Rainbond/api/middleware/middleware.go

314 lines
9.6 KiB
Go

// Copyright (C) 2014-2018 Goodrain Co., Ltd.
// RAINBOND, Application Management Platform
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version. For any non-GPL usage of Rainbond,
// one or multiple Commercial Licenses authorized by Goodrain Co., Ltd.
// must be obtained first.
// 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 General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package middleware
import (
"bytes"
"context"
"encoding/json"
"io/ioutil"
"net/http"
"strings"
"github.com/go-chi/chi"
"github.com/goodrain/rainbond/api/handler"
"github.com/goodrain/rainbond/api/util"
"github.com/goodrain/rainbond/db"
dbmodel "github.com/goodrain/rainbond/db/model"
"github.com/goodrain/rainbond/event"
httputil "github.com/goodrain/rainbond/util/http"
"github.com/jinzhu/gorm"
"github.com/sirupsen/logrus"
)
//ContextKey ctx key type
type ContextKey string
var pool []string
func init() {
pool = []string{
"services_status",
}
}
//InitTenant 实现中间件
func InitTenant(next http.Handler) http.Handler {
fn := func(w http.ResponseWriter, r *http.Request) {
debugRequestBody(r)
tenantName := chi.URLParam(r, "tenant_name")
if tenantName == "" {
httputil.ReturnError(r, w, 404, "cant find tenant")
return
}
tenant, err := db.GetManager().TenantDao().GetTenantIDByName(tenantName)
if err != nil {
logrus.Errorf("get tenant by tenantName error: %s %v", tenantName, err)
if err.Error() == gorm.ErrRecordNotFound.Error() {
httputil.ReturnError(r, w, 404, "cant find tenant")
return
}
httputil.ReturnError(r, w, 500, "get assign tenant uuid failed")
return
}
ctx := context.WithValue(r.Context(), ContextKey("tenant_name"), tenantName)
ctx = context.WithValue(ctx, ContextKey("tenant_id"), tenant.UUID)
ctx = context.WithValue(ctx, ContextKey("tenant"), tenant)
next.ServeHTTP(w, r.WithContext(ctx))
}
return http.HandlerFunc(fn)
}
//InitService 实现serviceinit中间件
func InitService(next http.Handler) http.Handler {
fn := func(w http.ResponseWriter, r *http.Request) {
serviceAlias := chi.URLParam(r, "service_alias")
if serviceAlias == "" {
httputil.ReturnError(r, w, 404, "cant find service alias")
return
}
tenantID := r.Context().Value(ContextKey("tenant_id"))
service, err := db.GetManager().TenantServiceDao().GetServiceByTenantIDAndServiceAlias(tenantID.(string), serviceAlias)
if err != nil {
if err.Error() == gorm.ErrRecordNotFound.Error() {
httputil.ReturnError(r, w, 404, "cant find service")
return
}
logrus.Errorf("get service by tenant & service alias error, %v", err)
httputil.ReturnError(r, w, 500, "get service id error")
return
}
serviceID := service.ServiceID
ctx := context.WithValue(r.Context(), ContextKey("service_alias"), serviceAlias)
ctx = context.WithValue(ctx, ContextKey("service_id"), serviceID)
ctx = context.WithValue(ctx, ContextKey("service"), service)
next.ServeHTTP(w, r.WithContext(ctx))
}
return http.HandlerFunc(fn)
}
// InitApplication -
func InitApplication(next http.Handler) http.Handler {
fn := func(w http.ResponseWriter, r *http.Request) {
appID := chi.URLParam(r, "app_id")
tenantApp, err := handler.GetApplicationHandler().GetAppByID(appID)
if err != nil {
httputil.ReturnBcodeError(r, w, err)
return
}
ctx := context.WithValue(r.Context(), ContextKey("app_id"), tenantApp.AppID)
ctx = context.WithValue(ctx, ContextKey("application"), tenantApp)
next.ServeHTTP(w, r.WithContext(ctx))
}
return http.HandlerFunc(fn)
}
//InitPlugin 实现plugin init中间件
func InitPlugin(next http.Handler) http.Handler {
fn := func(w http.ResponseWriter, r *http.Request) {
debugRequestBody(r)
pluginID := chi.URLParam(r, "plugin_id")
tenantID := r.Context().Value(ContextKey("tenant_id")).(string)
if pluginID == "" {
httputil.ReturnError(r, w, 404, "need plugin id")
return
}
_, err := db.GetManager().TenantPluginDao().GetPluginByID(pluginID, tenantID)
if err != nil {
if err.Error() == gorm.ErrRecordNotFound.Error() {
httputil.ReturnError(r, w, 404, "cant find plugin")
return
}
logrus.Errorf("get plugin error, %v", err)
httputil.ReturnError(r, w, 500, "get plugin error")
return
}
ctx := context.WithValue(r.Context(), ContextKey("plugin_id"), pluginID)
next.ServeHTTP(w, r.WithContext(ctx))
}
return http.HandlerFunc(fn)
}
//SetLog SetLog
func SetLog(next http.Handler) http.Handler {
fn := func(w http.ResponseWriter, r *http.Request) {
eventID := chi.URLParam(r, "event_id")
