Added multiple proxies interoperability

Makefile

@@ -93,6 +93,9 @@ plugin:
 example: plugin
 	cd "$(ROOT_DIR)"/net/grpc/gateway/examples/echo && make
 
+standalone-proxy: package
+	cd "$(ROOT_DIR)"/net/grpc/gateway/examples/echo && make standalone-proxy
+
 echo_server:
 	cd "$(ROOT_DIR)"/net/grpc/gateway/examples/echo && make echo_server
 

README.md

@@ -28,13 +28,13 @@ Try gRPC-Web and run a quick Echo example from the browser!
 From the repo root directory:
 
 ```sh
-$ docker-compose up
+$ docker-compose up echo-server envoy commonjs-client-example
 ```
 
 Open a browser tab, and inspect
 
 ```
-http://localhost/net/grpc/gateway/examples/echo/echotest.html
+http://localhost:8081/echo_commonjs_test.html
 ```
 
 ## How it works
@@ -99,3 +99,24 @@ stream.on('data', function(response) {
   console.log(response.getMessage());
 });
 ```
+
+## Proxy interoperability
+
+Multiple proxies supports the gRPC-Web protocol. Currently, the default proxy
+is [Envoy](https://www.envoyproxy.io).
+
+```
+$ docker-compose up echo-server envoy commonjs-client-example
+```
+
+An alternative is to build Nginx that comes with this repository.
+
+```
+$ docker-compose up echo-server nginx commonjs-client-example
+```
+
+Finally, you can also try this [gRPC-Web Go Proxy](https://github.com/improbable-eng/grpc-web/tree/master/go/grpcwebproxy).
+
+```
+$ docker-compose up echo-server grpcwebproxy binary-client-example
+```

docker-compose.yml

@@ -23,6 +23,24 @@ services:
       - "8080:8080"
     links:
       - echo-server
+  grpcwebproxy:
+    build:
+      context: ./
+      dockerfile: ./net/grpc/gateway/docker/grpcwebproxy/Dockerfile
+    image: grpc-web:grpcwebproxy
+    ports:
+      - "8080:8080"
+    links:
+      - echo-server
+  nginx:
+    build:
+      context: ./
+      dockerfile: ./net/grpc/gateway/docker/nginx/Dockerfile
+    image: grpc-web:nginx
+    ports:
+      - "8080:8080"
+    links:
+      - echo-server
   static-assets:
     build:
       context: ./
@@ -41,3 +59,12 @@ services:
     image: grpc-web:commonjs-client-example
     ports:
       - "8081:8081"
+  binary-client-example:
+    build:
+      context: ./
+      dockerfile: ./net/grpc/gateway/docker/binary_client_example/Dockerfile
+    depends_on:
+      - prereqs
+    image: grpc-web:binary-client-example
+    ports:
+      - "8081:8081"

etc/localhost.crt

@@ -0,0 +1,18 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----

etc/localhost.key

@@ -0,0 +1,27 @@
+-----BEGIN RSA PRIVATE KEY-----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+-----END RSA PRIVATE KEY-----

javascript/net/grpc/web/grpc_generator.cc

@@ -165,7 +165,7 @@ void PrintFileHeader(Printer* printer, const std::map<string, string>& vars) {
 }
 
 void PrintServiceConstructor(Printer* printer,
-                             const std::map<string, string>& vars) {
+                             std::map<string, string>& vars) {
   printer->Print(
       vars,
       "/**\n"
@@ -181,6 +181,14 @@ void PrintServiceConstructor(Printer* printer,
       "  /**\n"
       "   * @private @const {!grpc.web.$mode$ClientBase} The client\n"
       "   */\n"
+      "   if (!options) options = {};\n");
+  if (vars["mode"] == GetModeVar(Mode::GRPCWEB)) {
+    printer->Print(
+        vars,
+        "  options['format'] = '$format$';\n\n");
+  }
+  printer->Print(
+      vars,
       "  this.client_ = new grpc.web.$mode$ClientBase(options);\n\n"
       "  /**\n"
       "   * @private @const {string} The hostname\n"
@@ -357,8 +365,9 @@ class GrpcCodeGenerator : public CodeGenerator {
       vars["mode"] = GetModeVar(Mode::OP);
     } else if (mode == "base64") {
       vars["mode"] = GetModeVar(Mode::GATEWAY);
-    } else if (mode == "grpcweb") {
+    } else if (mode == "grpcweb" || mode == "grpcwebtext") {
       vars["mode"] = GetModeVar(Mode::GRPCWEB);
+      vars["format"] = (mode == "grpcweb") ? "binary" : "text";
     } else if (mode == "jspb") {
       vars["mode"] = GetModeVar(Mode::OPJSPB);
     } else if (mode == "frameworks") {

