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***** Referer: contains a URL, the page of the user from accessing the page URL represents the current request.
***** User-Agent: browser type, if the contents of the return Servlet browser type related to the value is useful;
*****Content-Type
1, common media format type as follows:
1 text / HTML: HTML format 2 text / Plain: plain text 3 text / xml: XML format 4 Image / GIF: GIF picture format 5 Image / jpeg: JPG picture format 6 Image / PNG: PNG image format
2, beginning with application of media format type:
. 1 file application / XHTML + XML: XHTML format 2 file application / XML: the XML data format . 3 file application / Atom + XML: the Atom the XML syndication format . 4 file application / JSON: the JSON data format . 5 file application / PDF: PDF format . 6 file application / MSWord: Word document format 7 file application / OCTET - Uninterpreted stream: binary data stream (such as the common file download) . 8 file application / X-WWW-form-urlencoded: <form encType = ""> the default encType, form form data sent is encoded as a key / value format to the server (the default form submission data format)
3, another common media format is used when uploading documents:
. 1 multipart / form-Data: when a file upload is required in the form, it is necessary to use the format