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/t/lib/pubsub.lua

@@ -0,0 +1,128 @@
+--
+-- 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 ws_client = require "resty.websocket.client"
+local protoc    = require("protoc")
+local pb        = require("pb")
+
+local _M = {}
+local mt = { __index = _M }
+
+
+local pb_state
+local function load_proto()
+    pb.state(nil)
+    protoc.reload()
+    pb.option("int64_as_string")
+    local pubsub_protoc = protoc.new()
+    pubsub_protoc:addpath("apisix/include/apisix/model")
+    local ok, err = pcall(pubsub_protoc.loadfile, pubsub_protoc, "pubsub.proto")
+    if not ok then
+        ngx.log(ngx.ERR, "failed to load protocol: "..err)
+        return err
+    end
+    pb_state = pb.state(nil)
+end
+
+
+local function init_websocket_client(endpoint)
+    local ws, err = ws_client:new()
+    if not ws then
+        ngx.log(ngx.ERR, "failed to create websocket client: "..err)
+        return nil, err
+    end
+    local ok, err = ws:connect(endpoint)
+    if not ok then
+        ngx.log(ngx.ERR, "failed to connect: "..err)
+        return nil, err
+    end
+    return ws
+end
+
+
+function _M.new_ws(server)
+    local err = load_proto()
+    if err then
+        return nil, err
+    end
+    local ws, err = init_websocket_client(server)
+    if not ws then
+        return nil, err
+    end
+
+    local obj = setmetatable({
+        type = "ws",
+        ws_client = ws,
+    }, mt)
+
+    return obj
+end
+
+
+function _M.send_recv_ws_binary(self, data, is_raw)
+    pb.state(pb_state)
+    local ws = self.ws_client
+    if not is_raw then
+        data = pb.encode("PubSubReq", data)
+    end
+    local _, err = ws:send_binary(data)
+    if err then
+        return nil, err
+    end
+    local raw_data, _, err = ws:recv_frame()
+    if not raw_data then
+        ngx.log(ngx.ERR, "failed to receive the frame: ", err)
+        return nil, err
+    end
+    local data, err = pb.decode("PubSubResp", raw_data)
+    if not data then
+        ngx.log(ngx.ERR, "failed to decode the frame: ", err)
+        return nil, err
+    end
+
+    return data
+end
+
+
+function _M.send_recv_ws_text(self, text)
+    pb.state(pb_state)
+    local ws = self.ws_client
+    local _, err = ws:send_text(text)
+    if err then
+        return nil, err
+    end
+    local raw_data, _, err = ws:recv_frame()
+    if not raw_data then
+        ngx.log(ngx.ERR, "failed to receive the frame: ", err)
+        return nil, err
+    end
+    local data, err = pb.decode("PubSubResp", raw_data)
+    if not data then
+        ngx.log(ngx.ERR, "failed to decode the frame: ", err)
+        return nil, err
+    end
+
+    return data
+end
+
+
+function _M.close_ws(self)
+    self.ws_client:send_close()
+end
+
+
+return _M