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Added all required dependencies

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Apache License
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http://www.apache.org/licenses/
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# binding [![Build Status](https://travis-ci.org/go-macaron/binding.svg?branch=master)](https://travis-ci.org/go-macaron/binding) [![](http://gocover.io/_badge/github.com/go-macaron/binding)](http://gocover.io/github.com/go-macaron/binding)
Middleware binding provides request data binding and validation for [Macaron](https://github.com/go-macaron/macaron).
### Installation
go get github.com/go-macaron/binding
## Getting Help
- [API Reference](https://gowalker.org/github.com/go-macaron/binding)
- [Documentation](http://go-macaron.com/docs/middlewares/binding)
## Credits
This package is a modified version of [martini-contrib/binding](https://github.com/martini-contrib/binding).
## License
This project is under the Apache License, Version 2.0. See the [LICENSE](LICENSE) file for the full license text.

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// Copyright 2014 Martini Authors
// Copyright 2014 The Macaron Authors
//
// Licensed under the Apache License, Version 2.0 (the "License"): you may
// not use this file except in compliance with the License. You may obtain
// a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
// License for the specific language governing permissions and limitations
// under the License.
// Package binding is a middleware that provides request data binding and validation for Macaron.
package binding
import (
"encoding/json"
"fmt"
"io"
"mime/multipart"
"net/http"
"reflect"
"regexp"
"strconv"
"strings"
"unicode/utf8"
"github.com/Unknwon/com"
"gopkg.in/macaron.v1"
)
const _VERSION = "0.3.2"
func Version() string {
return _VERSION
}
func bind(ctx *macaron.Context, obj interface{}, ifacePtr ...interface{}) {
contentType := ctx.Req.Header.Get("Content-Type")
if ctx.Req.Method == "POST" || ctx.Req.Method == "PUT" || len(contentType) > 0 {
switch {
case strings.Contains(contentType, "form-urlencoded"):
ctx.Invoke(Form(obj, ifacePtr...))
case strings.Contains(contentType, "multipart/form-data"):
ctx.Invoke(MultipartForm(obj, ifacePtr...))
case strings.Contains(contentType, "json"):
ctx.Invoke(Json(obj, ifacePtr...))
default:
var errors Errors
if contentType == "" {
errors.Add([]string{}, ERR_CONTENT_TYPE, "Empty Content-Type")
} else {
errors.Add([]string{}, ERR_CONTENT_TYPE, "Unsupported Content-Type")
}
ctx.Map(errors)
ctx.Map(obj) // Map a fake struct so handler won't panic.
}
} else {
ctx.Invoke(Form(obj, ifacePtr...))
}
}
const (
_JSON_CONTENT_TYPE = "application/json; charset=utf-8"
STATUS_UNPROCESSABLE_ENTITY = 422
)
// errorHandler simply counts the number of errors in the
// context and, if more than 0, writes a response with an
// error code and a JSON payload describing the errors.
// The response will have a JSON content-type.
// Middleware remaining on the stack will not even see the request
// if, by this point, there are any errors.
// This is a "default" handler, of sorts, and you are
// welcome to use your own instead. The Bind middleware
// invokes this automatically for convenience.
func errorHandler(errs Errors, rw http.ResponseWriter) {
if len(errs) > 0 {
rw.Header().Set("Content-Type", _JSON_CONTENT_TYPE)
if errs.Has(ERR_DESERIALIZATION) {
rw.WriteHeader(http.StatusBadRequest)
} else if errs.Has(ERR_CONTENT_TYPE) {
rw.WriteHeader(http.StatusUnsupportedMediaType)
} else {
rw.WriteHeader(STATUS_UNPROCESSABLE_ENTITY)
}
errOutput, _ := json.Marshal(errs)
rw.Write(errOutput)
return
}
}
// Bind wraps up the functionality of the Form and Json middleware
// according to the Content-Type and verb of the request.
// A Content-Type is required for POST and PUT requests.
