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Use binding middleware

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This commit is contained in:
Unknwon 2014-10-15 11:19:20 -04:00
parent ecf3eb4307
commit fa241efa6d
11 changed files with 89 additions and 577 deletions
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1
.gopmfile
View File

@ -16,6 +16,7 @@ github.com/go-xorm/xorm = commit:2d8b3135b1
github.com/gogits/gfm = commit:40f747a9c0
github.com/gogits/oauth2 = commit:99cbec870a
github.com/lib/pq = commit:b021d0ef20
github.com/macaron-contrib/binding =
github.com/macaron-contrib/cache =
github.com/macaron-contrib/captcha = commit:d37d37eeea
github.com/macaron-contrib/csrf =

2
cmd/web.go
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@ -15,6 +15,7 @@ import (
"github.com/Unknwon/macaron"
"github.com/codegangsta/cli"
"github.com/macaron-contrib/binding"
"github.com/macaron-contrib/cache"
"github.com/macaron-contrib/captcha"
"github.com/macaron-contrib/csrf"
@ -30,7 +31,6 @@ import (
"github.com/gogits/gogs/modules/git"
"github.com/gogits/gogs/modules/log"
"github.com/gogits/gogs/modules/middleware"
"github.com/gogits/gogs/modules/middleware/binding"
"github.com/gogits/gogs/modules/setting"
"github.com/gogits/gogs/routers"
"github.com/gogits/gogs/routers/admin"

7
modules/auth/admin.go
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@ -6,9 +6,8 @@ package auth
import (
"github.com/Unknwon/macaron"
"github.com/macaron-contrib/i18n"
"github.com/gogits/gogs/modules/middleware/binding"
"github.com/macaron-contrib/binding"
)
type AdminEditUserForm struct {
@ -22,6 +21,6 @@ type AdminEditUserForm struct {
LoginType int `form:"login_type"`
}
func (f *AdminEditUserForm) Validate(ctx *macaron.Context, errs *binding.Errors, l i18n.Locale) {
validate(errs, ctx.Data, f, l)
func (f *AdminEditUserForm) Validate(ctx *macaron.Context, errs binding.Errors) binding.Errors {
return validate(errs, ctx.Data, f, ctx.Locale)
}

42
modules/auth/apiv1/miscellaneous.go
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@ -8,11 +8,9 @@ import (
"reflect"
"github.com/Unknwon/macaron"
"github.com/macaron-contrib/i18n"
"github.com/macaron-contrib/binding"
"github.com/gogits/gogs/modules/auth"
"github.com/gogits/gogs/modules/log"
"github.com/gogits/gogs/modules/middleware/binding"
)
type MarkdownForm struct {
@ -21,18 +19,13 @@ type MarkdownForm struct {
Context string `form:"context"`
}
func (f *MarkdownForm) Validate(ctx *macaron.Context, errs *binding.Errors, l i18n.Locale) {
validateApiReq(errs, ctx.Data, f, l)
func (f *MarkdownForm) Validate(ctx *macaron.Context, errs binding.Errors) binding.Errors {
return validateApiReq(errs, ctx.Data, f)
}
func validateApiReq(errs *binding.Errors, data map[string]interface{}, f interface{}, l i18n.Locale) {
if errs.Count() == 0 {
return
} else if len(errs.Overall) > 0 {
for _, err := range errs.Overall {
log.Error(4, "%s: %v", reflect.TypeOf(f), err)
}
return
func validateApiReq(errs binding.Errors, data map[string]interface{}, f auth.Form) binding.Errors {
if errs.Len() == 0 {
return errs
}
data["HasError"] = true
@ -54,26 +47,27 @@ func validateApiReq(errs *binding.Errors, data map[string]interface{}, f interfa
continue
}
if err, ok := errs.Fields[field.Name]; ok {
switch err {
case binding.BindingRequireError:
if errs[0].FieldNames[0] == field.Name {
switch errs[0].Classification {
case binding.RequiredError:
data["ErrorMsg"] = fieldName + " cannot be empty"
case binding.BindingAlphaDashError:
case binding.AlphaDashError:
data["ErrorMsg"] = fieldName + " must be valid alpha or numeric or dash(-_) characters"
case binding.BindingAlphaDashDotError:
case binding.AlphaDashDotError:
data["ErrorMsg"] = fieldName + " must be valid alpha or numeric or dash(-_) or dot characters"
case binding.BindingMinSizeError:
case binding.MinSizeError:
data["ErrorMsg"] = fieldName + " must contain at least " + auth.GetMinSize(field) + " characters"
case binding.BindingMaxSizeError:
case binding.MaxSizeError:
data["ErrorMsg"] = fieldName + " must contain at most " + auth.GetMaxSize(field) + " characters"
case binding.BindingEmailError:
case binding.EmailError:
data["ErrorMsg"] = fieldName + " is not a valid e-mail address"
case binding.BindingUrlError:
case binding.UrlError:
data["ErrorMsg"] = fieldName + " is not a valid URL"
default:
data["ErrorMsg"] = "Unknown error: " + err
data["ErrorMsg"] = "Unknown error: " + errs[0].Classification
}
return
return errs
}
}
return errs
}

