Detect fetching folders/trees to avoid unnecessary auth #122
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The authentication step is only needed when actually fetching raw github resources that potentially exist. But raw URLs pointing to `/tree/` will always fail by definition (can't get the raw content of a folder). Since the raw handler overwrites the request URI, we preserve the original URI as the Referrer, so it can be checked by other handlers.
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The authentication step is only needed when actually fetching raw github resources that potentially exist. But raw URLs pointing to
/tree/will always fail by definition (can't get the raw content of a folder).Since the raw handler overwrites the request URI, we preserve the original URI as the Referrer, so it can be checked by other handlers.