Serge Bazanski | 31dd616 | 2018-10-25 14:20:50 +0200 | [diff] [blame] | 1 | // Go support for Protocol Buffers - Google's data interchange format |
| 2 | // |
| 3 | // Copyright 2015 The Go Authors. All rights reserved. |
| 4 | // https://github.com/golang/protobuf |
| 5 | // |
| 6 | // Redistribution and use in source and binary forms, with or without |
| 7 | // modification, are permitted provided that the following conditions are |
| 8 | // met: |
| 9 | // |
| 10 | // * Redistributions of source code must retain the above copyright |
| 11 | // notice, this list of conditions and the following disclaimer. |
| 12 | // * Redistributions in binary form must reproduce the above |
| 13 | // copyright notice, this list of conditions and the following disclaimer |
| 14 | // in the documentation and/or other materials provided with the |
| 15 | // distribution. |
| 16 | // * Neither the name of Google Inc. nor the names of its |
| 17 | // contributors may be used to endorse or promote products derived from |
| 18 | // this software without specific prior written permission. |
| 19 | // |
| 20 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 21 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 22 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 23 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 24 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 25 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 26 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 27 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 28 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 29 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 30 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 31 | |
| 32 | // Package grpc outputs gRPC service descriptions in Go code. |
| 33 | // It runs as a plugin for the Go protocol buffer compiler plugin. |
| 34 | // It is linked in to protoc-gen-go. |
| 35 | package grpc |
| 36 | |
| 37 | import ( |
| 38 | "fmt" |
| 39 | "path" |
| 40 | "strconv" |
| 41 | "strings" |
| 42 | |
| 43 | pb "github.com/golang/protobuf/protoc-gen-go/descriptor" |
| 44 | "github.com/golang/protobuf/protoc-gen-go/generator" |
| 45 | ) |
| 46 | |
| 47 | // generatedCodeVersion indicates a version of the generated code. |
| 48 | // It is incremented whenever an incompatibility between the generated code and |
| 49 | // the grpc package is introduced; the generated code references |
| 50 | // a constant, grpc.SupportPackageIsVersionN (where N is generatedCodeVersion). |
| 51 | const generatedCodeVersion = 4 |
| 52 | |
| 53 | // Paths for packages used by code generated in this file, |
| 54 | // relative to the import_prefix of the generator.Generator. |
| 55 | const ( |
| 56 | contextPkgPath = "golang.org/x/net/context" |
| 57 | grpcPkgPath = "google.golang.org/grpc" |
| 58 | ) |
| 59 | |
| 60 | func init() { |
| 61 | generator.RegisterPlugin(new(grpc)) |
| 62 | } |
| 63 | |
| 64 | // grpc is an implementation of the Go protocol buffer compiler's |
| 65 | // plugin architecture. It generates bindings for gRPC support. |
| 66 | type grpc struct { |
| 67 | gen *generator.Generator |
| 68 | } |
| 69 | |
| 70 | // Name returns the name of this plugin, "grpc". |
| 71 | func (g *grpc) Name() string { |
| 72 | return "grpc" |
| 73 | } |
| 74 | |
| 75 | // The names for packages imported in the generated code. |
