// SPDX-License-Identifier: MIT
// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
package echo
import (
"bytes"
"encoding/json"
"encoding/xml"
"errors"
"fmt"
"io"
"mime/multipart"
"net/http"
"net/http/httptest"
"net/url"
"reflect"
"strconv"
"strings"
"testing"
"time"
"github.com/stretchr/testify/assert"
)
type bindTestStruct struct {
I int
PtrI *int
I8 int8
PtrI8 *int8
I16 int16
PtrI16 *int16
I32 int32
PtrI32 *int32
I64 int64
PtrI64 *int64
UI uint
PtrUI *uint
UI8 uint8
PtrUI8 *uint8
UI16 uint16
PtrUI16 *uint16
UI32 uint32
PtrUI32 *uint32
UI64 uint64
PtrUI64 *uint64
B bool
PtrB *bool
F32 float32
PtrF32 *float32
F64 float64
PtrF64 *float64
S string
PtrS *string
cantSet string
DoesntExist string
GoT time.Time
GoTptr *time.Time
T Timestamp
Tptr *Timestamp
SA StringArray
}
type bindTestStructWithTags struct {
I int `json:"I" form:"I"`
PtrI *int `json:"PtrI" form:"PtrI"`
I8 int8 `json:"I8" form:"I8"`
PtrI8 *int8 `json:"PtrI8" form:"PtrI8"`
I16 int16 `json:"I16" form:"I16"`
PtrI16 *int16 `json:"PtrI16" form:"PtrI16"`
I32 int32 `json:"I32" form:"I32"`
PtrI32 *int32 `json:"PtrI32" form:"PtrI32"`
I64 int64 `json:"I64" form:"I64"`
PtrI64 *int64 `json:"PtrI64" form:"PtrI64"`
UI uint `json:"UI" form:"UI"`
PtrUI *uint `json:"PtrUI" form:"PtrUI"`
UI8 uint8 `json:"UI8" form:"UI8"`
PtrUI8 *uint8 `json:"PtrUI8" form:"PtrUI8"`
UI16 uint16 `json:"UI16" form:"UI16"`
PtrUI16 *uint16 `json:"PtrUI16" form:"PtrUI16"`
UI32 uint32 `json:"UI32" form:"UI32"`
PtrUI32 *uint32 `json:"PtrUI32" form:"PtrUI32"`
UI64 uint64 `json:"UI64" form:"UI64"`
PtrUI64 *uint64 `json:"PtrUI64" form:"PtrUI64"`
B bool `json:"B" form:"B"`
PtrB *bool `json:"PtrB" form:"PtrB"`
F32 float32 `json:"F32" form:"F32"`
PtrF32 *float32 `json:"PtrF32" form:"PtrF32"`
F64 float64 `json:"F64" form:"F64"`
PtrF64 *float64 `json:"PtrF64" form:"PtrF64"`
S string `json:"S" form:"S"`
PtrS *string `json:"PtrS" form:"PtrS"`
cantSet string
DoesntExist string `json:"DoesntExist" form:"DoesntExist"`
GoT time.Time `json:"GoT" form:"GoT"`
GoTptr *time.Time `json:"GoTptr" form:"GoTptr"`
T Timestamp `json:"T" form:"T"`
Tptr *Timestamp `json:"Tptr" form:"Tptr"`
SA StringArray `json:"SA" form:"SA"`
}
type Timestamp time.Time
type TA []Timestamp
type StringArray []string
type Struct struct {
Foo string
}
type Bar struct {
Baz int `json:"baz" query:"baz"`
}
func (t *Timestamp) UnmarshalParam(src string) error {
ts, err := time.Parse(time.RFC3339, src)
*t = Timestamp(ts)
return err
}
func (a *StringArray) UnmarshalParam(src string) error {
*a = StringArray(strings.Split(src, ","))
return nil
}
func (s *Struct) UnmarshalParam(src string) error {
*s = Struct{
Foo: src,
}
return nil
}
func (t bindTestStruct) GetCantSet() string {
return t.cantSet
}
var values = map[string][]string{
"I": {"0"},
"PtrI": {"0"},
"I8": {"8"},
"PtrI8": {"8"},
"I16": {"16"},
"PtrI16": {"16"},
"I32": {"32"},
"PtrI32": {"32"},
"I64": {"64"},
"PtrI64": {"64"},
"UI": {"0"},
"PtrUI": {"0"},
"UI8": {"8"},
"PtrUI8": {"8"},
"UI16": {"16"},
"PtrUI16": {"16"},
"UI32": {"32"},
"PtrUI32": {"32"},
"UI64": {"64"},
"PtrUI64": {"64"},
"B": {"true"},
"PtrB": {"true"},
"F32": {"32.5"},
"PtrF32": {"32.5"},
"F64": {"64.5"},
"PtrF64": {"64.5"},
"S": {"test"},
"PtrS": {"test"},
"cantSet": {"test"},
"T": {"2016-12-06T19:09:05+01:00"},
"Tptr": {"2016-12-06T19:09:05+01:00"},
"GoT": {"2016-12-06T19:09:05+01:00"},
"GoTptr": {"2016-12-06T19:09:05+01:00"},
"ST": {"bar"},
}
// ptr return pointer to value. This is useful as `v := []*int8{&int8(1)}` will not compile
func ptr[T any](value T) *T {
return &value
}
func TestToMultipleFields(t *testing.T) {
e := New()
req := httptest.NewRequest(http.MethodGet, "/?id=1&ID=2", nil)
rec := httptest.NewRecorder()
c := e.NewContext(req, rec)
type Root struct {
ID int64 `query:"id"`
Child2 struct {
ID int64
}
Child1 struct {
ID int64 `query:"id"`
}
}
u := new(Root)
err := c.Bind(u)
if assert.NoError(t, err) {
assert.Equal(t, int64(1), u.ID) // perfectly reasonable
assert.Equal(t, int64(1), u.Child1.ID) // untagged struct containing tagged field gets filled (by tag)
assert.Equal(t, int64(0), u.Child2.ID) // untagged struct containing untagged field should not be bind
}
}
func TestBindJSON(t *testing.T) {
testBindOkay(t, strings.NewReader(userJSON), nil, MIMEApplicationJSON)
testBindOkay(t, strings.NewReader(userJSON), dummyQuery, MIMEApplicationJSON)
testBindArrayOkay(t, strings.NewReader(usersJSON), nil, MIMEApplicationJSON)
testBindArrayOkay(t, strings.NewReader(usersJSON), dummyQuery, MIMEApplicationJSON)
testBindError(t, strings.NewReader(invalidContent), MIMEApplicationJSON, &json.SyntaxError{})
testBindError(t, strings.NewReader(userJSONInvalidType), MIMEApplicationJSON, &json.UnmarshalTypeError{})
}
func TestBindXML(t *testing.T) {
testBindOkay(t, strings.NewReader(userXML), nil, MIMEApplicationXML)
testBindOkay(t, strings.NewReader(userXML), dummyQuery, MIMEApplicationXML)
testBindArrayOkay(t, strings.NewReader(userXML), nil, MIMEApplicationXML)
testBindArrayOkay(t, strings.NewReader(userXML), dummyQuery, MIMEApplicationXML)
testBindError(t, strings.NewReader(invalidContent), MIMEApplicationXML, errors.New(""))
testBindError(t, strings.NewReader(userXMLConvertNumberError), MIMEApplicationXML, &strconv.NumError{})
testBindError(t, strings.NewReader(userXMLUnsupportedTypeError), MIMEApplicationXML, &xml.SyntaxError{})
