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package fastly
import (
"fmt"
"net/http"
"reflect"
"time"
"github.com/mitchellh/mapstructure"
)
// mapToHTTPHeaderHookFunc returns a function that converts maps into an
// http.Header value.
func mapToHTTPHeaderHookFunc() mapstructure.DecodeHookFunc {
return func(
f reflect.Type,
t reflect.Type,
data interface{}) (interface{}, error) {
if f.Kind() != reflect.Map {
return data, nil
}
if t != reflect.TypeOf(new(http.Header)) {
return data, nil
}
typed, ok := data.(map[string]interface{})
if !ok {
return nil, fmt.Errorf("cannot convert %T to http.Header", data)
}
n := map[string][]string{}
for k, v := range typed {
switch v.(type) {
case string:
n[k] = []string{v.(string)}
case []string:
n[k] = v.([]string)
case int, int8, int16, int32, int64:
n[k] = []string{fmt.Sprintf("%d", v.(int))}
case float32, float64:
n[k] = []string{fmt.Sprintf("%f", v.(float64))}
default:
return nil, fmt.Errorf("cannot convert %T to http.Header", v)
}
}
return n, nil
}
}
// stringToTimeHookFunc returns a function that converts strings to a time.Time
// value.
func stringToTimeHookFunc() mapstructure.DecodeHookFunc {
return func(
f reflect.Type,
t reflect.Type,
data interface{}) (interface{}, error) {
if f.Kind() != reflect.String {
return data, nil
}
if t != reflect.TypeOf(time.Now()) {
return data, nil
}
// Convert it by parsing
return time.Parse(time.RFC3339, data.(string))
}
}
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