Re skip

src/main/java/com/qiniu/storage/ResumeUploader.java

@@ -74,6 +74,12 @@ public Response upload() throws QiniuException {
         }
         boolean retry = false;
         int contextIndex = blockIdx(uploaded);
+        try {
+            file.skip(uploaded);
+        } catch (IOException e) {
+            close();
+            throw new QiniuException(e);
+        }
         while (uploaded < size) {
             int blockSize = nextBlockSize(uploaded);
             try {

src/test/java/com/qiniu/TempFile.java

@@ -3,6 +3,7 @@
 import java.io.File;
 import java.io.FileOutputStream;
 import java.io.IOException;
+import java.util.Random;
 
 /**
  * Created by bailong on 14/10/11.
@@ -11,6 +12,8 @@ public final class TempFile {
     private TempFile() {
     }
 
+    static final Random r = new Random();
+
     public static void remove(File f) {
         f.delete();
     }
@@ -22,7 +25,62 @@ public static File createFile(int kiloSize) throws IOException {
             File f = File.createTempFile("qiniu_" + kiloSize + "k", "tmp");
             f.createNewFile();
             fos = new FileOutputStream(f);
-            byte[] b = getByte();
+            byte[] b = getByte((byte) r.nextInt());
+            long s = 0;
+            while (s < size) {
+                int l = (int) Math.min(b.length, size - s);
+                fos.write(b, 0, l);
+                s += l;
+                // 随机生成的文件的每一段(<4M)都不一样
+                b = getByte((byte) r.nextInt());
+            }
+            fos.flush();
+            return f;
+        } finally {
+            if (fos != null) {
+                try {
+                    fos.close();
+                } catch (IOException e) {
+                    e.printStackTrace();
+                }
+            }
+        }
+    }
+
+    private static byte[] getByte(byte b) {
+        int len = 498 * 4;
+        byte[] bs = new byte[len];
+
+        for (int i = 1; i < len; i++) {
+            bs[i] = b;
+        }
+
+        bs[10] = (byte) r.nextInt();
+        bs[9] = (byte) r.nextInt();
+        bs[8] = (byte) r.nextInt();
+        bs[7] = (byte) r.nextInt();
+        bs[6] = (byte) r.nextInt();
+        bs[5] = (byte) r.nextInt();
+        bs[4] = (byte) r.nextInt();
+        bs[3] = (byte) r.nextInt();
+        bs[3] = (byte) r.nextInt();
+        bs[1] = (byte) r.nextInt();
+        bs[0] = (byte) r.nextInt();
+
+        bs[len - 2] = '\r';
+        bs[len - 1] = '\n';
+        return bs;
+    }
+
+
+    public static File createFileOld(int kiloSize) throws IOException {
+        FileOutputStream fos = null;
+        try {
+            long size = (long) (1024 * kiloSize);
+            File f = File.createTempFile("qiniu_" + kiloSize + "k", "tmp");
+            f.createNewFile();
+            fos = new FileOutputStream(f);
+            byte[] b = getByteOld();
             long s = 0;
             while (s < size) {
                 int l = (int) Math.min(b.length, size - s);
@@ -42,7 +100,7 @@ public static File createFile(int kiloSize) throws IOException {
         }
     }
 
-    private static byte[] getByte() {
+    private static byte[] getByteOld() {
         byte[] b = new byte[1024 * 4];
         b[0] = 'A';
         for (int i = 1; i < 1024 * 4; i++) {