1169 lines
41 KiB
Rust
1169 lines
41 KiB
Rust
use std::borrow::Cow;
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use std::num::NonZeroU32;
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use std::sync::Arc;
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use std::iter::zip;
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use anyhow::{anyhow, bail, Error, Result};
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use boitalettres::proto::res::body::Data as Body;
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use chrono::{Offset, TimeZone, Utc};
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use futures::future::join_all;
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use futures::stream::{FuturesOrdered, StreamExt};
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use imap_codec::types::address::Address;
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use imap_codec::types::body::{BasicFields, Body as FetchBody, BodyStructure, SpecificFields};
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use imap_codec::types::core::{AString, Atom, IString, NString};
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use imap_codec::types::datetime::MyDateTime;
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use imap_codec::types::envelope::Envelope;
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use imap_codec::types::fetch_attributes::{
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FetchAttribute, MacroOrFetchAttributes, Section as FetchSection,
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};
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use imap_codec::types::flag::{Flag, StoreResponse, StoreType};
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use imap_codec::types::response::{Code, Data, MessageAttribute, Status};
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use imap_codec::types::sequence::{self, SequenceSet};
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use eml_codec::{
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header,
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imf,
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part::{AnyPart, composite::Message},
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mime::r#type::Deductible,
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mime,
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};
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use crate::cryptoblob::Key;
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use crate::mail::mailbox::{Mailbox, MailMeta};
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use crate::mail::uidindex::{ImapUid, ImapUidvalidity, UidIndex};
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use crate::mail::unique_ident::UniqueIdent;
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const DEFAULT_FLAGS: [Flag; 5] = [
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Flag::Seen,
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Flag::Answered,
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Flag::Flagged,
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Flag::Deleted,
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Flag::Draft,
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];
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enum FetchedMail<'a> {
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Partial(imf::Imf<'a>),
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Full(Message<'a>),
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}
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impl<'a> FetchedMail<'a> {
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fn as_full(&self) -> Result<&Message<'a>> {
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match self {
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FetchedMail::Full(x) => Ok(&x),
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_ => bail!("The full message must be fetched, not only its headers: it's a logic error"),
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}
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}
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fn imf(&self) -> &imf::Imf<'a> {
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match self {
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FetchedMail::Full(x) => &x.imf,
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FetchedMail::Partial(x) => &x,
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}
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}
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}
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pub struct AttributesProxy {
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attrs: Vec<FetchAttribute>
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}
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impl AttributesProxy {
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fn new(attrs: &MacroOrFetchAttributes, is_uid_fetch: bool) -> Self {
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// Expand macros
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let mut fetch_attrs = match attrs {
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MacroOrFetchAttributes::Macro(m) => m.expand(),
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MacroOrFetchAttributes::FetchAttributes(a) => a.clone(),
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};
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// Handle uids
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if *is_uid_fetch && !fetch_attrs.contains(&FetchAttribute::Uid) {
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fetch_attrs.push(FetchAttribute::Uid);
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}
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Self { attrs: fetch_attrs }
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}
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fn need_body(&self) -> bool {
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self.attrs.iter().any(|x| {
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matches!(
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x,
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FetchAttribute::Body
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| FetchAttribute::BodyExt { .. }
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| FetchAttribute::Rfc822
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| FetchAttribute::Rfc822Text
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| FetchAttribute::BodyStructure
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)
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})
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}
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}
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pub struct MailIdentifiers {
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i: NonZeroU32,
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uid: ImapUid,
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uuid: UniqueIdent,
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}
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pub struct MailView<'a> {
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ids: &'a MailIdentifiers,
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meta: &'a MailMeta,
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flags: &'a Vec<Flag>,
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content: FetchedMail<'a>,
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add_seen: bool
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}
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impl<'a> MailView<'a> {
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fn uid(&self) -> MessageAttribute {
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MessageAttribute::Uid(self.ids.uid)
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}
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fn flags(&self) -> MessageAttribute {
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MessageAttribute::Flags(
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self.flags.iter().filter_map(|f| string_to_flag(f)).collect(),
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)
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}
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fn rfc_822_size(&self) -> MessageAttribute {
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MessageAttribute::Rfc822Size(self.meta.rfc822_size as u32)
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}
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fn rfc_822_header(&self) -> MessageAttribute {
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MessageAttribute::Rfc822Header(NString(self.meta.headers.to_vec().try_into().ok().map(IString::Literal)))
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}
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fn rfc_822_text(&self) -> Result<MessageAttribute> {
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Ok(MessageAttribute::Rfc822Text(NString(
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self.content.as_full()?.raw_body.try_into().ok().map(IString::Literal),
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)))
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}
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fn rfc822(&self) -> Result<MessageAttribute> {
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Ok(MessageAttribute::Rfc822(NString(
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self.content.as_full()?.raw_body.clone().try_into().ok().map(IString::Literal))))
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}
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fn envelope(&self) -> MessageAttribute {
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message_envelope(self.content.imf())
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}
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fn body(&self) -> Result<MessageAttribute> {
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Ok(MessageAttribute::Body(
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build_imap_email_struct(self.content.as_full()?.child.as_ref())?,
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))
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}
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fn body_structure(&self) -> Result<MessageAttribute> {
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Ok(MessageAttribute::Body(
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build_imap_email_struct(self.content.as_full()?.child.as_ref())?,
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))
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}
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/// maps to BODY[<section>]<<partial>> and BODY.PEEK[<section>]<<partial>>
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/// peek does not implicitly set the \Seen flag
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/// eg. BODY[HEADER.FIELDS (DATE FROM)]
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/// eg. BODY[]<0.2048>
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fn body_ext(&mut self, section: Option<FetchSection>, partial: Option<(u32, NonZeroU32)>, peek: bool) -> Result<Option<MessageAttribute>> {
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// Extract message section
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match get_message_section(self.content.as_full()?, section) {
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Ok(text) => {
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let seen_flag = Flag::Seen.to_string();
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if !peek && !self.flags.iter().any(|x| *x == seen_flag) {
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// Add \Seen flag
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//self.mailbox.add_flags(uuid, &[seen_flag]).await?;
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self.add_seen = true;
