mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-12-19 11:30:24 +00:00
241 lines
7.9 KiB
Go
241 lines
7.9 KiB
Go
/*
|
|
Copyright 2022 The Kubernetes Authors.
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
package library
|
|
|
|
import (
|
|
"net/url"
|
|
|
|
"github.com/google/cel-go/cel"
|
|
"github.com/google/cel-go/common/types"
|
|
"github.com/google/cel-go/common/types/ref"
|
|
|
|
apiservercel "k8s.io/apiserver/pkg/cel"
|
|
)
|
|
|
|
// URLs provides a CEL function library extension of URL parsing functions.
|
|
//
|
|
// url
|
|
//
|
|
// Converts a string to a URL or results in an error if the string is not a valid URL. The URL must be an absolute URI
|
|
// or an absolute path.
|
|
//
|
|
// url(<string>) <URL>
|
|
//
|
|
// Examples:
|
|
//
|
|
// url('https://user:pass@example.com:80/path?query=val#fragment') // returns a URL
|
|
// url('/absolute-path') // returns a URL
|
|
// url('https://a:b:c/') // error
|
|
// url('../relative-path') // error
|
|
//
|
|
// isURL
|
|
//
|
|
// Returns true if a string is a valid URL. The URL must be an absolute URI or an absolute path.
|
|
//
|
|
// isURL( <string>) <bool>
|
|
//
|
|
// Examples:
|
|
//
|
|
// isURL('https://user:pass@example.com:80/path?query=val#fragment') // returns true
|
|
// isURL('/absolute-path') // returns true
|
|
// isURL('https://a:b:c/') // returns false
|
|
// isURL('../relative-path') // returns false
|
|
//
|
|
// getScheme / getHost / getHostname / getPort / getEscapedPath / getQuery
|
|
//
|
|
// Return the parsed components of a URL.
|
|
//
|
|
// - getScheme: If absent in the URL, returns an empty string.
|
|
//
|
|
// - getHostname: IPv6 addresses are returned without braces, e.g. "::1". If absent in the URL, returns an empty string.
|
|
//
|
|
// - getHost: IPv6 addresses are returned with braces, e.g. "[::1]". If absent in the URL, returns an empty string.
|
|
//
|
|
// - getEscapedPath: The string returned by getEscapedPath is URL escaped, e.g. "with space" becomes "with%20space".
|
|
// If absent in the URL, returns an empty string.
|
|
//
|
|
// - getPort: If absent in the URL, returns an empty string.
|
|
//
|
|
// - getQuery: Returns the query parameters in "matrix" form where a repeated query key is interpreted to
|
|
// mean that there are multiple values for that key. The keys and values are returned unescaped.
|
|
// If absent in the URL, returns an empty map.
|
|
//
|
|
// <URL>.getScheme() <string>
|
|
// <URL>.getHost() <string>
|
|
// <URL>.getHostname() <string>
|
|
// <URL>.getPort() <string>
|
|
// <URL>.getEscapedPath() <string>
|
|
// <URL>.getQuery() <map <string>, <list <string>>
|
|
//
|
|
// Examples:
|
|
//
|
|
// url('/path').getScheme() // returns ''
|
|
// url('https://example.com/').getScheme() // returns 'https'
|
|
// url('https://example.com:80/').getHost() // returns 'example.com:80'
|
|
// url('https://example.com/').getHost() // returns 'example.com'
|
|
// url('https://[::1]:80/').getHost() // returns '[::1]:80'
|
|
// url('https://[::1]/').getHost() // returns '[::1]'
|
|
// url('/path').getHost() // returns ''
|
|
// url('https://example.com:80/').getHostname() // returns 'example.com'
|
|
// url('https://127.0.0.1:80/').getHostname() // returns '127.0.0.1'
|
|
// url('https://[::1]:80/').getHostname() // returns '::1'
|
|
// url('/path').getHostname() // returns ''
|
|
// url('https://example.com:80/').getPort() // returns '80'
|
|
// url('https://example.com/').getPort() // returns ''
|
|
// url('/path').getPort() // returns ''
|
|
// url('https://example.com/path').getEscapedPath() // returns '/path'
|
|
// url('https://example.com/path with spaces/').getEscapedPath() // returns '/path%20with%20spaces/'
|
|
// url('https://example.com').getEscapedPath() // returns ''
|
|
// url('https://example.com/path?k1=a&k2=b&k2=c').getQuery() // returns { 'k1': ['a'], 'k2': ['b', 'c']}
|
|
// url('https://example.com/path?key with spaces=value with spaces').getQuery() // returns { 'key with spaces': ['value with spaces']}
|
|
// url('https://example.com/path?').getQuery() // returns {}
|
|
// url('https://example.com/path').getQuery() // returns {}
|
|
func URLs() cel.EnvOption {
|
|
return cel.Lib(urlsLib)
