Moving gRPC support interfaces out of cronet and into a new component.

components/grpc_support/bidirectional_stream_c.cc

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "components/grpc_support/include/bidirectional_stream_c.h"
+
+#include <stdbool.h>
+
+#include <memory>
+#include <string>
+#include <vector>
+
+#include "base/bind.h"
+#include "base/location.h"
+#include "base/logging.h"
+#include "base/macros.h"
+#include "base/memory/ptr_util.h"
+#include "base/memory/ref_counted.h"
+#include "base/strings/string_number_conversions.h"
+#include "base/strings/string_split.h"
+#include "components/grpc_support/bidirectional_stream.h"
+#include "net/base/io_buffer.h"
+#include "net/base/net_errors.h"
+#include "net/base/request_priority.h"
+#include "net/http/bidirectional_stream.h"
+#include "net/http/bidirectional_stream_request_info.h"
+#include "net/http/http_network_session.h"
+#include "net/http/http_response_headers.h"
+#include "net/http/http_status_code.h"
+#include "net/http/http_transaction_factory.h"
+#include "net/http/http_util.h"
+#include "net/spdy/spdy_header_block.h"
+#include "net/ssl/ssl_info.h"
+#include "net/url_request/http_user_agent_settings.h"
+#include "net/url_request/url_request_context.h"
+#include "url/gurl.h"
+
+namespace {
+
+class HeadersArray : public bidirectional_stream_header_array {
+ public:
+  HeadersArray(const net::SpdyHeaderBlock& header_block);
+  ~HeadersArray();
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(HeadersArray);
+  base::StringPairs headers_strings_;
+};
+
+HeadersArray::HeadersArray(const net::SpdyHeaderBlock& header_block)
+    : headers_strings_(header_block.size()) {
+  // Count and headers are inherited from parent structure.
+  count = capacity = header_block.size();
+  headers = new bidirectional_stream_header[count];
+  size_t i = 0;
+  // Copy headers into |headers_strings_| because string pieces are not
+  // '\0'-terminated.
+  for (const auto& it : header_block) {
+    headers_strings_[i].first = it.first.as_string();
+    headers_strings_[i].second = it.second.as_string();
+    headers[i].key = headers_strings_[i].first.c_str();
+    headers[i].value = headers_strings_[i].second.c_str();
+    ++i;
+  }
+}
+
+HeadersArray::~HeadersArray() {
+  delete[] headers;
+}
+
+class BidirectionalStreamAdapter
+    : public grpc_support::BidirectionalStream::Delegate {
+ public:
+  BidirectionalStreamAdapter(stream_engine* engine,
+                             void* annotation,
+                             bidirectional_stream_callback* callback);
+
+  virtual ~BidirectionalStreamAdapter();
+
+  void OnStreamReady() override;
+
+  void OnHeadersReceived(const net::SpdyHeaderBlock& headers_block,
+                         const char* negotiated_protocol) override;
+
+  void OnDataRead(char* data, int size) override;
+
+  void OnDataSent(const char* data) override;
+
+  void OnTrailersReceived(const net::SpdyHeaderBlock& trailers_block) override;
+
+  void OnSucceeded() override;
+
+  void OnFailed(int error) override;
+
+  void OnCanceled() override;
+
+  bidirectional_stream* c_stream() const { return c_stream_.get(); }
+
+  static grpc_support::BidirectionalStream* GetStream(
+      bidirectional_stream* stream);
+
+  static void DestroyAdapterForStream(bidirectional_stream* stream);
+
+ private:
+  void DestroyOnNetworkThread();
+
+  // None of these objects are owned by |this|.
+  net::URLRequestContextGetter* request_context_getter_;
+  grpc_support::BidirectionalStream* bidirectional_stream_;
+  // C side
+  std::unique_ptr<bidirectional_stream> c_stream_;
+  bidirectional_stream_callback* c_callback_;
+};
+
+BidirectionalStreamAdapter::BidirectionalStreamAdapter(
+    stream_engine* engine,
+    void* annotation,
+    bidirectional_stream_callback* callback)
+    : request_context_getter_(
+          reinterpret_cast<net::URLRequestContextGetter*>(engine->obj)),
+      c_stream_(base::MakeUnique<bidirectional_stream>()),
+      c_callback_(callback) {
+  DCHECK(request_context_getter_);
+  bidirectional_stream_ =
+      new grpc_support::BidirectionalStream(request_context_getter_, this);
+  c_stream_->obj = this;
+  c_stream_->annotation = annotation;
+}
+
+BidirectionalStreamAdapter::~BidirectionalStreamAdapter() {}
+
+void BidirectionalStreamAdapter::OnStreamReady() {
+  DCHECK(c_callback_->on_response_headers_received);
+  c_callback_->on_stream_ready(c_stream());
+}
+
+void BidirectionalStreamAdapter::OnHeadersReceived(
+    const net::SpdyHeaderBlock& headers_block,
+    const char* negotiated_protocol) {
+  DCHECK(c_callback_->on_response_headers_received);
+  HeadersArray response_headers(headers_block);
+  c_callback_->on_response_headers_received(c_stream(), &response_headers,
+                                            negotiated_protocol);
+}
+
+void BidirectionalStreamAdapter::OnDataRead(char* data, int size) {
+  DCHECK(c_callback_->on_read_completed);
+  c_callback_->on_read_completed(c_stream(), data, size);
+}
+
+void BidirectionalStreamAdapter::OnDataSent(const char* data) {
+  DCHECK(c_callback_->on_write_completed);
+  c_callback_->on_write_completed(c_stream(), data);
+}
+
+void BidirectionalStreamAdapter::OnTrailersReceived(
+    const net::SpdyHeaderBlock& trailers_block) {
+  DCHECK(c_callback_->on_response_trailers_received);
+  HeadersArray response_trailers(trailers_block);
+  c_callback_->on_response_trailers_received(c_stream(), &response_trailers);
+}
+
+void BidirectionalStreamAdapter::OnSucceeded() {
+  DCHECK(c_callback_->on_succeded);
+  c_callback_->on_succeded(c_stream());
+}
+
+void BidirectionalStreamAdapter::OnFailed(int error) {
+  DCHECK(c_callback_->on_failed);
+  c_callback_->on_failed(c_stream(), error);
+}
+
+void BidirectionalStreamAdapter::OnCanceled() {
+  DCHECK(c_callback_->on_canceled);
+  c_callback_->on_canceled(c_stream());
+}
+
+grpc_support::BidirectionalStream* BidirectionalStreamAdapter::GetStream(
+    bidirectional_stream* stream) {
+  DCHECK(stream);
+  BidirectionalStreamAdapter* adapter =
+      static_cast<BidirectionalStreamAdapter*>(stream->obj);
+  DCHECK(adapter->c_stream() == stream);
+  DCHECK(adapter->bidirectional_stream_);
+  return adapter->bidirectional_stream_;
+}
+
+void BidirectionalStreamAdapter::DestroyAdapterForStream(
+    bidirectional_stream* stream) {
+  DCHECK(stream);
+  BidirectionalStreamAdapter* adapter =
+      static_cast<BidirectionalStreamAdapter*>(stream->obj);
+  DCHECK(adapter->c_stream() == stream);
+  // Destroy could be called from any thread, including network thread (if
+  // posting task to executor throws an exception), but is posted, so |this|
+  // is valid until calling task is complete.
+  adapter->bidirectional_stream_->Destroy();
+  adapter->request_context_getter_->GetNetworkTaskRunner()->PostTask(
+      FROM_HERE, base::Bind(&BidirectionalStreamAdapter::DestroyOnNetworkThread,
+                            base::Unretained(adapter)));
+}
+
+void BidirectionalStreamAdapter::DestroyOnNetworkThread() {
+  DCHECK(request_context_getter_->GetNetworkTaskRunner()
+             ->BelongsToCurrentThread());
+  delete this;
+}
+
+}  // namespace
+
+bidirectional_stream* bidirectional_stream_create(
+    stream_engine* engine,
+    void* annotation,
+    bidirectional_stream_callback* callback) {
+  // Allocate new C++ adapter that will invoke |callback|.
+  BidirectionalStreamAdapter* stream_adapter =
+      new BidirectionalStreamAdapter(engine, annotation, callback);
+  return stream_adapter->c_stream();
+}
+
+int bidirectional_stream_destroy(bidirectional_stream* stream) {
+  BidirectionalStreamAdapter::DestroyAdapterForStream(stream);
+  return 1;
+}
+
+void bidirectional_stream_disable_auto_flush(bidirectional_stream* stream,
+                                             bool disable_auto_flush) {
+  BidirectionalStreamAdapter::GetStream(stream)->disable_auto_flush(
+      disable_auto_flush);
+}
+
+void bidirectional_stream_delay_request_headers_until_flush(
+    bidirectional_stream* stream,
+    bool delay_headers_until_flush) {
+  BidirectionalStreamAdapter::GetStream(stream)->delay_headers_until_flush(
+      delay_headers_until_flush);
+}
+
+int bidirectional_stream_start(bidirectional_stream* stream,
+                               const char* url,
+                               int priority,
+                               const char* method,
+                               const bidirectional_stream_header_array* headers,
+                               bool end_of_stream) {
+  grpc_support::BidirectionalStream* internal_stream =
+      BidirectionalStreamAdapter::GetStream(stream);
+  net::HttpRequestHeaders request_headers;
+  if (headers) {
+    for (size_t i = 0; i < headers->count; ++i) {
+      std::string name(headers->headers[i].key);
+      std::string value(headers->headers[i].value);
+      if (!net::HttpUtil::IsValidHeaderName(name) ||
+          !net::HttpUtil::IsValidHeaderValue(value)) {
+        DLOG(ERROR) << "Invalid Header " << name << "=" << value;
+        return i + 1;
+      }
+      request_headers.SetHeader(name, value);
+    }
+  }
+  return internal_stream->Start(url, priority, method, request_headers,
+                                end_of_stream);
+}
+
+int bidirectional_stream_read(bidirectional_stream* stream,
+                              char* buffer,
+                              int capacity) {
+  return BidirectionalStreamAdapter::GetStream(stream)->ReadData(buffer,
+                                                                 capacity);
+}
+
+int bidirectional_stream_write(bidirectional_stream* stream,
+                               const char* buffer,
+                               int count,
+                               bool end_of_stream) {
+  return BidirectionalStreamAdapter::GetStream(stream)->WriteData(
+      buffer, count, end_of_stream);
+}
+
+void bidirectional_stream_flush(bidirectional_stream* stream) {
+  return BidirectionalStreamAdapter::GetStream(stream)->Flush();
+}
+
+void bidirectional_stream_cancel(bidirectional_stream* stream) {
+  BidirectionalStreamAdapter::GetStream(stream)->Cancel();
+}