async_h1b/
error.rs

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use std::str::Utf8Error;

use http_types::url;
use thiserror::Error;

/// Concrete errors that occur within async-h1
#[derive(Error, Debug)]
#[non_exhaustive]
pub enum Error {
    /// [`std::io::Error`]
    #[error(transparent)]
    IO(#[from] std::io::Error),

    /// [`url::ParseError`]
    #[error(transparent)]
    Url(#[from] url::ParseError),

    /// this error describes a malformed request with a path that does
    /// not start with / or http:// or https://
    #[error("unexpected uri format")]
    UnexpectedURIFormat,

    /// this error describes a http 1.1 request that is missing a Host
    /// header
    #[error("mandatory host header missing")]
    HostHeaderMissing,

    /// this error describes a request that does not specify a path
    #[error("request path missing")]
    RequestPathMissing,

    /// [`httparse::Error`]
    #[error(transparent)]
    Httparse(#[from] httparse::Error),

    /// [`http_types::Error`]
    //#[error(transparent)]
    #[error("error type from http_types::Error")]
    HttpTypes(/*#[from] */http_types::Error),

    /// an incomplete http head
    #[error("partial http head")]
    PartialHead,

    /// we were unable to parse a header
    #[error("malformed http header {0}")]
    MalformedHeader(&'static str),

    /// async-h1 doesn't speak this http version
    /// this error is deprecated
    #[error("unsupported http version 1.{0}")]
    UnsupportedVersion(u8),

    /// we were unable to parse this http method
    #[error("unsupported http method {0}")]
    UnrecognizedMethod(String),

    /// this request did not have a method
    #[error("missing method")]
    MissingMethod,

    /// this request did not have a status code
    #[error("missing status code")]
    MissingStatusCode,

    /// we were unable to parse this http method
    #[error("unrecognized http status code {0}")]
    UnrecognizedStatusCode(u16),

    /// this request did not have a version, but we expect one
    /// this error is deprecated
    #[error("missing version")]
    MissingVersion,

    /// we expected utf8, but there was an encoding error
    #[error(transparent)]
    EncodingError(#[from] Utf8Error),

    /// we received a header that does not make sense in context
    #[error("unexpected header: {0}")]
    UnexpectedHeader(&'static str),

    /// for security reasons, we do not allow request headers beyond 8kb.
    #[error("Head byte length should be less than 8kb")]
    HeadersTooLong,
}
impl From<http_types::Error> for Error {
    fn from(val: http_types::Error) -> Self {
        Self::HttpTypes(val)
    }
}

/// this crate's result type
pub type Result<T> = std::result::Result<T, Error>;