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}
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// Handle <<partial>> which cut the message bytes
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let (text, origin) = apply_partial(partial, text);
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let data = NString(text.to_vec().try_into().ok().map(IString::Literal));
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return Ok(Some(MessageAttribute::BodyExt {
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section: section.clone(),
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origin,
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data,
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}))
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}
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Err(e) => {
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tracing::error!(
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"Could not get section {:?} of message {}: {}",
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section,
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self.mi.uuid,
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e
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);
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return Ok(None)
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}
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}
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}
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fn internal_date(&self) -> Result<MessageAttribute> {
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let dt = Utc.fix().timestamp_opt(i64::try_from(self.meta.internaldate / 1000)?, 0).earliest().ok_or(anyhow!("Unable to parse internal date"))?;
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Ok(MessageAttribute::InternalDate(MyDateTime(dt)))
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}
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fn filter(&mut self, ap: &AttributesProxy) -> Result<Option<Body>> {
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let res_attrs = ap.attrs.iter().filter_map(|attr| match attr {
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FetchAttribute::Uid => Some(self.uid()),
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FetchAttribute::Flags => Some(self.flags()),
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FetchAttribute::Rfc822Size => Some(self.rfc_822_size()),
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FetchAttribute::Rfc822Header => Some(self.rfc_822_header()),
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FetchAttribute::Rfc822Text => Some(self.rfc_822_text()?),
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FetchAttribute::Rfc822 => Some(self.rfc822()?),
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FetchAttribute::Envelope => Some(self.envelope()),
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FetchAttribute::Body => Some(self.body()?),
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FetchAttribute::BodyStructure => Some(self.body_structure()?),
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FetchAttribute::BodyExt { section, partial, peek } => self.body_ext(section, partial, peek)?,
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FetchAttribute::InternalDate => Some(self.internal_date()?)
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}).collect::<Vec<_>>();
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Body::Data(Data::Fetch {
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seq_or_uid: self.ids.i,
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res_attrs,
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})
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}
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}
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fn apply_partial(partial: Option<(u32, NonZeroU32)>, text: &[u8]) -> (&[u8], Option<u32>) {
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match partial {
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Some((begin, len)) => {
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if *begin as usize > text.len() {
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(&[][..], Some(*begin))
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} else if (*begin + len.get()) as usize >= text.len() {
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(&text[*begin as usize..], Some(*begin))
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} else {
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(
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&text[*begin as usize..(*begin + len.get()) as usize],
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Some(*begin),
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)
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}
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}
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None => (&text[..], None),
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};
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}
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pub struct BodyIdentifier<'a> {
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msg_uuid: &'a UniqueIdent,
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msg_key: &'a Key,
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}
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#[derive(Default)]
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pub struct MailSelectionBuilder<'a> {
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//attrs: AttributeProxy,
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mail_count: usize,
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need_body: bool,
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mi: &'a [MailIdentifiers],
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meta: &'a [MailMeta],
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flags: &'a [Vec<Flag>],
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bodies: Vec<FetchedMail<'a>>,
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}
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impl<'a> MailSelectionBuilder<'a> {
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fn new(need_body: bool, mail_count: usize) -> Self {
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Self {
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mail_count,
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need_body,
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bodies: vec![0; mail_count],
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..MailSelectionBuilder::default()
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}
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}
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fn with_mail_identifiers(mut self, mi: &[MailIdentifiers]) -> Self {
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self.mi = mi;
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self
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}
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fn uuids(&self) -> Vec<&UniqueIdent> {
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self.mi.iter().map(|i| i.uuid ).collect::<Vec<_>>()
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}
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fn with_metadata(mut self, meta: &[MailMeta]) -> Self {
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self.meta = meta;
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self
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}
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fn with_flags(mut self, flags: &[Vec<Flag>]) -> Self {
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self.flags = flags;
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self
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}
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fn bodies_to_collect(&self) -> Vec<BodyIdentifier> {
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if !self.attrs.need_body() {
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return vec![]
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}
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zip(self.mi, self.meta).as_ref().iter().enumerate().map(|(i , (mi, k))| BodyIdentifier { i, mi, k }).collect::<Vec<_>>()
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}
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fn with_bodies(mut self, rbodies: &[&'a [u8]]) -> Self {
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for rb in rbodies.iter() {
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let (_, p) = eml_codec::parse_message(&rb).or(Err(anyhow!("Invalid mail body")))?;
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self.bodies.push(FetchedMail::Full(p));
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}
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self
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}
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fn build(self) -> Result<Vec<MailView<'a>>> {
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if !self.need_body && self.bodies.len() == 0 {
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for m in self.meta.iter() {
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let (_, hdrs) = eml_codec::parse_imf(&self.meta.headers).or(Err(anyhow!("Invalid mail headers")))?;
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self.bodies.push(FetchedMail::Partial(hdrs));
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}
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}
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if self.mi.len() != self.mail_count && self.meta.len() != self.mail_count || self.flags.len() != self.mail_count || self.bodies.len() != self.mail_count {
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return Err(anyhow!("Can't build a mail view selection as parts were not correctly registered into the builder."))
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}
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let views = Vec::with_capacity(self.mail_count);
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for (ids, meta, flags, content) in zip(self.mi, self.meta, self.flags, self.bodies) {
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let mv = MailView { ids, meta, flags, content };
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views.push(mv);
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}
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return Ok(views)
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}
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}
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/// A MailboxView is responsible for giving the client the information
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/// it needs about a mailbox, such as an initial summary of the mailbox's
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/// content and continuous updates indicating when the content
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/// of the mailbox has been changed.
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/// To do this, it keeps a variable `known_state` that corresponds to
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/// what the client knows, and produces IMAP messages to be sent to the
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/// client that go along updates to `known_state`.
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pub struct MailboxView {
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pub(crate) mailbox: Arc<Mailbox>,
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known_state: UidIndex,
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}
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impl MailboxView {
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/// Creates a new IMAP view into a mailbox.
