/
message.go
119 lines (103 loc) · 2.22 KB
/
message.go
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// Copyright The OWASP Coraza contributors
// SPDX-License-Identifier: Apache-2.0
package internal
import (
"fmt"
"net"
spoe "github.com/criteo/haproxy-spoe-go"
)
type message struct {
msg *spoe.Message
args map[string]interface{}
}
func NewMessage(msg *spoe.Message) (*message, error) {
message := message{
msg: msg,
args: make(map[string]interface{}, msg.Args.Count()),
}
return &message, nil
}
func (m *message) findArg(name string) (interface{}, error) {
argVal, exist := m.args[name]
if exist {
return argVal, nil
}
ai := m.msg.Args
for ai.Next() {
m.args[ai.Arg.Name] = ai.Arg.Value
if ai.Arg.Name == name {
return ai.Arg.Value, nil
}
}
return nil, &ArgNotFoundError{name}
}
func (m *message) getStringArg(name string) (string, error) {
argVal, err := m.findArg(name)
if err != nil {
return "", err
}
if argVal == nil {
return "", nil
}
val, ok := argVal.(string)
if !ok {
return "", &typeMismatchError{name, "string", argVal}
}
return val, nil
}
func (m *message) getIntArg(name string) (int, error) {
argVal, err := m.findArg(name)
if err != nil {
return 0, err
}
if argVal == nil {
return 0, nil
}
val, ok := argVal.(int)
if !ok {
return 0, &typeMismatchError{name, "int", argVal}
}
return val, nil
}
func (m *message) getByteArrayArg(name string) ([]byte, error) {
argVal, err := m.findArg(name)
if err != nil {
return nil, err
}
if argVal == nil {
return nil, nil
}
val, ok := argVal.([]byte)
if !ok {
return nil, &typeMismatchError{name, "[]byte", argVal}
}
return val, nil
}
func (m *message) getIpArg(name string) (net.IP, error) {
argVal, err := m.findArg(name)
if err != nil {
return nil, err
}
if argVal == nil {
return nil, nil
}
val, ok := argVal.(net.IP)
if !ok {
return nil, &typeMismatchError{name, "net.IP", argVal}
}
return val, nil
}
type ArgNotFoundError struct {
argName string
}
func (e *ArgNotFoundError) Error() string {
return fmt.Sprintf("Argument '%s' not found", e.argName)
}
type typeMismatchError struct {
key string
expectedType string
actualValue interface{}
}
func (e *typeMismatchError) Error() string {
return fmt.Sprintf("Invalid argument for %s, %s expected, got %T", e.key, e.expectedType, e.actualValue)
}