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-rw-r--r--aerogramme/Cargo.toml15
-rw-r--r--aerogramme/src/k2v_util.rs26
-rw-r--r--aerogramme/src/lib.rs19
-rw-r--r--aerogramme/src/main.rs10
-rw-r--r--aerogramme/src/server.rs14
-rw-r--r--aerogramme/tests/behavior.rs357
-rw-r--r--aerogramme/tests/common/constants.rs54
-rw-r--r--aerogramme/tests/common/fragments.rs570
-rw-r--r--aerogramme/tests/common/mod.rs99
9 files changed, 1108 insertions, 56 deletions
diff --git a/aerogramme/Cargo.toml b/aerogramme/Cargo.toml
index e408aec..ab62e44 100644
--- a/aerogramme/Cargo.toml
+++ b/aerogramme/Cargo.toml
@@ -6,6 +6,21 @@ edition = "2021"
license = "EUPL-1.2"
description = "A robust email server"
+[dependencies]
+aero-user.workspace = true
+aero-proto.workspace = true
+
+anyhow.workspace = true
+backtrace.workspace = true
+futures.workspace = true
+tokio.workspace = true
+log.workspace = true
+nix.workspace = true
+clap.workspace = true
+tracing.workspace = true
+tracing-subscriber.workspace = true
+rpassword.workspace = true
+
[[test]]
name = "behavior"
path = "tests/behavior.rs"
diff --git a/aerogramme/src/k2v_util.rs b/aerogramme/src/k2v_util.rs
deleted file mode 100644
index 3cd969b..0000000
--- a/aerogramme/src/k2v_util.rs
+++ /dev/null
@@ -1,26 +0,0 @@
-/*
-use anyhow::Result;
-// ---- UTIL: function to wait for a value to have changed in K2V ----
-
-pub async fn k2v_wait_value_changed(
- k2v: &storage::RowStore,
- key: &storage::RowRef,
-) -> Result<CausalValue> {
- loop {
- if let Some(ct) = prev_ct {
- match k2v.poll_item(pk, sk, ct.clone(), None).await? {
- None => continue,
- Some(cv) => return Ok(cv),
- }
- } else {
- match k2v.read_item(pk, sk).await {
- Err(k2v_client::Error::NotFound) => {
- k2v.insert_item(pk, sk, vec![0u8], None).await?;
- }
- Err(e) => return Err(e.into()),
- Ok(cv) => return Ok(cv),
- }
- }
- }
-}
-*/
diff --git a/aerogramme/src/lib.rs b/aerogramme/src/lib.rs
deleted file mode 100644
index f065478..0000000
--- a/aerogramme/src/lib.rs
+++ /dev/null
@@ -1,19 +0,0 @@
-#![feature(type_alias_impl_trait)]
-#![feature(async_fn_in_trait)]
-#![feature(async_closure)]
-#![feature(trait_alias)]
-
-pub mod auth;
-pub mod bayou;
-pub mod config;
-pub mod cryptoblob;
-pub mod dav;
-pub mod imap;
-pub mod k2v_util;
-pub mod lmtp;
-pub mod login;
-pub mod mail;
-pub mod server;
-pub mod storage;
-pub mod timestamp;
-pub mod user;
diff --git a/aerogramme/src/main.rs b/aerogramme/src/main.rs
index 43b4dca..4251520 100644
--- a/aerogramme/src/main.rs
+++ b/aerogramme/src/main.rs
@@ -1,3 +1,5 @@
+mod server;
+
use std::io::Read;
use std::path::PathBuf;
@@ -5,9 +7,9 @@ use anyhow::{bail, Context, Result};
use clap::{Parser, Subcommand};
use nix::{sys::signal, unistd::Pid};
-use aerogramme::config::*;
-use aerogramme::login::{static_provider::*, *};
-use aerogramme::server::Server;
+use aero_user::config::*;
+use aero_user::login::{static_provider::*, *};
+use crate::server::Server;
#[derive(Parser, Debug)]
#[clap(author, version, about, long_about = None)]
@@ -151,7 +153,7 @@ fn tracer() {
#[tokio::main]
async fn main() -> Result<()> {
if std::env::var("RUST_LOG").is_err() {
- std::env::set_var("RUST_LOG", "main=info,aerogramme=info,k2v_client=info")
+ std::env::set_var("RUST_LOG", "info")
}
// Abort on panic (same behavior as in Go)
diff --git a/aerogramme/src/server.rs b/aerogramme/src/server.rs
index 09e91ad..e302db3 100644
--- a/aerogramme/src/server.rs
+++ b/aerogramme/src/server.rs
@@ -7,13 +7,13 @@ use futures::try_join;
use log::*;
use tokio::sync::watch;
-use crate::auth;
-use crate::config::*;
-use crate::dav;
-use crate::imap;
-use crate::lmtp::*;
-use crate::login::ArcLoginProvider;
-use crate::login::{demo_provider::*, ldap_provider::*, static_provider::*};
+use aero_user::config::*;
+use aero_user::login::ArcLoginProvider;
+use aero_user::login::{demo_provider::*, ldap_provider::*, static_provider::*};
+use aero_proto::sasl as auth;
+use aero_proto::dav;
+use aero_proto::imap;
+use aero_proto::lmtp::*;
pub struct Server {
lmtp_server: Option<Arc<LmtpServer>>,
diff --git a/aerogramme/tests/behavior.rs b/aerogramme/tests/behavior.rs
new file mode 100644
index 0000000..13baf0e
--- /dev/null
+++ b/aerogramme/tests/behavior.rs
@@ -0,0 +1,357 @@
+use anyhow::Context;
+
+mod common;
+use crate::common::constants::*;
+use crate::common::fragments::*;
+
+fn main() {
+ rfc3501_imap4rev1_base();
+ rfc6851_imapext_move();
+ rfc4551_imapext_condstore();
+ rfc2177_imapext_idle();
+ rfc5161_imapext_enable(); // 1
+ rfc3691_imapext_unselect(); // 2
+ rfc7888_imapext_literal(); // 3
+ rfc4315_imapext_uidplus(); // 4
+ rfc5819_imapext_liststatus(); // 5
+ println!("✅ SUCCESS 🌟🚀🥳🙏🥹");
+}
+
+fn rfc3501_imap4rev1_base() {
+ println!("🧪 rfc3501_imap4rev1_base");
+ common::aerogramme_provider_daemon_dev(|imap_socket, lmtp_socket| {
+ connect(imap_socket).context("server says hello")?;
+ capability(imap_socket, Extension::None).context("check server capabilities")?;
