#15.1 Extend packager server to receive signals from Sampling Profiler

Reviewed By: bestander

Differential Revision: D3606098

fbshipit-source-id: ec55030dd1b3a27f0595650da1ce01fe1ac9116c

ReactAndroid/src/main/java/com/facebook/react/devsupport/DevSupportManagerImpl.java

@@ -31,6 +31,8 @@ import android.content.IntentFilter;
 import android.content.pm.PackageInfo;
 import android.content.pm.PackageManager;
 import android.hardware.SensorManager;
+import android.net.Uri;
+import android.os.AsyncTask;
 import android.view.WindowManager;
 import android.widget.Toast;
 
@@ -50,6 +52,11 @@ import com.facebook.react.common.futures.SimpleSettableFuture;
 import com.facebook.react.devsupport.StackTraceHelper.StackFrame;
 import com.facebook.react.modules.debug.DeveloperSettings;
 
+import okhttp3.MediaType;
+import okhttp3.OkHttpClient;
+import okhttp3.Request;
+import okhttp3.RequestBody;
+
 /**
  * Interface for accessing and interacting with development features. Following features
  * are supported through this manager class:
@@ -114,6 +121,40 @@ public class DevSupportManagerImpl implements DevSupportManager {
   private int mLastErrorCookie = 0;
   private @Nullable ErrorType mLastErrorType;
 
+
+  private static class JscProfileTask extends AsyncTask<String, Void, Void> {
+    private static final MediaType JSON =
+      MediaType.parse("application/json; charset=utf-8");
+
+    private final String mSourceUrl;
+
+    private JscProfileTask(String sourceUrl) {
+      mSourceUrl = sourceUrl;
+    }
+
+    @Override
+    protected Void doInBackground(String... jsonData) {
+      try {
+        String jscProfileUrl =
+            Uri.parse(mSourceUrl).buildUpon()
+                .path("/jsc-profile")
+                .query(null)
+                .build()
+                .toString();
+        OkHttpClient client = new OkHttpClient();
+        for (String json: jsonData) {
+          RequestBody body = RequestBody.create(JSON, json);
+          Request request =
+            new Request.Builder().url(jscProfileUrl).post(body).build();
+          client.newCall(request).execute();
+        }
+      } catch (IOException e) {
+        FLog.e(ReactConstants.TAG, "Failed not talk to server", e);
+      }
+      return null;
+    }
+  }
+
   public DevSupportManagerImpl(
     Context applicationContext,
     ReactInstanceDevCommandsHandler reactInstanceCommandsHandler,
@@ -389,6 +430,11 @@ public class DevSupportManagerImpl implements DevSupportManager {
                     ? "Started JSC Sampling Profiler"
                     : "Stopped JSC Sampling Profiler",
                   Toast.LENGTH_LONG).show();
+                if (result != null) {
+                  new JscProfileTask(getSourceUrl()).executeOnExecutor(
+                      AsyncTask.THREAD_POOL_EXECUTOR,
+                      result);
+                }
               }
             } catch (JSCSamplingProfiler.ProfilerException e) {
               showNewJavaError(e.getMessage(), e);

local-cli/server/middleware/jscProfilerMiddleware.js

@@ -0,0 +1,36 @@
+/**
+ * Copyright (c) 2015-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+'use strict';
+
+const fs = require('fs');
+
+module.exports = function(req, res, next) {
+  if (req.url !== '/jsc-profile') {
+    next();
+    return;
+  }
+
+  console.log('Dumping JSC profile information...');
+  const dumpName = '/tmp/jsc-profile_' + Date.now() + '.cpuprofile';
+  fs.writeFile(dumpName, req.rawBody, (err) => {
+    var response = '';
+    if (err) {
+      response =
+        'An error occured when trying to save the profile at ' + dumpName;
+      console.error(response, err);
+    } else {
+      response =
+        'Your profile was generated at\n\n' + dumpName + '\n\n' +
+        'Open `Chrome Dev Tools > Profiles > Load` '
+        + 'and select the profile to visualize it.';
+      console.log(response);
+    }
+    res.end(response);
+  });
+};

local-cli/server/runServer.js

@@ -13,6 +13,7 @@ const connect = require('connect');
 const cpuProfilerMiddleware = require('./middleware/cpuProfilerMiddleware');
 const getDevToolsMiddleware = require('./middleware/getDevToolsMiddleware');
 const http = require('http');
+const jscProfilerMiddleware = require('./middleware/jscProfilerMiddleware');
 const loadRawBodyMiddleware = require('./middleware/loadRawBodyMiddleware');
 const messageSocket = require('./util/messageSocket.js');
 const openStackFrameInEditorMiddleware = require('./middleware/openStackFrameInEditorMiddleware');
@@ -41,6 +42,7 @@ function runServer(args, config, readyCallback) {
     .use(systraceProfileMiddleware)
     .use(heapCaptureMiddleware)
     .use(cpuProfilerMiddleware)
+    .use(jscProfilerMiddleware)
     .use(indexPageMiddleware)
     .use(packagerServer.processRequest.bind(packagerServer));