pb11.5 + pbni + libcurl 调用http、https，实现了get、post(返回文本支持gzip解压，post支持gzip压缩上传)、文件上传、下载（带进度条显示）；提供同步、异步两种操作方式；pb11.5以上版本，可自行升级，应该可以使用，11.5以下版本不支持。(Pb11.5 + pbni + libcurl calls HTTP and HTTPS,realizes get,post (return text supports gzip decompression, post supports gzip compression upload),file upload and download(with progress bar display);provides two operation modes, synchronous and asynchronous;pb11.5 and above can be upgraded by itself, should be able to use; and less than 11.5 does not support.)