From: Sergey M․ <dstftw@gmail.com>
Date: Tue, 5 May 2020 13:01:25 +0000 (+0700)
Subject: [downloader/http] Finish downloading once received data length matches expected
X-Git-Url: http://git.bitcoin.ninja/index.cgi?p=youtube-dl;a=commitdiff_plain;h=f7b42518dc4c10d6027bfe7f5e7f186d526b1a4b

[downloader/http] Finish downloading once received data length matches expected

Always do this if possible, i.e. if Content-Length or expected length is known, not only in test.
This will save unnecessary last extra loop trying to read 0 bytes.
---

diff --git a/youtube_dl/downloader/http.py b/youtube_dl/downloader/http.py
index 3c72ea18b..970103a8d 100644
--- a/youtube_dl/downloader/http.py
+++ b/youtube_dl/downloader/http.py
@@ -299,7 +299,7 @@ class HttpFD(FileDownloader):
                     'elapsed': now - ctx.start_time,
                 })
 
-                if is_test and byte_counter == data_len:
+                if data_len is not None and byte_counter == data_len:
                     break
 
             if not is_test and ctx.chunk_size and ctx.data_len is not None and byte_counter < ctx.data_len: