mirror of
https://github.com/superseriousbusiness/gotosocial.git
synced 2024-11-24 04:36:38 +00:00
f518f649f8
* Add go-playground/form pkg * [feature] Add support for profile fields * Add field attributes test * Validate profile fields form * Add profile field validation tests * Add Field Attributes definition to swagger --------- Co-authored-by: tobi <31960611+tsmethurst@users.noreply.github.com>
276 lines
7.9 KiB
Go
276 lines
7.9 KiB
Go
/*
|
|
Package form Decodes url.Values into Go value(s) and Encodes Go value(s) into url.Values.
|
|
|
|
|
|
It has the following features:
|
|
|
|
- Primitives types cause zero allocations.
|
|
- Supports map of almost all types.
|
|
- Supports both Numbered and Normal arrays eg. "Array[0]" and just "Array"
|
|
with multiple values passed.
|
|
- Slice honours the specified index. eg. if "Slice[2]" is the only Slice
|
|
value passed down, it will be put at index 2; if slice isn't big enough
|
|
it will be expanded.
|
|
- Array honours the specified index. eg. if "Array[2]" is the only Array
|
|
value passed down, it will be put at index 2; if array isn't big enough
|
|
a warning will be printed and value ignored.
|
|
- Only creates objects as necessary eg. if no `array` or `map` values are
|
|
passed down, the `array` and `map` are left as their default values in
|
|
the struct.
|
|
- Allows for Custom Type registration.
|
|
- Handles time.Time using RFC3339 time format by default,
|
|
but can easily be changed by registering a Custom Type, see below.
|
|
- Handles Encoding & Decoding of almost all Go types eg. can Decode into
|
|
struct, array, map, int... and Encode a struct, array, map, int...
|
|
|
|
Common Questions
|
|
|
|
Questions
|
|
|
|
Does it support encoding.TextUnmarshaler?
|
|
No because TextUnmarshaler only accepts []byte but posted values can have
|
|
multiple values, so is not suitable.
|
|
|
|
Mixing array/slice with array[idx]/slice[idx], in which order are they parsed?
|
|
array/slice then array[idx]/slice[idx]
|
|
|
|
Supported Types
|
|
|
|
out of the box supported types
|
|
|
|
- string
|
|
- bool
|
|
- int, int8, int16, int32, int64
|
|
- uint, uint8, uint16, uint32, uint64
|
|
- float32, float64
|
|
- struct and anonymous struct
|
|
- interface{}
|
|
- time.Time` - by default using RFC3339
|
|
- a `pointer` to one of the above types
|
|
- slice, array
|
|
- map
|
|
- `custom types` can override any of the above types
|
|
- many other types may be supported inherently (eg. bson.ObjectId is
|
|
type ObjectId string, which will get populated by the string type
|
|
|
|
**NOTE**: map, struct and slice nesting are ad infinitum.
|
|
|
|
Usage
|
|
|
|
symbols
|
|
|
|
- Use symbol `.` for separating fields/structs. (eg. `structfield.field`)
|
|
- Use `[index or key]` for access to index of a slice/array or key for map.
|
|
(eg. `arrayfield[0]`, `mapfield[keyvalue]`)
|
|
|
|
html
|
|
|
|
<form method="POST">
|
|
<input type="text" name="Name" value="joeybloggs"/>
|
|
<input type="text" name="Age" value="3"/>
|
|
<input type="text" name="Gender" value="Male"/>
|
|
<input type="text" name="Address[0].Name" value="26 Here Blvd."/>
|
|
<input type="text" name="Address[0].Phone" value="9(999)999-9999"/>
|
|
<input type="text" name="Address[1].Name" value="26 There Blvd."/>
|
|
<input type="text" name="Address[1].Phone" value="1(111)111-1111"/>
|
|
<input type="text" name="active" value="true"/>
|
|
<input type="text" name="MapExample[key]" value="value"/>
|
|
<input type="text" name="NestedMap[key][key]" value="value"/>
|
|
<input type="text" name="NestedArray[0][0]" value="value"/>
|
|
<input type="submit"/>
|
|
</form>
|
|
|
|
Example
|
|
|
|
example decoding the above HTML
|
|
|
|
package main
|
|
|
|
import (
|
|
"fmt"
|
|
"log"
|
|
"net/url"
|
|
|
|
"github.com/go-playground/form/v4"
|
|
)
|
|
|
|
// Address contains address information
|
|
type Address struct {
|
|
Name string
|
|
Phone string
|
|
}
|
|
|
|
// User contains user information
|
|
type User struct {
|
|
Name string
|
|
Age uint8
|
|
Gender string
|
|
Address []Address
|
|
Active bool `form:"active"`
|
|
MapExample map[string]string
|
|
NestedMap map[string]map[string]string
|
|
NestedArray [][]string
|
|
}
|
|
|
|
// use a single instance of Decoder, it caches struct info
|
|
var decoder *form.Decoder
|
|
|
|
func main() {
|
|
decoder = form.NewDecoder()
|
|
|
|
// this simulates the results of http.Request's ParseForm() function
|
|
values := parseForm()
|
|
|
|
var user User
|
|
|
|
// must pass a pointer
|
|
err := decoder.Decode(&user, values)
|
|
if err != nil {
|
|
log.Panic(err)
|
|
}
|
|
|
|
fmt.Printf("%#v\n", user)
|
|
}
|
|
|
|
// this simulates the results of http.Request's ParseForm() function
|
|
func parseForm() url.Values {
|
|
return url.Values{
|
|
"Name": []string{"joeybloggs"},
|
|
"Age": []string{"3"},
|
|
"Gender": []string{"Male"},
|
|
"Address[0].Name": []string{"26 Here Blvd."},
|
|
"Address[0].Phone": []string{"9(999)999-9999"},
|
|
"Address[1].Name": []string{"26 There Blvd."},
|
|
"Address[1].Phone": []string{"1(111)111-1111"},
|
|
"active": []string{"true"},
|
|
"MapExample[key]": []string{"value"},
|
|
"NestedMap[key][key]": []string{"value"},
|
|
"NestedArray[0][0]": []string{"value"},
|
|
}
|
|
}
|
|
|
|
example encoding
|
|
|
|
package main
|
|
|
|
import (
|
|
"fmt"
|
|
"log"
|
|
|
|
"github.com/go-playground/form/v4"
|
|
)
|
|
|
|
// Address contains address information
|
|
type Address struct {
|
|
Name string
|
|
Phone string
|
|
}
|
|
|
|
// User contains user information
|
|
type User struct {
|
|
Name string
|
|
Age uint8
|
|
Gender string
|
|
Address []Address
|
|
Active bool `form:"active"`
|
|
MapExample map[string]string
|
|
NestedMap map[string]map[string]string
|
|
NestedArray [][]string
|
|
}
|
|
|
|
// use a single instance of Encoder, it caches struct info
|
|
var encoder *form.Encoder
|
|
|
|
func main() {
|
|
encoder = form.NewEncoder()
|
|
|
|
user := User{
|
|
Name: "joeybloggs",
|
|
Age: 3,
|
|
Gender: "Male",
|
|
Address: []Address{
|
|
{Name: "26 Here Blvd.", Phone: "9(999)999-9999"},
|
|
{Name: "26 There Blvd.", Phone: "1(111)111-1111"},
|
|
},
|
|
Active: true,
|
|
MapExample: map[string]string{"key": "value"},
|
|
NestedMap: map[string]map[string]string{"key": {"key": "value"}},
|
|
NestedArray: [][]string{{"value"}},
|
|
}
|
|
|
|
// must pass a pointer
|
|
values, err := encoder.Encode(&user)
|
|
if err != nil {
|
|
log.Panic(err)
|
|
}
|
|
|
|
fmt.Printf("%#v\n", values)
|
|
}
|
|
|
|
|
|
Registering Custom Types
|
|
|
|
Decoder
|
|
|
|
decoder.RegisterCustomTypeFunc(func(vals []string) (interface{}, error) {
|
|
return time.Parse("2006-01-02", vals[0])
|
|
}, time.Time{})
|
|
|
|
ADDITIONAL: if a struct type is registered, the function will only be called
|
|
if a url.Value exists for the struct and not just the struct fields
|
|
eg. url.Values{"User":"Name%3Djoeybloggs"} will call the custom type function
|
|
with 'User' as the type, however url.Values{"User.Name":"joeybloggs"} will not.
|
|
|
|
Encoder
|
|
|
|
encoder.RegisterCustomTypeFunc(func(x interface{}) ([]string, error) {
|
|
return []string{x.(time.Time).Format("2006-01-02")}, nil
|
|
}, time.Time{})
|
|
|
|
|
|
Ignoring Fields
|
|
|
|
you can tell form to ignore fields using `-` in the tag
|
|
|
|
type MyStruct struct {
|
|
Field string `form:"-"`
|
|
}
|
|
|
|
Omitempty
|
|
|
|
you can tell form to omit empty fields using `,omitempty` or `FieldName,omitempty` in the tag
|
|
|
|
type MyStruct struct {
|
|
Field string `form:",omitempty"`
|
|
Field2 string `form:"CustomFieldName,omitempty"`
|
|
}
|
|
|
|
|
|
Notes
|
|
|
|
To maximize compatibility with other systems the Encoder attempts
|
|
to avoid using array indexes in url.Values if at all possible.
|
|
|
|
eg.
|
|
|
|
// A struct field of
|
|
Field []string{"1", "2", "3"}
|
|
|
|
// will be output a url.Value as
|
|
"Field": []string{"1", "2", "3"}
|
|
|
|
and not
|
|
"Field[0]": []string{"1"}
|
|
"Field[1]": []string{"2"}
|
|
"Field[2]": []string{"3"}
|
|
|
|
// however there are times where it is unavoidable, like with pointers
|
|
i := int(1)
|
|
Field []*string{nil, nil, &i}
|
|
|
|
// to avoid index 1 and 2 must use index
|
|
"Field[2]": []string{"1"}
|
|
|
|
*/
|
|
package form
|