5xx change back to source

Author: longbai

library/src/main/java/com/qiniu/android/http/ResponseInfo.java

@@ -81,6 +81,10 @@ public boolean isServerError() {
         return (statusCode >= 500 && statusCode < 600 && statusCode != 579) || statusCode == 996;
     }
 
+    public boolean needSwitchServer(){
+        return isNetworkBroken() || (statusCode >= 500 && statusCode < 600 && statusCode != 579);
+    }
+
     public boolean needRetry() {
         return isNetworkBroken() || isServerError() || statusCode == 406 || (statusCode == 200 && error != null);
     }

library/src/main/java/com/qiniu/android/storage/FormUploader.java

@@ -121,7 +121,7 @@ public void complete(ResponseInfo info, JSONObject response) {
                     }
                 };
                 String host = Config.UP_HOST;
-                if (info.isNetworkBroken()) {
+                if (info.needSwitchServer()) {
                     host = Config.UP_HOST_BACKUP;
                 }
                 httpManager.multipartPost("http://" + host, args, progress, retried);

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

@@ -216,7 +216,7 @@ public void complete(ResponseInfo info, JSONObject response) {
                         return;
                     }
                     String host2 = host;
-                    if (info.isNetworkBroken()) {
+                    if (info.needSwitchServer()) {
                         host2 = Config.UP_HOST_BACKUP;
                     }
                     nextTask(offset, retried + 1, host2);