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validation.go
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validation.go
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package httpmockserver
import (
"bytes"
"encoding/json"
"fmt"
"github.com/golang-jwt/jwt/v4"
"github.com/oliveagle/jsonpath"
"reflect"
"regexp"
"strings"
)
type RequestValidationFunc func(r *IncomingRequest) error
type requestValidation struct {
validation RequestValidationFunc
description string
satisfied bool
}
func (val *requestValidation) String() string {
return val.description
}
var (
bodyFuncValidation = func(bodyValidation func(body []byte) error) RequestValidationFunc {
return func(in *IncomingRequest) error {
if err := bodyValidation(in.Body); err != nil {
return fmt.Errorf("request validation failed: custom body validation failure: %v", err.Error())
}
return nil
}
}
bodyValidation = func(data []byte) RequestValidationFunc {
return func(in *IncomingRequest) error {
if !bytes.Equal(data, in.Body) {
return fmt.Errorf("request validation failed: body should be %v but was %v", string(data), string(in.Body))
}
return nil
}
}
stringBodyContainsValidation = func(substring string) RequestValidationFunc {
return func(in *IncomingRequest) error {
stringBody := string(in.Body)
if !strings.Contains(stringBody, substring) {
return fmt.Errorf("request validation failed: body should contain %v but was %v", substring, stringBody)
}
return nil
}
}
stringBodyMatchValidation = func(regex string) RequestValidationFunc {
return func(in *IncomingRequest) error {
stringBody := string(in.Body)
if !regexp.MustCompile(regex).MatchString(stringBody) {
return fmt.Errorf("request validation failed: body should match %v but was %v", regex, stringBody)
}
return nil
}
}
jsonBodyValidation = func(expectedJson interface{}) RequestValidationFunc {
return func(in *IncomingRequest) error {
var jsExpected []byte
var err error
if str, ok := expectedJson.(string); ok {
jsExpected = []byte(str)
} else {
jsExpected, err = json.Marshal(expectedJson)
if err != nil {
return fmt.Errorf("request validation failed: could not parse provided json body %+v: %v", expectedJson, err)
}
}
var normJsExpected map[string]interface{}
err = json.Unmarshal(jsExpected, &normJsExpected)
if err != nil {
return fmt.Errorf("request validation failed: could not parse expected json body %+v: %v", expectedJson, err)
}
var normJsActual map[string]interface{}
err = json.Unmarshal(in.Body, &normJsActual)
if err != nil {
return fmt.Errorf("request validation failed: could not parse actual json body %+v: %v", in.Body, err)
}
normStringActual, _ := json.Marshal(normJsActual)
normStringExpected, _ := json.Marshal(normJsExpected)
if !bytes.Equal(normStringActual, normStringExpected) {
return fmt.Errorf("request validation failed: json body should be %+v but was %+v", normStringExpected, normStringActual)
}
return nil
}
}
jsonPathContainsValidation = func(jsPath string, value interface{}) RequestValidationFunc {
return func(in *IncomingRequest) error {
var jsBodyObject map[string]interface{}
err := json.Unmarshal(in.Body, &jsBodyObject)
if err != nil {
return fmt.Errorf("request validation failed: could not parse json body %+v: %v", in.Body, err)
}
res, err := jsonpath.JsonPathLookup(jsBodyObject, jsPath)
if err != nil {
return fmt.Errorf("request validation failed: could not find json path %v in body %+v: %v", jsPath, in.Body, err)
}
if reflect.DeepEqual(res, value) {
return nil
}
return fmt.Errorf("request validation failed: json path %v should be %+v but was %+v", jsPath, value, res)
}
}
jsonPathMatchesValidation = func(jsPath string, regex string) RequestValidationFunc {
return func(in *IncomingRequest) error {
var jsBodyObject map[string]interface{}
err := json.Unmarshal(in.Body, &jsBodyObject)
if err != nil {
return fmt.Errorf("request validation failed: could not parse json body %+v: %v", in.Body, err)
}
res, err := jsonpath.JsonPathLookup(jsBodyObject, jsPath)
if err != nil {
return fmt.Errorf("request validation failed: could not find json path %v in body %+v: %v", jsPath, in.Body, err)
}
// stringify the result
var str = ""
str, ok := res.(string)
if !ok {
str = fmt.Sprintf("%v", res)
}
if regexp.MustCompile(regex).MatchString(str) {
return nil
}
return fmt.Errorf("request validation failed: json path %v should match %v but was %+v", jsPath, regex, res)
}
}
basicAuthValidation = func(user, password string) RequestValidationFunc {
return func(in *IncomingRequest) error {
_user, _password, ok := in.R.BasicAuth()
if !ok {
return fmt.Errorf("request validation failed: expected authHeader was missing")
}
if user != _user || password != _password {
return fmt.Errorf("request validation failed: expected authHeader user:password %v:%v but was %v:%v", user, password, _user, _password)
}
return nil
}
}
basicAuthExistsValidation = func() RequestValidationFunc {
return func(in *IncomingRequest) error {
_, _, ok := in.R.BasicAuth()
if !ok {
return fmt.Errorf("request validation failed: expected authHeader was missing")
}
return nil
}
}
jwtTokenExistsValidation = func() RequestValidationFunc {
return func(in *IncomingRequest) error {
authHeader := in.R.Header.Get("Authorization")
if authHeader == "" {
