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package weed_server
import (
"context"
"errors"
"net/http"
"os"
"strconv"
"strings"
"sync/atomic"
"time"
"github.com/seaweedfs/seaweedfs/weed/filer"
"github.com/seaweedfs/seaweedfs/weed/util/log"
"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"
"github.com/seaweedfs/seaweedfs/weed/security"
"github.com/seaweedfs/seaweedfs/weed/util"
"github.com/seaweedfs/seaweedfs/weed/stats"
)
func (fs *FilerServer) filerHandler(w http.ResponseWriter, r *http.Request) {
start := time.Now()
inFlightGauge := stats.FilerInFlightRequestsGauge.WithLabelValues(r.Method)
inFlightGauge.Inc()
defer inFlightGauge.Dec()
statusRecorder := stats.NewStatusResponseWriter(w)
w = statusRecorder
origin := r.Header.Get("Origin")
if origin != "" {
if fs.option.AllowedOrigins == nil || len(fs.option.AllowedOrigins) == 0 || fs.option.AllowedOrigins[0] == "*" {
origin = "*"
} else {
originFound := false
for _, allowedOrigin := range fs.option.AllowedOrigins {
if origin == allowedOrigin {
originFound = true
}
}
if !originFound {
writeJsonError(w, r, http.StatusForbidden, errors.New("origin not allowed"))
return
}
}
w.Header().Set("Access-Control-Allow-Origin", origin)
w.Header().Set("Access-Control-Expose-Headers", "*")
w.Header().Set("Access-Control-Allow-Headers", "*")
w.Header().Set("Access-Control-Allow-Credentials", "true")
w.Header().Set("Access-Control-Allow-Methods", "PUT, POST, GET, DELETE, OPTIONS")
}
if r.Method == http.MethodOptions {
OptionsHandler(w, r, false)
return
}
// proxy to volume servers
var fileId string
if strings.HasPrefix(r.RequestURI, "/?proxyChunkId=") {
fileId = r.RequestURI[len("/?proxyChunkId="):]
}
if fileId != "" {
fs.proxyToVolumeServer(w, r, fileId)
stats.FilerHandlerCounter.WithLabelValues(stats.ChunkProxy).Inc()
stats.FilerRequestHistogram.WithLabelValues(stats.ChunkProxy).Observe(time.Since(start).Seconds())
return
}
requestMethod := r.Method
defer func(method *string) {
stats.FilerRequestCounter.WithLabelValues(*method, strconv.Itoa(statusRecorder.Status)).Inc()
stats.FilerRequestHistogram.WithLabelValues(*method).Observe(time.Since(start).Seconds())
}(&requestMethod)
isReadHttpCall := r.Method == http.MethodGet || r.Method == http.MethodHead
if !fs.maybeCheckJwtAuthorization(r, !isReadHttpCall) {
writeJsonError(w, r, http.StatusUnauthorized, errors.New("wrong jwt"))
return
}
w.Header().Set("Server", "SeaweedFS "+util.VERSION)
switch r.Method {
case http.MethodGet, http.MethodHead:
fs.GetOrHeadHandler(w, r)
case http.MethodDelete:
if _, ok := r.URL.Query()["tagging"]; ok {
fs.DeleteTaggingHandler(w, r)
} else {
fs.DeleteHandler(w, r)
}
case http.MethodPost, http.MethodPut:
// wait until in flight data is less than the limit
contentLength := getContentLength(r)
fs.inFlightDataLimitCond.L.Lock()
inFlightDataSize := atomic.LoadInt64(&fs.inFlightDataSize)
for fs.option.ConcurrentUploadLimit != 0 && inFlightDataSize > fs.option.ConcurrentUploadLimit {
log.V(-1).Infof("wait because inflight data %d > %d", inFlightDataSize, fs.option.ConcurrentUploadLimit)
fs.inFlightDataLimitCond.Wait()
inFlightDataSize = atomic.LoadInt64(&fs.inFlightDataSize)
}
fs.inFlightDataLimitCond.L.Unlock()
atomic.AddInt64(&fs.inFlightDataSize, contentLength)
defer func() {
atomic.AddInt64(&fs.inFlightDataSize, -contentLength)
fs.inFlightDataLimitCond.Signal()
}()
if r.Method == http.MethodPut {
if _, ok := r.URL.Query()["tagging"]; ok {
fs.PutTaggingHandler(w, r)
} else {
fs.PostHandler(w, r, contentLength)
}
