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/stream/xrpc.lua

@@ -0,0 +1,121 @@
+--
+-- 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 require = require
+local core = require("apisix.core")
+local metrics = require("apisix.stream.xrpc.metrics")
+local ipairs = ipairs
+local pairs = pairs
+local ngx_exit = ngx.exit
+
+
+local is_http = true
+local runner
+if ngx.config.subsystem ~= "http" then
+    is_http = false
+    runner = require("apisix.stream.xrpc.runner")
+end
+
+local _M = {}
+local registered_protocols = {}
+local registered_protocol_schemas = {}
+
+
+-- only need to load schema module when it is used in Admin API
+local function register_protocol(name, is_http)
+    if not is_http then
+        registered_protocols[name] = require("apisix.stream.xrpc.protocols." .. name)
+    end
+
+    registered_protocol_schemas[name] =
+        require("apisix.stream.xrpc.protocols." .. name .. ".schema")
+end
+
+
+function _M.init()
+    local local_conf = core.config.local_conf()
+    if not local_conf.xrpc then
+        return
+    end
+
+    local prot_conf = local_conf.xrpc.protocols
+    if not prot_conf then
+        return
+    end
+
+    if is_http and not local_conf.apisix.enable_admin then
+        -- we need to register xRPC protocols in HTTP only when Admin API is enabled
+        return
+    end
+
+    for _, prot in ipairs(prot_conf) do
+        core.log.info("register xprc protocol ", prot.name)
+        register_protocol(prot.name, is_http)
+    end
+end
+
+
+function _M.init_metrics(collector)
+    local local_conf = core.config.local_conf()
+    if not local_conf.xrpc then
+        return
+    end
+
+    local prot_conf = local_conf.xrpc.protocols
+    if not prot_conf then
+        return
+    end
+
+    for _, prot in ipairs(prot_conf) do
+        metrics.store(collector, prot.name)
+    end
+end
+
+
+function _M.init_worker()
+    for name, prot in pairs(registered_protocols) do
+        if not is_http and prot.init_worker then
+            prot.init_worker()
+        end
+    end
+end
+
+
+function _M.check_schema(item, skip_disabled_plugin)
+    local name = item.name
+    local protocol = registered_protocol_schemas[name]
+    if not protocol and not skip_disabled_plugin then
+        -- like plugins, ignore unknown plugin if the schema is checked in the DP
+        return false, "unknown protocol [" .. name .. "]"
+    end
+
+    -- check protocol-specific configuration
+    if not item.conf then
+        return true
+    end
+    return protocol.check_schema(item.conf)
+end
+
+
+function _M.run_protocol(conf, ctx)
+    local name = conf.name
+    local protocol = registered_protocols[name]
+    local code = runner.run(protocol, ctx)
+    return ngx_exit(code)
+end
+
+
+return _M