| 76 | // They may vary from the final path component of the import path |
| 77 | // if the name is used by other packages. |
| 78 | var ( |
| 79 | contextPkg string |
| 80 | grpcPkg string |
| 81 | ) |
| 82 | |
| 83 | // Init initializes the plugin. |
| 84 | func (g *grpc) Init(gen *generator.Generator) { |
| 85 | g.gen = gen |
| 86 | contextPkg = generator.RegisterUniquePackageName("context", nil) |
| 87 | grpcPkg = generator.RegisterUniquePackageName("grpc", nil) |
| 88 | } |
| 89 | |
| 90 | // Given a type name defined in a .proto, return its object. |
| 91 | // Also record that we're using it, to guarantee the associated import. |
| 92 | func (g *grpc) objectNamed(name string) generator.Object { |
| 93 | g.gen.RecordTypeUse(name) |
| 94 | return g.gen.ObjectNamed(name) |
| 95 | } |
| 96 | |
| 97 | // Given a type name defined in a .proto, return its name as we will print it. |
| 98 | func (g *grpc) typeName(str string) string { |
| 99 | return g.gen.TypeName(g.objectNamed(str)) |
| 100 | } |
| 101 | |
| 102 | // P forwards to g.gen.P. |
| 103 | func (g *grpc) P(args ...interface{}) { g.gen.P(args...) } |
| 104 | |
| 105 | // Generate generates code for the services in the given file. |
| 106 | func (g *grpc) Generate(file *generator.FileDescriptor) { |
| 107 | if len(file.FileDescriptorProto.Service) == 0 { |
| 108 | return |
| 109 | } |
| 110 | |
| 111 | g.P("// Reference imports to suppress errors if they are not otherwise used.") |
| 112 | g.P("var _ ", contextPkg, ".Context") |
| 113 | g.P("var _ ", grpcPkg, ".ClientConn") |
| 114 | g.P() |
| 115 | |
| 116 | // Assert version compatibility. |
| 117 | g.P("// This is a compile-time assertion to ensure that this generated file") |
| 118 | g.P("// is compatible with the grpc package it is being compiled against.") |
| 119 | g.P("const _ = ", grpcPkg, ".SupportPackageIsVersion", generatedCodeVersion) |
| 120 | g.P() |
| 121 | |
| 122 | for i, service := range file.FileDescriptorProto.Service { |
| 123 | g.generateService(file, service, i) |
| 124 | } |
| 125 | } |
| 126 | |
| 127 | // GenerateImports generates the import declaration for this file. |
| 128 | func (g *grpc) GenerateImports(file *generator.FileDescriptor) { |
| 129 | if len(file.FileDescriptorProto.Service) == 0 { |
| 130 | return |
| 131 | } |
| 132 | g.P("import (") |
| 133 | g.P(contextPkg, " ", generator.GoImportPath(path.Join(string(g.gen.ImportPrefix), contextPkgPath))) |
| 134 | g.P(grpcPkg, " ", generator.GoImportPath(path.Join(string(g.gen.ImportPrefix), grpcPkgPath))) |
| 135 | g.P(")") |
| 136 | g.P() |
| 137 | } |
| 138 | |
| 139 | // reservedClientName records whether a client name is reserved on the client side. |
| 140 | var reservedClientName = map[string]bool{ |
| 141 | // TODO: do we need any in gRPC? |
| 142 | } |
| 143 | |
| 144 | func unexport(s string) string { return strings.ToLower(s[:1]) + s[1:] } |
| 145 | |
| 146 | // deprecationComment is the standard comment added to deprecated |
| 147 | // messages, fields, enums, and enum values. |
| 148 | var deprecationComment = "// Deprecated: Do not use." |
| 149 | |
| 150 | // generateService generates all the code for the named service. |
| 151 | func (g *grpc) generateService(file *generator.FileDescriptor, service *pb.ServiceDescriptorProto, index int) { |
| 152 | path := fmt.Sprintf("6,%d", index) // 6 means service. |
