phontomjs webPage模块方法

2024-05-07 02:08
文章标签 模块 方法 webpage phontomjs

本文主要是介绍phontomjs webPage模块方法，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

随时随地技术实战干货，获取项目源码、学习资料，请关注源代码社区公众号(ydmsq666)

addCookie

addCookie(Cookie) {boolean}

Introduced: PhantomJS 1.7

Add a Cookie to the page. If the domain does not match the current page, the Cookie will be ignored/rejected. Returns true if successfully added, otherwise false.

Examples

var webPage = require('webpage');
var page = webPage.create();phantom.addCookie({'name'     : 'Valid-Cookie-Name',   /* required property */'value'    : 'Valid-Cookie-Value',  /* required property */'domain'   : 'localhost','path'     : '/foo',                /* required property */'httponly' : true,'secure'   : false,'expires'  : (new Date()).getTime() + (1000 * 60 * 60)   /* <-- expires in 1 hour */

childFramesCount

Deprecated.

Examples

var webPage = require('webpage');
var page = webPage.create();
// @TODO: Finish page.childFramesCount example.

childFramesName

Deprecated.

Examples

var webPage = require('webpage');
var page = webPage.create();
// @TODO: Finish page.childFramesName example.

clearCookies

clearCookies() {void}

Introduced: PhantomJS 1.7

Delete all Cookies visible to the current URL.

Examples

var webPage = require('webpage');
var page = webPage.create();
// @TODO: Finish page.clearCookies example.

close

close() {void}

Introduced: PhantomJS 1.7

Close the page and releases the memory heap associated with it. Do not use the page instance after calling this.

Due to some technical limitations, the web page object might not be completely garbage collected. This is often encountered when the same object is used over and over again. Calling this function may stop the increasing heap allocation.

Examples

var webPage = require('webpage');
var page = webPage.create();
// @TODO: Finish page.close example.

currentFrameName

Deprecated.

Examples

var webPage = require('webpage');
var page = webPage.create();
// @TODO: Finish page.currentFrameName example.

deleteCookie

deleteCookie(cookieName) {boolean}

Introduced: PhantomJS 1.7

Delete any Cookies visible to the current URL with a ‘name’ property matching cookieName. Returns true if successfully deleted, otherwise false.

Examples

var webPage = require('webpage');
var page = webPage.create();page.deleteCookie('Added-Cookie-Name');

evaluateAsync

evaluateAsync(function, [delayMillis, arg1, arg2, ...]) {void}

Evaluates the given function in the context of the web page, without blocking the current execution. The function returns immediately and there is no return value. This is useful to run some script asynchronously.

The second argument indicates the time (in milliseconds) before the function should execute. The remaining arguments are passed to the function, as with evaluate. You must specify a delay (which can be 0) if you want to pass in any arguments.

Examples

Asynchronous AJAX

var webPage = require('webpage');
var page = webPage.create();page.open("", function(status) {page.includeJs("http://ajax.googleapis.com/ajax/libs/jquery/1.6.1/jquery.min.js", function() {page.evaluateAsync(function() {$.ajax({url: "api1", success: function() {}});});page.evaluateAsync(function(apiUrl) {$.ajax({url: apiUrl, success: function() {}});}, 1000, "api2");});
});

evaluateJavaScript

evaluateJavaScript(str)

Evaluate a function contained in a string.

evaluateJavaScript evaluates the function defined in the string in the context of the web page. It is similar to evaluate.

Examples

Set a variable and log it from the web page

This example passes a constant value from phantomjs to the window object in the context of the web page, and then logs that value.

var webPage = require('webpage');
var page = webPage.create();page.onConsoleMessage = function(msg) {console.log('The web page said: ' + msg);
};page.open('http://phantomjs.org/', function(status) {var script1 = "function(){ window.phantomVar='phantomjs made me do it!'; }";var script2 = "function(){ console.log(window.phantomVar); }";page.evaluateJavaScript(script1);page.evaluateJavaScript(script2);phantom.exit();
});

Notice that str must contain the text of a function declaration. The declared function is invoked immediately.

