![]() If this line is present it contains authorization information. If a partial URI is given, then it should be parsed relative to the URI of It allows bad links to be traced for maintenance. This allows a server to generate lists of back-links to documents, for This optional header field allows the client to specify, for the server'sĭocument (or element within the document) from which the URI in the request Other products which form part of the user agent may be put as separateĮxample: User-Agent: LII-Cello/1.0 libwww/2.5 The first white space delimited word mustīe the software product name, with an optional slash and version designator. This is for statistical purposes and the tracing of protocol This line if present gives the software program used by the originalĬlient. A response in an unspecifies language is not illegal. Similar to Accept, but lists the Language values which are preferable in = Accept-Encoding: *Įxample Accept-Encoding: x-compress x-zip Similar to Accept, but lists the Content-Encoding types Please feed back any references toĮxisting improved abreviations for these: dpi dots per inch: pixels per inch pxmax maximum width in pixels (image or video) pymax maximum height in pixels bits bits per sample (sound) or pixels (graphics) mchrome greyscale or black and white (no value) sps samples (sound) or frames (video) per second length total size of object in bytes These parameters are to be specified when types are registered. Image to be selected rathther than giving the client a color image to convert ![]() This may allow the server toĮconomise greatly on transmission time by reducing the resultion of an image,įor example, and enable a more appropriate custom-designed black and white They will allow a client to specify in theĪccept: field the resolution of its device. Parameters on the content type are extremely useful for describing Some other audio, or failing that, just give me what you've got." Type parameters May be interpreted as "if you have basic audio, send it otherwise send me To the Accept: filed, and not to the content-type field of course. The second half of the content-type value, or both halves. ![]() Which they may not be aware, an asterisk "*" may be used in place of either In order to save time, and also allow clients to receive content types of Example Accept: text/plain, text/htmlĪccept: text/x-dvi q=.8 mxb=100000 mxt=5.0, text/x-c If no Accept: field is present, then it is assumed that text/plain and Has a higher precedence than a comma in this syntax, to conform to MIME Negotiation algorithm as a function and penalty model. The format ofĮach entry in the list is (/ meaning "or") = Accept: * This field may be wrapped onto several lines according to RCFC822, andĪlso more than one occurence of the field is allowed with the signifianceīeing the same as if all the entries has been in one field. The set given may of course vary from request to request from the same Which will be accepted in the response to this request. This field contains a semicolon-separated list of representation schemes ( Content-Type metainformation values) Representation of an address on some other mail system. Not it is in fact an internet mail address or the internet mail The mail address should, if possible, be a valid mail address, whether or Passed through a gateway, then the original issuer's address should be The Internet mail address in this field does not have to correspond to the Performed on behalf of the person given, who accepts responsability for the The interpretation of this field is that the request is being Thisįield may be used for logging purposes and an insecure form of access In Internet mail format, this gives the name of the requesting user. The list of headers is terminated by an empty line. These header lines are sent by the client in a HTTP protocol transaction.
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