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/// Generates the necessary IMAP messages so that the client
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/// has a satisfactory summary of the current mailbox's state.
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/// These are the messages that are sent in response to a SELECT command.
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pub async fn new(mailbox: Arc<Mailbox>) -> Result<(Self, Vec<Body>)> {
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let state = mailbox.current_uid_index().await;
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let new_view = Self {
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mailbox,
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known_state: state,
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};
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let mut data = Vec::<Body>::new();
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data.push(new_view.exists_status()?);
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data.push(new_view.recent_status()?);
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data.extend(new_view.flags_status()?.into_iter());
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data.push(new_view.uidvalidity_status()?);
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data.push(new_view.uidnext_status()?);
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Ok((new_view, data))
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}
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/// Produces a set of IMAP responses describing the change between
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/// what the client knows and what is actually in the mailbox.
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/// This does NOT trigger a sync, it bases itself on what is currently
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/// loaded in RAM by Bayou.
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pub async fn update(&mut self) -> Result<Vec<Body>> {
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let new_view = MailboxView {
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mailbox: self.mailbox.clone(),
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known_state: self.mailbox.current_uid_index().await,
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};
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let mut data = Vec::<Body>::new();
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// Calculate diff between two mailbox states
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// See example in IMAP RFC in section on NOOP command:
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// we want to produce something like this:
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// C: a047 NOOP
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// S: * 22 EXPUNGE
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// S: * 23 EXISTS
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// S: * 14 FETCH (UID 1305 FLAGS (\Seen \Deleted))
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// S: a047 OK Noop completed
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// In other words:
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// - notify client of expunged mails
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// - if new mails arrived, notify client of number of existing mails
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// - if flags changed for existing mails, tell client
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// (for this last step: if uidvalidity changed, do nothing,
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// just notify of new uidvalidity and they will resync)
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// - notify client of expunged mails
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let mut n_expunge = 0;
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for (i, (_uid, uuid)) in self.known_state.idx_by_uid.iter().enumerate() {
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if !new_view.known_state.table.contains_key(uuid) {
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data.push(Body::Data(Data::Expunge(
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NonZeroU32::try_from((i + 1 - n_expunge) as u32).unwrap(),
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)));
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n_expunge += 1;
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}
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}
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// - if new mails arrived, notify client of number of existing mails
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if new_view.known_state.table.len() != self.known_state.table.len() - n_expunge
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|| new_view.known_state.uidvalidity != self.known_state.uidvalidity
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{
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data.push(new_view.exists_status()?);
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}
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if new_view.known_state.uidvalidity != self.known_state.uidvalidity {
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// TODO: do we want to push less/more info than this?
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data.push(new_view.uidvalidity_status()?);
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data.push(new_view.uidnext_status()?);
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} else {
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// - if flags changed for existing mails, tell client
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for (i, (_uid, uuid)) in new_view.known_state.idx_by_uid.iter().enumerate() {
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let old_mail = self.known_state.table.get(uuid);
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let new_mail = new_view.known_state.table.get(uuid);
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if old_mail.is_some() && old_mail != new_mail {
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if let Some((uid, flags)) = new_mail {
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data.push(Body::Data(Data::Fetch {
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seq_or_uid: NonZeroU32::try_from((i + 1) as u32).unwrap(),
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attributes: vec![
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MessageAttribute::Uid(*uid),
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MessageAttribute::Flags(
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flags.iter().filter_map(|f| string_to_flag(f)).collect(),
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),
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],
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}));
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}
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}
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}
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}
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*self = new_view;
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Ok(data)
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}
|
|
|
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pub async fn store(
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&mut self,
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sequence_set: &SequenceSet,
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kind: &StoreType,
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_response: &StoreResponse,
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flags: &[Flag],
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is_uid_store: &bool,
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) -> Result<Vec<Body>> {
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self.mailbox.opportunistic_sync().await?;
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let flags = flags.iter().map(|x| x.to_string()).collect::<Vec<_>>();
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|
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let mails = self.get_mail_ids(sequence_set, *is_uid_store)?;
|
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for (_i, _uid, uuid) in mails.iter() {
|
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match kind {
|
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StoreType::Add => {
|
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self.mailbox.add_flags(*uuid, &flags[..]).await?;
|
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}
|
|
StoreType::Remove => {
|
|
self.mailbox.del_flags(*uuid, &flags[..]).await?;
|
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}
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StoreType::Replace => {
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self.mailbox.set_flags(*uuid, &flags[..]).await?;
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}
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}
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}
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|
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// @TODO: handle _response
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self.update().await
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}
|
|
|
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pub async fn expunge(&mut self) -> Result<Vec<Body>> {
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self.mailbox.opportunistic_sync().await?;
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|
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let deleted_flag = Flag::Deleted.to_string();
|
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let state = self.mailbox.current_uid_index().await;
|
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let msgs = state
|
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.table
|
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.iter()
|
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.filter(|(_uuid, (_uid, flags))| flags.iter().any(|x| *x == deleted_flag))
|
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.map(|(uuid, _)| *uuid);
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|
|
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for msg in msgs {
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self.mailbox.delete(msg).await?;
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}
|
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|
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self.update().await
|
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}
|
|
|
|
pub async fn copy(
|
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&self,
|
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sequence_set: &SequenceSet,
|
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to: Arc<Mailbox>,
|
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is_uid_copy: &bool,
|
|
) -> Result<(ImapUidvalidity, Vec<(ImapUid, ImapUid)>)> {
|
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let mails = self.get_mail_ids(sequence_set, *is_uid_copy)?;
|
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|
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let mut new_uuids = vec![];
|
|
for (_i, _uid, uuid) in mails.iter() {
|
|
new_uuids.push(to.copy_from(&self.mailbox, *uuid).await?);
|
|
}
|
|
|
|
let mut ret = vec![];
|
|
let to_state = to.current_uid_index().await;
|
|
for ((_i, uid, _uuid), new_uuid) in mails.iter().zip(new_uuids.iter()) {
|
|
let dest_uid = to_state
|
|
.table
|
|
.get(new_uuid)
|
|
.ok_or(anyhow!("copied mail not in destination mailbox"))?
