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plugins.go
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plugins.go
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package grpc
import (
"context"
"net/url"
"strings"
"time"
"google.golang.org/grpc"
"google.golang.org/grpc/credentials"
metadata2 "google.golang.org/grpc/metadata"
"github.com/pydio/cells/v4/common"
"github.com/pydio/cells/v4/common/auth"
"github.com/pydio/cells/v4/common/config"
"github.com/pydio/cells/v4/common/crypto/providers"
"github.com/pydio/cells/v4/common/log"
"github.com/pydio/cells/v4/common/proto/install"
"github.com/pydio/cells/v4/common/proto/tree"
"github.com/pydio/cells/v4/common/runtime"
"github.com/pydio/cells/v4/common/server"
grpc2 "github.com/pydio/cells/v4/common/server/grpc"
"github.com/pydio/cells/v4/common/service"
servicecontext "github.com/pydio/cells/v4/common/service/context"
"github.com/pydio/cells/v4/common/service/context/metadata"
)
func init() {
server.DefaultURLMux().Register("grpc+public", &Opener{})
}
type Opener struct{}
func (o *Opener) OpenURL(ctx context.Context, u *url.URL) (server.Server, error) {
tls := u.Query().Get("secure") == "true"
return createServer(ctx, tls)
}
func init() {
handlersRegister := func(runtimeCtx context.Context, g grpc.ServiceRegistrar, clear bool) {
h := &TreeHandler{runtimeCtx: runtimeCtx}
if clear {
h.name = common.ServiceGatewayGrpcClear
} else {
h.name = common.ServiceGatewayGrpc
}
// Do not use Enhanced here
tree.RegisterNodeProviderServer(g, h)
tree.RegisterNodeReceiverServer(g, h)
tree.RegisterNodeChangesStreamerServer(g, h)
tree.RegisterNodeProviderStreamerServer(g, h)
tree.RegisterNodeReceiverStreamServer(g, h)
}
// Build options - optionally force port
baseOpts := []service.ServiceOption{
service.Tag(common.ServiceTagGateway),
}
tlsOpts := append(baseOpts,
service.Name(common.ServiceGatewayGrpc),
service.Description("External gRPC Access (tls)"),
)
clearOpts := append(baseOpts,
service.Name(common.ServiceGatewayGrpcClear),
service.Description("External gRPC Access (clear)"),
)
runtime.Register("main", func(ctx context.Context) {
ss, _ := config.LoadSites()
var hasClear, hasTls bool
for _, s := range ss {
if s.HasTLS() {
hasTls = true
} else {
hasClear = true
}
}
if hasClear {
clearOpts = append(clearOpts,
service.Context(ctx),
service.WithServerScheme("grpc+public://"),
service.WithGRPC(func(runtimeCtx context.Context, srv grpc.ServiceRegistrar) error {
handlersRegister(runtimeCtx, srv, true)
return nil
}),
)
service.NewService(clearOpts...)
}
if hasTls {
tlsOpts = append(tlsOpts,
service.Context(ctx),
service.WithServerScheme("grpc+public://?secure=true"),
service.WithGRPC(func(runtimeCtx context.Context, srv grpc.ServiceRegistrar) error {
handlersRegister(runtimeCtx, srv, false)
return nil
}),
)
service.NewService(tlsOpts...)