If you try to use it simply to define a variable like this. it won’t work.

  page.evaluateJavaScript("window.phantomVar='phantomjs made me do it!';"); /*wrong*/

If you try this you’ll get an error message like this:

SyntaxError: Expected token ')'phantomjs://webpage.evaluate():1 in evaluateJavaScript

Extract the phantomjs.org website’s logo url

var webPage = require('webpage');
var page = webPage.create();page.onConsoleMessage = function(msg) {console.log('CONSOLE: ' + msg);
};page.open('http://phantomjs.org/', function(status) {var logoUrl = page.evaluateJavaScript('function(){return document.body.querySelector("img").src;}');console.log(logoUrl); // http://phantomjs.org/img/phantomjs-logo.pngphantom.exit();});

evaluate

evaluate(function, arg1, arg2, ...) {object}

Evaluates the given function in the context of the web page. The execution is sandboxed, the web page has no access to the phantom object and it can’t probe its own setting.

Examples

Get the page title from Bing.com (1)

var webPage = require('webpage');
var page = webPage.create();page.open('http://m.bing.com', function(status) {var title = page.evaluate(function() {return document.title;});console.log(title);phantom.exit();});

Get the page title from Bing.com (2)

As of PhantomJS 1.6, JSON-serializable arguments can be passed to the function. In the following example, the text value of a DOM element is extracted.

The following example achieves the same end goal as the previous example but the element is chosen based on a selector which is passed to the evaluate call:

page.open('http://m.bing.com', function(status) {var title = page.evaluate(function(s) {return document.querySelector(s).innerText;}, 'title');console.log(title);phantom.exit();});

Note: The arguments and the return value to the evaluate function must be a simple primitive object. The rule of thumb: if it can be serialized via JSON, then it is fine.

Closures, functions, DOM nodes, etc. will not work!

Any console message from a web page, including from the code inside evaluate, will not be displayed by default. To override this behavior, use the onConsoleMessage callback. The first example can be rewritten to:

Get the page title from Bing.com and print it inside evaluate

var webPage = require('webpage');
var page = webPage.create();page.onConsoleMessage = function(msg) {console.log(msg);
}page.open('http://m.bing.com', function(status) {page.evaluate(function() {console.log(document.title);});phantom.exit();});

getPage

getPage(windowName)

Examples

var webPage = require('webpage');
var page = webPage.create();
// @TODO: Finish page.getPage example.

goBack

goBack()

Examples

var webPage = require('webpage');
var page = webPage.create();
// @TODO: Finish page.goBack example.

goForward

goForward()

Examples

var webPage = require('webpage');
var page = webPage.create();
// @TODO: Finish page.goForward example.

go

go(index)

Examples

var webPage = require('webpage');
var page = webPage.create();
// @TODO: Finish page.go example.

includeJs

includeJs(url, callback) {void}

Includes external script from the specified url (usually a remote location) on the page and executes the callback upon completion.

Examples

var webPage = require('webpage');
var page = webPage.create();page.includeJs(// Include the https version, you can change this to http if you like.'https://ajax.googleapis.com/ajax/libs/jquery/1.8.2/jquery.min.js',function() {(page.evaluate(function() {// jQuery is loaded, now manipulate the DOMvar $loginForm = $('form#login');$loginForm.find('input[name="username"]').value('phantomjs');$loginForm.find('input[name="password"]').value('c45p3r');}))}
);

injectJs

injectJs(filename) {boolean}

Injects external script code from the specified file into the page (like page.includeJs, except that the file does not need to be accessible from the hosted page).

If the file cannot be found in the current directory, libraryPath is used for additional look up.

This function returns true if injection is successful, otherwise it returns false.

Examples

Inject do.js file into phantomjs.org page

var webPage = require('webpage');
var page = webPage.create();page.open('http://www.phantomjs.org', function(status) {if (status === "success") {page.includeJs('http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js', function() {if (page.injectJs('do.js')) {var title = page.evaluate(function() {// returnTitle is a function loaded from our do.js file - see belowreturn returnTitle();});console.log(title);phantom.exit();}});}
});

Where do.js is simply:

window.returnTitle = function() {return document.title;
};

The console log will be:

"PhantomJS | PhantomJS"

Note: The arguments and the return value to the evaluate function must be a simple primitive object. The rule of thumb: if it can be serialized via JSON, then it is fine.

Closures, functions, DOM nodes, etc. will not work!

openUrl

openUrl(url, httpConf, settings)

Examples

var webPage = require('webpage');
var page = webPage.create();
// @TODO: Finish page.openUrl example.

open

open(url, callback) {void}

open(url, method, callback) {void}

open(url, method, data, callback) {void}

open(url, settings, callback) {void}

Opens the url and loads it to the page. Once the page is loaded, the optional callbackis called using page.onLoadFinished, with the page status ('success' or 'fail') provided to it.

