Enum ModernPostRejection 

pub enum ModernPostRejection {
    EndpointMismatch,
    MethodNotAllowed,
    TooManyHeaders {
        limit: usize,
    },
    HeaderBlockTooLarge {
        limit: usize,
    },
    DuplicateSingletonHeader {
        name: &'static str,
    },
    UnsupportedMediaType,
    UnsupportedContentCoding,
    NotAcceptable,
    Raw(RawJsonAdmissionError),
    InvalidEnvelope,
    NotARequest,
    FinalAdmission(RequestAdmissionError),
}

Typed, side-effect-free rejections in deterministic precedence order.

Variants

EndpointMismatch

The request targeted a different path than the one configured MCP endpoint. The route’s fixed empty-body rejection applies.

MethodNotAllowed

The request used a method other than byte-exact POST.

TooManyHeaders

The request exceeded the header-count ceiling.

Fields

limit: usize

The configured header-count ceiling.

HeaderBlockTooLarge

The request exceeded the total header-byte ceiling.

Fields

limit: usize

The configured header-block ceiling in bytes.

DuplicateSingletonHeader

A singleton request field appeared more than once.

Fields

name: &'static str

The lowercase singleton field name.

UnsupportedMediaType

The request media type is not application/json (with at most one charset=utf-8 parameter).

UnsupportedContentCoding

The request content coding is neither absent nor singleton identity.

NotAcceptable

Neither JSON nor SSE is acceptable to the request’s Accept fields.

Raw(RawJsonAdmissionError)

Bounded raw JSON-RPC admission refused the body before parsing, including every top-level array.

InvalidEnvelope

The admitted raw document is not a strict JSON-RPC envelope.

NotARequest

The strict envelope is a response or notification, which this request-admission boundary does not accept.

FinalAdmission(RequestAdmissionError)

Final protocol-version or header/body mirror admission refused the request.

Trait Implementations

impl Clone for ModernPostRejection

fn clone(&self) -> ModernPostRejection

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ModernPostRejection

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for ModernPostRejection

fn fmt(&self, formatter: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for ModernPostRejection

impl Error for ModernPostRejection

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl PartialEq for ModernPostRejection

fn eq(&self, other: &ModernPostRejection) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for ModernPostRejection