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proxy.go
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proxy.go
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// This file is part of MinIO Console Server
// Copyright (c) 2021 MinIO, Inc.
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package operatorapi
import (
"bytes"
"crypto/sha1"
"encoding/json"
"errors"
"fmt"
"io"
"log"
"net/http"
"net/http/cookiejar"
url2 "net/url"
"strings"
"time"
"github.com/minio/websocket"
v2 "github.com/minio/operator/pkg/apis/minio.min.io/v2"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"github.com/minio/console/cluster"
"github.com/minio/console/restapi"
"github.com/minio/console/pkg/auth"
)
func serveProxy(responseWriter http.ResponseWriter, req *http.Request) {
urlParts := strings.Split(req.URL.Path, "/")
// Either proxy or hop, will decide the type of session
proxyMethod := urlParts[2]
if len(urlParts) < 5 {
log.Println(len(urlParts))
return
}
namespace := urlParts[3]
tenantName := urlParts[4]
// validate the tenantName
token, err := auth.GetTokenFromRequest(req)
if err != nil {
log.Println(err)
responseWriter.WriteHeader(401)
return
}
claims, err := auth.SessionTokenAuthenticate(token)
if err != nil {
log.Printf("Unable to validate the session token %s: %v\n", token, err)
responseWriter.WriteHeader(401)
return
}
STSSessionToken := claims.STSSessionToken
opClientClientSet, err := cluster.OperatorClient(STSSessionToken)
if err != nil {
log.Println(err)
responseWriter.WriteHeader(404)
return
}
opClient := operatorClient{
client: opClientClientSet,
}
tenant, err := opClient.TenantGet(req.Context(), namespace, tenantName, metav1.GetOptions{})
if err != nil {
log.Println(err)
responseWriter.WriteHeader(502)
return
}
nsTenant := fmt.Sprintf("%s/%s", tenant.Namespace, tenant.Name)
tenantSchema := "http"
tenantPort := fmt.Sprintf(":%d", v2.ConsolePort)
if tenant.AutoCert() || tenant.ExternalCert() {
tenantSchema = "https"
tenantPort = fmt.Sprintf(":%d", v2.ConsoleTLSPort)
}
tenantURL := fmt.Sprintf("%s://%s.%s.svc.%s%s", tenantSchema, tenant.ConsoleCIServiceName(), tenant.Namespace, v2.GetClusterDomain(), tenantPort)
// for development
// tenantURL = "http://localhost:9091"
// tenantURL = "https://localhost:9443"
h := sha1.New()
h.Write([]byte(nsTenant))
tenantCookieName := fmt.Sprintf("token-%s-%s-%x", proxyMethod, claims.AccountAccessKey, string(h.Sum(nil)))
tenantCookie, err := req.Cookie(tenantCookieName)
if err != nil {
// login to tenantName
loginURL := fmt.Sprintf("%s/api/v1/login", tenantURL)
// get the tenant credentials
clientSet, err := cluster.K8sClient(STSSessionToken)
if err != nil {
log.Println(err)
responseWriter.WriteHeader(500)
return
}
k8sClient := k8sClient{
client: clientSet,
}
tenantConfiguration, err := GetTenantConfiguration(req.Context(), &k8sClient, tenant)
if err != nil {
log.Println(err)
responseWriter.WriteHeader(500)
return
}
data := map[string]interface{}{
"accessKey": tenantConfiguration["accesskey"],
"secretKey": tenantConfiguration["secretkey"],
}
// if this a proxy request hide the menu
if proxyMethod == "proxy" {
data["features"] = map[string]bool{
"hide_menu": true,
}
}
payload, _ := json.Marshal(data)
loginReq, err := http.NewRequest(http.MethodPost, loginURL, bytes.NewReader(payload))
if err != nil {
log.Println(err)
responseWriter.WriteHeader(500)
return
}
loginReq.Header.Add("Content-Type", "application/json")
// use localhost to ensure 'InsecureSkipVerify'
client := restapi.GetConsoleHTTPClient("http://127.0.0.1")
loginResp, err := client.Do(loginReq)
if err != nil {
log.Println(err)
responseWriter.WriteHeader(500)
return
}
if loginResp.StatusCode < 200 && loginResp.StatusCode <= 299 {
log.Println(fmt.Printf("Status: %d. Couldn't complete login", loginResp.StatusCode))
responseWriter.WriteHeader(500)
return
}
for _, c := range loginResp.Cookies() {
if c.Name == "token" {
tenantCookie = c
c := &http.Cookie{
Name: tenantCookieName,
Value: c.Value,
Path: c.Path,
Expires: c.Expires,
HttpOnly: c.HttpOnly,
}