| 153 | |
| 154 | origServName := service.GetName() |
| 155 | fullServName := origServName |
| 156 | if pkg := file.GetPackage(); pkg != "" { |
| 157 | fullServName = pkg + "." + fullServName |
| 158 | } |
| 159 | servName := generator.CamelCase(origServName) |
| 160 | deprecated := service.GetOptions().GetDeprecated() |
| 161 | |
| 162 | g.P() |
| 163 | g.P(fmt.Sprintf(`// %sClient is the client API for %s service. |
| 164 | // |
| 165 | // For semantics around ctx use and closing/ending streaming RPCs, please refer to https://godoc.org/google.golang.org/grpc#ClientConn.NewStream.`, servName, servName)) |
| 166 | |
| 167 | // Client interface. |
| 168 | if deprecated { |
| 169 | g.P("//") |
| 170 | g.P(deprecationComment) |
| 171 | } |
| 172 | g.P("type ", servName, "Client interface {") |
| 173 | for i, method := range service.Method { |
| 174 | g.gen.PrintComments(fmt.Sprintf("%s,2,%d", path, i)) // 2 means method in a service. |
| 175 | g.P(g.generateClientSignature(servName, method)) |
| 176 | } |
| 177 | g.P("}") |
| 178 | g.P() |
| 179 | |
| 180 | // Client structure. |
| 181 | g.P("type ", unexport(servName), "Client struct {") |
| 182 | g.P("cc *", grpcPkg, ".ClientConn") |
| 183 | g.P("}") |
| 184 | g.P() |
| 185 | |
| 186 | // NewClient factory. |
| 187 | if deprecated { |
| 188 | g.P(deprecationComment) |
| 189 | } |
| 190 | g.P("func New", servName, "Client (cc *", grpcPkg, ".ClientConn) ", servName, "Client {") |
| 191 | g.P("return &", unexport(servName), "Client{cc}") |
| 192 | g.P("}") |
| 193 | g.P() |
| 194 | |
| 195 | var methodIndex, streamIndex int |
| 196 | serviceDescVar := "_" + servName + "_serviceDesc" |
| 197 | // Client method implementations. |
| 198 | for _, method := range service.Method { |
| 199 | var descExpr string |
| 200 | if !method.GetServerStreaming() && !method.GetClientStreaming() { |
| 201 | // Unary RPC method |
| 202 | descExpr = fmt.Sprintf("&%s.Methods[%d]", serviceDescVar, methodIndex) |
| 203 | methodIndex++ |
| 204 | } else { |
| 205 | // Streaming RPC method |
| 206 | descExpr = fmt.Sprintf("&%s.Streams[%d]", serviceDescVar, streamIndex) |
| 207 | streamIndex++ |
| 208 | } |
| 209 | g.generateClientMethod(servName, fullServName, serviceDescVar, method, descExpr) |
| 210 | } |
| 211 | |
| 212 | // Server interface. |
| 213 | serverType := servName + "Server" |
| 214 | g.P("// ", serverType, " is the server API for ", servName, " service.") |
| 215 | if deprecated { |
| 216 | g.P("//") |
| 217 | g.P(deprecationComment) |
| 218 | } |
| 219 | g.P("type ", serverType, " interface {") |
| 220 | for i, method := range service.Method { |
| 221 | g.gen.PrintComments(fmt.Sprintf("%s,2,%d", path, i)) // 2 means method in a service. |
| 222 | g.P(g.generateServerSignature(servName, method)) |
| 223 | } |
| 224 | g.P("}") |
| 225 | g.P() |
| 226 | |
| 227 | // Server registration. |
| 228 | if deprecated { |
| 229 | g.P(deprecationComment) |
| 230 | } |
| 231 | g.P("func Register", servName, "Server(s *", grpcPkg, ".Server, srv ", serverType, ") {") |
| 232 | g.P("s.RegisterService(&", serviceDescVar, `, srv)`) |
| 233 | g.P("}") |
| 234 | g.P() |
| 235 | |
| 236 | // Server handler implementations. |
| 237 | var handlerNames []string |
| 238 | for _, method := range service.Method { |
| 239 | hname := g.generateServerMethod(servName, fullServName, method) |
