aerogramme.deuxfleurs.fr/content/documentation/development/netcat.md

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+++
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title = "Debug with socat"
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weight = 10
+++
In this document, we collected some traces from netcat
that could help you quickly test/debug Aerogramme.
Start with:
```
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socat - tcp:localhost:1143,crlf
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```
## Login
```
S: * OK Hello
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C: A1 LOGIN alice hunter2
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S: A1 OK Completed
```
## Select mailbox
```
C: A2 SELECT INBOX
S: * 0 EXISTS
S: * 0 RECENT
S: * FLAGS (\Seen \Answered \Flagged \Deleted \Draft)
S: * OK [PERMANENTFLAGS (\Seen \Answered \Flagged \Deleted \Draft \*)] Flags permitted
S: * OK [UIDVALIDITY 1] UIDs valid
S: * OK [UIDNEXT 1] Predict next UID
S: A2 OK [READ-WRITE] Select completed
```
## Check for new mails
Here we simply use the `NOOP` command to trigger an interaction with the server.
```
C: A4 NOOP
S: * 1 EXISTS
S: A4 OK NOOP completed.
```
## See mail structure
```
C: A5 FETCH 1 FULL
S: * 1 FETCH (UID 1 FLAGS () INTERNALDATE "06-Jul-2022 14:46:42 +0000"
RFC822.SIZE 117 ENVELOPE (NIL "test" (("Alan Smith" NIL "alan" "smith.me"))
NIL NIL (("Alan Smith" NIL "alan" "aerogramme.tld")) NIL NIL NIL NIL)
BODY ("TEXT" "test" NIL "test" "test" "test" 1 1))
```
## See mail content
```
C: A6 FETCH 1 (RFC822)
S: * 1 FETCH (UID 1 RFC822 {117}
S: Subject: test
S: From: Alan Smith <alan@smith.me>
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S: To: Alan Smith <alice@example.tld>
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S:
S: Hello, world!
S: .
S: )
S: A6 OK FETCH completed
```
## Disconnect
```
C: A7 LOGOUT
S: * BYE Logging out
S: A7 OK Logout completed
```
## Full trace
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An (old) IMAP trace extracted from Aerogramme:
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```
S: * OK Hello
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C: A1 LOGIN alice hunter2
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S: A1 OK Completed
C: A2 SELECT INBOX
S: * 0 EXISTS
S: * 0 RECENT
S: * FLAGS (\Seen \Answered \Flagged \Deleted \Draft)
S: * OK [PERMANENTFLAGS (\Seen \Answered \Flagged \Deleted \Draft \*)] Flags permitted
S: * OK [UIDVALIDITY 1] UIDs valid
S: * OK [UIDNEXT 1] Predict next UID
S: A2 OK [READ-WRITE] Select completed
C: A3 NOOP
S: A3 OK NOOP completed.
<---- e-mail arrives through LMTP server ---->
C: A4 NOOP
S: * 1 EXISTS
S: A4 OK NOOP completed.
C: A5 FETCH 1 FULL
S: * 1 FETCH (UID 1 FLAGS () INTERNALDATE "06-Jul-2022 14:46:42 +0000"
RFC822.SIZE 117 ENVELOPE (NIL "test" (("Alan Smith" NIL "alan" "smith.me"))
NIL NIL (("Alan Smith" NIL "alan" "aerogramme.tld")) NIL NIL NIL NIL)
BODY ("TEXT" "test" NIL "test" "test" "test" 1 1))
S: A5 OK FETCH completed
C: A6 FETCH 1 (RFC822)
S: * 1 FETCH (UID 1 RFC822 {117}
S: Subject: test
S: From: Alan Smith <alan@smith.me>
S: To: Alan Smith <alan@aerogramme.tld>
S:
S: Hello, world!
S: .
S: )
S: A6 OK FETCH completed
C: A7 LOGOUT
S: * BYE Logging out
S: A7 OK Logout completed
```