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