Set a default HTTP client for DefaultFetcher in DownloadFile method if none is set #686
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If someone instantiates a new DefaultFetcher directly with
DefaultFetcher{}
instead of with the new constructor ,DownloadFile
will fail because theclient
field has not been set. This pull request updatesDownloadFile
to check if theclient
field isnil
and sets a default HTTP client if it is to avoid breaking current usage ofDefaultFetcher
.