摘要:
MySQL Server 5.6\bin 第二步:执行mysql/bin目录的mysqldump备份数据库 命令:mysqldump -h127.0.0.1 -u**** -p --default-character-set=utf8 test >D:\Test.sql 命令解析: --defaul 阅读全文
摘要:
JSON_CONTAINS(CategoryIdSet,"172") [123,17,2] N [172,12] Y [172,12] Y SELECT name, profile->"$.twitter" AS `twitter` FROM `user` WHERE profile->"$.twi 阅读全文
摘要:
w http://stackoverflow.com/questions/14069421/show-an-image-preview-before-upload https://developer.mozilla.org/en-US/docs/Web/API/FileReader/readAsDa 阅读全文
摘要:
w恶意者利用。 http://php.net/manual/en/function.eval.php https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/eval The eval() fu 阅读全文
摘要:
客户端实现连接的唯一性 HTTP The Definitive Guide 4.2.7 TIME_WAIT Accumulation and Port Exhaustion TIME_WAIT port exhaustion is a serious performance problem that 阅读全文
摘要:
w非全尺寸分组的发送条件 HTTP The Definitive Guide TCP has a data stream interface that permits applications to stream data of any size to the TCP stack—even a si 阅读全文
摘要:
w防止网络过载和拥塞 HTTP The Definitive Guide The performance of TCP data transfer also depends on the age of the TCP connection. TCP connections "tune" themse 阅读全文
摘要:
wTCP本身已经确保传输的成功性。 HTTP The Definitive Guide 4.2.4 Delayed Acknowledgments Because the Internet itself does not guarantee reliable packet delivery (Int 阅读全文
摘要:
wHTTP重用现存连接来减少TCP建立时延。 HTTP The Definitive Guide 4.2.3 TCP Connection Handshake Delays When you set up a new TCP connection, even before you send any 阅读全文
摘要:
w客户端、服务器超载 HTTP The Definitive Guide 与建立TCP连接以及传输请求和相应报文的时间相比,事务处理的时间是很短的。除非客户端或服务器超载或正在处理复杂的动态资源,否则HTTP时延主要就是由TCP网络时延构成的。 Notice that the transaction 阅读全文
摘要:
wTCP客户端和服务器是如何通过TCP套接字接口进行通讯的。服务器距离、负载,网络拥堵。 HTTP The Definitive Guide We begin with the web server waiting for a connection (Figure 4-6, S4). The cli 阅读全文
摘要:
4个值唯一地定义一条TCP连接。 HTTP The Definitive Guide A computer might have several TCP connections open at any one time. TCP keeps all these connections straigh 阅读全文
摘要:
小结: 1、HTTPS存在不同于HTTP的默认端口及一个加密/身份验证层(在HTTP与TCP之间) HTTPS(全称:Hyper Text Transfer Protocol over Secure Socket Layer 或 Hypertext Transfer Protocol Secure, 阅读全文
摘要:
0000-FFFF 最多四字节。 https://en.wikipedia.org/wiki/UTF-8 UTF-8 encodes each of the 1,112,064 valid code points in the Unicode code space (1,114,112 code p 阅读全文
摘要:
w结构化文件的展示。 https://www.w3.org/TR/2016/CR-css-flexbox-1-20160526/ CSS is a language for describing the rendering of structured documents (such as HTML 阅读全文
摘要:
解析外部xml给本地带来的安全隐患。 https://en.wikipedia.org/wiki/XML_external_entity_attack An XML External Entity (XXE) attack[1][2] is a type of computer security v 阅读全文
摘要:
避免加载外部实体字符。 http://php.net/manual/en/function.libxml-disable-entity-loader.php libxml_disable_entity_loader — Disable the ability to load external ent 阅读全文