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queue.go
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queue.go
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package mns
import (
"fmt"
"github.com/aliyun/alibaba-cloud-sdk-go/sdk"
"github.com/aliyun/alibaba-cloud-sdk-go/sdk/auth"
"github.com/aliyun/alibaba-cloud-sdk-go/sdk/auth/credentials"
"github.com/aliyun/alibaba-cloud-sdk-go/sdk/auth/signers"
"github.com/aliyun/alibaba-cloud-sdk-go/sdk/errors"
"github.com/aliyun/alibaba-cloud-sdk-go/sdk/requests"
"github.com/aliyun/alibaba-cloud-sdk-go/sdk/responses"
"net/http"
"strconv"
)
type Queue struct {
credential *credentials.StsTokenCredential
httpClient *http.Client
isRunning bool
config *sdk.Config
signer auth.Signer
}
func NewClientWithStsToken(regionId, stsAccessKeyId, stsAccessKeySecret, stsToken string) (queue *Queue, err error) {
queue = &Queue{}
err = queue.InitWithStsToken(regionId, stsAccessKeyId, stsAccessKeySecret, stsToken)
return
}
func (queue *Queue) InitWithStsToken(regionId, stsAccessKeyId, stsAccessKeySecret, stsToken string) (err error) {
credential := &credentials.StsTokenCredential{
AccessKeyId: stsAccessKeyId,
AccessKeySecret: stsAccessKeySecret,
AccessKeyStsToken: stsToken,
}
queue.signer = signers.NewStsTokenSigner(credential)
config := queue.InitClientConfig()
return queue.InitWithOptions(config, credential)
}
func (queue *Queue) InitClientConfig() (config *sdk.Config) {
if queue.config != nil {
return queue.config
} else {
return sdk.NewConfig()
}
}
func (queue *Queue) InitWithOptions(config *sdk.Config, credential auth.Credential) (err error) {
queue.isRunning = true
queue.config = config
if err != nil {
return
}
queue.httpClient = &http.Client{}
if config.HttpTransport != nil {
queue.httpClient.Transport = config.HttpTransport
}
if config.Timeout > 0 {
queue.httpClient.Timeout = config.Timeout
}
return
}
func (queue *Queue) DoActionWithSigner(request requests.AcsRequest, response responses.AcsResponse) (err error) {
// add clientVersion
request.GetHeaders()["x-sdk-core-version"] = sdk.Version
if request.GetScheme() == "" {
request.SetScheme("HTTP")
}
// init request params
err = requests.InitParams(request)
if err != nil {
return
}
// signature
httpRequest, err := buildHttpRequest(request, queue.signer)
if err != nil {
return
}
if queue.config.UserAgent != "" {
httpRequest.Header.Set("User-Agent", queue.config.UserAgent)
}
var httpResponse *http.Response
for retryTimes := 0; retryTimes <= queue.config.MaxRetryTime; retryTimes++ {
httpResponse, err = queue.httpClient.Do(httpRequest)
//var timeout bool
// receive error
if err != nil {
if !queue.config.AutoRetry {
return
//} else if timeout = isTimeout(err); !timeout {
// // if not timeout error, return
// return
} else if retryTimes >= queue.config.MaxRetryTime {
// timeout but reached the max retry times, return
timeoutErrorMsg := fmt.Sprintf(errors.TimeoutErrorMessage, strconv.Itoa(retryTimes+1), strconv.Itoa(retryTimes+1))
err = errors.NewClientError(errors.TimeoutErrorCode, timeoutErrorMsg, err)
return
}
}
// if status code >= 500 or timeout, will trigger retry
if queue.config.AutoRetry && (err != nil || isServerError(httpResponse)) {
// rewrite signatureNonce and signature
httpRequest, err = buildHttpRequest(request, queue.signer)
if err != nil {
return
}
continue
}
break
}
err = responses.Unmarshal(response, httpResponse, request.GetAcceptFormat())
// wrap server errors
if serverErr, ok := err.(*errors.ServerError); ok {
var wrapInfo = map[string]string{}
wrapInfo["StringToSign"] = request.GetStringToSign()
err = errors.WrapServerError(serverErr, wrapInfo)
}
return
}
func isServerError(httpResponse *http.Response) bool {
return httpResponse.StatusCode >= http.StatusInternalServerError
}
func buildHttpRequest(request requests.AcsRequest, singer auth.Signer) (httpRequest *http.Request, err error) {
err = signMnsRoaRequest(request, singer)
if err != nil {
return
}
requestMethod := request.GetMethod()
requestUrl := request.BuildUrl()
body := request.GetBodyReader()
httpRequest, err = http.NewRequest(requestMethod, requestUrl, body)
if err != nil {
return
}
for key, value := range request.GetHeaders() {
httpRequest.Header[key] = []string{value}
}
// host is a special case
if host, containsHost := request.GetHeaders()["Host"]; containsHost {
httpRequest.Host = host
}
return
}
func (queue *Queue) Shutdown() {
queue.isRunning = false
}