}
})
}
func createServer(ctx context.Context, tls bool) (server.Server, error) {
jwtModifier := createJwtCtxModifier(ctx)
grpcOptions := []grpc.ServerOption{
grpc.ChainUnaryInterceptor(
servicecontext.ContextUnaryServerInterceptor(servicecontext.SpanIncomingContext),
servicecontext.MetricsUnaryServerInterceptor(),
servicecontext.ContextUnaryServerInterceptor(servicecontext.MetaIncomingContext),
servicecontext.ContextUnaryServerInterceptor(jwtModifier),
servicecontext.ContextUnaryServerInterceptor(grpcMetaCtxModifier),
),
grpc.ChainStreamInterceptor(
servicecontext.ContextStreamServerInterceptor(servicecontext.SpanIncomingContext),
servicecontext.MetricsStreamServerInterceptor(),
servicecontext.ContextStreamServerInterceptor(servicecontext.MetaIncomingContext),
servicecontext.ContextStreamServerInterceptor(jwtModifier),
servicecontext.ContextStreamServerInterceptor(grpcMetaCtxModifier),
),
}
if tls {
localConfig := &install.ProxyConfig{
Binds: []string{"0.0.0.0"},
TLSConfig: &install.ProxyConfig_SelfSigned{SelfSigned: &install.TLSSelfSigned{}},
}
tlsConfig, e := providers.LoadTLSServerConfig(localConfig, runtime.CertsStoreURL())
if e != nil {
return nil, e
}
grpcOptions = append(grpcOptions, grpc.Creds(credentials.NewTLS(tlsConfig)))
}
srv := grpc.NewServer(grpcOptions...)
addr := ":0" // Will pick a random port
if !tls {
if port := runtime.GrpcExternalPort(); port != "" {
addr = ":" + port
}
logCtx := servicecontext.WithServiceName(ctx, common.ServiceGatewayGrpcClear)
log.Logger(logCtx).Info("Configuring HTTP only gRPC gateway. Will be accessed directly through " + addr)
} else {
logCtx := servicecontext.WithServiceName(ctx, common.ServiceGatewayGrpc)
log.Logger(logCtx).Info("Configuring self-signed configuration for gRPC gateway to allow full TLS chain.")
}
if tls {
return grpc2.NewWithServer(ctx, "grpcs", srv, addr), nil
}
return grpc2.NewWithServer(ctx, "grpc", srv, addr), nil
}
// jwtCtxModifier extracts x-pydio-bearer metadata to validate authentication
func createJwtCtxModifier(runtimeCtx context.Context) servicecontext.IncomingContextModifier {
return func(ctx context.Context) (context.Context, bool, error) {
ctx = runtime.ForkContext(ctx, runtimeCtx)
jwtVerifier := auth.DefaultJWTVerifier()
meta, ok := metadata2.FromIncomingContext(ctx)
if !ok {
return ctx, false, nil
}
bearer := strings.Join(meta.Get("x-pydio-bearer"), "")
if bearer == "" {
return ctx, false, nil
}
if ct, _, err := jwtVerifier.Verify(ctx, bearer); err != nil {
// append metadata to context before sending audit log
ctx, _, _ = grpcMetaCtxModifier(ctx)
log.Auditer(ctx).Error("Blocked invalid JWT", log.GetAuditId(common.AuditInvalidJwt))
return ctx, false, err
} else {
log.Logger(ctx).Debug("Got valid Claims from Bearer!")
return ct, true, nil
}
}
}
// grpcMetaCtxModifier extracts specific meta from IncomingContext
func grpcMetaCtxModifier(ctx context.Context) (context.Context, bool, error) {
meta := map[string]string{}
if existing, ok := metadata2.FromIncomingContext(ctx); ok {
translate := map[string]string{
"user-agent": servicecontext.HttpMetaUserAgent,
"content-type": servicecontext.HttpMetaContentType,
"x-forwarded-for": servicecontext.HttpMetaRemoteAddress,
"x-pydio-span-id": servicecontext.SpanMetadataId,
}
for k, v := range existing {
if k == ":authority" { // Ignore grpc-specific meta
continue
}
if newK, ok := translate[k]; ok {
meta[newK] = strings.Join(v, "")
} else {
meta[k] = strings.Join(v, "")
}
}
// Override with specific header
if ua, ok := existing["x-pydio-grpc-user-agent"]; ok {
meta[servicecontext.HttpMetaUserAgent] = strings.Join(ua, "")
}
}
meta[servicecontext.HttpMetaExtracted] = servicecontext.HttpMetaExtracted
layout := "2006-01-02T15:04-0700"
t := time.Now()
meta[servicecontext.ServerTime] = t.Format(layout)
// We currently use server time instead of client time. TODO: Retrieve client time and locale and set it here.
meta[servicecontext.ClientTime] = t.Format(layout)
return metadata.NewContext(ctx, meta), true, nil
}