What are all the possible values for HTTP Content-Type header

Question

I have to validate the Content-Type header value before passing it to an HTTP request   Is there a specific list for all the possible values of Content-Type   Otherwise  is there a way to validate the content type before using it in an HTTP request

User · Answer

I would aim at covering a subset of possible "Content-type" values, you question seems to focus on identifying known content types.

@Jeroen RFC 1341 reference is great, but for an fairly exhaustive list IANA keeps a web page of officially registered media types here.

User · Answer

If you are using jaxrs or any other  then there will be a class called mediatype User interceptor before sending the request and compare it against this

User · Answer

You can find every content type here  http   www iana org assignments media-types media-types xhtml  The most common type are    Type application   application java-archive application EDI-X12    application EDIFACT    application javascript    application octet-stream    application ogg    application pdf   application xhtml xml    application x-shockwave-flash     application json   application ld json   application xml    application zip   application x-www-form-urlencoded    Type audio   audio mpeg    audio x-ms-wma    audio vnd rn-realaudio    audio x-wav     Type image  image gif    image jpeg    image png    image tiff     image vnd microsoft icon     image x-icon    image vnd djvu    image svg xml      Type multipart   multipart mixed     multipart alternative    multipart related  using by MHTML  HTML mail      multipart form-data    Type text      text css     text csv     text html     text javascript  obsolete      text plain     text xml      Type video   video mpeg     video mp4     video quicktime     video x-ms-wmv     video x-msvideo     video x-flv    video webm     Type vnd     application vnd android package-archive application vnd oasis opendocument text     application vnd oasis opendocument spreadsheet   application vnd oasis opendocument presentation    application vnd oasis opendocument graphics    application vnd ms-excel     application vnd openxmlformats-officedocument spreadsheetml sheet    application vnd ms-powerpoint     application vnd openxmlformats-officedocument presentationml presentation     application msword    application vnd openxmlformats-officedocument wordprocessingml document    application vnd mozilla xul xml

User · Answer

As is defined in RFC 1341      In the Extended BNF notation of RFC 822  a Content-Type header field   value is defined as follows       Content-Type    type     subtype       parameter        type              application         audio                  image               message                  multipart      text                  video              x-token       x-token     lt  The two characters  X-  followed  with no               intervening white space  by any token         subtype    token       parameter    attribute     value       attribute    token       value    token   quoted-string       token    1        tspecials                   lt                  Must be in                                           lt       quoted-string                                                  to use within                                               parameter values   And a list of known MIME types that can follow it  or  as Joe remarks  the IANA source    As you can see the list is way too big for you to validate against all of them  What you can do is validate against the general format and the type attribute to make sure that is correct  the set of options is small  and just assume that what follows it is correct  and of course catch any exceptions you might encounter when you put it to actual use    Also note the comment above      If another primary type is to be used for any reason  it must be given a name starting with  X-  to indicate its non-standard status and to avoid any potential conflict with a future official name    You ll notice that a lot of HTTP requests responses include an X- header of some sort which are self defined  keep this in mind when validating the types

[http] What are all the possible values for HTTP "Content-Type" header?

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