Role of MIME
MIME is short for Multipurpose Internet Mail Extensions, a specification for formatting non-ASCII messages so that they can be sent over the Internet. Many e-mail clients now support MIME, which enables them to send and receive graphics, audio, and video files via the Internet mail system.
There are many predefined MIME types, such as GIF graphics files and PostScript files. It is also possible to define your own MIME types.
In addition to e-mail applications, Web browsers also support various MIME types. This enables the browser to display or output files that are not in HTML format.
MIME was defined in 1992 by the Internet Engineering Task Force (IETF).
Role of MIME in IIS 6.0
IIS 6.0 does not serve unknown MIME types
When you request a file from an IIS 6.0 Web server, and the file has a file name extension that is not a defined MIME type on the Web server, we will receive the following error message:
HTTP Error 404 - File or directory not found.
CAUSE
The earlier versions of IIS include a wildcard character MIME mapping, which permits IIS to serve any file regardless of its extension. IIS 6.0 does not include this wildcard character MIME mapping and does not serve any type of extension that is not defined at the MimeMap node in the IIS metabase.
To Resolve this we need to follow these steps
1. Open the IIS Microsoft Management Console (MMC), right-click the local computer name, and then click Properties.
2. Click MIME Types.
3. Click New.
4. In the Extension box, type the file name extension that you want (for example, .mp4).
5. In the MIME Type box, type .mp4/video/mp4
6. Apply the new settings. Note that we must restart the World Wide Web Publishing Service or wait for the worker process to recycle for the changes to take effect. In this example, IIS now serves files with the .mp4 extension.
If we want to serve all files regardless of the file name extension (for example, if we cannot predict all files that will be served), then need to follow these steps to add a wildcard character mapping:
1. Open the IIS Microsoft Management Console (MMC), right-click the local computer name, and then click Properties.
2. Click MIME Types.
3. Click New.
4. In the Extension box, type an asterisk (*).
5. In the MIME Type box, type application/octet-stream.
6. Apply the new settings. Note that we must restart the World Wide Web Publishing Service or wait for the worker process to recycle for the changes to take effect.
Note:- In addition to making these changes at the global level in IIS, we can add necessary MIME types at lower levels in the metabase. When we do this, we can specify the sites or directories that are permitted to serve content with a specific file name extension instead of globally allowing all sites to serve that extension.
MIME is short for Multipurpose Internet Mail Extensions, a specification for formatting non-ASCII messages so that they can be sent over the Internet. Many e-mail clients now support MIME, which enables them to send and receive graphics, audio, and video files via the Internet mail system.
There are many predefined MIME types, such as GIF graphics files and PostScript files. It is also possible to define your own MIME types.
In addition to e-mail applications, Web browsers also support various MIME types. This enables the browser to display or output files that are not in HTML format.
MIME was defined in 1992 by the Internet Engineering Task Force (IETF).
| File type | MIME type |
| ai | application/postscript |
| aif | audio/x-aiff |
| aifc | audio/x-aiff |
| aiff | audio/x-aiff |
| asc | text/plain |
| atom | application/atom+xml |
| au | audio/basic |
| avi | video/x-msvideo |
| bcpio | application/x-bcpio |
| bin | application/octet-stream |
| bmp | image/bmp |
| cdf | application/x-netcdf |
| cgm | image/cgm |
| class | application/octet-stream |
| cpio | application/x-cpio |
| cpt | application/mac-compactpro |
| csh | application/x-csh |
| css | text/css |
| dcr | application/x-director |
| dif | video/x-dv |
| dir | application/x-director |
| djv | image/vnd.djvu |
| djvu | image/vnd.djvu |
| dll | application/octet-stream |
| dmg | application/octet-stream |
| dms | application/octet-stream |
| doc | application/msword |
| dtd | application/xml-dtd |
| dv | video/x-dv |
| dvi | application/x-dvi |
| dxr | application/x-director |
| eps | application/postscript |
| etx | text/x-setext |
| exe | application/octet-stream |
| ez | application/andrew-inset |
| gif | image/gif |
| gram | application/srgs |
| grxml | application/srgs+xml |
| gtar | application/x-gtar |
| hdf | application/x-hdf |
| hqx | application/mac-binhex40 |
| htm | text/html |
| html | text/html |
| ice | x-conference/x-cooltalk |
| ico | image/x-icon |
| ics | text/calendar |
| ief | image/ief |
| ifb | text/calendar |
| iges | model/iges |
| igs | model/iges |
| jnlp | application/x-java-jnlp-file |
| jp2 | image/jp2 |
| jpe | image/jpeg |
| jpeg | image/jpeg |
| jpg | image/jpeg |
| js | application/x-javascript |
| kar | audio/midi |
| latex | application/x-latex |
| lha | application/octet-stream |
| lzh | application/octet-stream |
| m3u | audio/x-mpegurl |
| m4a | audio/mp4a-latm |
| m4b | audio/mp4a-latm |
