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270 lines
9.4 KiB
270 lines
9.4 KiB
// 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 validate
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import (
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"fmt"
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"github.com/go-openapi/spec"
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)
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// ExampleValidator validates example values defined in a spec
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type exampleValidator struct {
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SpecValidator *SpecValidator
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visitedSchemas map[string]bool
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}
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// resetVisited resets the internal state of visited schemas
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func (ex *exampleValidator) resetVisited() {
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ex.visitedSchemas = map[string]bool{}
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}
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// beingVisited asserts a schema is being visited
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func (ex *exampleValidator) beingVisited(path string) {
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ex.visitedSchemas[path] = true
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}
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// isVisited tells if a path has already been visited
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func (ex *exampleValidator) isVisited(path string) bool {
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return isVisited(path, ex.visitedSchemas)
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}
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// Validate validates the example values declared in the swagger spec
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// Example values MUST conform to their schema.
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//
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// With Swagger 2.0, examples are supported in:
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// - schemas
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// - individual property
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// - responses
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//
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func (ex *exampleValidator) Validate() (errs *Result) {
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errs = new(Result)
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if ex == nil || ex.SpecValidator == nil {
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return errs
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}
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ex.resetVisited()
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errs.Merge(ex.validateExampleValueValidAgainstSchema()) // error -
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return errs
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}
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func (ex *exampleValidator) validateExampleValueValidAgainstSchema() *Result {
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// every example value that is specified must validate against the schema for that property
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// in: schemas, properties, object, items
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// not in: headers, parameters without schema
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res := new(Result)
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s := ex.SpecValidator
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for method, pathItem := range s.analyzer.Operations() {
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for path, op := range pathItem {
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// parameters
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for _, param := range paramHelp.safeExpandedParamsFor(path, method, op.ID, res, s) {
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// As of swagger 2.0, Examples are not supported in simple parameters
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// However, it looks like it is supported by go-openapi
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// reset explored schemas to get depth-first recursive-proof exploration
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ex.resetVisited()
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// Check simple parameters first
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// default values provided must validate against their inline definition (no explicit schema)
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if param.Example != nil && param.Schema == nil {
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// check param default value is valid
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red := NewParamValidator(¶m, s.KnownFormats).Validate(param.Example)
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if red.HasErrorsOrWarnings() {
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res.AddWarnings(exampleValueDoesNotValidateMsg(param.Name, param.In))
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res.MergeAsWarnings(red)
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}
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}
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// Recursively follows Items and Schemas
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if param.Items != nil {
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red := ex.validateExampleValueItemsAgainstSchema(param.Name, param.In, ¶m, param.Items)
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if red.HasErrorsOrWarnings() {
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res.AddWarnings(exampleValueItemsDoesNotValidateMsg(param.Name, param.In))
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res.Merge(red)
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}
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}
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if param.Schema != nil {
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// Validate example value against schema
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red := ex.validateExampleValueSchemaAgainstSchema(param.Name, param.In, param.Schema)
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if red.HasErrorsOrWarnings() {
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res.AddWarnings(exampleValueDoesNotValidateMsg(param.Name, param.In))
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res.Merge(red)
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}
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}
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}
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if op.Responses != nil {
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if op.Responses.Default != nil {
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// Same constraint on default Response
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res.Merge(ex.validateExampleInResponse(op.Responses.Default, jsonDefault, path, 0, op.ID))
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}
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// Same constraint on regular Responses
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if op.Responses.StatusCodeResponses != nil { // Safeguard
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for code, r := range op.Responses.StatusCodeResponses {
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res.Merge(ex.validateExampleInResponse(&r, "response", path, code, op.ID))
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}
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}
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} else if op.ID != "" {
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// Empty op.ID means there is no meaningful operation: no need to report a specific message
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res.AddErrors(noValidResponseMsg(op.ID))
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}
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}
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}
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if s.spec.Spec().Definitions != nil { // Safeguard
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// reset explored schemas to get depth-first recursive-proof exploration
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ex.resetVisited()
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for nm, sch := range s.spec.Spec().Definitions {
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res.Merge(ex.validateExampleValueSchemaAgainstSchema(fmt.Sprintf("definitions.%s", nm), "body", &sch))
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}
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}
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return res
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}
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func (ex *exampleValidator) validateExampleInResponse(resp *spec.Response, responseType, path string, responseCode int, operationID string) *Result {
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s := ex.SpecValidator
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response, res := responseHelp.expandResponseRef(resp, path, s)
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if !res.IsValid() { // Safeguard
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return res
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}
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responseName, responseCodeAsStr := responseHelp.responseMsgVariants(responseType, responseCode)
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// nolint: dupl
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if response.Headers != nil { // Safeguard
