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网络软件一般是指系统的网络操作系统、网络通信协议和应用级的提供网络服务功能的专用软件。网络软件包括通信支撑平台软件、网络服务支撑平台软件、网络应用支撑平台软件、网络应用系统、网络管理系统以及用于特殊网络站点的软件等。从网络体系结构模型不难看出，通信软件和各层网络协议软件是这些网络软件的基础和主体。 HTTrack Website Copier是一个免费并易于使用的线下浏览器工具 ，它能够让你从互联网上下载整个网站进行线下浏览。浏览线下站点和线上并没有什么不同。HTTrack同样可以进行线下线上站点同步，支持断点续传。HTTrack是一个可全面配置并包括全面的帮助系统的工具 + New: support for IDNA / RFC 3492 (punycode) handling
+ New: openssl is no longer dynamically probed at stratup, but dynamically linked
+ Fixed: random closing of files/sockets, leading to "zip_zipWriteInFileInZip_failed" a> ssertion, "bogus state" messages, or random garbage in downloaded files
+ Fixed: libssl.dylib is now in the search list for libssl on OSS (Nils Breunese)
+ Fixed: bogus charset because the meta httpequiv tag is placed too far in the html page
+ Fixed: incorrect \\machine\dir structure build on Windows (TomZ)
+ Fixed: do not force a file to have an extension unless it has a known type (such as html), or a possibly known type (if delayed checks are disabled)
+ Fixed: HTML 5 addition regarding "poster" attribute for the "video" tag (Jason Ronallo)
+ Fixed: memory leaks in proxytrack.c (Eric Searcy)
+ Fixed: correctly set the Z flag in htscache/new.txt file (Peter)
+ Fixed: parallel patch, typo regarding ICONV_LIBS (Sebastian Pipping)
+ Fixed: memory leak in hashtable, that may lead to excessive memory consumption
+ Fixed: on Windows, fixed possible DLL local injection (CVE20105252)
+ Fixed: UTF8 conversion bug on Linux that may lead to buggy filenames
+ Fixed: zerolength files not being properly handled (not saved on disk, not updated) (lugusto)
+ Fixed: serious bug that may lead to download several times the same file, and "Unexpected 412/416 error" errors
+ Fixed: images in CSS were sometimes not correctly detected (Martin)
+ Fixed: links within javas cript events were sometimes not correctly detected (wquatan)
+ Fixed: webhttrack caused bus error on certain systems, such as Mac OSS, due to the stack size (Patrick Gundlach)
+ Fixed: bogus charset for requests when filenames have nonascii characters (Steven Hsiao)
+ Fixed: bogus charset on disk when filenames have nonascii characters (Steven Hsiao)
+ Fixed: fixed 260characters path limit for Windows (lugusto)
常见的网络操作系统有UNIX、Netware、Windows NT、Linux等,网络软件的漏洞及缺陷被利用，使网络遭到入侵和破坏。
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