grpc-js: support unary and server streaming rpcs

This commit adds support for unary and server streaming RPCs.

packages/grpc-js/src/server-call.ts

@@ -16,62 +16,74 @@
  */
 
 import {EventEmitter} from 'events';
+import * as http2 from 'http2';
 import {Duplex, Readable, Writable} from 'stream';
+
 import {ServiceError} from './call';
+import {Status} from './constants';
 import {Deserialize, Serialize} from './make-client';
 import {Metadata} from './metadata';
 
+function noop(): void {}
 
-export class ServerUnaryCall<RequestType> extends EventEmitter {
-  cancelled: boolean;
-  request: RequestType|null;
+export type PartialServiceError = Partial<ServiceError>;
 
-  constructor(private call: ServerCall, public metadata: Metadata) {
-    super();
-    this.cancelled = false;
-    this.request = null;  // TODO(cjihrig): Read the unary request here.
-  }
+type DeadlineUnitIndexSignature = {
+  [name: string]: number
+};
 
-  getPeer(): string {
-    throw new Error('not implemented yet');
-  }
-
-  sendMetadata(responseMetadata: Metadata): void {
-    throw new Error('not implemented yet');
-  }
-}
+const GRPC_ACCEPT_ENCODING_HEADER = 'grpc-accept-encoding';
+const GRPC_ENCODING_HEADER = 'grpc-encoding';
+const GRPC_MESSAGE_HEADER = 'grpc-message';
+const GRPC_STATUS_HEADER = 'grpc-status';
+const GRPC_TIMEOUT_HEADER = 'grpc-timeout';
+const DEADLINE_REGEX = /(\d{1,8})\s*([HMSmun])/;
+const deadlineUnitsToMs: DeadlineUnitIndexSignature = {
+  H: 3600000,
+  M: 60000,
+  S: 1000,
+  m: 1,
+  u: 0.001,
+  n: 0.000001
+};
+const defaultResponseHeaders = {
+  // TODO(cjihrig): Remove these encoding headers from the default response
+  // once compression is integrated.
+  [GRPC_ACCEPT_ENCODING_HEADER]: 'identity',
+  [GRPC_ENCODING_HEADER]: 'identity',
+  [http2.constants.HTTP2_HEADER_STATUS]: http2.constants.HTTP_STATUS_OK,
+  [http2.constants.HTTP2_HEADER_CONTENT_TYPE]: 'application/grpc+proto'
+};
+const defaultResponseOptions = {
+  waitForTrailers: true
+} as http2.ServerStreamResponseOptions;
 
 
-export class ServerReadableStream<RequestType> extends Readable {
-  cancelled: boolean;
+export type ServerSurfaceCall = {
+  cancelled: boolean; getPeer(): string;
+  sendMetadata(responseMetadata: Metadata): void
+};
 
-  constructor(
-      private call: ServerCall, public metadata: Metadata,
-      private deserialize: Deserialize<RequestType>) {
-    super();
-    this.cancelled = false;
-  }
+export type ServerUnaryCall<RequestType, ResponseType> =
+    ServerSurfaceCall&{request: RequestType | null};
+export type ServerReadableStream<RequestType, ResponseType> =
+    ServerSurfaceCall&Readable;
+export type ServerWritableStream<RequestType, ResponseType> =
+    ServerSurfaceCall&Writable&{request: RequestType | null};
+export type ServerDuplexStream<RequestType, ResponseType> =
+    ServerSurfaceCall&Duplex;
 
-  getPeer(): string {
-    throw new Error('not implemented yet');
-  }
-
-  sendMetadata(responseMetadata: Metadata): void {
-    throw new Error('not implemented yet');
-  }
-}
-
-
-export class ServerWritableStream<RequestType, ResponseType> extends Writable {
+export class ServerUnaryCallImpl<RequestType, ResponseType> extends EventEmitter
+    implements ServerUnaryCall<RequestType, ResponseType> {
   cancelled: boolean;
   request: RequestType|null;
 
   constructor(
-      private call: ServerCall, public metadata: Metadata,
-      private serialize: Serialize<ResponseType>) {
+      private call: Http2ServerCallStream<RequestType, ResponseType>,
+      public metadata: Metadata) {
     super();
     this.cancelled = false;
-    this.request = null;  // TODO(cjihrig): Read the unary request here.
+    this.request = null;
   }
 
   getPeer(): string {
@@ -79,18 +91,109 @@ export class ServerWritableStream<RequestType, ResponseType> extends Writable {
   }
 
   sendMetadata(responseMetadata: Metadata): void {
-    throw new Error('not implemented yet');
+    this.call.sendMetadata(responseMetadata);
   }
 }
 
