javascript - 使用 AJAX 仅从文件中检索特定字节范围

Question

这可能吗？我认为只要服务器支持恢复(HTTP 范围)就应该如此。

Answer 1

使用XMLHttpRequest.prototype.setRequestHeader()设置 RANGE 请求 header :

//Our AJAX object:
var req = new XMLHttpRequest();
req.open([REQUEST METHOD], [REQUEST URI], true);
//Set the RANGE header here:
req.setRequestHeader("RANGE", "value-of-RANGE-header");
// [Here, set anything else you need before sending the request, like onstatechange]
//Now, send!
req.send();