/
apiPath.go
145 lines (126 loc) · 3.16 KB
/
apiPath.go
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package engine
import (
"fmt"
"strings"
)
type APIPath struct {
Root string
Group string
Version string
ResourceType string
Name string
Namespace string
}
// NewAPIPath validates and parses an API path.
// See: https://kubernetes.io/docs/reference/using-api/api-concepts/
func NewAPIPath(path string) (*APIPath, error) {
trimmedPath := strings.Trim(path, "/ ")
paths := strings.Split(trimmedPath, "/")
if len(paths) < 3 || len(paths) > 7 {
return nil, fmt.Errorf("invalid path length %s", path)
}
if paths[0] != "api" && paths[0] != "apis" {
return nil, fmt.Errorf("urlPath must start with /api or /apis")
}
if paths[0] == "api" && paths[1] != "v1" {
return nil, fmt.Errorf("expected urlPath to start with /api/v1/")
}
if paths[0] == "api" {
// /api/v1/namespaces
if len(paths) == 3 {
return &APIPath{
Root: paths[0],
Group: paths[1],
ResourceType: paths[2],
}, nil
}
// /api/v1/namespaces/foo
if len(paths) == 4 {
return &APIPath{
Root: paths[0],
Group: paths[1],
ResourceType: paths[2],
Name: paths[3],
}, nil
}
// /api/v1/namespaces/foo/pods
if len(paths) == 5 {
return &APIPath{
Root: paths[0],
Group: paths[1],
Namespace: paths[3],
ResourceType: paths[4],
}, nil
}
if len(paths) == 6 {
return &APIPath{
Root: paths[0],
Group: paths[1],
Namespace: paths[3],
ResourceType: paths[4],
Name: paths[5],
}, nil
}
return nil, fmt.Errorf("invalid API v1 path %s", path)
}
// /apis/GROUP/VERSION/RESOURCETYPE/
if len(paths) == 4 {
return &APIPath{
Root: paths[0],
Group: paths[1],
Version: paths[2],
ResourceType: paths[3],
}, nil
}
// /apis/GROUP/VERSION/RESOURCETYPE/NAME
if len(paths) == 5 {
return &APIPath{
Root: paths[0],
Group: paths[1],
Version: paths[2],
ResourceType: paths[3],
Name: paths[4],
}, nil
}
// /apis/GROUP/VERSION/namespaces/NAMESPACE/RESOURCETYPE
if len(paths) == 6 {
return &APIPath{
Root: paths[0],
Group: paths[1],
Version: paths[2],
Namespace: paths[4],
ResourceType: paths[5],
}, nil
}
// /apis/GROUP/VERSION/namespaces/NAMESPACE/RESOURCETYPE/NAME
if len(paths) == 7 {
return &APIPath{
Root: paths[0],
Group: paths[1],
Version: paths[2],
Namespace: paths[4],
ResourceType: paths[5],
Name: paths[6],
}, nil
}
return nil, fmt.Errorf("invalid API path %s", path)
}
func (a *APIPath) String() string {
var paths []string
if a.Namespace != "" {
if a.Name == "" {
paths = []string{a.Root, a.Group, a.Version, a.ResourceType, "namespaces", a.Namespace}
} else {
paths = []string{a.Root, a.Group, a.Version, a.ResourceType, "namespaces", a.Namespace, a.Name}
}
} else {
if a.Name != "" {
paths = []string{a.Root, a.Group, a.Version, a.ResourceType, a.Name}
} else {
paths = []string{a.Root, a.Group, a.Version, a.ResourceType}
}
}
result := "/" + strings.Join(paths, "/")
result = strings.ReplaceAll(result, "//", "/")
return result
}