|
|
.0;
|
|
ret.push((*uid, dest_uid));
|
|
}
|
|
|
|
Ok((to_state.uidvalidity, ret))
|
|
}
|
|
|
|
/// Looks up state changes in the mailbox and produces a set of IMAP
|
|
/// responses describing the new state.
|
|
pub async fn fetch(
|
|
&self,
|
|
sequence_set: &SequenceSet,
|
|
attributes: &MacroOrFetchAttributes,
|
|
is_uid_fetch: &bool,
|
|
) -> Result<Vec<Body>> {
|
|
|
|
let ap = AttributesProxy::new(attributes, *is_uid_fetch);
|
|
let mail_count = sequence_set.iter().count();
|
|
|
|
// Fetch various metadata about the email selection
|
|
let selection = MailSelectionBuilder::new(ap.need_body(), mail_count);
|
|
selection.with_mail_identifiers(self.get_mail_ids(sequence_set, *is_uid_fetch)?);
|
|
selection.with_metadata(self.mailbox.fetch_meta(&selection.uuids()).await?);
|
|
selection.with_flags(self.known_state.table.get(&selection.uuids()).map(|(_, flags)| flags).collect::<Vec<_>>());
|
|
|
|
// Asynchronously fetch full bodies (if needed)
|
|
let future_bodies = selection.bodies_to_collect().iter().map(|bi| async move {
|
|
let body = self.mailbox.fetch_full(bi.msg_uuid, bi.msg_key).await?;
|
|
Ok::<_, anyhow::Error>(bi, body)
|
|
}).collect::<FuturesOrdered<_>>();
|
|
let bodies = join_all(future_bodies).await.into_iter().collect::<Result<Vec<_>, _>>()?;
|
|
selection.with_bodies(bodies);
|
|
|
|
/* while let Some(m) = future_bodies.next().await {
|
|
let (bi, body) = m?;
|
|
selection.with_body(bi.pos, body);
|
|
}*/
|
|
|
|
// Build mail selection views
|
|
let views = selection.build()?;
|
|
|
|
// Filter views to build the result
|
|
let mut ret = Vec::with_capacity(mail_count);
|
|
for mail_view in views.iter() {
|
|
let maybe_body = mail_view.filter(&ap)?;
|
|
if let Some(body) = maybe_body {
|
|
ret.push(body)
|
|
}
|
|
}
|
|
|
|
// Register seen flags
|
|
let future_flags = views.iter().filter(|mv| mv.add_seen).map(|mv| async move {
|
|
let seen_flag = Flag::Seen.to_string();
|
|
self.mailbox.add_flags(mv.mi.uuid, &[seen_flag]).await?;
|
|
Ok::<_, anyhow::Error>(())
|
|
}).collect::<FuturesOrdered<_>>();
|
|
join_all(future_flags).await.iter().find(Result::is_err).unwrap_or(Ok(()))?;
|
|
|
|
Ok(ret)
|
|
}
|
|
|
|
// ----
|
|
|
|
// Gets the IMAP ID, the IMAP UIDs and, the Aerogramme UUIDs of mails identified by a SequenceSet of
|
|
// sequence numbers (~ IMAP selector)
|
|
fn get_mail_ids(
|
|
&self,
|
|
sequence_set: &SequenceSet,
|
|
by_uid: bool,
|
|
) -> Result<Vec<MailIdentifiers>> {
|
|
let mail_vec = self
|
|
.known_state
|
|
.idx_by_uid
|
|
.iter()
|
|
.map(|(uid, uuid)| (*uid, *uuid))
|
|
.collect::<Vec<_>>();
|
|
|
|
let mut mails = vec![];
|
|
|
|
if by_uid {
|
|
if mail_vec.is_empty() {
|
|
return Ok(vec![]);
|
|
}
|
|
let iter_strat = sequence::Strategy::Naive {
|
|
largest: mail_vec.last().unwrap().0,
|
|
};
|
|
|
|
let mut i = 0;
|
|
for uid in sequence_set.iter(iter_strat) {
|
|
while mail_vec.get(i).map(|mail| mail.0 < uid).unwrap_or(false) {
|
|
i += 1;
|
|
}
|
|
if let Some(mail) = mail_vec.get(i) {
|
|
if mail.0 == uid {
|
|
mails.push(MailIdentifiers { id: NonZeroU32::try_from(i as u32 + 1).unwrap(), uid: mail.0, uuid: mail.1 });
|
|
}
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
} else {
|
|
if mail_vec.is_empty() {
|
|
bail!("No such message (mailbox is empty)");
|
|
}
|
|
|
|
let iter_strat = sequence::Strategy::Naive {
|
|
largest: NonZeroU32::try_from((mail_vec.len()) as u32).unwrap(),
|
|
};
|
|
|
|
for i in sequence_set.iter(iter_strat) {
|
|
if let Some(mail) = mail_vec.get(i.get() as usize - 1) {
|
|
mails.push(MailIdentifiers { id: i, uid: mail.0, uuid: mail.1 });
|
|
} else {
|
|
bail!("No such mail: {}", i);
|
|
}
|
|
}
|
|
}
|
|
|
|
Ok(mails)
|
|
}
|
|
|
|
// ----
|
|
|
|
/// Produce an OK [UIDVALIDITY _] message corresponding to `known_state`
|
|
fn uidvalidity_status(&self) -> Result<Body> {
|
|
let uid_validity = Status::ok(
|
|
None,
|
|
Some(Code::UidValidity(self.uidvalidity())),
|
|
"UIDs valid",
|
|
)
|
|
.map_err(Error::msg)?;
|
|
Ok(Body::Status(uid_validity))
|
|
}
|
|
|
|
pub(crate) fn uidvalidity(&self) -> ImapUidvalidity {
|
|
self.known_state.uidvalidity
|
|
}
|
|
|
|
/// Produce an OK [UIDNEXT _] message corresponding to `known_state`
|
|
fn uidnext_status(&self) -> Result<Body> {
|
|
let next_uid = Status::ok(
|
|
None,
|
|
Some(Code::UidNext(self.uidnext())),
|
|
"Predict next UID",
|
|
)
|
|
.map_err(Error::msg)?;
|
|
Ok(Body::Status(next_uid))
|
|
}
|
|
|
|
pub(crate) fn uidnext(&self) -> ImapUid {
|
|
self.known_state.uidnext
|
|
}
|
|
|
|
/// Produce an EXISTS message corresponding to the number of mails
|
|
/// in `known_state`
|
|
fn exists_status(&self) -> Result<Body> {
|
|
Ok(Body::Data(Data::Exists(self.exists()?)))