| 240 | handlerNames = append(handlerNames, hname) |
| 241 | } |
| 242 | |
| 243 | // Service descriptor. |
| 244 | g.P("var ", serviceDescVar, " = ", grpcPkg, ".ServiceDesc {") |
| 245 | g.P("ServiceName: ", strconv.Quote(fullServName), ",") |
| 246 | g.P("HandlerType: (*", serverType, ")(nil),") |
| 247 | g.P("Methods: []", grpcPkg, ".MethodDesc{") |
| 248 | for i, method := range service.Method { |
| 249 | if method.GetServerStreaming() || method.GetClientStreaming() { |
| 250 | continue |
| 251 | } |
| 252 | g.P("{") |
| 253 | g.P("MethodName: ", strconv.Quote(method.GetName()), ",") |
| 254 | g.P("Handler: ", handlerNames[i], ",") |
| 255 | g.P("},") |
| 256 | } |
| 257 | g.P("},") |
| 258 | g.P("Streams: []", grpcPkg, ".StreamDesc{") |
| 259 | for i, method := range service.Method { |
| 260 | if !method.GetServerStreaming() && !method.GetClientStreaming() { |
| 261 | continue |
| 262 | } |
| 263 | g.P("{") |
| 264 | g.P("StreamName: ", strconv.Quote(method.GetName()), ",") |
| 265 | g.P("Handler: ", handlerNames[i], ",") |
| 266 | if method.GetServerStreaming() { |
| 267 | g.P("ServerStreams: true,") |
| 268 | } |
| 269 | if method.GetClientStreaming() { |
| 270 | g.P("ClientStreams: true,") |
| 271 | } |
| 272 | g.P("},") |
| 273 | } |
| 274 | g.P("},") |
| 275 | g.P("Metadata: \"", file.GetName(), "\",") |
| 276 | g.P("}") |
| 277 | g.P() |
| 278 | } |
| 279 | |
| 280 | // generateClientSignature returns the client-side signature for a method. |
| 281 | func (g *grpc) generateClientSignature(servName string, method *pb.MethodDescriptorProto) string { |
| 282 | origMethName := method.GetName() |
| 283 | methName := generator.CamelCase(origMethName) |
| 284 | if reservedClientName[methName] { |
| 285 | methName += "_" |
| 286 | } |
| 287 | reqArg := ", in *" + g.typeName(method.GetInputType()) |
| 288 | if method.GetClientStreaming() { |
| 289 | reqArg = "" |
| 290 | } |
| 291 | respName := "*" + g.typeName(method.GetOutputType()) |
| 292 | if method.GetServerStreaming() || method.GetClientStreaming() { |
| 293 | respName = servName + "_" + generator.CamelCase(origMethName) + "Client" |
| 294 | } |
| 295 | return fmt.Sprintf("%s(ctx %s.Context%s, opts ...%s.CallOption) (%s, error)", methName, contextPkg, reqArg, grpcPkg, respName) |
| 296 | } |
| 297 | |
| 298 | func (g *grpc) generateClientMethod(servName, fullServName, serviceDescVar string, method *pb.MethodDescriptorProto, descExpr string) { |
| 299 | sname := fmt.Sprintf("/%s/%s", fullServName, method.GetName()) |
| 300 | methName := generator.CamelCase(method.GetName()) |
| 301 | inType := g.typeName(method.GetInputType()) |
| 302 | outType := g.typeName(method.GetOutputType()) |
| 303 | |
| 304 | if method.GetOptions().GetDeprecated() { |
| 305 | g.P(deprecationComment) |
| 306 | } |
| 307 | g.P("func (c *", unexport(servName), "Client) ", g.generateClientSignature(servName, method), "{") |
| 308 | if !method.GetServerStreaming() && !method.GetClientStreaming() { |
| 309 | g.P("out := new(", outType, ")") |
| 310 | // TODO: Pass descExpr to Invoke. |
| 311 | g.P(`err := c.cc.Invoke(ctx, "`, sname, `", in, out, opts...)`) |
| 312 | g.P("if err != nil { return nil, err }") |
| 313 | g.P("return out, nil") |
| 314 | g.P("}") |
| 315 | g.P() |
| 316 | return |
| 317 | } |
| 318 | streamType := unexport(servName) + methName + "Client" |
