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3270e7a443
* Update go-swagger * vendor
651 lines
19 KiB
Go
Vendored
651 lines
19 KiB
Go
Vendored
// Copyright 2015 go-swagger maintainers
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package spec
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import (
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"encoding/json"
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"fmt"
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"strings"
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)
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// ExpandOptions provides options for spec expand
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type ExpandOptions struct {
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RelativeBase string
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SkipSchemas bool
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ContinueOnError bool
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AbsoluteCircularRef bool
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}
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// ResolveRefWithBase resolves a reference against a context root with preservation of base path
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func ResolveRefWithBase(root interface{}, ref *Ref, opts *ExpandOptions) (*Schema, error) {
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resolver, err := defaultSchemaLoader(root, opts, nil, nil)
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if err != nil {
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return nil, err
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}
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specBasePath := ""
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if opts != nil && opts.RelativeBase != "" {
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specBasePath, _ = absPath(opts.RelativeBase)
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}
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result := new(Schema)
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if err := resolver.Resolve(ref, result, specBasePath); err != nil {
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return nil, err
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}
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return result, nil
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}
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// ResolveRef resolves a reference against a context root
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// ref is guaranteed to be in root (no need to go to external files)
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// ResolveRef is ONLY called from the code generation module
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func ResolveRef(root interface{}, ref *Ref) (*Schema, error) {
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res, _, err := ref.GetPointer().Get(root)
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if err != nil {
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panic(err)
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}
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switch sch := res.(type) {
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case Schema:
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return &sch, nil
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case *Schema:
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return sch, nil
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case map[string]interface{}:
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b, _ := json.Marshal(sch)
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newSch := new(Schema)
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_ = json.Unmarshal(b, newSch)
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return newSch, nil
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default:
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return nil, fmt.Errorf("unknown type for the resolved reference")
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}
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}
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// ResolveParameter resolves a parameter reference against a context root
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func ResolveParameter(root interface{}, ref Ref) (*Parameter, error) {
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return ResolveParameterWithBase(root, ref, nil)
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}
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// ResolveParameterWithBase resolves a parameter reference against a context root and base path
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func ResolveParameterWithBase(root interface{}, ref Ref, opts *ExpandOptions) (*Parameter, error) {
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resolver, err := defaultSchemaLoader(root, opts, nil, nil)
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if err != nil {
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return nil, err
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}
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result := new(Parameter)
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if err := resolver.Resolve(&ref, result, ""); err != nil {
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return nil, err
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}
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return result, nil
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}
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// ResolveResponse resolves response a reference against a context root
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func ResolveResponse(root interface{}, ref Ref) (*Response, error) {
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return ResolveResponseWithBase(root, ref, nil)
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}
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// ResolveResponseWithBase resolves response a reference against a context root and base path
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func ResolveResponseWithBase(root interface{}, ref Ref, opts *ExpandOptions) (*Response, error) {
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resolver, err := defaultSchemaLoader(root, opts, nil, nil)
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if err != nil {
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return nil, err
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}
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result := new(Response)
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if err := resolver.Resolve(&ref, result, ""); err != nil {
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return nil, err
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}
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return result, nil
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}
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// ResolveItems resolves parameter items reference against a context root and base path.
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//
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// NOTE: stricly speaking, this construct is not supported by Swagger 2.0.
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// Similarly, $ref are forbidden in response headers.
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func ResolveItems(root interface{}, ref Ref, opts *ExpandOptions) (*Items, error) {
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resolver, err := defaultSchemaLoader(root, opts, nil, nil)
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if err != nil {
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return nil, err
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}
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basePath := ""
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if opts.RelativeBase != "" {
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basePath = opts.RelativeBase
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}
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result := new(Items)
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if err := resolver.Resolve(&ref, result, basePath); err != nil {
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return nil, err
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}
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return result, nil
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}
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// ResolvePathItem resolves response a path item against a context root and base path
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func ResolvePathItem(root interface{}, ref Ref, opts *ExpandOptions) (*PathItem, error) {
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resolver, err := defaultSchemaLoader(root, opts, nil, nil)
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if err != nil {
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return nil, err
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}
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basePath := ""
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if opts.RelativeBase != "" {
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basePath = opts.RelativeBase
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}
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result := new(PathItem)
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if err := resolver.Resolve(&ref, result, basePath); err != nil {
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return nil, err
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}
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return result, nil
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}
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// ExpandSpec expands the references in a swagger spec
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func ExpandSpec(spec *Swagger, options *ExpandOptions) error {
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resolver, err := defaultSchemaLoader(spec, options, nil, nil)
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// Just in case this ever returns an error.