javascript/net/grpc/web/grpcwebclientbase.js

@@ -43,6 +43,13 @@ const googCrypt = goog.require('goog.crypt.base64');
  * @implements {AbstractClientBase}
  */
 const GrpcWebClientBase = function(opt_options) {
+  /**
+   * @const
+   * @private {string}
+   */
+  this.format_ =
+    goog.getObjectByName('format', opt_options) || "text";
+
   /**
    * @const
    * @private {boolean}
@@ -58,8 +65,6 @@ const GrpcWebClientBase = function(opt_options) {
 GrpcWebClientBase.prototype.rpcCall = function(
     method, request, metadata, methodInfo, callback) {
   var xhr = this.newXhr_();
-  var serialized = methodInfo.requestSerializeFn(request);
-  xhr.headers.addAll(metadata);
 
   var genericTransportInterface = {
     xhr: xhr,
@@ -89,18 +94,28 @@ GrpcWebClientBase.prototype.rpcCall = function(
     }
   });
 
-  xhr.headers.set('Content-Type', 'application/grpc-web-text');
+  xhr.headers.addAll(metadata);
+  if (this.format_ == "text") {
+    xhr.headers.set('Content-Type', 'application/grpc-web-text');
+    xhr.headers.set('Accept', 'application/grpc-web-text');
+  } else {
+    xhr.headers.set('Content-Type', 'application/grpc-web+proto');
+  }
   xhr.headers.set('X-User-Agent', 'grpc-web-javascript/0.1');
-  xhr.headers.set('Accept', 'application/grpc-web-text');
-
-  var payload = this.encodeRequest_(serialized);
-  payload = googCrypt.encodeByteArray(payload);
-
+  xhr.headers.set('X-Grpc-Web', '1');
   if (this.suppressCorsPreflight_) {
     var headerObject = xhr.headers.toObject();
     xhr.headers.clear();
     method = GrpcWebClientBase.setCorsOverride_(method, headerObject);
   }
+
+  var serialized = methodInfo.requestSerializeFn(request);
+  var payload = this.encodeRequest_(serialized);
+  if (this.format_ == "text") {
+    payload = googCrypt.encodeByteArray(payload);
+  } else if (this.format_ == "binary") {
+    xhr.setResponseType(XhrIo.ResponseType.ARRAY_BUFFER);
+  }
   xhr.send(method, 'POST', payload);
   return;
 };
@@ -112,8 +127,6 @@ GrpcWebClientBase.prototype.rpcCall = function(
 GrpcWebClientBase.prototype.serverStreaming = function(
     method, request, metadata, methodInfo) {
   var xhr = this.newXhr_();
-  var serialized = methodInfo.requestSerializeFn(request);
-  xhr.headers.addAll(metadata);
 
   var genericTransportInterface = {
     xhr: xhr,
@@ -121,18 +134,28 @@ GrpcWebClientBase.prototype.serverStreaming = function(
   var stream = new GrpcWebClientReadableStream(genericTransportInterface);
   stream.setResponseDeserializeFn(methodInfo.responseDeserializeFn);
 
-  xhr.headers.set('Content-Type', 'application/grpc-web-text');
+  xhr.headers.addAll(metadata);
+  if (this.format_ == "text") {
+    xhr.headers.set('Content-Type', 'application/grpc-web-text');
+    xhr.headers.set('Accept', 'application/grpc-web-text');
+  } else {
+    xhr.headers.set('Content-Type', 'application/grpc-web+proto');
+  }
   xhr.headers.set('X-User-Agent', 'grpc-web-javascript/0.1');
-  xhr.headers.set('Accept', 'application/grpc-web-text');
-
-  var payload = this.encodeRequest_(serialized);
-  payload = googCrypt.encodeByteArray(payload);
-
+  xhr.headers.set('X-Grpc-Web', '1');
   if (this.suppressCorsPreflight_) {
     var headerObject = xhr.headers.toObject();
     xhr.headers.clear();
     method = GrpcWebClientBase.setCorsOverride_(method, headerObject);
   }
+
+  var serialized = methodInfo.requestSerializeFn(request);
+  var payload = this.encodeRequest_(serialized);
+  if (this.format_ == "text") {
+    payload = googCrypt.encodeByteArray(payload);
+  } else if (this.format_ == "binary") {
+    xhr.setResponseType(XhrIo.ResponseType.ARRAY_BUFFER);
+  }
   xhr.send(method, 'POST', payload);
 
   return stream;

javascript/net/grpc/web/grpcwebclientreadablestream.js

@@ -40,6 +40,7 @@ const XhrIo = goog.require('goog.net.XhrIo');
 const XmlHttp = goog.require('goog.net.XmlHttp');
 const events = goog.require('goog.events');
 const googCrypt = goog.require('goog.crypt.base64');
+const googString = goog.require('goog.string');
