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/content-decode.lua

@@ -0,0 +1,112 @@
+--
+-- 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 pcall = pcall
+local zlib = require("ffi-zlib")
+local str_buffer = require("string.buffer")
+local is_br_libs_loaded, brotli = pcall(require, "brotli")
+local content_decode_funcs = {}
+local _M = {}
+
+
+local function inflate_gzip(data)
+    local inputs = str_buffer.new():set(data)
+    local outputs = str_buffer.new()
+
+    local read_inputs = function(size)
+        local data = inputs:get(size)
+        if data == "" then
+            return nil
+        end
+        return data
+    end
+
+    local write_outputs = function(data)
+        return outputs:put(data)
+    end
+
+    local ok, err = zlib.inflateGzip(read_inputs, write_outputs)
+    if not ok then
+        return nil, "inflate gzip err: " .. err
+    end
+
+    return outputs:get()
+end
+content_decode_funcs.gzip = inflate_gzip
+
+
+local function brotli_stream_decode(read_inputs, write_outputs)
+    -- read 64k data per times
+    local read_size = 64 * 1024
+    local decompressor = brotli.decompressor:new()
+
+    local chunk, ok, res
+    repeat
+        chunk = read_inputs(read_size)
+        if chunk then
+            ok, res = pcall(function()
+                return decompressor:decompress(chunk)
+            end)
+        else
+            ok, res = pcall(function()
+                return decompressor:finish()
+            end)
+        end
+        if not ok then
+            return false, res
+        end
+        write_outputs(res)
+    until not chunk
+
+    return true, nil
+end
+
+
+local function brotli_decode(data)
+    local inputs = str_buffer.new():set(data)
+    local outputs = str_buffer.new()
+
+    local read_inputs = function(size)
+        local data = inputs:get(size)
+        if data == "" then
+            return nil
+        end
+        return data
+    end
+
+    local write_outputs = function(data)
+        return outputs:put(data)
+    end
+
+    local ok, err = brotli_stream_decode(read_inputs, write_outputs)
+    if not ok then
+        return nil, "brotli decode err: " .. err
+    end
+
+    return outputs:get()
+end
+
+if is_br_libs_loaded then
+    content_decode_funcs.br = brotli_decode
+end
+
+
+function _M.dispatch_decoder(response_encoding)
+    return content_decode_funcs[response_encoding]
+end
+
+
+return _M