Created
January 6, 2021 12:04
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add forward header for reverse proxy
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map $remote_addr $proxy_forwarded_elem { | |
# IPv4 addresses can be sent as-is | |
~^[0-9.]+$ "for=$remote_addr"; | |
# IPv6 addresses need to be bracketed and quoted | |
~^[0-9A-Fa-f:.]+$ "for=\"[$remote_addr]\""; | |
# Unix domain socket names cannot be represented in RFC 7239 syntax | |
default "for=unknown"; | |
} | |
map $http_forwarded $proxy_add_forwarded { | |
# If the incoming Forwarded header is syntactically valid, append to it | |
"~^(,[ \\t]*)*([!#$%&'*+.^_`|~0-9A-Za-z-]+=([!#$%&'*+.^_`|~0-9A-Za-z-]+|\"([\\t \\x21\\x23-\\x5B\\x5D-\\x7E\\x80-\\xFF]|\\\\[\\t \\x21-\\x7E\\x80-\\xFF])*\"))?(;([!#$%&'*+.^_`|~0-9A-Za-z-]+=([!#$%&'*+.^_`|~0-9A-Za-z-]+|\"([\\t \\x21\\x23-\\x5B\\x5D-\\x7E\\x80-\\xFF]|\\\\[\\t \\x21-\\x7E\\x80-\\xFF])*\"))?)*([ \\t]*,([ \\t]*([!#$%&'*+.^_`|~0-9A-Za-z-]+=([!#$%&'*+.^_`|~0-9A-Za-z-]+|\"([\\t \\x21\\x23-\\x5B\\x5D-\\x7E\\x80-\\xFF]|\\\\[\\t \\x21-\\x7E\\x80-\\xFF])*\"))?(;([!#$%&'*+.^_`|~0-9A-Za-z-]+=([!#$%&'*+.^_`|~0-9A-Za-z-]+|\"([\\t \\x21\\x23-\\x5B\\x5D-\\x7E\\x80-\\xFF]|\\\\[\\t \\x21-\\x7E\\x80-\\xFF])*\"))?)*)?)*$" "$http_forwarded, $proxy_forwarded_elem"; | |
# Otherwise, replace it | |
default "$proxy_forwarded_elem"; | |
} |
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