266 lines
8.7 KiB
Go
266 lines
8.7 KiB
Go
// 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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// TODO: define this as package validate/internal
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// This must be done while keeping CI intact with all tests and test coverage
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import (
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"reflect"
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"strconv"
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"strings"
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"github.com/go-openapi/errors"
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"github.com/go-openapi/spec"
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)
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const swaggerBody = "body"
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const objectType = "object"
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// Helpers available at the package level
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var (
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pathHelp *pathHelper
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valueHelp *valueHelper
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errorHelp *errorHelper
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paramHelp *paramHelper
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responseHelp *responseHelper
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)
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type errorHelper struct {
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// A collection of unexported helpers for error construction
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}
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func (h *errorHelper) sErr(err errors.Error) *Result {
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// Builds a Result from standard errors.Error
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return &Result{Errors: []error{err}}
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}
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func (h *errorHelper) addPointerError(res *Result, err error, ref string, fromPath string) *Result {
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// Provides more context on error messages
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// reported by the jsoinpointer package by altering the passed Result
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if err != nil {
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res.AddErrors(cannotResolveRefMsg(fromPath, ref, err))
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}
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return res
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}
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type pathHelper struct {
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// A collection of unexported helpers for path validation
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}
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func (h *pathHelper) stripParametersInPath(path string) string {
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// Returns a path stripped from all path parameters, with multiple or trailing slashes removed.
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//
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// Stripping is performed on a slash-separated basis, e.g '/a{/b}' remains a{/b} and not /a.
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// - Trailing "/" make a difference, e.g. /a/ !~ /a (ex: canary/bitbucket.org/swagger.json)
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// - presence or absence of a parameter makes a difference, e.g. /a/{log} !~ /a/ (ex: canary/kubernetes/swagger.json)
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// Regexp to extract parameters from path, with surrounding {}.
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// NOTE: important non-greedy modifier
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rexParsePathParam := mustCompileRegexp(`{[^{}]+?}`)
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strippedSegments := []string{}
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for _, segment := range strings.Split(path, "/") {
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strippedSegments = append(strippedSegments, rexParsePathParam.ReplaceAllString(segment, "X"))
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}
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return strings.Join(strippedSegments, "/")
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}
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func (h *pathHelper) extractPathParams(path string) (params []string) {
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// Extracts all params from a path, with surrounding "{}"
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rexParsePathParam := mustCompileRegexp(`{[^{}]+?}`)
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for _, segment := range strings.Split(path, "/") {
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for _, v := range rexParsePathParam.FindAllStringSubmatch(segment, -1) {
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params = append(params, v...)
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}
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}
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return
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}
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type valueHelper struct {
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// A collection of unexported helpers for value validation
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}
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func (h *valueHelper) asInt64(val interface{}) int64 {
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// Number conversion function for int64, without error checking
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// (implements an implicit type upgrade).
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v := reflect.ValueOf(val)
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switch v.Kind() {
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case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
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return v.Int()
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case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
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return int64(v.Uint())
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case reflect.Float32, reflect.Float64:
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return int64(v.Float())
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default:
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//panic("Non numeric value in asInt64()")
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return 0
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}
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}
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func (h *valueHelper) asUint64(val interface{}) uint64 {
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// Number conversion function for uint64, without error checking
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// (implements an implicit type upgrade).
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v := reflect.ValueOf(val)
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switch v.Kind() {
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case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
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return uint64(v.Int())
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case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
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return v.Uint()
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case reflect.Float32, reflect.Float64:
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return uint64(v.Float())
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default:
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//panic("Non numeric value in asUint64()")
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return 0
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}
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}
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// Same for unsigned floats
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func (h *valueHelper) asFloat64(val interface{}) float64 {
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// Number conversion function for float64, without error checking
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// (implements an implicit type upgrade).
