From b6e542a3df19d973ee6a406c67fac1dd8b5b5947 Mon Sep 17 00:00:00 2001
From: singh-pratyush96 <singh.pratyush96@gmail.com>
Date: Mon, 25 Jul 2016 01:51:52 +0530
Subject: [PATCH] Added random sleep for given interval range. Fixes #9930

---
 youtube_dl/YoutubeDL.py         |  1 +
 youtube_dl/__init__.py          |  1 +
 youtube_dl/downloader/common.py | 13 +++++++++++--
 youtube_dl/options.py           |  5 +++++
 4 files changed, 18 insertions(+), 2 deletions(-)

diff --git a/youtube_dl/YoutubeDL.py b/youtube_dl/YoutubeDL.py
index 6551f086f..10dc86038 100755
--- a/youtube_dl/YoutubeDL.py
+++ b/youtube_dl/YoutubeDL.py
@@ -250,6 +250,7 @@ class YoutubeDL(object):
     call_home:         Boolean, true iff we are allowed to contact the
                        youtube-dl servers for debugging.
     sleep_interval:    Number of seconds to sleep before each download.
+    max_sleep_interval:Upper bound of number of seconds for random sleep.
     listformats:       Print an overview of available video formats and exit.
     list_thumbnails:   Print a table of all thumbnails and exit.
     match_filter:      A function that gets called with the info_dict of
diff --git a/youtube_dl/__init__.py b/youtube_dl/__init__.py
index 2b34bf9c2..309f156da 100644
--- a/youtube_dl/__init__.py
+++ b/youtube_dl/__init__.py
@@ -370,6 +370,7 @@ def _real_main(argv=None):
         'source_address': opts.source_address,
         'call_home': opts.call_home,
         'sleep_interval': opts.sleep_interval,
+        'max_sleep_interval': opts.max_sleep_interval,
         'external_downloader': opts.external_downloader,
         'list_thumbnails': opts.list_thumbnails,
         'playlist_items': opts.playlist_items,
diff --git a/youtube_dl/downloader/common.py b/youtube_dl/downloader/common.py
index 1dba9f49a..075c425be 100644
--- a/youtube_dl/downloader/common.py
+++ b/youtube_dl/downloader/common.py
@@ -4,6 +4,7 @@ import os
 import re
 import sys
 import time
+import random
 
 from ..compat import compat_os_name
 from ..utils import (
@@ -344,8 +345,16 @@ class FileDownloader(object):
 
         sleep_interval = self.params.get('sleep_interval')
         if sleep_interval:
-            self.to_screen('[download] Sleeping %s seconds...' % sleep_interval)
-            time.sleep(sleep_interval)
+            min_sleep_interval = sleep_interval
+            max_sleep_interval = self.params.get('max_sleep_interval') or min_sleep_interval
+
+            sleep_time = random.uniform(
+                min_sleep_interval,
+                max_sleep_interval
+            )
+
+            self.to_screen('[download] Sleeping %s seconds...' % sleep_time)
+            time.sleep(sleep_time)
 
         return self.real_download(filename, info_dict)
 
diff --git a/youtube_dl/options.py b/youtube_dl/options.py
index c4a85b2c0..8c6207219 100644
--- a/youtube_dl/options.py
+++ b/youtube_dl/options.py
@@ -491,6 +491,11 @@ def parseOpts(overrideArguments=None):
         '--sleep-interval', metavar='SECONDS',
         dest='sleep_interval', type=float,
         help='Number of seconds to sleep before each download.')
+    workarounds.add_option(
+        '--max-sleep-interval', metavar='SECONDS',
+        dest='max_sleep_interval', type=float,
+        help='Maximum sleep time for random sleep.'
+    )
 
     verbosity = optparse.OptionGroup(parser, 'Verbosity / Simulation Options')
     verbosity.add_option(