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package oss
import (
"encoding/xml"
"fmt"
"net/http"
"strings"
)
// ServiceError contains fields of the error response from Oss Service REST API.
type ServiceError struct {
XMLName xml.Name `xml:"Error"`
Code string `xml:"Code"` // OSS返回给用户的错误码
Message string `xml:"Message"` // OSS给出的详细错误信息
RequestID string `xml:"RequestId"` // 用于唯一标识该次请求的UUID
HostID string `xml:"HostId"` // 用于标识访问的OSS集群
RawMessage string // OSS返回的原始消息内容
StatusCode int // HTTP状态码
}
// Implement interface error
func (e ServiceError) Error() string {
return fmt.Sprintf("oss: service returned error: StatusCode=%d, ErrorCode=%s, ErrorMessage=%s, RequestId=%s",
e.StatusCode, e.Code, e.Message, e.RequestID)
}
// UnexpectedStatusCodeError is returned when a storage service responds with neither an error
// nor with an HTTP status code indicating success.
type UnexpectedStatusCodeError struct {
allowed []int // 预期OSS返回HTTP状态码
got int // OSS实际返回HTTP状态码
}
// Implement interface error
func (e UnexpectedStatusCodeError) Error() string {
s := func(i int) string { return fmt.Sprintf("%d %s", i, http.StatusText(i)) }
got := s(e.got)
expected := []string{}
for _, v := range e.allowed {
expected = append(expected, s(v))
}
return fmt.Sprintf("oss: status code from service response is %s; was expecting %s",
got, strings.Join(expected, " or "))
}
// Got is the actual status code returned by oss.
func (e UnexpectedStatusCodeError) Got() int {
return e.got
}
// checkRespCode returns UnexpectedStatusError if the given response code is not
// one of the allowed status codes; otherwise nil.
func checkRespCode(respCode int, allowed []int) error {
for _, v := range allowed {
if respCode == v {
return nil
}
}
return UnexpectedStatusCodeError{allowed, respCode}
}
// CRCCheckError is returned when crc check is inconsistent between client and server
type CRCCheckError struct {
clientCRC uint64 // 客户端计算的CRC64值
serverCRC uint64 // 服务端计算的CRC64值
operation string // 上传操作，如PutObject/AppendObject/UploadPart等
requestID string // 本次操作的RequestID
}
// Implement interface error
func (e CRCCheckError) Error() string {
return fmt.Sprintf("oss: the crc of %s is inconsistent, client %d but server %d; request id is %s",
e.operation, e.clientCRC, e.serverCRC, e.requestID)
}
func checkCRC(resp *Response, operation string) error {
if resp.Headers.Get(HTTPHeaderOssCRC64) == "" || resp.ClientCRC == resp.ServerCRC {
return nil
}
return CRCCheckError{resp.ClientCRC, resp.ServerCRC, operation, resp.Headers.Get(HTTPHeaderOssRequestID)}
}
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