42
modules/auth/auth.go
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@ -9,12 +9,12 @@ import (
"reflect"
"strings"
"github.com/macaron-contrib/i18n"
"github.com/Unknwon/macaron"
"github.com/macaron-contrib/binding"
"github.com/macaron-contrib/session"
"github.com/gogits/gogs/models"
"github.com/gogits/gogs/modules/log"
"github.com/gogits/gogs/modules/middleware/binding"
"github.com/gogits/gogs/modules/setting"
)
@ -69,6 +69,10 @@ func SignedInUser(header http.Header, sess session.Store) *models.User {
return u
}
type Form interface {
binding.Validator
}
// AssignForm assign form values back to the template data.
func AssignForm(form interface{}, data map[string]interface{}) {
typ := reflect.TypeOf(form)
@ -109,14 +113,9 @@ func GetMaxSize(field reflect.StructField) string {
return getSize(field, "MaxSize(")
}
func validate(errs *binding.Errors, data map[string]interface{}, f interface{}, l i18n.Locale) {
if errs.Count() == 0 {
return
} else if len(errs.Overall) > 0 {
for _, err := range errs.Overall {
log.Error(4, "%s: %v", reflect.TypeOf(f), err)
}
return
func validate(errs binding.Errors, data map[string]interface{}, f Form, l macaron.Locale) binding.Errors {
if errs.Len() == 0 {
return errs
}
data["HasError"] = true
@ -139,28 +138,29 @@ func validate(errs *binding.Errors, data map[string]interface{}, f interface{},
continue
}
if err, ok := errs.Fields[field.Name]; ok {
if errs[0].FieldNames[0] == field.Name {
data["Err_"+field.Name] = true
trName := l.Tr("form." + field.Name)
switch err {
case binding.BindingRequireError:
switch errs[0].Classification {
case binding.RequiredError:
data["ErrorMsg"] = trName + l.Tr("form.require_error")
case binding.BindingAlphaDashError:
case binding.AlphaDashError:
data["ErrorMsg"] = trName + l.Tr("form.alpha_dash_error")
case binding.BindingAlphaDashDotError:
case binding.AlphaDashDotError:
data["ErrorMsg"] = trName + l.Tr("form.alpha_dash_dot_error")
case binding.BindingMinSizeError:
case binding.MinSizeError:
data["ErrorMsg"] = trName + l.Tr("form.min_size_error", GetMinSize(field))
case binding.BindingMaxSizeError:
case binding.MaxSizeError:
data["ErrorMsg"] = trName + l.Tr("form.max_size_error", GetMaxSize(field))
case binding.BindingEmailError:
case binding.EmailError:
data["ErrorMsg"] = trName + l.Tr("form.email_error")
case binding.BindingUrlError:
case binding.UrlError:
data["ErrorMsg"] = trName + l.Tr("form.url_error")
default:
data["ErrorMsg"] = l.Tr("form.unknown_error") + " " + err
data["ErrorMsg"] = l.Tr("form.unknown_error") + " " + errs[0].Classification
}
return
return errs
}
}
return errs
}

8
modules/auth/auth_form.go
View File

@ -6,9 +6,7 @@ package auth
import (
"github.com/Unknwon/macaron"
"github.com/macaron-contrib/i18n"
"github.com/gogits/gogs/modules/middleware/binding"
"github.com/macaron-contrib/binding"
)
type AuthenticationForm struct {
@ -31,6 +29,6 @@ type AuthenticationForm struct {
AllowAutoRegister bool `form:"allowautoregister"`
}
func (f *AuthenticationForm) Validate(ctx *macaron.Context, errs *binding.Errors, l i18n.Locale) {
validate(errs, ctx.Data, f, l)
func (f *AuthenticationForm) Validate(ctx *macaron.Context, errs binding.Errors) binding.Errors {
return validate(errs, ctx.Data, f, ctx.Locale)
}

