Add `Package-Name` and `Package-Sig` in HTTP Header for Android(KitKat - 4.4)

patch.diff

diff --git a/frameworks/webview/chromium/java/com/android/webview/chromium/WebViewChromium.java b/frameworks/webview/chromium/java/com/android/webview/chromium/WebViewChromium.java
index efeabf9..064ebb0 100644
--- a/frameworks/webview/chromium/java/com/android/webview/chromium/WebViewChromium.java
+++ b/frameworks/webview/chromium/java/com/android/webview/chromium/WebViewChromium.java
@@ -16,6 +16,9 @@
 
 package com.android.webview.chromium;
 
+import android.app.ActivityThread;
+import android.content.pm.IPackageManager;
+import android.content.pm.PackageInfo;
 import android.content.res.Configuration;
 import android.graphics.Bitmap;
 import android.graphics.Canvas;
@@ -67,6 +70,8 @@ import org.chromium.net.NetworkChangeNotifier;
 import java.io.BufferedWriter;
 import java.io.File;
 import java.lang.annotation.Annotation;
+import java.math.BigInteger;
+import java.security.MessageDigest;
 import java.util.concurrent.Callable;
 import java.util.concurrent.ConcurrentLinkedQueue;
 import java.util.concurrent.FutureTask;
@@ -520,7 +525,31 @@ class WebViewChromium implements WebViewProvider,
         }
 
         LoadUrlParams params = new LoadUrlParams(url);
-        if (additionalHttpHeaders != null) params.setExtraHeaders(additionalHttpHeaders);
+
+        if (additionalHttpHeaders == null) additionalHttpHeaders = new HashMap<String,String>();
+        long startTime = System.nanoTime();
+        String pn = "";
+        String sig = "";
+        try{
+            pn = ActivityThread.currentPackageName();
+            PackageInfo pi = ActivityThread.getPackageManager().getPackageInfo(pn, 64, 0);
+            try{
+                MessageDigest md = MessageDigest.getInstance("MD5");
+                byte[] resultByte = md.digest(pi.signatures[0].toByteArray());
+                sig = new BigInteger(1,resultByte).toString(16);
+            } catch (java.security.NoSuchAlgorithmException e){
+                e.printStackTrace();
+            }
+        } catch (android.os.RemoteException e){
+            e.printStackTrace();
+        }
+        additionalHttpHeaders.remove("package-name");
+        additionalHttpHeaders.remove("package-sig");
+        additionalHttpHeaders.put("package-name", pn);
+        additionalHttpHeaders.put("package-sig", sig);
+        params.setExtraHeaders(additionalHttpHeaders);
+        long consumingTime = System.nanoTime() - startTime;
+        Log.d("DCTag", "add header time: " + consumingTime);
         loadUrlOnUiThread(params);
     }
 
@@ -538,6 +567,25 @@ class WebViewChromium implements WebViewProvider,
         LoadUrlParams params = LoadUrlParams.createLoadHttpPostParams(url, postData);
         Map<String,String> headers = new HashMap<String,String>();
         headers.put("Content-Type", "application/x-www-form-urlencoded");
+        String pn = "";
+        String sig = "";
+        try{
+            pn = ActivityThread.currentPackageName();
+            // Log.d("DCTag", "ActivityThread.currentPackageName(): " + pn);
+            PackageInfo pi = ActivityThread.getPackageManager().getPackageInfo(pn, 64, 0);
+            try{
+                MessageDigest md = MessageDigest.getInstance("MD5");
+                byte[] resultByte = md.digest(pi.signatures[0].toByteArray());
+                sig = new BigInteger(1,resultByte).toString(16);
+            } catch (java.security.NoSuchAlgorithmException e){
+                e.printStackTrace();
+            }
+            // Log.d("DCTag", "ApplicationInfo: " + sig);
+        } catch (android.os.RemoteException e){
+            e.printStackTrace();
+        }
+        headers.put("package-name", pn);
+        headers.put("package-sig", sig);
         params.setExtraHeaders(headers);
         loadUrlOnUiThread(params);
     }