nginx_upload.conf

pid        logs/nginx_upload.pid;
events {
    worker_connections  1024;
}

http {
    lua_package_path '/usr/local/lib/lua/5.1/?.lua;/blah/?.lua;;';

    server {
        listen       8001;

        # download
        autoindex on;
        autoindex_exact_size off;
        autoindex_localtime on;

        # auth
        auth_basic "Restricted site";
        auth_basic_user_file /opt/nginx/.htpasswd;

        location /download {
            alias upload;
        }


        location ~ ^/upload_lua(/.*)?$ {
            set $store_path upload$1/;
            content_by_lua_block {
                local upload = require "resty.upload"
                
                local function my_get_file_name(header)
                    local file_name
                    for i, ele in ipairs(header) do
                        file_name = string.match(ele, 'filename="(.*)"')
                        if file_name and file_name ~= '' then
                            return file_name
                        end
                    end
                    return nil
                end

                local chunk_size = 4096
                local form = upload:new(chunk_size)
                local file
                local file_path
                while true do
                    local typ, res, err = form:read()

                    if not typ then
                         ngx.say("failed to read: ", err)
                         return
                    end

                    if typ == "header" then
                        local file_name = my_get_file_name(res)
                        if file_name then
                            file_path = ngx.var.store_path..file_name
                            file = io.open(file_path, "w+")
                            if not file then
                                ngx.say("failed to open file ", file_path)
                                return
                            end
                        end

                    elseif typ == "body" then
                        if file then
                            file:write(res)
                        end

                    elseif typ == "part_end" then
                        if file then
                            file:close()
                            file = nil
                            ngx.say("upload to "..file_path.." successfully!")
                        end
                    elseif typ == "eof" then
                        break

                    else
                        -- do nothing
                    end
                end

            }
        }

        location ~ ^/delete/(.*)$ {
            set $file_path upload/$1;
            content_by_lua_block {
                local function file_exists(path)
                  local file = io.open(path, "rb")
                  if file then file:close() end
                  return file ~= nil
                end
                if not file_exists(ngx.var.file_path) then
                    ngx.say("file not found: "..ngx.var.file_path)
                end
                r, err = os.remove(ngx.var.file_path)
                if not r then
                    ngx.say("failed to delete: "..err)
                else
                    ngx.say("delete successfully!")
                end
            }
        }
    }
}