implement date parsing

This commit is contained in:
Quentin 2023-06-12 11:54:15 +02:00
parent 4ea0c97cfe
commit 7d3b3ff053
Signed by: quentin
GPG key ID: E9602264D639FF68
5 changed files with 366 additions and 10 deletions

314
Cargo.lock generated
View file

@ -2,13 +2,118 @@
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@ -30,3 +135,212 @@ dependencies = [
"memchr",
"minimal-lexical",
]
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View file

@ -17,3 +17,4 @@ path = "src/parse.rs"
[dependencies]
nom = "7"
chrono = "0.4"

View file

@ -1,3 +1,4 @@
use chrono::DateTime;
use nom::{
IResult,
bytes::complete::take_while1,
@ -11,7 +12,7 @@ use nom::{
};
use crate::abnf::{fws, vchar_seq, perm_crlf};
use crate::model::HeaderSection;
use crate::model::{HeaderSection, HeaderDate};
/// HEADERS
@ -24,6 +25,11 @@ pub fn header_section(input: &str) -> IResult<&str, HeaderSection> {
HeaderSection::default,
|mut section, head| {
match head {
HeaderField::Date(d) => {
//@FIXME only one date is allowed, what are we doing if multiple dates are
//encountered? Currently, we override...
section.date = d;
}
HeaderField::Subject(title) => {
section.subject = Some(title);
}
@ -42,7 +48,7 @@ pub fn header_section(input: &str) -> IResult<&str, HeaderSection> {
enum HeaderField<'a> {
// 3.6.1. The Origination Date Field
Date,
Date(HeaderDate),
// 3.6.2. Originator Fields
From,
@ -97,21 +103,31 @@ fn header_field(input: &str) -> IResult<&str, HeaderField> {
let (input, _) = tuple((tag(":"), space0))(input)?;
// Extract field body
match field_name {
"Date" => unimplemented!(),
let (input, hfield) = match field_name {
"Date" => {
// @FIXME want to extract datetime our way in the future
// to better handle obsolete/bad cases instead of crashing.
let (input, raw_date) = unstructured(input)?;
let date = match DateTime::parse_from_rfc2822(&raw_date) {
Ok(chronodt) => HeaderDate::Parsed(chronodt),
Err(e) => HeaderDate::Unknown(raw_date, e),
};
(input, HeaderField::Date(date))
},
//"From" => unimplemented!(),
"Sender" => unimplemented!(),
"Subject" => {
let (input, body) = unstructured(input)?;
let (input, _) = crlf(input)?;
Ok((input, HeaderField::Subject(body)))
(input, HeaderField::Subject(body))
},
_ => {
let (input, body) = unstructured(input)?;
let (input, _) = crlf(input)?;
Ok((input, HeaderField::Optional(field_name, body)))
(input, HeaderField::Optional(field_name, body))
}
}
};
let (input, _) = crlf(input)?;
return Ok((input, hfield));
}
/// Unstructured header field body

View file

@ -1,8 +1,33 @@
use std::collections::HashMap;
use chrono::{DateTime,FixedOffset,ParseError};
#[derive(Debug, Default)]
pub enum HeaderDate {
Parsed(DateTime<FixedOffset>),
Unknown(String, ParseError),
#[default]
None,
}
#[derive(Debug, Default)]
pub struct HeaderSection<'a> {
pub subject: Option<String>,
pub from: Vec<String>,
pub date: HeaderDate,
pub optional: HashMap<&'a str, String>,
}
enum InvalidEmailErr {
NoUsableDate,
}
impl<'a> HeaderSection<'a> {
fn is_valid(&self) -> Result<(), InvalidEmailErr> {
match self.date {
HeaderDate::Parsed(_) => (),
_ => return Err(InvalidEmailErr::NoUsableDate),
};
Ok(())
}
}

View file

@ -1,6 +1,6 @@
use imf_codec::headers;
fn main() {
let header = "Subject: Hello\r\n World\r\nFrom: <quentin@deuxfleurs.fr>\r\n\r\nHello world";
let header = "Date: Fri, 21 Nov 1997 09:55:06 -0600\r\nSubject: Hello\r\n World\r\nFrom: <quentin@deuxfleurs.fr>\r\n\r\nHello world";
println!("{:?}", headers::header_section(header));
}