输入元素的自定义mime类型
[英]Custom mime type for input element
问题描述
According to the spec at https://www.w3.org/wiki/HTML/Elements/input/file 
根据https://www.w3.org/wiki/HTML/Elements/input/file上的规范
The "accept" attribute is a series of MIME types. “ accept”属性是一系列MIME类型。
In this case (ie the file is not coming from a server), is it possible to set a custom MIME type for a certain file extension or binary file peeking (eg some procedure to read the header)? 在这种情况下（即文件不是来自服务器），是否可以为某个文件扩展名或二进制文件窥视设置自定义MIME类型（例如，读取标头的某些过程）？
1 个解决方案
解决方案1
1 2017-09-04 15:13:05
Yes, you can set custom MIME types. 是的，你可以设置自定义MIME类型。
The Living Standard specification states "The accept attribute may be specified to provide user agents with a hint of what file types will be accepted." 生活标准规范指出： “可以指定accept属性，以向用户代理提示将接受哪种文件类型。”
To use this, use the following <input type="file" name="example" accept= "your-custom-extension-1, your-custom-extension-2, your-custom-extension-3"> 要使用此功能，请使用以下<input type="file" name="example" accept= "your-custom-extension-1, your-custom-extension-2, your-custom-extension-3">
In addition, read the following statement about the accept attribute : "If the value of the type attribute is file, then this attribute will indicate the types of files that the server accepts, otherwise it will be ignored". 另外，请阅读以下有关accept 属性的声明：“如果type属性的值为file，则此属性将指示服务器接受的文件类型，否则将被忽略”。
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