testBindOkay(t, strings.NewReader(userXML), nil, MIMETextXML)
testBindOkay(t, strings.NewReader(userXML), dummyQuery, MIMETextXML)
testBindError(t, strings.NewReader(invalidContent), MIMETextXML, errors.New(""))
testBindError(t, strings.NewReader(userXMLConvertNumberError), MIMETextXML, &strconv.NumError{})
testBindError(t, strings.NewReader(userXMLUnsupportedTypeError), MIMETextXML, &xml.SyntaxError{})
}
func TestBindForm(t *testing.T) {
testBindOkay(t, strings.NewReader(userForm), nil, MIMEApplicationForm)
testBindOkay(t, strings.NewReader(userForm), dummyQuery, MIMEApplicationForm)
e := New()
req := httptest.NewRequest(http.MethodPost, "/", strings.NewReader(userForm))
rec := httptest.NewRecorder()
c := e.NewContext(req, rec)
req.Header.Set(HeaderContentType, MIMEApplicationForm)
err := c.Bind(&[]struct{ Field string }{})
assert.Error(t, err)
}
func TestBindQueryParams(t *testing.T) {
e := New()
req := httptest.NewRequest(http.MethodGet, "/?id=1&name=Jon+Snow", nil)
rec := httptest.NewRecorder()
c := e.NewContext(req, rec)
u := new(user)
err := c.Bind(u)
if assert.NoError(t, err) {
assert.Equal(t, 1, u.ID)
assert.Equal(t, "Jon Snow", u.Name)
}
}
func TestBindQueryParamsCaseInsensitive(t *testing.T) {
e := New()
req := httptest.NewRequest(http.MethodGet, "/?ID=1&NAME=Jon+Snow", nil)
rec := httptest.NewRecorder()
c := e.NewContext(req, rec)
u := new(user)
err := c.Bind(u)
if assert.NoError(t, err) {
assert.Equal(t, 1, u.ID)
assert.Equal(t, "Jon Snow", u.Name)
}
}
func TestBindQueryParamsCaseSensitivePrioritized(t *testing.T) {
e := New()
req := httptest.NewRequest(http.MethodGet, "/?id=1&ID=2&NAME=Jon+Snow&name=Jon+Doe", nil)
rec := httptest.NewRecorder()
c := e.NewContext(req, rec)
u := new(user)
err := c.Bind(u)
if assert.NoError(t, err) {
assert.Equal(t, 1, u.ID)
assert.Equal(t, "Jon Doe", u.Name)
}
}
func TestBindHeaderParam(t *testing.T) {
e := New()
req := httptest.NewRequest(http.MethodGet, "/", nil)
req.Header.Set("Name", "Jon Doe")
req.Header.Set("Id", "2")
rec := httptest.NewRecorder()
c := e.NewContext(req, rec)
u := new(user)
err := (&DefaultBinder{}).BindHeaders(c, u)
if assert.NoError(t, err) {
assert.Equal(t, 2, u.ID)
assert.Equal(t, "Jon Doe", u.Name)
}
}
func TestBindHeaderParamBadType(t *testing.T) {
e := New()
req := httptest.NewRequest(http.MethodGet, "/", nil)
req.Header.Set("Id", "salamander")
rec := httptest.NewRecorder()
c := e.NewContext(req, rec)
u := new(user)
err := (&DefaultBinder{}).BindHeaders(c, u)
assert.Error(t, err)
httpErr, ok := err.(*HTTPError)
if assert.True(t, ok) {
assert.Equal(t, http.StatusBadRequest, httpErr.Code)
}
}
func TestBindUnmarshalParam(t *testing.T) {
e := New()
req := httptest.NewRequest(http.MethodGet, "/?ts=2016-12-06T19:09:05Z&sa=one,two,three&ta=2016-12-06T19:09:05Z&ta=2016-12-06T19:09:05Z&ST=baz", nil)
rec := httptest.NewRecorder()
c := e.NewContext(req, rec)
result := struct {
T Timestamp `query:"ts"`
TA []Timestamp `query:"ta"`
SA StringArray `query:"sa"`
ST Struct
StWithTag struct {
Foo string `query:"st"`
}
}{}
err := c.Bind(&result)
ts := Timestamp(time.Date(2016, 12, 6, 19, 9, 5, 0, time.UTC))
if assert.NoError(t, err) {
// assert.Equal( Timestamp(reflect.TypeOf(&Timestamp{}), time.Date(2016, 12, 6, 19, 9, 5, 0, time.UTC)), result.T)
assert.Equal(t, ts, result.T)
assert.Equal(t, StringArray([]string{"one", "two", "three"}), result.SA)
assert.Equal(t, []Timestamp{ts, ts}, result.TA)
assert.Equal(t, Struct{""}, result.ST) // child struct does not have a field with matching tag
assert.Equal(t, "baz", result.StWithTag.Foo) // child struct has field with matching tag
}
}
func TestBindUnmarshalText(t *testing.T) {
e := New()
req := httptest.NewRequest(http.MethodGet, "/?ts=2016-12-06T19:09:05Z&sa=one,two,three&ta=2016-12-06T19:09:05Z&ta=2016-12-06T19:09:05Z&ST=baz", nil)
rec := httptest.NewRecorder()
c := e.NewContext(req, rec)
result := struct {
T time.Time `query:"ts"`
TA []time.Time `query:"ta"`
SA StringArray `query:"sa"`
ST Struct
}{}
err := c.Bind(&result)
ts := time.Date(2016, 12, 6, 19, 9, 5, 0, time.UTC)
if assert.NoError(t, err) {
// assert.Equal(t, Timestamp(reflect.TypeOf(&Timestamp{}), time.Date(2016, 12, 6, 19, 9, 5, 0, time.UTC)), result.T)
assert.Equal(t, ts, result.T)
assert.Equal(t, StringArray([]string{"one", "two", "three"}), result.SA)
assert.Equal(t, []time.Time{ts, ts}, result.TA)
assert.Equal(t, Struct{""}, result.ST) // field in child struct does not have tag
}
}
func TestBindUnmarshalParamPtr(t *testing.T) {
e := New()
req := httptest.NewRequest(http.MethodGet, "/?ts=2016-12-06T19:09:05Z", nil)
rec := httptest.NewRecorder()
c := e.NewContext(req, rec)
result := struct {
Tptr *Timestamp `query:"ts"`
}{}
err := c.Bind(&result)
if assert.NoError(t, err) {
assert.Equal(t, Timestamp(time.Date(2016, 12, 6, 19, 9, 5, 0, time.UTC)), *result.Tptr)
}
}
func TestBindUnmarshalParamAnonymousFieldPtr(t *testing.T) {
e := New()
req := httptest.NewRequest(http.MethodGet, "/?baz=1", nil)
rec := httptest.NewRecorder()
c := e.NewContext(req, rec)
result := struct {
*Bar
}{&Bar{}}
err := c.Bind(&result)
if assert.NoError(t, err) {
assert.Equal(t, 1, result.Baz)
}
}
func TestBindUnmarshalParamAnonymousFieldPtrNil(t *testing.T) {
e := New()
req := httptest.NewRequest(http.MethodGet, "/?baz=1", nil)
rec := httptest.NewRecorder()
