feat(apisix): add Cloudron package

- Implements Apache APISIX packaging for Cloudron platform.
- Includes Dockerfile, CloudronManifest.json, and start.sh.
- Configured to use Cloudron's etcd addon.

🤖 Generated with Gemini CLI
Co-Authored-By: Gemini <noreply@google.com>

CloudronPackages/APISIX/apisix-source/apisix/utils/google-cloud-oauth.lua

@@ -0,0 +1,130 @@
+--
+-- Licensed to the Apache Software Foundation (ASF) under one or more
+-- contributor license agreements.  See the NOTICE file distributed with
+-- this work for additional information regarding copyright ownership.
+-- The ASF licenses this file to You under the Apache License, Version 2.0
+-- (the "License"); you may not use this file except in compliance with
+-- the License.  You may obtain a copy of the License at
+--
+--     http://www.apache.org/licenses/LICENSE-2.0
+--
+-- Unless required by applicable law or agreed to in writing, software
+-- distributed under the License is distributed on an "AS IS" BASIS,
+-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+-- See the License for the specific language governing permissions and
+-- limitations under the License.
+--
+
+local core = require("apisix.core")
+local type = type
+local setmetatable = setmetatable
+
+local ngx_update_time = ngx.update_time
+local ngx_time = ngx.time
+local ngx_encode_args = ngx.encode_args
+
+local http = require("resty.http")
+local jwt = require("resty.jwt")
+
+
+local function get_timestamp()
+    ngx_update_time()
+    return ngx_time()
+end
+
+
+local _M = {}
+
+
+function _M.generate_access_token(self)
+    if not self.access_token or get_timestamp() > self.access_token_expire_time - 60 then
+        self:refresh_access_token()
+    end
+    return self.access_token
+end
+
+
+function _M.refresh_access_token(self)
+    local http_new = http.new()
+    local res, err = http_new:request_uri(self.token_uri, {
+        ssl_verify = self.ssl_verify,
+        method = "POST",
+        body = ngx_encode_args({
+            grant_type = "urn:ietf:params:oauth:grant-type:jwt-bearer",
+            assertion = self:generate_jwt_token()
+        }),
+        headers = {
+            ["Content-Type"] = "application/x-www-form-urlencoded",
+        },
+    })
+
+    if not res then
+        core.log.error("failed to refresh google oauth access token, ", err)
+        return
+    end
+
+    if res.status ~= 200 then
+        core.log.error("failed to refresh google oauth access token: ", res.body)
+        return
+    end
+
+    res, err = core.json.decode(res.body)
+    if not res then
+        core.log.error("failed to parse google oauth response data: ", err)
+        return
+    end
+
+    self.access_token = res.access_token
+    self.access_token_type = res.token_type
+    self.access_token_expire_time = get_timestamp() + res.expires_in
+end
+
+
+function _M.generate_jwt_token(self)
+    local payload = core.json.encode({
+        iss = self.client_email,
+        aud = self.token_uri,
+        scope = self.scope,
+        iat = get_timestamp(),
+        exp = get_timestamp() + (60 * 60)
+    })
+
+    local jwt_token = jwt:sign(self.private_key, {
+        header = { alg = "RS256", typ = "JWT" },
+        payload = payload,
+    })
+
+    return jwt_token
+end
+
+
+function _M.new(config, ssl_verify)
+    local oauth = {
+        client_email = config.client_email,
+        private_key = config.private_key,
+        project_id = config.project_id,
+        token_uri = config.token_uri or "https://oauth2.googleapis.com/token",
+        auth_uri = config.auth_uri or "https://accounts.google.com/o/oauth2/auth",
+        entries_uri = config.entries_uri,
+        access_token = nil,
+        access_token_type = nil,
+        access_token_expire_time = 0,
+    }
+
+    oauth.ssl_verify = ssl_verify
+
+    if config.scope then
+        if type(config.scope) == "string" then
+            oauth.scope = config.scope
+        end
+
+        if type(config.scope) == "table" then
+            oauth.scope = core.table.concat(config.scope, " ")
+        end
+    end
+
+    return setmetatable(oauth, { __index = _M })
+end
+
+
+return _M