/
check_data.go
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/
check_data.go
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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package http
import (
"encoding/base64"
"mosn.io/mosn/pkg/istio/utils"
"mosn.io/mosn/pkg/types"
)
// CheckData extract HTTP data for Mixer check
type CheckData interface {
// Find "x-istio-attributes" HTTP header.
// If found, base64 decode its value, pass it out
ExtractIstioAttributes() (data string, ret bool)
// Get downstream tcp connection ip and port.
GetSourceIPPort() (ip string, port int32, ret bool)
}
type checkData struct {
reqHeaders types.HeaderMap
requestInfo types.RequestInfo
}
// NewCheckData return checkData
func NewCheckData(reqHeaders types.HeaderMap, requestInfo types.RequestInfo) CheckData {
return &checkData{
reqHeaders: reqHeaders,
requestInfo: requestInfo,
}
}
// ExtractIstioAttributes Find "x-istio-attributes" HTTP header.
// If found, base64 decode its value, pass it out
func (c *checkData) ExtractIstioAttributes() (data string, ret bool) {
val, ret := c.reqHeaders.Get(utils.KIstioAttributeHeader)
if ret {
d, _ := base64.StdEncoding.DecodeString(val)
data = string(d)
}
return
}
// GetSourceIPPort get downstream tcp connection ip and port.
func (c *checkData) GetSourceIPPort() (ip string, port int32, ret bool) {
addr := c.requestInfo.DownstreamLocalAddress()
if addr == nil {
ret = false
return
}
ip, port, ret = utils.GetIPPort(addr)
return
}