英文:
Google Cloud Golang: How to parse project/zone/instance from instance URL?
问题
你可以使用URL解析函数来解析实例URL，以获取其项目、区域和实例部分。在Go语言中，你可以使用url.Parse函数来解析URL。以下是一个示例代码：
import ("fmt""net/url")func main() {instanceURL := "https://www.googleapis.com/compute/v1/projects/my-project/zones/us-central1-b/instances/instance-group-z0hf"parsedURL, err := url.Parse(instanceURL)if err != nil {fmt.Println("Failed to parse instance URL:", err)return}project := parsedURL.PathSegments()[3]zone := parsedURL.PathSegments()[5]instance := parsedURL.PathSegments()[7]fmt.Println("Project:", project)fmt.Println("Zone:", zone)fmt.Println("Instance:", instance)}
在上面的示例中，我们使用url.Parse函数解析实例URL，并使用PathSegments方法获取URL路径的各个部分。根据示例URL的结构，项目位于索引3，区域位于索引5，实例位于索引7。你可以根据实际URL的结构进行相应的调整。
希望这可以帮助到你！
英文:
I'm using compute.NewRegionInstanceGroupManagersService's ListManagedInstances call which returns ManagedInstance's.
ManagedInstance has a field Instance which is an instance url, like https://www.googleapis.com/compute/v1/projects/my-project/zones/us-central1-b/instances/instance-group-z0hf
Now I would like to get more details about this particular instance. So using InstanceService's Get call, the function signature looks like this:
func (r *InstancesService) Get(project string, zone string, instance string) *InstancesGetCall
What's the best way to parse the instance URL (see above) into its project, zone and instance parts? Or is there a way of using another method to pass the instance URL directly?
答案1
得分: 2
你可以这样做：
- 解析URL以获取其路径
- 通过斜杠组件拆分路径
- 迭代各个部分
- 定位静态字符串
- 获取下一个值并相应地赋值。
package mainimport ("fmt""net/url""strings")func main() {s := "https://www.googleapis.com/compute/v1/projects/my-project/zones/us-central1-b/instances/instance-group-z0hf"u, err := url.Parse(s)if err != nil {panic(err)}parts := strings.Split(u.Path, "/")var project stringvar zone stringvar inst stringfor i := 0; i < len(parts); i++ {if parts[i] == "projects" && i+1 < len(parts) {project = parts[i+1]i++} else if parts[i] == "zones" && i+1 < len(parts) {zone = parts[i+1]i++} else if parts[i] == "instances" && i+1 < len(parts) {inst = parts[i+1]i++}}fmt.Println(project, zone, inst)}//输出：//my-project us-central1-b instance-group-z0hf
或者，使用gorilla的路由引擎创建一个新的模式，将该模式应用于URL路径并收集输出结果。但这更复杂，可能没有必要。
英文:
you could do something like this,
- parse the URL to get its path
- split the path by slash component
- iterate the parts,
- locate static strings
- take the next value and assign it appropriately.
package mainimport ("fmt""net/url""strings")func main() {s := "https://www.googleapis.com/compute/v1/projects/my-project/zones/us-central1-b/instances/instance-group-z0hf"u, err := url.Parse(s)if err != nil {panic(err)}parts := strings.Split(u.Path, "/")var project stringvar zone stringvar inst stringfor i := 0; i < len(parts); i++ {if parts[i] == "projects" && i+1 < len(parts) {project = parts[i+1]i++} else if parts[i] == "zones" && i+1 < len(parts) {zone = parts[i+1]i++} else if parts[i] == "instances" && i+1 < len(parts) {inst = parts[i+1]i++}}fmt.Println(project, zone, inst)}//Ouptput://my-project us-central1-b instance-group-z0hf
Alternatively, use the route engine from gorilla to create a new pattern, apply the route to the url path and collect output results. But it is more complex and probably not justified.
答案2
得分: 0
URL是复杂的结构，最好的方法是使用url.Parse库。然后，你可以使用正则表达式或拆分函数从路径部分提取所需的数据。
英文:
URLs are complex animals, the best way is using the library url.Parse. Then you can use a regex or split to extract the data you need from the path part.
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