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if resolver.shouldStopOnError(err) {
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return err
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}
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// getting the base path of the spec to adjust all subsequent reference resolutions
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specBasePath := ""
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if options != nil && options.RelativeBase != "" {
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specBasePath, _ = absPath(options.RelativeBase)
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}
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if options == nil || !options.SkipSchemas {
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for key, definition := range spec.Definitions {
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var def *Schema
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var err error
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if def, err = expandSchema(definition, []string{fmt.Sprintf("#/definitions/%s", key)}, resolver, specBasePath); resolver.shouldStopOnError(err) {
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return err
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}
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if def != nil {
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spec.Definitions[key] = *def
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}
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}
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}
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for key := range spec.Parameters {
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parameter := spec.Parameters[key]
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if err := expandParameterOrResponse(¶meter, resolver, specBasePath); resolver.shouldStopOnError(err) {
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return err
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}
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spec.Parameters[key] = parameter
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}
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for key := range spec.Responses {
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response := spec.Responses[key]
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if err := expandParameterOrResponse(&response, resolver, specBasePath); resolver.shouldStopOnError(err) {
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return err
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}
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spec.Responses[key] = response
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}
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if spec.Paths != nil {
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for key := range spec.Paths.Paths {
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path := spec.Paths.Paths[key]
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if err := expandPathItem(&path, resolver, specBasePath); resolver.shouldStopOnError(err) {
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return err
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}
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spec.Paths.Paths[key] = path
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}
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}
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return nil
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}
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const rootBase = "root"
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// baseForRoot loads in the cache the root document and produces a fake "root" base path entry
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// for further $ref resolution
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func baseForRoot(root interface{}, cache ResolutionCache) string {
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// cache the root document to resolve $ref's
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if root != nil {
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base, _ := absPath(rootBase)
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normalizedBase := normalizeAbsPath(base)
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debugLog("setting root doc in cache at: %s", normalizedBase)
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if cache == nil {
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cache = resCache
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}
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cache.Set(normalizedBase, root)
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return rootBase
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}
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return ""
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}
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// ExpandSchema expands the refs in the schema object with reference to the root object
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// go-openapi/validate uses this function
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// notice that it is impossible to reference a json schema in a different file other than root
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func ExpandSchema(schema *Schema, root interface{}, cache ResolutionCache) error {
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opts := &ExpandOptions{
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// when a root is specified, cache the root as an in-memory document for $ref retrieval
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RelativeBase: baseForRoot(root, cache),
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SkipSchemas: false,
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ContinueOnError: false,
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// when no base path is specified, remaining $ref (circular) are rendered with an absolute path
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AbsoluteCircularRef: true,
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}
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return ExpandSchemaWithBasePath(schema, cache, opts)
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}
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// ExpandSchemaWithBasePath expands the refs in the schema object, base path configured through expand options
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func ExpandSchemaWithBasePath(schema *Schema, cache ResolutionCache, opts *ExpandOptions) error {
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if schema == nil {
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return nil
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}
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var basePath string
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if opts.RelativeBase != "" {
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basePath, _ = absPath(opts.RelativeBase)
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}
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resolver, err := defaultSchemaLoader(nil, opts, cache, nil)
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if err != nil {
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return err
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}
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refs := []string{""}
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var s *Schema
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if s, err = expandSchema(*schema, refs, resolver, basePath); err != nil {
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return err
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}
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*schema = *s
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return nil
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}
