pcre | 易学教程

nginx入门与实战

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nginx入门与实战网站服务想必我们大多数人都是通过访问网站而开始接触互联网的吧。我们平时访问的网站服务就是 Web 网络服务，一般是指允许用户通过浏览器访问到互联网中各种资源的服务。 Web 网络服务是一种被动访问的服务程序，即只有接收到互联网中其他主机发出的请求后才会响应，最终用于提供服务程序的 Web 服务器会通过 HTTP(超文本传输协议)或 HTTPS(安全超文本传输协议)把请求的内容传送给用户。目前能够提供 Web 网络服务的程序有 IIS、Nginx 和 Apache 等。其中，IIS(Internet Information Services，互联网信息服务)是 Windows 系统中默认的 Web 服务程序 2004 年 10 月 4 日，为俄罗斯知名门户站点而开发的 Web 服务程序 Nginx 横空出世。 Nginx 程序作为一款轻量级的网站服务软件，因其稳定性和丰富的功能而快速占领服务器市场，但 Nginx 最被认可的还当是系统资源消耗低且并发能力强，因此得到了国内诸如新浪、网易、腾讯等门户站的青睐。 web服务器和web框架的关系 web服务器（nginx, apache, lighthttp, IIS）：接收HTTP请求（例如www.pythonav.cn/xiaocang.jpg）并返回数据, web服务器不和数据库打交道 web框架

wget安装nginx

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#下载: wget http: //nginx.org/download/nginx-1.8.0.tar.gz #解压: tar -zxvf nginx-1 .8 .0 .tar .gz #安装依赖插件 yum install -y gcc gcc-c++ ncurses-devel perl pcre pcre-devel zlib gzip zlib-devel #进入目录编译安装 cd nginx-1 .8 .0 ./configure make && make install 来源： https://www.cnblogs.com/waibizi/p/12179625.html

PHP 7 preg_replace PREG_JIT_STACKLIMIT_ERROR with simple string

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问题 I know other people have submitted questions around this error, however I can't see how this regex or the subject string could be any simpler. To me this is a bug, but before submitting it to PHP I thought I'd make sure and get help to see if this can be simpler. Here's a small test script showing 2 strings; one with 1024 x's and one with 1023: // 1024 x's $str = '

Why will this recursive regex only match when a character repeats 2^n - 1 times?

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问题 After reading polygenelubricants's series of articles on advanced regular expressions techniques (particularly How does this Java regex detect palindromes?), I decided to attempt to create my own PCRE regex to parse a palindrome, using recursion (in PHP). What I came up with was: ^(([a-z])(?1)\2|[a-z]?)$ My understanding of this expression is that it should either match zero or one characters (every string of less than 2 characters is implicitly a palindrome, as well as to account for

nginx : rewrite rule to remove /index.html from the $request_uri

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问题 I've seen a few ways to rewrite the $request_uri and add the index.html to it when that particular file exists in the file system, like so: if (-f $request_filename/index.html) { rewrite (.*) $1/index.html break; } but i was wondering if the opposite is achievable: i.e. when somebody requests http://example.com/index.html , they're redirected to http://example.com Because the nginx regexp is perl compatible, i tried something like this: if ( $request_uri ~* "index\.html$" ) { set $new_uri

regex (in PHP) to match & that aren't HTML entities

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问题 Here's the goal: to replace all standalone ampersands with & but NOT replace those that are already part of an HTML entity such as . I think I need a regular expression for PHP (preferably for preg_ functions) that will match only standalone ampersands. I just don't know how to do that with preg_replace. 回答1: You could always run html_entity_decode before you run htmlentities ? Works unless you only want to do ampersands (and even then you can play with the charset parameters). Much easier

Nginx之一

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libevent :高性能的网络库　　epoll（） nginx调用了libevent库中的epoll Epoll --异步模型　　支持一个进程打开大数目的socket描述符　　IO效率不随FD数据增加而线性下降　　使用mmap加速内核与用户空间的消息传递　　边缘出发和水平触发 Nginx 采用C进行编写，不论是系统资源开销还是CPU使用率都比Perlbal要好很多优点：　　主要应用类别：　　使用Nginx结合FastCGI运行PHP、JSP、Perl等程序　　使用Nginx作反向代理、负载均衡、规则过滤　　使用Nginx运行静态HTML页面、图片　　Nginx与其他新技术的结合应用基本功能：　　静态资源的web服务器，能缓存打开的文件描述符；　　http、smtp、pop3协议的反向代理服务器；　　缓存加速、负载均衡；　　支持FastCGI(fpm、LNMP)，uWSGI（Python）；　　模块化（非DSO机制）、过滤器zip、SSI及图像的大小调整；　　支持SSL 扩展功能：　　基于名称和IP的虚拟主机；　　支持平滑升级，支持url rewrite，支持路径别名；　　支持keepalive；　　支持基于IP及用户访问控制；　　支持速率限制，支持并发数限制　三、Nginx的模块与工作原理　　Nginx由内核和模块组成

CentOS7 安装nginx部署vue项目

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简单描述：代码开发完了，需要环境来运行测试。服务器上没有nginx，搞起搞起。在Centos下，yum源不提供nginx的安装，可以通过切换yum源的方法获取安装。也可以通过直接下载安装包的方法，**以下命令均需root权限执行**：首先安装必要的库（nginx 中gzip模块需要 zlib 库，rewrite模块需要 pcre 库，ssl 功能需要openssl库）。选定**/usr/local**为安装目录，以下具体版本号根据实际改变。安装：1.安装gcc gcc-c++(如新环境,未安装请先安装)　　$ yum install -y gcc gcc-c++2.安装PCRE库　　1. $ cd /usr/local/　　2. $ wget http://jaist.dl.sourceforge.net/project/pcre/pcre/8.33/pcre-8.33.tar.gz　　3. $ tar -zxvf pcre-8.33.tar.gz　　4. $ cd pcre-8.33　　5.　$ ./configure　　6. $ make && make install　　如报错:configure: error: You need a C++ compiler for C++ support　　解决:yum install -y gcc gcc-c++3.安装SSL库　

Converting PCRE to POSIX regular expression

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问题 I am working on a MySQL database and noticed that it doesn't natively support PCRE (requires a plugin). I wish to use these three for some data validation (these are actually the values given to the pattern attribute): ^[A-z\. ]{3,36} ^[a-z\d\.]{3,24}$ ^(?=^.{4,}$)(?=.*\d)(?=.*[a-z])(?=.*[A-Z])(?!.*\s).*$ How do I do this? I looked on the web but couldn't find any concrete examples or answers. Also there seem to exist no utilities that could do this automatically. I am aware that some times,

Extract single substring from each row of the series using regular expression with named capturing groups in the alternation operator

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问题 Given: Pandas series src of strings; Complex regular expression (for simplicity let '^(?:\d+ (\w+)|(\w+) \d+)$' ) that can extract some single substring (let each string matches regex). The goal: get pandas series (i.e. "column") that has extracted substrings from source series. For example (note, this is simplified example - in the real case regular expression is more complex, i.e. it's difficult to rewrite it to regex with single capturing group): src = pandas.Series(['1 s', '2 ss', 'sss 3'

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