74 lines
1.4 KiB
Go
74 lines
1.4 KiB
Go
package router
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import (
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"fmt"
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"reflect"
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"strings"
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)
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type Header map[string][]string
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func (h Header) Parse(data any) {
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if h == nil {
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h = make(Header)
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}
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d := reflect.ValueOf(data)
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if d.Kind() != reflect.Struct {
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panic(fmt.Errorf("expected struct input for data"))
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}
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for i := 0; i < d.NumField(); i++ {
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key, ok := d.Type().Field(i).Tag.Lookup("header")
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if !ok || key == "" {
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continue
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}
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v := make([]string, 0)
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val := d.Field(i)
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if val.Kind() == reflect.Pointer || val.Kind() == reflect.Interface {
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val = val.Elem()
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}
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if val.Kind() == reflect.Slice || val.Kind() == reflect.Array {
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for j := 0; j < val.Len(); j++ {
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item := val.Index(j)
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if item.Kind() == reflect.Pointer || item.Kind() == reflect.Interface {
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item = item.Elem()
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}
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v = append(v, fmt.Sprintf("%s", item.Interface()))
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}
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} else {
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v = append(v, fmt.Sprintf("%s", val.Interface()))
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}
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h[key] = v
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}
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}
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func (h Header) Get(key string) (value string) {
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v, ok := h[key]
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if !ok {
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return
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}
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return strings.Join(v, ", ")
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}
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func (h Header) Set(key string, value string) {
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h[key] = []string{value}
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}
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func (h Header) Add(key string, value string) {
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h[key] = append(h[key], value)
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}
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func (h Header) Merge(header Header) {
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for key, value := range header {
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if _, exists := h[key]; exists {
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continue
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}
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h[key] = value
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}
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}
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func (h Header) MergeOverwrite(header Header) {
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for key, value := range header {
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h[key] = value
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}
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}
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