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629 lines
22 KiB
Rust
629 lines
22 KiB
Rust
/// Represents a generic id type
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pub type Id = String;
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mod request;
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mod response;
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pub use request::*;
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pub use response::*;
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#[derive(Clone, Debug, PartialEq, Eq)]
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enum MsgPackStrParseError {
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InvalidFormat,
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Utf8Error(std::str::Utf8Error),
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}
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/// Writes the given str to the end of `buf` as the str's msgpack representation.
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///
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/// # Panics
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///
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/// Panics if `s.len() >= 2 ^ 32` as the maximum str length for a msgpack str is `(2 ^ 32) - 1`.
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fn write_str_msg_pack(s: &str, buf: &mut Vec<u8>) {
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assert!(
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s.len() < 2usize.pow(32),
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"str cannot be longer than (2^32)-1 bytes"
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);
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if s.len() < 32 {
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buf.push(s.len() as u8 | 0b10100000);
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} else if s.len() < 2usize.pow(8) {
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buf.push(0xd9);
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buf.push(s.len() as u8);
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} else if s.len() < 2usize.pow(16) {
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buf.push(0xda);
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for b in (s.len() as u16).to_be_bytes() {
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buf.push(b);
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}
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} else {
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buf.push(0xdb);
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for b in (s.len() as u32).to_be_bytes() {
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buf.push(b);
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}
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}
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buf.extend_from_slice(s.as_bytes());
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}
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/// Parse msgpack str, returning remaining bytes and str on success, or error on failure.
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fn parse_msg_pack_str(input: &[u8]) -> Result<(&[u8], &str), MsgPackStrParseError> {
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let ilen = input.len();
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if ilen == 0 {
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return Err(MsgPackStrParseError::InvalidFormat);
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}
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// * fixstr using 0xa0 - 0xbf to mark the start of the str where < 32 bytes
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// * str 8 (0xd9) if up to (2^8)-1 bytes, using next byte for len
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// * str 16 (0xda) if up to (2^16)-1 bytes, using next two bytes for len
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// * str 32 (0xdb) if up to (2^32)-1 bytes, using next four bytes for len
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let (input, len): (&[u8], usize) = if input[0] >= 0xa0 && input[0] <= 0xbf {
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(&input[1..], (input[0] & 0b00011111).into())
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} else if input[0] == 0xd9 && ilen > 2 {
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(&input[2..], input[1].into())
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} else if input[0] == 0xda && ilen > 3 {
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(&input[3..], u16::from_be_bytes([input[1], input[2]]).into())
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} else if input[0] == 0xdb && ilen > 5 {
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(
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&input[5..],
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u32::from_be_bytes([input[1], input[2], input[3], input[4]])
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.try_into()
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.unwrap(),
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)
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} else {
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return Err(MsgPackStrParseError::InvalidFormat);
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};
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let s = match std::str::from_utf8(&input[..len]) {
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Ok(s) => s,
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Err(x) => return Err(MsgPackStrParseError::Utf8Error(x)),
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};
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Ok((&input[len..], s))
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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mod write_str_msg_pack {