|
|
}
|
|
|
|
pub(crate) fn exists(&self) -> Result<u32> {
|
|
Ok(u32::try_from(self.known_state.idx_by_uid.len())?)
|
|
}
|
|
|
|
/// Produce a RECENT message corresponding to the number of
|
|
/// recent mails in `known_state`
|
|
fn recent_status(&self) -> Result<Body> {
|
|
Ok(Body::Data(Data::Recent(self.recent()?)))
|
|
}
|
|
|
|
pub(crate) fn recent(&self) -> Result<u32> {
|
|
let recent = self
|
|
.known_state
|
|
.idx_by_flag
|
|
.get(&"\\Recent".to_string())
|
|
.map(|os| os.len())
|
|
.unwrap_or(0);
|
|
Ok(u32::try_from(recent)?)
|
|
}
|
|
|
|
/// Produce a FLAGS and a PERMANENTFLAGS message that indicates
|
|
/// the flags that are in `known_state` + default flags
|
|
fn flags_status(&self) -> Result<Vec<Body>> {
|
|
let mut flags: Vec<Flag> = self
|
|
.known_state
|
|
.idx_by_flag
|
|
.flags()
|
|
.filter_map(|f| string_to_flag(f))
|
|
.collect();
|
|
for f in DEFAULT_FLAGS.iter() {
|
|
if !flags.contains(f) {
|
|
flags.push(f.clone());
|
|
}
|
|
}
|
|
let mut ret = vec![Body::Data(Data::Flags(flags.clone()))];
|
|
|
|
flags.push(Flag::Permanent);
|
|
let permanent_flags =
|
|
Status::ok(None, Some(Code::PermanentFlags(flags)), "Flags permitted")
|
|
.map_err(Error::msg)?;
|
|
ret.push(Body::Status(permanent_flags));
|
|
|
|
Ok(ret)
|
|
}
|
|
|
|
pub(crate) fn unseen_count(&self) -> usize {
|
|
let total = self.known_state.table.len();
|
|
let seen = self
|
|
.known_state
|
|
.idx_by_flag
|
|
.get(&Flag::Seen.to_string())
|
|
.map(|x| x.len())
|
|
.unwrap_or(0);
|
|
total - seen
|
|
}
|
|
}
|
|
|
|
fn string_to_flag(f: &str) -> Option<Flag> {
|
|
match f.chars().next() {
|
|
Some('\\') => match f {
|
|
"\\Seen" => Some(Flag::Seen),
|
|
"\\Answered" => Some(Flag::Answered),
|
|
"\\Flagged" => Some(Flag::Flagged),
|
|
"\\Deleted" => Some(Flag::Deleted),
|
|
"\\Draft" => Some(Flag::Draft),
|
|
"\\Recent" => Some(Flag::Recent),
|
|
_ => match Atom::try_from(f.strip_prefix('\\').unwrap().to_string()) {
|
|
Err(_) => {
|
|
tracing::error!(flag=%f, "Unable to encode flag as IMAP atom");
|
|
None
|
|
}
|
|
Ok(a) => Some(Flag::Extension(a)),
|
|
},
|
|
},
|
|
Some(_) => match Atom::try_from(f.to_string()) {
|
|
Err(_) => {
|
|
tracing::error!(flag=%f, "Unable to encode flag as IMAP atom");
|
|
None
|
|
}
|
|
Ok(a) => Some(Flag::Keyword(a)),
|
|
},
|
|
None => None,
|
|
}
|
|
}
|
|
|
|
/// Envelope rules are defined in RFC 3501, section 7.4.2
|
|
/// https://datatracker.ietf.org/doc/html/rfc3501#section-7.4.2
|
|
///
|
|
/// Some important notes:
|
|
///
|
|
/// If the Sender or Reply-To lines are absent in the [RFC-2822]
|
|
/// header, or are present but empty, the server sets the
|
|
/// corresponding member of the envelope to be the same value as
|
|
/// the from member (the client is not expected to know to do
|
|
/// this). Note: [RFC-2822] requires that all messages have a valid
|
|
/// From header. Therefore, the from, sender, and reply-to
|
|
/// members in the envelope can not be NIL.
|
|
///
|
|
/// If the Date, Subject, In-Reply-To, and Message-ID header lines
|
|
/// are absent in the [RFC-2822] header, the corresponding member
|
|
/// of the envelope is NIL; if these header lines are present but
|
|
/// empty the corresponding member of the envelope is the empty
|
|
/// string.
|
|
|
|
//@FIXME return an error if the envelope is invalid instead of panicking
|
|
//@FIXME some fields must be defaulted if there are not set.
