parse date + fetch

Cargo.lock

@@ -768,6 +768,7 @@ dependencies = [
  "format-bytes",
  "log",
  "nom",
+ "num-traits",
 ]
 
 [[package]]

Justfile

@@ -7,6 +7,9 @@ fmt:
 doc:
     cargo doc --workspace --no-deps
 
+test:
+    cargo test --all
+
 watch:
     cargo watch -c
 

imap/src/client/codec.rs

@@ -65,7 +65,7 @@ impl<'a> Decoder for ImapCodec {
             Err(Err::Error(err)) | Err(Err::Failure(err)) => {
                 let buf4 = buf3.clone().into();
                 error!("failed to parse: {:?}", buf4);
-                error!("code: {}", convert_error(buf4, err));
+                error!("code: {}", convert_error(buf4, &err));
                 return Err(io::Error::new(
                     io::ErrorKind::Other,
                     format!("error during parsing of {:?}", buf),

imap/src/proto/mod.rs

@@ -13,7 +13,3 @@ pub mod rfc6154;
 
 #[cfg(feature = "rfc2177")]
 pub mod rfc2177;
-
-// tests
-#[cfg(test)]
-pub mod test_rfc3501;

imap/src/proto/response.rs

@@ -20,8 +20,8 @@ impl DisplayBytes for Tag {
     fn display_bytes(&self, w: &mut dyn Write) -> io::Result<()> { write_bytes!(w, b"{}", self.0) }
 }
 
-#[derive(Clone, Debug)]
-pub struct Timestamp(DateTime<FixedOffset>);
+#[derive(Clone, Debug, PartialEq, Eq, Hash)]
+pub struct Timestamp(pub(crate) DateTime<FixedOffset>);
 
 #[cfg(feature = "fuzzing")]
 impl<'a> Arbitrary<'a> for Timestamp {
@@ -145,7 +145,7 @@ pub struct Envelope {
     pub message_id: Option<Bytes>,
 }
 
-#[derive(Debug)]
+#[derive(Debug, PartialEq, Eq)]
 #[cfg_attr(feature = "fuzzing", derive(Arbitrary))]
 pub struct Address {
     pub name: Option<Bytes>,

imap/src/proto/rfc3501/mod.rs

@@ -3,21 +3,28 @@
 //!
 //! Grammar from <https://datatracker.ietf.org/doc/html/rfc3501#section-9>
 
+#[cfg(test)]
+pub mod tests;
+
+use chrono::{FixedOffset, NaiveTime, TimeZone};
 use nom::{
     branch::alt,
     combinator::{map, map_res, opt, verify},
-    multi::{many0, many1},
+    multi::{count, many0, many1, many_m_n},
     sequence::{delimited, pair, preceded, separated_pair, terminated, tuple},
 };
 use panorama_proto_common::{
-    byte, never, parse_u32, satisfy, tagi, take, take_while1, Bytes, VResult,
+    byte, never, parse_num, satisfy, tagi, take, take_while1, Bytes, VResult,
 };
 
 use super::response::{
     Address, Atom, Capability, Condition, Envelope, Flag, Mailbox, MailboxData, MailboxList,
     MailboxListFlag, MessageAttribute, Response, ResponseCode, ResponseText, Status, Tag,
+    Timestamp,
+};
+use super::rfc2234::{
+    is_char, is_cr, is_ctl, is_digit, is_dquote, is_lf, is_sp, CRLF, DIGIT, DQUOTE, SP,
 };
-use super::rfc2234::{is_char, is_cr, is_ctl, is_digit, is_dquote, is_lf, is_sp, CRLF, DQUOTE, SP};
 
 /// Grammar rule `T / nil` produces `Option<T>`
 macro_rules! opt_nil {
@@ -89,6 +96,54 @@ rule!(pub continue_req : Response => delimited(pair(byte(b'+'), SP),
     map(resp_text, Response::Continue),
 CRLF));
 