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use super::*;
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#[test]
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fn should_support_fixstr() {
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// 0-byte str
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let mut buf = Vec::new();
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write_str_msg_pack("", &mut buf);
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assert_eq!(buf, &[0xa0]);
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// 1-byte str
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let mut buf = Vec::new();
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write_str_msg_pack("a", &mut buf);
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assert_eq!(buf, &[0xa1, b'a']);
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// 2-byte str
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let mut buf = Vec::new();
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write_str_msg_pack("ab", &mut buf);
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assert_eq!(buf, &[0xa2, b'a', b'b']);
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// 3-byte str
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let mut buf = Vec::new();
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write_str_msg_pack("abc", &mut buf);
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assert_eq!(buf, &[0xa3, b'a', b'b', b'c']);
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// 4-byte str
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let mut buf = Vec::new();
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write_str_msg_pack("abcd", &mut buf);
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assert_eq!(buf, &[0xa4, b'a', b'b', b'c', b'd']);
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// 5-byte str
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let mut buf = Vec::new();
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write_str_msg_pack("abcde", &mut buf);
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assert_eq!(buf, &[0xa5, b'a', b'b', b'c', b'd', b'e']);
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// 6-byte str
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let mut buf = Vec::new();
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write_str_msg_pack("abcdef", &mut buf);
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assert_eq!(buf, &[0xa6, b'a', b'b', b'c', b'd', b'e', b'f']);
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// 7-byte str
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let mut buf = Vec::new();
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write_str_msg_pack("abcdefg", &mut buf);
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assert_eq!(buf, &[0xa7, b'a', b'b', b'c', b'd', b'e', b'f', b'g']);
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// 8-byte str
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let mut buf = Vec::new();
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write_str_msg_pack("abcdefgh", &mut buf);
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assert_eq!(buf, &[0xa8, b'a', b'b', b'c', b'd', b'e', b'f', b'g', b'h']);
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// 9-byte str
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let mut buf = Vec::new();
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write_str_msg_pack("abcdefghi", &mut buf);
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assert_eq!(
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buf,
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&[0xa9, b'a', b'b', b'c', b'd', b'e', b'f', b'g', b'h', b'i']
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);
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// 10-byte str
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let mut buf = Vec::new();
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write_str_msg_pack("abcdefghij", &mut buf);
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assert_eq!(
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buf,
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&[0xaa, b'a', b'b', b'c', b'd', b'e', b'f', b'g', b'h', b'i', b'j']
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);
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// 11-byte str
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let mut buf = Vec::new();
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write_str_msg_pack("abcdefghijk", &mut buf);
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assert_eq!(
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buf,
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&[0xab, b'a', b'b', b'c', b'd', b'e', b'f', b'g', b'h', b'i', b'j', b'k']
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);
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// 12-byte str
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let mut buf = Vec::new();
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write_str_msg_pack("abcdefghijkl", &mut buf);
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assert_eq!(
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buf,
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&[0xac, b'a', b'b', b'c', b'd', b'e', b'f', b'g', b'h', b'i', b'j', b'k', b'l']
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);
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// 13-byte str
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let mut buf = Vec::new();
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write_str_msg_pack("abcdefghijklm", &mut buf);
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assert_eq!(
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buf,
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&[
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0xad, b'a', b'b', b'c', b'd', b'e', b'f', b'g', b'h', b'i', b'j', b'k', b'l',
