使用Javascript从外部文件读取UTF-8特殊字符 [英] Read UTF-8 special chars from external file using Javascript

问题描述

我有一个UTF-8编码的文件"myFile.aaa"，其不可打印的字符由十六进制x80(十进制128)表示.

I have a UTF-8 encoded file "myFile.aaa" with non-printable char represented by hexadecimal x80 (decimal 128).

我需要开发一个Javascript函数，该函数将从myFile.aaa中读取此char并返回其十进制值128.

I need to develop a Javascript function that will read this char from myFile.aaa and return its decimal value, 128.

有可能这样做吗?怎么样?

Is it possible to do that? How?

如果将myFile.aaa内容复制到"var data"，然后执行"data[0].charCodeAt(0)"，则得到的值是8364，而不是128.

If I copy myFile.aaa content to "var data", and do "data[0].charCodeAt(0)" I get value 8364 instead of 128.

谢谢

推荐答案

我认为您的UTF-8编码没有意义，因此，我将告诉您我找到的处理狡猾AJAX的最佳方法数据.将内容类型设置为用户定义:

I don't think your UTF-8 encoding makes sense, so I'm going to tell you the best way I've found of dealing with dodgy AJAX data. Set the content type as user-defined:

var req = new XMLHttpRequest();
req.overrideMimeType('text/plain; charset=x-user-defined')

然后，您可以将文件读取为纯字节而不是编码字符.

You can then just read the file as plain bytes instead of encoded characters.

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