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/*
* Minio Go Library for Amazon S3 Compatible Cloud Storage (C) 2015 Minio, Inc.
*
* 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.
*/
package minio
import (
"encoding/xml"
"fmt"
"net/http"
"strconv"
)
/* **** SAMPLE ERROR RESPONSE ****
<?xml version="1.0" encoding="UTF-8"?>
<Error>
<Code>AccessDenied</Code>
<Message>Access Denied</Message>
<BucketName>bucketName</BucketName>
<Key>objectName</Key>
<RequestId>F19772218238A85A</RequestId>
<HostId>GuWkjyviSiGHizehqpmsD1ndz5NClSP19DOT+s2mv7gXGQ8/X1lhbDGiIJEXpGFD</HostId>
</Error>
*/
// ErrorResponse - Is the typed error returned by all API operations.
type ErrorResponse struct {
XMLName xml.Name `xml:"Error" json:"-"`
Code string
Message string
BucketName string
Key string
RequestID string `xml:"RequestId"`
HostID string `xml:"HostId"`
// Region where the bucket is located. This header is returned
// only in HEAD bucket and ListObjects response.
Region string
}
// ToErrorResponse - Returns parsed ErrorResponse struct from body and
// http headers.
//
// For example:
//
// import s3 "github.com/minio/minio-go"
// ...
// ...
// reader, stat, err := s3.GetObject(...)
// if err != nil {
// resp := s3.ToErrorResponse(err)
// }
// ...
func ToErrorResponse(err error) ErrorResponse {
switch err := err.(type) {
case ErrorResponse:
return err
default:
return ErrorResponse{}
}
}
// Error - Returns HTTP error string
func (e ErrorResponse) Error() string {
return e.Message
}
// Common string for errors to report issue location in unexpected
// cases.
const (
reportIssue = "Please report this issue at https://github.com/minio/minio-go/issues."
)
// httpRespToErrorResponse returns a new encoded ErrorResponse
// structure as error.
func httpRespToErrorResponse(resp *http.Response, bucketName, objectName string) error {
if resp == nil {
msg := "Response is empty. " + reportIssue
return ErrInvalidArgument(msg)
}
var errResp ErrorResponse
err := xmlDecoder(resp.Body, &errResp)
// Xml decoding failed with no body, fall back to HTTP headers.
if err != nil {
switch resp.StatusCode {
case http.StatusNotFound:
if objectName == "" {
errResp = ErrorResponse{
Code: "NoSuchBucket",
Message: "The specified bucket does not exist.",
BucketName: bucketName,
RequestID: resp.Header.Get("x-amz-request-id"),
HostID: resp.Header.Get("x-amz-id-2"),
Region: resp.Header.Get("x-amz-bucket-region"),
}
} else {
errResp = ErrorResponse{
Code: "NoSuchKey",
Message: "The specified key does not exist.",
BucketName: bucketName,
Key: objectName,
RequestID: resp.Header.Get("x-amz-request-id"),
HostID: resp.Header.Get("x-amz-id-2"),
Region: resp.Header.Get("x-amz-bucket-region"),
}
}
case http.StatusForbidden:
errResp = ErrorResponse{
Code: "AccessDenied",
Message: "Access Denied.",
BucketName: bucketName,
Key: objectName,
RequestID: resp.Header.Get("x-amz-request-id"),
HostID: resp.Header.Get("x-amz-id-2"),
Region: resp.Header.Get("x-amz-bucket-region"),
}
case http.StatusConflict:
errResp = ErrorResponse{
Code: "Conflict",
Message: "Bucket not empty.",
BucketName: bucketName,
RequestID: resp.Header.Get("x-amz-request-id"),
HostID: resp.Header.Get("x-amz-id-2"),
Region: resp.Header.Get("x-amz-bucket-region"),
}
default:
errResp = ErrorResponse{
Code: resp.Status,
Message: resp.Status,
BucketName: bucketName,
RequestID: resp.Header.Get("x-amz-request-id"),
HostID: resp.Header.Get("x-amz-id-2"),
Region: resp.Header.Get("x-amz-bucket-region"),
}
}
}
return errResp
}
// ErrEntityTooLarge - Input size is larger than supported maximum.
func ErrEntityTooLarge(totalSize, maxObjectSize int64, bucketName, objectName string) error {
msg := fmt.Sprintf("Your proposed upload size ‘%d’ exceeds the maximum allowed object size ‘%d’ for single PUT operation.", totalSize, maxObjectSize)
return ErrorResponse{
Code: "EntityTooLarge",
Message: msg,
BucketName: bucketName,
Key: objectName,
}
}
// ErrEntityTooSmall - Input size is smaller than supported minimum.
func ErrEntityTooSmall(totalSize int64, bucketName, objectName string) error {
msg := fmt.Sprintf("Your proposed upload size ‘%d’ is below the minimum allowed object size '0B' for single PUT operation.", totalSize)
return ErrorResponse{
Code: "EntityTooLarge",
Message: msg,
BucketName: bucketName,
Key: objectName,
}
}
// ErrUnexpectedEOF - Unexpected end of file reached.
func ErrUnexpectedEOF(totalRead, totalSize int64, bucketName, objectName string) error {
msg := fmt.Sprintf("Data read ‘%s’ is not equal to the size ‘%s’ of the input Reader.",
strconv.FormatInt(totalRead, 10), strconv.FormatInt(totalSize, 10))
return ErrorResponse{
Code: "UnexpectedEOF",
Message: msg,
BucketName: bucketName,
Key: objectName,
}
}
// ErrInvalidBucketName - Invalid bucket name response.
func ErrInvalidBucketName(message string) error {
return ErrorResponse{
Code: "InvalidBucketName",
Message: message,
RequestID: "minio",
}
}
// ErrInvalidObjectName - Invalid object name response.
func ErrInvalidObjectName(message string) error {
return ErrorResponse{
Code: "NoSuchKey",
Message: message,
RequestID: "minio",
}
}
// ErrInvalidObjectPrefix - Invalid object prefix response is
// similar to object name response.
var ErrInvalidObjectPrefix = ErrInvalidObjectName
// ErrInvalidArgument - Invalid argument response.
func ErrInvalidArgument(message string) error {
return ErrorResponse{
Code: "InvalidArgument",
Message: message,
RequestID: "minio",
}
}
// ErrNoSuchBucketPolicy - No Such Bucket Policy response
// The specified bucket does not have a bucket policy.
func ErrNoSuchBucketPolicy(message string) error {
return ErrorResponse{
Code: "NoSuchBucketPolicy",
Message: message,
RequestID: "minio",
}
}
// ErrAPINotSupported - API not supported response
// The specified API call is not supported
func ErrAPINotSupported(message string) error {
return ErrorResponse{
Code: "APINotSupported",
Message: message,
RequestID: "minio",
}
}
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