c := e.NewContext(req, rec)
result := struct {
*Bar
}{}
err := c.Bind(&result)
if assert.NoError(t, err) {
assert.Nil(t, result.Bar)
}
}
func TestBindUnmarshalParamAnonymousFieldPtrCustomTag(t *testing.T) {
e := New()
req := httptest.NewRequest(http.MethodGet, `/?bar={"baz":100}&baz=1`, nil)
rec := httptest.NewRecorder()
c := e.NewContext(req, rec)
result := struct {
*Bar `json:"bar" query:"bar"`
}{&Bar{}}
err := c.Bind(&result)
assert.Contains(t, err.Error(), "query/param/form tags are not allowed with anonymous struct field")
}
func TestBindUnmarshalTextPtr(t *testing.T) {
e := New()
req := httptest.NewRequest(http.MethodGet, "/?ts=2016-12-06T19:09:05Z", nil)
rec := httptest.NewRecorder()
c := e.NewContext(req, rec)
result := struct {
Tptr *time.Time `query:"ts"`
}{}
err := c.Bind(&result)
if assert.NoError(t, err) {
assert.Equal(t, time.Date(2016, 12, 6, 19, 9, 5, 0, time.UTC), *result.Tptr)
}
}
func TestBindMultipartForm(t *testing.T) {
bodyBuffer := new(bytes.Buffer)
mw := multipart.NewWriter(bodyBuffer)
mw.WriteField("id", "1")
mw.WriteField("name", "Jon Snow")
mw.Close()
body := bodyBuffer.Bytes()
testBindOkay(t, bytes.NewReader(body), nil, mw.FormDataContentType())
testBindOkay(t, bytes.NewReader(body), dummyQuery, mw.FormDataContentType())
}
func TestBindUnsupportedMediaType(t *testing.T) {
testBindError(t, strings.NewReader(invalidContent), MIMEApplicationJSON, &json.SyntaxError{})
}
func TestDefaultBinder_bindDataToMap(t *testing.T) {
exampleData := map[string][]string{
"multiple": {"1", "2"},
"single": {"3"},
}
t.Run("ok, bind to map[string]string", func(t *testing.T) {
dest := map[string]string{}
assert.NoError(t, new(DefaultBinder).bindData(&dest, exampleData, "param", nil))
assert.Equal(t,
map[string]string{
"multiple": "1",
"single": "3",
},
dest,
)
})
t.Run("ok, bind to map[string]string with nil map", func(t *testing.T) {
var dest map[string]string
assert.NoError(t, new(DefaultBinder).bindData(&dest, exampleData, "param", nil))
assert.Equal(t,
map[string]string{
"multiple": "1",
"single": "3",
},
dest,
)
})
t.Run("ok, bind to map[string][]string", func(t *testing.T) {
dest := map[string][]string{}
assert.NoError(t, new(DefaultBinder).bindData(&dest, exampleData, "param", nil))
assert.Equal(t,
map[string][]string{
"multiple": {"1", "2"},
"single": {"3"},
},
dest,
)
})
t.Run("ok, bind to map[string][]string with nil map", func(t *testing.T) {
var dest map[string][]string
assert.NoError(t, new(DefaultBinder).bindData(&dest, exampleData, "param", nil))
assert.Equal(t,
map[string][]string{
"multiple": {"1", "2"},
"single": {"3"},
},
dest,
)
})
t.Run("ok, bind to map[string]interface", func(t *testing.T) {
dest := map[string]interface{}{}
assert.NoError(t, new(DefaultBinder).bindData(&dest, exampleData, "param", nil))
assert.Equal(t,
map[string]interface{}{
"multiple": "1",
"single": "3",
},
dest,
)
})
t.Run("ok, bind to map[string]interface with nil map", func(t *testing.T) {
var dest map[string]interface{}
assert.NoError(t, new(DefaultBinder).bindData(&dest, exampleData, "param", nil))
assert.Equal(t,
map[string]interface{}{
"multiple": "1",
"single": "3",
},
dest,
)
})
t.Run("ok, bind to map[string]int skips", func(t *testing.T) {
dest := map[string]int{}
assert.NoError(t, new(DefaultBinder).bindData(&dest, exampleData, "param", nil))
assert.Equal(t, map[string]int{}, dest)
})
t.Run("ok, bind to map[string]int skips with nil map", func(t *testing.T) {
var dest map[string]int
assert.NoError(t, new(DefaultBinder).bindData(&dest, exampleData, "param", nil))
assert.Equal(t, map[string]int(nil), dest)
})
t.Run("ok, bind to map[string][]int skips", func(t *testing.T) {
dest := map[string][]int{}
assert.NoError(t, new(DefaultBinder).bindData(&dest, exampleData, "param", nil))
assert.Equal(t, map[string][]int{}, dest)
})
t.Run("ok, bind to map[string][]int skips with nil map", func(t *testing.T) {
var dest map[string][]int
assert.NoError(t, new(DefaultBinder).bindData(&dest, exampleData, "param", nil))
assert.Equal(t, map[string][]int(nil), dest)
})
}
func TestBindbindData(t *testing.T) {
ts := new(bindTestStruct)
b := new(DefaultBinder)
err := b.bindData(ts, values, "form", nil)
assert.NoError(t, err)
assert.Equal(t, 0, ts.I)
assert.Equal(t, int8(0), ts.I8)
assert.Equal(t, int16(0), ts.I16)
assert.Equal(t, int32(0), ts.I32)
assert.Equal(t, int64(0), ts.I64)
assert.Equal(t, uint(0), ts.UI)
assert.Equal(t, uint8(0), ts.UI8)
assert.Equal(t, uint16(0), ts.UI16)
assert.Equal(t, uint32(0), ts.UI32)
assert.Equal(t, uint64(0), ts.UI64)
assert.Equal(t, false, ts.B)
assert.Equal(t, float32(0), ts.F32)
assert.Equal(t, float64(0), ts.F64)
assert.Equal(t, "", ts.S)
assert.Equal(t, "", ts.cantSet)
}
func TestBindParam(t *testing.T) {
e := New()
req := httptest.NewRequest(http.MethodGet, "/", nil)
rec := httptest.NewRecorder()
c := e.NewContext(req, rec)
c.SetPath("/users/:id/:name")
c.SetParamNames("id", "name")
c.SetParamValues("1", "Jon Snow")
u := new(user)
err := c.Bind(u)
if assert.NoError(t, err) {
assert.Equal(t, 1, u.ID)
assert.Equal(t, "Jon Snow", u.Name)
}
// Second test for the absence of a param
c2 := e.NewContext(req, rec)
c2.SetPath("/users/:id")
c2.SetParamNames("id")
c2.SetParamValues("1")
u = new(user)
err = c2.Bind(u)
if assert.NoError(t, err) {
assert.Equal(t, 1, u.ID)
assert.Equal(t, "", u.Name)
}
