aws-sdk-rust 0.1.42

Important Enhancements: 1) Supports V2 and V4 API Signatures for third party S3 compliant products like Ceph 2) Works from behind proxies 3) Returned data can be in Rust structs, JSON or XML Works only for S3. Other AWS Storage features are coming soon! 
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/*
 Copyright 2017 LambdaStack All rights reserved.

 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
 You may obtain a copy of the License at

 http://www.apache.org/licenses/LICENSE-2.0

 Unless required by applicable law or agreed to in writing, software
 distributed under the License is distributed on an "AS IS" BASIS,
 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.
*/

// Copyright (c) 2016 Chef Software Inc. and/or applicable contributors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

use std::error;
use std::io;
use std::fmt;
use std::result;

use hyper;
use openssl;
use url;

#[derive(Debug)]
pub enum Error {
    HyperError(hyper::error::Error),
    /// Occurs when an improper http or https proxy value is given.
    InvalidProxyValue(String),
    IO(io::Error),
    SslError(openssl::error::Error),
    /// When an error occurs attempting to parse a string into a URL.
    UrlParseError(url::ParseError),
}

pub type Result<T> = result::Result<T, Error>;

impl fmt::Display for Error {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        let msg = match *self {
            Error::HyperError(ref err) => format!("{}", err),
            Error::IO(ref e) => format!("{}", e),
            Error::InvalidProxyValue(ref e) => format!("Invalid proxy value: {:?}", e),
            Error::SslError(ref e) => format!("{}", e),
            Error::UrlParseError(ref e) => format!("{}", e),
        };
        write!(f, "{}", msg)
    }
}

impl error::Error for Error {
    fn description(&self) -> &str {
        match *self {
            Error::HyperError(ref err) => err.description(),
            Error::IO(ref err) => err.description(),
            Error::InvalidProxyValue(_) => "Invalid proxy value",
            Error::SslError(ref err) => err.description(),
            Error::UrlParseError(ref err) => err.description(),
        }
    }
}

impl From<hyper::error::Error> for Error {
    fn from(err: hyper::error::Error) -> Error {
        Error::HyperError(err)
    }
}

impl From<io::Error> for Error {
    fn from(err: io::Error) -> Error {
        Error::IO(err)
    }
}

impl From<openssl::error::Error> for Error {
    fn from(err: openssl::error::Error) -> Error {
        Error::SslError(err)
    }
}

impl From<url::ParseError> for Error {
    fn from(err: url::ParseError) -> Self {
        Error::UrlParseError(err)
    }
}