// Bind invokes the ErrorHandler middleware to bail out if errors
// occurred. If you want to perform your own error handling, use
// Form or Json middleware directly. An interface pointer can
// be added as a second argument in order to map the struct to
// a specific interface.
func Bind(obj interface{}, ifacePtr ...interface{}) macaron.Handler {
return func(ctx *macaron.Context) {
bind(ctx, obj, ifacePtr...)
if handler, ok := obj.(ErrorHandler); ok {
ctx.Invoke(handler.Error)
} else {
ctx.Invoke(errorHandler)
}
}
}
// BindIgnErr will do the exactly same thing as Bind but without any
// error handling, which user has freedom to deal with them.
// This allows user take advantages of validation.
func BindIgnErr(obj interface{}, ifacePtr ...interface{}) macaron.Handler {
return func(ctx *macaron.Context) {
bind(ctx, obj, ifacePtr...)
}
}
// Form is middleware to deserialize form-urlencoded data from the request.
// It gets data from the form-urlencoded body, if present, or from the
// query string. It uses the http.Request.ParseForm() method
// to perform deserialization, then reflection is used to map each field
// into the struct with the proper type. Structs with primitive slice types
// (bool, float, int, string) can support deserialization of repeated form
// keys, for example: key=val1&key=val2&key=val3
// An interface pointer can be added as a second argument in order
// to map the struct to a specific interface.
func Form(formStruct interface{}, ifacePtr ...interface{}) macaron.Handler {
return func(ctx *macaron.Context) {
var errors Errors
ensureNotPointer(formStruct)
formStruct := reflect.New(reflect.TypeOf(formStruct))
parseErr := ctx.Req.ParseForm()
// Format validation of the request body or the URL would add considerable overhead,
// and ParseForm does not complain when URL encoding is off.
// Because an empty request body or url can also mean absence of all needed values,
// it is not in all cases a bad request, so let's return 422.
if parseErr != nil {
errors.Add([]string{}, ERR_DESERIALIZATION, parseErr.Error())
}
mapForm(formStruct, ctx.Req.Form, nil, errors)
validateAndMap(formStruct, ctx, errors, ifacePtr...)
}
}
// Maximum amount of memory to use when parsing a multipart form.
// Set this to whatever value you prefer; default is 10 MB.
var MaxMemory = int64(1024 * 1024 * 10)
// MultipartForm works much like Form, except it can parse multipart forms
// and handle file uploads. Like the other deserialization middleware handlers,
// you can pass in an interface to make the interface available for injection
// into other handlers later.
func MultipartForm(formStruct interface{}, ifacePtr ...interface{}) macaron.Handler {
return func(ctx *macaron.Context) {
var errors Errors
ensureNotPointer(formStruct)
formStruct := reflect.New(reflect.TypeOf(formStruct))
// This if check is necessary due to https://github.com/martini-contrib/csrf/issues/6
if ctx.Req.MultipartForm == nil {
// Workaround for multipart forms returning nil instead of an error
// when content is not multipart; see https://code.google.com/p/go/issues/detail?id=6334
if multipartReader, err := ctx.Req.MultipartReader(); err != nil {
errors.Add([]string{}, ERR_DESERIALIZATION, err.Error())
} else {
form, parseErr := multipartReader.ReadForm(MaxMemory)
if parseErr != nil {
errors.Add([]string{}, ERR_DESERIALIZATION, parseErr.Error())
}
if ctx.Req.Form == nil {
ctx.Req.ParseForm()
}
for k, v := range form.Value {
ctx.Req.Form[k] = append(ctx.Req.Form[k], v...)
}
ctx.Req.MultipartForm = form
}
}
mapForm(formStruct, ctx.Req.MultipartForm.Value, ctx.Req.MultipartForm.File, errors)
validateAndMap(formStruct, ctx, errors, ifacePtr...)
}
}
// Json is middleware to deserialize a JSON payload from the request
// into the struct that is passed in. The resulting struct is then
// validated, but no error handling is actually performed here.
// An interface pointer can be added as a second argument in order
// to map the struct to a specific interface.
func Json(jsonStruct interface{}, ifacePtr ...interface{}) macaron.Handler {
return func(ctx *macaron.Context) {
var errors Errors
ensureNotPointer(jsonStruct)
jsonStruct := reflect.New(reflect.TypeOf(jsonStruct))
if ctx.Req.Request.Body != nil {
defer ctx.Req.Request.Body.Close()
err := json.NewDecoder(ctx.Req.Request.Body).Decode(jsonStruct.Interface())
if err != nil && err != io.EOF {
errors.Add([]string{}, ERR_DESERIALIZATION, err.Error())
}
}
validateAndMap(jsonStruct, ctx, errors, ifacePtr...)