+rule!(pub date_day : u32 => map(many_m_n(1, 2, DIGIT), |s| match s.as_slice() {
+    &[x] => (x - b'0') as u32,
+    &[x, y] => (x - b'0') as u32 * 10 + (y - b'0') as u32,
+    _ => unreachable!("only up to two digits"),
+}));
+
+rule!(pub date_day_fixed : u32 => alt((
+    map(preceded(SP, DIGIT), |d| (d - b'0') as u32),
+    map(pair(DIGIT, DIGIT), |(x, y)| (x - b'0') as u32 * 10 + (y - b'0') as u32),
+)));
+
+rule!(pub date_month : u32 => alt((
+    map(tagi(b"Jan"), |_| 1),
+    map(tagi(b"Feb"), |_| 2),
+    map(tagi(b"Mar"), |_| 3),
+    map(tagi(b"Apr"), |_| 4),
+    map(tagi(b"May"), |_| 5),
+    map(tagi(b"Jun"), |_| 6),
+    map(tagi(b"Jul"), |_| 7),
+    map(tagi(b"Aug"), |_| 8),
+    map(tagi(b"Sep"), |_| 9),
+    map(tagi(b"Oct"), |_| 10),
+    map(tagi(b"Nov"), |_| 11),
+    map(tagi(b"Dec"), |_| 12),
+)));
+
+rule!(pub date_time : Timestamp => delimited(DQUOTE,
+    map_res(tuple((
+        date_day_fixed,
+        byte(b'-'),
+        date_month,
+        byte(b'-'),
+        date_year,
+        SP,
+        time,
+        SP,
+        zone,
+    )), |(d, _, m, _, y, _, time, _, zone)| {
+        eprintln!("{}-{}-{} {:?} {:?}", y, m, d, time, zone);
+        zone.ymd(y, m, d)
+            .and_time(time)
+            .map(Timestamp)
+            .ok_or_else(|| anyhow!("invalid time"))
+    }),
+DQUOTE));
+
+rule!(pub date_year : i32 => map_res(count(DIGIT, 4), parse_num::<_, i32>));
+
 rule!(pub envelope : Envelope => map(paren!(tuple((
     terminated(env_date, SP),
     terminated(env_subject, SP),
@@ -215,8 +270,10 @@ rule!(pub msg_att_dynamic : MessageAttribute => alt((
 )));
 
 rule!(pub msg_att_static : MessageAttribute => alt((
+    map(preceded(pair(tagi(b"UID"), SP), uniqueid), MessageAttribute::Uid),
     map(preceded(pair(tagi(b"ENVELOPE"), SP), envelope), MessageAttribute::Envelope),
-    map(preceded(pair(tagi(b"ENVELOPE"), SP), envelope), MessageAttribute::Envelope),
+    map(preceded(pair(tagi(b"INTERNALDATE"), SP), date_time), MessageAttribute::InternalDate),
+    map(preceded(pair(tagi(b"RFC822.SIZE"), SP), number), MessageAttribute::Rfc822Size),
 )));
 
 rule!(pub nil : Bytes => tagi(b"NIL"));
@@ -224,7 +281,7 @@ rule!(pub nil : Bytes => tagi(b"NIL"));
 rule!(pub nstring : Option<Bytes> => opt_nil!(string));
 
 pub(crate) fn number(i: Bytes) -> VResult<Bytes, u32> {
-    map_res(take_while1(is_digit), parse_u32)(i)
+    map_res(take_while1(is_digit), parse_num::<_, u32>)(i)
 }
 
 rule!(pub nz_number : u32 => verify(number, |n| *n != 0));
@@ -294,3 +351,20 @@ rule!(pub text : Bytes => map(take_while1(is_text_char), Bytes::from));
 
 pub(crate) fn is_text_char(c: u8) -> bool { is_char(c) && !is_cr(c) && !is_lf(c) }
 rule!(pub TEXT_CHAR : u8 => satisfy(is_text_char));
+
+rule!(pub time : NaiveTime => map(
+    tuple((
+        map_res(count(DIGIT, 2), parse_num::<_, u32>),
+        byte(b':'),
+        map_res(count(DIGIT, 2), parse_num::<_, u32>),
+        byte(b':'),
+        map_res(count(DIGIT, 2), parse_num::<_, u32>),
+    )),
+    |(h, _, m, _, s)| NaiveTime::from_hms(h, m, s)));
+
+rule!(pub uniqueid : u32 => nz_number);
+
+rule!(pub zone : FixedOffset => map(pair(
+    alt((map(byte(b'+'), |_| true), map(byte(b'-'), |_| false), )),
+    map_res(count(DIGIT, 4), parse_num::<_, i32>),
+), |(pos, value)| if pos { FixedOffset::east(value) } else { FixedOffset::west(value) }));

imap/src/proto/rfc3501/tests.rs

@@ -1,11 +1,12 @@
 #![allow(unused_imports)]
 
+use chrono::*;
 use nom::{multi::*, sequence::*};
 use panorama_proto_common::*;
 
-use super::response::*;
-use super::rfc2234::*;
-use super::rfc3501::*;
+use crate::proto::response::*;
+use crate::proto::rfc2234::*;
+use crate::proto::rfc3501::*;
 
 #[test]
 fn test_literal() {
@@ -22,23 +23,27 @@ fn test_literal() {
 fn afl() { let _ = response(Bytes::from(b"* 4544444444 444 ")); }
 
 #[test]
-fn test_date() {}
+fn test_date() {
+    assert_eq!(date_year(Bytes::from(b"2021")).unwrap().1, 2021);
+
+    assert_eq!(
+        date_time(Bytes::from(b"\"22-Mar-2021 01:44:12 +0000\""))
+            .unwrap()
+            .1,
+        Timestamp(FixedOffset::east(0).ymd(2021, 3, 22).and_hms(1, 44, 12)),
+    );
+}
 
 #[test]
 fn test_fetch() {
+    assert!(flag_list(Bytes::from(b"()")).unwrap().1.is_empty());
+
     use nom::Err;
     use panorama_proto_common::convert_error;
     let buf = Bytes::from(b"* 8045 FETCH (UID 8225 ENVELOPE (\"Sun, 21 Mar 2021 18:44:10 -0700\" \"SUBJECT\" ((\"SENDER\" NIL \"sender\" \"example.com\")) ((\"SENDER\" NIL \"sender\" \"example.com\")) ((\"noreply\" NIL \"noreply\" \"example.com\")) ((\"NAME\" NIL \"user\" \"gmail.com\")) NIL NIL NIL \"<HASH-99c91810@example.com>\") FLAGS () INTERNALDATE \"22-Mar-2021 01:44:12 +0000\" RFC822.SIZE 13503)\r\n".to_vec());
     let res = response(buf.clone());
-    let res = match res {
-        Ok((_, res)) => res,
-        Err(Err::Error(err)) | Err(Err::Failure(err)) => {
-            println!("code: {}", convert_error(buf, err));
-            panic!()
-        }
-        _ => panic!(),
-    };
-    assert!(matches!(res, Response::Expunge(2)));
+    println!("response: {:?}", res);
+    assert!(matches!(res.unwrap().1, Response::Fetch(8045, _)));
 }
 
 #[test]

proto-common/Cargo.toml

@@ -21,4 +21,5 @@ log = "0.4.14"
 nom = "6.2.1"
 
 # for fuzzing
-arbitrary = { version = "1", optional = true, features = ["derive"] }
+arbitrary = { version = "1", optional = true, features = ["derive"] }
+num-traits = "0.2.14"

proto-common/src/bytes.rs

@@ -4,7 +4,7 @@ use std::ops::{Deref, RangeBounds};
 use format_bytes::DisplayBytes;
 use nom::{
     error::{ErrorKind, ParseError},
-    CompareResult, Err, IResult, InputLength, Needed,
+    CompareResult, Err, HexDisplay, IResult, InputLength, Needed,
 };
 
 #[cfg(feature = "fuzzing")]
@@ -42,6 +42,50 @@ impl DisplayBytes for Bytes {
     fn display_bytes(&self, w: &mut dyn Write) -> io::Result<()> { w.write(&*self.0).map(|_| ()) }
 }
 
+static CHARS: &[u8] = b"0123456789abcdef";
+impl HexDisplay for Bytes {
+    fn to_hex(&self, chunk_size: usize) -> String { self.to_hex_from(chunk_size, 0) }
+
+    fn to_hex_from(&self, chunk_size: usize, from: usize) -> String {
+        let mut v = Vec::with_capacity(self.len() * 3);
+        let mut i = from;
+        for chunk in self.chunks(chunk_size) {
+            let s = format!("{:08x}", i);
+            for &ch in s.as_bytes().iter() {
+                v.push(ch);
+            }
+            v.push(b'\t');
+
+            i += chunk_size;
+
+            for &byte in chunk {
+                v.push(CHARS[(byte >> 4) as usize]);
+                v.push(CHARS[(byte & 0xf) as usize]);
+                v.push(b' ');
+            }
+            if chunk_size > chunk.len() {
+                for _ in 0..(chunk_size - chunk.len()) {
+                    v.push(b' ');
+                    v.push(b' ');
+                    v.push(b' ');
+                }
+            }
+            v.push(b'\t');
+
+            for &byte in chunk {
+                if (byte >= 32 && byte <= 126) || byte >= 128 {
+                    v.push(byte);
+                } else {
+                    v.push(b'.');
+                }
+            }
+            v.push(b'\n');
+        }
+
+        String::from_utf8_lossy(&v[..]).into_owned()
+    }
+}
+
 impl From<bytes::Bytes> for Bytes {
     fn from(b: bytes::Bytes) -> Self { Bytes(b) }
 }

proto-common/src/convert_error.rs

@@ -5,11 +5,33 @@ use std::ops::Deref;
 use bstr::ByteSlice;
 use nom::{
     error::{VerboseError, VerboseErrorKind},
-    Offset,
+    Err, HexDisplay, Offset,
 };
 
