optional readOnly and writeOnly validations (#758)

.github/docs/openapi3.txt

@@ -113,6 +113,8 @@ type SchemaRefs []*SchemaRef
 type SchemaValidationOption func(*schemaValidationSettings)
     func DefaultsSet(f func()) SchemaValidationOption
     func DisablePatternValidation() SchemaValidationOption
+    func DisableReadOnlyValidation() SchemaValidationOption
+    func DisableWriteOnlyValidation() SchemaValidationOption
     func EnableFormatValidation() SchemaValidationOption
     func FailFast() SchemaValidationOption
     func MultiErrors() SchemaValidationOption

openapi3/issue689_test.go

@@ -0,0 +1,107 @@
+package openapi3_test
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+
+	"github.com/getkin/kin-openapi/openapi3"
+)
+
+func TestIssue689(t *testing.T) {
+	t.Parallel()
+
+	tests := [...]struct {
+		name     string
+		schema   *openapi3.Schema
+		value    map[string]interface{}
+		opts     []openapi3.SchemaValidationOption
+		checkErr require.ErrorAssertionFunc
+	}{
+		// read-only
+		{
+			name: "read-only property succeeds when read-only validation is disabled",
+			schema: openapi3.NewSchema().WithProperties(map[string]*openapi3.Schema{
+				"foo": {Type: "boolean", ReadOnly: true}}),
+			value: map[string]interface{}{"foo": true},
+			opts: []openapi3.SchemaValidationOption{
+				openapi3.VisitAsRequest(),
+				openapi3.DisableReadOnlyValidation()},
+			checkErr: require.NoError,
+		},
+		{
+			name: "non read-only property succeeds when read-only validation is disabled",
+			schema: openapi3.NewSchema().WithProperties(map[string]*openapi3.Schema{
+				"foo": {Type: "boolean", ReadOnly: false}}),
+			opts: []openapi3.SchemaValidationOption{
+				openapi3.VisitAsRequest()},
+			value:    map[string]interface{}{"foo": true},
+			checkErr: require.NoError,
+		},
+		{
+			name: "read-only property fails when read-only validation is enabled",
+			schema: openapi3.NewSchema().WithProperties(map[string]*openapi3.Schema{
+				"foo": {Type: "boolean", ReadOnly: true}}),
+			opts: []openapi3.SchemaValidationOption{
+				openapi3.VisitAsRequest()},
+			value:    map[string]interface{}{"foo": true},
+			checkErr: require.Error,
+		},
+		{
+			name: "non read-only property succeeds when read-only validation is enabled",
+			schema: openapi3.NewSchema().WithProperties(map[string]*openapi3.Schema{
+				"foo": {Type: "boolean", ReadOnly: false}}),
+			opts: []openapi3.SchemaValidationOption{
+				openapi3.VisitAsRequest()},
+			value:    map[string]interface{}{"foo": true},
+			checkErr: require.NoError,
+		},
+		// write-only
+		{
+			name: "write-only property succeeds when write-only validation is disabled",
+			schema: openapi3.NewSchema().WithProperties(map[string]*openapi3.Schema{
+				"foo": {Type: "boolean", WriteOnly: true}}),
+			value: map[string]interface{}{"foo": true},
+			opts: []openapi3.SchemaValidationOption{
+				openapi3.VisitAsResponse(),
+				openapi3.DisableWriteOnlyValidation()},
+			checkErr: require.NoError,
+		},
+		{
+			name: "non write-only property succeeds when write-only validation is disabled",
+			schema: openapi3.NewSchema().WithProperties(map[string]*openapi3.Schema{
+				"foo": {Type: "boolean", WriteOnly: false}}),
+			opts: []openapi3.SchemaValidationOption{
+				openapi3.VisitAsResponse()},
+			value:    map[string]interface{}{"foo": true},
+			checkErr: require.NoError,
+		},
+		{
+			name: "write-only property fails when write-only validation is enabled",
+			schema: openapi3.NewSchema().WithProperties(map[string]*openapi3.Schema{
+				"foo": {Type: "boolean", WriteOnly: true}}),
+			opts: []openapi3.SchemaValidationOption{
+				openapi3.VisitAsResponse()},
+			value:    map[string]interface{}{"foo": true},
+			checkErr: require.Error,
+		},
+		{
+			name: "non write-only property succeeds when write-only validation is enabled",
+			schema: openapi3.NewSchema().WithProperties(map[string]*openapi3.Schema{
+				"foo": {Type: "boolean", WriteOnly: false}}),
+			opts: []openapi3.SchemaValidationOption{
+				openapi3.VisitAsResponse()},
+			value:    map[string]interface{}{"foo": true},
+			checkErr: require.NoError,
+		},
+	}
+
+	for _, test := range tests {
+		test := test
+		t.Run(test.name, func(t *testing.T) {
+			t.Parallel()
+			err := test.schema.VisitJSON(test.value, test.opts...)
+			test.checkErr(t, err)
+		})
+	}
+}

