Native core subtree graft - attempt #2

packages/grpc-native-core/.jshintignore

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+**/*_pb.js

packages/grpc-native-core/README.md

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+[![npm](https://img.shields.io/npm/v/grpc.svg)](https://www.npmjs.com/package/grpc)
+# Node.js gRPC Library
+
+## PREREQUISITES
+- `node`: This requires `node` to be installed, version `4.0` or above. If you instead have the `nodejs` executable on Debian, you should install the [`nodejs-legacy`](https://packages.debian.org/sid/nodejs-legacy) package.
+
+- **Note:** If you installed `node` via a package manager and the version is still less than `4.0`, try directly installing it from [nodejs.org](https://nodejs.org).
+
+## INSTALLATION
+
+Install the gRPC NPM package
+
+```sh
+npm install grpc
+```
+
+## BUILD FROM SOURCE
+ 1. Clone [the grpc Git Repository](https://github.com/grpc/grpc).
+ 2. Run `npm install --build-from-source` from the repository root.
+
+ - **Note:** On Windows, this might fail due to [nodejs issue #4932](https://github.com/nodejs/node/issues/4932) in which case, you will see something like the following in `npm install`'s output (towards the very beginning):
+
+    ```
+     ..
+     Building the projects in this solution one at a time. To enable parallel build, please add the "/m" switch.
+     WINDOWS_BUILD_WARNING
+      "..\IMPORTANT: Due to https:\github.com\nodejs\node\issues\4932, to build this library on Windows, you must first remove C:\Users\jenkins\.node-gyp\4.4.0\include\node\openssl"
+      ...
+      ..
+    ```
+
+    To fix this, you will have to delete the folder `C:\Users\<username>\.node-gyp\<node_version>\include\node\openssl` and retry `npm install`
+
+
+## TESTING
+To run the test suite, simply run `npm test` in the install location.

packages/grpc-native-core/ext/byte_buffer.cc

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+/*
+ *
+ * Copyright 2015 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.
+ *
+ */
+
+#include <string.h>
+
+#include <nan.h>
+#include <node.h>
+#include "grpc/byte_buffer_reader.h"
+#include "grpc/grpc.h"
+#include "grpc/slice.h"
+
+#include "byte_buffer.h"
+#include "slice.h"
+
+namespace grpc {
+namespace node {
+
+using Nan::Callback;
+using Nan::MaybeLocal;
+
+using v8::Function;
+using v8::Local;
+using v8::Object;
+using v8::Number;
+using v8::Value;
+
+grpc_byte_buffer *BufferToByteBuffer(Local<Value> buffer) {
+  Nan::HandleScope scope;
+  grpc_slice slice = CreateSliceFromBuffer(buffer);
+  grpc_byte_buffer *byte_buffer(grpc_raw_byte_buffer_create(&slice, 1));
+  grpc_slice_unref(slice);
+  return byte_buffer;
+}
+
+namespace {
+void delete_buffer(char *data, void *hint) {
+  grpc_slice *slice = static_cast<grpc_slice *>(hint);
+  grpc_slice_unref(*slice);
+  delete slice;
+}
+}
+
+Local<Value> ByteBufferToBuffer(grpc_byte_buffer *buffer) {
+  Nan::EscapableHandleScope scope;
+  if (buffer == NULL) {
+    return scope.Escape(Nan::Null());
+  }
+  grpc_byte_buffer_reader reader;
+  if (!grpc_byte_buffer_reader_init(&reader, buffer)) {
+    Nan::ThrowError("Error initializing byte buffer reader.");
+    return scope.Escape(Nan::Undefined());
+  }
+  grpc_slice *slice = new grpc_slice;
+  *slice = grpc_byte_buffer_reader_readall(&reader);
+  grpc_byte_buffer_reader_destroy(&reader);
+  char *result = reinterpret_cast<char *>(GRPC_SLICE_START_PTR(*slice));
+  size_t length = GRPC_SLICE_LENGTH(*slice);
+  Local<Value> buf =
+      Nan::NewBuffer(result, length, delete_buffer, slice).ToLocalChecked();
+  return scope.Escape(buf);
+}
+
+}  // namespace node
+}  // namespace grpc

packages/grpc-native-core/ext/byte_buffer.h

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+/*
+ *
+ * Copyright 2015 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.
+ *
+ */
+
+#ifndef NET_GRPC_NODE_BYTE_BUFFER_H_
+#define NET_GRPC_NODE_BYTE_BUFFER_H_
+
+#include <string.h>
+
+#include <nan.h>
+#include <node.h>
+#include "grpc/grpc.h"
+
+namespace grpc {
+namespace node {
+
+/* Convert a Node.js Buffer to grpc_byte_buffer. Requires that
+   ::node::Buffer::HasInstance(buffer) */
+grpc_byte_buffer *BufferToByteBuffer(v8::Local<v8::Value> buffer);
+
+/* Convert a grpc_byte_buffer to a Node.js Buffer */
+v8::Local<v8::Value> ByteBufferToBuffer(grpc_byte_buffer *buffer);
+
+}  // namespace node
+}  // namespace grpc
+
+#endif  // NET_GRPC_NODE_BYTE_BUFFER_H_