}
}
// Validate is middleware to enforce required fields. If the struct
// passed in implements Validator, then the user-defined Validate method
// is executed, and its errors are mapped to the context. This middleware
// performs no error handling: it merely detects errors and maps them.
func Validate(obj interface{}) macaron.Handler {
return func(ctx *macaron.Context) {
var errors Errors
v := reflect.ValueOf(obj)
k := v.Kind()
if k == reflect.Interface || k == reflect.Ptr {
v = v.Elem()
k = v.Kind()
}
if k == reflect.Slice || k == reflect.Array {
for i := 0; i < v.Len(); i++ {
e := v.Index(i).Interface()
errors = validateStruct(errors, e)
if validator, ok := e.(Validator); ok {
errors = validator.Validate(ctx, errors)
}
}
} else {
errors = validateStruct(errors, obj)
if validator, ok := obj.(Validator); ok {
errors = validator.Validate(ctx, errors)
}
}
ctx.Map(errors)
}
}
var (
AlphaDashPattern = regexp.MustCompile("[^\\d\\w-_]")
AlphaDashDotPattern = regexp.MustCompile("[^\\d\\w-_\\.]")
EmailPattern = regexp.MustCompile("[\\w!#$%&'*+/=?^_`{|}~-]+(?:\\.[\\w!#$%&'*+/=?^_`{|}~-]+)*@(?:[\\w](?:[\\w-]*[\\w])?\\.)+[a-zA-Z0-9](?:[\\w-]*[\\w])?")
URLPattern = regexp.MustCompile(`(http|https):\/\/(?:\\S+(?::\\S*)?@)?[\w\-_]+(\.[\w\-_]+)*([\w\-\.,@?^=%&amp;:/~\+#]*[\w\-\@?^=%&amp;/~\+#])?`)
)
type (
// Rule represents a validation rule.
Rule struct {
// IsMatch checks if rule matches.
IsMatch func(string) bool
// IsValid applies validation rule to condition.
IsValid func(Errors, string, interface{}) (bool, Errors)
}
// RuleMapper represents a validation rule mapper,
// it allwos users to add custom validation rules.
RuleMapper []*Rule
)
var ruleMapper RuleMapper
// AddRule adds new validation rule.
func AddRule(r *Rule) {
ruleMapper = append(ruleMapper, r)
}
func in(fieldValue interface{}, arr string) bool {
val := fmt.Sprintf("%v", fieldValue)
vals := strings.Split(arr, ",")
isIn := false
for _, v := range vals {
if v == val {
isIn = true
break
}
}
return isIn
}
func parseFormName(raw, actual string) string {
if len(actual) > 0 {
return actual
}
return nameMapper(raw)
}
// Performs required field checking on a struct
func validateStruct(errors Errors, obj interface{}) Errors {
typ := reflect.TypeOf(obj)
val := reflect.ValueOf(obj)
if typ.Kind() == reflect.Ptr {
typ = typ.Elem()
val = val.Elem()
}
for i := 0; i < typ.NumField(); i++ {
field := typ.Field(i)
// Allow ignored fields in the struct
if field.Tag.Get("form") == "-" || !val.Field(i).CanInterface() {
continue
}
fieldVal := val.Field(i)
fieldValue := fieldVal.Interface()
zero := reflect.Zero(field.Type).Interface()
// Validate nested and embedded structs (if pointer, only do so if not nil)
if field.Type.Kind() == reflect.Struct ||
(field.Type.Kind() == reflect.Ptr && !reflect.DeepEqual(zero, fieldValue) &&
field.Type.Elem().Kind() == reflect.Struct) {
errors = validateStruct(errors, fieldValue)
}
errors = validateField(errors, zero, field, fieldVal, fieldValue)
}
return errors
}
func validateField(errors Errors, zero interface{}, field reflect.StructField, fieldVal reflect.Value, fieldValue interface{}) Errors {
if fieldVal.Kind() == reflect.Slice {
for i := 0; i < fieldVal.Len(); i++ {
sliceVal := fieldVal.Index(i)
if sliceVal.Kind() == reflect.Ptr {
sliceVal = sliceVal.Elem()
}
sliceValue := sliceVal.Interface()
zero := reflect.Zero(sliceVal.Type()).Interface()
if sliceVal.Kind() == reflect.Struct ||