+ login(imap_socket, Account::Alice).context("login test")?;
+ create_mailbox(imap_socket, Mailbox::Archive).context("created mailbox archive")?;
+ let select_res =
+ select(imap_socket, Mailbox::Inbox, SelectMod::None).context("select inbox")?;
+ assert!(select_res.contains("* 0 EXISTS"));
+
+ check(imap_socket).context("check must run")?;
+ status(imap_socket, Mailbox::Archive, StatusKind::UidNext)
+ .context("status of archive from inbox")?;
+ lmtp_handshake(lmtp_socket).context("handshake lmtp done")?;
+ lmtp_deliver_email(lmtp_socket, Email::Multipart).context("mail delivered successfully")?;
+ noop_exists(imap_socket, 1).context("noop loop must detect a new email")?;
+
+ let srv_msg = fetch(
+ imap_socket,
+ Selection::FirstId,
+ FetchKind::Rfc822,
+ FetchMod::None,
+ )
+ .context("fetch rfc822 message, should be our first message")?;
+ let orig_email = std::str::from_utf8(EMAIL1)?;
+ assert!(srv_msg.contains(orig_email));
+
+ copy(imap_socket, Selection::FirstId, Mailbox::Archive)
+ .context("copy message to the archive mailbox")?;
+ append(imap_socket, Email::Basic).context("insert email in INBOX")?;
+ noop_exists(imap_socket, 2).context("noop loop must detect a new email")?;
+ search(imap_socket, SearchKind::Text("OoOoO")).expect("search should return something");
+ store(
+ imap_socket,
+ Selection::FirstId,
+ Flag::Deleted,
+ StoreAction::AddFlags,
+ StoreMod::None,
+ )
+ .context("should add delete flag to the email")?;
+ expunge(imap_socket).context("expunge emails")?;
+ rename_mailbox(imap_socket, Mailbox::Archive, Mailbox::Drafts)
+ .context("Archive mailbox is renamed Drafts")?;
+ delete_mailbox(imap_socket, Mailbox::Drafts).context("Drafts mailbox is deleted")?;
+ Ok(())
+ })
+ .expect("test fully run");
+}
+
+fn rfc3691_imapext_unselect() {
+ println!("🧪 rfc3691_imapext_unselect");
+ common::aerogramme_provider_daemon_dev(|imap_socket, lmtp_socket| {
+ connect(imap_socket).context("server says hello")?;
+
+ lmtp_handshake(lmtp_socket).context("handshake lmtp done")?;
+ lmtp_deliver_email(lmtp_socket, Email::Basic).context("mail delivered successfully")?;
+
+ capability(imap_socket, Extension::Unselect).context("check server capabilities")?;
+ login(imap_socket, Account::Alice).context("login test")?;
+ let select_res =
+ select(imap_socket, Mailbox::Inbox, SelectMod::None).context("select inbox")?;
+ assert!(select_res.contains("* 0 EXISTS"));
+
+ noop_exists(imap_socket, 1).context("noop loop must detect a new email")?;
+ store(
+ imap_socket,
+ Selection::FirstId,
+ Flag::Deleted,
+ StoreAction::AddFlags,
+ StoreMod::None,
+ )
+ .context("add delete flags to the email")?;
+ unselect(imap_socket)
+ .context("unselect inbox while preserving email with the \\Delete flag")?;
+ let select_res =
+ select(imap_socket, Mailbox::Inbox, SelectMod::None).context("select inbox again")?;
+ assert!(select_res.contains("* 1 EXISTS"));
+
+ let srv_msg = fetch(
+ imap_socket,
+ Selection::FirstId,
+ FetchKind::Rfc822,
+ FetchMod::None,
+ )
+ .context("message is still present")?;
+ let orig_email = std::str::from_utf8(EMAIL2)?;
+ assert!(srv_msg.contains(orig_email));
+
+ close(imap_socket).context("close inbox and expunge message")?;
+ let select_res = select(imap_socket, Mailbox::Inbox, SelectMod::None)
+ .context("select inbox again and check it's empty")?;
+ assert!(select_res.contains("* 0 EXISTS"));
+
+ Ok(())
+ })
+ .expect("test fully run");
+}
+
+fn rfc5161_imapext_enable() {
+ println!("🧪 rfc5161_imapext_enable");
+ common::aerogramme_provider_daemon_dev(|imap_socket, _lmtp_socket| {
+ connect(imap_socket).context("server says hello")?;
+ login(imap_socket, Account::Alice).context("login test")?;
+ enable(imap_socket, Enable::Utf8Accept, Some(Enable::Utf8Accept))?;
+ enable(imap_socket, Enable::Utf8Accept, None)?;
+ logout(imap_socket)?;
+
+ Ok(())
+ })
+ .expect("test fully run");
+}
+
+fn rfc6851_imapext_move() {
+ println!("🧪 rfc6851_imapext_move");
+ common::aerogramme_provider_daemon_dev(|imap_socket, lmtp_socket| {
+ connect(imap_socket).context("server says hello")?;
+
+ capability(imap_socket, Extension::Move).context("check server capabilities")?;
+ login(imap_socket, Account::Alice).context("login test")?;
+ create_mailbox(imap_socket, Mailbox::Archive).context("created mailbox archive")?;
+ let select_res =
+ select(imap_socket, Mailbox::Inbox, SelectMod::None).context("select inbox")?;
+ assert!(select_res.contains("* 0 EXISTS"));
+
+ lmtp_handshake(lmtp_socket).context("handshake lmtp done")?;
+ lmtp_deliver_email(lmtp_socket, Email::Basic).context("mail delivered successfully")?;
+
+ noop_exists(imap_socket, 1).context("noop loop must detect a new email")?;
+ r#move(imap_socket, Selection::FirstId, Mailbox::Archive)
+ .context("message from inbox moved to archive")?;
+
+ unselect(imap_socket)
+ .context("unselect inbox while preserving email with the \\Delete flag")?;
+ let select_res =
+ select(imap_socket, Mailbox::Archive, SelectMod::None).context("select archive")?;
