bb39460491
- this allows a more transparent and versatile usage of the library as one can simply compile it as-is and then use the builder to configure where we connect and how we connect without having to be concerned about what type is used for the imap::Client / imap::Session
53 lines
1.6 KiB
Rust
53 lines
1.6 KiB
Rust
extern crate imap;
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use std::{env, error::Error};
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fn main() -> Result<(), Box<dyn Error>> {
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// Read config from environment or .env file
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let host = env::var("HOST").expect("missing envvar host");
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let user = env::var("MAILUSER").expect("missing envvar USER");
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let password = env::var("PASSWORD").expect("missing envvar password");
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let port = 993;
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if let Some(email) = fetch_inbox_top(host, user, password, port)? {
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println!("{}", &email);
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}
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Ok(())
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}
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fn fetch_inbox_top(
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host: String,
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user: String,
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password: String,
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port: u16,
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) -> Result<Option<String>, Box<dyn Error>> {
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let client = imap::ClientBuilder::new(&host, port).connect()?;
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// the client we have here is unauthenticated.
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// to do anything useful with the e-mails, we need to log in
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let mut imap_session = client.login(&user, &password).map_err(|e| e.0)?;
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// we want to fetch the first email in the INBOX mailbox
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imap_session.select("INBOX")?;
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// fetch message number 1 in this mailbox, along with its RFC822 field.
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// RFC 822 dictates the format of the body of e-mails
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let messages = imap_session.fetch("1", "RFC822")?;
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let message = if let Some(m) = messages.iter().next() {
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m
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} else {
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return Ok(None);
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};
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// extract the message's body
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let body = message.body().expect("message did not have a body!");
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let body = std::str::from_utf8(body)
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.expect("message was not valid utf-8")
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.to_string();
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// be nice to the server and log out
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imap_session.logout()?;
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Ok(Some(body))
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}
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