xmlhttprequest 级别 2 的最大文件上传大小是多少?
使用 HTML5 的 xmlhttprequest 级别 2 的最大文件上传大小是多少?
What is the maximum file upload size with xmlhttprequest level 2 with HTML5?
推荐答案
XMLHttpRequest 规范 没有提到对上传大小的任何限制.
The XMLHttpRequest specification does not mention any limits on the upload size.
实际上,上传请求受限于:
In practise, upload requests are limited by:
- 同时上传的数量:如何流行的浏览器允许许多并发 AJAX (XmlHttpRequest) 请求?
- 网络服务器上配置的限制,例如.
LimitRequestBody
在 Apache 上,client_max_body_size
. - 服务器端脚本环境的限制,例如
upload_max_filesize
和post_max_size
在 PHP 中. - 内存限制(错误,客户端或服务器端).
- The number of simultaneous uploads: How many concurrent AJAX (XmlHttpRequest) requests are allowed in popular browsers?
- The configured limit on the web server, eg.
LimitRequestBody
on Apache,client_max_body_size
on Nginx. - The limits in the server-side scripting environment, e.g.
upload_max_filesize
andpost_max_size
in PHP. - Memory limits (bugs, client-side or server-side).
另见:
- 使用 XmlHttpRequest 发送文件:流式传输?
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