+ assert!(select_res.contains("* 1 EXISTS"));
+
+ let srv_msg = fetch(
+ imap_socket,
+ Selection::FirstId,
+ FetchKind::Rfc822,
+ FetchMod::None,
+ )
+ .context("check mail exists")?;
+ let orig_email = std::str::from_utf8(EMAIL2)?;
+ assert!(srv_msg.contains(orig_email));
+
+ logout(imap_socket).context("must quit")?;
+
+ Ok(())
+ })
+ .expect("test fully run");
+}
+
+fn rfc7888_imapext_literal() {
+ println!("🧪 rfc7888_imapext_literal");
+ common::aerogramme_provider_daemon_dev(|imap_socket, _lmtp_socket| {
+ connect(imap_socket).context("server says hello")?;
+
+ capability(imap_socket, Extension::LiteralPlus).context("check server capabilities")?;
+ login_with_literal(imap_socket, Account::Alice).context("use literal to connect Alice")?;
+
+ Ok(())
+ })
+ .expect("test fully run");
+}
+
+fn rfc4551_imapext_condstore() {
+ println!("🧪 rfc4551_imapext_condstore");
+ common::aerogramme_provider_daemon_dev(|imap_socket, lmtp_socket| {
+ // Setup the test
+ connect(imap_socket).context("server says hello")?;
+
+ // RFC 3.1.1 Advertising Support for CONDSTORE
+ capability(imap_socket, Extension::Condstore).context("check server capabilities")?;
+ login(imap_socket, Account::Alice).context("login test")?;
+
+ // RFC 3.1.8. CONDSTORE Parameter to SELECT and EXAMINE
+ let select_res =
+ select(imap_socket, Mailbox::Inbox, SelectMod::Condstore).context("select inbox")?;
+ // RFC 3.1.2 New OK Untagged Responses for SELECT and EXAMINE
+ assert!(select_res.contains("[HIGHESTMODSEQ 1]"));
+
+ // RFC 3.1.3. STORE and UID STORE Commands
+ lmtp_handshake(lmtp_socket).context("handshake lmtp done")?;
+ lmtp_deliver_email(lmtp_socket, Email::Basic).context("mail delivered successfully")?;
+ lmtp_deliver_email(lmtp_socket, Email::Multipart).context("mail delivered successfully")?;
+ noop_exists(imap_socket, 2).context("noop loop must detect a new email")?;
+ let store_res = store(
+ imap_socket,
+ Selection::All,
+ Flag::Important,
+ StoreAction::AddFlags,
+ StoreMod::UnchangedSince(1),
+ )?;
+ assert!(store_res.contains("[MODIFIED 2]"));
+ assert!(store_res.contains("* 1 FETCH (FLAGS (\\Important) MODSEQ (3))"));
+ assert!(!store_res.contains("* 2 FETCH"));
+ assert_eq!(store_res.lines().count(), 2);
+
+ // RFC 3.1.4. FETCH and UID FETCH Commands
+ let fetch_res = fetch(
+ imap_socket,
+ Selection::All,
+ FetchKind::Rfc822Size,
+ FetchMod::ChangedSince(2),
+ )?;
+ assert!(fetch_res.contains("* 1 FETCH (RFC822.SIZE 81 MODSEQ (3))"));
+ assert!(!fetch_res.contains("* 2 FETCH"));
+ assert_eq!(store_res.lines().count(), 2);
+
+ // RFC 3.1.5. MODSEQ Search Criterion in SEARCH
+ let search_res = search(imap_socket, SearchKind::ModSeq(3))?;
+ // RFC 3.1.6. Modified SEARCH Untagged Response
+ assert!(search_res.contains("* SEARCH 1 (MODSEQ 3)"));
+
+ // RFC 3.1.7 HIGHESTMODSEQ Status Data Items
+ let status_res = status(imap_socket, Mailbox::Inbox, StatusKind::HighestModSeq)?;
+ assert!(status_res.contains("HIGHESTMODSEQ 3"));
+
+ Ok(())
+ })
+ .expect("test fully run");
+}
+
+fn rfc2177_imapext_idle() {
+ println!("🧪 rfc2177_imapext_idle");
+ common::aerogramme_provider_daemon_dev(|imap_socket, lmtp_socket| {
+ // Test setup, check capability
+ connect(imap_socket).context("server says hello")?;
+ capability(imap_socket, Extension::Idle).context("check server capabilities")?;
+ login(imap_socket, Account::Alice).context("login test")?;
+ select(imap_socket, Mailbox::Inbox, SelectMod::None).context("select inbox")?;
+
+ // Check that new messages from LMTP are correctly detected during idling
+ start_idle(imap_socket).context("can't start idling")?;
+ lmtp_handshake(lmtp_socket).context("handshake lmtp done")?;
+ lmtp_deliver_email(lmtp_socket, Email::Basic).context("mail delivered successfully")?;
+ let srv_msg = stop_idle(imap_socket).context("stop idling")?;
+ assert!(srv_msg.contains("* 1 EXISTS"));
+
+ Ok(())
+ })
+ .expect("test fully run");
+}
+
+fn rfc4315_imapext_uidplus() {
+ println!("🧪 rfc4315_imapext_uidplus");
+ common::aerogramme_provider_daemon_dev(|imap_socket, lmtp_socket| {
+ // Test setup, check capability, insert 2 emails
+ connect(imap_socket).context("server says hello")?;
+ capability(imap_socket, Extension::UidPlus).context("check server capabilities")?;
+ login(imap_socket, Account::Alice).context("login test")?;
+ select(imap_socket, Mailbox::Inbox, SelectMod::None).context("select inbox")?;
+ lmtp_handshake(lmtp_socket).context("handshake lmtp done")?;
+ lmtp_deliver_email(lmtp_socket, Email::Basic).context("mail delivered successfully")?;
+ lmtp_deliver_email(lmtp_socket, Email::Multipart).context("mail delivered successfully")?;
+ noop_exists(imap_socket, 2).context("noop loop must detect a new email")?;
+
+ // Check UID EXPUNGE seqset
+ store(
+ imap_socket,
+ Selection::All,
+ Flag::Deleted,
+ StoreAction::AddFlags,
+ StoreMod::None,
+ )?;
+ let res = uid_expunge(imap_socket, Selection::FirstId)?;
+ assert_eq!(res.lines().count(), 2);
+ assert!(res.contains("* 1 EXPUNGE"));
+
