62 lines
2.6 KiB
Rust
62 lines
2.6 KiB
Rust
use http::StatusCode;
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use thiserror::Error;
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/// HTTP result type, T is typically a hyper::Response
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/// HttpError is used to generate a synthetic error response
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pub(crate) type HttpResult<T> = std::result::Result<T, HttpError>;
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/// Describes things that can go wrong in the forwarder
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#[derive(Debug, Error)]
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pub enum HttpError {
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// #[error("No host is give in request header")]
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// NoHostInRequestHeader,
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#[error("Invalid host in request header")]
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InvalidHostInRequestHeader,
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#[error("SNI and Host header mismatch")]
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SniHostInconsistency,
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#[error("No matching backend app")]
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NoMatchingBackendApp,
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#[error("Failed to redirect: {0}")]
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FailedToRedirect(String),
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#[error("No upstream candidates")]
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NoUpstreamCandidates,
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#[error("Failed to generate upstream request for backend application: {0}")]
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FailedToGenerateUpstreamRequest(String),
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#[error("Failed to get response from backend: {0}")]
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FailedToGetResponseFromBackend(String),
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#[error("Failed to add set-cookie header in response {0}")]
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FailedToAddSetCookeInResponse(String),
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#[error("Failed to generated downstream response for clients: {0}")]
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FailedToGenerateDownstreamResponse(String),
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#[error("Failed to upgrade connection: {0}")]
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FailedToUpgrade(String),
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// #[error("Request does not have an upgrade extension")]
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// NoUpgradeExtensionInRequest,
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// #[error("Response does not have an upgrade extension")]
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// NoUpgradeExtensionInResponse,
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#[error(transparent)]
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Other(#[from] anyhow::Error),
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}
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impl From<HttpError> for StatusCode {
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fn from(e: HttpError) -> StatusCode {
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match e {
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// HttpError::NoHostInRequestHeader => StatusCode::BAD_REQUEST,
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HttpError::InvalidHostInRequestHeader => StatusCode::BAD_REQUEST,
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HttpError::SniHostInconsistency => StatusCode::MISDIRECTED_REQUEST,
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HttpError::NoMatchingBackendApp => StatusCode::SERVICE_UNAVAILABLE,
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HttpError::FailedToRedirect(_) => StatusCode::INTERNAL_SERVER_ERROR,
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HttpError::NoUpstreamCandidates => StatusCode::NOT_FOUND,
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HttpError::FailedToGenerateUpstreamRequest(_) => StatusCode::INTERNAL_SERVER_ERROR,
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HttpError::FailedToAddSetCookeInResponse(_) => StatusCode::INTERNAL_SERVER_ERROR,
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HttpError::FailedToGenerateDownstreamResponse(_) => StatusCode::INTERNAL_SERVER_ERROR,
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HttpError::FailedToUpgrade(_) => StatusCode::INTERNAL_SERVER_ERROR,
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HttpError::FailedToGetResponseFromBackend(_) => StatusCode::BAD_GATEWAY,
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// HttpError::NoUpgradeExtensionInRequest => StatusCode::BAD_REQUEST,
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// HttpError::NoUpgradeExtensionInResponse => StatusCode::BAD_GATEWAY,
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_ => StatusCode::INTERNAL_SERVER_ERROR,
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}
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}
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}
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