1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104

use bytes::BytesMut;
use http::{HeaderMap, Method};

use crate::body::DecodedLength;
use crate::proto::{BodyLength, MessageHead};

pub(crate) use self::conn::Conn;
pub(crate) use self::decode::Decoder;
pub(crate) use self::dispatch::Dispatcher;
pub(crate) use self::encode::{EncodedBuf, Encoder};
 //TODO: move out of h1::io
pub(crate) use self::io::MINIMUM_MAX_BUFFER_SIZE;

mod conn;
mod decode;
pub(crate) mod dispatch;
mod encode;
mod io;
mod role;


cfg_client! {
    pub(crate) type ClientTransaction = role::Client;
}

cfg_server! {
    pub(crate) type ServerTransaction = role::Server;
}

pub(crate) trait Http1Transaction {
    type Incoming;
    type Outgoing: Default;
    const LOG: &'static str;
    fn parse(bytes: &mut BytesMut, ctx: ParseContext<'_>) -> ParseResult<Self::Incoming>;
    fn encode(enc: Encode<'_, Self::Outgoing>, dst: &mut Vec<u8>) -> crate::Result<Encoder>;

    fn on_error(err: &crate::Error) -> Option<MessageHead<Self::Outgoing>>;

    fn is_client() -> bool {
        !Self::is_server()
    }

    fn is_server() -> bool {
        !Self::is_client()
    }

    fn should_error_on_parse_eof() -> bool {
        Self::is_client()
    }

    fn should_read_first() -> bool {
        Self::is_server()
    }

    fn update_date() {}
}

/// Result newtype for Http1Transaction::parse.
pub(crate) type ParseResult<T> = Result<Option<ParsedMessage<T>>, crate::error::Parse>;

#[derive(Debug)]
pub(crate) struct ParsedMessage<T> {
    head: MessageHead<T>,
    decode: DecodedLength,
    expect_continue: bool,
    keep_alive: bool,
    wants_upgrade: bool,
}

pub(crate) struct ParseContext<'a> {
    cached_headers: &'a mut Option<HeaderMap>,
    req_method: &'a mut Option<Method>,
    #[cfg(feature = "ffi")]
    preserve_header_case: bool,
}

/// Passed to Http1Transaction::encode
pub(crate) struct Encode<'a, T> {
    head: &'a mut MessageHead<T>,
    body: Option<BodyLength>,
    #[cfg(feature = "server")]
    keep_alive: bool,
    req_method: &'a mut Option<Method>,
    title_case_headers: bool,
}

/// Extra flags that a request "wants", like expect-continue or upgrades.
#[derive(Clone, Copy, Debug)]
struct Wants(u8);

impl Wants {
    const EMPTY: Wants = Wants(0b00);
    const EXPECT: Wants = Wants(0b01);
    const UPGRADE: Wants = Wants(0b10);

    #[must_use]
    fn add(self, other: Wants) -> Wants {
        Wants(self.0 | other.0)
    }

    fn contains(&self, other: Wants) -> bool {
        (self.0 & other.0) == other.0
    }
}