add gateway for easier POST and DELETE blobs

weed/server/gateway_server.go

@@ -0,0 +1,106 @@
+package weed_server
+
+import (
+	"github.com/chrislusf/seaweedfs/weed/operation"
+	"google.golang.org/grpc"
+	"math/rand"
+	"net/http"
+
+	"github.com/chrislusf/seaweedfs/weed/util"
+
+	_ "github.com/chrislusf/seaweedfs/weed/filer/cassandra"
+	_ "github.com/chrislusf/seaweedfs/weed/filer/elastic/v7"
+	_ "github.com/chrislusf/seaweedfs/weed/filer/etcd"
+	_ "github.com/chrislusf/seaweedfs/weed/filer/hbase"
+	_ "github.com/chrislusf/seaweedfs/weed/filer/leveldb"
+	_ "github.com/chrislusf/seaweedfs/weed/filer/leveldb2"
+	_ "github.com/chrislusf/seaweedfs/weed/filer/leveldb3"
+	_ "github.com/chrislusf/seaweedfs/weed/filer/mongodb"
+	_ "github.com/chrislusf/seaweedfs/weed/filer/mysql"
+	_ "github.com/chrislusf/seaweedfs/weed/filer/mysql2"
+	_ "github.com/chrislusf/seaweedfs/weed/filer/postgres"
+	_ "github.com/chrislusf/seaweedfs/weed/filer/postgres2"
+	_ "github.com/chrislusf/seaweedfs/weed/filer/redis"
+	_ "github.com/chrislusf/seaweedfs/weed/filer/redis2"
+	"github.com/chrislusf/seaweedfs/weed/glog"
+	_ "github.com/chrislusf/seaweedfs/weed/notification/aws_sqs"
+	_ "github.com/chrislusf/seaweedfs/weed/notification/gocdk_pub_sub"
+	_ "github.com/chrislusf/seaweedfs/weed/notification/google_pub_sub"
+	_ "github.com/chrislusf/seaweedfs/weed/notification/kafka"
+	_ "github.com/chrislusf/seaweedfs/weed/notification/log"
+	"github.com/chrislusf/seaweedfs/weed/security"
+)
+
+type GatewayOption struct {
+	Masters  []string
+	Filers   []string
+	MaxMB    int
+	IsSecure bool
+}
+
+type GatewayServer struct {
+	option         *GatewayOption
+	secret         security.SigningKey
+	grpcDialOption grpc.DialOption
+}
+
+func NewGatewayServer(defaultMux *http.ServeMux, option *GatewayOption) (fs *GatewayServer, err error) {
+
+	fs = &GatewayServer{
+		option:         option,
+		grpcDialOption: security.LoadClientTLS(util.GetViper(), "grpc.client"),
+	}
+
+	if len(option.Masters) == 0 {
+		glog.Fatal("master list is required!")
+	}
+
+	defaultMux.HandleFunc("/blobs/", fs.blobsHandler)
+	defaultMux.HandleFunc("/files/", fs.filesHandler)
+	defaultMux.HandleFunc("/topics/", fs.topicsHandler)
+
+	return fs, nil
+}
+
+func (fs *GatewayServer) getMaster() string {
+	randMaster := rand.Intn(len(fs.option.Masters))
+	return fs.option.Masters[randMaster]
+}
+
+func (fs *GatewayServer) blobsHandler(w http.ResponseWriter, r *http.Request) {
+	switch r.Method {
+	case "DELETE":
+		chunkId := r.URL.Path[len("/blobs/"):]
+		fullUrl, err := operation.LookupFileId(fs.getMaster, chunkId)
+		if err != nil {
+			writeJsonError(w, r, http.StatusNotFound, err)
+			return
+		}
+		var jwtAuthorization security.EncodedJwt
+		if fs.option.IsSecure {
+			jwtAuthorization = operation.LookupJwt(fs.getMaster(), chunkId)
+		}
+		body, statusCode, err := util.DeleteProxied(fullUrl, string(jwtAuthorization))
+		if err != nil {
+			writeJsonError(w, r, http.StatusNotFound, err)
+			return
+		}
+		w.WriteHeader(statusCode)
+		w.Write(body)
+	case "POST":
+		submitForClientHandler(w, r, fs.getMaster, fs.grpcDialOption)
+	}
+}
+
+func (fs *GatewayServer) filesHandler(w http.ResponseWriter, r *http.Request) {
+	switch r.Method {
+	case "DELETE":
+	case "POST":
+	}
+}
+
+func (fs *GatewayServer) topicsHandler(w http.ResponseWriter, r *http.Request) {
+	switch r.Method {
+	case "POST":
+	}
+}