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v := reflect.ValueOf(val)
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switch v.Kind() {
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case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
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return float64(v.Int())
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case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
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return float64(v.Uint())
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case reflect.Float32, reflect.Float64:
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return v.Float()
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default:
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//panic("Non numeric value in asFloat64()")
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return 0
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}
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}
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type paramHelper struct {
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// A collection of unexported helpers for parameters resolution
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}
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func (h *paramHelper) safeExpandedParamsFor(path, method, operationID string, res *Result, s *SpecValidator) (params []spec.Parameter) {
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operation, ok := s.analyzer.OperationFor(method, path)
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if ok {
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// expand parameters first if necessary
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resolvedParams := []spec.Parameter{}
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for _, ppr := range operation.Parameters {
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resolvedParam, red := h.resolveParam(path, method, operationID, &ppr, s)
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res.Merge(red)
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if resolvedParam != nil {
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resolvedParams = append(resolvedParams, *resolvedParam)
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}
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}
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// remove params with invalid expansion from Slice
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operation.Parameters = resolvedParams
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for _, ppr := range s.analyzer.SafeParamsFor(method, path,
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func(p spec.Parameter, err error) bool {
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// since params have already been expanded, there are few causes for error
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res.AddErrors(someParametersBrokenMsg(path, method, operationID))
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// original error from analyzer
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res.AddErrors(err)
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return true
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}) {
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params = append(params, ppr)
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}
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}
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return
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}
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func (h *paramHelper) resolveParam(path, method, operationID string, param *spec.Parameter, s *SpecValidator) (*spec.Parameter, *Result) {
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// Ensure parameter is expanded
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var err error
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res := new(Result)
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isRef := param.Ref.String() != ""
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if s.spec.SpecFilePath() == "" {
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err = spec.ExpandParameterWithRoot(param, s.spec.Spec(), nil)
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} else {
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err = spec.ExpandParameter(param, s.spec.SpecFilePath())
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}
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if err != nil { // Safeguard
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// NOTE: we may enter enter here when the whole parameter is an unresolved $ref
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refPath := strings.Join([]string{"\"" + path + "\"", method}, ".")
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errorHelp.addPointerError(res, err, param.Ref.String(), refPath)
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return nil, res
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}
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res.Merge(h.checkExpandedParam(param, param.Name, param.In, operationID, isRef))
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return param, res
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}
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func (h *paramHelper) checkExpandedParam(pr *spec.Parameter, path, in, operation string, isRef bool) *Result {
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// Secure parameter structure after $ref resolution
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res := new(Result)
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simpleZero := spec.SimpleSchema{}
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// Try to explain why... best guess
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if pr.In == swaggerBody && (pr.SimpleSchema != simpleZero && pr.SimpleSchema.Type != objectType) {
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if isRef {
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// Most likely, a $ref with a sibling is an unwanted situation: in itself this is a warning...
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// but we detect it because of the following error:
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// schema took over Parameter for an unexplained reason
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res.AddWarnings(refShouldNotHaveSiblingsMsg(path, operation))
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}
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res.AddErrors(invalidParameterDefinitionMsg(path, in, operation))
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} else if pr.In != swaggerBody && pr.Schema != nil {
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if isRef {
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res.AddWarnings(refShouldNotHaveSiblingsMsg(path, operation))
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}
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res.AddErrors(invalidParameterDefinitionAsSchemaMsg(path, in, operation))
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} else if (pr.In == swaggerBody && pr.Schema == nil) ||
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(pr.In != swaggerBody && pr.SimpleSchema == simpleZero) { // Safeguard
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// Other unexpected mishaps
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res.AddErrors(invalidParameterDefinitionMsg(path, in, operation))
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}
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return res
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}
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type responseHelper struct {
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// A collection of unexported helpers for response resolution
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}
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func (r *responseHelper) expandResponseRef(
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response *spec.Response,
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path string, s *SpecValidator) (*spec.Response, *Result) {
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// Ensure response is expanded
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var err error
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res := new(Result)
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if s.spec.SpecFilePath() == "" {
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// there is no physical document to resolve $ref in response
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err = spec.ExpandResponseWithRoot(response, s.spec.Spec(), nil)
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} else {
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err = spec.ExpandResponse(response, s.spec.SpecFilePath())
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}
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if err != nil { // Safeguard
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// NOTE: we may enter here when the whole response is an unresolved $ref.
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errorHelp.addPointerError(res, err, response.Ref.String(), path)
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return nil, res
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}
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return response, res
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}
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func (r *responseHelper) responseMsgVariants(
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responseType string,
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responseCode int) (responseName, responseCodeAsStr string) {
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// Path variants for messages
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if responseType == "default" {
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responseCodeAsStr = "default"
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responseName = "default response"
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} else {
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responseCodeAsStr = strconv.Itoa(responseCode)
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responseName = "response " + responseCodeAsStr
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}
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return
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}
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