http.SetCookie(responseWriter, c)
break
}
}
defer loginResp.Body.Close()
}
if tenantCookie == nil {
log.Println(errors.New("couldn't login to tenant and get cookie"))
responseWriter.WriteHeader(403)
return
}
// at this point we have a valid cookie ready to either route HTTP or WS
// now we need to know if we are doing an /api/ call (http) or /ws/ call (ws)
callType := urlParts[5]
targetURL, err := url2.Parse(tenantURL)
if err != nil {
log.Println(err)
responseWriter.WriteHeader(500)
return
}
tenantBase := fmt.Sprintf("/api/%s/%s/%s", proxyMethod, tenant.Namespace, tenant.Name)
targetURL.Path = strings.ReplaceAll(req.URL.Path, tenantBase, "")
proxiedCookie := &http.Cookie{
Name: "token",
Value: tenantCookie.Value,
Path: tenantCookie.Path,
Expires: tenantCookie.Expires,
HttpOnly: tenantCookie.HttpOnly,
}
proxyCookieJar, _ := cookiejar.New(nil)
proxyCookieJar.SetCookies(targetURL, []*http.Cookie{proxiedCookie})
switch callType {
case "ws":
handleWSRequest(responseWriter, req, proxyCookieJar, targetURL, tenantSchema)
default:
handleHTTPRequest(responseWriter, req, proxyCookieJar, tenantBase, targetURL)
}
}
func handleHTTPRequest(responseWriter http.ResponseWriter, req *http.Request, proxyCookieJar *cookiejar.Jar, tenantBase string, targetURL *url2.URL) {
// use localhost to ensure 'InsecureSkipVerify'
client := restapi.GetConsoleHTTPClient("http://127.0.0.1")
client.Jar = proxyCookieJar
client.CheckRedirect = func(req *http.Request, via []*http.Request) error {
return http.ErrUseLastResponse
}
// are we proxying something with cp=y? (console proxy) then add cpb (console proxy base) so the console
// on the other side updates the <base href="" /> to this value overriding sub path or root
if v := req.URL.Query().Get("cp"); v == "y" {
q := req.URL.Query()
q.Add("cpb", tenantBase)
req.URL.RawQuery = q.Encode()
}
// copy query params
targetURL.RawQuery = req.URL.Query().Encode()
proxRequest, err := http.NewRequest(req.Method, targetURL.String(), req.Body)
if err != nil {
log.Println(err)
responseWriter.WriteHeader(500)
return
}
for _, v := range req.Header.Values("Content-Type") {
proxRequest.Header.Add("Content-Type", v)
}
resp, err := client.Do(proxRequest)
if err != nil {
log.Println(err)
responseWriter.WriteHeader(500)
return
}
for hk, hv := range resp.Header {
if hk != "X-Frame-Options" {
for _, v := range hv {
responseWriter.Header().Add(hk, v)
}
}
}
// Allow iframes
responseWriter.Header().Set("X-Frame-Options", "SAMEORIGIN")
responseWriter.Header().Set("X-XSS-Protection", "1; mode=block")
// Pass HTTP status code to proxy response
responseWriter.WriteHeader(resp.StatusCode)
io.Copy(responseWriter, resp.Body)
}
var upgrader = websocket.Upgrader{
ReadBufferSize: 0,
WriteBufferSize: 1024,
}
func handleWSRequest(responseWriter http.ResponseWriter, req *http.Request, proxyCookieJar *cookiejar.Jar, targetURL *url2.URL, schema string) {
dialer := &websocket.Dialer{
Proxy: http.ProxyFromEnvironment,
HandshakeTimeout: 45 * time.Second,
Jar: proxyCookieJar,
}
upgrader.CheckOrigin = func(r *http.Request) bool {
return true
}
c, err := upgrader.Upgrade(responseWriter, req, nil)
if err != nil {
log.Print("error upgrade connection:", err)
return
}
defer c.Close()
if schema == "http" {
targetURL.Scheme = "ws"
} else {
targetURL.Scheme = "wss"
}
// establish a websocket to the tenant
tenantConn, _, err := dialer.Dial(targetURL.String(), nil)
if err != nil {
log.Println("dial:", err)
return
}
defer tenantConn.Close()
doneTenant := make(chan struct{})
done := make(chan struct{})
// start read pump from tenant connection
go func() {
defer close(doneTenant)
for {
msgType, message, err := tenantConn.ReadMessage()
if err != nil {
log.Println("error read from tenant:", err)
return
}
c.WriteMessage(msgType, message)
}
}()
// start read pump from tenant connection
go func() {
defer close(done)
for {
msgType, message, err := c.ReadMessage()
if err != nil {
log.Println("error read from client:", err)
return
}
tenantConn.WriteMessage(msgType, message)
}
}()
select {
case <-done:
case <-doneTenant:
}
}