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CHARCODE parameter* == CHARCODE=[inputCode/]outputCode[:[tosv][:connMap]] outputCode == charCode charCode == iso-2022-jp | euc-jp | shift_jis | utf-8 | us-ascii | JIS | EUC | SJIS | UTF8 | ASCII | guess connMap == [ProtoList][:[dstHostList][:[srcHostList]]] -- restriction: applicable to HTTP, FTP, SMTP, POP, NNTP, Telnet, Tcprelay -- default: none
The pseudo code name "guess" means not doing conversion but supplement the "charset" attribute in "Content-Type" header in a message when it is lacking, guessing it from the body of the message. This is useful when a viewer program (ex. a web browser) of the message is not localized to Japanese thus non-ASCII codes like EUC-JP are guessed as European or so by the viewer.
If "tosv" is specified, the conversion is applied to the request message (or a message toward a server). The conversion is also applied to fragments of Japanese text in a HTTP request message encoded in "%XX" in its request URL or in the body of a POST message (when it is encoded in Content-Type: application/x-www-form-urlencoded). The set of values of Content-Type to which the conversion is applied can be specified with HTTPCONF=post-ccx-type.
The application of the conversion can be limited only to a specified set of protocols, servers and clients specified with connMap. In the connMap, the default value of ProtoList, dstHostList and srcHostList is "*" which matches any protocols or hosts.
Example: send response in UTF8 to clients and send request in Shift_JIS to HTTP servers
For the FTP protocol, the conversion is applied only to the data of the ASCII type relayed on the data-connections by default. It is applied also to binary data or data on the control-connection with FTPCONF="ccx:any".
To enable this parameter for internet-mail/news protocols (SMTP, POP and NNTP), also MIMECONV parameter must be specified so that it enables character conversion (enabled by default).
A HTTP client can override this specification by sending its choice in "Accept-Language" field in a request message, which may be configurable in each client (WWW browser). For example, if "Accept-Language: (charcode=EUC)" is sent in a request from client, the response text will be converted into EUC regardless of CHARCODE specification of the DeleGate. If "Accept-Language: (charcode=THRU)" is specified, any conversion specified by the administrator of this DeleGate is disabled.