IMAP命令获取消息大小 [英] IMAP command to get size of message

问题描述

我正在寻找使用IMAP（我为自己编写一个简单的c＃lib）获取邮件大小的最佳方法。基本上，POP3 STAT命令等效将是好的，但它不存在。我想到获取消息头和获取content-length字段。

I am looking for the best way to get the sizes of messages using IMAP(i am writing a simple c# lib for myself). Basically a POP3 STAT command equivalent would be good, but it does not exist. I am thinking of fetching the message header and getting the content-length field. Anyone got a better idea or solution?

推荐答案

也许使用 FETCH NNN HEADER 是这样做的唯一方法。您是否已检查 FETCH NNN RFC822.SIZE 的规范？也许一个好主意是从 fetchmail 日志中学习：

Perhaps using the FETCH NNN HEADER is the only way of doing that. Have you checked the spec for FETCH NNN RFC822.SIZE? Also perhaps a good idea would be to learn from fetchmail logs:

fetchmail: IMAP< * OK GroupWise IMAP4rev1 Server Ready
fetchmail: IMAP> A0001 CAPABILITY
fetchmail: IMAP< * CAPABILITY IMAP4rev1 AUTH=XGWTRUSTEDAPP XGWEXTENSIONS
fetchmail: IMAP< A0001 OK CAPABILITY completed
fetchmail: IMAP> A0002 LOGIN "user1" *
fetchmail: IMAP< A0002 OK LOGIN completed
fetchmail: IMAP> A0003 SELECT "INBOX"
fetchmail: IMAP< * 260 EXISTS
fetchmail: IMAP< * 1 RECENT
fetchmail: IMAP< * OK [UNSEEN 260]
fetchmail: IMAP< * OK [UIDVALIDITY 1301053702]
fetchmail: IMAP< * OK [UIDNEXT 545]
fetchmail: IMAP< * FLAGS (Answered Flagged Deleted Draft Seen)
fetchmail: IMAP< * OK [PERMANENTFLAGS (Answered Flagged Deleted Draft Seen *)]
fetchmail: IMAP< A0003 OK [READ-WRITE] SELECT completed
fetchmail: IMAP> A0004 SEARCH UNSEEN NOT DELETED
fetchmail: IMAP< * SEARCH 260
fetchmail: IMAP< A0004 OK SEARCH completed
260 messages (259 seen) for user1 at host_address.
skipping message user1@host_address:1 not flushed
      { ... etc ... }
skipping message user1@host_address:258 not flushed
skipping message user1@host_address:259 not flushed
fetchmail: IMAP> A0005 FETCH 260 RFC822.SIZE
fetchmail: IMAP< * 260 FETCH (RFC822.SIZE 23853)
fetchmail: IMAP< A0005 OK FETCH completed
fetchmail: IMAP> A0006 FETCH 260 RFC822.HEADER
fetchmail: IMAP< * 260 FETCH (RFC822.HEADER {367}
fetchmail: IMAP< )
fetchmail: IMAP< A0006 OK FETCH completed
fetchmail: IMAP> A0007 FETCH 260 BODY.PEEK[TEXT]
fetchmail: IMAP< * 260 FETCH (BODY[TEXT] {23486}
(23486 body octets) *********************
fetchmail: IMAP< A0007 OK FETCH completed
fetchmail: IMAP> A0008 STORE 260 +FLAGS (Seen)
fetchmail: IMAP< * 260 FETCH (FLAGS (Seen Recent))
fetchmail: IMAP< A0008 OK STORE completed
fetchmail: IMAP> A0009 LOGOUT
fetchmail: IMAP< * BYE IMAP4rev1 Server Disconnect
fetchmail: IMAP< A0009 OK LOGOUT completed

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