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for nm, h := range response.Headers {
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// reset explored schemas to get depth-first recursive-proof exploration
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ex.resetVisited()
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if h.Example != nil {
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red := NewHeaderValidator(nm, &h, s.KnownFormats).Validate(h.Example)
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if red.HasErrorsOrWarnings() {
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res.AddWarnings(exampleValueHeaderDoesNotValidateMsg(operationID, nm, responseName))
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res.MergeAsWarnings(red)
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}
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}
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// Headers have inline definition, like params
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if h.Items != nil {
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red := ex.validateExampleValueItemsAgainstSchema(nm, "header", &h, h.Items)
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if red.HasErrorsOrWarnings() {
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res.AddWarnings(exampleValueHeaderItemsDoesNotValidateMsg(operationID, nm, responseName))
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res.MergeAsWarnings(red)
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}
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}
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if _, err := compileRegexp(h.Pattern); err != nil {
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res.AddErrors(invalidPatternInHeaderMsg(operationID, nm, responseName, h.Pattern, err))
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}
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// Headers don't have schema
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}
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}
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if response.Schema != nil {
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// reset explored schemas to get depth-first recursive-proof exploration
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ex.resetVisited()
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red := ex.validateExampleValueSchemaAgainstSchema(responseCodeAsStr, "response", response.Schema)
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if red.HasErrorsOrWarnings() {
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// Additional message to make sure the context of the error is not lost
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res.AddWarnings(exampleValueInDoesNotValidateMsg(operationID, responseName))
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res.Merge(red)
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}
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}
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if response.Examples != nil {
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if response.Schema != nil {
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if example, ok := response.Examples["application/json"]; ok {
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res.MergeAsWarnings(NewSchemaValidator(response.Schema, s.spec.Spec(), path+".examples", s.KnownFormats, SwaggerSchema(true)).Validate(example))
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} else {
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// TODO: validate other media types too
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res.AddWarnings(examplesMimeNotSupportedMsg(operationID, responseName))
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}
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} else {
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res.AddWarnings(examplesWithoutSchemaMsg(operationID, responseName))
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}
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}
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return res
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}
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func (ex *exampleValidator) validateExampleValueSchemaAgainstSchema(path, in string, schema *spec.Schema) *Result {
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if schema == nil || ex.isVisited(path) {
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// Avoids recursing if we are already done with that check
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return nil
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}
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ex.beingVisited(path)
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s := ex.SpecValidator
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res := new(Result)
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if schema.Example != nil {
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res.MergeAsWarnings(NewSchemaValidator(schema, s.spec.Spec(), path+".example", s.KnownFormats, SwaggerSchema(true)).Validate(schema.Example))
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}
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if schema.Items != nil {
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if schema.Items.Schema != nil {
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res.Merge(ex.validateExampleValueSchemaAgainstSchema(path+".items.example", in, schema.Items.Schema))
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}
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// Multiple schemas in items
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if schema.Items.Schemas != nil { // Safeguard
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for i, sch := range schema.Items.Schemas {
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res.Merge(ex.validateExampleValueSchemaAgainstSchema(fmt.Sprintf("%s.items[%d].example", path, i), in, &sch))
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}
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}
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}
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if _, err := compileRegexp(schema.Pattern); err != nil {
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res.AddErrors(invalidPatternInMsg(path, in, schema.Pattern))
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}
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if schema.AdditionalItems != nil && schema.AdditionalItems.Schema != nil {
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// NOTE: we keep validating values, even though additionalItems is unsupported in Swagger 2.0 (and 3.0 as well)
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res.Merge(ex.validateExampleValueSchemaAgainstSchema(fmt.Sprintf("%s.additionalItems", path), in, schema.AdditionalItems.Schema))
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}
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for propName, prop := range schema.Properties {
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res.Merge(ex.validateExampleValueSchemaAgainstSchema(path+"."+propName, in, &prop))
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}
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for propName, prop := range schema.PatternProperties {
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res.Merge(ex.validateExampleValueSchemaAgainstSchema(path+"."+propName, in, &prop))
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}
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if schema.AdditionalProperties != nil && schema.AdditionalProperties.Schema != nil {
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res.Merge(ex.validateExampleValueSchemaAgainstSchema(fmt.Sprintf("%s.additionalProperties", path), in, schema.AdditionalProperties.Schema))
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}
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if schema.AllOf != nil {
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for i, aoSch := range schema.AllOf {
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res.Merge(ex.validateExampleValueSchemaAgainstSchema(fmt.Sprintf("%s.allOf[%d]", path, i), in, &aoSch))
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}
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}
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return res
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}
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// TODO: Temporary duplicated code. Need to refactor with examples
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// nolint: dupl
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func (ex *exampleValidator) validateExampleValueItemsAgainstSchema(path, in string, root interface{}, items *spec.Items) *Result {
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res := new(Result)
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s := ex.SpecValidator
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if items != nil {
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if items.Example != nil {
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res.MergeAsWarnings(newItemsValidator(path, in, items, root, s.KnownFormats).Validate(0, items.Example))
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}
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if items.Items != nil {
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res.Merge(ex.validateExampleValueItemsAgainstSchema(path+"[0].example", in, root, items.Items))
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}
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if _, err := compileRegexp(items.Pattern); err != nil {
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res.AddErrors(invalidPatternInMsg(path, in, items.Pattern))
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}
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}
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return res
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}
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