Examples

GET google.com and report “success” or “fail”

var webPage = require('webpage');
var page = webPage.create();page.open('http://www.google.com/', function(status) {console.log('Status: ' + status);// Do other things here...
});

POST data to google.com and report “success” or “fail”

As of PhantomJS 1.2, the open function can be used to request a URL with methods other than GET. This syntax also includes the ability to specify data to be sent with the request. In the following example, we make a request using the POST method, and include some basic data.

var webPage = require('webpage');
var page = webPage.create();
var postBody = 'user=username&password=password';page.open('http://www.google.com/', 'POST', postBody, function(status) {console.log('Status: ' + status);// Do other things here...
});

POST json data to your.custom.api in utf-8 encoding

As of PhantomJS 1.9, the open function can get an object of settings. and with a use of “encoding” key, you can set the custom encoding to your app. In this example, we’ve set the encoding to UTF8, and set the Content-Type header to application/json for making our server know the request has information in json format and not in urlencoded format.

var webPage = require('webpage');
var page = webPage.create();
var settings = {operation: "POST",encoding: "utf8",headers: {"Content-Type": "application/json"},data: JSON.stringify({some: "data",another: ["custom", "data"]})
};page.open('http://your.custom.api', settings, function(status) {console.log('Status: ' + status);// Do other things here...
});

release

release() {void}

Stability: DEPRECATED - Use page.close

Releases memory heap associated with this page. Do not use the page instance after calling this.

Due to some technical limitations, the web page object might not be completely garbage collected. This is often encountered when the same object is used over and over again. Calling this function may stop the increasing heap allocation.

Examples

var webPage = require('webpage');
var page = webPage.create();
// @TODO: Finish page.release example.

reload

Examples

var webPage = require('webpage');
var page = webPage.create();
// @TODO: Finish page.reload example.

renderBase64

renderBase64(format)

Renders the web page to an image buffer and returns the result as a Base64-encoded string representation of that image.

Supported formats

  • PNG
  • GIF
  • JPEG

Examples

var webPage = require('webpage');
var page = webPage.create();page.viewportSize = {width: 1920,height: 1080
};page.open('http://phantomjs.org', function (status) {var base64 = page.renderBase64('PNG');console.log(base64);phantom.exit();
});

renderBuffer

renderBuffer(format, quality)

Renders the web page to an image buffer which can be sent directly to a client (e.g. using the webserver module)

Supported formats

  • PNG
  • GIF
  • JPEG

Examples

var server = require('webserver').create();var listening = server.listen(8001, function(request, response) {var url = "http://phantomjs.org", format = 'png', quality = -1;var page = require('webpage').create();page.viewportSize = {width: 800,height: 600};page.open(url, function start(status) {// Buffer is an Uint8ClampedArrayvar buffer = page.renderBuffer(format, quality);response.statusCode = 200;response.headers = {"Cache": "no-cache","Content-Type": "image/" + format};page.close();// Pass the Buffer to 'write' to send the Uint8ClampedArray to the clientresponse.write(buffer);response.close();});});

render

render(filename [, {format, quality}]) {void}

Renders the web page to an image buffer and saves it as the specified filename.

Currently, the output format is automatically set based on the file extension.

Supported formats

  • PDF
  • PNG
  • JPEG
  • BMP
  • PPM
  • GIF support depends on the build of Qt used

Quality

An integer between 0 and 100.

The quality setting only has an effect on jpeg and png formats. With jpeg, it sets the quality level as a percentage, in the same way as most image editors. (The output file always has 2x2 subsampling.) A level of 0 produces a very small, very low quality file, and 100 produces a much larger, high-quality file. The default level is 75. With png, it sets the lossless (Deflate) compression level, with 0 producing the smallest files, and 100 producing the largest. However, the files look identical, and are always true-colour.

Examples

var webPage = require('webpage');
var page = webPage.create();page.viewportSize = { width: 1920, height: 1080 };
page.open("http://www.google.com", function start(status) {page.render('google_home.jpeg', {format: 'jpeg', quality: '100'});phantom.exit();
});

More information

The image generation code (except for PDF output) uses QImage from the Qt framework, documented at http://doc.qt.io/qt-5/qimage.html#save.

sendEvent

Sends an event to the web page.

