/
inet_rest_client.go
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/
inet_rest_client.go
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// Copyright (c) 2021 Terminus, Inc.
//
// Licensed 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 restclient
import (
"os"
"strings"
"github.com/pkg/errors"
"k8s.io/apimachinery/pkg/types"
"k8s.io/client-go/kubernetes"
. "k8s.io/client-go/rest"
)
var (
ErrAddrMiss = Error{"customhttp: inetaddr miss"}
ErrInvalidAddr = Error{"customhttp: invalid inetaddr"}
)
type Error struct {
msg string
}
func (e Error) Error() string {
return e.msg
}
var inetAddr string
// 用于获取netportal地址的环境变量名
const (
netportalAddrEnvVarName = "NETPORTAL_ADDR"
portalPassthroughHeader = "X-Portal-Passthrough"
portalDirectHeader = "X-Portal-Direct"
portalSSLHeader = "X-Portal-SSL"
portalSSEHeader = "X-Portal-SSE"
portalWSHeader = "X-Portal-Websocket"
portalHostHeader = "X-Portal-Host"
portalDestHeader = "X-Portal-Dest"
)
type InetRESTClient struct {
*RESTClient
inetHeaders map[string]string
}
func NewClientSet(addr string, config *Config) (*kubernetes.Clientset, error) {
inetClient, err := NewInetRESTClient(addr, config)
if err != nil {
return nil, err
}
return kubernetes.New(inetClient), nil
}
// 用于覆盖根据环境变量取的值
func SetInetAddr(addr string) {
inetAddr = addr
}
func init() {
inetAddr = os.Getenv(netportalAddrEnvVarName)
}
func parseInetUrl(url string) (portalHost string, portalDest string, portalUrl string, portalArgs map[string]string, err error) {
url = strings.TrimPrefix(url, "inet://")
url = strings.Replace(url, "//", "/", -1)
portalArgs = map[string]string{}
parts := strings.SplitN(url, "/", 3)
if len(parts) < 2 {
err = errors.Wrapf(ErrInvalidAddr, "addr:%s", url)
return
}
portalHost = parts[0]
portalDest = parts[1]
portalUrl = ""
if len(parts) > 2 {
portalUrl = parts[2]
}
portalArgsPos := strings.Index(portalHost, "?")
if portalArgsPos == -1 {
return
}
argStr := portalHost[portalArgsPos+1:]
portalHost = portalHost[:portalArgsPos]
argPairs := strings.Split(argStr, "&")
for _, pair := range argPairs {
argParts := strings.Split(pair, "=")
if len(argParts) == 2 {
portalArgs[argParts[0]] = argParts[1]
}
}
return
}
func NewInetRESTClient(addr string, config *Config) (*InetRESTClient, error) {
var restClient *RESTClient
var err error
if !strings.HasPrefix(addr, "inet://") {
config.Host = addr
if config.GroupVersion == nil {
restClient, err = UnversionedRESTClientFor(config)
} else {
restClient, err = RESTClientFor(config)
}
if err != nil {
return nil, errors.WithStack(err)
}
return &InetRESTClient{
RESTClient: restClient,
}, nil
}
if inetAddr == "" {
return nil, errors.WithStack(ErrAddrMiss)
}
inetAddr = strings.TrimPrefix(inetAddr, "http://")
portalHost, portalDest, _, portalArgs, err := parseInetUrl(addr)
if err != nil {
return nil, err
}
config.Host = inetAddr
if config.GroupVersion == nil {
restClient, err = UnversionedRESTClientFor(config)
} else {
restClient, err = RESTClientFor(config)
}
if err != nil {
return nil, errors.WithStack(err)
}
inetClient := &InetRESTClient{
RESTClient: restClient,
inetHeaders: map[string]string{},
}
inetClient.inetHeaders[portalHostHeader] = portalHost
inetClient.inetHeaders[portalDestHeader] = portalDest
if portalArgs["direct"] == "on" {
inetClient.inetHeaders[portalDirectHeader] = "on"
}
if portalArgs["ssl"] == "on" {
inetClient.inetHeaders[portalSSLHeader] = "on"
}
if portalArgs["passthrough"] == "on" {
inetClient.inetHeaders[portalPassthroughHeader] = "on"
}
return inetClient, nil
}
func (c *InetRESTClient) Get() *Request {
return c.Verb("GET")
}
func (c *InetRESTClient) Post() *Request {
return c.Verb("POST")
}
func (c *InetRESTClient) Put() *Request {
return c.Verb("PUT")
}
func (c *InetRESTClient) Patch(pt types.PatchType) *Request {
return c.Verb("PATCH").SetHeader("Content-Type", string(pt))
}
func (c *InetRESTClient) Delete() *Request {
return c.Verb("DELETE")
}
func (c *InetRESTClient) Verb(verb string) *Request {
req := c.RESTClient.Verb(verb)
for key, value := range c.inetHeaders {
req.SetHeader(key, value)
}
return req
}