| m4p | audio/mp4a-latm |
| m4u | video/vnd.mpegurl |
| m4v | video/x-m4v |
| mac | image/x-macpaint |
| man | application/x-troff-man |
| mathml | application/mathml+xml |
| me | application/x-troff-me |
| mesh | model/mesh |
| mid | audio/midi |
| midi | audio/midi |
| mif | application/vnd.mif |
| mov | video/quicktime |
| movie | video/x-sgi-movie |
| mp2 | audio/mpeg |
| mp3 | audio/mpeg |
| mp4 | video/mp4 |
| mpe | video/mpeg |
| mpeg | video/mpeg |
| mpg | video/mpeg |
| mpga | audio/mpeg |
| ms | application/x-troff-ms |
| msh | model/mesh |
| mxu | video/vnd.mpegurl |
| nc | application/x-netcdf |
| oda | application/oda |
| ogg | application/ogg |
| pbm | image/x-portable-bitmap |
| pct | image/pict |
| pdb | chemical/x-pdb |
| application/pdf | |
| pgm | image/x-portable-graymap |
| pgn | application/x-chess-pgn |
| pic | image/pict |
| pict | image/pict |
| png | image/png |
| pnm | image/x-portable-anymap |
| pnt | image/x-macpaint |
| pntg | image/x-macpaint |
| ppm | image/x-portable-pixmap |
| ppt | application/vnd.ms-powerpoint |
| ps | application/postscript |
| qt | video/quicktime |
| qti | image/x-quicktime |
| qtif | image/x-quicktime |
| ra | audio/x-pn-realaudio |
| ram | audio/x-pn-realaudio |
| ras | image/x-cmu-raster |
| rdf | application/rdf+xml |
| rgb | image/x-rgb |
| rm | application/vnd.rn-realmedia |
| roff | application/x-troff |
| rtf | text/rtf |
| rtx | text/richtext |
| sgm | text/sgml |
| sgml | text/sgml |
| sh | application/x-sh |
| shar | application/x-shar |
| silo | model/mesh |
| sit | application/x-stuffit |
| skd | application/x-koan |
| skm | application/x-koan |
| skp | application/x-koan |
| skt | application/x-koan |
| smi | application/smil |
| smil | application/smil |
| snd | audio/basic |
| so | application/octet-stream |
| spl | application/x-futuresplash |
| src | application/x-wais-source |
| sv4cpio | application/x-sv4cpio |
| sv4crc | application/x-sv4crc |
| svg | image/svg+xml |
| swf | application/x-shockwave-flash |
| t | application/x-troff |
| tar | application/x-tar |
| tcl | application/x-tcl |
| tex | application/x-tex |
| texi | application/x-texinfo |
| texinfo | application/x-texinfo |
| tif | image/tiff |
| tiff | image/tiff |
| tr | application/x-troff |
| tsv | text/tab-separated-values |
| txt | text/plain |
| ustar | application/x-ustar |
| vcd | application/x-cdlink |
| vrml | model/vrml |
| vxml | application/voicexml+xml |
| wav | audio/x-wav |
| wbmp | image/vnd.wap.wbmp |
| wbmxl | application/vnd.wap.wbxml |
| wml | text/vnd.wap.wml |
| wmlc | application/vnd.wap.wmlc |
| wmls | text/vnd.wap.wmlscript |
| wmlsc | application/vnd.wap.wmlscriptc |
| wrl | model/vrml |
| xbm | image/x-xbitmap |
| xht | application/xhtml+xml |
| xhtml | application/xhtml+xml |
| xls | application/vnd.ms-excel |
| xml | application/xml |
| xpm | image/x-xpixmap |
| xsl | application/xml |
| xslt | application/xslt+xml |
| xul | application/vnd.mozilla.xul+xml |
| xwd | image/x-xwindowdump |
| xyz | chemical/x-xyz |
| zip | application/zip |
Role of MIME in IIS 6.0
IIS 6.0 does not serve unknown MIME types
When you request a file from an IIS 6.0 Web server, and the file has a file name extension that is not a defined MIME type on the Web server, we will receive the following error message:
HTTP Error 404 - File or directory not found.
CAUSE
The earlier versions of IIS include a wildcard character MIME mapping, which permits IIS to serve any file regardless of its extension. IIS 6.0 does not include this wildcard character MIME mapping and does not serve any type of extension that is not defined at the MimeMap node in the IIS metabase.
To Resolve this we need to follow these steps
1. Open the IIS Microsoft Management Console (MMC), right-click the local computer name, and then click Properties.
2. Click MIME Types.
3. Click New.
4. In the Extension box, type the file name extension that you want (for example, .mp4).
5. In the MIME Type box, type .mp4/video/mp4
6. Apply the new settings. Note that we must restart the World Wide Web Publishing Service or wait for the worker process to recycle for the changes to take effect. In this example, IIS now serves files with the .mp4 extension.
If we want to serve all files regardless of the file name extension (for example, if we cannot predict all files that will be served), then need to follow these steps to add a wildcard character mapping:
1. Open the IIS Microsoft Management Console (MMC), right-click the local computer name, and then click Properties.
2. Click MIME Types.
3. Click New.
4. In the Extension box, type an asterisk (*).
5. In the MIME Type box, type application/octet-stream.
6. Apply the new settings. Note that we must restart the World Wide Web Publishing Service or wait for the worker process to recycle for the changes to take effect.
Note:- In addition to making these changes at the global level in IIS, we can add necessary MIME types at lower levels in the metabase. When we do this, we can specify the sites or directories that are permitted to serve content with a specific file name extension instead of globally allowing all sites to serve that extension.
Great Information, thanks :)
ReplyDelete