From e76e1d3ce4bf65b3c7f56e09dd5f51b79538df18 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@ruby-lang.org>
Date: Thu, 28 Oct 2021 17:42:36 +0900
Subject: [PATCH] Downloader: retry when RFC 2616 noncompliant dates [ci skip]

zlib.net rarely returns the current time in RFC 2616 noncompliant
format in the response header, and the checksum does not match in
that case (maybe creating the tarball on the fly?).
---
 tool/downloader.rb | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/tool/downloader.rb b/tool/downloader.rb
index e9ea00c4c4..d3a9f75637 100644
--- a/tool/downloader.rb
+++ b/tool/downloader.rb
@@ -211,9 +211,15 @@ class Downloader
       $stdout.print "downloading #{name} ... "
       $stdout.flush
     end
+    mtime = nil
+    options = options.merge(http_options(file, since.nil? ? true : since))
     begin
       data = with_retry(10) do
-        url.read(options.merge(http_options(file, since.nil? ? true : since)))
+        data = url.read(options)
+        if mtime = data.meta["last-modified"]
+          mtime = Time.httpdate(mtime)
+        end
+        data
       end
     rescue OpenURI::HTTPError => http_error
       if http_error.message =~ /^304 / # 304 Not Modified
@@ -237,16 +243,13 @@ class Downloader
       end
       raise
     end
-    mtime = nil
     dest = (cache_save && cache && !cache.exist? ? cache : file)
     dest.parent.mkpath
     dest.open("wb", 0600) do |f|
       f.write(data)
       f.chmod(mode_for(data))
-      mtime = data.meta["last-modified"]
     end
     if mtime
-      mtime = httpdate(mtime)
       dest.utime(mtime, mtime)
     end
     if $VERBOSE
@@ -328,7 +331,7 @@ class Downloader
     times = 0
     begin
       block.call
-    rescue Errno::ETIMEDOUT, SocketError, OpenURI::HTTPError, Net::ReadTimeout, Net::OpenTimeout => e
+    rescue Errno::ETIMEDOUT, SocketError, OpenURI::HTTPError, Net::ReadTimeout, Net::OpenTimeout, ArgumentError => e
       raise if e.is_a?(OpenURI::HTTPError) && e.message !~ /^50[023] / # retry only 500, 502, 503 for http error
       times += 1
       if times <= max_times