| 319 | g.P("stream, err := c.cc.NewStream(ctx, ", descExpr, `, "`, sname, `", opts...)`) |
| 320 | g.P("if err != nil { return nil, err }") |
| 321 | g.P("x := &", streamType, "{stream}") |
| 322 | if !method.GetClientStreaming() { |
| 323 | g.P("if err := x.ClientStream.SendMsg(in); err != nil { return nil, err }") |
| 324 | g.P("if err := x.ClientStream.CloseSend(); err != nil { return nil, err }") |
| 325 | } |
| 326 | g.P("return x, nil") |
| 327 | g.P("}") |
| 328 | g.P() |
| 329 | |
| 330 | genSend := method.GetClientStreaming() |
| 331 | genRecv := method.GetServerStreaming() |
| 332 | genCloseAndRecv := !method.GetServerStreaming() |
| 333 | |
| 334 | // Stream auxiliary types and methods. |
| 335 | g.P("type ", servName, "_", methName, "Client interface {") |
| 336 | if genSend { |
| 337 | g.P("Send(*", inType, ") error") |
| 338 | } |
| 339 | if genRecv { |
| 340 | g.P("Recv() (*", outType, ", error)") |
| 341 | } |
| 342 | if genCloseAndRecv { |
| 343 | g.P("CloseAndRecv() (*", outType, ", error)") |
| 344 | } |
| 345 | g.P(grpcPkg, ".ClientStream") |
| 346 | g.P("}") |
| 347 | g.P() |
| 348 | |
| 349 | g.P("type ", streamType, " struct {") |
| 350 | g.P(grpcPkg, ".ClientStream") |
| 351 | g.P("}") |
| 352 | g.P() |
| 353 | |
| 354 | if genSend { |
| 355 | g.P("func (x *", streamType, ") Send(m *", inType, ") error {") |
| 356 | g.P("return x.ClientStream.SendMsg(m)") |
| 357 | g.P("}") |
| 358 | g.P() |
| 359 | } |
| 360 | if genRecv { |
| 361 | g.P("func (x *", streamType, ") Recv() (*", outType, ", error) {") |
| 362 | g.P("m := new(", outType, ")") |
| 363 | g.P("if err := x.ClientStream.RecvMsg(m); err != nil { return nil, err }") |
| 364 | g.P("return m, nil") |
| 365 | g.P("}") |
| 366 | g.P() |
| 367 | } |
| 368 | if genCloseAndRecv { |
| 369 | g.P("func (x *", streamType, ") CloseAndRecv() (*", outType, ", error) {") |
| 370 | g.P("if err := x.ClientStream.CloseSend(); err != nil { return nil, err }") |
| 371 | g.P("m := new(", outType, ")") |
| 372 | g.P("if err := x.ClientStream.RecvMsg(m); err != nil { return nil, err }") |
| 373 | g.P("return m, nil") |
| 374 | g.P("}") |
| 375 | g.P() |
| 376 | } |
| 377 | } |
| 378 | |
| 379 | // generateServerSignature returns the server-side signature for a method. |
| 380 | func (g *grpc) generateServerSignature(servName string, method *pb.MethodDescriptorProto) string { |
| 381 | origMethName := method.GetName() |
| 382 | methName := generator.CamelCase(origMethName) |
| 383 | if reservedClientName[methName] { |
| 384 | methName += "_" |
| 385 | } |
| 386 | |
| 387 | var reqArgs []string |
| 388 | ret := "error" |
| 389 | if !method.GetServerStreaming() && !method.GetClientStreaming() { |
| 390 | reqArgs = append(reqArgs, contextPkg+".Context") |
| 391 | ret = "(*" + g.typeName(method.GetOutputType()) + ", error)" |
| 392 | } |
| 393 | if !method.GetClientStreaming() { |
| 394 | reqArgs = append(reqArgs, "*"+g.typeName(method.GetInputType())) |
| 395 | } |
| 396 | if method.GetServerStreaming() || method.GetClientStreaming() { |
| 397 | reqArgs = append(reqArgs, servName+"_"+generator.CamelCase(origMethName)+"Server") |
| 398 | } |
| 399 | |
| 400 | return methName + "(" + strings.Join(reqArgs, ", ") + ") " + ret |
| 401 | } |
| 402 | |
| 403 | func (g *grpc) generateServerMethod(servName, fullServName string, method *pb.MethodDescriptorProto) string { |
