use std::convert::TryInto;
use err_derive::Error;
use hyper::header::HeaderValue;
use hyper::{HeaderMap, StatusCode};
use garage_model::helper::error::Error as HelperError;
use garage_util::error::Error as GarageError;
use crate::s3_xml;
/// Errors of this crate
#[derive(Debug, Error)]
pub enum Error {
// Category: internal error
/// Error related to deeper parts of Garage
#[error(display = "Internal error: {}", _0)]
InternalError(#[error(source)] GarageError),
/// Error related to Hyper
#[error(display = "Internal error (Hyper error): {}", _0)]
Hyper(#[error(source)] hyper::Error),
/// Error related to HTTP
#[error(display = "Internal error (HTTP error): {}", _0)]
Http(#[error(source)] http::Error),
// Category: cannot process
/// No proper api key was used, or the signature was invalid
#[error(display = "Forbidden: {}", _0)]
Forbidden(String),
/// Authorization Header Malformed
#[error(display = "Authorization header malformed, expected scope: {}", _0)]
AuthorizationHeaderMalformed(String),
/// The object requested don't exists
#[error(display = "Key not found")]
NoSuchKey,
/// The bucket requested don't exists
#[error(display = "Bucket not found")]
NoSuchBucket,
/// The multipart upload requested don't exists
#[error(display = "Upload not found")]
NoSuchUpload,
/// Tried to create a bucket that already exist
#[error(display = "Bucket already exists")]
BucketAlreadyExists,
/// Tried to delete a non-empty bucket
#[error(display = "Tried to delete a non-empty bucket")]
BucketNotEmpty,
/// Precondition failed (e.g. x-amz-copy-source-if-match)
#[error(display = "At least one of the preconditions you specified did not hold")]
PreconditionFailed,
/// Parts specified in CMU request do not match parts actually uploaded
#[error(display = "Parts given to CompleteMultipartUpload do not match uploaded parts")]
InvalidPart,
/// Parts given to CompleteMultipartUpload were not in ascending order
#[error(display = "Parts given to CompleteMultipartUpload were not in ascending order")]
InvalidPartOrder,
/// In CompleteMultipartUpload: not enough data
/// (here we are more lenient than AWS S3)
#[error(display = "Proposed upload is smaller than the minimum allowed object size")]
EntityTooSmall,
// Category: bad request
/// The request contained an invalid UTF-8 sequence in its path or in other parameters
#[error(display = "Invalid UTF-8: {}", _0)]
InvalidUtf8Str(#[error(source)] std::str::Utf8Error),
/// The request used an invalid path
#[error(display = "Invalid UTF-8: {}", _0)]
InvalidUtf8String(#[error(source)] std::string::FromUtf8Error),
/// Some base64 encoded data was badly encoded
#[error(display = "Invalid base64: {}", _0)]
InvalidBase64(#[error(source)] base64::DecodeError),
/// The client sent invalid XML data
#[error(display = "Invalid XML: {}", _0)]
InvalidXml(String),
/// The client sent a header with invalid value
#[error(display = "Invalid header value: {}", _0)]
InvalidHeader(#[error(source)] hyper::header::ToStrError),
/// The client sent a range header with invalid value
#[error(display = "Invalid HTTP range: {:?}", _0)]
InvalidRange(#[error(from)] (http_range::HttpRangeParseError, u64)),
/// The client sent an invalid request
#[error(display = "Bad request: {}", _0)]
BadRequest(String),
/// The client sent a request for an action not supported by garage
#[error(display = "Unimplemented action: {}", _0)]
NotImplemented(String),
}
impl From<roxmltree::Error> for Error {
fn from(err: roxmltree::Error) -> Self {
Self::InvalidXml(format!("{}", err))
}
}
impl From<quick_xml::de::DeError> for Error {
fn from(err: quick_xml::de::DeError) -> Self {
Self::InvalidXml(format!("{}", err))
}
}
impl From<HelperError> for Error {
fn from(err: HelperError) -> Self {
match err {
HelperError::Internal(i) => Self::InternalError(i),
HelperError::BadRequest(b) => Self::BadRequest(b),
}
}
}
impl Error {