+ // APPENDUID check UID + UID VALIDITY
+ // Note: 4 and not 3, as we update the UID counter when we delete an email
+ // it's part of our UID proof
+ let res = append(imap_socket, Email::Multipart)?;
+ assert!(res.contains("[APPENDUID 1 4]"));
+
+ // COPYUID, check
+ create_mailbox(imap_socket, Mailbox::Archive).context("created mailbox archive")?;
+ let res = copy(imap_socket, Selection::FirstId, Mailbox::Archive)?;
+ assert!(res.contains("[COPYUID 1 2 1]"));
+
+ // MOVEUID, check
+ let res = r#move(imap_socket, Selection::FirstId, Mailbox::Archive)?;
+ assert!(res.contains("[COPYUID 1 2 2]"));
+
+ Ok(())
+ })
+ .expect("test fully run");
+}
+
+///
+/// Example
+///
+/// ```text
+/// 30 list "" "*" RETURN (STATUS (MESSAGES UNSEEN))
+/// * LIST (\Subscribed) "." INBOX
+/// * STATUS INBOX (MESSAGES 2 UNSEEN 1)
+/// 30 OK LIST completed
+/// ```
+fn rfc5819_imapext_liststatus() {
+ println!("🧪 rfc5819_imapext_liststatus");
+ common::aerogramme_provider_daemon_dev(|imap_socket, lmtp_socket| {
+ // Test setup, check capability, add 2 emails, read 1
+ connect(imap_socket).context("server says hello")?;
+ capability(imap_socket, Extension::ListStatus).context("check server capabilities")?;
+ login(imap_socket, Account::Alice).context("login test")?;
+ select(imap_socket, Mailbox::Inbox, SelectMod::None).context("select inbox")?;
+ lmtp_handshake(lmtp_socket).context("handshake lmtp done")?;
+ lmtp_deliver_email(lmtp_socket, Email::Basic).context("mail delivered successfully")?;
+ lmtp_deliver_email(lmtp_socket, Email::Multipart).context("mail delivered successfully")?;
+ noop_exists(imap_socket, 2).context("noop loop must detect a new email")?;
+ fetch(
+ imap_socket,
+ Selection::FirstId,
+ FetchKind::Rfc822,
+ FetchMod::None,
+ )
+ .context("read one message")?;
+ close(imap_socket).context("close inbox")?;
+
+ // Test return status MESSAGES UNSEEN
+ let ret = list(
+ imap_socket,
+ MbxSelect::All,
+ ListReturn::StatusMessagesUnseen,
+ )?;
+ assert!(ret.contains("* STATUS INBOX (MESSAGES 2 UNSEEN 1)"));
+
+ // Test that without RETURN, no status is sent
+ let ret = list(imap_socket, MbxSelect::All, ListReturn::None)?;
+ assert!(!ret.contains("* STATUS"));
+
+ Ok(())
+ })
+ .expect("test fully run");
+}
diff --git a/aerogramme/tests/common/constants.rs b/aerogramme/tests/common/constants.rs
new file mode 100644
index 0000000..c11a04d
--- /dev/null
+++ b/aerogramme/tests/common/constants.rs
@@ -0,0 +1,54 @@
+use std::time;
+
+pub static SMALL_DELAY: time::Duration = time::Duration::from_millis(200);
+
+pub static EMAIL1: &[u8] = b"Date: Sat, 8 Jul 2023 07:14:29 +0200\r
+From: Bob Robert <bob@example.tld>\r
+To: Alice Malice <alice@example.tld>\r
+CC: =?ISO-8859-1?Q?Andr=E9?= Pirard <PIRARD@vm1.ulg.ac.be>\r
+Subject: =?ISO-8859-1?B?SWYgeW91IGNhbiByZWFkIHRoaXMgeW8=?=\r
+ =?ISO-8859-2?B?dSB1bmRlcnN0YW5kIHRoZSBleGFtcGxlLg==?=\r
+X-Unknown: something something\r
+Bad entry\r
+ on multiple lines\r
+Message-ID: <NTAxNzA2AC47634Y366BAMTY4ODc5MzQyODY0ODY5@www.grrrndzero.org>\r
+MIME-Version: 1.0\r
+Content-Type: multipart/alternative;\r
+ boundary=\"b1_e376dc71bafc953c0b0fdeb9983a9956\"\r
+Content-Transfer-Encoding: 7bit\r
+\r
+This is a multi-part message in MIME format.\r
+\r
+--b1_e376dc71bafc953c0b0fdeb9983a9956\r
+Content-Type: text/plain; charset=utf-8\r
+Content-Transfer-Encoding: quoted-printable\r
+\r
+GZ\r
+OoOoO\r
+oOoOoOoOo\r
+oOoOoOoOoOoOoOoOo\r
+oOoOoOoOoOoOoOoOoOoOoOo\r
+oOoOoOoOoOoOoOoOoOoOoOoOoOoOo\r
+OoOoOoOoOoOoOoOoOoOoOoOoOoOoOoOoO\r
+\r
+--b1_e376dc71bafc953c0b0fdeb9983a9956\r
+Content-Type: text/html; charset=us-ascii\r
+\r
+<div style=\"text-align: center;\"><strong>GZ</strong><br />\r
+OoOoO<br />\r
+oOoOoOoOo<br />\r
+oOoOoOoOoOoOoOoOo<br />\r
+oOoOoOoOoOoOoOoOoOoOoOo<br />\r
+oOoOoOoOoOoOoOoOoOoOoOoOoOoOo<br />\r
+OoOoOoOoOoOoOoOoOoOoOoOoOoOoOoOoO<br />\r
+</div>\r
+\r
+--b1_e376dc71bafc953c0b0fdeb9983a9956--\r
+";
+
+pub static EMAIL2: &[u8] = b"From: alice@example.com\r
+To: alice@example.tld\r
+Subject: Test\r
+\r
+Hello world!\r
+";
diff --git a/aerogramme/tests/common/fragments.rs b/aerogramme/tests/common/fragments.rs
new file mode 100644
index 0000000..606af2b
--- /dev/null
+++ b/aerogramme/tests/common/fragments.rs
@@ -0,0 +1,570 @@
+use anyhow::{bail, Result};
+use std::io::Write;
+use std::net::TcpStream;
+use std::thread;
+
+use crate::common::constants::*;
+use crate::common::*;
+
+/// These fragments are not a generic IMAP client
+/// but specialized to our specific tests. They can't take
+/// arbitrary values, only enum for which the code is known
+/// to be correct. The idea is that the generated message is more
+/// or less hardcoded by the developer, so its clear what's expected,
+/// and not generated by a library. Also don't use vector of enum,
+/// as it again introduce some kind of genericity we try so hard to avoid:
+/// instead add a dedicated enum, for example "All" or anything relaevent that would
+/// describe your list and then hardcode it in your fragment.
