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decoder.go
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decoder.go
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package mq
import (
"bytes"
"encoding/xml"
"io"
"github.com/gogap/errors"
)
// Decoder .
type Decoder interface {
Decode(reader io.Reader, v interface{}) (err error)
DecodeError(bodyBytes []byte, resource string, requestID string) (decodedError error, err error)
}
// AliYunMQDecoder .
type AliYunMQDecoder struct {
}
// AliYunMQAckMsgDecoder .
type AliYunMQAckMsgDecoder struct {
v AckMessageErrorResponse
}
// NewAliYunMQDecoder .
func NewAliYunMQDecoder() Decoder {
return &AliYunMQDecoder{}
}
// Decode .
func (p *AliYunMQDecoder) Decode(reader io.Reader, v interface{}) (err error) {
decoder := xml.NewDecoder(reader)
err = decoder.Decode(&v)
return
}
// DecodeError .
func (p *AliYunMQDecoder) DecodeError(bodyBytes []byte, resource string, requestID string) (decodedError error, err error) {
bodyReader := bytes.NewReader(bodyBytes)
errResp := ErrorResponse{}
decoder := xml.NewDecoder(bodyReader)
err = decoder.Decode(&errResp)
if err == nil {
decodedError = ParseError(errResp, resource)
}
return
}
// NewAliYunMQAckMsgDecoder .
func NewAliYunMQAckMsgDecoder() Decoder {
return &AliYunMQAckMsgDecoder{}
}
// Decode .
func (p *AliYunMQAckMsgDecoder) Decode(reader io.Reader, v interface{}) (err error) {
decoder := xml.NewDecoder(reader)
err = decoder.Decode(&v)
if err == io.EOF {
err = nil
}
return
}
// DecodeError .
func (p *AliYunMQAckMsgDecoder) DecodeError(bodyBytes []byte, resource string, requestID string) (decodedError error, err error) {
bodyReader := bytes.NewReader(bodyBytes)
decoder := xml.NewDecoder(bodyReader)
err = decoder.Decode(&p.v)
if err != nil {
// not receipt handle error
bodyReader.Seek(0, 0)
errResp := ErrorResponse{}
err = decoder.Decode(&errResp)
if err == nil {
decodedError = ParseError(errResp, resource)
}
} else {
var errorItems []ErrAckItem
for _, v := range p.v.FailedMessages {
errorItems = append(errorItems, ErrAckItem{
ErrorCode: v.ErrorCode,
ErrorHandle: v.ReceiptHandle,
ErrorMsg: v.ErrorMessage,
})
}
decodedError = ErrAckMessage.New(errors.Params{
"Code": p.v.FailedMessages[0].ErrorCode,
"Message": p.v.FailedMessages[0].ErrorMessage,
"ReceiptHandle": p.v.FailedMessages[0].ReceiptHandle,
"RequestID": requestID,
}).WithContext("Detail", errorItems)
}
return
}