h2/codec/
error.rs

1use crate::proto::Error;
2
3use std::{error, fmt, io};
4
5/// Errors caused by sending a message
6#[derive(Debug)]
7pub enum SendError {
8    Connection(Error),
9    User(UserError),
10}
11
12/// Errors caused by users of the library
13#[derive(Debug)]
14pub enum UserError {
15    /// The stream ID is no longer accepting frames.
16    InactiveStreamId,
17
18    /// The stream is not currently expecting a frame of this type.
19    UnexpectedFrameType,
20
21    /// The payload size is too big
22    PayloadTooBig,
23
24    /// The application attempted to initiate too many streams to remote.
25    Rejected,
26
27    /// The released capacity is larger than claimed capacity.
28    ReleaseCapacityTooBig,
29
30    /// The stream ID space is overflowed.
31    ///
32    /// A new connection is needed.
33    OverflowedStreamId,
34
35    /// Illegal headers, such as connection-specific headers.
36    MalformedHeaders,
37
38    /// Request submitted with relative URI.
39    MissingUriSchemeAndAuthority,
40
41    /// Calls `SendResponse::poll_reset` after having called `send_response`.
42    PollResetAfterSendResponse,
43
44    /// Calls `PingPong::send_ping` before receiving a pong.
45    SendPingWhilePending,
46
47    /// Tries to update local SETTINGS while ACK has not been received.
48    SendSettingsWhilePending,
49
50    /// Tries to send push promise to peer who has disabled server push
51    PeerDisabledServerPush,
52
53    /// Invalid status code for informational response (must be 1xx)
54    InvalidInformationalStatusCode,
55}
56
57// ===== impl SendError =====
58
59impl error::Error for SendError {}
60
61impl fmt::Display for SendError {
62    fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
63        match *self {
64            Self::Connection(ref e) => e.fmt(fmt),
65            Self::User(ref e) => e.fmt(fmt),
66        }
67    }
68}
69
70impl From<io::Error> for SendError {
71    fn from(src: io::Error) -> Self {
72        Self::Connection(src.into())
73    }
74}
75
76impl From<UserError> for SendError {
77    fn from(src: UserError) -> Self {
78        SendError::User(src)
79    }
80}
81
82// ===== impl UserError =====
83
84impl error::Error for UserError {}
85
86impl fmt::Display for UserError {
87    fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
88        use self::UserError::*;
89
90        fmt.write_str(match *self {
91            InactiveStreamId => "inactive stream",
92            UnexpectedFrameType => "unexpected frame type",
93            PayloadTooBig => "payload too big",
94            Rejected => "rejected",
95            ReleaseCapacityTooBig => "release capacity too big",
96            OverflowedStreamId => "stream ID overflowed",
97            MalformedHeaders => "malformed headers",
98            MissingUriSchemeAndAuthority => "request URI missing scheme and authority",
99            PollResetAfterSendResponse => "poll_reset after send_response is illegal",
100            SendPingWhilePending => "send_ping before received previous pong",
101            SendSettingsWhilePending => "sending SETTINGS before received previous ACK",
102            PeerDisabledServerPush => "sending PUSH_PROMISE to peer who disabled server push",
103            InvalidInformationalStatusCode => "invalid informational status code",
104        })
105    }
106}
h2/codec/error.rs

h2/codec/
error.rs
