From 4bfd864f10b68b71482b35c818559068ef8d5797 Mon Sep 17 00:00:00 2001 From: Thomas Voss Date: Wed, 27 Nov 2024 20:54:24 +0100 Subject: doc: Add RFC documents --- doc/rfc/rfc2088.txt | 115 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 115 insertions(+) create mode 100644 doc/rfc/rfc2088.txt (limited to 'doc/rfc/rfc2088.txt') diff --git a/doc/rfc/rfc2088.txt b/doc/rfc/rfc2088.txt new file mode 100644 index 0000000..f36cc76 --- /dev/null +++ b/doc/rfc/rfc2088.txt @@ -0,0 +1,115 @@ + + + + + + +Network Working Group J. Myers +Request for Comments: 2088 Carnegie Mellon +Cateogry: Standards Track January 1997 + + + IMAP4 non-synchronizing literals + +Status of this Memo + + This document specifies an Internet standards track protocol for the + Internet community, and requests discussion and suggestions for + improvements. Please refer to the current edition of the "Internet + Official Protocol Standards" (STD 1) for the standardization state + and status of this protocol. Distribution of this memo is unlimited. + +1. Abstract + + The Internet Message Access Protocol [IMAP4] contains the "literal" + syntactic construct for communicating strings. When sending a + literal from client to server, IMAP4 requires the client to wait for + the server to send a command continuation request between sending the + octet count and the string data. This document specifies an + alternate form of literal which does not require this network round + trip. + +2. Conventions Used in this Document + + In examples, "C:" and "S:" indicate lines sent by the client and + server respectively. + +3. Specification + + The non-synchronizing literal is added an alternate form of literal, + and may appear in communication from client to server instead of the + IMAP4 form of literal. The IMAP4 form of literal, used in + communication from client to server, is referred to as a + synchronizing literal. + + Non-synchronizing literals may be used with any IMAP4 server + implementation which returns "LITERAL+" as one of the supported + capabilities to the CAPABILITY command. If the server does not + advertise the LITERAL+ capability, the client must use synchronizing + literals instead. + + The non-synchronizing literal is distinguished from the original + synchronizing literal by having a plus ('+') between the octet count + and the closing brace ('}'). The server does not generate a command + continuation request in response to a non-synchronizing literal, and + + + +Myers Standards Track [Page 1] + +RFC 2088 LITERAL January 1997 + + + clients are not required to wait before sending the octets of a non- + synchronizing literal. + + The protocol receiver of an IMAP4 server must check the end of every + received line for an open brace ('{') followed by an octet count, a + plus ('+'), and a close brace ('}') immediately preceeding the CRLF. + If it finds this sequence, it is the octet count of a non- + synchronizing literal and the server MUST treat the specified number + of following octets and the following line as part of the same + command. A server MAY still process commands and reject errors on a + line-by-line basis, as long as it checks for non-synchronizing + literals at the end of each line. + + Example: C: A001 LOGIN {11+} + C: FRED FOOBAR {7+} + C: fat man + S: A001 OK LOGIN completed + +4. Formal Syntax + + The following syntax specification uses the augmented Backus-Naur + Form (BNF) notation as specified in [RFC-822] as modified by [IMAP4]. + Non-terminals referenced but not defined below are as defined by + [IMAP4]. + + literal ::= "{" number ["+"] "}" CRLF *CHAR8 + ;; Number represents the number of CHAR8 octets + +6. References + + [IMAP4] Crispin, M., "Internet Message Access Protocol - Version 4", + draft-crispin-imap-base-XX.txt, University of Washington, April 1996. + + [RFC-822] Crocker, D., "Standard for the Format of ARPA Internet Text + Messages", STD 11, RFC 822. + +7. Security Considerations + + There are no known security issues with this extension. + +8. Author's Address + + John G. Myers + Carnegie-Mellon University + 5000 Forbes Ave. + Pittsburgh PA, 15213-3890 + + Email: jgm+@cmu.edu + + + +Myers Standards Track [Page 2] + -- cgit v1.2.3