// Bind something with param and post data payload
body := bytes.NewBufferString(`{ "name": "Jon Snow" }`)
e2 := New()
req2 := httptest.NewRequest(http.MethodPost, "/", body)
req2.Header.Set(HeaderContentType, MIMEApplicationJSON)
rec2 := httptest.NewRecorder()
c3 := e2.NewContext(req2, rec2)
c3.SetPath("/users/:id")
c3.SetParamNames("id")
c3.SetParamValues("1")
u = new(user)
err = c3.Bind(u)
if assert.NoError(t, err) {
assert.Equal(t, 1, u.ID)
assert.Equal(t, "Jon Snow", u.Name)
}
}
func TestBindUnmarshalTypeError(t *testing.T) {
body := bytes.NewBufferString(`{ "id": "text" }`)
e := New()
req := httptest.NewRequest(http.MethodPost, "/", body)
req.Header.Set(HeaderContentType, MIMEApplicationJSON)
rec := httptest.NewRecorder()
c := e.NewContext(req, rec)
u := new(user)
err := c.Bind(u)
he := &HTTPError{Code: http.StatusBadRequest, Message: "Unmarshal type error: expected=int, got=string, field=id, offset=14", Internal: err.(*HTTPError).Internal}
assert.Equal(t, he, err)
}
func TestBindSetWithProperType(t *testing.T) {
ts := new(bindTestStruct)
typ := reflect.TypeOf(ts).Elem()
val := reflect.ValueOf(ts).Elem()
for i := 0; i < typ.NumField(); i++ {
typeField := typ.Field(i)
structField := val.Field(i)
if !structField.CanSet() {
continue
}
if len(values[typeField.Name]) == 0 {
continue
}
val := values[typeField.Name][0]
err := setWithProperType(typeField.Type.Kind(), val, structField)
assert.NoError(t, err)
}
assertBindTestStruct(t, ts)
type foo struct {
Bar bytes.Buffer
}
v := &foo{}
typ = reflect.TypeOf(v).Elem()
val = reflect.ValueOf(v).Elem()
assert.Error(t, setWithProperType(typ.Field(0).Type.Kind(), "5", val.Field(0)))
}
func BenchmarkBindbindDataWithTags(b *testing.B) {
b.ReportAllocs()
ts := new(bindTestStructWithTags)
binder := new(DefaultBinder)
var err error
b.ResetTimer()
for i := 0; i < b.N; i++ {
err = binder.bindData(ts, values, "form", nil)
}
assert.NoError(b, err)
assertBindTestStruct(b, (*bindTestStruct)(ts))
}
func assertBindTestStruct(tb testing.TB, ts *bindTestStruct) {
assert.Equal(tb, 0, ts.I)
assert.Equal(tb, int8(8), ts.I8)
assert.Equal(tb, int16(16), ts.I16)
assert.Equal(tb, int32(32), ts.I32)
assert.Equal(tb, int64(64), ts.I64)
assert.Equal(tb, uint(0), ts.UI)
assert.Equal(tb, uint8(8), ts.UI8)
assert.Equal(tb, uint16(16), ts.UI16)
assert.Equal(tb, uint32(32), ts.UI32)
assert.Equal(tb, uint64(64), ts.UI64)
assert.Equal(tb, true, ts.B)
assert.Equal(tb, float32(32.5), ts.F32)
assert.Equal(tb, float64(64.5), ts.F64)
assert.Equal(tb, "test", ts.S)
assert.Equal(tb, "", ts.GetCantSet())
}
func testBindOkay(t *testing.T, r io.Reader, query url.Values, ctype string) {
e := New()
path := "/"
if len(query) > 0 {
path += "?" + query.Encode()
}
req := httptest.NewRequest(http.MethodPost, path, r)
rec := httptest.NewRecorder()
c := e.NewContext(req, rec)
req.Header.Set(HeaderContentType, ctype)
u := new(user)
err := c.Bind(u)
if assert.Equal(t, nil, err) {
assert.Equal(t, 1, u.ID)
assert.Equal(t, "Jon Snow", u.Name)
}
}
func testBindArrayOkay(t *testing.T, r io.Reader, query url.Values, ctype string) {
e := New()
path := "/"
if len(query) > 0 {
path += "?" + query.Encode()
}
req := httptest.NewRequest(http.MethodPost, path, r)
rec := httptest.NewRecorder()
c := e.NewContext(req, rec)
req.Header.Set(HeaderContentType, ctype)
u := []user{}
err := c.Bind(&u)
if assert.NoError(t, err) {
assert.Equal(t, 1, len(u))
assert.Equal(t, 1, u[0].ID)
assert.Equal(t, "Jon Snow", u[0].Name)
}
}
func testBindError(t *testing.T, r io.Reader, ctype string, expectedInternal error) {
e := New()
req := httptest.NewRequest(http.MethodPost, "/", r)
rec := httptest.NewRecorder()
c := e.NewContext(req, rec)
req.Header.Set(HeaderContentType, ctype)
u := new(user)
err := c.Bind(u)
switch {
case strings.HasPrefix(ctype, MIMEApplicationJSON), strings.HasPrefix(ctype, MIMEApplicationXML), strings.HasPrefix(ctype, MIMETextXML),
strings.HasPrefix(ctype, MIMEApplicationForm), strings.HasPrefix(ctype, MIMEMultipartForm):
if assert.IsType(t, new(HTTPError), err) {
assert.Equal(t, http.StatusBadRequest, err.(*HTTPError).Code)
assert.IsType(t, expectedInternal, err.(*HTTPError).Internal)
}
default:
if assert.IsType(t, new(HTTPError), err) {
assert.Equal(t, ErrUnsupportedMediaType, err)
assert.IsType(t, expectedInternal, err.(*HTTPError).Internal)
}
}
}
func TestDefaultBinder_BindToStructFromMixedSources(t *testing.T) {
// tests to check binding behaviour when multiple sources (path params, query params and request body) are in use
// binding is done in steps and one source could overwrite previous source binded data
// these tests are to document this behaviour and detect further possible regressions when bind implementation is changed
type Opts struct {
ID int `json:"id" form:"id" query:"id"`
Node string `json:"node" form:"node" query:"node" param:"node"`
Lang string
}
var testCases = []struct {
name string
givenURL string
givenContent io.Reader
givenMethod string
whenBindTarget interface{}
whenNoPathParams bool
expect interface{}
expectError string
}{
{
name: "ok, POST bind to struct with: path param + query param + body",
givenMethod: http.MethodPost,
givenURL: "/api/real_node/endpoint?node=xxx",
givenContent: strings.NewReader(`{"id": 1}`),
expect: &Opts{ID: 1, Node: "node_from_path"}, // query params are not used, node is filled from path
},
