Question

我在aspnet mvc中有一个返回FileContentResult的动作。我注意到当fileDownloadName包含变音符号（即åäöü）时，Internet Explorer根本无法读取文件名。

我试过UrlEncoding：

return this.File(document.Content, contentType, Server.UrlEncode(document.Name));

但随后所有空格都被加号（+）替换。

有没有办法让unicode文件名与IE一起使用（保持原始文件名不变）？

这就是我目前正在使用的黑客行为：

return this.File(
    document.Content, 
    contentType, 
    Server.UrlEncode(document.Name).Replace('+',' '));

（这在IE中将空格渲染为下划线）

Answer 1

UrlEncode具有误导性名称，仅适用于表单数据。您可能需要UrlPathEncode来解决+问题。有关背景信息，请参阅this question。
但是，无论如何，URL编码在这里是错误的，因为您没有构建URL。它在IE中运行的事实是一个错误，这就是为什么你在其他浏览器中获得% - 序列的原因。

不幸的是，没有可靠的跨浏览器方式将非ASCII字符转换为Content-Disposition文件名参数。从理论上讲，使用RFC 2331规则可能是可能的，但即便如此，规范也是有争议的，现实并没有支持它。有关背景信息，请参阅this question。

有没有办法让unicode文件名与IE一起工作（保持原始文件名不变）？

从filename标题中删除Content-Disposition参数，而是将文件名作为脚本地址的尾随路径部分包含在内，使用URL编码非常有效（UTF-8和{{ 1}}）。例如，对于UrlPathEncode控制器：

someaction

所有浏览器都会将结果文件保存为http://www.example.com/someaction/åäöü.txt http://www.example.com/someaction/%C3%A5%C3%A4%C3%B6%C3%BC.txt。

Answer 2

对于回复，我使用来自this thread的解决方案。也许你可以试着像

一样使用它

return this.File(
  document.Content,
  contentType,
  "\"" + Server.UrlEncode(document.Name) + "\"");

或

return this.File(
  document.Content,
  contentType,
  "\"" + document.Name + "\"");

Answer 3

只需按照您的方式对文件名进行编码，然后将所有+替换为%20。未经测试，但应该工作。

Answer 4

我已尝试过编码内容，在Chrome和FF中运行良好，但在IE上遇到了麻烦。所以我想出了自己的清洁程序。基本上它只是一个映射表，因为我们不只是想删除所有特殊字符。

//http://www.pjb.com.au/comp/diacritics.html
private static string[,] CharacterReplacements = { 
    { " ", "-"},
    { "&", "-"},
    { "?", "-"},
    { "!", "-"},
    { "%", "-"},
    { "+", "-"},
    { "#", "-"},
    { ":", "-"},
    { ";", "-"},
    { ".", "-"},

    { "¢", "c" },   //cent
    { "£", "P" },   //Pound
    { "€", "E" },   //Euro
    { "¥", "Y" },   //Yen
    { "°", "d" },   //degree
    { "¼", "1-4" }, //fraction one-quarter
    { "½", "1-2" }, //fraction half    
    { "¾", "1-3" }, //fraction three-quarters}
    { "@", "AT)"}, //at                                                  
    { "Œ", "OE" },  //OE ligature, French (in ISO-8859-15)        
    { "œ", "oe" },  //OE ligature, French (in ISO-8859-15)        

    {"Å","A" },  //ring
    {"Æ","AE"},  //diphthong
    {"Ç","C" },  //cedilla
    {"È","E" },  //grave accent
    {"É","E" },  //acute accent
    {"Ê","E" },  //circumflex accent
    {"Ë","E" },  //umlaut mark
    {"Ì","I" },  //grave accent
    {"Í","I" },  //acute accent
    {"Î","I" },  //circumflex accent
    {"Ï","I" },  //umlaut mark
    {"Ð","Eth"}, //Icelandic
    {"Ñ","N" },  //tilde
    {"Ò","O" },  //grave accent
    {"Ó","O" },  //acute accent
    {"Ô","O" },  //circumflex accent
    {"Õ","O" },  //tilde
    {"Ö","O" },  //umlaut mark
    {"Ø","O" },  //slash
    {"Ù","U" },  //grave accent
    {"Ú","U" },  //acute accent
    {"Û","U" },  //circumflex accent
    {"Ü","U" },  //umlaut mark
    {"Ý","Y" },  //acute accent
    {"Þ","eth"}, //Icelandic - http://en.wikipedia.org/wiki/Thorn_(letter)
    {"ß","ss"},  //German

    {"à","a" },  //grave accent
    {"á","a" },  //acute accent
    {"â","a" },  //circumflex accent
    {"ã","a" },  //tilde
    {"ä","ae"},  //umlaut mark
    {"å","a" },  //ring
    {"æ","ae"},  //diphthong
    {"ç","c" },  //cedilla
    {"è","e" },  //grave accent
    {"é","e" },  //acute accent
    {"ê","e" },  //circumflex accent
    {"ë","e" },  //umlaut mark
    {"ì","i" },  //grave accent
    {"í","i" },  //acute accent
    {"î","i" },  //circumflex accent
    {"ï","i" },  //umlaut mark
    {"ð","eth"}, //Icelandic
    {"ñ","n" },  //tilde
    {"ò","o" },  //grave accent
    {"ó","o" },  //acute accent
    {"ô","o" },  //circumflex accent
    {"õ","o" },  //tilde
    {"ö","oe"},  //umlaut mark
    {"ø","o" },  //slash
    {"ù","u" },  //grave accent
    {"ú","u" },  //acute accent
    {"û","u" },  //circumflex accent
    {"ü","ue"},  //umlaut mark
    {"ý","y" },  //acute accent
    {"þ","eth"}, //Icelandic - http://en.wikipedia.org/wiki/Thorn_(letter)
    {"ÿ","y" },  //umlaut mark
    };

我把它包装成一个函数，你可以在这里找到代码：
http://remy.supertext.ch/2012/08/clean-filenames/

IE中的有效文件名（下载）？

4 个答案: