Searching in browsers cache (Chrome, Firefox)

2026-09-27 13:01:01 +00:00 · 2013-09-09 21:48:38 +02:00
parent 97385bd634
commit ca8f9b9e1a
38 changed files with 1961 additions and 19 deletions
@@ -0,0 +1,106 @@
+package com.jpexs.browsers.cache.chrome;
+
+import com.jpexs.browsers.cache.RafInputStream;
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.RandomAccessFile;
+import java.util.Map;
+
+/**
+ *
+ * @author JPEXS
+ */
+public class CacheAddr {
+
+    public static final int EXTERNAL = 0;
+    public static final int RANKINGS = 1;
+    public static final int BLOCK_256 = 2;
+    public static final int BLOCK_1K = 3;
+    public static final int BLOCK_4K = 4;
+    public static final int BLOCK_FILES = 5;
+    public static final int BLOCK_ENTRIES = 6;
+    public static final int BLOCK_EVICTED = 7;
+    public static final String blockNames[] = new String[]{"EXTERNAL", "RANKINGS", "BLOCK_256", "BLOCK_1K", "BLOCK_4K", "BLOCK_FILES", "BLOCK_ENTRIES", "BLOCK_EVICTED"};
+    public static final int blockSizes[] = new int[]{0, 36, 256, 1024, 4096, 8, 104, 48};
+    public static final long kInitializedMask = 0x80000000L;
+    public static final long kFileTypeMask = 0x70000000L;
+    public static final int kFileTypeOffset = 28;
+    public static final long kReservedBitsMask = 0x0c000000L;
+    public static final long kNumBlocksMask = 0x03000000L;
+    public static final int kNumBlocksOffset = 24;
+    public static final long kFileSelectorMask = 0x00ff0000L;
+    public static final int FileSelectorOffset = 16;
+    public static final long kStartBlockMask = 0x0000FFFFL;
+    public static final long kFileNameMask = 0x0FFFFFFFL;
+    public boolean initialized;
+    public int fileType;
+    public int numBlocks;
+    public int fileSelector;
+    public int startBlock;
+    public int fileName;
+    public long val;
+    public File rootPath;
+    private Map<Integer, RandomAccessFile> dataFiles;
+    private File externalFilesDir;
+
+    public CacheAddr(InputStream is, File rootPath, Map<Integer, RandomAccessFile> dataFiles, File externalFilesDir) throws IOException {
+        this.dataFiles = dataFiles;
+        this.rootPath = rootPath;
+        this.externalFilesDir = externalFilesDir;
+        IndexInputStream iis = new IndexInputStream(is);
+        val = iis.readUInt32();
+        initialized = (val & kInitializedMask) == kInitializedMask;
+        fileType = (int) ((val & kFileTypeMask) >> kFileTypeOffset);
+        if (fileType == EXTERNAL) {
+            fileName = (int) (val & kFileNameMask);
+        } else {
+            numBlocks = (int) ((val & kNumBlocksMask) >> kNumBlocksOffset);
+            fileSelector = (int) ((val & kFileSelectorMask) >> FileSelectorOffset);
+            startBlock = (int) (val & kStartBlockMask);
+        }
+    }
+
+    @Override
+    public String toString() {
+
+        String ft = blockNames[fileType];
+        if (fileType == EXTERNAL) {
+            return ft + ":" + fileName;
+        }
+        if (!initialized) {
+            return "uninitialized";
+        }
+        return ft + ": numBlocks " + numBlocks + " fileSelector " + fileSelector + " startBlock " + startBlock;
+    }
+
+    public InputStream getInputStream() throws IOException {
+        if (!initialized) {
+            return null;
+        }
+        switch (fileType) {
+            case EXTERNAL:
+                String fileNameStr = Long.toHexString(fileName);
+                while (fileNameStr.length() < 6) {
+                    fileNameStr = "0" + fileNameStr;
+                }
+                fileNameStr = "f_" + fileNameStr;
+                return new RafInputStream(new RandomAccessFile(new File(externalFilesDir, fileNameStr), "r"));
+            case BLOCK_1K:
+            case BLOCK_256:
+            case BLOCK_4K:
+
+                RandomAccessFile raf;
+
+                if (dataFiles.containsKey(fileSelector)) {
+                    raf = dataFiles.get(fileSelector);
+                } else {
+                    raf = new RandomAccessFile(rootPath + "\\data_" + fileSelector, "r");
+                    dataFiles.put(fileSelector, raf);
+                }
+                raf.seek(BlockFileHeader.kBlockHeaderSize + startBlock * blockSizes[fileType]);
+                return new RafInputStream(raf);
+        }
+        return null;
+    }
+}