(sliceVal.Kind() == reflect.Ptr && !reflect.DeepEqual(zero, sliceValue) &&
sliceVal.Elem().Kind() == reflect.Struct) {
errors = validateStruct(errors, sliceValue)
}
/* Apply validation rules to each item in a slice. ISSUE #3
else {
errors = validateField(errors, zero, field, sliceVal, sliceValue)
}*/
}
}
VALIDATE_RULES:
for _, rule := range strings.Split(field.Tag.Get("binding"), ";") {
if len(rule) == 0 {
continue
}
switch {
case rule == "OmitEmpty":
if reflect.DeepEqual(zero, fieldValue) {
break VALIDATE_RULES
}
case rule == "Required":
if reflect.DeepEqual(zero, fieldValue) {
errors.Add([]string{field.Name}, ERR_REQUIRED, "Required")
break VALIDATE_RULES
}
case rule == "AlphaDash":
if AlphaDashPattern.MatchString(fmt.Sprintf("%v", fieldValue)) {
errors.Add([]string{field.Name}, ERR_ALPHA_DASH, "AlphaDash")
break VALIDATE_RULES
}
case rule == "AlphaDashDot":
if AlphaDashDotPattern.MatchString(fmt.Sprintf("%v", fieldValue)) {
errors.Add([]string{field.Name}, ERR_ALPHA_DASH_DOT, "AlphaDashDot")
break VALIDATE_RULES
}
case strings.HasPrefix(rule, "Size("):
size, _ := strconv.Atoi(rule[5 : len(rule)-1])
if str, ok := fieldValue.(string); ok && utf8.RuneCountInString(str) != size {
errors.Add([]string{field.Name}, ERR_SIZE, "Size")
break VALIDATE_RULES
}
v := reflect.ValueOf(fieldValue)
if v.Kind() == reflect.Slice && v.Len() != size {
errors.Add([]string{field.Name}, ERR_SIZE, "Size")
break VALIDATE_RULES
}
case strings.HasPrefix(rule, "MinSize("):
min, _ := strconv.Atoi(rule[8 : len(rule)-1])
if str, ok := fieldValue.(string); ok && utf8.RuneCountInString(str) < min {
errors.Add([]string{field.Name}, ERR_MIN_SIZE, "MinSize")
break VALIDATE_RULES
}
v := reflect.ValueOf(fieldValue)
if v.Kind() == reflect.Slice && v.Len() < min {
errors.Add([]string{field.Name}, ERR_MIN_SIZE, "MinSize")
break VALIDATE_RULES
}
case strings.HasPrefix(rule, "MaxSize("):
max, _ := strconv.Atoi(rule[8 : len(rule)-1])
if str, ok := fieldValue.(string); ok && utf8.RuneCountInString(str) > max {
errors.Add([]string{field.Name}, ERR_MAX_SIZE, "MaxSize")
break VALIDATE_RULES
}
v := reflect.ValueOf(fieldValue)
if v.Kind() == reflect.Slice && v.Len() > max {
errors.Add([]string{field.Name}, ERR_MAX_SIZE, "MaxSize")
break VALIDATE_RULES
}
case strings.HasPrefix(rule, "Range("):
nums := strings.Split(rule[6:len(rule)-1], ",")
if len(nums) != 2 {
break VALIDATE_RULES
}
val := com.StrTo(fmt.Sprintf("%v", fieldValue)).MustInt()
if val < com.StrTo(nums[0]).MustInt() || val > com.StrTo(nums[1]).MustInt() {
errors.Add([]string{field.Name}, ERR_RANGE, "Range")
break VALIDATE_RULES
}
case rule == "Email":
if !EmailPattern.MatchString(fmt.Sprintf("%v", fieldValue)) {
errors.Add([]string{field.Name}, ERR_EMAIL, "Email")
break VALIDATE_RULES
}
case rule == "Url":
str := fmt.Sprintf("%v", fieldValue)
if len(str) == 0 {
continue
} else if !URLPattern.MatchString(str) {
errors.Add([]string{field.Name}, ERR_URL, "Url")
break VALIDATE_RULES
}
case strings.HasPrefix(rule, "In("):
if !in(fieldValue, rule[3:len(rule)-1]) {
errors.Add([]string{field.Name}, ERR_IN, "In")
break VALIDATE_RULES
}
case strings.HasPrefix(rule, "NotIn("):
if in(fieldValue, rule[6:len(rule)-1]) {
errors.Add([]string{field.Name}, ERR_NOT_INT, "NotIn")
break VALIDATE_RULES
}
case strings.HasPrefix(rule, "Include("):
if !strings.Contains(fmt.Sprintf("%v", fieldValue), rule[8:len(rule)-1]) {
errors.Add([]string{field.Name}, ERR_INCLUDE, "Include")