} else { // method == "POST"
fs.PostHandler(w, r, contentLength)
}
default:
requestMethod = "INVALID"
w.WriteHeader(http.StatusMethodNotAllowed)
}
}
func (fs *FilerServer) readonlyFilerHandler(w http.ResponseWriter, r *http.Request) {
start := time.Now()
statusRecorder := stats.NewStatusResponseWriter(w)
w = statusRecorder
os.Stdout.WriteString("Request: " + r.Method + " " + r.URL.String() + "\n")
origin := r.Header.Get("Origin")
if origin != "" {
if fs.option.AllowedOrigins == nil || len(fs.option.AllowedOrigins) == 0 || fs.option.AllowedOrigins[0] == "*" {
origin = "*"
} else {
originFound := false
for _, allowedOrigin := range fs.option.AllowedOrigins {
if origin == allowedOrigin {
originFound = true
}
}
if !originFound {
writeJsonError(w, r, http.StatusForbidden, errors.New("origin not allowed"))
return
}
}
w.Header().Set("Access-Control-Allow-Origin", origin)
w.Header().Set("Access-Control-Allow-Headers", "OPTIONS, GET, HEAD")
w.Header().Set("Access-Control-Allow-Credentials", "true")
}
requestMethod := r.Method
defer func(method *string) {
stats.FilerRequestCounter.WithLabelValues(*method, strconv.Itoa(statusRecorder.Status)).Inc()
stats.FilerRequestHistogram.WithLabelValues(*method).Observe(time.Since(start).Seconds())
}(&requestMethod)
// We handle OPTIONS first because it never should be authenticated
if r.Method == http.MethodOptions {
OptionsHandler(w, r, true)
return
}
if !fs.maybeCheckJwtAuthorization(r, false) {
writeJsonError(w, r, http.StatusUnauthorized, errors.New("wrong jwt"))
return
}
w.Header().Set("Server", "SeaweedFS "+util.VERSION)
switch r.Method {
case http.MethodGet, http.MethodHead:
fs.GetOrHeadHandler(w, r)
default:
requestMethod = "INVALID"
w.WriteHeader(http.StatusMethodNotAllowed)
}
}
func OptionsHandler(w http.ResponseWriter, r *http.Request, isReadOnly bool) {
if isReadOnly {
w.Header().Set("Access-Control-Allow-Methods", "GET, OPTIONS")
} else {
w.Header().Set("Access-Control-Allow-Methods", "PUT, POST, GET, DELETE, OPTIONS")
w.Header().Set("Access-Control-Expose-Headers", "*")
}
w.Header().Set("Access-Control-Allow-Headers", "*")
w.Header().Set("Access-Control-Allow-Credentials", "true")
}
// maybeCheckJwtAuthorization returns true if access should be granted, false if it should be denied
func (fs *FilerServer) maybeCheckJwtAuthorization(r *http.Request, isWrite bool) bool {
var signingKey security.SigningKey
if isWrite {
if len(fs.filerGuard.SigningKey) == 0 {
return true
} else {
signingKey = fs.filerGuard.SigningKey
}
} else {
if len(fs.filerGuard.ReadSigningKey) == 0 {
return true
} else {
signingKey = fs.filerGuard.ReadSigningKey
}
}
tokenStr := security.GetJwt(r)
if tokenStr == "" {
log.V(2).Infof("missing jwt from %s", r.RemoteAddr)
return false
}
token, err := security.DecodeJwt(signingKey, tokenStr, &security.SeaweedFilerClaims{})
if err != nil {
log.V(2).Infof("jwt verification error from %s: %v", r.RemoteAddr, err)
return false
}
if !token.Valid {
log.V(2).Infof("jwt invalid from %s: %v", r.RemoteAddr, tokenStr)
return false
} else {
return true
}
}
func (fs *FilerServer) filerHealthzHandler(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Server", "SeaweedFS "+util.VERSION)
if _, err := fs.filer.Store.FindEntry(context.Background(), filer.TopicsDir); err != nil && err != filer_pb.ErrNotFound {
log.Warningf("filerHealthzHandler FindEntry: %+v", err)
w.WriteHeader(http.StatusServiceUnavailable)
} else {
w.WriteHeader(http.StatusOK)
}
}
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