httlib_hpack/encoder/
error.rs

1use std::fmt;
2use std::error;
3use httlib_huffman::{EncoderError as HuffmanError};
4
5/// Contains error options that can be encountered while performing the encoding
6/// of an HPACK header set.
7#[derive(Debug, PartialEq)]
8pub enum EncoderError {
9    /// Indicates that the encoder received an invalid ASCII character and is
10    /// thus unable to perform the (Huffman) encoding. Note that only ASCII
11    /// characters provided in the HPACK spec should be used.
12    InvalidInput,
13
14    /// Indicates that an invalid index was provided. According to the HPACK
15    /// specification, the index `0` must be treated as an invalid index number.
16    /// The first valid number is `1`.
17    InvalidIndex,
18
19    /// Indicates that an invalid prefix was provided (must be [1, 8]).
20    InvalidPrefix,
21
22    /// Indicates that the value of the integer being encoded exceeds a certain
23    /// threshold (5 bytes are chosen by this implementation). This can also
24    /// happen while encoding too long string.
25    IntegerOverflow,
26}
27
28impl From<HuffmanError> for EncoderError {
29    fn from(err: HuffmanError) -> Self {
30        match err {
31            HuffmanError::InvalidInput => Self::InvalidInput
32        }
33    }
34}
35
36impl fmt::Display for EncoderError {
37    fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
38        match self {
39            Self::InvalidInput => write!(fmt, "Invalid input character."),
40            Self::InvalidIndex => write!(fmt, "Invalid index."),
41            Self::InvalidPrefix => write!(fmt, "Invalid prefix."),
42            Self::IntegerOverflow => write!(fmt, "Too many bytes."),
43        }
44    }
45}
46
47impl error::Error for EncoderError {}
httlib_hpack/encoder/error.rs

httlib_hpack/encoder/
error.rs