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b'm'
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]
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);
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// 14-byte str
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let mut buf = Vec::new();
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write_str_msg_pack("abcdefghijklmn", &mut buf);
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assert_eq!(
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buf,
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&[
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0xae, b'a', b'b', b'c', b'd', b'e', b'f', b'g', b'h', b'i', b'j', b'k', b'l',
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b'm', b'n'
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]
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);
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// 15-byte str
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let mut buf = Vec::new();
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write_str_msg_pack("abcdefghijklmno", &mut buf);
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assert_eq!(
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buf,
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&[
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0xaf, b'a', b'b', b'c', b'd', b'e', b'f', b'g', b'h', b'i', b'j', b'k', b'l',
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b'm', b'n', b'o'
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]
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);
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// 16-byte str
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let mut buf = Vec::new();
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write_str_msg_pack("abcdefghijklmnop", &mut buf);
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assert_eq!(
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buf,
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&[
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0xb0, b'a', b'b', b'c', b'd', b'e', b'f', b'g', b'h', b'i', b'j', b'k', b'l',
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b'm', b'n', b'o', b'p'
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]
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);
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// 17-byte str
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let mut buf = Vec::new();
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write_str_msg_pack("abcdefghijklmnopq", &mut buf);
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assert_eq!(
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buf,
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&[
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0xb1, b'a', b'b', b'c', b'd', b'e', b'f', b'g', b'h', b'i', b'j', b'k', b'l',
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b'm', b'n', b'o', b'p', b'q'
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]
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);
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// 18-byte str
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let mut buf = Vec::new();
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write_str_msg_pack("abcdefghijklmnopqr", &mut buf);
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assert_eq!(
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buf,
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&[
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0xb2, b'a', b'b', b'c', b'd', b'e', b'f', b'g', b'h', b'i', b'j', b'k', b'l',
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b'm', b'n', b'o', b'p', b'q', b'r'
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]
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);
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// 19-byte str
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let mut buf = Vec::new();
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write_str_msg_pack("abcdefghijklmnopqrs", &mut buf);
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assert_eq!(
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buf,
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&[
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0xb3, b'a', b'b', b'c', b'd', b'e', b'f', b'g', b'h', b'i', b'j', b'k', b'l',
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b'm', b'n', b'o', b'p', b'q', b'r', b's'
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]
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);
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// 20-byte str
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let mut buf = Vec::new();
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write_str_msg_pack("abcdefghijklmnopqrst", &mut buf);
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assert_eq!(
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buf,
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&[
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0xb4, b'a', b'b', b'c', b'd', b'e', b'f', b'g', b'h', b'i', b'j', b'k', b'l',
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b'm', b'n', b'o', b'p', b'q', b'r', b's', b't'
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]
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);
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// 21-byte str
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let mut buf = Vec::new();
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write_str_msg_pack("abcdefghijklmnopqrstu", &mut buf);
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assert_eq!(
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buf,
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&[
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0xb5, b'a', b'b', b'c', b'd', b'e', b'f', b'g', b'h', b'i', b'j', b'k', b'l',