if eventID != "" {
logger := event.GetManager().GetLogger(eventID)
ctx := context.WithValue(r.Context(), ContextKey("logger"), logger)
next.ServeHTTP(w, r.WithContext(ctx))
}
}
return http.HandlerFunc(fn)
}
//Proxy 反向代理中间件
func Proxy(next http.Handler) http.Handler {
fn := func(w http.ResponseWriter, r *http.Request) {
if strings.HasPrefix(r.RequestURI, "/v2/nodes") {
handler.GetNodeProxy().Proxy(w, r)
return
}
if strings.HasPrefix(r.RequestURI, "/v2/cluster/service-health") {
handler.GetNodeProxy().Proxy(w, r)
return
}
if strings.HasPrefix(r.RequestURI, "/v2/builder") {
handler.GetBuilderProxy().Proxy(w, r)
return
}
if strings.HasPrefix(r.RequestURI, "/v2/tasks") {
handler.GetNodeProxy().Proxy(w, r)
return
}
if strings.HasPrefix(r.RequestURI, "/v2/tasktemps") {
handler.GetNodeProxy().Proxy(w, r)
return
}
if strings.HasPrefix(r.RequestURI, "/v2/taskgroups") {
handler.GetNodeProxy().Proxy(w, r)
return
}
if strings.HasPrefix(r.RequestURI, "/v2/configs") {
handler.GetNodeProxy().Proxy(w, r)
return
}
if strings.HasPrefix(r.RequestURI, "/v2/rules") {
handler.GetMonitorProxy().Proxy(w, r)
return
}
if strings.HasPrefix(r.RequestURI, "/kubernetes/dashboard") {
proxy := handler.GetKubernetesDashboardProxy()
r.URL.Path = strings.Replace(r.URL.Path, "/kubernetes/dashboard", "", 1)
proxy.Proxy(w, r)
return
}
next.ServeHTTP(w, r)
}
return http.HandlerFunc(fn)
}
func apiExclude(r *http.Request) bool {
if r.Method == "GET" {
return true
}
for _, item := range pool {
if strings.Contains(r.RequestURI, item) {
return true
}
}
return false
}
type resWriter struct {
origWriter http.ResponseWriter
statusCode int
}
func (w *resWriter) Header() http.Header {
return w.origWriter.Header()
}
func (w *resWriter) Write(p []byte) (int, error) {
return w.origWriter.Write(p)
}
func (w *resWriter) WriteHeader(statusCode int) {
w.statusCode = statusCode
w.origWriter.WriteHeader(statusCode)
}
// WrapEL wrap eventlog, handle event log before and after process
func WrapEL(f http.HandlerFunc, target, optType string, synType int) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
if r.Method != "GET" {
body, err := ioutil.ReadAll(r.Body)
if err != nil {
logrus.Warningf("error reading request body: %v", err)
} else {
logrus.Debugf("method: %s; uri: %s; body: %s", r.Method, r.RequestURI, string(body))
}
// set a new body, which will simulate the same data we read
r.Body = ioutil.NopCloser(bytes.NewBuffer(body))
var targetID string
var ok bool
if targetID, ok = r.Context().Value(ContextKey("service_id")).(string); !ok {
var reqDataMap map[string]interface{}
if err = json.Unmarshal(body, &reqDataMap); err != nil {
httputil.ReturnError(r, w, 400, "操作对象未指定")
return
}
if targetID, ok = reqDataMap["service_id"].(string); !ok {
httputil.ReturnError(r, w, 400, "操作对象未指定")
return
}
}
//eventLog check the latest event
if !util.CanDoEvent(optType, synType, target, targetID) {
logrus.Errorf("operation too frequently. uri: %s; target: %s; target id: %s", r.RequestURI, target, targetID)
httputil.ReturnError(r, w, 409, "操作过于频繁,请稍后再试") // status code 409 conflict
return
}
// handle operator
var operator string
var reqData map[string]interface{}
if err = json.Unmarshal(body, &reqData); err == nil {
if operatorI := reqData["operator"]; operatorI != nil {
operator = operatorI.(string)
}
}
// tenantID can not null
tenantID := r.Context().Value(ContextKey("tenant_id")).(string)
var ctx context.Context
event, err := util.CreateEvent(target, optType, targetID, tenantID, string(body), operator, synType)
if err != nil {
logrus.Error("create event error : ", err)
httputil.ReturnError(r, w, 500, "操作失败")
return
}
ctx = context.WithValue(r.Context(), ContextKey("event"), event)
ctx = context.WithValue(ctx, ContextKey("event_id"), event.EventID)
rw := &resWriter{origWriter: w}
f(rw, r.WithContext(ctx))
if synType == dbmodel.SYNEVENTTYPE || (synType == dbmodel.ASYNEVENTTYPE && rw.statusCode >= 400) { // status code 2XX/3XX all equal to success
util.UpdateEvent(event.EventID, rw.statusCode)
}
}
}
}
func debugRequestBody(r *http.Request) {
if !apiExclude(r) {
body, err := ioutil.ReadAll(r.Body)
if err != nil {
logrus.Warningf("error reading request body: %v", err)
}
logrus.Debugf("method: %s; uri: %s; body: %s", r.Method, r.RequestURI, string(body))
// set a new body, which will simulate the same data we read
r.Body = ioutil.NopCloser(bytes.NewBuffer(body))
}
}