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Summary and sharing of regular expression methods for processing image addresses and img tags

巴扎黑
Release: 2023-03-10 14:58:01
Original
1609 people have browsed it

这篇文章主要介绍了正则表达式处理图片地址、img标签的方法,非常不错,具有参考借鉴价值,需要的朋友可以参考下

再上传表情或者图片地址时候很多时候不能直接上传<img src=" " />,因此在上传评论或者图片之前应该先处理一下img标签。举例如下,希望可以帮助更多的程序猿~


<span style="font-size:14px;">//第一步是获取到带有img标签的字符串 
var str = &#39;图片1<img src="arclist/sanai.png">图片2<img src="arclist/em_23.gif">图片3<img src="arclist/451.gif">&#39;;</span>
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处理获取到的字符串


<span style="font-size:14px;">//将img标签替换为特定编码方式的表达式 
var reg = /<img[^>]*src[=\"\&#39;\s]+[^\.]*\/([^\.]+)\.[^\"\&#39;]+[\"\&#39;]?[^>]*>/gi; 
str = str.replace(reg, "[face:$1.gif]"); 
console.log(str);</span>
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运算结果为:


<span style="font-size:14px;">图片1[face:sanai.gif]图片2[face:em_23.gif]图片3[face:451.gif]</span>
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这样上传到服务器的代码就不会存在html标签,这是一种很好的应对带有图片评论且上传信息禁止html标签的方法。

接下来:

从服务器上返回的上一步中的运行结果,在反向解析,方法如下:


<span style="font-size:14px;">//将特定编码方式替换成img标签的表达式 
var regg = /
face:([\w]+).gif
/gi; 
str = str.replace(regg,"<img src=&#39;images/$1.gif&#39; />"); 
console.log(str);</span>
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运行结果为:


<span style="font-size:14px;">图片1<img src=&#39;images/sanai.gif&#39; />图片2<img src=&#39;images/em_23.gif&#39; />图片3<img src=&#39;images/451.gif&#39; /></span>
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下面附上代码的html页,可以全部复制粘贴到html文件中直接运行,亲测可用


<span style="font-size:14px;"><!DOCTYPE html> 
<html> 
 <head> 
  <meta charset="UTF-8"> 
  <title></title> 
 </head> 
 <body> 
  <script> 
   var str = &#39;图片1<img src="arclist/sanai.png">图片2<img src="arclist/em_23.gif">图片3<img src="arclist/451.gif">&#39;; 
   //将img标签替换为特定编码方式的表达式 
   var reg = /<img[^>]*src[=\"\&#39;\s]+[^\.]*\/([^\.]+)\.[^\"\&#39;]+[\"\&#39;]?[^>]*>/gi; 
   str = str.replace(reg, "[face:$1.gif]"); 
   console.log(str); 
   //将特定编码方式替换成img标签的表达式 
   var regg = /
face:([\w]+).gif
/gi; 
   str = str.replace(regg,"<img src=&#39;images/$1.gif&#39; />"); 
   console.log(str); 
  </script> 
 </body> 
</html></span>
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以上两种方法很好的解决的对img标签的正反运算,第一种方法为之前收集,不记得原作者,如有冒犯可以提出署名。后一种方法为本人自写,存在一定的局限性,欢迎大家讨论~

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