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b'm', b'n', b'o', b'p', b'q', b'r', b's', b't', b'u'
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]
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);
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// 22-byte str
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let mut buf = Vec::new();
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write_str_msg_pack("abcdefghijklmnopqrstuv", &mut buf);
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assert_eq!(
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buf,
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&[
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0xb6, b'a', b'b', b'c', b'd', b'e', b'f', b'g', b'h', b'i', b'j', b'k', b'l',
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b'm', b'n', b'o', b'p', b'q', b'r', b's', b't', b'u', b'v'
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]
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);
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// 23-byte str
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let mut buf = Vec::new();
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write_str_msg_pack("abcdefghijklmnopqrstuvw", &mut buf);
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assert_eq!(
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buf,
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&[
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0xb7, b'a', b'b', b'c', b'd', b'e', b'f', b'g', b'h', b'i', b'j', b'k', b'l',
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b'm', b'n', b'o', b'p', b'q', b'r', b's', b't', b'u', b'v', b'w'
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]
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);
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// 24-byte str
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let mut buf = Vec::new();
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write_str_msg_pack("abcdefghijklmnopqrstuvwx", &mut buf);
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assert_eq!(
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buf,
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&[
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0xb8, b'a', b'b', b'c', b'd', b'e', b'f', b'g', b'h', b'i', b'j', b'k', b'l',
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b'm', b'n', b'o', b'p', b'q', b'r', b's', b't', b'u', b'v', b'w', b'x'
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]
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);
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// 25-byte str
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let mut buf = Vec::new();
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write_str_msg_pack("abcdefghijklmnopqrstuvwxy", &mut buf);
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assert_eq!(
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buf,
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&[
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0xb9, b'a', b'b', b'c', b'd', b'e', b'f', b'g', b'h', b'i', b'j', b'k', b'l',
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b'm', b'n', b'o', b'p', b'q', b'r', b's', b't', b'u', b'v', b'w', b'x', b'y'
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]
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);
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// 26-byte str
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let mut buf = Vec::new();
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write_str_msg_pack("abcdefghijklmnopqrstuvwxyz", &mut buf);
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assert_eq!(
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buf,
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&[
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0xba, b'a', b'b', b'c', b'd', b'e', b'f', b'g', b'h', b'i', b'j', b'k', b'l',
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b'm', b'n', b'o', b'p', b'q', b'r', b's', b't', b'u', b'v', b'w', b'x', b'y',
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b'z'
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]
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);
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// 27-byte str
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let mut buf = Vec::new();
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write_str_msg_pack("abcdefghijklmnopqrstuvwxyz0", &mut buf);
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assert_eq!(
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buf,
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&[
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0xbb, b'a', b'b', b'c', b'd', b'e', b'f', b'g', b'h', b'i', b'j', b'k', b'l',
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b'm', b'n', b'o', b'p', b'q', b'r', b's', b't', b'u', b'v', b'w', b'x', b'y',
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b'z', b'0'
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]
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);
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// 28-byte str
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let mut buf = Vec::new();
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write_str_msg_pack("abcdefghijklmnopqrstuvwxyz01", &mut buf);
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assert_eq!(
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buf,
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&[
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0xbc, b'a', b'b', b'c', b'd', b'e', b'f', b'g', b'h', b'i', b'j', b'k', b'l',
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b'm', b'n', b'o', b'p', b'q', b'r', b's', b't', b'u', b'v', b'w', b'x', b'y',
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b'z', b'0', b'1'
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]
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);