openapi3/schema.go

@@ -1787,8 +1787,8 @@ func (schema *Schema) visitJSONObject(settings *schemaValidationSettings, value
 		sort.Strings(properties)
 		for _, propName := range properties {
 			propSchema := schema.Properties[propName]
-			reqRO := settings.asreq && propSchema.Value.ReadOnly
-			repWO := settings.asrep && propSchema.Value.WriteOnly
+			reqRO := settings.asreq && propSchema.Value.ReadOnly && !settings.readOnlyValidationDisabled
+			repWO := settings.asrep && propSchema.Value.WriteOnly && !settings.writeOnlyValidationDisabled
 
 			if value[propName] == nil {
 				if dlft := propSchema.Value.Default; dlft != nil && !reqRO && !repWO {

openapi3/schema_validation_settings.go

@@ -8,11 +8,13 @@ import (
 type SchemaValidationOption func(*schemaValidationSettings)
 
 type schemaValidationSettings struct {
-	failfast                  bool
-	multiError                bool
-	asreq, asrep              bool // exclusive (XOR) fields
-	formatValidationEnabled   bool
-	patternValidationDisabled bool
+	failfast                    bool
+	multiError                  bool
+	asreq, asrep                bool // exclusive (XOR) fields
+	formatValidationEnabled     bool
+	patternValidationDisabled   bool
+	readOnlyValidationDisabled  bool
+	writeOnlyValidationDisabled bool
 
 	onceSettingDefaults sync.Once
 	defaultsSet         func()
@@ -47,6 +49,16 @@ func DisablePatternValidation() SchemaValidationOption {
 	return func(s *schemaValidationSettings) { s.patternValidationDisabled = true }
 }
 
+// DisableReadOnlyValidation setting makes Validate not return an error when validating properties marked as read-only
+func DisableReadOnlyValidation() SchemaValidationOption {
+	return func(s *schemaValidationSettings) { s.readOnlyValidationDisabled = true }
+}
+
+// DisableWriteOnlyValidation setting makes Validate not return an error when validating properties marked as write-only
+func DisableWriteOnlyValidation() SchemaValidationOption {
+	return func(s *schemaValidationSettings) { s.writeOnlyValidationDisabled = true }
+}
+
 // DefaultsSet executes the given callback (once) IFF schema validation set default values.
 func DefaultsSet(f func()) SchemaValidationOption {
 	return func(s *schemaValidationSettings) { s.defaultsSet = f }

openapi3filter/issue689_test.go

@@ -0,0 +1,168 @@
+package openapi3filter
+
+import (
+	"io"
+	"net/http"
+	"strings"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+
+	"github.com/getkin/kin-openapi/openapi3"
+	"github.com/getkin/kin-openapi/routers/gorillamux"
+)
+
+func TestIssue689(t *testing.T) {
+	loader := openapi3.NewLoader()
+	ctx := loader.Context
+	spec := `
+    openapi: 3.0.0
+    info:
+         version: 1.0.0
+         title: Sample API
+    paths:
+         /items:
+          put:
+            requestBody:
+             content:
+              application/json:
+                schema:
+                  properties:
+                    testWithReadOnly:
+                      readOnly: true
+                      type: boolean
+                    testNoReadOnly:
+                      type: boolean
+                  type: object
+            responses:
+              '200':
+               description: OK
+          get:
+            responses:
+              '200':
+                description: OK
+                content:
+                  application/json:
+                    schema:
+                      properties:
+                        testWithWriteOnly:
+                          writeOnly: true
+                          type: boolean
+                        testNoWriteOnly:
+                          type: boolean
+`[1:]
+
+	doc, err := loader.LoadFromData([]byte(spec))
+	require.NoError(t, err)
+
+	err = doc.Validate(ctx)
+	require.NoError(t, err)
+
+	router, err := gorillamux.NewRouter(doc)
+	require.NoError(t, err)
+
+	tests := []struct {
+		name     string
+		options  *Options
+		body     string
+		method   string
+		checkErr require.ErrorAssertionFunc
+	}{
+		// read-only
+		{
+			name:     "non read-only property is added to request when validation enabled",
+			body:     `{"testNoReadOnly": true}`,
+			method:   http.MethodPut,
+			checkErr: require.NoError,
+		},
+		{
+			name:   "non read-only property is added to request when validation disabled",
+			body:   `{"testNoReadOnly": true}`,
+			method: http.MethodPut,
+			options: &Options{
+				ExcludeReadOnlyValidations: true,
+			},
+			checkErr: require.NoError,
+		},
+		{
+			name:     "read-only property is added to requests when validation enabled",
+			body:     `{"testWithReadOnly": true}`,
+			method:   http.MethodPut,
+			checkErr: require.Error,
+		},
+		{
+			name:   "read-only property is added to requests when validation disabled",
+			body:   `{"testWithReadOnly": true}`,
+			method: http.MethodPut,
+			options: &Options{
+				ExcludeReadOnlyValidations: true,
+			},
+			checkErr: require.NoError,
+		},
+		// write-only
+		{
+			name:     "non write-only property is added to request when validation enabled",
+			body:     `{"testNoWriteOnly": true}`,
+			method:   http.MethodGet,
+			checkErr: require.NoError,
+		},
+		{
+			name:   "non write-only property is added to request when validation disabled",
+			body:   `{"testNoWriteOnly": true}`,
+			method: http.MethodGet,
+			options: &Options{
+				ExcludeWriteOnlyValidations: true,
+			},
+			checkErr: require.NoError,
+		},
+		{
+			name:     "write-only property is added to requests when validation enabled",
+			body:     `{"testWithWriteOnly": true}`,
+			method:   http.MethodGet,
+			checkErr: require.Error,
+		},
+		{
+			name:   "write-only property is added to requests when validation disabled",
+			body:   `{"testWithWriteOnly": true}`,
+			method: http.MethodGet,
+			options: &Options{
+				ExcludeWriteOnlyValidations: true,
+			},
+			checkErr: require.NoError,
+		},
+	}
+
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			httpReq, err := http.NewRequest(test.method, "/items", strings.NewReader(test.body))
+			require.NoError(t, err)
+			httpReq.Header.Set("Content-Type", "application/json")
+			require.NoError(t, err)
+
+			route, pathParams, err := router.FindRoute(httpReq)
+			require.NoError(t, err)
+
+			requestValidationInput := &RequestValidationInput{
+				Request:    httpReq,
+				PathParams: pathParams,
+				Route:      route,
+				Options:    test.options,
+			}
+
+			if test.method == http.MethodGet {
+				responseValidationInput := &ResponseValidationInput{
+					RequestValidationInput: requestValidationInput,
+					Status:                 200,
+					Header:                 httpReq.Header,
+					Body:                   io.NopCloser(strings.NewReader(test.body)),
+					Options:                test.options,
+				}
+				err = ValidateResponse(ctx, responseValidationInput)
+
+			} else {
+				err = ValidateRequest(ctx, requestValidationInput)
+			}
+			test.checkErr(t, err)
+		})
+	}
+}

