local os = require 'os'
local upload = require 'resty.upload'

get_os_type

local function get_os_type()
    local os_type = 'unknown'
    if package.config:sub(1,1) == '\\' then
        os_type = 'windows'
    elseif package.config:sub(1,1) == '/' then
        os_type = 'unix'
    end
    return os_type
end

is_windows

local function is_windows()
    if get_os_type() == 'windows' then
        return true
    end
    return false
end

get_file_name

local function get_file_name(response)
    local _file_name = ngx.re.match(response, '(.+)filename="(.+)"(.*)')
    if _file_name then 
        return _file_name[2]
    end
end

get_timestamp

local function get_timestamp_ss()
    local _timestamp = string.format('%d', os.time())
    return _timestamp
end
local function get_timestamp_sss()
    local _timestamp = string.format('%.3f', ngx.now())
    return _timestamp
end
local function get_timestamp_linux()
    local _pipe = io.popen('linux_date "+%s%3N"')
    local _timestamp = _pipe:read("*a")
    _pipe:close()
    _timestamp = _timestamp:gsub('\r\n$', '')
    _timestamp = _timestamp:gsub('\n$', '')
    return _timestamp
end
local function get_timestamp()
    return get_timestamp_sss()
end

get_file_path

local function assert_path_file(filePath)
    local _file_path = filePath
    if (is_windows()) then
        _file_path = string.gsub(_file_path, '/', '\\')
    end
    _status = os.execute('if not exist ' .. _file_path .. ' mkdir ' .. _file_path)
end
local function get_file_ext(fileName)
    local _file_ext = string.match(fileName, '(%.[^.]+)$')
    return _file_ext
end
local function write_txt_file(filePath, context)
    local _txt_file = nil
    _txt_file = io.open(filePath, 'w+')
    if _txt_file then
        _txt_file:write(context)
        _txt_file:close()
    end
    _txt_file = nil
end
local function get_file_path(uploadFile)
    local _status = false
    local _file_path = ngx.var.client_upload_dir
    local timestamp = os.time()

    assert_path_file(_file_path)

    local dateTable = os.date('*t', timestamp)

    _file_path = string.format('%s/%s', _file_path, string.format('%04d', dateTable.year))
    assert_path_file(_file_path)

    _file_path = string.format('%s/%s', _file_path, string.format('%02d', dateTable.month))
    assert_path_file(_file_path)

    _file_path = string.format('%s/%s', _file_path, string.format('%02d', dateTable.day))
    assert_path_file(_file_path)

    _file_path = string.format('%s/%s', _file_path, string.format('%02d', dateTable.hour))
    assert_path_file(_file_path)

    _file_path = string.format('%s/%s', _file_path, uploadFile)
    if (is_windows()) then
        _file_path = string.gsub(_file_path, '/', '\\')
    end

    return _file_path
end

main

local i = 0
while true do
    local form_type, form_response, form_error = form:read()
    if not form_type then
        message = string.format('{"code":1,"msg":"%s%s"}', 'failed to read: ', form_error)
        ngx.say(message)
        return
    end
    if form_type == 'header' then
        if form_response[1] ~= 'Content-Type' then
            upload_file = get_file_name(form_response[2])

            file_name = upload_file
            if file_name then
                file_name = string.format('%s.%d%s', get_timestamp(), i, get_file_ext(upload_file))
                file_path = get_file_path(file_name)

                upload_table[i] = file_name
                i = i + 1

                file = io.open(file_path, 'wb+')
                if not file then
                    message = string.format('{"code":1,"msg":"%s"}', 'Failed to open file')
                    ngx.say(message)
                    return
                end
            else
            end
        end
    elseif form_type == 'body' then
        if file then
            file_length = file_length + tonumber(string.len(form_response))    
            file:write(form_response)
        else
        end
    elseif form_type == 'part_end' then
        if file then
            file:close()
            file = nil

            local _upload_dir_length = string.len(ngx.var.client_upload_dir) + 1
            _file_path = '/upload' .. string.sub(file_path, _upload_dir_length)
            if (is_windows()) then
                _file_path = string.gsub(_file_path, '\\', '/')
            end

            write_txt_file(file_path .. '.txt', upload_file)

            upload_line = upload_line .. string.format('{"source":"%s","path":"%s"}', upload_file, _file_path) .. ','

        end
    elseif form_type == 'eof' then
        upload_line = '[' .. upload_line .. ']'
        upload_line = string.gsub(upload_line, ',]', ']')

        message = string.format('{"code":0,"msg":"%s","data":%s}', 'success', upload_line)
        ngx.say(message)
        break
    else
    end
end
if (i == 0) then
    message = string.format('{"code":1,"msg":"%s"}', 'Please upload at least one file!')
    ngx.say(message)
    return
end

conf

location /api/sys/now {
    content_by_lua_block {
		ngx.header.content_type = 'text/html; charset=utf-8'
	    local result = string.format('{"code":0,"msg":"success","data":{"timestamp":"%s","now":"%s"}}', string.format('%.3f', ngx.now()), os.date("%Y-%m-%d %H:%M:%S"))
		ngx.say(result)
    }
}

D:\msys64\home\unix2linux\lua2>curl "http://localhost:9999/api/sys/now" -s | jq
{
	"code": 0,
	"msg": "success",
	"data": {
		"timestamp": "1732241439.300",
		"now": "2024-11-22 10:10:39"
	}
}

demo

D:\msys64\home\unix2linux\lua2>curl -X POST -F"[email protected]" "http://localhost:9999/api/file/upload" -s | jq
{
  "code": 0,
  "msg": "success",
  "data": [
    {
      "source": "lua.png",
      "path": "/upload/2024/11/25/15/1732519677.943.0.png"
    }
  ]
}

/api/dir/list