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func expandItems(target Schema, parentRefs []string, resolver *schemaLoader, basePath string) (*Schema, error) {
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if target.Items != nil {
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if target.Items.Schema != nil {
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t, err := expandSchema(*target.Items.Schema, parentRefs, resolver, basePath)
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if err != nil {
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return nil, err
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}
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*target.Items.Schema = *t
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}
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for i := range target.Items.Schemas {
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t, err := expandSchema(target.Items.Schemas[i], parentRefs, resolver, basePath)
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if err != nil {
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return nil, err
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}
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target.Items.Schemas[i] = *t
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}
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}
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return &target, nil
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}
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func expandSchema(target Schema, parentRefs []string, resolver *schemaLoader, basePath string) (*Schema, error) {
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if target.Ref.String() == "" && target.Ref.IsRoot() {
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// normalizing is important
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newRef := normalizeFileRef(&target.Ref, basePath)
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target.Ref = *newRef
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return &target, nil
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}
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// change the base path of resolution when an ID is encountered
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// otherwise the basePath should inherit the parent's
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// important: ID can be relative path
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if target.ID != "" {
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debugLog("schema has ID: %s", target.ID)
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// handling the case when id is a folder
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// remember that basePath has to be a file
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refPath := target.ID
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if strings.HasSuffix(target.ID, "/") {
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// path.Clean here would not work correctly if basepath is http
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refPath = fmt.Sprintf("%s%s", refPath, "placeholder.json")
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}
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basePath = normalizePaths(refPath, basePath)
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}
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var t *Schema
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// if Ref is found, everything else doesn't matter
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// Ref also changes the resolution scope of children expandSchema
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if target.Ref.String() != "" {
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// here the resolution scope is changed because a $ref was encountered
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normalizedRef := normalizeFileRef(&target.Ref, basePath)
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normalizedBasePath := normalizedRef.RemoteURI()
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if resolver.isCircular(normalizedRef, basePath, parentRefs...) {
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// this means there is a cycle in the recursion tree: return the Ref
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// - circular refs cannot be expanded. We leave them as ref.
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// - denormalization means that a new local file ref is set relative to the original basePath
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debugLog("shortcut circular ref: basePath: %s, normalizedPath: %s, normalized ref: %s",
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basePath, normalizedBasePath, normalizedRef.String())
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if !resolver.options.AbsoluteCircularRef {
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target.Ref = *denormalizeFileRef(normalizedRef, normalizedBasePath, resolver.context.basePath)
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} else {
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target.Ref = *normalizedRef
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}
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return &target, nil
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}
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debugLog("basePath: %s: calling Resolve with target: %#v", basePath, target)
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if err := resolver.Resolve(&target.Ref, &t, basePath); resolver.shouldStopOnError(err) {
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return nil, err
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}
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if t != nil {
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parentRefs = append(parentRefs, normalizedRef.String())
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var err error
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transitiveResolver, err := resolver.transitiveResolver(basePath, target.Ref)
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if transitiveResolver.shouldStopOnError(err) {
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return nil, err
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}
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basePath = resolver.updateBasePath(transitiveResolver, normalizedBasePath)
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return expandSchema(*t, parentRefs, transitiveResolver, basePath)
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}
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}
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t, err := expandItems(target, parentRefs, resolver, basePath)
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if resolver.shouldStopOnError(err) {
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return &target, err
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}
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if t != nil {
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target = *t
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}
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for i := range target.AllOf {
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t, err := expandSchema(target.AllOf[i], parentRefs, resolver, basePath)
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if resolver.shouldStopOnError(err) {
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return &target, err
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}
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target.AllOf[i] = *t
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}
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for i := range target.AnyOf {
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t, err := expandSchema(target.AnyOf[i], parentRefs, resolver, basePath)
