2019年9月23日 · A MIME type is a string identifier composed of two parts: a type and a subtype. The "type" refers to a logical grouping of many MIME types that are closely related to each other; it's no more than a high level category. "subtypes" are specific to one file type within the "type". The x-prefix of a MIME subtype simply means that it's non-standard.

2011年3月19日 · The MIME type is a description of the data returned by a request on the Internet (originally used by e-mail, and later used by many parts of the web). Since data can take hundreds (if not thousands) of forms, both textual and binary, it helps a program to know what type of data it is dealing with, rather than trying to write code that figures ...

2012年12月5日 · MIME types follow a format: media-type/subtype-identifier. Example: image/png. The x-prefix of a subtype-identifier indicates that it is experimental and non-standard (not registered with IANA). Now about the zip specifically... application/zip is a standard MIME type for zip files, officially registered with IANA. It seems like a good first ...

2009年6月10日 · I am using EPPlus to generate .xlsx (OpenXML format based) excel file. For sending this excel file as attachment in email I use the following MIME type and it works fine with EPPlus generated file and opens properly in ms-outlook mail client preview.

2015年11月13日 · This particular topic is confusing because the varying association of file name extension associated to a MIME type depends which organization created the table of file name extensions to MIME types. In other words, file name extension .jpg could be many different things, "officially" (but in practice is always a JPEG image).

2011年1月11日 · When you are writing MIME, you separate different chunks of your message with a certain boundary. I failed for some reason to find any documentation explaining this boundary, but here's what I gathered from examples:

2009年5月28日 · The result will be a multipart-MIME message with a text/html part (if you really do it right with an alternate part of type text/plain) and several images, which are then referenced from within the HTML. See RFC 1813 and RFC 2378 for more information about content-id in mixed MIME and related data (referred by CID in the HTML source).

As other posters have said this is rarely and 'actual' MIME type issue. Usually it's a combination of badly defined public / static file config and poorly liked files.

2016年5月26日 · The MIME type specifies your intent. If you know that what you're sending is supposed to be a png image, pass that information along. If the bytes accidentally represent a jpeg, your application can warn you that it's not a valid png, and that you have a …

This is probably OS and possibly browser dependent, but on Windows, the MIME type for a given file extension can be found by looking in the registry under HKCR: For example: HKEY_CLASSES_ROOT.zip - ContentType. To go from MIME to file extension, you can look at the keys under. HKEY_CLASSES_ROOT\Mime\Database\Content Type