/// Get the HTTP status code that best represents the meaning of the error for the client
pub fn http_status_code(&self) -> StatusCode {
match self {
Error::NoSuchKey | Error::NoSuchBucket | Error::NoSuchUpload => StatusCode::NOT_FOUND,
Error::BucketNotEmpty | Error::BucketAlreadyExists => StatusCode::CONFLICT,
Error::PreconditionFailed => StatusCode::PRECONDITION_FAILED,
Error::Forbidden(_) => StatusCode::FORBIDDEN,
Error::InternalError(
GarageError::Timeout
| GarageError::RemoteError(_)
| GarageError::Quorum(_, _, _, _),
) => StatusCode::SERVICE_UNAVAILABLE,
Error::InternalError(_) | Error::Hyper(_) | Error::Http(_) => {
StatusCode::INTERNAL_SERVER_ERROR
}
Error::InvalidRange(_) => StatusCode::RANGE_NOT_SATISFIABLE,
Error::NotImplemented(_) => StatusCode::NOT_IMPLEMENTED,
_ => StatusCode::BAD_REQUEST,
}
}
pub fn aws_code(&self) -> &'static str {
match self {
Error::NoSuchKey => "NoSuchKey",
Error::NoSuchBucket => "NoSuchBucket",
Error::NoSuchUpload => "NoSuchUpload",
Error::BucketAlreadyExists => "BucketAlreadyExists",
Error::BucketNotEmpty => "BucketNotEmpty",
Error::PreconditionFailed => "PreconditionFailed",
Error::InvalidPart => "InvalidPart",
Error::InvalidPartOrder => "InvalidPartOrder",
Error::EntityTooSmall => "EntityTooSmall",
Error::Forbidden(_) => "AccessDenied",
Error::AuthorizationHeaderMalformed(_) => "AuthorizationHeaderMalformed",
Error::NotImplemented(_) => "NotImplemented",
Error::InternalError(
GarageError::Timeout
| GarageError::RemoteError(_)
| GarageError::Quorum(_, _, _, _),
) => "ServiceUnavailable",
Error::InternalError(_) | Error::Hyper(_) | Error::Http(_) => "InternalError",
_ => "InvalidRequest",
}
}
pub fn aws_xml(&self, garage_region: &str, path: &str) -> String {
let error = s3_xml::Error {
code: s3_xml::Value(self.aws_code().to_string()),
message: s3_xml::Value(format!("{}", self)),
resource: Some(s3_xml::Value(path.to_string())),
region: Some(s3_xml::Value(garage_region.to_string())),
};
s3_xml::to_xml_with_header(&error).unwrap_or_else(|_| {
r#"
<?xml version="1.0" encoding="UTF-8"?>
<Error>
<Code>InternalError</Code>
<Message>XML encoding of error failed</Message>
</Error>
"#
.into()
})
}
pub fn add_headers(&self, header_map: &mut HeaderMap<HeaderValue>) {
use hyper::header;
#[allow(clippy::single_match)]
match self {
Error::InvalidRange((_, len)) => {
header_map.append(
header::CONTENT_RANGE,
format!("bytes */{}", len)
.try_into()
.expect("header value only contain ascii"),
);
}
_ => (),
}
}
}
/// Trait to map error to the Bad Request error code
pub trait OkOrBadRequest {
type S;
fn ok_or_bad_request<M: AsRef<str>>(self, reason: M) -> Result<Self::S, Error>;
}
impl<T, E> OkOrBadRequest for Result<T, E>
where
E: std::fmt::Display,
{
type S = T;
fn ok_or_bad_request<M: AsRef<str>>(self, reason: M) -> Result<T, Error> {
match self {
Ok(x) => Ok(x),
Err(e) => Err(Error::BadRequest(format!("{}: {}", reason.as_ref(), e))),
}
}
}
impl<T> OkOrBadRequest for Option<T> {
type S = T;
fn ok_or_bad_request<M: AsRef<str>>(self, reason: M) -> Result<T, Error> {
match self {
Some(x) => Ok(x),
None => Err(Error::BadRequest(reason.as_ref().to_string())),
}
}
}
/// Trait to map an error to an Internal Error code
pub trait OkOrInternalError {
type S;
fn ok_or_internal_error<M: AsRef<str>>(self, reason: M) -> Result<Self::S, Error>;
}
impl<T, E> OkOrInternalError for Result<T, E>
where
E: std::fmt::Display,
{
type S = T;
fn ok_or_internal_error<M: AsRef<str>>(self, reason: M) -> Result<T, Error> {
match self {
Ok(x) => Ok(x),
Err(e) => Err(Error::InternalError(GarageError::Message(format!(
"{}: {}",
reason.as_ref(),
e
)))),
}
}
}
impl<T> OkOrInternalError for Option<T> {
type S = T;
fn ok_or_internal_error<M: AsRef<str>>(self, reason: M) -> Result<T, Error> {
match self {
Some(x) => Ok(x),
None => Err(Error::InternalError(GarageError::Message(
reason.as_ref().to_string(),
))),
}
}
}