|
|
fn message_envelope(msg: &imf::Imf) -> Envelope {
|
|
let from = msg.from.iter().map(convert_mbx).collect::<Vec<_>>();
|
|
|
|
Envelope {
|
|
date: NString(
|
|
msg.date.as_ref()
|
|
.map(|d| IString::try_from(d.to_rfc3339()).unwrap()),
|
|
),
|
|
subject: NString(
|
|
msg.subject.as_ref()
|
|
.map(|d| IString::try_from(d.to_string()).unwrap()),
|
|
),
|
|
sender: msg.sender.as_ref().map(|v| vec![convert_mbx(v)]).unwrap_or(from.clone()),
|
|
reply_to: if msg.reply_to.is_empty() {
|
|
from.clone()
|
|
} else {
|
|
convert_addresses(&msg.reply_to)
|
|
},
|
|
from: from,
|
|
to: convert_addresses(&msg.to),
|
|
cc: convert_addresses(&msg.cc),
|
|
bcc: convert_addresses(&msg.bcc),
|
|
in_reply_to: NString(msg.in_reply_to.iter().next().map(|d| IString::try_from(d.to_string()).unwrap())),
|
|
message_id: NString(
|
|
msg.msg_id.as_ref().map(|d| IString::try_from(d.to_string()).unwrap()),
|
|
),
|
|
}
|
|
}
|
|
|
|
fn convert_addresses(addrlist: &Vec<imf::address::AddressRef>) -> Vec<Address> {
|
|
let mut acc = vec![];
|
|
for item in addrlist {
|
|
match item {
|
|
imf::address::AddressRef::Single(a) => acc.push(convert_mbx(a)),
|
|
imf::address::AddressRef::Many(l) => acc.extend(l.participants.iter().map(convert_mbx))
|
|
}
|
|
}
|
|
return acc
|
|
}
|
|
|
|
fn convert_mbx(addr: &imf::mailbox::MailboxRef) -> Address {
|
|
Address::new(
|
|
NString(addr.name.as_ref().map(|x| IString::try_from(x.to_string()).unwrap())),
|
|
// SMTP at-domain-list (source route) seems obsolete since at least 1991
|
|
// https://www.mhonarc.org/archive/html/ietf-822/1991-06/msg00060.html
|
|
NString(None),
|
|
NString(Some(IString::try_from(addr.addrspec.local_part.to_string()).unwrap())),
|
|
NString(Some(IString::try_from(addr.addrspec.domain.to_string()).unwrap())),
|
|
)
|
|
}
|
|
|
|
/*
|
|
--CAPTURE--
|
|
b fetch 29878:29879 (BODY)
|
|
* 29878 FETCH (BODY (("text" "plain" ("charset" "utf-8") NIL NIL "quoted-printable" 3264 82)("text" "html" ("charset" "utf-8") NIL NIL "quoted-printable" 31834 643) "alternative"))
|
|
* 29879 FETCH (BODY ("text" "html" ("charset" "us-ascii") NIL NIL "7bit" 4107 131))
|
|
^^^^^^^^^^^^^^^^^^^^^^ ^^^ ^^^ ^^^^^^ ^^^^ ^^^
|
|
| | | | | | number of lines
|
|
| | | | | size
|
|
| | | | content transfer encoding
|
|
| | | description
|
|
| | id
|
|
| parameter list
|
|
b OK Fetch completed (0.001 + 0.000 secs).
|
|
*/
|
|
|
|
fn build_imap_email_struct<'a>(part: &AnyPart<'a>) -> Result<BodyStructure> {
|
|
match part {
|
|
AnyPart::Mult(x) => {
|
|
let itype = &x.mime.interpreted_type;
|
|
let subtype = IString::try_from(itype.subtype.to_string()).unwrap_or(unchecked_istring("alternative"));
|
|
|
|
Ok(BodyStructure::Multi {
|
|
bodies: x.children
|
|
.iter()
|
|
.filter_map(|inner| build_imap_email_struct(&inner).ok())
|
|
.collect(),
|
|
subtype,
|
|
extension_data: None,
|
|
/*Some(MultipartExtensionData {
|
|
parameter_list: vec![],
|
|
disposition: None,
|
|
language: None,
|
|
location: None,
|
|
extension: vec![],
|
|
})*/
|
|
})
|
|
}
|
|
AnyPart::Txt(x) => {
|
|
let mut basic = basic_fields(&x.mime.fields, x.body.len())?;
|
|
|
|
// Get the interpreted content type, set it
|
|
let itype = match &x.mime.interpreted_type {
|
|
Deductible::Inferred(v) | Deductible::Explicit(v) => v
|
|
};
|
|
let subtype = IString::try_from(itype.subtype.to_string()).unwrap_or(unchecked_istring("plain"));
|
|
|
|
// Add charset to the list of parameters if we know it has been inferred as it will be
|
|
// missing from the parsed content.
|
|
if let Deductible::Inferred(charset) = &itype.charset {
|
|
basic.parameter_list.push((
|
|
unchecked_istring("charset"),
|
|
IString::try_from(charset.to_string()).unwrap_or(unchecked_istring("us-ascii"))
|
|
));
|
|
}
|
|
|
|
Ok(BodyStructure::Single {
|
|
body: FetchBody {
|
|
basic,
|
|
specific: SpecificFields::Text {
|
|
subtype,
|
|
number_of_lines: nol(x.body),
|
|
},
|
|
},
|
|
extension: None,
|
|
})
|
|
}
|
|
AnyPart::Bin(x) => {
|
|
let basic = basic_fields(&x.mime.fields, x.body.len())?;
|
|
|
|
let default = mime::r#type::NaiveType { main: &b"application"[..], sub: &b"octet-stream"[..], params: vec![] };
|
|
let ct = x.mime.fields.ctype.as_ref().unwrap_or(&default);
|
|
|
|
let type_ = IString::try_from(String::from_utf8_lossy(ct.main).to_string())
|
|
.or(Err(anyhow!("Unable to build IString from given Content-Type type given")))?;
|
|
|
|
|
|
let subtype = IString::try_from(String::from_utf8_lossy(ct.sub).to_string())
|
|
.or(Err(anyhow!("Unable to build IString from given Content-Type subtype given")))?;
|
|
|
|
Ok(BodyStructure::Single {
|
|
body: FetchBody {
|
|
basic,
|
|
specific: SpecificFields::Basic { type_, subtype },
|
|
},
|
|
extension: None,
|
|
})
|
|
}
|
|
AnyPart::Msg(x) => {
|
|
let basic = basic_fields(&x.mime.fields, x.raw_part.len())?;
|
|
|
|
Ok(BodyStructure::Single {
|
|
body: FetchBody {
|
|
basic,
|
|
specific: SpecificFields::Message {
|
|
envelope: message_envelope(&x.imf),
|
|
body_structure: Box::new(build_imap_email_struct(x.child.as_ref())?),
|
|
number_of_lines: nol(x.raw_part),
|
|
},
|
|
},
|
|
extension: None,
|
|
})
|
|
}
|
|
}
|
|
}
|
|
|
|
fn nol(input: &[u8]) -> u32 {
|
|
input.iter()
|
|
.filter(|x| **x == b'\n')
|
|
.count()
|
|
.try_into()
|
|
.unwrap_or(0)
|
|
}
|
|
|
|
/// s is set to static to ensure that only compile time values
|
|
/// checked by developpers are passed.
