client.Start() will take some minutes to start when the namespaces not exist on Apollo about agollo HOT 7 CLOSED

package main

import (
    "time"
    "fmt"
    "net/url"
    "net/http"
)

const (
    ApolloServerEndpoint = "http://x.x.x.x:8080"   // Apollo Config Server Endpoint
    HttpClientTimeout = time.Second * 90    // Notification will timeout if < 60s when namespace absent.
)

func main() {
    testAgollo("xxx", "default", "switch")
    testAgollo("xxx", "default", "not-exists")
    testAgollo("xxx", "default", "switch")
}

func testAgollo(app, cluster, ns string) {
    t := time.Now()
    defer func() {
        fmt.Printf(">>>\tTime cost for namespace (%s): %v\n", ns, time.Since(t))
    }()

    u, _ := url.Parse(ApolloServerEndpoint)
    u, _ = u.Parse("/notifications/v2")

    req, _ := http.NewRequest(http.MethodGet, u.String(), nil)
    args := req.URL.Query()
    args.Add("appId", app)
    args.Add("cluster", cluster)
    args.Add("notifications", fmt.Sprintf("[{\"namespaceName\": \"%s\", \"notificationId\":-1}]", ns))
    req.URL.RawQuery = args.Encode()

    c := http.Client{Timeout: HttpClientTimeout}
    rsp, e := c.Do(req)
    if e != nil {
        fmt.Println("failed to send request to apollo: ", e)
        return
    }
    fmt.Println("apollo response code: ", rsp.StatusCode)
    return
}