上载替换映像路径REGEX时的Coldfusion

Question

我试图写正则表达式来搜索和替换图像路径，并保持相同的文件名到我的远程服务器路径的现有路径。

用户正在上传我想要的HTML文件，同时在保存到数据库之前上传替换路径。

我写了一些正则表达式，但在网上找到的正则表达式中，它似乎不能正常工作。

请在下面找到代码片段...

 for example this my HTML content. <cfsavecontent variable="htmlcont"> <html> <head> </head> <body> <a href='http://www.w3schools.com'><img src='http://www.w3schools.com/images/w3schools.png' alt='W3Schools.com' class='img-responsive'></a> <div class="w3-row"> <div class="w3-third w3-center"> <h2>JPG Images</h2> <img alt="Mountain View" src="pic_mountain.jpg" style="width: 304px; height: auto" class="img-responsive"> </div> <div class="w3-third w3-center"> <h2>GIF Images</h2> <img alt="" src="html5.gif" style="width: 128px; height: auto" class="img-responsive"> </div> <div class="w3-third w3-center"> <h2>PNG Images</h2> <img alt="Graph" src="pic_graph.png" style="width: 170px; height: auto" class="img-responsive"> </div> </div> <table class="lamp"><tr> <th style="width:34px"> <img src="/images/lamp.jpg" alt="Note" style="height:32px;width:32px"></th> <td>Always specify the width and height of an image. If width and height are not specified, the page will flicker while the image loads. </td> </tr></table> <hr> <table class="lamp"><tr> <th style="width:34px"> <img src="/images/lamp.jpg" alt="Note" style="height:32px;width:32px"></th> <td>Add &quot;border:0;&quot; to prevent IE9 (and earlier) from displaying a border around the image.</td> </tr></table> <hr> </body> </html> </cfsavecontent> 

我试图取代

http://www.w3schools.com/images/w3schools.png

至

http://myremoteServer.com/234001/images/w3schools.png

要么

<img alt="Graph" src="pic_graph.png" style="width: 170px; height: auto" class="img-responsive">

至

<img alt="Graph" src="http://myremoteServer.com/234001/images/pic_graph.png" style="width: 170px; height: auto" class="img-responsive">

码：

 <cfset regxv = 'src="\\K[^"]*(?=")' /> <cfset resluthtml = REReplace (htmlcont,regxv, "http://myremoteServer.com/234001/images/") /> <cfdump var="#resluthtml#" label="resluthtml" > 

Answer 1

使用ColdFusion的内置引擎（Jakarta ORO，Perl）进行捕捉是一个麻烦。 因此，让我们在这里使用一些Java魔术（POSIX）：

<cfset regex    = createObject("java", "java.util.regex.Pattern").compile('<img [^>]*src=["'']([^"'']*)["'']')>

<cfset result   = createObject("java", "java.lang.StringBuilder").init()>
<cfset matcher  = regex.matcher(htmlcont)>
<cfset last     = 0>

<cfloop condition="matcher.find()">

    <cfset result.append(
        htmlcont.substring(
            last,
            matcher.start()
        )
    )>

    <cfset token = matcher.group(
        javaCast("int", ( matcher.groupCount() gte 1 ? 1 : 0 ))
    )>

    <!--- go with your replace logic here, token is the value of the [src] attribute --->
    <cfset token = ("http://myremoteServer.com/234001/images/" & listLast(token, "/"))>

    <cfset result.append(token)>

    <cfset last = matcher.end()>
</cfloop>

<cfset result.append(
    htmlcont.substring(last)
)>
<cfset result = result.toString()>

<cfdump var="#result#">