46 lines
1.5 KiB
Plaintext
46 lines
1.5 KiB
Plaintext
location = %ANTIBOT_URI% {
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default_type 'text/html';
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if ($request_method = GET) {
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content_by_lua_block {
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local cookie = require "cookie"
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local javascript = require "javascript"
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local logger = require "logger"
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if not cookie.is_set("challenge") then
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logger.log(ngx.WARN, "ANTIBOT", "javascript fail (1) for " .. ngx.var.remote_addr)
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return ngx.exit(ngx.HTTP_FORBIDDEN)
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end
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local challenge = cookie.get("challenge")
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local code = javascript.get_code(challenge, "%ANTIBOT_URI%", cookie.get("uri"))
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ngx.say(code)
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}
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}
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if ($request_method = POST) {
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content_by_lua_block {
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local cookie = require "cookie"
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local javascript = require "javascript"
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local logger = require "logger"
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if not cookie.is_set("challenge") then
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logger.log(ngx.WARN, "ANTIBOT", "javascript fail (2) for " .. ngx.var.remote_addr)
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return ngx.exit(ngx.HTTP_FORBIDDEN)
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end
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ngx.req.read_body()
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local args, err = ngx.req.get_post_args(1)
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if err == "truncated" or not args or not args["challenge"] then
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logger.log(ngx.WARN, "ANTIBOT", "javascript fail (3) for " .. ngx.var.remote_addr)
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return ngx.exit(ngx.HTTP_FORBIDDEN)
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end
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local challenge = args["challenge"]
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local check = javascript.check(cookie.get("challenge"), challenge)
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if not check then
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logger.log(ngx.WARN, "ANTIBOT", "javascript fail (4) for " .. ngx.var.remote_addr)
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return ngx.exit(ngx.HTTP_FORBIDDEN)
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end
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cookie.set({javascript = "ok"})
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return ngx.exit(ngx.OK)
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}
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}
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}
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