break VALIDATE_RULES
}
case strings.HasPrefix(rule, "Exclude("):
if strings.Contains(fmt.Sprintf("%v", fieldValue), rule[8:len(rule)-1]) {
errors.Add([]string{field.Name}, ERR_EXCLUDE, "Exclude")
break VALIDATE_RULES
}
case strings.HasPrefix(rule, "Default("):
if reflect.DeepEqual(zero, fieldValue) {
if fieldVal.CanAddr() {
setWithProperType(field.Type.Kind(), rule[8:len(rule)-1], fieldVal, field.Tag.Get("form"), errors)
} else {
errors.Add([]string{field.Name}, ERR_EXCLUDE, "Default")
break VALIDATE_RULES
}
}
default:
// Apply custom validation rules.
var isValid bool
for i := range ruleMapper {
if ruleMapper[i].IsMatch(rule) {
isValid, errors = ruleMapper[i].IsValid(errors, field.Name, fieldValue)
if !isValid {
break VALIDATE_RULES
}
}
}
}
}
return errors
}
// NameMapper represents a form tag name mapper.
type NameMapper func(string) string
var (
nameMapper = func(field string) string {
newstr := make([]rune, 0, len(field))
for i, chr := range field {
if isUpper := 'A' <= chr && chr <= 'Z'; isUpper {
if i > 0 {
newstr = append(newstr, '_')
}
chr -= ('A' - 'a')
}
newstr = append(newstr, chr)
}
return string(newstr)
}
)
// SetNameMapper sets name mapper.
func SetNameMapper(nm NameMapper) {
nameMapper = nm
}
// Takes values from the form data and puts them into a struct
func mapForm(formStruct reflect.Value, form map[string][]string,
formfile map[string][]*multipart.FileHeader, errors Errors) {
if formStruct.Kind() == reflect.Ptr {
formStruct = formStruct.Elem()
}
typ := formStruct.Type()
for i := 0; i < typ.NumField(); i++ {
typeField := typ.Field(i)
structField := formStruct.Field(i)
if typeField.Type.Kind() == reflect.Ptr && typeField.Anonymous {
structField.Set(reflect.New(typeField.Type.Elem()))
mapForm(structField.Elem(), form, formfile, errors)
if reflect.DeepEqual(structField.Elem().Interface(), reflect.Zero(structField.Elem().Type()).Interface()) {
structField.Set(reflect.Zero(structField.Type()))
}
} else if typeField.Type.Kind() == reflect.Struct {
mapForm(structField, form, formfile, errors)
}
inputFieldName := parseFormName(typeField.Name, typeField.Tag.Get("form"))
if len(inputFieldName) == 0 || !structField.CanSet() {
continue
}
inputValue, exists := form[inputFieldName]
if exists {
numElems := len(inputValue)
if structField.Kind() == reflect.Slice && numElems > 0 {
sliceOf := structField.Type().Elem().Kind()
slice := reflect.MakeSlice(structField.Type(), numElems, numElems)
for i := 0; i < numElems; i++ {
setWithProperType(sliceOf, inputValue[i], slice.Index(i), inputFieldName, errors)
}
formStruct.Field(i).Set(slice)
} else {
setWithProperType(typeField.Type.Kind(), inputValue[0], structField, inputFieldName, errors)
}
continue
}
inputFile, exists := formfile[inputFieldName]
if !exists {
continue
}
fhType := reflect.TypeOf((*multipart.FileHeader)(nil))
numElems := len(inputFile)
if structField.Kind() == reflect.Slice && numElems > 0 && structField.Type().Elem() == fhType {
slice := reflect.MakeSlice(structField.Type(), numElems, numElems)
for i := 0; i < numElems; i++ {
slice.Index(i).Set(reflect.ValueOf(inputFile[i]))
}
structField.Set(slice)
} else if structField.Type() == fhType {
structField.Set(reflect.ValueOf(inputFile[0]))
}
}
}
// This sets the value in a struct of an indeterminate type to the
// matching value from the request (via Form middleware) in the
// same type, so that not all deserialized values have to be strings.