|
|
}
|
|
|
|
var urlsLib = &urls{}
|
|
|
|
type urls struct{}
|
|
|
|
func (*urls) LibraryName() string {
|
|
return "k8s.urls"
|
|
}
|
|
|
|
var urlLibraryDecls = map[string][]cel.FunctionOpt{
|
|
"url": {
|
|
cel.Overload("string_to_url", []*cel.Type{cel.StringType}, apiservercel.URLType,
|
|
cel.UnaryBinding(stringToUrl))},
|
|
"getScheme": {
|
|
cel.MemberOverload("url_get_scheme", []*cel.Type{apiservercel.URLType}, cel.StringType,
|
|
cel.UnaryBinding(getScheme))},
|
|
"getHost": {
|
|
cel.MemberOverload("url_get_host", []*cel.Type{apiservercel.URLType}, cel.StringType,
|
|
cel.UnaryBinding(getHost))},
|
|
"getHostname": {
|
|
cel.MemberOverload("url_get_hostname", []*cel.Type{apiservercel.URLType}, cel.StringType,
|
|
cel.UnaryBinding(getHostname))},
|
|
"getPort": {
|
|
cel.MemberOverload("url_get_port", []*cel.Type{apiservercel.URLType}, cel.StringType,
|
|
cel.UnaryBinding(getPort))},
|
|
"getEscapedPath": {
|
|
cel.MemberOverload("url_get_escaped_path", []*cel.Type{apiservercel.URLType}, cel.StringType,
|
|
cel.UnaryBinding(getEscapedPath))},
|
|
"getQuery": {
|
|
cel.MemberOverload("url_get_query", []*cel.Type{apiservercel.URLType},
|
|
cel.MapType(cel.StringType, cel.ListType(cel.StringType)),
|
|
cel.UnaryBinding(getQuery))},
|
|
"isURL": {
|
|
cel.Overload("is_url_string", []*cel.Type{cel.StringType}, cel.BoolType,
|
|
cel.UnaryBinding(isURL))},
|
|
}
|
|
|
|
func (*urls) CompileOptions() []cel.EnvOption {
|
|
options := []cel.EnvOption{}
|
|
for name, overloads := range urlLibraryDecls {
|
|
options = append(options, cel.Function(name, overloads...))
|
|
}
|
|
return options
|
|
}
|
|
|
|
func (*urls) ProgramOptions() []cel.ProgramOption {
|
|
return []cel.ProgramOption{}
|
|
}
|
|
|
|
func stringToUrl(arg ref.Val) ref.Val {
|
|
s, ok := arg.Value().(string)
|
|
if !ok {
|
|
return types.MaybeNoSuchOverloadErr(arg)
|
|
}
|
|
// Use ParseRequestURI to check the URL before conversion.
|
|
// ParseRequestURI requires absolute URLs and is used by the OpenAPIv3 'uri' format.
|
|
_, err := url.ParseRequestURI(s)
|
|
if err != nil {
|
|
return types.NewErr("URL parse error during conversion from string: %v", err)
|
|
}
|
|
// We must parse again with Parse since ParseRequestURI incorrectly parses URLs that contain a fragment
|
|
// part and will incorrectly append the fragment to either the path or the query, depending on which it was adjacent to.
|
|
u, err := url.Parse(s)
|
|
if err != nil {
|
|
// Errors are not expected here since Parse is a more lenient parser than ParseRequestURI.
|
|
return types.NewErr("URL parse error during conversion from string: %v", err)
|
|
}
|
|
return apiservercel.URL{URL: u}
|
|
}
|
|
|
|
func getScheme(arg ref.Val) ref.Val {
|
|
u, ok := arg.Value().(*url.URL)
|
|
if !ok {
|
|
return types.MaybeNoSuchOverloadErr(arg)
|
|
}
|
|
return types.String(u.Scheme)
|
|
}
|
|
|
|
func getHost(arg ref.Val) ref.Val {
|
|
u, ok := arg.Value().(*url.URL)
|
|
if !ok {
|
|
return types.MaybeNoSuchOverloadErr(arg)
|
|
}
|
|
return types.String(u.Host)
|
|
}
|
|
|
|
func getHostname(arg ref.Val) ref.Val {
|
|
u, ok := arg.Value().(*url.URL)
|
|
if !ok {
|
|
return types.MaybeNoSuchOverloadErr(arg)
|
|
}
|
|
return types.String(u.Hostname())
|
|
}
|
|
|
|
func getPort(arg ref.Val) ref.Val {
|
|
u, ok := arg.Value().(*url.URL)
|
|
if !ok {
|
|
return types.MaybeNoSuchOverloadErr(arg)
|
|
}
|
|
return types.String(u.Port())
|
|
}
|
|
|
|
func getEscapedPath(arg ref.Val) ref.Val {
|
|
u, ok := arg.Value().(*url.URL)
|
|
if !ok {
|
|
return types.MaybeNoSuchOverloadErr(arg)
|
|
}
|
|
return types.String(u.EscapedPath())
|
|
}
|
|
|
|
func getQuery(arg ref.Val) ref.Val {
|
|
u, ok := arg.Value().(*url.URL)
|
|
if !ok {
|
|
return types.MaybeNoSuchOverloadErr(arg)
|
|
}
|
|
|
|
result := map[ref.Val]ref.Val{}
|
|
for k, v := range u.Query() {
|
|
result[types.String(k)] = types.NewStringList(types.DefaultTypeAdapter, v)
|
|
}
|
|
return types.NewRefValMap(types.DefaultTypeAdapter, result)
|
|
}
|
|
|
|
func isURL(arg ref.Val) ref.Val {
|
|
s, ok := arg.Value().(string)
|
|
if !ok {
|
|
return types.MaybeNoSuchOverloadErr(arg)
|
|
}
|
|
_, err := url.ParseRequestURI(s)
|
|
return types.Bool(err == nil)
|
|
}
|