 
-export class ServerDuplexStream<RequestType, ResponseType> extends Duplex {
+export class ServerReadableStreamImpl<RequestType, ResponseType> extends
+    Readable implements ServerReadableStream<RequestType, ResponseType> {
+  cancelled: boolean;
+  private done = false;
+
+  constructor(
+      private call: Http2ServerCallStream<RequestType, ResponseType>,
+      public metadata: Metadata,
+      private _deserialize: Deserialize<RequestType>) {
+    super();
+    this.cancelled = false;
+  }
+
+  getPeer(): string {
+    throw new Error('not implemented yet');
+  }
+
+  sendMetadata(responseMetadata: Metadata): void {
+    this.call.sendMetadata(responseMetadata);
+  }
+
+  _done(): void {
+    this.done = true;
+    this.on('data', noop);
+  }
+}
+
+
+export class ServerWritableStreamImpl<RequestType, ResponseType> extends
+    Writable implements ServerWritableStream<RequestType, ResponseType> {
+  cancelled: boolean;
+  request: RequestType|null;
+
+  constructor(
+      private call: Http2ServerCallStream<RequestType, ResponseType>,
+      public metadata: Metadata, private _serialize: Serialize<ResponseType>) {
+    super({objectMode: true});
+    this.cancelled = false;
+    this.request = null;
+
+    this.on('error', (err) => {
+      this.call.sendError(err as ServiceError);
+      this.end();
+    });
+  }
+
+  getPeer(): string {
+    throw new Error('not implemented yet');
+  }
+
+  sendMetadata(responseMetadata: Metadata): void {
+    this.call.sendMetadata(responseMetadata);
+  }
+
+  async _write(chunk: ResponseType, encoding: string, callback: Function) {
+    try {
+      const response = await this.call.serializeMessage(chunk);
+      this.call.write(response);
+    } catch (err) {
+      err.code = Status.INTERNAL;
+      this.emit('error', err);
+    }
+
+    callback(null);
+  }
+
+  _final(callback: Function): void {
+    this.call.end();
+    callback(null);
+  }
+
+  // tslint:disable-next-line:no-any
+  end(metadata?: any) {
+    if (metadata) {
+      this.call.status.metadata = metadata;
+    }
+
+    super.end();
+  }
+
+  serialize(input: ResponseType): Buffer|null {
+    if (input === null || input === undefined) {
+      return null;
+    }
+
+    return this._serialize(input);
+  }
+}
+
+
+export class ServerDuplexStreamImpl<RequestType, ResponseType> extends Duplex
+    implements ServerDuplexStream<RequestType, ResponseType> {
   cancelled: boolean;
 
   constructor(
-      private call: ServerCall, public metadata: Metadata,
-      private serialize: Serialize<ResponseType>,
-      private deserialize: Deserialize<RequestType>) {
+      private call: Http2ServerCallStream<RequestType, ResponseType>,
+      public metadata: Metadata, private _serialize: Serialize<ResponseType>,
+      private _deserialize: Deserialize<RequestType>) {
     super();
     this.cancelled = false;
   }
@@ -100,15 +203,11 @@ export class ServerDuplexStream<RequestType, ResponseType> extends Duplex {
   }
 
   sendMetadata(responseMetadata: Metadata): void {
-    throw new Error('not implemented yet');
+    this.call.sendMetadata(responseMetadata);
   }
 }
 
 
-// Internal class that wraps the HTTP2 request.
-export class ServerCall {}
-
-
 // Unary response callback signature.
 export type sendUnaryData<ResponseType> =
     (error: ServiceError|null, value: ResponseType|null, trailer?: Metadata,
@@ -116,12 +215,12 @@ export type sendUnaryData<ResponseType> =
 
 // User provided handler for unary calls.
 export type handleUnaryCall<RequestType, ResponseType> =
-    (call: ServerUnaryCall<RequestType>,
+    (call: ServerUnaryCall<RequestType, ResponseType>,
      callback: sendUnaryData<ResponseType>) => void;
 
 // User provided handler for client streaming calls.
 export type handleClientStreamingCall<RequestType, ResponseType> =
-    (call: ServerReadableStream<RequestType>,
+    (call: ServerReadableStream<RequestType, ResponseType>,
      callback: sendUnaryData<ResponseType>) => void;
 
 // User provided handler for server streaming calls.
@@ -133,9 +232,9 @@ export type handleBidiStreamingCall<RequestType, ResponseType> =
     (call: ServerDuplexStream<RequestType, ResponseType>) => void;
 
 export type HandleCall<RequestType, ResponseType> =
-    handleUnaryCall<RequestType, ResponseType>|
-    handleClientStreamingCall<RequestType, ResponseType>|
-    handleServerStreamingCall<RequestType, ResponseType>|
+    handleUnaryCall<RequestType, ResponseType>&
+    handleClientStreamingCall<RequestType, ResponseType>&
+    handleServerStreamingCall<RequestType, ResponseType>&
     handleBidiStreamingCall<RequestType, ResponseType>;
 
 export type Handler<RequestType, ResponseType> = {
@@ -146,3 +245,213 @@ export type Handler<RequestType, ResponseType> = {
 };
 
 export type HandlerType = 'bidi'|'clientStream'|'serverStream'|'unary';
+
+
+// Internal class that wraps the HTTP2 request.
+export class Http2ServerCallStream<RequestType, ResponseType> extends
+    EventEmitter {
+  cancelled = false;
+  deadline: NodeJS.Timer|null = null;
+  status: PartialServiceError = {code: Status.OK, details: 'OK'};
+
+  constructor(
+      private stream: http2.ServerHttp2Stream,
+      private handler: Handler<RequestType, ResponseType>|null) {
+    super();
+
+    this.stream.once('error', (err: Error) => {
+      this.sendError(err as ServiceError, Status.INTERNAL);
+    });
+
+    this.stream.once('close', () => {
+      if (this.stream.rstCode === http2.constants.NGHTTP2_CANCEL) {
+        this.cancelled = true;
+        this.emit('cancelled', 'cancelled');
+      }
+    });
+  }
+
+  private get _metadataSent(): boolean {
+    return this.stream.headersSent;
+  }
+
+  sendMetadata(customMetadata?: Metadata) {
+    if (this._metadataSent) {
+      return;
+    }
+
+    const custom = customMetadata ? customMetadata.toHttp2Headers() : null;
+    // TODO(cjihrig): Include compression headers.
+    const headers = Object.assign(defaultResponseHeaders, custom);
+
+    this.stream.respond(headers, defaultResponseOptions);
+    this.stream.once('wantTrailers', () => {
+      let trailersToSend = {
+        [GRPC_STATUS_HEADER]: this.status.code,
+        [GRPC_MESSAGE_HEADER]: encodeURI(this.status.details as string)
+      };
+      const metadata = this.status.metadata;
+
+      if (metadata) {
+        trailersToSend =
+            Object.assign(trailersToSend, metadata.toHttp2Headers());
+      }
+
+      this.stream.sendTrailers(trailersToSend);
+    });
+  }
+
+  receiveMetadata(headers: http2.IncomingHttpHeaders) {
+    const metadata = Metadata.fromHttp2Headers(headers);
+
+    // TODO(cjihrig): Receive compression metadata.
+
+    const timeoutHeader = metadata.get(GRPC_TIMEOUT_HEADER);
+
+    if (timeoutHeader.length > 0) {
+      const match = timeoutHeader[0].toString().match(DEADLINE_REGEX);
+
+      if (match === null) {
+        this.sendError(
+            new Error('Invalid deadline') as ServiceError, Status.OUT_OF_RANGE);
+        return;
+      }
+
+      const timeout = (+match[1] * deadlineUnitsToMs[match[2]]) | 0;
+
+      this.deadline = setTimeout(handleExpiredDeadline, timeout, this);
+      metadata.remove(GRPC_TIMEOUT_HEADER);
+    }
+
+    return metadata;
+  }
+
+  receiveUnaryMessage(): Promise<RequestType> {
+    return new Promise((resolve, reject) => {
+      const stream = this.stream;
+      const chunks: Buffer[] = [];
+      let totalLength = 0;
+
+      stream.on('data', (data: Buffer) => {
+        chunks.push(data);
+        totalLength += data.byteLength;
+      });
+
+      stream.once('end', async () => {
+        try {
+          const requestBytes = Buffer.concat(chunks, totalLength);
+
+          resolve(await this.deserializeMessage(requestBytes));
+        } catch (err) {
+          this.sendError(err, Status.INTERNAL);
+          resolve();
+        }
+      });
+    });
+  }
+
+  serializeMessage(value: ResponseType) {
+    const handler = this.handler as Handler<RequestType, ResponseType>;
+    const messageBuffer = handler.serialize(value);
+
+    // TODO(cjihrig): Call compression aware serializeMessage().
+    const byteLength = messageBuffer.byteLength;
+    const output = Buffer.allocUnsafe(byteLength + 5);
+    output.writeUInt8(0, 0);
+    output.writeUInt32BE(byteLength, 1);
+    messageBuffer.copy(output, 5);
+    return output;
+  }
+
+  async deserializeMessage(bytes: Buffer) {
+    const handler = this.handler as Handler<RequestType, ResponseType>;
+    // TODO(cjihrig): Call compression aware deserializeMessage().
+    const receivedMessage = bytes.slice(5);
+
+    return handler.deserialize(receivedMessage);
+  }
+
+  async sendUnaryMessage(
+      err: ServiceError|null, value: ResponseType|null, metadata?: Metadata,
+      flags?: number) {
+    if (err) {
+      if (metadata) {
+        err.metadata = metadata;
+      }
+
+      this.sendError(err);
+      return;
+    }
+
+    try {
+      const response = await this.serializeMessage(value as ResponseType);
+
+      if (metadata) {
+        this.status.metadata = metadata;
+      }
+
+      this.end(response);
+    } catch (err) {
+      this.sendError(err, Status.INTERNAL);
+    }
+  }
+
+  sendError(error: ServiceError, code = Status.UNKNOWN) {
+    const {status} = this;
+
+    if (error.hasOwnProperty('message')) {
+      status.details = error.message;
+    } else {
+      status.details = 'Unknown Error';
+    }
+
+    if (error.hasOwnProperty('code') && Number.isInteger(error.code)) {
+      status.code = error.code;
+
+      if (error.hasOwnProperty('details')) {
+        status.details = error.details;
+      }
+    } else {
+      status.code = code;
+    }
+
+    if (error.hasOwnProperty('metadata')) {
+      status.metadata = error.metadata;
+    }
+
+    this.end();
+  }
+
+  write(chunk: Buffer) {
+    if (this.cancelled === true) {
+      return;
+    }
+
+    this.sendMetadata();
+    return this.stream.write(chunk);
+  }
+
+  end(payload?: Buffer) {
+    if (this.cancelled === true) {
+      return;
+    }
+
+    if (this.deadline !== null) {
+      clearTimeout(this.deadline);
+      this.deadline = null;
+    }
+
+    this.sendMetadata();
+    return this.stream.end(payload);
+  }
+}
+
+// tslint:disable:no-any
+type UntypedServerCall = Http2ServerCallStream<any, any>;
+
+function handleExpiredDeadline(call: UntypedServerCall) {
+  call.sendError(
+      new Error('Deadline exceeded') as ServiceError, Status.DEADLINE_EXCEEDED);
+  call.cancelled = true;
+  call.emit('cancelled', 'deadline');
+}

packages/grpc-js/src/server.ts

@@ -22,12 +22,12 @@ import {URL} from 'url';
 import {ServiceError} from './call';
 import {Status} from './constants';
 import {Deserialize, Serialize, ServiceDefinition} from './make-client';
-import {HandleCall, Handler, HandlerType, sendUnaryData, ServerDuplexStream, ServerReadableStream, ServerUnaryCall, ServerWritableStream} from './server-call';
+import {Metadata} from './metadata';
+import {HandleCall, Handler, HandlerType, Http2ServerCallStream, PartialServiceError, sendUnaryData, ServerDuplexStream, ServerDuplexStreamImpl, ServerReadableStream, ServerReadableStreamImpl, ServerUnaryCall, ServerUnaryCallImpl, ServerWritableStream, ServerWritableStreamImpl} from './server-call';
 import {ServerCredentials} from './server-credentials';
 
 function noop(): void {}
 
-type PartialServiceError = Partial<ServiceError>;
 const unimplementedStatusResponse: PartialServiceError = {
   code: Status.UNIMPLEMENTED,
   details: 'The server does not implement this method',
@@ -41,10 +41,11 @@ type UntypedServiceImplementation = {
 };
 
 const defaultHandler = {
-  unary(call: ServerUnaryCall<any>, callback: sendUnaryData<any>): void {
+  unary(call: ServerUnaryCall<any, any>, callback: sendUnaryData<any>): void {
     callback(unimplementedStatusResponse as ServiceError, null);
   },
-  clientStream(call: ServerReadableStream<any>, callback: sendUnaryData<any>):
+  clientStream(
+      call: ServerReadableStream<any, any>, callback: sendUnaryData<any>):
       void {
         callback(unimplementedStatusResponse as ServiceError, null);
       },
@@ -120,8 +121,8 @@ export class Server {
       }
 
       const success = this.register(
-          attrs.path, impl, attrs.responseSerialize, attrs.requestDeserialize,
-          methodType);
+          attrs.path, impl as UntypedHandleCall, attrs.responseSerialize,
+          attrs.requestDeserialize, methodType);
 
       if (success === false) {
         throw new Error(`Method handler for ${attrs.path} already provided.`);
@@ -162,7 +163,7 @@ export class Server {
       this.http2Server = http2.createServer();
     }
 
-    // TODO(cjihrig): Set up the handlers, to allow requests to be processed.
+    this._setupHandlers();
 
     function onError(err: Error): void {
       callback(err, -1);
@@ -227,4 +228,107 @@ export class Server {
   addHttp2Port(): void {
     throw new Error('Not yet implemented');
   }
+
+  private _setupHandlers(): void {
+    if (this.http2Server === null) {
+      return;
+    }
+
+    this.http2Server.on(
+        'stream',
+        (stream: http2.ServerHttp2Stream,
+         headers: http2.IncomingHttpHeaders) => {
+          if (this.started !== true) {
+            stream.end();
+            return;
+          }
+
+          try {
+            const path = headers[http2.constants.HTTP2_HEADER_PATH] as string;
+            const handler = this.handlers.get(path);
+
+            if (handler === undefined) {
+              throw unimplementedStatusResponse;
+            }
+
+            const call = new Http2ServerCallStream(stream, handler);
+            const metadata: Metadata =
+                call.receiveMetadata(headers) as Metadata;
+
+            switch (handler.type) {
+              case 'unary':
+                handleUnary(call, handler, metadata);
+                break;
+              case 'clientStream':
+                handleClientStreaming(call, handler, metadata);
+                break;
+              case 'serverStream':
+                handleServerStreaming(call, handler, metadata);
+                break;
+              case 'bidi':
+                handleBidiStreaming(call, handler, metadata);
+                break;
+              default:
+                throw new Error(`Unknown handler type: ${handler.type}`);
+            }
+          } catch (err) {
+            const call = new Http2ServerCallStream(stream, null);
+            call.sendError(err, Status.INTERNAL);
+          }
+        });
+  }
+}
+
+
+async function handleUnary<RequestType, ResponseType>(
+    call: Http2ServerCallStream<RequestType, ResponseType>,
+    handler: Handler<RequestType, ResponseType>,
+    metadata: Metadata): Promise<void> {
+  const emitter =
+      new ServerUnaryCallImpl<RequestType, ResponseType>(call, metadata);
+  const request = await call.receiveUnaryMessage();
+
+  if (request === undefined || call.cancelled === true) {
+    return;
+  }
+
+  emitter.request = request;
+  handler.func(
+      emitter,
+      (err: ServiceError|null, value: ResponseType|null, trailer?: Metadata,
+       flags?: number) => {
+        call.sendUnaryMessage(err, value, trailer, flags);
+      });
+}
+
+
+function handleClientStreaming<RequestType, ResponseType>(
+    call: Http2ServerCallStream<RequestType, ResponseType>,
+    handler: Handler<RequestType, ResponseType>, metadata: Metadata): void {
+  throw new Error('not implemented yet');
+}
+
+
+async function handleServerStreaming<RequestType, ResponseType>(
+    call: Http2ServerCallStream<RequestType, ResponseType>,
+    handler: Handler<RequestType, ResponseType>,
+    metadata: Metadata): Promise<void> {
+  const request = await call.receiveUnaryMessage();
+
+  if (request === undefined || call.cancelled === true) {
+    return;
+  }
+
+  const stream = new ServerWritableStreamImpl<RequestType, ResponseType>(
+      call, metadata, handler.serialize);
+
+  stream.request = request;
+  handler.func(stream);
+}
+
+
+function handleBidiStreaming<RequestType, ResponseType>(
+    call: Http2ServerCallStream<RequestType, ResponseType>,
+    handler: Handler<RequestType, ResponseType>, metadata: Metadata): void {
+  throw new Error('not implemented yet');
 }

packages/grpc-js/test/fixtures/echo_service.proto

@@ -0,0 +1,33 @@
+/*
+ * Copyright 2019 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+syntax = "proto3";
+
+message EchoMessage {
+  string value = 1;
+  int32 value2 = 2;
+}
+
+service EchoService {
+  rpc Echo (EchoMessage) returns (EchoMessage);
+
+  rpc EchoClientStream (stream EchoMessage) returns (EchoMessage);
+
+  rpc EchoServerStream (EchoMessage) returns (stream EchoMessage);
+
+  rpc EchoBidiStream (stream EchoMessage) returns (stream EchoMessage);
+}

packages/grpc-js/test/fixtures/test_service.proto

@@ -0,0 +1,41 @@
+/*
+ * Copyright 2019 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+syntax = "proto3";
+
+message Request {
+  bool error = 1;
+  string message = 2;
+}
+
+message Response {
+  int32 count = 1;
+}
+
+service TestService {
+  rpc Unary (Request) returns (Response) {
+  }
+
+  rpc ClientStream (stream Request) returns (Response) {
+  }
+
+  rpc ServerStream (Request) returns (stream Response) {
+  }
+
+  rpc BidiStream (stream Request) returns (stream Response) {
+  }
+}

packages/grpc-js/test/test-server-errors.ts

@@ -0,0 +1,522 @@
+/*
+ * Copyright 2019 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+// Allow `any` data type for testing runtime type checking.
+// tslint:disable no-any
+import * as assert from 'assert';
+import {join} from 'path';
+
+import * as grpc from '../src';
+import {ServiceError} from '../src/call';
+import {ServiceClient, ServiceClientConstructor} from '../src/make-client';
+import {Server} from '../src/server';
+import {sendUnaryData, ServerDuplexStream, ServerReadableStream, ServerUnaryCall, ServerWritableStream} from '../src/server-call';
+
+import {loadProtoFile} from './common';
+
+const protoFile = join(__dirname, 'fixtures', 'test_service.proto');
+const testServiceDef = loadProtoFile(protoFile);
+const testServiceClient =
+    testServiceDef.TestService as ServiceClientConstructor;
+const clientInsecureCreds = grpc.credentials.createInsecure();
+const serverInsecureCreds = grpc.ServerCredentials.createInsecure();
+
+
+describe('Client malformed response handling', () => {
+  let server: Server;
+  let client: ServiceClient;
+  const badArg = Buffer.from([0xFF]);
+
+  before((done) => {
+    const malformedTestService = {
+      unary: {
+        path: '/TestService/Unary',
+        requestStream: false,
+        responseStream: false,
+        requestDeserialize: identity,
+        responseSerialize: identity
+      },
+      clientStream: {
+        path: '/TestService/ClientStream',
+        requestStream: true,
+        responseStream: false,
+        requestDeserialize: identity,
+        responseSerialize: identity
+      },
+      serverStream: {
+        path: '/TestService/ServerStream',
+        requestStream: false,
+        responseStream: true,
+        requestDeserialize: identity,
+        responseSerialize: identity
+      },
+      bidiStream: {
+        path: '/TestService/BidiStream',
+        requestStream: true,
+        responseStream: true,
+        requestDeserialize: identity,
+        responseSerialize: identity
+      }
+    } as any;
+
+    server = new Server();
+
+    server.addService(malformedTestService, {
+      unary(call: ServerUnaryCall<any, any>, cb: sendUnaryData<any>) {
+        cb(null, badArg);
+      },
+
+      clientStream(
+          stream: ServerReadableStream<any, any>, cb: sendUnaryData<any>) {
+        stream.on('data', noop);
+        stream.on('end', () => {
+          cb(null, badArg);
+        });
+      },
+
+      serverStream(stream: ServerWritableStream<any, any>) {
+        stream.write(badArg);
+        stream.end();
+      },
+
+      bidiStream(stream: ServerDuplexStream<any, any>) {
+        stream.on('data', () => {
+          // Ignore requests
+          stream.write(badArg);
+        });
+
+        stream.on('end', () => {
+          stream.end();
+        });
+      }
+    });
+
+    server.bindAsync('localhost:0', serverInsecureCreds, (err, port) => {
+      assert.ifError(err);
+      client = new testServiceClient(`localhost:${port}`, clientInsecureCreds);
+      server.start();
+      done();
+    });
+  });
+
+  after((done) => {
+    client.close();
+    server.tryShutdown(done);
+  });
+
+  it('should get an INTERNAL status with a unary call', (done) => {
+    client.unary({}, (err: ServiceError, data: any) => {
+      assert(err);
+      assert.strictEqual(err.code, grpc.status.INTERNAL);
+      done();
+    });
+  });
+
+  it('should get an INTERNAL status with a server stream call', (done) => {
+    const call = client.serverStream({});
+
+    call.on('data', noop);
+    call.on('error', (err: ServiceError) => {
+      assert(err);
+      assert.strictEqual(err.code, grpc.status.INTERNAL);
+      done();
+    });
+  });
+});
+
+describe('Server serialization failure handling', () => {
+  let client: ServiceClient;
+  let server: Server;
+
+  before((done) => {
+    function serializeFail(obj: any) {
+      throw new Error('Serialization failed');
+    }
+
+    const malformedTestService = {
+      unary: {
+        path: '/TestService/Unary',
+        requestStream: false,
+        responseStream: false,
+        requestDeserialize: identity,
+        responseSerialize: serializeFail
+      },
+      clientStream: {
+        path: '/TestService/ClientStream',
+        requestStream: true,
+        responseStream: false,
+        requestDeserialize: identity,
+        responseSerialize: serializeFail
+      },
+      serverStream: {
+        path: '/TestService/ServerStream',
+        requestStream: false,
+        responseStream: true,
+        requestDeserialize: identity,
+        responseSerialize: serializeFail
+      },
+      bidiStream: {
+        path: '/TestService/BidiStream',
+        requestStream: true,
+        responseStream: true,
+        requestDeserialize: identity,
+        responseSerialize: serializeFail
+      }
+    };
+
+    server = new Server();
+    server.addService(malformedTestService as any, {
+      unary(call: ServerUnaryCall<any, any>, cb: sendUnaryData<any>) {
+        cb(null, {});
+      },
+
+      clientStream(
+          stream: ServerReadableStream<any, any>, cb: sendUnaryData<any>) {
+        stream.on('data', noop);
+        stream.on('end', () => {
+          cb(null, {});
+        });
+      },
+
+      serverStream(stream: ServerWritableStream<any, any>) {
+        stream.write({});
+        stream.end();
+      },
+
+      bidiStream(stream: ServerDuplexStream<any, any>) {
+        stream.on('data', () => {
+          // Ignore requests
+          stream.write({});
+        });
+        stream.on('end', () => {
+          stream.end();
+        });
+      }
+    });
+
+    server.bindAsync('localhost:0', serverInsecureCreds, (err, port) => {
+      assert.ifError(err);
+      client = new testServiceClient(`localhost:${port}`, clientInsecureCreds);
+      server.start();
+      done();
+    });
+  });
+
+  after((done) => {
+    client.close();
+    server.tryShutdown(done);
+  });
+
+  it('should get an INTERNAL status with a unary call', (done) => {
+    client.unary({}, (err: ServiceError, data: any) => {
+      assert(err);
+      assert.strictEqual(err.code, grpc.status.INTERNAL);
+      done();
+    });
+  });
+
+  it('should get an INTERNAL status with a server stream call', (done) => {
+    const call = client.serverStream({});
+
+    call.on('data', noop);
+    call.on('error', (err: ServiceError) => {
+      assert(err);
+      assert.strictEqual(err.code, grpc.status.INTERNAL);
+      done();
+    });
+  });
+});
+
+
+describe('Other conditions', () => {
+  let client: ServiceClient;
+  let server: Server;
+  let port: number;
+
+  before((done) => {
+    const trailerMetadata = new grpc.Metadata();
+
+    server = new Server();
+    trailerMetadata.add('trailer-present', 'yes');
+
+    server.addService(testServiceClient.service, {
+      unary(call: ServerUnaryCall<any, any>, cb: sendUnaryData<any>) {
+        const req = call.request;
+
+        if (req.error) {
+          const details = req.message || 'Requested error';
+
+          cb({code: grpc.status.UNKNOWN, details} as ServiceError, null,
+             trailerMetadata);
+        } else {
+          cb(null, {count: 1}, trailerMetadata);
+        }
+      },
+
+      clientStream(
+          stream: ServerReadableStream<any, any>, cb: sendUnaryData<any>) {
+        let count = 0;
+        let errored = false;
+
+        stream.on('data', (data: any) => {
+          if (data.error) {
+            const message = data.message || 'Requested error';
+            errored = true;
+            cb(new Error(message) as ServiceError, null, trailerMetadata);
+          } else {
+            count++;
+          }
+        });
+
+        stream.on('end', () => {
+          if (!errored) {
+            cb(null, {count}, trailerMetadata);
+          }
+        });
+      },
+
+      serverStream(stream: ServerWritableStream<any, any>) {
+        const req = stream.request;
+
+        if (req.error) {
+          stream.emit('error', {
+            code: grpc.status.UNKNOWN,
+            details: req.message || 'Requested error',
+            metadata: trailerMetadata
+          });
+        } else {
+          for (let i = 0; i < 5; i++) {
+            stream.write({count: i});
+          }
+
+          stream.end(trailerMetadata);
+        }
+      },
+
+      bidiStream(stream: ServerDuplexStream<any, any>) {
+        let count = 0;
+        stream.on('data', (data: any) => {
+          if (data.error) {
+            const message = data.message || 'Requested error';
+            const err = new Error(message) as ServiceError;
+
+            err.metadata = trailerMetadata.clone();
+            err.metadata.add('count', '' + count);
+            stream.emit('error', err);
+          } else {
+            stream.write({count});
+            count++;
+          }
+        });
+
+        stream.on('end', () => {
+          stream.end(trailerMetadata);
+        });
+      }
+    });
+
+    server.bindAsync('localhost:0', serverInsecureCreds, (err, _port) => {
+      assert.ifError(err);
+      port = _port;
+      client = new testServiceClient(`localhost:${port}`, clientInsecureCreds);
+      server.start();
+      done();
+    });
+  });
+
+  after((done) => {
+    client.close();
+    server.tryShutdown(done);
+  });
+
+  describe('Server receiving bad input', () => {
+    let misbehavingClient: ServiceClient;
+    const badArg = Buffer.from([0xFF]);
+
+    before(() => {
+      const testServiceAttrs = {
+        unary: {
+          path: '/TestService/Unary',
+          requestStream: false,
+          responseStream: false,
+          requestSerialize: identity,
+          responseDeserialize: identity
+        },
+        clientStream: {
+          path: '/TestService/ClientStream',
+          requestStream: true,
+          responseStream: false,
+          requestSerialize: identity,
+          responseDeserialize: identity
+        },
+        serverStream: {
+          path: '/TestService/ServerStream',
+          requestStream: false,
+          responseStream: true,
+          requestSerialize: identity,
+          responseDeserialize: identity
+        },
+        bidiStream: {
+          path: '/TestService/BidiStream',
+          requestStream: true,
+          responseStream: true,
+          requestSerialize: identity,
+          responseDeserialize: identity
+        }
+      } as any;
+
+      const client =
+          grpc.makeGenericClientConstructor(testServiceAttrs, 'TestService');
+
+      misbehavingClient = new client(`localhost:${port}`, clientInsecureCreds);
+    });
+
+    after(() => {
+      misbehavingClient.close();
+    });
+
+    it('should respond correctly to a unary call', (done) => {
+      misbehavingClient.unary(badArg, (err: ServiceError, data: any) => {
+        assert(err);
+        assert.strictEqual(err.code, grpc.status.INTERNAL);
+        done();
+      });
+    });
+
+    it('should respond correctly to a server stream', (done) => {
+      const call = misbehavingClient.serverStream(badArg);
+
+      call.on('data', (data: any) => {
+        assert.fail(data);
+      });
+
+      call.on('error', (err: ServiceError) => {
+        assert(err);
+        assert.strictEqual(err.code, grpc.status.INTERNAL);
+        done();
+      });
+    });
+  });
+
+  describe('Trailing metadata', () => {
+    it('should be present when a unary call succeeds', (done) => {
+      let count = 0;
+      const call =
+          client.unary({error: false}, (err: ServiceError, data: any) => {
+            assert.ifError(err);
+
+            count++;
+            if (count === 2) {
+              done();
+            }
+          });
+
+      call.on('status', (status: grpc.StatusObject) => {
+        assert.deepStrictEqual(status.metadata.get('trailer-present'), ['yes']);
+
+        count++;
+        if (count === 2) {
+          done();
+        }
+      });
+    });
+
+    it('should be present when a unary call fails', (done) => {
+      let count = 0;
+      const call =
+          client.unary({error: true}, (err: ServiceError, data: any) => {
+            assert(err);
+
+            count++;
+            if (count === 2) {
+              done();
+            }
+          });
+
+      call.on('status', (status: grpc.StatusObject) => {
+        assert.deepStrictEqual(status.metadata.get('trailer-present'), ['yes']);
+
+        count++;
+        if (count === 2) {
+          done();
+        }
+      });
+    });
+
+    it('should be present when a server stream call succeeds', (done) => {
+      const call = client.serverStream({error: false});
+
+      call.on('data', noop);
+      call.on('status', (status: grpc.StatusObject) => {
+        assert.strictEqual(status.code, grpc.status.OK);
+        assert.deepStrictEqual(status.metadata.get('trailer-present'), ['yes']);
+        done();
+      });
+    });
+
+    it('should be present when a server stream call fails', (done) => {
+      const call = client.serverStream({error: true});
+
+      call.on('data', noop);
+      call.on('error', (error: ServiceError) => {
+        assert.deepStrictEqual(error.metadata.get('trailer-present'), ['yes']);
+        done();
+      });
+    });
+  });
+
+  describe('Error object should contain the status', () => {
+    it('for a unary call', (done) => {
+      client.unary({error: true}, (err: ServiceError, data: any) => {
+        assert(err);
+        assert.strictEqual(err.code, grpc.status.UNKNOWN);
+        assert.strictEqual(err.details, 'Requested error');
+        done();
+      });
+    });
+
+    it('for a server stream call', (done) => {
+      const call = client.serverStream({error: true});
+
+      call.on('data', noop);
+      call.on('error', (error: ServiceError) => {
+        assert.strictEqual(error.code, grpc.status.UNKNOWN);
+        assert.strictEqual(error.details, 'Requested error');
+        done();
+      });
+    });
+
+    it('for a UTF-8 error message', (done) => {
+      client.unary(
+          {error: true, message: '測試字符串'},
+          (err: ServiceError, data: any) => {
+            assert(err);
+            assert.strictEqual(err.code, grpc.status.UNKNOWN);
+            assert.strictEqual(err.details, '測試字符串');
+            done();
+          });
+    });
+  });
+});
+
+
+function identity(arg: any): any {
+  return arg;
+}
+
+
+function noop(): void {}

