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socket网络编程中read与recv区别 - C/C++ - 清泛网 - 专注C/C++及内核技术

...使是采用recv + WAITALL 参数还是要考虑是否需要循环读取的问题,在实验中对于多数情况下recv (使用了MSG_WAITALL)还是可以读完buff_size,所以相应的性能会比直接read 进行循环读要好一些。 2、read 与 recv函数调用 read(sockfd, ...
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HTTPKeepAlive,开启还是关闭 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...对服务端不得不维持大量的连接。开启还是关闭,这是个问题。 一个经常用来讲解HTTPKeepAlive的例子一般是这样描述的:当我们访问一个包含了若干个图片的网页时,如果HTTPKeepAlive是关闭的,那么页面中每一个图片都会发起一...
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App Inventor 2 实现导出Excel全方案总结 · App Inventor 2 中文网

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App Inventor 2 OCR 图片文字识别全方案总结 · App Inventor 2 中文网

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App Inventor 2 TableView 拓展:TableView 拓展:数据表格视图,表格展示...

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App Inventor 2 TextboxUtil 扩展:消除输入框焦点(光标) · App Inventor 2 中文网

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App Inventor 2 SliderVertical 扩展:垂直的滑动条 · App Inventor 2 中文网

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What does Redis do when it runs out of memory?

...ation ground to a halt (writes not possible, reads were possible), running PHP scripts stopped dead in their tracks mid-way and had to be kill -9'd manually (even after memory was made available). I assumed data loss (or data inconsistency) had occurred so I did a flushdb and restored from backups....
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Check if passed argument is file or directory in Bash

...sdas: cannot open `ldasdas' (No such file or directory)) $ ./f.bash evil.php FILE FOUND (evil.php: PHP script, ASCII text) FYI: the answers above work but you can use -s to help in weird situations by checking for a valid file first: #!/bin/bash check_file(){ local file="${1}" [[ -s ...
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.htaccess redirect all pages to new domain

...eRule ^/(.*)$ https://YOURDOMAIN.example/$1 [R=301,L] RewriteRule ^index\.php$ - [L] RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule . /index.php [L] </IfModule> share | ...