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Home Backend Development PHP Tutorial javascript - 【PHP】【.NET】【JS】【AJAX】关于抓取网页源代码的问题

javascript - 【PHP】【.NET】【JS】【AJAX】关于抓取网页源代码的问题

Jun 06, 2016 pm 08:43 PM
.net ajax javascript php webbrowser

举例先:
用浏览器的查看源代码,只能看到网页第一次加载完成时候的源码。
然而现在很多网页都用到了AJAX技术,实际上会异步加载多次,最终呈现出来的效果和最初的源码有时候会差很多。
而我现在想要获取网页最终加载完成时候的源码。
或者说,我想获取网页每次AJAX获取值,然后通过JS修改源码之后的真实源码。
理论上说,是存在这样一份真实源码的,对吧。
用Chrome的审查元素也能获取的到的。

但是,现在我想用PHP或者.NET或者JS……
不知道大家有木有什么好的方法……
PC,WEB上都可以……不造有没有类似的函数,框架,类库,方法……
各种思路都可以……

http://www.moonlord.cn

回复内容:

举例先:
用浏览器的查看源代码,只能看到网页第一次加载完成时候的源码。
然而现在很多网页都用到了AJAX技术,实际上会异步加载多次,最终呈现出来的效果和最初的源码有时候会差很多。
而我现在想要获取网页最终加载完成时候的源码。
或者说,我想获取网页每次AJAX获取值,然后通过JS修改源码之后的真实源码。
理论上说,是存在这样一份真实源码的,对吧。
用Chrome的审查元素也能获取的到的。

但是,现在我想用PHP或者.NET或者JS……
不知道大家有木有什么好的方法……
PC,WEB上都可以……不造有没有类似的函数,框架,类库,方法……
各种思路都可以……

http://www.moonlord.cn

我之前的做法是:
1、用firebug抓包,看看ajax请求的api地址。
2、查看api请求的参数,如果没参数,直接第5步。
3、如果api的参数是在网页上面的。
4、到页面去找api的参数。(参数都是且必须是有规律的,没规律的话他就不可能把网页做成动态的了。)
5、然后带着api必须的参数再去采这个api的地址。(这时运气好的话采回来的直接是json数据,都不用处理html那么麻烦了)

PhantomJS, CasperJS

net的话WebBrowser

用浏览器的查看源代码,只能看到网页第一次加载完成时候的源码。
这是谁说的?

就是异步加载, 加载完成了你看到的也是完全加载的HTML代码。
抓取的多的很,Python有现成的

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