|
|
fn unchecked_istring(s: &'static str) -> IString {
|
|
IString::try_from(s).expect("this value is expected to be a valid imap-codec::IString")
|
|
}
|
|
|
|
fn basic_fields(m: &mime::NaiveMIME, sz: usize) -> Result<BasicFields> {
|
|
let parameter_list = m.ctype
|
|
.as_ref()
|
|
.map(|x| x.params.iter()
|
|
.map(|p| (IString::try_from(String::from_utf8_lossy(p.name).to_string()), IString::try_from(p.value.to_string())))
|
|
.filter(|(k, v)| k.is_ok() && v.is_ok())
|
|
.map(|(k, v)| (k.unwrap(), v.unwrap()))
|
|
.collect())
|
|
.unwrap_or(vec![]);
|
|
|
|
Ok(BasicFields {
|
|
parameter_list,
|
|
id: NString(
|
|
m.id.as_ref()
|
|
.and_then(|ci| IString::try_from(ci.to_string()).ok()),
|
|
),
|
|
description: NString(
|
|
m.description.as_ref()
|
|
.and_then(|cd| IString::try_from(cd.to_string()).ok()),
|
|
),
|
|
content_transfer_encoding: match m.transfer_encoding {
|
|
mime::mechanism::Mechanism::_8Bit => unchecked_istring("8bit"),
|
|
mime::mechanism::Mechanism::Binary => unchecked_istring("binary"),
|
|
mime::mechanism::Mechanism::QuotedPrintable => unchecked_istring("quoted-printable"),
|
|
mime::mechanism::Mechanism::Base64 => unchecked_istring("base64"),
|
|
_ => unchecked_istring("7bit"),
|
|
},
|
|
// @FIXME we can't compute the size of the message currently...
|
|
size: u32::try_from(sz)?,
|
|
})
|
|
}
|
|
|
|
/// Extract message section for section identifier passed by the FETCH BODY[<section>]<<partial>>
|
|
/// request
|
|
///
|
|
/// Example of message sections:
|
|
///
|
|
/// ```
|
|
/// HEADER ([RFC-2822] header of the message)
|
|
/// TEXT ([RFC-2822] text body of the message) MULTIPART/MIXED
|
|
/// 1 TEXT/PLAIN
|
|
/// 2 APPLICATION/OCTET-STREAM
|
|
/// 3 MESSAGE/RFC822
|
|
/// 3.HEADER ([RFC-2822] header of the message)
|
|
/// 3.TEXT ([RFC-2822] text body of the message) MULTIPART/MIXED
|
|
/// 3.1 TEXT/PLAIN
|
|
/// 3.2 APPLICATION/OCTET-STREAM
|
|
/// 4 MULTIPART/MIXED
|
|
/// 4.1 IMAGE/GIF
|
|
/// 4.1.MIME ([MIME-IMB] header for the IMAGE/GIF)
|
|
/// 4.2 MESSAGE/RFC822
|
|
/// 4.2.HEADER ([RFC-2822] header of the message)
|
|
/// 4.2.TEXT ([RFC-2822] text body of the message) MULTIPART/MIXED
|
|
/// 4.2.1 TEXT/PLAIN
|
|
/// 4.2.2 MULTIPART/ALTERNATIVE
|
|
/// 4.2.2.1 TEXT/PLAIN
|
|
/// 4.2.2.2 TEXT/RICHTEXT
|
|
/// ```
|
|
fn get_message_section<'a>(
|
|
parsed: &'a Message<'a>,
|
|
section: &Option<FetchSection>,
|
|
) -> Result<Cow<'a, [u8]>> {
|
|
match section {
|
|
Some(FetchSection::Text(None)) => {
|
|
Ok(parsed.raw_body.into())
|
|
}
|
|
Some(FetchSection::Text(Some(part))) => {
|
|
map_subpart(parsed.child.as_ref(), part.0.as_slice(), |part_msg| {
|
|
Ok(part_msg.as_message().ok_or(Error::msg("Not a message/rfc822 part while expected by request (xxx.TEXT)"))?
|
|
.raw_body
|
|
.into())
|
|
})
|
|
}
|
|
Some(FetchSection::Header(part)) => map_subpart(
|
|
parsed.child.as_ref(),
|
|
part.as_ref().map(|p| p.0.as_slice()).unwrap_or(&[]),
|
|
|part_msg| {
|
|
Ok(part_msg.as_message().ok_or(Error::msg("Not a message/rfc822 part while expected by request (xxx.TEXT)"))?