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if resolver.shouldStopOnError(err) {
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return &target, err
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}
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target.AnyOf[i] = *t
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}
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for i := range target.OneOf {
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t, err := expandSchema(target.OneOf[i], parentRefs, resolver, basePath)
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if resolver.shouldStopOnError(err) {
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return &target, err
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}
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if t != nil {
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target.OneOf[i] = *t
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}
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}
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if target.Not != nil {
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t, err := expandSchema(*target.Not, parentRefs, resolver, basePath)
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if resolver.shouldStopOnError(err) {
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return &target, err
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}
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if t != nil {
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*target.Not = *t
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}
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}
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for k := range target.Properties {
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t, err := expandSchema(target.Properties[k], parentRefs, resolver, basePath)
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if resolver.shouldStopOnError(err) {
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return &target, err
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}
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if t != nil {
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target.Properties[k] = *t
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}
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}
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if target.AdditionalProperties != nil && target.AdditionalProperties.Schema != nil {
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t, err := expandSchema(*target.AdditionalProperties.Schema, parentRefs, resolver, basePath)
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if resolver.shouldStopOnError(err) {
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return &target, err
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}
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if t != nil {
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*target.AdditionalProperties.Schema = *t
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}
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}
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for k := range target.PatternProperties {
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t, err := expandSchema(target.PatternProperties[k], parentRefs, resolver, basePath)
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if resolver.shouldStopOnError(err) {
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return &target, err
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}
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if t != nil {
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target.PatternProperties[k] = *t
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}
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}
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for k := range target.Dependencies {
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if target.Dependencies[k].Schema != nil {
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t, err := expandSchema(*target.Dependencies[k].Schema, parentRefs, resolver, basePath)
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if resolver.shouldStopOnError(err) {
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return &target, err
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}
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if t != nil {
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*target.Dependencies[k].Schema = *t
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}
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}
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}
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if target.AdditionalItems != nil && target.AdditionalItems.Schema != nil {
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t, err := expandSchema(*target.AdditionalItems.Schema, parentRefs, resolver, basePath)
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if resolver.shouldStopOnError(err) {
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return &target, err
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}
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if t != nil {
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*target.AdditionalItems.Schema = *t
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}
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}
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for k := range target.Definitions {
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t, err := expandSchema(target.Definitions[k], parentRefs, resolver, basePath)
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if resolver.shouldStopOnError(err) {
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return &target, err
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}
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if t != nil {
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target.Definitions[k] = *t
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}
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}
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return &target, nil
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}
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func expandPathItem(pathItem *PathItem, resolver *schemaLoader, basePath string) error {
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if pathItem == nil {
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return nil
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}
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parentRefs := []string{}
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if err := resolver.deref(pathItem, parentRefs, basePath); resolver.shouldStopOnError(err) {
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return err
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}
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if pathItem.Ref.String() != "" {
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transitiveResolver, err := resolver.transitiveResolver(basePath, pathItem.Ref)
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if transitiveResolver.shouldStopOnError(err) {
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return err
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}
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basePath = transitiveResolver.updateBasePath(resolver, basePath)
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resolver = transitiveResolver
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}
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pathItem.Ref = Ref{}
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for idx := range pathItem.Parameters {
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if err := expandParameterOrResponse(&(pathItem.Parameters[idx]), resolver, basePath); resolver.shouldStopOnError(err) {
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return err
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}
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}
