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-rw-r--r--lib/spack/spack/fetch_strategy.py3
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/spack/spack/fetch_strategy.py b/lib/spack/spack/fetch_strategy.py
index 30e6823207..f1f787f4c7 100644
--- a/lib/spack/spack/fetch_strategy.py
+++ b/lib/spack/spack/fetch_strategy.py
@@ -276,7 +276,8 @@ class URLFetchStrategy(FetchStrategy):
# Check if we somehow got an HTML file rather than the archive we
# asked for. We only look at the last content type, to handle
# redirects properly.
- content_types = re.findall(r'Content-Type:[^\r\n]+', headers)
+ content_types = re.findall(r'Content-Type:[^\r\n]+', headers,
+ flags=re.IGNORECASE)
if content_types and 'text/html' in content_types[-1]:
tty.warn("The contents of ",
(self.archive_file if self.archive_file is not None