http-type 18.4.1

A comprehensive Rust type library for HTTP operations and concurrent programming. Provides core HTTP types (Request/Response with builder patterns, Method, HttpStatus, HttpVersion, ContentType, FileExtension with MIME mapping, Cookie parsing/building, HttpUrl parsing, WebSocket frame/opcode, protocol upgrade types, stream/task management, panic handling), thread-safe concurrent wrappers (ArcMutex, ArcRwLock, BoxRwLock, RcRwLock), dynamic dispatch types (BoxAny, RcAny, ArcAny with Send/Sync variants), high-performance hash collections (HashMapXxHash3_64, HashSetXxHash3_64), and static lifetime utilities (BoxLeak, Lifetime trait).
Documentation 
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use crate::*;

/// Represents the key for an attribute.
///
/// Attributes can be either external, defined by a user-provided string,
/// or internal, representing framework-specific functionality.
#[derive(Clone, CustomDebug, Deserialize, DisplayDebug, Eq, Hash, PartialEq, Serialize)]
pub enum Attribute {
    /// An external attribute identified by a string.
    External(String),
    /// An internal attribute with a predefined key.
    Internal(InternalAttribute),
}

/// Defines keys for internal attributes used by the framework.
///
/// These keys correspond to specific, built-in functionalities.
#[derive(Clone, Copy, CustomDebug, Deserialize, DisplayDebug, Eq, Hash, PartialEq, Serialize)]
pub enum InternalAttribute {
    /// The attribute key for task panic handling with detailed error information.
    TaskPanicData,
    /// The attribute key for request error handling.
    RequestErrorData,
}