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gitea/vendor/github.com/go-openapi/spec/normalizer.go
Antoine GIRARD 9fe4437bda Use vendored go-swagger (#8087)
* Use vendored go-swagger

* vendor go-swagger

* revert un wanteed change

* remove un-needed GO111MODULE

* Update Makefile

Co-Authored-By: techknowlogick <matti@mdranta.net>
2019-09-04 22:53:54 +03:00

153 lines
4.7 KiB
Go
Vendored

// Copyright 2015 go-swagger maintainers
//
// 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 spec
import (
"fmt"
"net/url"
"os"
"path"
"path/filepath"
"strings"
)
// normalize absolute path for cache.
// on Windows, drive letters should be converted to lower as scheme in net/url.URL
func normalizeAbsPath(path string) string {
u, err := url.Parse(path)
if err != nil {
debugLog("normalize absolute path failed: %s", err)
return path
}
return u.String()
}
// base or refPath could be a file path or a URL
// given a base absolute path and a ref path, return the absolute path of refPath
// 1) if refPath is absolute, return it
// 2) if refPath is relative, join it with basePath keeping the scheme, hosts, and ports if exists
// base could be a directory or a full file path
func normalizePaths(refPath, base string) string {
refURL, _ := url.Parse(refPath)
if path.IsAbs(refURL.Path) || filepath.IsAbs(refPath) {
// refPath is actually absolute
if refURL.Host != "" {
return refPath
}
parts := strings.Split(refPath, "#")
result := filepath.FromSlash(parts[0])
if len(parts) == 2 {
result += "#" + parts[1]
}
return result
}
// relative refPath
baseURL, _ := url.Parse(base)
if !strings.HasPrefix(refPath, "#") {
// combining paths
if baseURL.Host != "" {
baseURL.Path = path.Join(path.Dir(baseURL.Path), refURL.Path)
} else { // base is a file
newBase := fmt.Sprintf("%s#%s", filepath.Join(filepath.Dir(base), filepath.FromSlash(refURL.Path)), refURL.Fragment)
return newBase
}
}
// copying fragment from ref to base
baseURL.Fragment = refURL.Fragment
return baseURL.String()
}
// denormalizePaths returns to simplest notation on file $ref,
// i.e. strips the absolute path and sets a path relative to the base path.
//
// This is currently used when we rewrite ref after a circular ref has been detected
func denormalizeFileRef(ref *Ref, relativeBase, originalRelativeBase string) *Ref {
debugLog("denormalizeFileRef for: %s", ref.String())
if ref.String() == "" || ref.IsRoot() || ref.HasFragmentOnly {
return ref
}
// strip relativeBase from URI
relativeBaseURL, _ := url.Parse(relativeBase)
relativeBaseURL.Fragment = ""
if relativeBaseURL.IsAbs() && strings.HasPrefix(ref.String(), relativeBase) {
// this should work for absolute URI (e.g. http://...): we have an exact match, just trim prefix
r, _ := NewRef(strings.TrimPrefix(ref.String(), relativeBase))
return &r
}
if relativeBaseURL.IsAbs() {
// other absolute URL get unchanged (i.e. with a non-empty scheme)
return ref
}
// for relative file URIs:
originalRelativeBaseURL, _ := url.Parse(originalRelativeBase)
originalRelativeBaseURL.Fragment = ""
if strings.HasPrefix(ref.String(), originalRelativeBaseURL.String()) {
// the resulting ref is in the expanded spec: return a local ref
r, _ := NewRef(strings.TrimPrefix(ref.String(), originalRelativeBaseURL.String()))
return &r
}
// check if we may set a relative path, considering the original base path for this spec.
// Example:
// spec is located at /mypath/spec.json
// my normalized ref points to: /mypath/item.json#/target
// expected result: item.json#/target
parts := strings.Split(ref.String(), "#")
relativePath, err := filepath.Rel(path.Dir(originalRelativeBaseURL.String()), parts[0])
if err != nil {
// there is no common ancestor (e.g. different drives on windows)
// leaves the ref unchanged
return ref
}
if len(parts) == 2 {
relativePath += "#" + parts[1]
}
r, _ := NewRef(relativePath)
return &r
}
// relativeBase could be an ABSOLUTE file path or an ABSOLUTE URL
func normalizeFileRef(ref *Ref, relativeBase string) *Ref {
// This is important for when the reference is pointing to the root schema
if ref.String() == "" {
r, _ := NewRef(relativeBase)
return &r
}
debugLog("normalizing %s against %s", ref.String(), relativeBase)
s := normalizePaths(ref.String(), relativeBase)
r, _ := NewRef(s)
return &r
}
// absPath returns the absolute path of a file
func absPath(fname string) (string, error) {
if strings.HasPrefix(fname, "http") {
return fname, nil
}
if filepath.IsAbs(fname) {
return fname, nil
}
wd, err := os.Getwd()
return filepath.Join(wd, fname), err
}