如何在浏览器的文件下载框中显示非ascii文件名？ [英] How to display a non-ascii filename in the file download box in browsers?

问题描述

文件下载的标题通常看起来像

>

内容处理：附件; filename =theasciifilename.doc

除非您在文件名参数中粉碎utf8编码的字符串，否则Firefox将处理好，而IE会抛出。 >

有一个 CodeProject上的文档，解释说编码文件名的方法

此文档将BảnKiểmKê.doc编码为B％e1％ba％a3n％20Ki％e1％bb％83m ％20K％c3％aa.doc通过十六进制编码字节。

问题＃1：该字符串中的第一个字符：ả的值为ả - 数字在十六进制，你得到％a3％1e。这个人怎么得到％e1％ba％a3？ （我显然在这里丢了一些简单的东西）

问题＃2：虽然IE承认了这个编码，但Firefox并没有！做什么？

解决方案

对问题＃1的回答：你是混淆Unicode和UTF-8。 ả的十六进制值为0xA31E，但不是UTF-8字符。在UTF-8中，字符需要三个字节， 0xE1 0xBA 0xA3 。对于非ASCII编码，URL编码定义不全，但是％e1％ba％a3是用于该字符的有效UTF-8编码。

There doesn't seem to be an accepted way of sending down a header parameter in non ascii format.

The header for file download usually looks like

Content-disposition: attachment; filename="theasciifilename.doc"

Except if you smash a utf8 encoded string in the filename parameter, Firefox will handle it fine, whereas IE will throw up.

There is a document on CodeProject that explains a method for encoding the filename.

This document encodes Bản Kiểm Kê.doc to B%e1%ba%a3n%20Ki%e1%bb%83m%20K%c3%aa.doc by hex encoding the bytes.

Problem #1: the first character in that string: ả has a value of ả -- encode that number in Hex and you get %a3%1e. How did this guy get %e1%ba%a3? (I'm obviously missing something simple here)

Problem #2: While IE acknowledges this encoding, Firefox doesn't! What to do?

解决方案

Answer to question #1: You are confusing Unicode and UTF-8. The hex value of 'ả' is 0xA31E however that is not a UTF-8 character. In UTF-8 that character requries three bytes, 0xE1 0xBA 0xA3. URL encoding is poorly defined for non-ascii encodings but %e1%ba%a3 is the valid UTF-8 encoding to use for that character.

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