// Supported types are string, int, float, and bool.
func setWithProperType(valueKind reflect.Kind, val string, structField reflect.Value, nameInTag string, errors Errors) {
switch valueKind {
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
if val == "" {
val = "0"
}
intVal, err := strconv.ParseInt(val, 10, 64)
if err != nil {
errors.Add([]string{nameInTag}, ERR_INTERGER_TYPE, "Value could not be parsed as integer")
} else {
structField.SetInt(intVal)
}
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
if val == "" {
val = "0"
}
uintVal, err := strconv.ParseUint(val, 10, 64)
if err != nil {
errors.Add([]string{nameInTag}, ERR_INTERGER_TYPE, "Value could not be parsed as unsigned integer")
} else {
structField.SetUint(uintVal)
}
case reflect.Bool:
if val == "on" {
structField.SetBool(true)
return
}
if val == "" {
val = "false"
}
boolVal, err := strconv.ParseBool(val)
if err != nil {
errors.Add([]string{nameInTag}, ERR_BOOLEAN_TYPE, "Value could not be parsed as boolean")
} else if boolVal {
structField.SetBool(true)
}
case reflect.Float32:
if val == "" {
val = "0.0"
}
floatVal, err := strconv.ParseFloat(val, 32)
if err != nil {
errors.Add([]string{nameInTag}, ERR_FLOAT_TYPE, "Value could not be parsed as 32-bit float")
} else {
structField.SetFloat(floatVal)
}
case reflect.Float64:
if val == "" {
val = "0.0"
}
floatVal, err := strconv.ParseFloat(val, 64)
if err != nil {
errors.Add([]string{nameInTag}, ERR_FLOAT_TYPE, "Value could not be parsed as 64-bit float")
} else {
structField.SetFloat(floatVal)
}
case reflect.String:
structField.SetString(val)
}
}
// Don't pass in pointers to bind to. Can lead to bugs.
func ensureNotPointer(obj interface{}) {
if reflect.TypeOf(obj).Kind() == reflect.Ptr {
panic("Pointers are not accepted as binding models")
}
}
// Performs validation and combines errors from validation
// with errors from deserialization, then maps both the
// resulting struct and the errors to the context.
func validateAndMap(obj reflect.Value, ctx *macaron.Context, errors Errors, ifacePtr ...interface{}) {
ctx.Invoke(Validate(obj.Interface()))
errors = append(errors, getErrors(ctx)...)
ctx.Map(errors)
ctx.Map(obj.Elem().Interface())
if len(ifacePtr) > 0 {
ctx.MapTo(obj.Elem().Interface(), ifacePtr[0])
}
}
// getErrors simply gets the errors from the context (it's kind of a chore)
func getErrors(ctx *macaron.Context) Errors {
return ctx.GetVal(reflect.TypeOf(Errors{})).Interface().(Errors)
}
type (
// ErrorHandler is the interface that has custom error handling process.
ErrorHandler interface {
// Error handles validation errors with custom process.
Error(*macaron.Context, Errors)
}
// Validator is the interface that handles some rudimentary
// request validation logic so your application doesn't have to.
Validator interface {
// Validate validates that the request is OK. It is recommended
// that validation be limited to checking values for syntax and
// semantics, enough to know that you can make sense of the request
// in your application. For example, you might verify that a credit
// card number matches a valid pattern, but you probably wouldn't
// perform an actual credit card authorization here.