{
name: "ok, PUT bind to struct with: path param + query param + body",
givenMethod: http.MethodPut,
givenURL: "/api/real_node/endpoint?node=xxx",
givenContent: strings.NewReader(`{"id": 1}`),
expect: &Opts{ID: 1, Node: "node_from_path"}, // query params are not used
},
{
name: "ok, GET bind to struct with: path param + query param + body",
givenMethod: http.MethodGet,
givenURL: "/api/real_node/endpoint?node=xxx",
givenContent: strings.NewReader(`{"id": 1}`),
expect: &Opts{ID: 1, Node: "xxx"}, // query overwrites previous path value
},
{
name: "ok, GET bind to struct with: path param + query param + body",
givenMethod: http.MethodGet,
givenURL: "/api/real_node/endpoint?node=xxx",
givenContent: strings.NewReader(`{"id": 1, "node": "zzz"}`),
expect: &Opts{ID: 1, Node: "zzz"}, // body is binded last and overwrites previous (path,query) values
},
{
name: "ok, DELETE bind to struct with: path param + query param + body",
givenMethod: http.MethodDelete,
givenURL: "/api/real_node/endpoint?node=xxx",
givenContent: strings.NewReader(`{"id": 1, "node": "zzz"}`),
expect: &Opts{ID: 1, Node: "zzz"}, // for DELETE body is binded after query params
},
{
name: "ok, POST bind to struct with: path param + body",
givenMethod: http.MethodPost,
givenURL: "/api/real_node/endpoint",
givenContent: strings.NewReader(`{"id": 1}`),
expect: &Opts{ID: 1, Node: "node_from_path"},
},
{
name: "ok, POST bind to struct with path + query + body = body has priority",
givenMethod: http.MethodPost,
givenURL: "/api/real_node/endpoint?node=xxx",
givenContent: strings.NewReader(`{"id": 1, "node": "zzz"}`),
expect: &Opts{ID: 1, Node: "zzz"}, // field value from content has higher priority
},
{
name: "nok, POST body bind failure",
givenMethod: http.MethodPost,
givenURL: "/api/real_node/endpoint?node=xxx",
givenContent: strings.NewReader(`{`),
expect: &Opts{ID: 0, Node: "node_from_path"}, // query binding has already modified bind target
expectError: "code=400, message=unexpected EOF, internal=unexpected EOF",
},
{
name: "nok, GET with body bind failure when types are not convertible",
givenMethod: http.MethodGet,
givenURL: "/api/real_node/endpoint?id=nope",
givenContent: strings.NewReader(`{"id": 1, "node": "zzz"}`),
expect: &Opts{ID: 0, Node: "node_from_path"}, // path params binding has already modified bind target
expectError: "code=400, message=strconv.ParseInt: parsing \"nope\": invalid syntax, internal=strconv.ParseInt: parsing \"nope\": invalid syntax",
},
{
name: "nok, GET body bind failure - trying to bind json array to struct",
givenMethod: http.MethodGet,
givenURL: "/api/real_node/endpoint?node=xxx",
givenContent: strings.NewReader(`[{"id": 1}]`),
expect: &Opts{ID: 0, Node: "xxx"}, // query binding has already modified bind target
expectError: "code=400, message=Unmarshal type error: expected=echo.Opts, got=array, field=, offset=1, internal=json: cannot unmarshal array into Go value of type echo.Opts",
},
{ // query param is ignored as we do not know where exactly to bind it in slice
name: "ok, GET bind to struct slice, ignore query param",
givenMethod: http.MethodGet,
givenURL: "/api/real_node/endpoint?node=xxx",
givenContent: strings.NewReader(`[{"id": 1}]`),
whenNoPathParams: true,
whenBindTarget: &[]Opts{},
expect: &[]Opts{
{ID: 1, Node: ""},
},
},
{ // binding query params interferes with body. b.BindBody() should be used to bind only body to slice
name: "ok, POST binding to slice should not be affected query params types",
givenMethod: http.MethodPost,
givenURL: "/api/real_node/endpoint?id=nope&node=xxx",
givenContent: strings.NewReader(`[{"id": 1}]`),
whenNoPathParams: true,
whenBindTarget: &[]Opts{},
expect: &[]Opts{{ID: 1}},
expectError: "",
},
{ // path param is ignored as we do not know where exactly to bind it in slice
name: "ok, GET bind to struct slice, ignore path param",
givenMethod: http.MethodGet,
givenURL: "/api/real_node/endpoint?node=xxx",
givenContent: strings.NewReader(`[{"id": 1}]`),
whenBindTarget: &[]Opts{},
expect: &[]Opts{
{ID: 1, Node: ""},
},
},
{
name: "ok, GET body bind json array to slice",
givenMethod: http.MethodGet,
givenURL: "/api/real_node/endpoint",
givenContent: strings.NewReader(`[{"id": 1}]`),
whenNoPathParams: true,
whenBindTarget: &[]Opts{},
expect: &[]Opts{{ID: 1, Node: ""}},
expectError: "",
},
}
for _, tc := range testCases {
t.Run(tc.name, func(t *testing.T) {
e := New()
// assume route we are testing is "/api/:node/endpoint?some_query_params=here"
req := httptest.NewRequest(tc.givenMethod, tc.givenURL, tc.givenContent)
req.Header.Set(HeaderContentType, MIMEApplicationJSON)
rec := httptest.NewRecorder()
c := e.NewContext(req, rec)
if !tc.whenNoPathParams {
c.SetParamNames("node")
c.SetParamValues("node_from_path")
}
var bindTarget interface{}
if tc.whenBindTarget != nil {
bindTarget = tc.whenBindTarget
} else {
bindTarget = &Opts{}
}
b := new(DefaultBinder)
err := b.Bind(bindTarget, c)
if tc.expectError != "" {
assert.EqualError(t, err, tc.expectError)
} else {
assert.NoError(t, err)
}
assert.Equal(t, tc.expect, bindTarget)
})
}
}
func TestDefaultBinder_BindBody(t *testing.T) {
// tests to check binding behaviour when multiple sources (path params, query params and request body) are in use
// generally when binding from request body - URL and path params are ignored - unless form is being binded.
