bouncer/internal/rule/http/response.go
William Petit 05b547da48
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feat: rewriter layer
2024-06-25 16:50:29 +02:00

89 lines
1.7 KiB
Go

package http
import (
"fmt"
"net/http"
"strconv"
"strings"
"time"
"forge.cadoles.com/Cadoles/go-proxy/wildcard"
"github.com/expr-lang/expr"
)
func addResponseHeaderFunc(r *http.Response) expr.Option {
return expr.Function(
"add_header",
func(params ...any) (any, error) {
name := params[0].(string)
rawValue := params[1]
var value string
switch v := rawValue.(type) {
case []string:
value = strings.Join(v, ",")
case time.Time:
value = strconv.FormatInt(v.UTC().Unix(), 10)
case time.Duration:
value = strconv.FormatInt(int64(v.Seconds()), 10)
default:
value = fmt.Sprintf("%v", rawValue)
}
r.Header.Add(name, value)
return true, nil
},
new(func(string, string) bool),
)
}
func setResponseHeaderFunc(r *http.Response) expr.Option {
return expr.Function(
"set_header",
func(params ...any) (any, error) {
name := params[0].(string)
rawValue := params[1]
var value string
switch v := rawValue.(type) {
case []string:
value = strings.Join(v, ",")
case time.Time:
value = strconv.FormatInt(v.UTC().Unix(), 10)
case time.Duration:
value = strconv.FormatInt(int64(v.Seconds()), 10)
default:
value = fmt.Sprintf("%v", rawValue)
}
r.Header.Set(name, value)
return true, nil
},
new(func(string, string) bool),
)
}
func delResponseHeadersFunc(r *http.Response) expr.Option {
return expr.Function(
"del_headers",
func(params ...any) (any, error) {
pattern := params[0].(string)
deleted := false
for key := range r.Header {
if !wildcard.Match(key, pattern) {
continue
}
r.Header.Del(key)
deleted = true
}
return deleted, nil
},
new(func(string) bool),
)
}