 const {GenericTransportInterface} = goog.require('grpc.web.GenericTransportInterface');
 const {Status} = goog.require('grpc.web.Status');
 
@@ -114,18 +115,26 @@ const GrpcWebClientReadableStream = function(genericTransportInterface) {
   var self = this;
   events.listen(this.xhr_, EventType.READY_STATE_CHANGE,
                 function(e) {
-    var FrameType = GrpcWebStreamParser.FrameType;
+    var contentType = self.xhr_.getStreamingResponseHeader('Content-Type');
+    if (!contentType) return;
+    contentType = contentType.toLowerCase();
 
-    var responseText = self.xhr_.getResponseText();
-    var newPos = responseText.length - responseText.length % 4;
-    var newData = responseText.substr(self.pos_, newPos - self.pos_);
-    if (newData.length == 0) return;
-    self.pos_ = newPos;
-
-    var byteSource = googCrypt.decodeStringToUint8Array(newData);
+    if (googString.startsWith(contentType, 'application/grpc-web-text')) {
+      var responseText = self.xhr_.getResponseText();
+      var newPos = responseText.length - responseText.length % 4;
+      var newData = responseText.substr(self.pos_, newPos - self.pos_);
+      if (newData.length == 0) return;
+      self.pos_ = newPos;
+      var byteSource = googCrypt.decodeStringToUint8Array(newData);
+    } else if (googString.startsWith(contentType, 'application/grpc')) {
+      var byteSource = new Uint8Array(self.xhr_.getResponse());
+    } else {
+      return;
+    }
     var messages = self.parser_.parse([].slice.call(byteSource));
     if (!messages) return;
 
+    var FrameType = GrpcWebStreamParser.FrameType;
     for (var i = 0; i < messages.length; i++) {
       if (FrameType.DATA in messages[i]) {
         var data = messages[i][FrameType.DATA];

net/grpc/gateway/docker/binary_client_example/Dockerfile

@@ -0,0 +1,40 @@
+# Copyright 2018 Google LLC
+#
+# 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
+#
+#     https://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.
+
+FROM grpc-web:prereqs
+
+ARG EXAMPLE_DIR=/github/grpc-web/net/grpc/gateway/examples/echo
+
+RUN cd /github/grpc-web/packages/grpc-web && \
+  rm -rf node_modules && \
+  npm install && \
+  npm run build && \
+  npm link
+
+RUN protoc -I=$EXAMPLE_DIR echo.proto \
+--plugin=protoc-gen-grpc-web=\
+/github/grpc-web/javascript/net/grpc/web/protoc-gen-grpc-web \
+--js_out=import_style=commonjs:\
+$EXAMPLE_DIR/commonjs-example \
+--grpc-web_out=import_style=commonjs,mode=grpcweb,out=echo_grpc_pb.js:\
+$EXAMPLE_DIR/commonjs-example
+
+RUN cd $EXAMPLE_DIR/commonjs-example && \
+  rm -rf node_modules && \
+  npm install && \
+  npm link grpc-web && \
+  ./node_modules/.bin/browserify client.js > out.js
+
+EXPOSE 8081
+CMD ["nginx"]

net/grpc/gateway/docker/commonjs_client_example/Dockerfile

@@ -16,17 +16,24 @@ FROM grpc-web:prereqs
 
 ARG EXAMPLE_DIR=/github/grpc-web/net/grpc/gateway/examples/echo
 
+RUN cd /github/grpc-web/packages/grpc-web && \
+  rm -rf node_modules && \
+  npm install && \
+  npm run build && \
+  npm link
+
 RUN protoc -I=$EXAMPLE_DIR echo.proto \
 --plugin=protoc-gen-grpc-web=\
 /github/grpc-web/javascript/net/grpc/web/protoc-gen-grpc-web \
 --js_out=import_style=commonjs:\
 $EXAMPLE_DIR/commonjs-example \
---grpc-web_out=import_style=commonjs,mode=grpcweb,out=echo_grpc_pb.js:\
+--grpc-web_out=import_style=commonjs,mode=grpcwebtext,out=echo_grpc_pb.js:\
 $EXAMPLE_DIR/commonjs-example
 
 RUN cd $EXAMPLE_DIR/commonjs-example && \
   rm -rf node_modules && \
   npm install && \
+  npm link grpc-web && \
   ./node_modules/.bin/browserify client.js > out.js
 
 EXPOSE 8081

net/grpc/gateway/docker/grpcwebproxy/Dockerfile

@@ -0,0 +1,20 @@
+FROM golang:alpine
+
+RUN apk add --no-cache git ca-certificates && \
+  rm -rf /var/lib/apt/lists/*
+
+RUN go get -v -u github.com/golang/dep/cmd/dep
+RUN go get -v github.com/improbable-eng/grpc-web/go/grpcwebproxy ; exit 0
+RUN cd src/github.com/improbable-eng/grpc-web && dep ensure
+RUN go get -v -u github.com/improbable-eng/grpc-web/go/grpcwebproxy
+
+ADD ./etc/localhost.crt /etc
+ADD ./etc/localhost.key /etc
+
+ENTRYPOINT [ "/bin/sh", "-c", "exec /go/bin/grpcwebproxy \
+  --backend_addr=echo-server:9090 \
+  --server_bind_address=0.0.0.0 \
+  --server_http_debug_port=8080 \
+  --run_http_server=true \
+  --server_tls_cert_file=/etc/localhost.crt \
+  --server_tls_key_file=/etc/localhost.key " ]

net/grpc/gateway/docker/nginx/Dockerfile

@@ -0,0 +1,21 @@
+# Copyright 2018 Google LLC
+#
+# 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
+#
+#     https://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.
+
+FROM grpc-web:prereqs
+
+RUN cd /github/grpc-web && \
+  make standalone-proxy
+
+EXPOSE 8080
+CMD ["/github/grpc-web/gConnector/nginx.sh"]

net/grpc/gateway/docker/prereqs/Dockerfile

@@ -25,6 +25,7 @@ RUN apt-get update && apt-get install -y \
   default-jdk \
   default-jre \
   libtool \
+  libpcre3-dev \
   libssl-dev \
   make \
   nginx \
@@ -33,9 +34,11 @@ RUN apt-get update && apt-get install -y \
 RUN curl -sL https://deb.nodesource.com/setup_8.x | bash - && \
   apt-get install -y nodejs
 
-RUN git clone https://github.com/grpc/grpc-web /github/grpc-web
+COPY . /github/grpc-web
 
 RUN cd /github/grpc-web && \
+  rm -rf third_party && \
+  git checkout third_party && \
   ./scripts/init_submodules.sh
 
 RUN cd /github/grpc-web/third_party/grpc && \

net/grpc/gateway/examples/echo/Makefile

@@ -41,6 +41,11 @@ package:
 	cp run_example.sh $(ROOT_DIR)/gConnector
 	zip -r $(ROOT_DIR)/gConnector.zip $(ROOT_DIR)/gConnector/*
 
+standalone-proxy:
+	mkdir -p $(ROOT_DIR)/gConnector/$(EXAMPLES_PATH)
+	cp nginx.conf $(ROOT_DIR)/gConnector/conf
+	zip -r $(ROOT_DIR)/gConnector.zip $(ROOT_DIR)/gConnector/*
+
 echo_server: echo.pb.o echo.grpc.pb.o echo_server.o echo_service_impl.o
 	$(CXX) $^ $(LDFLAGS) -o $@
 
@@ -86,7 +91,7 @@ proto-js:
   $(PROTOS_PATH)/protos/pair.proto
 	$(PROTOC) -I=. --js_out=$(JS_IMPORT_STYLE):$(OUT_DIR) ./echo.proto
 	$(PROTOC) -I=. --plugin=protoc-gen-grpc-web=$(GRPC_WEB_PLUGIN_PATH) \
-  --grpc-web_out=out=$(OUT_DIR)/echo.grpc.pb.js,mode=grpcweb:. ./echo.proto
+  --grpc-web_out=out=$(OUT_DIR)/echo.grpc.pb.js,mode=grpcwebtext:. ./echo.proto
 
 install:
 	mkdir -p $(HTML_DIR)/$(EXAMPLES_PATH)

net/grpc/gateway/examples/echo/nginx.conf

@@ -21,11 +21,11 @@ http {
       root /var/www/html;
     }
     location / {
-      grpc_pass localhost:9090;
+      grpc_pass echo-server:9090;
       if ($request_method = 'OPTIONS') {
         add_header 'Access-Control-Allow-Origin' '*';
         add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
-        add_header 'Access-Control-Allow-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Content-Transfer-Encoding,Custom-Header-1,X-Accept-Content-Transfer-Encoding,X-Accept-Response-Streaming,X-User-Agent';
+        add_header 'Access-Control-Allow-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Content-Transfer-Encoding,Custom-Header-1,X-Accept-Content-Transfer-Encoding,X-Accept-Response-Streaming,X-User-Agent,X-Grpc-Web';
         add_header 'Access-Control-Max-Age' 1728000;
         add_header 'Content-Type' 'text/plain charset=UTF-8';
         add_header 'Content-Length' 0;
@@ -34,7 +34,7 @@ http {
       if ($request_method = 'POST') {
         add_header 'Access-Control-Allow-Origin' '*';
         add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
-        add_header 'Access-Control-Allow-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Content-Transfer-Encoding,Custom-Header-1,X-Accept-Content-Transfer-Encoding,X-Accept-Response-Streaming,X-User-Agent';
+        add_header 'Access-Control-Allow-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Content-Transfer-Encoding,Custom-Header-1,X-Accept-Content-Transfer-Encoding,X-Accept-Response-Streaming,X-User-Agent,X-Grpc-Web';
         add_header 'Access-Control-Expose-Headers' 'Content-Transfer-Encoding';
       }
     }

net/grpc/gateway/examples/echo/tutorial.md

@@ -99,13 +99,13 @@ To generate the client stub JS file, now run this command:
 
 ```sh
 $ protoc -I=. --plugin=protoc-gen-grpc-web=<path to plugin> \
-  --grpc-web_out=out=echo.grpc.pb.js,mode=grpcweb:. ./echo.proto
+  --grpc-web_out=out=echo.grpc.pb.js,mode=grpcwebtext:. ./echo.proto
 ```
 
 The format for the `--grpc-web_out` param is
 
 ```sh
---grpc-web_out=out=<filename>,mode=grpcweb:<output dir>
+--grpc-web_out=out=<filename>,mode=grpcwebtext:<output dir>
 ```
 
 Our command generates the client stub in the file `echo.grpc.pb.js`.

packages/grpc-web/README.md

@@ -38,7 +38,7 @@ This example is using the `echo.proto` file from the [Echo Example](https://gith
 2. Generate your client with `protoc` and the `protoc-gen-grpc-web` plugin. Make sure you set the import_style for both `js_out` and `grpc-web_out` to **commonjs**. It is also important that both your js and grpc-web output to the same directory.
 
     ```shell
-    protoc echo.proto --js_out=import_style=commonjs:generated --grpc-web_out=import_style=commonjs,mode=grpcweb,out=echo_grpc_pb.js:generated
+    protoc echo.proto --js_out=import_style=commonjs:generated --grpc-web_out=import_style=commonjs,mode=grpcwebtext,out=echo_grpc_pb.js:generated
     ```
 
 3. Start using your generated client!