add base64Decode and fix PutPolicy Expire

src/main/java/com/qiniu/api/net/EncodeUtils.java

@@ -36,7 +36,19 @@ public static byte[] urlsafeEncodeBytes(byte[] src) {
 		}
 		return b2;
 	}
-
+
+	public static byte[] urlsafeBase64Decode(String encoded){
+		byte[] rawbs = encoded.getBytes();
+		for(int i=0;i<rawbs.length;i++){
+			if(rawbs[i] == '_'){
+				rawbs[i] = '/';
+			}else if(rawbs[i] == '-'){
+				rawbs[i] = '+';
+			}
+		}
+		return Base64.decodeBase64(rawbs);
+	}
+
 	public static String urlsafeEncodeString(byte[] src) {
 		return new String(urlsafeEncodeBytes(src));
 	}

src/main/java/com/qiniu/api/rs/PutPolicy.java

@@ -32,6 +32,8 @@ public class PutPolicy {
 	public String endUser;
 	/** 可选 */
 	public long expires;
+
+	public long deadline;
 
 	public PutPolicy(String scope) {
 		this.scope = scope;
@@ -59,7 +61,7 @@ private String marshal() throws JSONException {
 		if (this.endUser != null && this.endUser.length() > 0) {
 			stringer.key("endUser").value(this.endUser);
 		}
-		stringer.key("deadline").value(this.expires);
+		stringer.key("deadline").value(this.deadline);
 		stringer.endObject();
 
 		return stringer.toString();
@@ -78,7 +80,7 @@ public String token(Mac mac) throws AuthException, JSONException {
 		if (this.expires == 0) {
 			this.expires = 3600; // 3600s, default.
 		}
-		this.expires = System.currentTimeMillis() / 1000 + expires;
+		this.deadline = System.currentTimeMillis() / 1000 + this.expires;
 		byte[] data = this.marshal().getBytes();
 		return DigestAuth.signWithData(mac, data);
 	}

src/test/java/com/qiniu/testing/UtilTest.java

@@ -0,0 +1,23 @@
+package com.qiniu.testing;
+
+
+import junit.framework.TestCase;
+
+import com.qiniu.api.net.EncodeUtils;
+
+public class UtilTest extends TestCase {
+
+	// just upload an image in testdata.
+	public void test() throws Exception {
+		String expectString = "1234567890abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ~!@#$%^&*()_+}{:?><-=,./;'[]";
+		String encodedString = "MTIzNDU2Nzg5MGFiY2RlZmdoaWprbG1ub3BxcnN0dXZ3eHl6QUJDREVGR0hJSktMTU5PUFFSU1RVVldYWVp-IUAjJCVeJiooKV8rfXs6Pz48LT0sLi87J1td";
+		byte[] rawBytes = EncodeUtils.urlsafeBase64Decode(encodedString);
+		String decoded = new String(rawBytes);
+		assertTrue(expectString.equals(decoded));
+	}
+
+	@Override
+	public void tearDown() {
+		// do nothing here.
+	}
+}