packages/grpc-js/test/test-server.ts

@@ -21,8 +21,12 @@ import * as assert from 'assert';
 import * as fs from 'fs';
 import * as path from 'path';
 
+import * as grpc from '../src';
 import {ServerCredentials} from '../src';
+import {ServiceError} from '../src/call';
+import {ServiceClient, ServiceClientConstructor} from '../src/make-client';
 import {Server} from '../src/server';
+import {sendUnaryData, ServerDuplexStream, ServerReadableStream, ServerUnaryCall, ServerWritableStream} from '../src/server-call';
 
 import {loadProtoFile} from './common';
 
@@ -228,4 +232,158 @@ describe('Server', () => {
       server.bind('localhost:0', ServerCredentials.createInsecure());
     }, /Not implemented. Use bindAsync\(\) instead/);
   });
+
+  describe('Default handlers', () => {
+    let server: Server;
+    let client: ServiceClient;
+
+    const mathProtoFile = path.join(__dirname, 'fixtures', 'math.proto');
+    const mathClient = (loadProtoFile(mathProtoFile).math as any).Math;
+    const mathServiceAttrs = mathClient.service;
+
+    beforeEach((done) => {
+      server = new Server();
+      server.addService(mathServiceAttrs, {});
+      server.bindAsync(
+          'localhost:0', ServerCredentials.createInsecure(), (err, port) => {
+            assert.ifError(err);
+            client = new mathClient(
+                `localhost:${port}`, grpc.credentials.createInsecure());
+            server.start();
+            done();
+          });
+    });
+
+    it('should respond to a unary call with UNIMPLEMENTED', (done) => {
+      client.div(
+          {divisor: 4, dividend: 3}, (error: ServiceError, response: any) => {
+            assert(error);
+            assert.strictEqual(error.code, grpc.status.UNIMPLEMENTED);
+            done();
+          });
+    });
+
+    it('should respond to a server stream with UNIMPLEMENTED', (done) => {
+      const call = client.fib({limit: 5});
+
+      call.on('data', (value: any) => {
+        assert.fail('No messages expected');
+      });
+
+      call.on('error', (err: ServiceError) => {
+        assert(err);
+        assert.strictEqual(err.code, grpc.status.UNIMPLEMENTED);
+        done();
+      });
+    });
+  });
+});
+
+describe('Echo service', () => {
+  let server: Server;
+  let client: ServiceClient;
+
+  before((done) => {
+    const protoFile = path.join(__dirname, 'fixtures', 'echo_service.proto');
+    const echoService =
+        loadProtoFile(protoFile).EchoService as ServiceClientConstructor;
+
+    server = new Server();
+    server.addService(echoService.service, {
+      echo(call: ServerUnaryCall<any, any>, callback: sendUnaryData<any>) {
+        callback(null, call.request);
+      }
+    });
+
+    server.bindAsync(
+        'localhost:0', ServerCredentials.createInsecure(), (err, port) => {
+          assert.ifError(err);
+          client = new echoService(
+              `localhost:${port}`, grpc.credentials.createInsecure());
+          server.start();
+          done();
+        });
+  });
+
+  after((done) => {
+    client.close();
+    server.tryShutdown(done);
+  });
+
+  it('should echo the recieved message directly', (done) => {
+    client.echo(
+        {value: 'test value', value2: 3},
+        (error: ServiceError, response: any) => {
+          assert.ifError(error);
+          assert.deepStrictEqual(response, {value: 'test value', value2: 3});
+          done();
+        });
+  });
+});
+
+describe('Generic client and server', () => {
+  function toString(val: any) {
+    return val.toString();
+  }
+
+  function toBuffer(str: string) {
+    return Buffer.from(str);
+  }
+
+  function capitalize(str: string) {
+    return str.charAt(0).toUpperCase() + str.slice(1);
+  }
+
+  const stringServiceAttrs = {
+    capitalize: {
+      path: '/string/capitalize',
+      requestStream: false,
+      responseStream: false,
+      requestSerialize: toBuffer,
+      requestDeserialize: toString,
+      responseSerialize: toBuffer,
+      responseDeserialize: toString
+    }
+  };
+
+  describe('String client and server', () => {
+    let client: ServiceClient;
+    let server: Server;
+
+    before((done) => {
+      server = new Server();
+
+      server.addService(stringServiceAttrs as any, {
+        capitalize(
+            call: ServerUnaryCall<any, any>, callback: sendUnaryData<any>) {
+          callback(null, capitalize(call.request));
+        }
+      });
+
+      server.bindAsync(
+          'localhost:0', ServerCredentials.createInsecure(), (err, port) => {
+            assert.ifError(err);
+            server.start();
+            const clientConstr = grpc.makeGenericClientConstructor(
+                stringServiceAttrs as any,
+                'unused_but_lets_appease_typescript_anyway');
+            client = new clientConstr(
+                `localhost:${port}`, grpc.credentials.createInsecure());
+            done();
+          });
+    });
+
+    after((done) => {
+      client.close();
+      server.tryShutdown(done);
+    });
+
+    it('Should respond with a capitalized string', (done) => {
+      client.capitalize('abc', (err: ServiceError, response: string) => {
+        assert.ifError(err);
+        assert.strictEqual(response, 'Abc');
+        done();
+      });
+    });
+  });
 });