16
modules/auth/org.go
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@ -6,9 +6,7 @@ package auth
import (
"github.com/Unknwon/macaron"
"github.com/macaron-contrib/i18n"
"github.com/gogits/gogs/modules/middleware/binding"
"github.com/macaron-contrib/binding"
)
// ________ .__ __ .__
@ -23,8 +21,8 @@ type CreateOrgForm struct {
Email string `form:"email" binding:"Required;Email;MaxSize(50)"`
}
func (f *CreateOrgForm) Validate(ctx *macaron.Context, errs *binding.Errors, l i18n.Locale) {
validate(errs, ctx.Data, f, l)
func (f *CreateOrgForm) Validate(ctx *macaron.Context, errs binding.Errors) binding.Errors {
return validate(errs, ctx.Data, f, ctx.Locale)
}
type UpdateOrgSettingForm struct {
@ -37,8 +35,8 @@ type UpdateOrgSettingForm struct {
Avatar string `form:"avatar" binding:"Required;Email;MaxSize(50)"`
}
func (f *UpdateOrgSettingForm) Validate(ctx *macaron.Context, errs *binding.Errors, l i18n.Locale) {
validate(errs, ctx.Data, f, l)
func (f *UpdateOrgSettingForm) Validate(ctx *macaron.Context, errs binding.Errors) binding.Errors {
return validate(errs, ctx.Data, f, ctx.Locale)
}
// ___________
@ -54,6 +52,6 @@ type CreateTeamForm struct {
Permission string `form:"permission"`
}
func (f *CreateTeamForm) Validate(ctx *macaron.Context, errs *binding.Errors, l i18n.Locale) {
validate(errs, ctx.Data, f, l)
func (f *CreateTeamForm) Validate(ctx *macaron.Context, errs binding.Errors) binding.Errors {
return validate(errs, ctx.Data, f, ctx.Locale)
}

8
modules/auth/publickey_form.go
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@ -6,9 +6,7 @@ package auth
import (
"github.com/Unknwon/macaron"
"github.com/macaron-contrib/i18n"
"github.com/gogits/gogs/modules/middleware/binding"
"github.com/macaron-contrib/binding"
)
type AddSSHKeyForm struct {
@ -16,6 +14,6 @@ type AddSSHKeyForm struct {
Content string `form:"content" binding:"Required"`
}
func (f *AddSSHKeyForm) Validate(ctx *macaron.Context, errs *binding.Errors, l i18n.Locale) {
validate(errs, ctx.Data, f, l)
func (f *AddSSHKeyForm) Validate(ctx *macaron.Context, errs binding.Errors) binding.Errors {
return validate(errs, ctx.Data, f, ctx.Locale)
}