// these tests are to document this behaviour and detect further possible regressions when bind implementation is changed
type Node struct {
ID int `json:"id" xml:"id" form:"id" query:"id"`
Node string `json:"node" xml:"node" form:"node" query:"node" param:"node"`
}
type Nodes struct {
Nodes []Node `xml:"node" form:"node"`
}
var testCases = []struct {
name string
givenURL string
givenContent io.Reader
givenMethod string
givenContentType string
whenNoPathParams bool
whenBindTarget interface{}
expect interface{}
expectError string
}{
{
name: "ok, JSON POST bind to struct with: path + query + empty field in body",
givenURL: "/api/real_node/endpoint?node=xxx",
givenMethod: http.MethodPost,
givenContentType: MIMEApplicationJSON,
givenContent: strings.NewReader(`{"id": 1}`),
expect: &Node{ID: 1, Node: ""}, // path params or query params should not interfere with body
},
{
name: "ok, JSON POST bind to struct with: path + query + body",
givenURL: "/api/real_node/endpoint?node=xxx",
givenMethod: http.MethodPost,
givenContentType: MIMEApplicationJSON,
givenContent: strings.NewReader(`{"id": 1, "node": "zzz"}`),
expect: &Node{ID: 1, Node: "zzz"}, // field value from content has higher priority
},
{
name: "ok, JSON POST body bind json array to slice (has matching path/query params)",
givenURL: "/api/real_node/endpoint?node=xxx",
givenMethod: http.MethodPost,
givenContentType: MIMEApplicationJSON,
givenContent: strings.NewReader(`[{"id": 1}]`),
whenNoPathParams: true,
whenBindTarget: &[]Node{},
expect: &[]Node{{ID: 1, Node: ""}},
expectError: "",
},
{ // rare case as GET is not usually used to send request body
name: "ok, JSON GET bind to struct with: path + query + empty field in body",
givenURL: "/api/real_node/endpoint?node=xxx",
givenMethod: http.MethodGet,
givenContentType: MIMEApplicationJSON,
givenContent: strings.NewReader(`{"id": 1}`),
expect: &Node{ID: 1, Node: ""}, // path params or query params should not interfere with body
},
{ // rare case as GET is not usually used to send request body
name: "ok, JSON GET bind to struct with: path + query + body",
givenURL: "/api/real_node/endpoint?node=xxx",
givenMethod: http.MethodGet,
givenContentType: MIMEApplicationJSON,
givenContent: strings.NewReader(`{"id": 1, "node": "zzz"}`),
expect: &Node{ID: 1, Node: "zzz"}, // field value from content has higher priority
},
{
name: "nok, JSON POST body bind failure",
givenURL: "/api/real_node/endpoint?node=xxx",
givenMethod: http.MethodPost,
givenContentType: MIMEApplicationJSON,
givenContent: strings.NewReader(`{`),
expect: &Node{ID: 0, Node: ""},
expectError: "code=400, message=unexpected EOF, internal=unexpected EOF",
},
{
name: "ok, XML POST bind to struct with: path + query + empty body",
givenURL: "/api/real_node/endpoint?node=xxx",
givenMethod: http.MethodPost,
givenContentType: MIMEApplicationXML,
givenContent: strings.NewReader(`1yyy`),
expect: &Node{ID: 1, Node: "yyy"},
},
{
name: "ok, XML POST bind array to slice with: path + query + body",
givenURL: "/api/real_node/endpoint?node=xxx",
givenMethod: http.MethodPost,
givenContentType: MIMEApplicationXML,
givenContent: strings.NewReader(`1yyy`),
whenBindTarget: &Nodes{},
expect: &Nodes{Nodes: []Node{{ID: 1, Node: "yyy"}}},
},
{
name: "nok, XML POST bind failure",
givenURL: "/api/real_node/endpoint?node=xxx",
givenMethod: http.MethodPost,
givenContentType: MIMEApplicationXML,
givenContent: strings.NewReader(`<`),
expect: &Node{ID: 0, Node: ""},
expectError: "code=400, message=Syntax error: line=1, error=XML syntax error on line 1: unexpected EOF, internal=XML syntax error on line 1: unexpected EOF",
},
{
name: "ok, FORM POST bind to struct with: path + query + body",
givenURL: "/api/real_node/endpoint?node=xxx",
givenMethod: http.MethodPost,
givenContentType: MIMEApplicationForm,
givenContent: strings.NewReader(`id=1&node=yyy`),
expect: &Node{ID: 1, Node: "yyy"},
},
{
// NB: form values are taken from BOTH body and query for POST/PUT/PATCH by standard library implementation
// See: https://golang.org/pkg/net/http/#Request.ParseForm
name: "ok, FORM POST bind to struct with: path + query + empty field in body",
givenURL: "/api/real_node/endpoint?node=xxx",
givenMethod: http.MethodPost,
givenContentType: MIMEApplicationForm,
givenContent: strings.NewReader(`id=1`),
expect: &Node{ID: 1, Node: "xxx"},
},
{
// NB: form values are taken from query by standard library implementation
// See: https://golang.org/pkg/net/http/#Request.ParseForm
name: "ok, FORM GET bind to struct with: path + query + empty field in body",
givenURL: "/api/real_node/endpoint?node=xxx",
givenMethod: http.MethodGet,
givenContentType: MIMEApplicationForm,
givenContent: strings.NewReader(`id=1`),
expect: &Node{ID: 0, Node: "xxx"}, // 'xxx' is taken from URL and body is not used with GET by implementation
},
{
name: "nok, unsupported content type",
givenURL: "/api/real_node/endpoint?node=xxx",
givenMethod: http.MethodPost,
givenContentType: MIMETextPlain,
givenContent: strings.NewReader(``),
expect: &Node{ID: 0, Node: ""},
expectError: "code=415, message=Unsupported Media Type",
},
}
for _, tc := range testCases {
t.Run(tc.name, func(t *testing.T) {
e := New()
// assume route we are testing is "/api/:node/endpoint?some_query_params=here"
req := httptest.NewRequest(tc.givenMethod, tc.givenURL, tc.givenContent)
switch tc.givenContentType {
case MIMEApplicationXML:
req.Header.Set(HeaderContentType, MIMEApplicationXML)
case MIMEApplicationForm:
req.Header.Set(HeaderContentType, MIMEApplicationForm)
case MIMEApplicationJSON:
req.Header.Set(HeaderContentType, MIMEApplicationJSON)
}
rec := httptest.NewRecorder()
c := e.NewContext(req, rec)
if !tc.whenNoPathParams {
c.SetParamNames("node")
c.SetParamValues("real_node")
}
var bindTarget interface{}
if tc.whenBindTarget != nil {
bindTarget = tc.whenBindTarget
} else {
bindTarget = &Node{}
}
b := new(DefaultBinder)
err := b.BindBody(c, bindTarget)
if tc.expectError != "" {
assert.EqualError(t, err, tc.expectError)
} else {
assert.NoError(t, err)
}
assert.Equal(t, tc.expect, bindTarget)
})
}
}
func testBindURL(queryString string, target any) error {
e := New()
req := httptest.NewRequest(http.MethodGet, queryString, nil)
rec := httptest.NewRecorder()
c := e.NewContext(req, rec)
return c.Bind(target)
}
type unixTimestamp struct {
Time time.Time
}
func (t *unixTimestamp) UnmarshalParam(param string) error {
n, err := strconv.ParseInt(param, 10, 64)
if err != nil {
return fmt.Errorf("'%s' is not an integer", param)
}
*t = unixTimestamp{Time: time.Unix(n, 0)}
return err
}
type IntArrayA []int
// UnmarshalParam converts value to *Int64Slice. This allows the API to accept
// a comma-separated list of integers as a query parameter.