openapi3filter/options.go

@@ -15,6 +15,12 @@ type Options struct {
 	// Set ExcludeResponseBody so ValidateResponse skips response body validation
 	ExcludeResponseBody bool
 
+	// Set ExcludeReadOnlyValidations so ValidateRequest skips read-only validations
+	ExcludeReadOnlyValidations bool
+
+	// Set ExcludeWriteOnlyValidations so ValidateResponse skips write-only validations
+	ExcludeWriteOnlyValidations bool
+
 	// Set IncludeResponseStatus so ValidateResponse fails on response
 	// status not defined in OpenAPI spec
 	IncludeResponseStatus bool

openapi3filter/validate_request.go

@@ -272,7 +272,7 @@ func ValidateRequestBody(ctx context.Context, input *RequestValidationInput, req
 	}
 
 	defaultsSet := false
-	opts := make([]openapi3.SchemaValidationOption, 0, 3) // 3 potential opts here
+	opts := make([]openapi3.SchemaValidationOption, 0, 4) // 4 potential opts here
 	opts = append(opts, openapi3.VisitAsRequest())
 	if !options.SkipSettingDefaults {
 		opts = append(opts, openapi3.DefaultsSet(func() { defaultsSet = true }))
@@ -283,6 +283,9 @@ func ValidateRequestBody(ctx context.Context, input *RequestValidationInput, req
 	if options.customSchemaErrorFunc != nil {
 		opts = append(opts, openapi3.SetSchemaErrorMessageCustomizer(options.customSchemaErrorFunc))
 	}
+	if options.ExcludeReadOnlyValidations {
+		opts = append(opts, openapi3.DisableReadOnlyValidation())
+	}
 
 	// Validate JSON with the schema
 	if err := contentType.Schema.Value.VisitJSON(value, opts...); err != nil {

openapi3filter/validate_response.go

@@ -63,13 +63,16 @@ func ValidateResponse(ctx context.Context, input *ResponseValidationInput) error
 		return &ResponseError{Input: input, Reason: "response has not been resolved"}
 	}
 
-	opts := make([]openapi3.SchemaValidationOption, 0, 2)
+	opts := make([]openapi3.SchemaValidationOption, 0, 3) // 3 potential options here
 	if options.MultiError {
 		opts = append(opts, openapi3.MultiErrors())
 	}
 	if options.customSchemaErrorFunc != nil {
 		opts = append(opts, openapi3.SetSchemaErrorMessageCustomizer(options.customSchemaErrorFunc))
 	}
+	if options.ExcludeWriteOnlyValidations {
+		opts = append(opts, openapi3.DisableWriteOnlyValidation())
+	}
 
 	headers := make([]string, 0, len(response.Headers))
 	for k := range response.Headers {