44
modules/auth/repo_form.go
View File

@ -6,9 +6,7 @@ package auth
import (
"github.com/Unknwon/macaron"
"github.com/macaron-contrib/i18n"
"github.com/gogits/gogs/modules/middleware/binding"
"github.com/macaron-contrib/binding"
)
// _______________________________________ _________.______________________ _______________.___.
@ -28,8 +26,8 @@ type CreateRepoForm struct {
InitReadme bool `form:"init_readme"`
}
func (f *CreateRepoForm) Validate(ctx *macaron.Context, errs *binding.Errors, l i18n.Locale) {
validate(errs, ctx.Data, f, l)
func (f *CreateRepoForm) Validate(ctx *macaron.Context, errs binding.Errors) binding.Errors {
return validate(errs, ctx.Data, f, ctx.Locale)
}
type MigrateRepoForm struct {
@ -43,8 +41,8 @@ type MigrateRepoForm struct {
Description string `form:"desc" binding:"MaxSize(255)"`
}
func (f *MigrateRepoForm) Validate(ctx *macaron.Context, errs *binding.Errors, l i18n.Locale) {
validate(errs, ctx.Data, f, l)
func (f *MigrateRepoForm) Validate(ctx *macaron.Context, errs binding.Errors) binding.Errors {
return validate(errs, ctx.Data, f, ctx.Locale)
}
type RepoSettingForm struct {
@ -57,8 +55,8 @@ type RepoSettingForm struct {
GoGet bool `form:"goget"`
}
func (f *RepoSettingForm) Validate(ctx *macaron.Context, errs *binding.Errors, l i18n.Locale) {
validate(errs, ctx.Data, f, l)
func (f *RepoSettingForm) Validate(ctx *macaron.Context, errs binding.Errors) binding.Errors {
return validate(errs, ctx.Data, f, ctx.Locale)
}
// __ __ ___. .__ .__ __
@ -77,8 +75,8 @@ type NewWebhookForm struct {
Active bool `form:"active"`
}
func (f *NewWebhookForm) Validate(ctx *macaron.Context, errs *binding.Errors, l i18n.Locale) {
validate(errs, ctx.Data, f, l)
func (f *NewWebhookForm) Validate(ctx *macaron.Context, errs binding.Errors) binding.Errors {
return validate(errs, ctx.Data, f, ctx.Locale)
}
type NewSlackHookForm struct {
@ -90,8 +88,8 @@ type NewSlackHookForm struct {
Active bool `form:"active"`
}
func (f *NewSlackHookForm) Validate(ctx *macaron.Context, errs *binding.Errors, l i18n.Locale) {
validate(errs, ctx.Data, f, l)
func (f *NewSlackHookForm) Validate(ctx *macaron.Context, errs binding.Errors) binding.Errors {
return validate(errs, ctx.Data, f, ctx.Locale)
}
// .___
@ -109,8 +107,8 @@ type CreateIssueForm struct {
Content string `form:"content"`
}
func (f *CreateIssueForm) Validate(ctx *macaron.Context, errs *binding.Errors, l i18n.Locale) {
validate(errs, ctx.Data, f, l)
func (f *CreateIssueForm) Validate(ctx *macaron.Context, errs binding.Errors) binding.Errors {
return validate(errs, ctx.Data, f, ctx.Locale)
}
// _____ .__.__ __
@ -126,8 +124,8 @@ type CreateMilestoneForm struct {
Deadline string `form:"due_date"`
}
func (f *CreateMilestoneForm) Validate(ctx *macaron.Context, errs *binding.Errors, l i18n.Locale) {
validate(errs, ctx.Data, f, l)
func (f *CreateMilestoneForm) Validate(ctx *macaron.Context, errs binding.Errors) binding.Errors {
return validate(errs, ctx.Data, f, ctx.Locale)
}
// .____ ___. .__
@ -142,8 +140,8 @@ type CreateLabelForm struct {
Color string `form:"color" binding:"Required;Size(7)"`
}
func (f *CreateLabelForm) Validate(ctx *macaron.Context, errs *binding.Errors, l i18n.Locale) {
validate(errs, ctx.Data, f, l)
func (f *CreateLabelForm) Validate(ctx *macaron.Context, errs binding.Errors) binding.Errors {
return validate(errs, ctx.Data, f, ctx.Locale)
}
// __________ .__
@ -162,8 +160,8 @@ type NewReleaseForm struct {
Prerelease bool `form:"prerelease"`
}
func (f *NewReleaseForm) Validate(ctx *macaron.Context, errs *binding.Errors, l i18n.Locale) {
validate(errs, ctx.Data, f, l)
func (f *NewReleaseForm) Validate(ctx *macaron.Context, errs binding.Errors) binding.Errors {
return validate(errs, ctx.Data, f, ctx.Locale)
}
type EditReleaseForm struct {
@ -174,6 +172,6 @@ type EditReleaseForm struct {
Prerelease bool `form:"prerelease"`
}
func (f *EditReleaseForm) Validate(ctx *macaron.Context, errs *binding.Errors, l i18n.Locale) {
validate(errs, ctx.Data, f, l)
func (f *EditReleaseForm) Validate(ctx *macaron.Context, errs binding.Errors) binding.Errors {
return validate(errs, ctx.Data, f, ctx.Locale)
}