func (i *IntArrayA) UnmarshalParam(value string) error {
var values = strings.Split(value, ",")
var numbers = make([]int, 0, len(values))
for _, v := range values {
n, err := strconv.ParseInt(v, 10, 64)
if err != nil {
return fmt.Errorf("'%s' is not an integer", v)
}
numbers = append(numbers, int(n))
}
*i = append(*i, numbers...)
return nil
}
func TestBindUnmarshalParamExtras(t *testing.T) {
// this test documents how bind handles `BindUnmarshaler` interface:
// NOTE: BindUnmarshaler chooses first input value to be bound.
t.Run("nok, unmarshalling fails", func(t *testing.T) {
result := struct {
V unixTimestamp `query:"t"`
}{}
err := testBindURL("/?t=xxxx", &result)
assert.EqualError(t, err, "code=400, message='xxxx' is not an integer, internal='xxxx' is not an integer")
})
t.Run("ok, target is struct", func(t *testing.T) {
result := struct {
V unixTimestamp `query:"t"`
}{}
err := testBindURL("/?t=1710095540&t=1710095541", &result)
assert.NoError(t, err)
expect := unixTimestamp{
Time: time.Unix(1710095540, 0),
}
assert.Equal(t, expect, result.V)
})
t.Run("ok, target is an alias to slice and is nil, append only values from first", func(t *testing.T) {
result := struct {
V IntArrayA `query:"a"`
}{}
err := testBindURL("/?a=1,2,3&a=4,5,6", &result)
assert.NoError(t, err)
assert.Equal(t, IntArrayA([]int{1, 2, 3}), result.V)
})
t.Run("ok, target is an alias to slice and is nil, single input", func(t *testing.T) {
result := struct {
V IntArrayA `query:"a"`
}{}
err := testBindURL("/?a=1,2", &result)
assert.NoError(t, err)
assert.Equal(t, IntArrayA([]int{1, 2}), result.V)
})
t.Run("ok, target is pointer an alias to slice and is nil", func(t *testing.T) {
result := struct {
V *IntArrayA `query:"a"`
}{}
err := testBindURL("/?a=1&a=4,5,6", &result)
assert.NoError(t, err)
var expected = IntArrayA([]int{1})
assert.Equal(t, &expected, result.V)
})
t.Run("ok, target is pointer an alias to slice and is NOT nil", func(t *testing.T) {
result := struct {
V *IntArrayA `query:"a"`
}{}
result.V = new(IntArrayA) // NOT nil
err := testBindURL("/?a=1&a=4,5,6", &result)
assert.NoError(t, err)
var expected = IntArrayA([]int{1})
assert.Equal(t, &expected, result.V)
})
}
type unixTimestampLast struct {
Time time.Time
}
// this is silly example for `bindMultipleUnmarshaler` for type that uses last input value for unmarshalling
func (t *unixTimestampLast) UnmarshalParams(params []string) error {
lastInput := params[len(params)-1]
n, err := strconv.ParseInt(lastInput, 10, 64)
if err != nil {
return fmt.Errorf("'%s' is not an integer", lastInput)
}
*t = unixTimestampLast{Time: time.Unix(n, 0)}
return err
}
type IntArrayB []int
func (i *IntArrayB) UnmarshalParams(params []string) error {
var numbers = make([]int, 0, len(params))
for _, param := range params {
var values = strings.Split(param, ",")
for _, v := range values {
n, err := strconv.ParseInt(v, 10, 64)
if err != nil {
return fmt.Errorf("'%s' is not an integer", v)
}
numbers = append(numbers, int(n))
}
}
*i = append(*i, numbers...)
return nil
}
func TestBindUnmarshalParams(t *testing.T) {
// this test documents how bind handles `bindMultipleUnmarshaler` interface:
t.Run("nok, unmarshalling fails", func(t *testing.T) {
result := struct {
V unixTimestampLast `query:"t"`
}{}
err := testBindURL("/?t=xxxx", &result)
assert.EqualError(t, err, "code=400, message='xxxx' is not an integer, internal='xxxx' is not an integer")
})
t.Run("ok, target is struct", func(t *testing.T) {
result := struct {
V unixTimestampLast `query:"t"`
}{}
err := testBindURL("/?t=1710095540&t=1710095541", &result)
assert.NoError(t, err)
expect := unixTimestampLast{
Time: time.Unix(1710095541, 0),
}
assert.Equal(t, expect, result.V)
})
t.Run("ok, target is an alias to slice and is nil, append multiple inputs", func(t *testing.T) {
result := struct {
V IntArrayB `query:"a"`
}{}
err := testBindURL("/?a=1,2,3&a=4,5,6", &result)
assert.NoError(t, err)
assert.Equal(t, IntArrayB([]int{1, 2, 3, 4, 5, 6}), result.V)
})
t.Run("ok, target is an alias to slice and is nil, single input", func(t *testing.T) {
result := struct {
V IntArrayB `query:"a"`
}{}
err := testBindURL("/?a=1,2", &result)
assert.NoError(t, err)
assert.Equal(t, IntArrayB([]int{1, 2}), result.V)
})
t.Run("ok, target is pointer an alias to slice and is nil", func(t *testing.T) {
result := struct {
V *IntArrayB `query:"a"`
}{}
err := testBindURL("/?a=1&a=4,5,6", &result)
assert.NoError(t, err)
var expected = IntArrayB([]int{1, 4, 5, 6})
assert.Equal(t, &expected, result.V)
})
t.Run("ok, target is pointer an alias to slice and is NOT nil", func(t *testing.T) {
result := struct {
V *IntArrayB `query:"a"`
}{}
result.V = new(IntArrayB) // NOT nil
err := testBindURL("/?a=1&a=4,5,6", &result)
assert.NoError(t, err)
var expected = IntArrayB([]int{1, 4, 5, 6})
assert.Equal(t, &expected, result.V)
})
}
func TestBindInt8(t *testing.T) {
t.Run("nok, binding fails", func(t *testing.T) {
type target struct {
V int8 `query:"v"`
}
p := target{}
err := testBindURL("/?v=x&v=2", &p)
assert.EqualError(t, err, "code=400, message=strconv.ParseInt: parsing \"x\": invalid syntax, internal=strconv.ParseInt: parsing \"x\": invalid syntax")
})
t.Run("nok, int8 embedded in struct", func(t *testing.T) {
type target struct {
int8 `query:"v"` // embedded field is `Anonymous`. We can only set public fields
}
p := target{}
err := testBindURL("/?v=1&v=2", &p)
assert.NoError(t, err)
assert.Equal(t, target{0}, p)
})
t.Run("nok, pointer to int8 embedded in struct", func(t *testing.T) {