+/// DON'T. TRY. TO. BE. GENERIC. HERE.
+
+pub fn connect(imap: &mut TcpStream) -> Result<()> {
+ let mut buffer: [u8; 1500] = [0; 1500];
+
+ let read = read_lines(imap, &mut buffer, None)?;
+ assert_eq!(&read[..4], &b"* OK"[..]);
+
+ Ok(())
+}
+
+pub enum Account {
+ Alice,
+}
+
+pub enum Extension {
+ None,
+ Unselect,
+ Move,
+ Condstore,
+ LiteralPlus,
+ Idle,
+ UidPlus,
+ ListStatus,
+}
+
+pub enum Enable {
+ Utf8Accept,
+ CondStore,
+ All,
+}
+
+pub enum Mailbox {
+ Inbox,
+ Archive,
+ Drafts,
+}
+
+pub enum Flag {
+ Deleted,
+ Important,
+}
+
+pub enum Email {
+ Basic,
+ Multipart,
+}
+
+pub enum Selection {
+ FirstId,
+ SecondId,
+ All,
+}
+
+pub enum SelectMod {
+ None,
+ Condstore,
+}
+
+pub enum StoreAction {
+ AddFlags,
+ DelFlags,
+ SetFlags,
+ AddFlagsSilent,
+ DelFlagsSilent,
+ SetFlagsSilent,
+}
+
+pub enum StoreMod {
+ None,
+ UnchangedSince(u64),
+}
+
+pub enum FetchKind {
+ Rfc822,
+ Rfc822Size,
+}
+
+pub enum FetchMod {
+ None,
+ ChangedSince(u64),
+}
+
+pub enum SearchKind<'a> {
+ Text(&'a str),
+ ModSeq(u64),
+}
+
+pub enum StatusKind {
+ UidNext,
+ HighestModSeq,
+}
+
+pub enum MbxSelect {
+ All,
+}
+
+pub enum ListReturn {
+ None,
+ StatusMessagesUnseen,
+}
+
+pub fn capability(imap: &mut TcpStream, ext: Extension) -> Result<()> {
+ imap.write(&b"5 capability\r\n"[..])?;
+
+ let maybe_ext = match ext {
+ Extension::None => None,
+ Extension::Unselect => Some("UNSELECT"),
+ Extension::Move => Some("MOVE"),
+ Extension::Condstore => Some("CONDSTORE"),
+ Extension::LiteralPlus => Some("LITERAL+"),
+ Extension::Idle => Some("IDLE"),
+ Extension::UidPlus => Some("UIDPLUS"),
+ Extension::ListStatus => Some("LIST-STATUS"),
+ };
+
+ let mut buffer: [u8; 6000] = [0; 6000];
+ let read = read_lines(imap, &mut buffer, Some(&b"5 OK"[..]))?;
+ let srv_msg = std::str::from_utf8(read)?;
+ assert!(srv_msg.contains("IMAP4REV1"));
+ if let Some(ext) = maybe_ext {
+ assert!(srv_msg.contains(ext));
+ }
+
+ Ok(())
+}
+
+pub fn login(imap: &mut TcpStream, account: Account) -> Result<()> {
+ let mut buffer: [u8; 1500] = [0; 1500];
+
+ assert!(matches!(account, Account::Alice));
+ imap.write(&b"10 login alice hunter2\r\n"[..])?;
+
+ let read = read_lines(imap, &mut buffer, None)?;
+ assert_eq!(&read[..5], &b"10 OK"[..]);
+
+ Ok(())
+}
+
+pub fn login_with_literal(imap: &mut TcpStream, account: Account) -> Result<()> {
+ let mut buffer: [u8; 1500] = [0; 1500];
+
+ assert!(matches!(account, Account::Alice));
+ imap.write(&b"10 login {5+}\r\nalice {7+}\r\nhunter2\r\n"[..])?;
+ let _read = read_lines(imap, &mut buffer, Some(&b"10 OK"[..]))?;
+ Ok(())
+}
+
+pub fn create_mailbox(imap: &mut TcpStream, mbx: Mailbox) -> Result<()> {
+ let mut buffer: [u8; 1500] = [0; 1500];
+
+ let mbx_str = match mbx {
+ Mailbox::Inbox => "INBOX",
+ Mailbox::Archive => "ArchiveCustom",
+ Mailbox::Drafts => "DraftsCustom",
+ };
+
+ let cmd = format!("15 create {}\r\n", mbx_str);
+ imap.write(cmd.as_bytes())?;
+ let read = read_lines(imap, &mut buffer, None)?;
+ assert_eq!(&read[..12], &b"15 OK CREATE"[..]);
+
+ Ok(())
+}
+
+pub fn list(imap: &mut TcpStream, select: MbxSelect, mod_return: ListReturn) -> Result<String> {
+ let mut buffer: [u8; 6000] = [0; 6000];
+
+ let select_str = match select {
+ MbxSelect::All => "%",
+ };
+
+ let mod_return_str = match mod_return {
+ ListReturn::None => "",
+ ListReturn::StatusMessagesUnseen => " RETURN (STATUS (MESSAGES UNSEEN))",
+ };
+
+ imap.write(format!("19 LIST \"\" \"{}\"{}\r\n", select_str, mod_return_str).as_bytes())?;
+
+ let read = read_lines(imap, &mut buffer, Some(&b"19 OK"[..]))?;
+ let srv_msg = std::str::from_utf8(read)?;
+ Ok(srv_msg.to_string())
+}
+
+pub fn select(imap: &mut TcpStream, mbx: Mailbox, modifier: SelectMod) -> Result<String> {
+ let mut buffer: [u8; 6000] = [0; 6000];
+
+ let mbx_str = match mbx {
+ Mailbox::Inbox => "INBOX",
+ Mailbox::Archive => "ArchiveCustom",
+ Mailbox::Drafts => "DraftsCustom",
+ };
+
+ let mod_str = match modifier {
+ SelectMod::Condstore => " (CONDSTORE)",
+ SelectMod::None => "",
+ };
+
+ imap.write(format!("20 select {}{}\r\n", mbx_str, mod_str).as_bytes())?;
+
+ let read = read_lines(imap, &mut buffer, Some(&b"20 OK"[..]))?;
+ let srv_msg = std::str::from_utf8(read)?;
+
+ Ok(srv_msg.to_string())
+}
+
+pub fn unselect(imap: &mut TcpStream) -> Result<()> {
+ imap.write(&b"70 unselect\r\n"[..])?;
+ let mut buffer: [u8; 1500] = [0; 1500];