return fmt.Errorf("request validation failed: expected authHeader was missing")
}
if !strings.HasPrefix(authHeader, "Bearer ") {
return fmt.Errorf("request validation failed: Bearer prefix was missing")
}
token := strings.TrimPrefix(authHeader, "Bearer ")
if token == "" {
return fmt.Errorf("request validation failed: bearer token was empty")
}
return nil
}
}
jwtTokenClaimPathValidation = func(jsPath string, value interface{}) RequestValidationFunc {
return func(in *IncomingRequest) error {
if err := jwtTokenExistsValidation()(in); err != nil {
return err
}
token := strings.TrimPrefix(in.R.Header.Get("Authorization"), "Bearer ")
parsedToken, _ := jwt.Parse(token, func(token *jwt.Token) (interface{}, error) {
return nil, nil
})
claims, ok := parsedToken.Claims.(jwt.MapClaims)
if !ok {
return fmt.Errorf("request validation failed: could not retrieve claims from token")
}
res, err := jsonpath.JsonPathLookup(claims, jsPath)
if err != nil {
return fmt.Errorf("request validation failed: could not retrieve claim with path %s from token", jsPath)
}
if !reflect.DeepEqual(res, value) {
return fmt.Errorf("request validation failed: expected claim on path %s to be %v but was %v", jsPath, value, res)
}
return nil
}
}
pathValidation = func(path string) RequestValidationFunc {
return func(in *IncomingRequest) error {
if in.R.URL.Path != path {
return fmt.Errorf("request validation failed: expected path %v but was %v", path, in.R.URL.Path)
}
return nil
}
}
pathRegexValidation = func(pathRegex string) RequestValidationFunc {
regex := regexp.MustCompile(pathRegex)
return func(in *IncomingRequest) error {
if !regex.MatchString(in.R.URL.Path) {
return fmt.Errorf("request validation failed: pathRegex %v did not match %v", pathRegex, in.R.URL.Path)
}
return nil
}
}
headerValidation = func(key, value string) RequestValidationFunc {
return func(in *IncomingRequest) error {
if in.R.Header.Get(key) == "" {
return fmt.Errorf("request validation failed: header %v was missing", key)
}
if in.R.Header.Get(key) != value {
return fmt.Errorf("request validation failed: expected header %v to be %v but was %v", key, value, in.R.Header.Get(key))
}
return nil
}
}
headerExistsValidation = func(key string) RequestValidationFunc {
return func(in *IncomingRequest) error {
if in.R.Header.Get(key) == "" {
return fmt.Errorf("request validation failed: header %v was missing", key)
}
return nil
}
}
headerMatchesValidation = func(key, regex string) RequestValidationFunc {
return func(in *IncomingRequest) error {
if in.R.Header.Get(key) == "" {
return fmt.Errorf("request validation failed: header %v was missing", key)
}
if !regexp.MustCompile(regex).MatchString(in.R.Header.Get(key)) {
return fmt.Errorf("request validation failed: header %v did not match regex %v", key, regex)
}
return nil
}
}
formParameterValidation = func(key, value string) RequestValidationFunc {
return func(in *IncomingRequest) error {
if in.R.Form.Get(key) == "" {
return fmt.Errorf("request validation failed: form parameter %v was missing", key)
}
if in.R.Form.Get(key) != value {
return fmt.Errorf("request validation failed: expected form parameter %v to be %v but was %v", key, value, in.R.Form.Get(key))
}
return nil
}
}
formParameterExistsValidation = func(name string) RequestValidationFunc {
return func(in *IncomingRequest) error {
if in.R.Form.Get(name) == "" {
return fmt.Errorf("request validation failed: form parameter %v was missing", name)
}
return nil
}
}
formParameterMatchesValidation = func(key, regex string) RequestValidationFunc {
return func(in *IncomingRequest) error {
if in.R.Form.Get(key) == "" {
return fmt.Errorf("request validation failed: form parameter %v was missing", key)
}
if !regexp.MustCompile(regex).MatchString(in.R.Form.Get(key)) {
return fmt.Errorf("request validation failed: form parameter %v did not match regex %v", key, regex)
}
return nil
}
}
queryParameterValidation = func(key, value string) RequestValidationFunc {
return func(in *IncomingRequest) error {
if in.R.URL.Query().Get(key) == "" {
return fmt.Errorf("request validation failed: query parameter %v was missing", key)
}
if in.R.URL.Query().Get(key) != value {
return fmt.Errorf("request validation failed: expected query parameter %v to be %v but was %v", key, value, in.R.Form.Get(key))
}
return nil
}
}
queryParameterExistsValidation = func(name string) RequestValidationFunc {
return func(in *IncomingRequest) error {
if in.R.URL.Query().Get(name) == "" {
return fmt.Errorf("request validation failed: query parameter %v was missing", name)
}
return nil
}
}
queryParameterMatchesValidation = func(key, regex string) RequestValidationFunc {
return func(in *IncomingRequest) error {
if in.R.URL.Query().Get(key) == "" {
return fmt.Errorf("request validation failed: query parameter %v was missing", key)
}
if !regexp.MustCompile(regex).MatchString(in.R.Form.Get(key)) {
return fmt.Errorf("request validation failed: query parameter %v did not match regex %v", key, regex)
}
return nil
}
}
methodValidation = func(method string) RequestValidationFunc {
return func(in *IncomingRequest) error {
if !strings.EqualFold(in.R.Method, method) {
return fmt.Errorf("request validation failed: expected method %v but was %v", method, in.R.Method)
}
return nil
}
}
)