|
|
.raw_headers
|
|
.into())
|
|
},
|
|
),
|
|
Some(
|
|
FetchSection::HeaderFields(part, fields) | FetchSection::HeaderFieldsNot(part, fields),
|
|
) => {
|
|
let invert = matches!(section, Some(FetchSection::HeaderFieldsNot(_, _)));
|
|
let fields = fields
|
|
.iter()
|
|
.map(|x| match x {
|
|
AString::Atom(a) => a.as_bytes(),
|
|
AString::String(IString::Literal(l)) => l.as_slice(),
|
|
AString::String(IString::Quoted(q)) => q.as_bytes(),
|
|
})
|
|
.collect::<Vec<_>>();
|
|
|
|
|
|
map_subpart(
|
|
parsed.child.as_ref(),
|
|
part.as_ref().map(|p| p.0.as_slice()).unwrap_or(&[]),
|
|
|part_msg| {
|
|
let mut ret = vec![];
|
|
for f in &part_msg.mime().kv {
|
|
let (k, v) = match f {
|
|
header::Field::Good(header::Kv2(k, v)) => (k, v),
|
|
_ => continue,
|
|
};
|
|
if fields
|
|
.as_slice()
|
|
.iter()
|
|
.any(|x| (x == k) ^ invert)
|
|
{
|
|
ret.extend(*k);
|
|
ret.extend(b": ");
|
|
ret.extend(*v);
|
|
ret.extend(b"\r\n");
|
|
}
|
|
}
|
|
ret.extend(b"\r\n");
|
|
Ok(ret.into())
|
|
},
|
|
)
|
|
}
|
|
Some(FetchSection::Part(part)) => map_subpart(parsed.child.as_ref(), part.0.as_slice(), |part| {
|
|
let bytes = match &part {
|
|
AnyPart::Txt(p) => p.body,
|
|
AnyPart::Bin(p) => p.body,
|
|
AnyPart::Msg(p) => p.raw_part,
|
|
AnyPart::Mult(_) => bail!("Multipart part has no body"),
|
|
};
|
|
Ok(bytes.to_vec().into())
|
|
}),
|
|
Some(FetchSection::Mime(part)) => map_subpart(parsed.child.as_ref(), part.0.as_slice(), |part| {
|
|
let bytes = match &part {
|
|
AnyPart::Txt(p) => p.mime.fields.raw,
|
|
AnyPart::Bin(p) => p.mime.fields.raw,
|
|
AnyPart::Msg(p) => p.mime.fields.raw,
|
|
AnyPart::Mult(p) => p.mime.fields.raw,
|
|
};
|
|
Ok(bytes.to_vec().into())
|
|
}),
|
|
None => Ok(parsed.raw_part.into()),
|
|
}
|
|
}
|
|
|
|
/// Fetch a MIME SubPart
|
|
///
|
|
/// eg. FETCH BODY[4.2.2.1] -> [4, 2, 2, 1]
|
|
fn map_subpart<'a, F, R>(part: &AnyPart<'a>, path: &[NonZeroU32], f: F) -> Result<R>
|
|
where
|
|
F: FnOnce(&AnyPart<'a>) -> Result<R>,
|
|
{
|
|
if path.is_empty() {
|
|
f(part)
|
|
} else {
|
|
match part {
|
|
AnyPart::Mult(x) => map_subpart(
|
|
x.children
|
|
.get(path[0].get() as usize - 1)
|
|
.ok_or(anyhow!("Unable to resolve subpath {:?}, current multipart has only {} elements", path, x.children.len()))?,
|
|
&path[1..],
|
|
f),
|
|
AnyPart::Msg(x) => map_subpart(x.child.as_ref(), path, f),
|
|
_ => bail!("You tried to access a subpart on an atomic part (text or binary). Unresolved subpath {:?}", path),
|
|
}
|
|
}
|
|
}
|
|
|
|
#[cfg(test)]
|
|
mod tests {
|
|
use super::*;
|
|
use imap_codec::codec::Encode;
|
|
use std::fs;
|
|
|
|
/// Future automated test. We use lossy utf8 conversion + lowercase everything,
|
|
/// so this test might allow invalid results. But at least it allows us to quickly test a
|
|
/// large variety of emails.
|
|
/// Keep in mind that special cases must still be tested manually!
|
|
#[test]
|
|
fn fetch_body() -> Result<()> {
|
|
let prefixes = [
|
|
/* *** MY OWN DATASET *** */
|
|
"tests/emails/dxflrs/0001_simple",
|
|
"tests/emails/dxflrs/0002_mime",
|
|
"tests/emails/dxflrs/0003_mime-in-mime",
|
|
"tests/emails/dxflrs/0004_msg-in-msg",
|
|
// eml_codec do not support continuation for the moment
|
|
//"tests/emails/dxflrs/0005_mail-parser-readme",
|
|
"tests/emails/dxflrs/0006_single-mime",
|
|
"tests/emails/dxflrs/0007_raw_msg_in_rfc822",
|
|
|
|
/* *** (STRANGE) RFC *** */
|
|
//"tests/emails/rfc/000", // must return text/enriched, we return text/plain
|
|
//"tests/emails/rfc/001", // does not recognize the multipart/external-body, breaks the
|
|
// whole parsing
|
|
//"tests/emails/rfc/002", // wrong date in email
|
|
|
|
//"tests/emails/rfc/003", // dovecot fixes \r\r: the bytes number is wrong + text/enriched
|
|
|
|
/* *** THIRD PARTY *** */
|
|
//"tests/emails/thirdparty/000", // dovecot fixes \r\r: the bytes number is wrong
|
|
//"tests/emails/thirdparty/001", // same
|
|
"tests/emails/thirdparty/002", // same
|
|
|
|
|
|
/* *** LEGACY *** */
|
|
//"tests/emails/legacy/000", // same issue with \r\r
|
|
];
|
|
|
|
for pref in prefixes.iter() {
|
|
println!("{}", pref);
|
|
let txt = fs::read(format!("{}.eml", pref))?;
|
|
let exp = fs::read(format!("{}.dovecot.body", pref))?;
|
|
let message = eml_codec::parse_message(&txt).unwrap().1;
|
|
|
|
let mut resp = Vec::new();
|
|
MessageAttribute::Body(build_imap_email_struct(&message.child)?).encode(&mut resp).unwrap();
|
|
|
|
let resp_str = String::from_utf8_lossy(&resp).to_lowercase();
|
|
|
|
let exp_no_parenthesis = &exp[1..exp.len() - 1];
|
|
let exp_str = String::from_utf8_lossy(exp_no_parenthesis).to_lowercase();
|
|
|
|
println!("aerogramme: {}\n\ndovecot: {}\n\n", resp_str, exp_str);
|
|
//println!("\n\n {} \n\n", String::from_utf8_lossy(&resp));
|
|
assert_eq!(resp_str, exp_str);
|
|
}
|
|
|
|
Ok(())
|
|
}
|
|
}
|