+ let _read = read_lines(imap, &mut buffer, Some(&b"70 OK"[..]))?;
+
+ Ok(())
+}
+
+pub fn check(imap: &mut TcpStream) -> Result<()> {
+ let mut buffer: [u8; 1500] = [0; 1500];
+
+ imap.write(&b"21 check\r\n"[..])?;
+ let _read = read_lines(imap, &mut buffer, Some(&b"21 OK"[..]))?;
+
+ Ok(())
+}
+
+pub fn status(imap: &mut TcpStream, mbx: Mailbox, sk: StatusKind) -> Result<String> {
+ let mbx_str = match mbx {
+ Mailbox::Inbox => "INBOX",
+ Mailbox::Archive => "ArchiveCustom",
+ Mailbox::Drafts => "DraftsCustom",
+ };
+ let sk_str = match sk {
+ StatusKind::UidNext => "(UIDNEXT)",
+ StatusKind::HighestModSeq => "(HIGHESTMODSEQ)",
+ };
+ imap.write(format!("25 STATUS {} {}\r\n", mbx_str, sk_str).as_bytes())?;
+ let mut buffer: [u8; 6000] = [0; 6000];
+ let read = read_lines(imap, &mut buffer, Some(&b"25 OK"[..]))?;
+ let srv_msg = std::str::from_utf8(read)?;
+
+ Ok(srv_msg.to_string())
+}
+
+pub fn lmtp_handshake(lmtp: &mut TcpStream) -> Result<()> {
+ let mut buffer: [u8; 1500] = [0; 1500];
+
+ let _read = read_lines(lmtp, &mut buffer, None)?;
+ assert_eq!(&buffer[..4], &b"220 "[..]);
+
+ lmtp.write(&b"LHLO example.tld\r\n"[..])?;
+ let _read = read_lines(lmtp, &mut buffer, Some(&b"250 "[..]))?;
+
+ Ok(())
+}
+
+pub fn lmtp_deliver_email(lmtp: &mut TcpStream, email_type: Email) -> Result<()> {
+ let mut buffer: [u8; 1500] = [0; 1500];
+
+ let email = match email_type {
+ Email::Basic => EMAIL2,
+ Email::Multipart => EMAIL1,
+ };
+ lmtp.write(&b"MAIL FROM:<bob@example.tld>\r\n"[..])?;
+ let _read = read_lines(lmtp, &mut buffer, Some(&b"250 2.0.0"[..]))?;
+
+ lmtp.write(&b"RCPT TO:<alice@example.tld>\r\n"[..])?;
+ let _read = read_lines(lmtp, &mut buffer, Some(&b"250 2.1.5"[..]))?;
+
+ lmtp.write(&b"DATA\r\n"[..])?;
+ let _read = read_lines(lmtp, &mut buffer, Some(&b"354 "[..]))?;
+
+ lmtp.write(email)?;
+ lmtp.write(&b"\r\n.\r\n"[..])?;
+ let _read = read_lines(lmtp, &mut buffer, Some(&b"250 2.0.0"[..]))?;
+
+ Ok(())
+}
+
+pub fn noop_exists(imap: &mut TcpStream, must_exists: u32) -> Result<()> {
+ let mut buffer: [u8; 6000] = [0; 6000];
+
+ let mut max_retry = 20;
+ loop {
+ max_retry -= 1;
+ imap.write(&b"30 NOOP\r\n"[..])?;
+ let read = read_lines(imap, &mut buffer, Some(&b"30 OK"[..]))?;
+ let srv_msg = std::str::from_utf8(read)?;
+
+ for line in srv_msg.lines() {
+ if line.contains("EXISTS") {
+ let got = read_first_u32(line)?;
+ if got == must_exists {
+ // Done
+ return Ok(());
+ }
+ }
+ }
+
+ if max_retry <= 0 {
+ // Failed
+ bail!("no more retry");
+ }
+
+ thread::sleep(SMALL_DELAY);
+ }
+}
+
+pub fn fetch(
+ imap: &mut TcpStream,
+ selection: Selection,
+ kind: FetchKind,
+ modifier: FetchMod,
+) -> Result<String> {
+ let mut buffer: [u8; 65535] = [0; 65535];
+
+ let sel_str = match selection {
+ Selection::FirstId => "1",
+ Selection::SecondId => "2",
+ Selection::All => "1:*",
+ };
+
+ let kind_str = match kind {
+ FetchKind::Rfc822 => "RFC822",
+ FetchKind::Rfc822Size => "RFC822.SIZE",
+ };
+
+ let mod_str = match modifier {
+ FetchMod::None => "".into(),
+ FetchMod::ChangedSince(val) => format!(" (CHANGEDSINCE {})", val),
+ };
+
+ imap.write(format!("40 fetch {} {}{}\r\n", sel_str, kind_str, mod_str).as_bytes())?;
+
+ let read = read_lines(imap, &mut buffer, Some(&b"40 OK FETCH"[..]))?;
+ let srv_msg = std::str::from_utf8(read)?;
+
+ Ok(srv_msg.to_string())
+}
+
+pub fn copy(imap: &mut TcpStream, selection: Selection, to: Mailbox) -> Result<String> {
+ let mut buffer: [u8; 65535] = [0; 65535];
+ assert!(matches!(selection, Selection::FirstId));
+ assert!(matches!(to, Mailbox::Archive));
+
+ imap.write(&b"45 copy 1 ArchiveCustom\r\n"[..])?;
+ let read = read_lines(imap, &mut buffer, None)?;
+ assert_eq!(&read[..5], &b"45 OK"[..]);
+ let srv_msg = std::str::from_utf8(read)?;
+
+ Ok(srv_msg.to_string())
+}
+
+pub fn append(imap: &mut TcpStream, content: Email) -> Result<String> {
+ let mut buffer: [u8; 6000] = [0; 6000];
+
+ let ref_mail = match content {
+ Email::Multipart => EMAIL1,
+ Email::Basic => EMAIL2,
+ };
+
+ let append_cmd = format!("47 append inbox (\\Seen) {{{}}}\r\n", ref_mail.len());
+ println!("append cmd: {}", append_cmd);
+ imap.write(append_cmd.as_bytes())?;
+
+ // wait for continuation
+ let read = read_lines(imap, &mut buffer, None)?;
+ assert_eq!(read[0], b'+');
+
+ // write our stuff
+ imap.write(ref_mail)?;
+ imap.write(&b"\r\n"[..])?;
