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location optional_modifier location_match {
. . .
}
=: If an equal sign is used, this block will be considered a match if the request URI exactly matches the location given.~: If a tilde modifier is present, this location will be interpreted as a case-sensitive regular expression match.~*: If a tilde and asterisk modifier is used, the location block will be interpreted as a case-insensitive regular expression match.^~: If a carat and tilde modifier is present, and if this block is selected as the best non-regular expression match, regular expression matching will not take place.