1.7 implementation source.

The events are not synthetic DOM events, each event is sent to the web page as if it comes as part of user interaction.

Mouse events

sendEvent(mouseEventType[, mouseX, mouseY, button='left'])

The first argument is the event type. Supported types are 'mouseup', 'mousedown', 'mousemove', 'doubleclick' and 'click'. The next two arguments are optional but represent the mouse position for the event.

The button parameter (defaults to left) specifies the button to push.

For 'mousemove', however, there is no button pressed (i.e. it is not dragging).

Keyboard events

sendEvent(keyboardEventType, keyOrKeys, [null, null, modifier])

The first argument is the event type. The supported types are: keyup, keypress and keydown. The second parameter is a key (from page.event.key), or a string.

You can also indicate a fifth argument, which is an integer indicating the modifier key.

  • 0: No modifier key is pressed
  • 0x02000000: A Shift key on the keyboard is pressed
  • 0x04000000: A Ctrl key on the keyboard is pressed
  • 0x08000000: An Alt key on the keyboard is pressed
  • 0x10000000: A Meta key on the keyboard is pressed
  • 0x20000000: A keypad button is pressed

Third and fourth argument are not taken account for keyboard events. Just give null for them.

Examples

Simulate a shift+alt+A keyboard combination

var webPage = require('webpage');
var page = webPage.create();page.sendEvent('keypress', page.event.key.A, null, null, 0x02000000 |

setContent

Introduced: PhantomJS 1.8

Allows to set both page.content and page.url properties.

The webpage will be reloaded with the new content and the current location set as the given url, without any actual http request being made.

Examples

var webPage = require('webpage');
var page = webPage.create();
var expectedContent = '<html><body><div>Test div</div></body></html>';
var expectedLocation = 'http://www.phantomjs.org/';
page.setContent(expectedContent, expectedLocation);

stop

Examples

var webPage = require('webpage');
var page = webPage.create();
// @TODO: Finish page.stop example.

switchToChildFrame

switchToChildFrame(frameName) or switchToChildFrame(framePosition)

Deprecated.

Examples

var webPage = require('webpage');
var page = webPage.create();
// @TODO: Finish page.switchToChildFrame example.

switchToFocusedFrame

Examples

var webPage = require('webpage');
var page = webPage.create();
// @TODO: Finish page.switchToFocusedFrame example.

switchToFrame

if the page have othe frame, you can use switchToFrame(frameName) or switchToFrame(framePosition) to exchange it.Other similar methods are switchToChildFrame(),switchToFocusedFrame,switchToMainFrame and switchToParentFrame

Examples

var webPage = require('webpage');
var page = webPage.create();
page.open('http://www.sample.com',function(status){if(status!== 'success'){console.log('Unable to access network');}else{page.switchToFrame('framwName/framwPosition');console.log(page.frameContent);phantom.exit();}
});

switchToMainFrame

Examples

var webPage = require('webpage');
var page = webPage.create();
// @TODO: Finish page.switchToMainFrame example.

switchToParentFrame

Examples

var webPage = require('webpage');
var page = webPage.create();
// @TODO: Finish page.switchToParentFrame example.

uploadFile

uploadFile(selector, filename)

Uploads the specified file (filename) to the form element associated with the selector.

This function is used to automate the upload of a file, which is usually handled with a file dialog in a traditional browser. Since there is no dialog in this headless mode, such an upload mechanism is handled via this special function instead.

Examples

var webPage = require('webpage');
var page = webPage.create();page.uploadFile('input[name=image]', '/path/to/some/photo.jpg');

这篇关于phontomjs webPage模块方法的文章就介绍到这儿，希望我们推荐的文章对编程师们有所帮助！


http://www.chinasem.cn/article/966032。

相关文章

springboot+redis实现订单过期(超时取消)功能的方法详解

springboot+redis实现订单过期(超时取消)功能的方法详解

《springboot+redis实现订单过期(超时取消)功能的方法详解》在SpringBoot中使用Redis实现订单过期（超时取消）功能,有多种成熟方案,本文为大家整理了几个详细方法,文中的示例代... 目录一、Redis键过期回调方案（推荐）1. 配置Redis监听器2. 监听键过期事件3. Redi
阅读更多...
基于SpringBoot实现分布式锁的三种方法