+ let read = read_lines(imap, &mut buffer, Some(&b"47 OK"[..]))?;
+ let srv_msg = std::str::from_utf8(read)?;
+
+ Ok(srv_msg.to_string())
+}
+
+pub fn search(imap: &mut TcpStream, sk: SearchKind) -> Result<String> {
+ let sk_str = match sk {
+ SearchKind::Text(x) => format!("TEXT \"{}\"", x),
+ SearchKind::ModSeq(x) => format!("MODSEQ {}", x),
+ };
+ imap.write(format!("55 SEARCH {}\r\n", sk_str).as_bytes())?;
+ let mut buffer: [u8; 1500] = [0; 1500];
+ let read = read_lines(imap, &mut buffer, Some(&b"55 OK"[..]))?;
+ let srv_msg = std::str::from_utf8(read)?;
+ Ok(srv_msg.to_string())
+}
+
+pub fn store(
+ imap: &mut TcpStream,
+ sel: Selection,
+ flag: Flag,
+ action: StoreAction,
+ modifier: StoreMod,
+) -> Result<String> {
+ let mut buffer: [u8; 6000] = [0; 6000];
+
+ let seq = match sel {
+ Selection::FirstId => "1",
+ Selection::SecondId => "2",
+ Selection::All => "1:*",
+ };
+
+ let modif = match modifier {
+ StoreMod::None => "".into(),
+ StoreMod::UnchangedSince(val) => format!(" (UNCHANGEDSINCE {})", val),
+ };
+
+ let flags_str = match flag {
+ Flag::Deleted => "(\\Deleted)",
+ Flag::Important => "(\\Important)",
+ };
+
+ let action_str = match action {
+ StoreAction::AddFlags => "+FLAGS",
+ StoreAction::DelFlags => "-FLAGS",
+ StoreAction::SetFlags => "FLAGS",
+ StoreAction::AddFlagsSilent => "+FLAGS.SILENT",
+ StoreAction::DelFlagsSilent => "-FLAGS.SILENT",
+ StoreAction::SetFlagsSilent => "FLAGS.SILENT",
+ };
+
+ imap.write(format!("57 STORE {}{} {} {}\r\n", seq, modif, action_str, flags_str).as_bytes())?;
+ let read = read_lines(imap, &mut buffer, Some(&b"57 OK"[..]))?;
+ let srv_msg = std::str::from_utf8(read)?;
+ Ok(srv_msg.to_string())
+}
+
+pub fn expunge(imap: &mut TcpStream) -> Result<()> {
+ imap.write(&b"60 expunge\r\n"[..])?;
+ let mut buffer: [u8; 1500] = [0; 1500];
+ let _read = read_lines(imap, &mut buffer, Some(&b"60 OK EXPUNGE"[..]))?;
+
+ Ok(())
+}
+
+pub fn uid_expunge(imap: &mut TcpStream, sel: Selection) -> Result<String> {
+ use Selection::*;
+ let mut buffer: [u8; 6000] = [0; 6000];
+ let selstr = match sel {
+ FirstId => "1",
+ SecondId => "2",
+ All => "1:*",
+ };
+ imap.write(format!("61 UID EXPUNGE {}\r\n", selstr).as_bytes())?;
+ let read = read_lines(imap, &mut buffer, Some(&b"61 OK"[..]))?;
+ let srv_msg = std::str::from_utf8(read)?;
+ Ok(srv_msg.to_string())
+}
+
+pub fn rename_mailbox(imap: &mut TcpStream, from: Mailbox, to: Mailbox) -> Result<()> {
+ assert!(matches!(from, Mailbox::Archive));
+ assert!(matches!(to, Mailbox::Drafts));
+
+ imap.write(&b"70 rename ArchiveCustom DraftsCustom\r\n"[..])?;
+ let mut buffer: [u8; 1500] = [0; 1500];
+ let read = read_lines(imap, &mut buffer, None)?;
+ assert_eq!(&read[..5], &b"70 OK"[..]);
+
+ imap.write(&b"71 list \"\" *\r\n"[..])?;
+ let read = read_lines(imap, &mut buffer, Some(&b"71 OK LIST"[..]))?;
+ let srv_msg = std::str::from_utf8(read)?;
+ assert!(!srv_msg.contains(" ArchiveCustom\r\n"));
+ assert!(srv_msg.contains(" INBOX\r\n"));
+ assert!(srv_msg.contains(" DraftsCustom\r\n"));
+
+ Ok(())
+}
+
+pub fn delete_mailbox(imap: &mut TcpStream, mbx: Mailbox) -> Result<()> {
+ let mbx_str = match mbx {
+ Mailbox::Inbox => "INBOX",
+ Mailbox::Archive => "ArchiveCustom",
+ Mailbox::Drafts => "DraftsCustom",
+ };
+ let cmd = format!("80 delete {}\r\n", mbx_str);
+
+ imap.write(cmd.as_bytes())?;
+ let mut buffer: [u8; 1500] = [0; 1500];
+ let read = read_lines(imap, &mut buffer, None)?;
+ assert_eq!(&read[..5], &b"80 OK"[..]);
+
+ imap.write(&b"81 list \"\" *\r\n"[..])?;
+ let read = read_lines(imap, &mut buffer, Some(&b"81 OK"[..]))?;
+ let srv_msg = std::str::from_utf8(read)?;
+ assert!(srv_msg.contains(" INBOX\r\n"));
+ assert!(!srv_msg.contains(format!(" {}\r\n", mbx_str).as_str()));
+
+ Ok(())
+}
+
+pub fn close(imap: &mut TcpStream) -> Result<()> {
+ imap.write(&b"60 close\r\n"[..])?;
+ let mut buffer: [u8; 1500] = [0; 1500];
+ let _read = read_lines(imap, &mut buffer, Some(&b"60 OK"[..]))?;
+
+ Ok(())
+}
+
+pub fn r#move(imap: &mut TcpStream, selection: Selection, to: Mailbox) -> Result<String> {
+ let mut buffer: [u8; 1500] = [0; 1500];
+ assert!(matches!(to, Mailbox::Archive));
+ assert!(matches!(selection, Selection::FirstId));
+
+ imap.write(&b"35 move 1 ArchiveCustom\r\n"[..])?;
+ let read = read_lines(imap, &mut buffer, Some(&b"35 OK"[..]))?;
+ let srv_msg = std::str::from_utf8(read)?;
+ assert!(srv_msg.contains("* 1 EXPUNGE"));
+
+ Ok(srv_msg.to_string())
+}
+
+pub fn enable(imap: &mut TcpStream, ask: Enable, done: Option<Enable>) -> Result<()> {
+ let mut buffer: [u8; 6000] = [0; 6000];
+ assert!(matches!(ask, Enable::Utf8Accept));
+
+ imap.write(&b"36 enable UTF8=ACCEPT\r\n"[..])?;
+ let read = read_lines(imap, &mut buffer, Some(&b"36 OK"[..]))?;
+ let srv_msg = std::str::from_utf8(read)?;
+ match done {
+ None => assert_eq!(srv_msg.lines().count(), 1),
+ Some(Enable::Utf8Accept) => {
+ assert_eq!(srv_msg.lines().count(), 2);
+ assert!(srv_msg.contains("* ENABLED UTF8=ACCEPT"));
+ }
+ _ => unimplemented!(),
+ }
+
+ Ok(())
+}
+
+pub fn start_idle(imap: &mut TcpStream) -> Result<()> {
+ let mut buffer: [u8; 1500] = [0; 1500];
+ imap.write(&b"98 IDLE\r\n"[..])?;
+ let read = read_lines(imap, &mut buffer, None)?;
+ assert_eq!(read[0], b'+');
+ Ok(())
+}
+
+pub fn stop_idle(imap: &mut TcpStream) -> Result<String> {
+ let mut buffer: [u8; 16536] = [0; 16536];
+ imap.write(&b"DONE\r\n"[..])?;
+ let read = read_lines(imap, &mut buffer, Some(&b"98 OK"[..]))?;
+ let srv_msg = std::str::from_utf8(read)?;
+ Ok(srv_msg.to_string())
+}
+
+pub fn logout(imap: &mut TcpStream) -> Result<()> {
+ imap.write(&b"99 logout\r\n"[..])?;
+ let mut buffer: [u8; 1500] = [0; 1500];
+ let read = read_lines(imap, &mut buffer, None)?;
+ assert_eq!(&read[..5], &b"* BYE"[..]);
+ Ok(())
+}
diff --git a/aerogramme/tests/common/mod.rs b/aerogramme/tests/common/mod.rs
new file mode 100644
index 0000000..cbe0271
--- /dev/null
+++ b/aerogramme/tests/common/mod.rs
@@ -0,0 +1,99 @@
+#![allow(dead_code)]
+pub mod constants;
+pub mod fragments;
+
+use anyhow::{bail, Context, Result};
+use std::io::Read;
+use std::net::{Shutdown, TcpStream};
+use std::process::Command;
+use std::thread;
+
+use constants::SMALL_DELAY;
+
+pub fn aerogramme_provider_daemon_dev(
+ mut fx: impl FnMut(&mut TcpStream, &mut TcpStream) -> Result<()>,
+) -> Result<()> {
+ // Check port is not used (= free) before starting the test
+ let mut max_retry = 20;
+ loop {
+ max_retry -= 1;
+ match (TcpStream::connect("[::1]:1143"), max_retry) {
+ (Ok(_), 0) => bail!("something is listening on [::1]:1143 and prevent the test from starting"),
+ (Ok(_), _) => println!("something is listening on [::1]:1143, maybe a previous daemon quitting, retrying soon..."),
+ (Err(_), _) => {
+ println!("test ready to start, [::1]:1143 is free!");
+ break
+ }
+ }
+ thread::sleep(SMALL_DELAY);
+ }
+
+ // Start daemon
+ let mut daemon = Command::new(env!("CARGO_BIN_EXE_aerogramme"))
+ .arg("--dev")
+ .arg("provider")
+ .arg("daemon")
+ .spawn()?;
+
+ // Check that our daemon is correctly listening on the free port
+ let mut max_retry = 20;
+ let mut imap_socket = loop {
+ max_retry -= 1;
+ match (TcpStream::connect("[::1]:1143"), max_retry) {
+ (Err(e), 0) => bail!("no more retry, last error is: {}", e),
+ (Err(e), _) => {
+ println!("unable to connect: {} ; will retry soon...", e);
+ }
+ (Ok(v), _) => break v,
+ }
+ thread::sleep(SMALL_DELAY);
+ };
+
+ // Assuming now it's safe to open a LMTP socket
+ let mut lmtp_socket =
+ TcpStream::connect("[::1]:1025").context("lmtp socket must be connected")?;
+
+ println!("-- ready to test imap features --");
+ let result = fx(&mut imap_socket, &mut lmtp_socket);
+ println!("-- test teardown --");
+
+ imap_socket
+ .shutdown(Shutdown::Both)
+ .context("closing imap socket at the end of the test")?;
+ lmtp_socket
+ .shutdown(Shutdown::Both)
+ .context("closing lmtp socket at the end of the test")?;
+ daemon.kill().context("daemon should be killed")?;
+
+ result.context("all tests passed")
+}
+
+pub fn read_lines<'a, F: Read>(
+ reader: &mut F,
+ buffer: &'a mut [u8],
+ stop_marker: Option<&[u8]>,
+) -> Result<&'a [u8]> {
+ let mut nbytes = 0;
+ loop {
+ nbytes += reader.read(&mut buffer[nbytes..])?;
+ //println!("partial read: {}", std::str::from_utf8(&buffer[..nbytes])?);
+ let pre_condition = match stop_marker {
+ None => true,
+ Some(mark) => buffer[..nbytes].windows(mark.len()).any(|w| w == mark),
+ };
+ if pre_condition && nbytes >= 2 && &buffer[nbytes - 2..nbytes] == &b"\r\n"[..] {
+ break;
+ }
+ }
+ println!("read: {}", std::str::from_utf8(&buffer[..nbytes])?);
+ Ok(&buffer[..nbytes])
+}
+
+pub fn read_first_u32(inp: &str) -> Result<u32> {
+ Ok(inp
+ .chars()
+ .skip_while(|c| !c.is_digit(10))
+ .take_while(|c| c.is_digit(10))
+ .collect::<String>()
+ .parse::<u32>()?)
+}