Validate(*macaron.Context, Errors) Errors
}
)

159
vendor/github.com/go-macaron/binding/errors.go generated vendored Normal file
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@ -0,0 +1,159 @@
// Copyright 2014 Martini Authors
// Copyright 2014 The Macaron Authors
//
// Licensed under the Apache License, Version 2.0 (the "License"): you may
// not use this file except in compliance with the License. You may obtain
// a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
// License for the specific language governing permissions and limitations
// under the License.
package binding
const (
// Type mismatch errors.
ERR_CONTENT_TYPE = "ContentTypeError"
ERR_DESERIALIZATION = "DeserializationError"
ERR_INTERGER_TYPE = "IntegerTypeError"
ERR_BOOLEAN_TYPE = "BooleanTypeError"
ERR_FLOAT_TYPE = "FloatTypeError"
// Validation errors.
ERR_REQUIRED = "RequiredError"
ERR_ALPHA_DASH = "AlphaDashError"
ERR_ALPHA_DASH_DOT = "AlphaDashDotError"
ERR_SIZE = "SizeError"
ERR_MIN_SIZE = "MinSizeError"
ERR_MAX_SIZE = "MaxSizeError"
ERR_RANGE = "RangeError"
ERR_EMAIL = "EmailError"
ERR_URL = "UrlError"
ERR_IN = "InError"
ERR_NOT_INT = "NotInError"
ERR_INCLUDE = "IncludeError"
ERR_EXCLUDE = "ExcludeError"
ERR_DEFAULT = "DefaultError"
)
type (
// Errors may be generated during deserialization, binding,
// or validation. This type is mapped to the context so you
// can inject it into your own handlers and use it in your
// application if you want all your errors to look the same.
Errors []Error
Error struct {
// An error supports zero or more field names, because an
// error can morph three ways: (1) it can indicate something
// wrong with the request as a whole, (2) it can point to a
// specific problem with a particular input field, or (3) it
// can span multiple related input fields.
FieldNames []string `json:"fieldNames,omitempty"`
// The classification is like an error code, convenient to
// use when processing or categorizing an error programmatically.
// It may also be called the "kind" of error.
Classification string `json:"classification,omitempty"`
// Message should be human-readable and detailed enough to
// pinpoint and resolve the problem, but it should be brief. For
// example, a payload of 100 objects in a JSON array might have
// an error in the 41st object. The message should help the
// end user find and fix the error with their request.
Message string `json:"message,omitempty"`
}
)
// Add adds an error associated with the fields indicated
// by fieldNames, with the given classification and message.
func (e *Errors) Add(fieldNames []string, classification, message string) {
*e = append(*e, Error{
FieldNames: fieldNames,
Classification: classification,
Message: message,
})
}
// Len returns the number of errors.
func (e *Errors) Len() int {
return len(*e)
}
// Has determines whether an Errors slice has an Error with
// a given classification in it; it does not search on messages
// or field names.
func (e *Errors) Has(class string) bool {
for _, err := range *e {
if err.Kind() == class {
return true
}
}
return false
}
/*
// WithClass gets a copy of errors that are classified by the
// the given classification.
func (e *Errors) WithClass(classification string) Errors {
var errs Errors
for _, err := range *e {
if err.Kind() == classification {
errs = append(errs, err)
}
}
return errs
}
// ForField gets a copy of errors that are associated with the
// field by the given name.
func (e *Errors) ForField(name string) Errors {
var errs Errors
for _, err := range *e {
for _, fieldName := range err.Fields() {
if fieldName == name {
errs = append(errs, err)
break
}
}
}
return errs
}
// Get gets errors of a particular class for the specified
// field name.
func (e *Errors) Get(class, fieldName string) Errors {
var errs Errors
for _, err := range *e {
if err.Kind() == class {
for _, nameOfField := range err.Fields() {
if nameOfField == fieldName {
errs = append(errs, err)
break
}
}
}
}
return errs
}
*/
// Fields returns the list of field names this error is
// associated with.
func (e Error) Fields() []string {
return e.FieldNames
}
// Kind returns this error's classification.
func (e Error) Kind() string {
return e.Classification
}
// Error returns this error's message.
func (e Error) Error() string {
return e.Message
}