/
middlewares.go
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/
middlewares.go
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// Copyright (C) 2017, 2018, 2019 EGAAS S.A.
//
// 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 2 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
// General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
package api
import (
"fmt"
"net/http"
"runtime/debug"
"time"
"github.com/AplaProject/go-apla/packages/consts"
"github.com/AplaProject/go-apla/packages/service"
"github.com/AplaProject/go-apla/packages/statsd"
"github.com/gorilla/mux"
log "github.com/sirupsen/logrus"
)
func authRequire(next func(w http.ResponseWriter, r *http.Request)) func(w http.ResponseWriter, r *http.Request) {
return func(w http.ResponseWriter, r *http.Request) {
client := getClient(r)
if client != nil && client.KeyID != 0 {
next(w, r)
return
}
logger := getLogger(r)
logger.WithFields(log.Fields{"type": consts.EmptyObject}).Error("wallet is empty")
errorResponse(w, errUnauthorized)
}
}
func loggerFromRequest(r *http.Request) *log.Entry {
return log.WithFields(log.Fields{
"headers": r.Header,
"path": r.URL.Path,
"protocol": r.Proto,
"remote": r.RemoteAddr,
})
}
func loggerMiddleware(next http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
logger := loggerFromRequest(r)
logger.Info("received http request")
r = setLogger(r, logger)
next.ServeHTTP(w, r)
})
}
func recoverMiddleware(next http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
defer func() {
if err := recover(); err != nil {
logger := getLogger(r)
logger.WithFields(log.Fields{
"type": consts.PanicRecoveredError,
"error": err,
"stack": string(debug.Stack()),
}).Error("panic recovered error")
fmt.Println("API Recovered", fmt.Sprintf("%s: %s", err, debug.Stack()))
errorResponse(w, errRecovered)
}
}()
next.ServeHTTP(w, r)
})
}
func nodeStateMiddleware(next http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
var reason errType
switch service.NodePauseType() {
case service.NoPause:
next.ServeHTTP(w, r)
return
case service.PauseTypeUpdatingBlockchain:
reason = errUpdating
break
case service.PauseTypeStopingNetwork:
reason = errStopping
break
}
errorResponse(w, reason)
})
}
func tokenMiddleware(next http.Handler) http.Handler {
const authHeader = "AUTHORIZATION"
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
token, err := parseJWTToken(r.Header.Get(authHeader))
if err != nil {
logger := getLogger(r)
logger.WithFields(log.Fields{"type": consts.JWTError, "error": err}).Error("starting session")
}
if token != nil && token.Valid {
r = setToken(r, token)
}
next.ServeHTTP(w, r)
})
}
func (m Mode) clientMiddleware(next http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
token := getToken(r)
var client *Client
if token != nil { // get client from token
var err error
if client, err = getClientFromToken(token, m.EcosysNameGetter); err != nil {
errorResponse(w, err)
return
}
}
if client == nil {
// create client with default ecosystem
client = &Client{EcosystemID: 1}
}
r = setClient(r, client)
next.ServeHTTP(w, r)
})
}
func statsdMiddleware(next http.Handler) http.Handler {
const v = 1.0
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
route := mux.CurrentRoute(r)
counterName := statsd.APIRouteCounterName(r.Method, route.GetName())
statsd.Client.Inc(counterName+statsd.Count, 1, v)
startTime := time.Now()
defer func() {
statsd.Client.TimingDuration(counterName+statsd.Time, time.Since(startTime), v)
}()
next.ServeHTTP(w, r)
})
}