spacewander commented on a change in pull request #6512:
URL: https://github.com/apache/apisix/pull/6512#discussion_r822235568
##########
File path: apisix/plugins/recaptcha.lua
##########
@@ -0,0 +1,122 @@
+local radix = require("resty.radixtree")
+local core = require("apisix.core")
+local http = require("resty.http")
+
+local schema = {
+ type = "object",
+ properties = {
+ recaptcha_secret_key = { type = "string" },
+ apis = {
+ type = "array",
+ items = {
+ type = "object",
+ properties = {
+ path = { type = "string" },
+ methods = { type = "array", items = { type = "string" },
minItems = 1 },
+ param_from = { type = "string", default = "header", enum =
{ "header", "query" } },
+ param_name = { type = "string", default = "captcha" },
+ }
+ },
+ minItems = 1
+ },
+ response = {
+ type = "object",
+ properties = {
+ content_type = { type = "string", default = "application/json;
charset=utf-8" },
+ status_code = { type = "number", default = 400 },
+ body = { type = "string", default = '{"message": "invalid
captcha"}' }
+ }
+ },
+
+ },
+ additionalProperties = false,
+ required = { "recaptcha_secret_key" },
+}
+
+local recaptcha_url = "https://www.recaptcha.net";
+
+local _M = {
+ version = 0.1,
+ priority = 700,
+ name = "recaptcha",
+ schema = schema,
+}
+
+function _M.check_schema(conf, schema_type)
+ return core.schema.check(schema, conf)
+end
+
+local function build_radixtree(apis)
+ local items = {}
+ for _, api in ipairs(apis) do
+ local item = {
+ paths = { api.path },
+ methods = api.methods,
+ metadata = api,
+ }
+ table.insert(items, item)
+ end
+ return radix.new(items)
+end
+
+local function find_api(request, apis)
+ local rx = build_radixtree(apis)
+ return rx:match(request.path, { method = request.method })
+end
Review comment:
I prefer to add an expression from lua-resty-expr to filter out the
requests that need to be reCAPTCHA, instead of using a mini router matcher
(which is an anti-pattern).
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