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

What’s still popular is the ease of use, flexibility and a strong ecosystem. 1) Ease of use and simple syntax make it the first choice for beginners. 2) Closely integrated with web development, excellent interaction with HTTP requests and database. 3) The huge ecosystem provides a wealth of tools and libraries. 4) Active community and open source nature adapts them to new needs and technology trends.

PHP and Python are both high-level programming languages that are widely used in web development, data processing and automation tasks. 1.PHP is often used to build dynamic websites and content management systems, while Python is often used to build web frameworks and data science. 2.PHP uses echo to output content, Python uses print. 3. Both support object-oriented programming, but the syntax and keywords are different. 4. PHP supports weak type conversion, while Python is more stringent. 5. PHP performance optimization includes using OPcache and asynchronous programming, while Python uses cProfile and asynchronous programming.

PHP is mainly procedural programming, but also supports object-oriented programming (OOP); Python supports a variety of paradigms, including OOP, functional and procedural programming. PHP is suitable for web development, and Python is suitable for a variety of applications such as data analysis and machine learning.

PHP originated in 1994 and was developed by RasmusLerdorf. It was originally used to track website visitors and gradually evolved into a server-side scripting language and was widely used in web development. Python was developed by Guidovan Rossum in the late 1980s and was first released in 1991. It emphasizes code readability and simplicity, and is suitable for scientific computing, data analysis and other fields.

PHP is suitable for web development and rapid prototyping, and Python is suitable for data science and machine learning. 1.PHP is used for dynamic web development, with simple syntax and suitable for rapid development. 2. Python has concise syntax, is suitable for multiple fields, and has a strong library ecosystem.

PHP remains important in the modernization process because it supports a large number of websites and applications and adapts to development needs through frameworks. 1.PHP7 improves performance and introduces new features. 2. Modern frameworks such as Laravel, Symfony and CodeIgniter simplify development and improve code quality. 3. Performance optimization and best practices further improve application efficiency.

PHPhassignificantlyimpactedwebdevelopmentandextendsbeyondit.1)ItpowersmajorplatformslikeWordPressandexcelsindatabaseinteractions.2)PHP'sadaptabilityallowsittoscaleforlargeapplicationsusingframeworkslikeLaravel.3)Beyondweb,PHPisusedincommand-linescrip

PHP type prompts to improve code quality and readability. 1) Scalar type tips: Since PHP7.0, basic data types are allowed to be specified in function parameters, such as int, float, etc. 2) Return type prompt: Ensure the consistency of the function return value type. 3) Union type prompt: Since PHP8.0, multiple types are allowed to be specified in function parameters or return values. 4) Nullable type prompt: Allows to include null values and handle functions that may return null values.


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