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// 29-byte str
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let mut buf = Vec::new();
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write_str_msg_pack("abcdefghijklmnopqrstuvwxyz012", &mut buf);
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assert_eq!(
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buf,
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&[
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0xbd, b'a', b'b', b'c', b'd', b'e', b'f', b'g', b'h', b'i', b'j', b'k', b'l',
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b'm', b'n', b'o', b'p', b'q', b'r', b's', b't', b'u', b'v', b'w', b'x', b'y',
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b'z', b'0', b'1', b'2'
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]
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);
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|
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// 30-byte str
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let mut buf = Vec::new();
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write_str_msg_pack("abcdefghijklmnopqrstuvwxyz0123", &mut buf);
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assert_eq!(
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buf,
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&[
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0xbe, b'a', b'b', b'c', b'd', b'e', b'f', b'g', b'h', b'i', b'j', b'k', b'l',
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b'm', b'n', b'o', b'p', b'q', b'r', b's', b't', b'u', b'v', b'w', b'x', b'y',
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b'z', b'0', b'1', b'2', b'3'
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]
|
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);
|
|
|
|
// 31-byte str is maximum len of fixstr
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let mut buf = Vec::new();
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write_str_msg_pack("abcdefghijklmnopqrstuvwxyz01234", &mut buf);
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assert_eq!(
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buf,
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|
&[
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0xbf, b'a', b'b', b'c', b'd', b'e', b'f', b'g', b'h', b'i', b'j', b'k', b'l',
|
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b'm', b'n', b'o', b'p', b'q', b'r', b's', b't', b'u', b'v', b'w', b'x', b'y',
|
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b'z', b'0', b'1', b'2', b'3', b'4'
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|
]
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn should_support_str_8() {
|
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let input = "a".repeat(32);
|
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let mut buf = Vec::new();
|
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write_str_msg_pack(&input, &mut buf);
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assert_eq!(buf[0], 0xd9);
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assert_eq!(buf[1], input.len() as u8);
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assert_eq!(&buf[2..], input.as_bytes());
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|
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let input = "a".repeat(2usize.pow(8) - 1);
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let mut buf = Vec::new();
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write_str_msg_pack(&input, &mut buf);
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assert_eq!(buf[0], 0xd9);
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assert_eq!(buf[1], input.len() as u8);
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assert_eq!(&buf[2..], input.as_bytes());
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}
|
|
|
|
#[test]
|
|
fn should_support_str_16() {
|
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let input = "a".repeat(2usize.pow(8));
|
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let mut buf = Vec::new();
|
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write_str_msg_pack(&input, &mut buf);
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assert_eq!(buf[0], 0xda);
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assert_eq!(&buf[1..3], &(input.len() as u16).to_be_bytes());
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assert_eq!(&buf[3..], input.as_bytes());
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|
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let input = "a".repeat(2usize.pow(16) - 1);
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let mut buf = Vec::new();
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write_str_msg_pack(&input, &mut buf);
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assert_eq!(buf[0], 0xda);
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assert_eq!(&buf[1..3], &(input.len() as u16).to_be_bytes());
|
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assert_eq!(&buf[3..], input.as_bytes());
|
|
}
|
|
|
|
#[test]
|
|
fn should_support_str_32() {
|
|
let input = "a".repeat(2usize.pow(16));
|
|
let mut buf = Vec::new();
|
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write_str_msg_pack(&input, &mut buf);
|
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assert_eq!(buf[0], 0xdb);
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assert_eq!(&buf[1..5], &(input.len() as u32).to_be_bytes());
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assert_eq!(&buf[5..], input.as_bytes());
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}
|
|
}
|
|
|
|
mod parse_msg_pack_str {
|
|
use super::*;
|
|
|
|
#[test]
|
|
fn should_be_able_to_parse_fixstr() {
|
|
// Empty str
|
|
let (input, s) = parse_msg_pack_str(&[0xa0]).unwrap();
|
|
assert!(input.is_empty());
|
|
assert_eq!(s, "");
|
|
|
|
// Single character
|
|
let (input, s) = parse_msg_pack_str(&[0xa1, b'a']).unwrap();
|
|
