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//! Error types used in by `arti-rpcserver`].
use tor_rpcbase::RpcError;
/// An error encountered while parsing an RPC request,
/// that we will report to the client.
///
/// Note that this does not include fatal parsing errors
/// that result in closing the connection entirely.
#[derive(Clone, Debug, thiserror::Error, serde::Serialize)]
pub enum RequestParseError {
/// The `id` field was missing.
#[error("Request did not have any `id` field.")]
IdMissing,
/// The `id` field did not have the expected type (integer or string).
#[error("Request's `id` field was not an integer or a string.")]
IdType,
/// The `obj` field was missing.
#[error("Request did not have any `obj` field.")]
ObjMissing,
/// The `method` field did not have the expected type (string).
#[error("Request's `obj` field was not a string.")]
ObjType,
/// The `method` field was missing.
#[error("Request had no `method` field.")]
MethodMissing,
/// The `method` field did not have the expected type (string).
#[error("Request's `method` field was not a string.")]
MethodType,
/// The `meta` field was present, but it could not be parsed.
///
/// Maybe it was not a json object; maybe it had a field of the wrong type.
#[error("Request's `meta` field was not valid.")]
MetaType,
/// The `method` field was not the name of any recognized method.
#[error("Request's `method` field was unrecognized")]
NoSuchMethod,
/// The parameters were of the wrong type for the method.
#[error("Parameter types incorrect for specified method")]
ParamType,
/// The `params` field was missing.
#[error("Request's `params` field was missing.")]
MissingParams,
}
impl From<RequestParseError> for RpcError {
fn from(err: RequestParseError) -> Self {
use RequestParseError as E;
use tor_rpcbase::RpcErrorKind as EK;
let kind = match err {
E::IdMissing
| E::IdType
| E::ObjMissing
| E::ObjType
| E::MethodMissing
| E::MethodType
| E::MetaType
| E::MissingParams => EK::InvalidRequest,
E::NoSuchMethod => EK::NoSuchMethod,
E::ParamType => EK::InvalidMethodParameters,
};
RpcError::new(err.to_string(), kind)
}
}
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