24
modules/auth/user_form.go
View File

@ -6,9 +6,7 @@ package auth
import (
"github.com/Unknwon/macaron"
"github.com/macaron-contrib/i18n"
"github.com/gogits/gogs/modules/middleware/binding"
"github.com/macaron-contrib/binding"
)
type InstallForm struct {
@ -34,8 +32,8 @@ type InstallForm struct {
AdminEmail string `form:"admin_email" binding:"Required;Email;MaxSize(50)"`
}
func (f *InstallForm) Validate(ctx *macaron.Context, errs *binding.Errors, l i18n.Locale) {
validate(errs, ctx.Data, f, l)
func (f *InstallForm) Validate(ctx *macaron.Context, errs binding.Errors) binding.Errors {
return validate(errs, ctx.Data, f, ctx.Locale)
}
// _____ ____ _________________ ___
@ -54,8 +52,8 @@ type RegisterForm struct {
LoginName string `form:"loginname"`
}
func (f *RegisterForm) Validate(ctx *macaron.Context, errs *binding.Errors, l i18n.Locale) {
validate(errs, ctx.Data, f, l)
func (f *RegisterForm) Validate(ctx *macaron.Context, errs binding.Errors) binding.Errors {
return validate(errs, ctx.Data, f, ctx.Locale)
}
type SignInForm struct {
@ -64,8 +62,8 @@ type SignInForm struct {
Remember bool `form:"remember"`
}
func (f *SignInForm) Validate(ctx *macaron.Context, errs *binding.Errors, l i18n.Locale) {
validate(errs, ctx.Data, f, l)
func (f *SignInForm) Validate(ctx *macaron.Context, errs binding.Errors) binding.Errors {
return validate(errs, ctx.Data, f, ctx.Locale)
}
// __________________________________________.___ _______ ________ _________
@ -84,8 +82,8 @@ type UpdateProfileForm struct {
Avatar string `form:"avatar" binding:"Required;Email;MaxSize(50)"`
}
func (f *UpdateProfileForm) Validate(ctx *macaron.Context, errs *binding.Errors, l i18n.Locale) {
validate(errs, ctx.Data, f, l)
func (f *UpdateProfileForm) Validate(ctx *macaron.Context, errs binding.Errors) binding.Errors {
return validate(errs, ctx.Data, f, ctx.Locale)
}
type ChangePasswordForm struct {
@ -94,6 +92,6 @@ type ChangePasswordForm struct {
Retype string `form:"retype"`
}
func (f *ChangePasswordForm) Validate(ctx *macaron.Context, errs *binding.Errors, l i18n.Locale) {
validate(errs, ctx.Data, f, l)
func (f *ChangePasswordForm) Validate(ctx *macaron.Context, errs binding.Errors) binding.Errors {
return validate(errs, ctx.Data, f, ctx.Locale)
}

