go - 使用google.golang.org/api/discovery/v1的Golang示例

Question

我正在尝试使用Go发现来调用尚未具有客户端库的API。但是我找不到一个例子。
目标是使用net / http进行替换:

func AnotherFunc() {
// get short-lived oauth access token so we can make authenticated API call
    accessToken, _ := getOauthAccessToken()

    client := &http.Client{}
    rolesQueryString := ""
    for _, r := range configs.CustomOwnerRoles {
        rolesQueryString += "analysisQuery.accessSelector.roles=" +
            url.QueryEscape(r) + "&"
    }
    // documentation for this api call can be found here:
    // https://cloud.google.com/asset-inventory/docs/reference/rest/v1p4beta1/TopLevel/analyzeIamPolicy
    // we're making a REST api call instead of using client libraries because this is a new
    // API, and the client libraries haven't been generated for it yet.
    req, err := http.NewRequest("GET", "https://cloudasset.googleapis.com/v1p4beta1/"+
        configs.OrganizationID+
        ":analyzeIamPolicy?"+
        rolesQueryString+
        "&analysisQuery.identitySelector.identity="+
        url.QueryEscape("user:"+user)+
        "&analysisQuery.resourceSelector.fullResourceName="+
        url.QueryEscape("//cloudresourcemanager.googleapis.com/projects/"+projectID)+
        "&options.expandGroups=true", nil)
}

我想使用发现库，但仅此而已:

    api := flag.String("api", "cloudasset", "api to query")
    resource := flag.String("resource", "", "resource to generate")
    version := flag.String("version", "v1p4beta1", "api version to query")
    flag.Parse()

    if *api == "" || *resource == "" {
        flag.PrintDefaults()
        log.Fatal("usage: go run schemagen.go -api $API -resource $RESOURCE -version $VERSION")
    }

    ctx := context.Background()
    discoveryService, err := discovery.NewService(ctx)
    if err != nil {
        log.Fatal(fmt.Errorf("Error creating service: %v", err))
    }

    resp, err := discoveryService.Apis.GetRest(*api, *version).Fields("schemas").Do()

如何使用 resp继续进行API调用？

Answer 1

我通过go查找了发现API用法的示例，并且我发现基本上没有任何易于使用的东西。
我找到了Medium article，其中包含一些使用RESTFUL API资源(例如Cloud Discovery Service)的指南。
我认为答案是您需要调用resp.Body.Close()以确保正确处理资源，稍后在示例中，有两种获取数据的方法，因此您必须添加类似这个:

defer resp.Body.Close()
body, err := http.ioutil.ReadAll(resp.Body)
if err ≠ nil {
    log.Failure(err)
}
log.Println(string(body))