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topic_subscribe.go
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/
topic_subscribe.go
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package alimns
import (
"context"
"errors"
"fmt"
"net/http"
"regexp"
)
func checkTopicName(name string) bool {
regex := regexp.MustCompile(`^[0-9a-zA-Z]{1}[0-9a-zA-Z-]{0,255}$`)
return regex.MatchString(name)
}
func checkSubscription(name string) bool {
regex := regexp.MustCompile(`^[0-9a-zA-Z]{1}[0-9a-zA-Z-]{0,255}$`)
return regex.MatchString(name)
}
// Subscribe 订阅主题
func (c *Client) Subscribe(topic, subscription string, endpoint EndPointer, setters ...SubscribeParamSetter) error {
var err error
if !checkTopicName(topic) {
return errors.New("unqualified topic name")
}
if !checkSubscription(subscription) {
return errors.New("unqualified subscription nname")
}
ep, err := endpoint.EndPoint()
if err != nil {
return errors.New("invalid endpoint")
}
subscribeParam := defaultSubscribeParam
for _, setter := range setters {
err = setter(&subscribeParam)
if err != nil {
return err
}
}
subscribeParam.EndPoint = ep
requestLine := fmt.Sprintf(mnsSubscribe, topic, subscription)
req := c.ca.NewRequest().Put().WithPath(requestLine).WithXMLBody(&subscribeParam).WithTimeout(apiTimeout)
resp, err := c.ca.Do(context.TODO(), req)
if err != nil {
return err
}
switch resp.StatusCode() {
case http.StatusCreated, http.StatusNoContent:
return nil
default:
var respErr RespErr
if err := resp.DecodeFromXML(&respErr); err != nil {
return nil
}
switch respErr.Code {
case subscriptionNameLengthError.Error():
return subscriptionNameLengthError
case subscriptionNameInvalidError.Error():
return subscriptionNameInvalidError
case subscriptionAlreadyExistError.Error():
return subscriptionAlreadyExistError
case endpointInvalidError.Error():
return endpointInvalidError
case invalidArgumentError.Error():
return invalidArgumentError
default:
return errors.New(respErr.Code)
}
}
}