事实将其排除在此处的任何可能用途之外。