assert!(input.is_empty());
|
|
assert_eq!(s, "a");
|
|
|
|
// 31 byte str
|
|
let (input, s) = parse_msg_pack_str(&[
|
|
0xbf, b'a', b'a', b'a', b'a', b'a', b'a', b'a', b'a', b'a', b'a', b'a', b'a', b'a',
|
|
b'a', b'a', b'a', b'a', b'a', b'a', b'a', b'a', b'a', b'a', b'a', b'a', b'a', b'a',
|
|
b'a', b'a', b'a', b'a',
|
|
])
|
|
.unwrap();
|
|
assert!(input.is_empty());
|
|
assert_eq!(s, "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa");
|
|
|
|
// Verify that we only consume up to fixstr length
|
|
assert_eq!(parse_msg_pack_str(&[0xa0, b'a']).unwrap().0, b"a");
|
|
assert_eq!(
|
|
parse_msg_pack_str(&[
|
|
0xbf, b'a', b'a', b'a', b'a', b'a', b'a', b'a', b'a', b'a', b'a', b'a', b'a',
|
|
b'a', b'a', b'a', b'a', b'a', b'a', b'a', b'a', b'a', b'a', b'a', b'a', b'a',
|
|
b'a', b'a', b'a', b'a', b'a', b'a', b'b'
|
|
])
|
|
.unwrap()
|
|
.0,
|
|
b"b"
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn should_be_able_to_parse_str_8() {
|
|
// 32 byte str
|
|
let (input, s) = parse_msg_pack_str(&[
|
|
0xd9, 32, b'a', b'a', b'a', b'a', b'a', b'a', b'a', b'a', b'a', b'a', b'a', b'a',
|
|
b'a', b'a', b'a', b'a', b'a', b'a', b'a', b'a', b'a', b'a', b'a', b'a', b'a', b'a',
|
|
b'a', b'a', b'a', b'a', b'a', b'a',
|
|
])
|
|
.unwrap();
|
|
assert!(input.is_empty());
|
|
assert_eq!(s, "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa");
|
|
|
|
// 2^8 - 1 (255) byte str
|
|
let test_str = "a".repeat(2usize.pow(8) - 1);
|
|
let mut input = vec![0xd9, 255];
|
|
input.extend_from_slice(test_str.as_bytes());
|
|
let (input, s) = parse_msg_pack_str(&input).unwrap();
|
|
assert!(input.is_empty());
|
|
assert_eq!(s, test_str);
|
|
|
|
// Verify that we only consume up to 2^8 - 1 length
|
|
let mut input = vec![0xd9, 255];
|
|
input.extend_from_slice(test_str.as_bytes());
|
|
input.extend_from_slice(b"hello");
|
|
let (input, s) = parse_msg_pack_str(&input).unwrap();
|
|
assert_eq!(input, b"hello");
|
|
assert_eq!(s, test_str);
|
|
}
|
|
|
|
#[test]
|
|
fn should_be_able_to_parse_str_16() {
|
|
// 2^8 byte str (256)
|
|
let test_str = "a".repeat(2usize.pow(8));
|
|
let mut input = vec![0xda, 1, 0];
|
|
input.extend_from_slice(test_str.as_bytes());
|
|
let (input, s) = parse_msg_pack_str(&input).unwrap();
|
|
assert!(input.is_empty());
|
|
assert_eq!(s, test_str);
|
|
|
|
// 2^16 - 1 (65535) byte str
|
|
let test_str = "a".repeat(2usize.pow(16) - 1);
|
|
let mut input = vec![0xda, 255, 255];
|
|
input.extend_from_slice(test_str.as_bytes());
|
|
let (input, s) = parse_msg_pack_str(&input).unwrap();
|
|
assert!(input.is_empty());
|
|
assert_eq!(s, test_str);
|
|
|
|
// Verify that we only consume up to 2^16 - 1 length
|
|
let mut input = vec![0xda, 255, 255];
|
|
input.extend_from_slice(test_str.as_bytes());
|
|
input.extend_from_slice(b"hello");
|
|
let (input, s) = parse_msg_pack_str(&input).unwrap();
|
|
assert_eq!(input, b"hello");
|
|
assert_eq!(s, test_str);
|
|
}
|
|
|
|
#[test]
|
|
fn should_be_able_to_parse_str_32() {
|
|
// 2^16 byte str
|
|
let test_str = "a".repeat(2usize.pow(16));
|
|
let mut input = vec![0xdb, 0, 1, 0, 0];
|
|
input.extend_from_slice(test_str.as_bytes());
|
|
let (input, s) = parse_msg_pack_str(&input).unwrap();
|
|
assert!(input.is_empty());
|
|
assert_eq!(s, test_str);
|
|
|
|
// NOTE: We are not going to run the below tests, not because they aren't valid but
|
|
// because this generates a 4GB str which takes 20+ seconds to run
|
|
|
|
// 2^32 - 1 byte str (4294967295 bytes)
|
|
/* let test_str = "a".repeat(2usize.pow(32) - 1);
|
|
let mut input = vec![0xdb, 255, 255, 255, 255];
|
|
input.extend_from_slice(test_str.as_bytes());
|
|
let (input, s) = parse_msg_pack_str(&input).unwrap();
|
|
assert!(input.is_empty());
|
|
assert_eq!(s, test_str); */
|
|
|
|
// Verify that we only consume up to 2^32 - 1 length
|
|
/* let mut input = vec![0xdb, 255, 255, 255, 255];
|
|
input.extend_from_slice(test_str.as_bytes());
|
|
input.extend_from_slice(b"hello");
|
|
let (input, s) = parse_msg_pack_str(&input).unwrap();
|
|
assert_eq!(input, b"hello");
|
|
assert_eq!(s, test_str); */
|
|
}
|
|
|
|
#[test]
|
|
fn should_fail_parsing_str_with_invalid_length() {
|
|
// Make sure that parse doesn't fail looking for bytes after str 8 len
|
|
assert_eq!(
|
|
parse_msg_pack_str(&[0xd9]),
|
|
Err(MsgPackStrParseError::InvalidFormat)
|
|
);
|
|
assert_eq!(
|
|
parse_msg_pack_str(&[0xd9, 0]),
|
|
Err(MsgPackStrParseError::InvalidFormat)
|
|
);
|
|
|
|
// Make sure that parse doesn't fail looking for bytes after str 16 len
|
|
assert_eq!(
|
|
parse_msg_pack_str(&[0xda]),
|
|
Err(MsgPackStrParseError::InvalidFormat)
|
|
);
|
|
assert_eq!(
|
|
parse_msg_pack_str(&[0xda, 0]),
|
|
Err(MsgPackStrParseError::InvalidFormat)
|
|
);
|
|
assert_eq!(
|
|
parse_msg_pack_str(&[0xda, 0, 0]),
|
|
Err(MsgPackStrParseError::InvalidFormat)
|
|
);
|
|
|
|
// Make sure that parse doesn't fail looking for bytes after str 32 len
|
|
assert_eq!(
|
|
parse_msg_pack_str(&[0xdb]),
|
|
Err(MsgPackStrParseError::InvalidFormat)
|
|
);
|
|
assert_eq!(
|
|
parse_msg_pack_str(&[0xdb, 0]),
|
|
Err(MsgPackStrParseError::InvalidFormat)
|
|
);
|
|
assert_eq!(
|
|
parse_msg_pack_str(&[0xdb, 0, 0]),
|
|
Err(MsgPackStrParseError::InvalidFormat)
|
|
);
|
|
assert_eq!(
|
|
parse_msg_pack_str(&[0xdb, 0, 0, 0]),
|
|
Err(MsgPackStrParseError::InvalidFormat)
|
|
);
|
|
assert_eq!(
|
|
parse_msg_pack_str(&[0xdb, 0, 0, 0, 0]),
|
|
Err(MsgPackStrParseError::InvalidFormat)
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn should_fail_parsing_other_types() {
|
|
assert_eq!(
|
|
parse_msg_pack_str(&[0xc3]), // Boolean (true)
|
|
Err(MsgPackStrParseError::InvalidFormat)
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn should_fail_if_empty_input() {
|
|
assert_eq!(
|
|
parse_msg_pack_str(&[]),
|
|
Err(MsgPackStrParseError::InvalidFormat)
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn should_fail_if_str_is_not_utf8() {
|
|
assert!(matches!(
|
|
parse_msg_pack_str(&[0xa4, 0, 159, 146, 150]),
|
|
Err(MsgPackStrParseError::Utf8Error(_))
|
|
));
|
|
}
|
|
}
|
|
}
|