472
modules/middleware/binding/binding.go
View File

@ -1,472 +0,0 @@
// Copyright 2013 The Martini Contrib Authors. All rights reserved.
// Copyright 2014 The Gogs Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package binding
import (
"encoding/json"
"fmt"
"io"
"net/http"
"reflect"
"regexp"
"strconv"
"strings"
"unicode/utf8"
"github.com/Unknwon/macaron"
"github.com/macaron-contrib/i18n"
)
/*
To the land of Middle-ware Earth:
One func to rule them all,
One func to find them,
One func to bring them all,
And in this package BIND them.
*/
// Bind accepts a copy of an empty struct and populates it with
// values from the request (if deserialization is successful). It
// wraps up the functionality of the Form and Json middleware
// according to the Content-Type of the request, and it guesses
// if no Content-Type is specified. 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) {
contentType := ctx.Req.Header.Get("Content-Type")
if strings.Contains(contentType, "form-urlencoded") {
ctx.Invoke(Form(obj, ifacePtr...))
} else if strings.Contains(contentType, "multipart/form-data") {
ctx.Invoke(MultipartForm(obj, ifacePtr...))
} else if strings.Contains(contentType, "json") {
ctx.Invoke(Json(obj, ifacePtr...))
} else {
ctx.Invoke(Json(obj, ifacePtr...))
if getErrors(ctx).Count() > 0 {
ctx.Invoke(Form(obj, ifacePtr...))
}
}
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, req *http.Request) {
contentType := req.Header.Get("Content-Type")
if strings.Contains(contentType, "form-urlencoded") {
ctx.Invoke(Form(obj, ifacePtr...))
} else if strings.Contains(contentType, "multipart/form-data") {
ctx.Invoke(MultipartForm(obj, ifacePtr...))
} else if strings.Contains(contentType, "json") {
ctx.Invoke(Json(obj, ifacePtr...))
} else {
ctx.Invoke(Json(obj, ifacePtr...))
if getErrors(ctx).Count() > 0 {
ctx.Invoke(Form(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) {
ensureNotPointer(formStruct)
formStruct := reflect.New(reflect.TypeOf(formStruct))
errors := newErrors()
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.Overall[BindingDeserializationError] = parseErr.Error()
}
mapForm(formStruct, ctx.Req.Form, errors)
validateAndMap(formStruct, ctx, errors, ifacePtr...)
}
}
func MultipartForm(formStruct interface{}, ifacePtr ...interface{}) macaron.Handler {
return func(ctx *macaron.Context) {
ensureNotPointer(formStruct)
formStruct := reflect.New(reflect.TypeOf(formStruct))
errors := newErrors()
// Workaround for multipart forms returning nil instead of an error
// when content is not multipart
// https://code.google.com/p/go/issues/detail?id=6334
multipartReader, err := ctx.Req.MultipartReader()
if err != nil {
errors.Overall[BindingDeserializationError] = err.Error()
} else {
form, parseErr := multipartReader.ReadForm(MaxMemory)
if parseErr != nil {
errors.Overall[BindingDeserializationError] = parseErr.Error()
}
ctx.Req.MultipartForm = form
}
mapForm(formStruct, ctx.Req.MultipartForm.Value, 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) {
ensureNotPointer(jsonStruct)
jsonStruct := reflect.New(reflect.TypeOf(jsonStruct))
errors := newErrors()
if ctx.Req.Body != nil {
defer ctx.Req.Body.Close()
}
if err := json.NewDecoder(ctx.Req.Body).Decode(jsonStruct.Interface()); err != nil && err != io.EOF {
errors.Overall[BindingDeserializationError] = err.Error()
}
validateAndMap(jsonStruct, ctx, errors, ifacePtr...)
}
}
// Validate is middleware to enforce required fields. If the struct
// passed in is a 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 them and maps them.
func Validate(obj interface{}) macaron.Handler {
return func(ctx *macaron.Context, l i18n.Locale) {
errors := newErrors()
validateStruct(errors, obj)
if validator, ok := obj.(Validator); ok {
validator.Validate(ctx, errors, l)
}
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):\/\/[\w\-_]+(\.[\w\-_]+)+([\w\-\.,@?^=%&:/~\+#]*[\w\-\@?^=%&/~\+#])?`)
)
func validateStruct(errors *Errors, obj interface{}) {
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") == "-" {
continue
}
fieldValue := val.Field(i).Interface()
if field.Type.Kind() == reflect.Struct {
validateStruct(errors, fieldValue)
continue
}
zero := reflect.Zero(field.Type).Interface()
// Match rules.
for _, rule := range strings.Split(field.Tag.Get("binding"), ";") {
if len(rule) == 0 {
continue
}
switch {
case rule == "Required":
if reflect.DeepEqual(zero, fieldValue) {
errors.Fields[field.Name] = BindingRequireError
break
}
case rule == "AlphaDash":
if alphaDashPattern.MatchString(fmt.Sprintf("%v", fieldValue)) {
errors.Fields[field.Name] = BindingAlphaDashError
break
}
case rule == "AlphaDashDot":
if alphaDashDotPattern.MatchString(fmt.Sprintf("%v", fieldValue)) {
errors.Fields[field.Name] = BindingAlphaDashDotError
break
}
case strings.HasPrefix(rule, "MinSize("):
min, err := strconv.Atoi(rule[8 : len(rule)-1])
if err != nil {
errors.Overall["MinSize"] = err.Error()
