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Nginx human user recognition
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| server { | |
| listen 80; | |
| server_name example.com; | |
| encrypted_session_key 'v1-clG~!~v7B_Z0yu.:iw*Rj#l-Nc8E^'; | |
| encrypted_session_iv "themiddlerfvbgt5"; | |
| encrypted_session_expires 20; | |
| location ~ /botbuster.js { | |
| default_type 'text/javascript'; | |
| set_decode_base32 $enctoken $arg_t; | |
| set_decrypt_session $plaintoken $enctoken; | |
| set_encrypt_session $token "ts=$time_iso8601, src=$remote_addr, ua=$http_user_agent"; | |
| set_encode_base32 $token; | |
| content_by_lua_block { | |
| ts, src, ua = string.match(ngx.var.plaintoken, "ts.(.+). src.(.+). ua.(.+)") | |
| local pass = 0 | |
| if src == ngx.var.remote_addr then | |
| if ua == ngx.var.http_user_agent then | |
| pass = 1 | |
| end | |
| end | |
| if pass == 1 then | |
| ngx.say(" document.cookie = 'iamhuman=" .. ngx.var.token .. "'; ") | |
| else | |
| ngx.say(" console.log('Error: invalid token or session expired'); ") | |
| end | |
| } | |
| } | |
| location / { | |
| default_type 'text/html'; | |
| set $allowreq 0; | |
| set_decode_base32 $enciamhuman $cookie_iamhuman; | |
| set_decrypt_session $plainiamhuman $enciamhuman; | |
| set_by_lua_block $allowreq { | |
| if ngx.var.cookie_iamhuman then | |
| ts, src, ua = string.match(ngx.var.plainiamhuman, "ts.(.+). src.(.+). ua.(.+)") | |
| if src == ngx.var.remote_addr then | |
| if ua == ngx.var.http_user_agent then | |
| return 1 | |
| end | |
| end | |
| end | |
| return 0 | |
| } | |
| if ($allowreq = 1) { | |
| proxy_pass http://127.0.0.1:8888; | |
| } | |
| if ($allowreq = 0) { | |
| set_encrypt_session $token "ts=$time_iso8601, src=$remote_addr, ua=$http_user_agent"; | |
| set_encode_base32 $token; | |
| content_by_lua_block { | |
| ngx.print('<html><head><script type=\'text/javascript\'>(function() { var as = document.createElement(\'script\'); as.type = \'text/javascript\'; as.async = true; as.src = \'/botbuster.js?t=' .. ngx.var.token .. '\'; var s = document.getElementsByTagName(\'script\')[0];s.parentNode.insertBefore(as, s); })();</script></head><body>checking if you are a human...<script> console.log("uhm"); setTimeout(function() { location.reload(); }, 1000); </script></body></html>') | |
| ngx.exit(ngx.HTTP_OK) | |
| } | |
| } | |
| } |
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