+use crate::VResult;
+
+/// Same as nom's dbg_dmp, except operates on Bytes
+pub fn dbg_dmp<'a, T, F, O>(mut f: F, context: &'static str) -> impl FnMut(T) -> VResult<T, O>
+where
+    F: FnMut(T) -> VResult<T, O>,
+    T: AsRef<[u8]> + HexDisplay + Clone + Debug + Deref<Target = [u8]>,
+{
+    move |i: T| match f(i.clone()) {
+        Err(Err::Failure(e)) => {
+            println!(
+                "{}: Error({}) at:\n{}",
+                context,
+                convert_error(i.clone(), &e),
+                i.to_hex(16)
+            );
+            Err(Err::Failure(e))
+        }
+        a => a,
+    }
+}
+
 /// Same as nom's convert_error, except operates on u8
-pub fn convert_error<I: Deref<Target = [u8]> + Debug>(input: I, e: VerboseError<I>) -> String {
+pub fn convert_error<I: Deref<Target = [u8]> + Debug>(input: I, e: &VerboseError<I>) -> String {
     let mut result = String::new();
     debug!("e: {:?}", e);
 

proto-common/src/lib.rs

@@ -10,6 +10,6 @@ mod parsers;
 mod rule;
 
 pub use crate::bytes::{Bytes, ShitCompare, ShitNeededForParsing};
-pub use crate::convert_error::convert_error;
+pub use crate::convert_error::{convert_error, dbg_dmp};
 pub use crate::formatter::quote_string;
-pub use crate::parsers::{byte, never, parse_u32, satisfy, skip, tagi, take, take_while1, VResult};
+pub use crate::parsers::{byte, never, parse_num, satisfy, skip, tagi, take, take_while1, VResult};

proto-common/src/parsers.rs

@@ -3,6 +3,7 @@ use nom::{
     error::{ErrorKind, ParseError, VerboseError},
     CompareResult, Err, IResult, InputLength, Needed, Parser, ToUsize,
 };
+use num_traits::{CheckedAdd, CheckedMul, FromPrimitive, Zero};
 
 use super::bytes::{ShitCompare, ShitNeededForParsing};
 
@@ -71,23 +72,50 @@ macro_rules! paren {
 }
 
 /// Parse from a [u8] into a u32 without first decoding it to UTF-8.
-pub fn parse_u32(s: impl AsRef<[u8]>) -> Result<u32> {
-    let mut total = 0u32;
+pub fn parse_num<S, T>(s: S) -> Result<T>
+where
+    S: AsRef<[u8]>,
+    T: CheckedMul + Zero + CheckedAdd + FromPrimitive,
+{
+    let mut total = T::zero();
+    let ten = T::from_u8(10).unwrap();
     let s = s.as_ref();
     for digit in s.iter() {
         let digit = *digit;
-        total = match total.checked_mul(10) {
+        total = match total.checked_mul(&ten) {
             Some(v) => v,
-            None => bail!("number {:?} overflows u32", s),
+            None => bail!("number {:?} overflow", s),
         };
         if !(digit >= b'0' && digit <= b'9') {
             bail!("invalid digit {}", digit)
         }
-        total += (digit - b'\x30') as u32;
+        let new_digit = T::from_u8(digit - b'\x30').unwrap();
+        total = match total.checked_add(&new_digit) {
+            Some(v) => v,
+            None => bail!("number {:?} overflow", s),
+        };
     }
     Ok(total)
 }
 
+// /// Parse from a [u8] into a u32 without first decoding it to UTF-8.
+// pub fn parse_u32(s: impl AsRef<[u8]>) -> Result<u32> {
+//     let mut total = 0u32;
+//     let s = s.as_ref();
+//     for digit in s.iter() {
+//         let digit = *digit;
+//         total = match total.checked_mul(10) {
+//             Some(v) => v,
+//             None => bail!("number {:?} overflows u32", s),
+//         };
+//         if !(digit >= b'0' && digit <= b'9') {
+//             bail!("invalid digit {}", digit)
+//         }
+//         total += (digit - b'\x30') as u32;
+//     }
+//     Ok(total)
+// }
+
 /// Always fails, used as a no-op.
 pub fn never<I, O, E>(i: I) -> IResult<I, O, E>
 where
@@ -167,7 +195,10 @@ where
 {
     move |i: I| match i.first().map(|t| (f(t), t)) {
         Some((true, ft)) => Ok((i.slice(1..), ft)),
-        Some((false, _)) => Err(Err::Error(E::from_error_kind(i, ErrorKind::Satisfy))),
+        Some((false, _)) => Err(Err::Error(E::from_error_kind(
+            i.slice(1..),
+            ErrorKind::Satisfy,
+        ))),
         None => Err(Err::Incomplete(Needed::Unknown)),
     }
 }

proto-common/src/rule.rs

@@ -9,7 +9,7 @@ macro_rules! rule {
         $vis fn $name (
             i: panorama_proto_common::Bytes
         ) -> panorama_proto_common::VResult<panorama_proto_common::Bytes, $ret> {
-            $expr(i)
+            panorama_proto_common::dbg_dmp($expr, stringify!($name))(i)
         }
     };
 }