break
}
if str, ok := fieldValue.(string); ok && utf8.RuneCountInString(str) < min {
errors.Fields[field.Name] = BindingMinSizeError
break
}
v := reflect.ValueOf(fieldValue)
if v.Kind() == reflect.Slice && v.Len() < min {
errors.Fields[field.Name] = BindingMinSizeError
break
}
case strings.HasPrefix(rule, "MaxSize("):
max, err := strconv.Atoi(rule[8 : len(rule)-1])
if err != nil {
errors.Overall["MaxSize"] = err.Error()
break
}
if str, ok := fieldValue.(string); ok && utf8.RuneCountInString(str) > max {
errors.Fields[field.Name] = BindingMaxSizeError
break
}
v := reflect.ValueOf(fieldValue)
if v.Kind() == reflect.Slice && v.Len() > max {
errors.Fields[field.Name] = BindingMinSizeError
break
}
case rule == "Email":
if !emailPattern.MatchString(fmt.Sprintf("%v", fieldValue)) {
errors.Fields[field.Name] = BindingEmailError
break
}
case rule == "Url":
str := fmt.Sprintf("%v", fieldValue)
if len(str) == 0 {
continue
} else if !urlPattern.MatchString(str) {
errors.Fields[field.Name] = BindingUrlError
break
}
}
}
}
}
func mapForm(formStruct reflect.Value, form map[string][]string, errors *Errors) {
typ := formStruct.Elem().Type()
for i := 0; i < typ.NumField(); i++ {
typeField := typ.Field(i)
if inputFieldName := typeField.Tag.Get("form"); inputFieldName != "" {
structField := formStruct.Elem().Field(i)
if !structField.CanSet() {
continue
}
inputValue, exists := form[inputFieldName]
if !exists {
continue
}
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.Elem().Field(i).Set(slice)
} else {
setWithProperType(typeField.Type.Kind(), inputValue[0], structField, inputFieldName, errors)
}
}
}
}
// ErrorHandler simply counts the number of errors in the
// context and, if more than 0, writes a 400 Bad Request
// response and a JSON payload describing the errors with
// the "Content-Type" set to "application/json".
// 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, resp http.ResponseWriter) {
if errs.Count() > 0 {
resp.Header().Set("Content-Type", "application/json; charset=utf-8")
if _, ok := errs.Overall[BindingDeserializationError]; ok {
resp.WriteHeader(http.StatusBadRequest)
} else {
resp.WriteHeader(422)
}
errOutput, _ := json.Marshal(errs)
resp.Write(errOutput)
return
}
}
// 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.Fields[nameInTag] = BindingIntegerTypeError
} 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.Fields[nameInTag] = BindingIntegerTypeError
} else {
structField.SetUint(uintVal)
}
case reflect.Bool:
structField.SetBool(val == "on")
case reflect.Float32:
if val == "" {
val = "0.0"
}
floatVal, err := strconv.ParseFloat(val, 32)
if err != nil {
errors.Fields[nameInTag] = BindingFloatTypeError
} else {
structField.SetFloat(floatVal)
}
case reflect.Float64:
if val == "" {
val = "0.0"
}
floatVal, err := strconv.ParseFloat(val, 64)
if err != nil {
errors.Fields[nameInTag] = BindingFloatTypeError
} 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.Combine(getErrors(ctx))
ctx.Map(*errors)
ctx.Map(obj.Elem().Interface())
if len(ifacePtr) > 0 {
ctx.MapTo(obj.Elem().Interface(), ifacePtr[0])
}
}
func newErrors() *Errors {
return &Errors{make(map[string]string), make(map[string]string)}
}
func getErrors(ctx *macaron.Context) Errors {
return ctx.GetVal(reflect.TypeOf(Errors{})).Interface().(Errors)
}
type (
// Implement the Validator interface to define your own input
// validation before the request even gets to your application.
// The Validate method will be executed during the validation phase.
Validator interface {
Validate(*macaron.Context, *Errors, i18n.Locale)
}
)
var (
// Maximum amount of memory to use when parsing a multipart form.
// Set this to whatever value you prefer; default is 10 MB.
MaxMemory = int64(1024 * 1024 * 10)
)
// Errors represents the contract of the response body when the
// binding step fails before getting to the application.
type Errors struct {
Overall map[string]string `json:"overall"`
Fields map[string]string `json:"fields"`
}
// Total errors is the sum of errors with the request overall
// and errors on individual fields.
func (err Errors) Count() int {
return len(err.Overall) + len(err.Fields)
}
func (this *Errors) Combine(other Errors) {
for key, val := range other.Fields {
if _, exists := this.Fields[key]; !exists {
this.Fields[key] = val
}
}
for key, val := range other.Overall {
if _, exists := this.Overall[key]; !exists {
this.Overall[key] = val
}
}
}
const (
BindingRequireError string = "Required"
BindingAlphaDashError string = "AlphaDash"
BindingAlphaDashDotError string = "AlphaDashDot"
BindingMinSizeError string = "MinSize"
BindingMaxSizeError string = "MaxSize"
BindingEmailError string = "Email"
BindingUrlError string = "Url"
BindingDeserializationError string = "DeserializationError"
BindingIntegerTypeError string = "IntegerTypeError"
BindingBooleanTypeError string = "BooleanTypeError"
BindingFloatTypeError string = "FloatTypeError"
)