func (this *fdfsClient) downloadToBufferByOffset(fileId string, offset int64, downloadSize int64, catInstance cat.Cat) ([]byte, error) {
//split file id to two parts: group name and file name
tmp, err := splitRemoteFileId(fileId)
if err != nil || len(tmp) != 2 {
return nil, err
}
groupName := tmp[0]
fileName := tmp[1]
//query a download server from tracker
storeInfo, err := this.tracker.trackerQueryStorageFetch(groupName, fileName)
if err != nil {
return nil, err
}
if catInstance != nil {
event := catInstance.NewEvent("ImgFromStorage", fmt.Sprintf("%s:%s", storeInfo.groupName, storeInfo.ipAddr))
event.SetStatus("0")
event.Complete()
}
//get a storage client from storage map, if not exist, create a new storage client
storeClient, err := this.getStorage(storeInfo.ipAddr, storeInfo.port)
if err != nil {
return nil, err
}
return storeClient.storageDownload(storeInfo, offset, downloadSize, fileName)
}
func EncodeRequest(Cat cat.Cat, bts []byte, req *request.Request) util.Error {
soapTran := Cat.NewTransaction("SOAP", "EncodeRequest")
result := util.Error{}
defer func() {
if result.Err != nil && !result.IsNormal {
soapTran.SetStatus(result.Err)
} else {
soapTran.SetStatus(CATTRANSUCCESS)
}
soapTran.Complete()
}()
if err := soapparse.EncReq(bts, req); err != nil {
util.LogErrorEvent(Cat, "SoapParseRequestError", err.Error())
result = util.Error{IsNormal: false, Err: err, Type: "SoapParseRequestError"}
}
return result
}
func DecodeResponse(Cat cat.Cat, header *response.Header, resp interface{}) ([]byte, util.Error) {
soapTran := Cat.NewTransaction("SOAP", "DecodeResponse")
result := util.Error{}
defer func() {
if result.Err != nil && !result.IsNormal {
soapTran.SetStatus(result.Err)
} else {
soapTran.SetStatus(CATTRANSUCCESS)
}
soapTran.Complete()
}()
content, err := soapparse.DecResp(header, resp) //
if err != nil {
util.LogErrorEvent(Cat, "SoapParseResponseError", err.Error())
result = util.Error{IsNormal: false, Err: err, Type: "SoapParseResponseError"}
}
return content, result
}
func postHandle(c cat.Cat, tran cat.Transaction, imagePath string, w http.ResponseWriter, err *error, handleOk *bool) {
p := recover()
if p != nil {
c.LogPanic(p)
tran.SetStatus(p)
log.WithFields(log.Fields{"uri": imagePath}).Error(*err)
}
if *handleOk {
tran.SetStatus("0")
tran.Complete()
} else {
tran.SetStatus(*err)
tran.Complete()
}
if p != nil || *err != nil {
http.Error(w, http.StatusText(404), 404)
}
}
func logEvent(cat cat.Cat, title string, name string, data map[string]string) {
event := cat.NewEvent(title, name)
if data != nil {
for k, v := range data {
event.AddData(k, v)
}
}
event.SetStatus("0")
event.Complete()
}