type target struct {
*int8 `query:"v"` // embedded field is `Anonymous`. We can only set public fields
}
p := target{}
err := testBindURL("/?v=1&v=2", &p)
assert.NoError(t, err)
assert.Equal(t, target{int8: nil}, p)
})
t.Run("ok, bind int8 as struct field", func(t *testing.T) {
type target struct {
V int8 `query:"v"`
}
p := target{V: 127}
err := testBindURL("/?v=1&v=2", &p)
assert.NoError(t, err)
assert.Equal(t, target{V: 1}, p)
})
t.Run("ok, bind pointer to int8 as struct field, value is nil", func(t *testing.T) {
type target struct {
V *int8 `query:"v"`
}
p := target{}
err := testBindURL("/?v=1&v=2", &p)
assert.NoError(t, err)
assert.Equal(t, target{V: ptr(int8(1))}, p)
})
t.Run("ok, bind pointer to int8 as struct field, value is set", func(t *testing.T) {
type target struct {
V *int8 `query:"v"`
}
p := target{V: ptr(int8(127))}
err := testBindURL("/?v=1&v=2", &p)
assert.NoError(t, err)
assert.Equal(t, target{V: ptr(int8(1))}, p)
})
t.Run("ok, bind int8 slice as struct field, value is nil", func(t *testing.T) {
type target struct {
V []int8 `query:"v"`
}
p := target{}
err := testBindURL("/?v=1&v=2", &p)
assert.NoError(t, err)
assert.Equal(t, target{V: []int8{1, 2}}, p)
})
t.Run("ok, bind slice of int8 as struct field, value is set", func(t *testing.T) {
type target struct {
V []int8 `query:"v"`
}
p := target{V: []int8{111}}
err := testBindURL("/?v=1&v=2", &p)
assert.NoError(t, err)
assert.Equal(t, target{V: []int8{1, 2}}, p)
})
t.Run("ok, bind slice of pointer to int8 as struct field, value is set", func(t *testing.T) {
type target struct {
V []*int8 `query:"v"`
}
p := target{V: []*int8{ptr(int8(127))}}
err := testBindURL("/?v=1&v=2", &p)
assert.NoError(t, err)
assert.Equal(t, target{V: []*int8{ptr(int8(1)), ptr(int8(2))}}, p)
})
t.Run("ok, bind pointer to slice of int8 as struct field, value is set", func(t *testing.T) {
type target struct {
V *[]int8 `query:"v"`
}
p := target{V: &[]int8{111}}
err := testBindURL("/?v=1&v=2", &p)
assert.NoError(t, err)
assert.Equal(t, target{V: &[]int8{1, 2}}, p)
})
}
func TestBindMultipartFormFiles(t *testing.T) {
file1 := createTestFormFile("file", "file1.txt")
file11 := createTestFormFile("file", "file11.txt")
file2 := createTestFormFile("file2", "file2.txt")
filesA := createTestFormFile("files", "filesA.txt")
filesB := createTestFormFile("files", "filesB.txt")
t.Run("nok, can not bind to multipart file struct", func(t *testing.T) {
var target struct {
File multipart.FileHeader `form:"file"`
}
err := bindMultipartFiles(t, &target, file1, file2) // file2 should be ignored
assert.EqualError(t, err, "code=400, message=binding to multipart.FileHeader struct is not supported, use pointer to struct, internal=binding to multipart.FileHeader struct is not supported, use pointer to struct")
})
t.Run("ok, bind single multipart file to pointer to multipart file", func(t *testing.T) {
var target struct {
File *multipart.FileHeader `form:"file"`
}
err := bindMultipartFiles(t, &target, file1, file2) // file2 should be ignored
assert.NoError(t, err)
assertMultipartFileHeader(t, target.File, file1)
})
t.Run("ok, bind multiple multipart files to pointer to multipart file", func(t *testing.T) {
var target struct {
File *multipart.FileHeader `form:"file"`
}
err := bindMultipartFiles(t, &target, file1, file11)
assert.NoError(t, err)
assertMultipartFileHeader(t, target.File, file1) // should choose first one
})
t.Run("ok, bind multiple multipart files to slice of multipart file", func(t *testing.T) {
var target struct {
Files []multipart.FileHeader `form:"files"`
}
err := bindMultipartFiles(t, &target, filesA, filesB, file1)
assert.NoError(t, err)
assert.Len(t, target.Files, 2)
assertMultipartFileHeader(t, &target.Files[0], filesA)
assertMultipartFileHeader(t, &target.Files[1], filesB)
})
t.Run("ok, bind multiple multipart files to slice of pointer to multipart file", func(t *testing.T) {
var target struct {
Files []*multipart.FileHeader `form:"files"`
}
err := bindMultipartFiles(t, &target, filesA, filesB, file1)
assert.NoError(t, err)
assert.Len(t, target.Files, 2)
assertMultipartFileHeader(t, target.Files[0], filesA)
assertMultipartFileHeader(t, target.Files[1], filesB)
})
}
type testFormFile struct {
Fieldname string
Filename string
Content []byte
}
func createTestFormFile(formFieldName string, filename string) testFormFile {
return testFormFile{
Fieldname: formFieldName,
Filename: filename,
Content: []byte(strings.Repeat(filename, 10)),
}
}
func bindMultipartFiles(t *testing.T, target any, files ...testFormFile) error {
var body bytes.Buffer
mw := multipart.NewWriter(&body)
for _, file := range files {
fw, err := mw.CreateFormFile(file.Fieldname, file.Filename)
assert.NoError(t, err)
n, err := fw.Write(file.Content)
assert.NoError(t, err)
assert.Equal(t, len(file.Content), n)
}
err := mw.Close()
assert.NoError(t, err)
req, err := http.NewRequest(http.MethodPost, "/", &body)
assert.NoError(t, err)
req.Header.Set("Content-Type", mw.FormDataContentType())
rec := httptest.NewRecorder()
e := New()
c := e.NewContext(req, rec)
return c.Bind(target)
}
func assertMultipartFileHeader(t *testing.T, fh *multipart.FileHeader, file testFormFile) {
assert.Equal(t, file.Filename, fh.Filename)
assert.Equal(t, int64(len(file.Content)), fh.Size)
fl, err := fh.Open()
assert.NoError(t, err)
body, err := io.ReadAll(fl)
assert.NoError(t, err)
assert.Equal(t, string(file.Content), string(body))
err = fl.Close()
assert.NoError(t, err)
}