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ops := []*Operation{
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pathItem.Get,
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pathItem.Head,
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pathItem.Options,
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pathItem.Put,
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pathItem.Post,
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pathItem.Patch,
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pathItem.Delete,
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}
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for _, op := range ops {
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if err := expandOperation(op, resolver, basePath); resolver.shouldStopOnError(err) {
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return err
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}
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}
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return nil
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}
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func expandOperation(op *Operation, resolver *schemaLoader, basePath string) error {
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if op == nil {
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return nil
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}
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for i := range op.Parameters {
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param := op.Parameters[i]
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if err := expandParameterOrResponse(¶m, resolver, basePath); resolver.shouldStopOnError(err) {
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return err
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}
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op.Parameters[i] = param
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}
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if op.Responses != nil {
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responses := op.Responses
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if err := expandParameterOrResponse(responses.Default, resolver, basePath); resolver.shouldStopOnError(err) {
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return err
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}
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for code := range responses.StatusCodeResponses {
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response := responses.StatusCodeResponses[code]
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if err := expandParameterOrResponse(&response, resolver, basePath); resolver.shouldStopOnError(err) {
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return err
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}
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responses.StatusCodeResponses[code] = response
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}
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}
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return nil
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}
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// ExpandResponseWithRoot expands a response based on a root document, not a fetchable document
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func ExpandResponseWithRoot(response *Response, root interface{}, cache ResolutionCache) error {
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opts := &ExpandOptions{
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RelativeBase: baseForRoot(root, cache),
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SkipSchemas: false,
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ContinueOnError: false,
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// when no base path is specified, remaining $ref (circular) are rendered with an absolute path
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AbsoluteCircularRef: true,
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}
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resolver, err := defaultSchemaLoader(root, opts, nil, nil)
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|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
return expandParameterOrResponse(response, resolver, opts.RelativeBase)
|
|
}
|
|
|
|
// ExpandResponse expands a response based on a basepath
|
|
// This is the exported version of expandResponse
|
|
// all refs inside response will be resolved relative to basePath
|
|
func ExpandResponse(response *Response, basePath string) error {
|
|
var specBasePath string
|
|
if basePath != "" {
|
|
specBasePath, _ = absPath(basePath)
|
|
}
|
|
opts := &ExpandOptions{
|
|
RelativeBase: specBasePath,
|
|
}
|
|
resolver, err := defaultSchemaLoader(nil, opts, nil, nil)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
return expandParameterOrResponse(response, resolver, opts.RelativeBase)
|
|
}
|
|
|
|
// ExpandParameterWithRoot expands a parameter based on a root document, not a fetchable document
|
|
func ExpandParameterWithRoot(parameter *Parameter, root interface{}, cache ResolutionCache) error {
|
|
opts := &ExpandOptions{
|
|
RelativeBase: baseForRoot(root, cache),
|
|
SkipSchemas: false,
|
|
ContinueOnError: false,
|
|
// when no base path is specified, remaining $ref (circular) are rendered with an absolute path
|
|
AbsoluteCircularRef: true,
|
|
}
|
|
resolver, err := defaultSchemaLoader(root, opts, nil, nil)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
return expandParameterOrResponse(parameter, resolver, opts.RelativeBase)
|
|
}
|
|
|
|
// ExpandParameter expands a parameter based on a basepath.
|
|
// This is the exported version of expandParameter
|
|
// all refs inside parameter will be resolved relative to basePath
|
|
func ExpandParameter(parameter *Parameter, basePath string) error {
|
|
var specBasePath string
|
|
if basePath != "" {
|
|
specBasePath, _ = absPath(basePath)
|
|
}
|
|
opts := &ExpandOptions{
|
|
RelativeBase: specBasePath,
|
|
}
|
|
resolver, err := defaultSchemaLoader(nil, opts, nil, nil)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
return expandParameterOrResponse(parameter, resolver, opts.RelativeBase)
|
|
}
|
|
|
|
func getRefAndSchema(input interface{}) (*Ref, *Schema, error) {
|
|
var ref *Ref
|
|
var sch *Schema
|
|
switch refable := input.(type) {
|
|
case *Parameter:
|
|
if refable == nil {
|
|
return nil, nil, nil
|
|
}
|
|
ref = &refable.Ref
|
|
sch = refable.Schema
|
|
case *Response:
|
|
if refable == nil {
|
|
return nil, nil, nil
|
|
}
|
|
ref = &refable.Ref
|
|
sch = refable.Schema
|
|
default:
|
|
return nil, nil, fmt.Errorf("expand: unsupported type %T. Input should be of type *Parameter or *Response", input)
|
|
}
|
|
return ref, sch, nil
|
|
}
|
|
|
|
func expandParameterOrResponse(input interface{}, resolver *schemaLoader, basePath string) error {
|
|
ref, _, err := getRefAndSchema(input)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if ref == nil {
|
|
return nil
|
|
}
|
|
parentRefs := []string{}
|
|
if err := resolver.deref(input, parentRefs, basePath); resolver.shouldStopOnError(err) {
|
|
return err
|
|
}
|
|
ref, sch, _ := getRefAndSchema(input)
|
|
if ref.String() != "" {
|
|
transitiveResolver, err := resolver.transitiveResolver(basePath, *ref)
|
|
if transitiveResolver.shouldStopOnError(err) {
|
|
return err
|
|
}
|
|
basePath = resolver.updateBasePath(transitiveResolver, basePath)
|
|
resolver = transitiveResolver
|
|
}
|
|
|
|
if sch != nil && sch.Ref.String() != "" {
|
|
// schema expanded to a $ref in another root
|
|
var ern error
|
|
sch.Ref, ern = NewRef(normalizePaths(sch.Ref.String(), ref.RemoteURI()))
|
|
if ern != nil {
|
|
return ern
|
|
}
|
|
}
|
|
if ref != nil {
|
|
*ref = Ref{}
|
|
}
|
|
|
|
if !resolver.options.SkipSchemas && sch != nil {
|
|
s, err := expandSchema(*sch, parentRefs, resolver, basePath)
|
|
if resolver.shouldStopOnError(err) {
|
|
return err
|
|
}
|
|
*sch = *s
|
|
}
|
|
return nil
|
|
}
|