| 404 | methName := generator.CamelCase(method.GetName()) |
| 405 | hname := fmt.Sprintf("_%s_%s_Handler", servName, methName) |
| 406 | inType := g.typeName(method.GetInputType()) |
| 407 | outType := g.typeName(method.GetOutputType()) |
| 408 | |
| 409 | if !method.GetServerStreaming() && !method.GetClientStreaming() { |
| 410 | g.P("func ", hname, "(srv interface{}, ctx ", contextPkg, ".Context, dec func(interface{}) error, interceptor ", grpcPkg, ".UnaryServerInterceptor) (interface{}, error) {") |
| 411 | g.P("in := new(", inType, ")") |
| 412 | g.P("if err := dec(in); err != nil { return nil, err }") |
| 413 | g.P("if interceptor == nil { return srv.(", servName, "Server).", methName, "(ctx, in) }") |
| 414 | g.P("info := &", grpcPkg, ".UnaryServerInfo{") |
| 415 | g.P("Server: srv,") |
| 416 | g.P("FullMethod: ", strconv.Quote(fmt.Sprintf("/%s/%s", fullServName, methName)), ",") |
| 417 | g.P("}") |
| 418 | g.P("handler := func(ctx ", contextPkg, ".Context, req interface{}) (interface{}, error) {") |
| 419 | g.P("return srv.(", servName, "Server).", methName, "(ctx, req.(*", inType, "))") |
| 420 | g.P("}") |
| 421 | g.P("return interceptor(ctx, in, info, handler)") |
| 422 | g.P("}") |
| 423 | g.P() |
| 424 | return hname |
| 425 | } |
| 426 | streamType := unexport(servName) + methName + "Server" |
| 427 | g.P("func ", hname, "(srv interface{}, stream ", grpcPkg, ".ServerStream) error {") |
| 428 | if !method.GetClientStreaming() { |
| 429 | g.P("m := new(", inType, ")") |
| 430 | g.P("if err := stream.RecvMsg(m); err != nil { return err }") |
| 431 | g.P("return srv.(", servName, "Server).", methName, "(m, &", streamType, "{stream})") |
| 432 | } else { |
| 433 | g.P("return srv.(", servName, "Server).", methName, "(&", streamType, "{stream})") |
| 434 | } |
| 435 | g.P("}") |
| 436 | g.P() |
| 437 | |
| 438 | genSend := method.GetServerStreaming() |
| 439 | genSendAndClose := !method.GetServerStreaming() |
| 440 | genRecv := method.GetClientStreaming() |
| 441 | |
| 442 | // Stream auxiliary types and methods. |
| 443 | g.P("type ", servName, "_", methName, "Server interface {") |
| 444 | if genSend { |
| 445 | g.P("Send(*", outType, ") error") |
| 446 | } |
| 447 | if genSendAndClose { |
| 448 | g.P("SendAndClose(*", outType, ") error") |
| 449 | } |
| 450 | if genRecv { |
| 451 | g.P("Recv() (*", inType, ", error)") |
| 452 | } |
| 453 | g.P(grpcPkg, ".ServerStream") |
| 454 | g.P("}") |
| 455 | g.P() |
| 456 | |
| 457 | g.P("type ", streamType, " struct {") |
| 458 | g.P(grpcPkg, ".ServerStream") |
| 459 | g.P("}") |
| 460 | g.P() |
| 461 | |
| 462 | if genSend { |
| 463 | g.P("func (x *", streamType, ") Send(m *", outType, ") error {") |
| 464 | g.P("return x.ServerStream.SendMsg(m)") |
| 465 | g.P("}") |
| 466 | g.P() |
| 467 | } |
| 468 | if genSendAndClose { |
| 469 | g.P("func (x *", streamType, ") SendAndClose(m *", outType, ") error {") |
| 470 | g.P("return x.ServerStream.SendMsg(m)") |
| 471 | g.P("}") |
| 472 | g.P() |
| 473 | } |
| 474 | if genRecv { |
| 475 | g.P("func (x *", streamType, ") Recv() (*", inType, ", error) {") |
| 476 | g.P("m := new(", inType, ")") |
| 477 | g.P("if err := x.ServerStream.RecvMsg(m); err != nil { return nil, err }") |
| 478 | g.P("return m, nil") |
| 479 | g.P("}") |
| 480 | g.P() |
| 481 | } |
| 482 | |
| 483 | return hname |
| 484 | } |