基于SpringBoot实现分布式锁的三种方法

《基于SpringBoot实现分布式锁的三种方法》这篇文章主要为大家详细介绍了基于SpringBoot实现分布式锁的三种方法,文中的示例代码讲解详细,感兴趣的小伙伴可以跟随小编一起学习一下... 目录一、基于Redis原生命令实现分布式锁1. 基础版Redis分布式锁2. 可重入锁实现二、使用Redisso
阅读更多...
自定义注解SpringBoot防重复提交AOP方法详解

自定义注解SpringBoot防重复提交AOP方法详解

《自定义注解SpringBoot防重复提交AOP方法详解》该文章描述了一个防止重复提交的流程,通过HttpServletRequest对象获取请求信息,生成唯一标识,使用Redis分布式锁判断请求是否... 目录防重复提交流程引入依赖properties配置自定义注解切面Redis工具类controller
阅读更多...
Java调用DeepSeek API的8个高频坑与解决方法

Java调用DeepSeek API的8个高频坑与解决方法

《Java调用DeepSeekAPI的8个高频坑与解决方法》现在大模型开发特别火,DeepSeek因为中文理解好、反应快、还便宜,不少Java开发者都用它,本文整理了最常踩的8个坑,希望对... 目录引言一、坑 1：Token 过期未处理，鉴权异常引发服务中断问题本质典型错误代码解决方案：实现 Token
阅读更多...
Nginx 访问控制的多种方法

Nginx 访问控制的多种方法

《Nginx访问控制的多种方法》本文系统介绍了Nginx实现Web访问控制的多种方法,包括IP黑白名单、路径/方法/参数控制、HTTP基本认证、防盗链机制、客户端证书校验、限速限流、地理位置控制等基... 目录一、IP 白名单与黑名单1. 允许/拒绝指定IP2. 全局黑名单二、基于路径、方法、参数的访问控制
阅读更多...
Python中Request的安装以及简单的使用方法图文教程

Python中Request的安装以及简单的使用方法图文教程

《Python中Request的安装以及简单的使用方法图文教程》python里的request库经常被用于进行网络爬虫,想要学习网络爬虫的同学必须得安装request这个第三方库,：本文主要介绍P... 目录1.Requests 安装cmd 窗口安装为pycharm安装在pycharm设置中为项目安装req
阅读更多...
nginx跨域访问配置的几种方法实现

nginx跨域访问配置的几种方法实现

《nginx跨域访问配置的几种方法实现》本文详细介绍了Nginx跨域配置方法,包括基本配置、只允许指定域名、携带Cookie的跨域、动态设置允许的Origin、支持不同路径的跨域控制、静态资源跨域以及... 目录一、基本跨域配置二、只允许指定域名跨域三、完整示例四、配置后重载 nginx五、注意事项六、支持
阅读更多...
MySQL查看表的历史SQL的几种实现方法

MySQL查看表的历史SQL的几种实现方法

《MySQL查看表的历史SQL的几种实现方法》：本文主要介绍多种查看MySQL表历史SQL的方法,包括通用查询日志、慢查询日志、performance_schema、binlog、第三方工具等,并... 目录mysql 查看某张表的历史SQL1.查看MySQL通用查询日志（需提前开启）2.查看慢查询日志3.
阅读更多...
MySQL底层文件的查看和修改方法

MySQL底层文件的查看和修改方法

《MySQL底层文件的查看和修改方法》MySQL底层文件分为文本类（可安全查看/修改）和二进制类（禁止手动操作）,以下按「查看方法、修改方法、风险管控三部分详细说明,所有操作均以Linux环境为例,需... 目录引言一、mysql 底层文件的查看方法1. 先定位核心文件路径（基础前提）2. 文本类文件（可直
阅读更多...
Java实现字符串大小写转换的常用方法

Java实现字符串大小写转换的常用方法

《Java实现字符串大小写转换的常用方法》在Java中,字符串大小写转换是文本处理的核心操作之一,Java提供了多种灵活的方式来实现大小写转换,适用于不同场景和需求,本文将全面解析大小写转换的各种方法... 目录前言核心转换方法1.String类的基础方法2. 考虑区域设置的转换3. 字符级别的转换高级转换
阅读更多...

Copyright China编程 23002807@qq.com

沪ICP备2023033072号-2