89 lines
2.8 KiB
Rust
89 lines
2.8 KiB
Rust
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use nom::{
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IResult,
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};
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use crate::rfc5322::address::{MailboxList, AddressList};
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use crate::rfc5322::mailbox::MailboxRef;
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use crate::rfc5322::identification::{MessageId, MessageIdList};
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use crate::rfc5322::trace::ReceivedLog;
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use crate::text::misc_token::{Unstructured, PhraseList};
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#[derive(Debug, PartialEq)]
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pub enum Field<'a> {
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// 3.6.1. The Origination Date Field
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Date(DateTime<'a>),
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// 3.6.2. Originator Fields
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From(MailboxList<'a>),
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Sender(Mailbox<'a>),
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ReplyTo(AddressList<'a>),
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// 3.6.3. Destination Address Fields
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To(AddressList<'a>),
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Cc(AddressList<'a>),
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Bcc(NullableAddressList<'a>),
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// 3.6.4. Identification Fields
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MessageID(Identifier<'a>),
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InReplyTo(IdentifierList<'a>),
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References(IdentifierList<'a>),
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// 3.6.5. Informational Fields
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Subject(Unstructured<'a>),
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Comments(Unstructured<'a>),
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Keywords(PhraseList<'a>),
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// 3.6.6 Resent Fields (not implemented)
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// 3.6.7 Trace Fields
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Received(ReceivedLog<'a>),
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ReturnPath(Option<AddrSpec<'a>>),
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MIMEVersion(Version<'a>),
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Optional(&'a [u8], Unstructured<'a>),
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}
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pub fn field(input: &[u8]) -> IResult<&[u8], Field<'a>> {
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let (name, rest) = field_name(input)?;
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match name.to_lowercase().as_ref() {
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"date" => datetime::section(rest).map(Field::Date),
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"from" => mailbox_list(rest).map(Field::From),
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"sender" => mailbox(rest).map(Field::Sender),
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"reply-to" => address_list(rest).map(Field::ReplyTo),
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"to" => address_list(rest).map(Field::To),
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"cc" => address_list(rest).map(Field::Cc),
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"bcc" => nullable_address_list(rest).map(Field::Bcc),
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"message-id" => msg_id(rest).map(Field::MessageID),
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"in-reply-to" => msg_list(rest).map(Field::InReplyTo),
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"references" => msg_list(rest).map(Field::References),
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"subject" => unstructured(rest).map(Field::Subject),
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"comments" => unstructured(rest).map(Field::Comments),
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"keywords" => phrase_list(rest).map(Field::Keywords),
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"return-path" => return_path(rest).map(Field::ReturnPath),
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"received" => received_log(rest).map(Field::ReceivedLog),
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"mime-version" => version(rest).map(Field::MIMEVersion),
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_ => unstructured(rest).map(|v| Field::Optional(name, v)),
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}
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}
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/// Optional field
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///
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/// ```abnf
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/// field = field-name ":" unstructured CRLF
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/// field-name = 1*ftext
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/// ftext = %d33-57 / ; Printable US-ASCII
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/// %d59-126 ; characters not including
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/// ; ":".
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/// ```
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fn field_name(input: &[u8]) -> IResult<&[u8], &[u8]> {
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terminated(
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take_while1(|c| c >= 0x21 && c <= 0x7E && c != 0x3A),
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tuple((space0, tag(b":"), space0)),
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)(input)
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}
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