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gce_url.go
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/
gce_url.go
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package gce
import (
"fmt"
"strings"
)
type GoogleCloudURL struct {
Project string
Type string
Name string
Global bool
Zone string
}
func (u *GoogleCloudURL) BuildURL() string {
url := "https://www.googleapis.com/compute/v1/"
if u.Project != "" {
url += "projects/" + u.Project + "/"
}
if u.Global {
url += "global/"
}
if u.Zone != "" {
url += "zones/" + u.Zone + "/"
}
url += u.Type + "/" + u.Name
return url
}
func ParseGoogleCloudURL(u string) (*GoogleCloudURL, error) {
tokens := strings.Split(u, "/")
if len(tokens) < 3 {
return nil, fmt.Errorf("invalid google cloud URL (token count): %q", u)
}
if tokens[0] != "https:" || tokens[1] != "" || tokens[2] != "www.googleapis.com" {
return nil, fmt.Errorf("invalid google cloud URL (schema / host): %q", u)
}
if len(tokens) < 5 || tokens[3] != "compute" || tokens[4] != "v1" {
return nil, fmt.Errorf("invalid google cloud URL (not compute/v1): %q", u)
}
parsed := &GoogleCloudURL{}
pos := 5
for {
if pos >= len(tokens) {
return nil, fmt.Errorf("invalid google cloud URL (unexpected end): %q", u)
}
t := tokens[pos]
if t == "projects" {
pos++
if pos >= len(tokens) {
return nil, fmt.Errorf("invalid google cloud URL (unexpected projects): %q", u)
}
parsed.Project = tokens[pos]
} else if t == "zones" {
pos++
if pos >= len(tokens) {
return nil, fmt.Errorf("invalid google cloud URL (unexpected zones): %q", u)
}
parsed.Zone = tokens[pos]
} else if t == "global" {
parsed.Global = true
} else {
parsed.Type = tokens[pos]
pos++
if pos >= len(tokens) {
return nil, fmt.Errorf("invalid google cloud URL (no name): %q", u)
}
parsed.Name = tokens[pos]
pos++
if pos != len(tokens) {
return nil, fmt.Errorf("invalid google cloud URL (content after name): %q", u)
} else {
return parsed, nil
}
}
pos++
}
}