phantomjs

, httpUnit is used internally by HtmlUnitDriver in WebDirver. Therefore, the same problem occurs when HttpUnit is used. I have also conducted an experiment. This is indeed the case. Thread. sleep (2000) is used to wait for the js parsing to complete. I think it is not feasible. There is too much uncertainty, especially in large-scale capturing. To sum up, WebDriver is a framework designed for testing. Although it can theoretically be used to assist crawlers in obtaining html pages containing dyn

Getting a snapshot of a webpage and generating thumbnails can be done in two steps:1. Get a snapshot of a webpage2. Generate thumbnail imagesGet a snapshot of a webpageHere we use PHANTOMJS to achieve. You can refer to the official website for detailed usage of PHANTOMJS.1. InstallationMy environment is CentOS6.5, install directly download tarball then unzip can.# wget https://bitbucket.org/ariya/

Shell Scripts get web page snapshots and generate thumbnails You can take two steps to obtain a web snapshot and generate a thumbnail: 1. Get web snapshots 2. Generate a thumbnailGet web Snapshot Here we use phantomjs. For details about how to use phantomjs, refer to the official website.1. Installation My environment is CentOS6.5. During installation, download the tarball and decompress it. # Wget ht

, 3.2, 3.3, 3.4, and PyPy.Pip can be run in Unix/linux, Mac OS X, and Windows systems.A) Script installationPython get-pip.pyIf Setuptools (or distribute) is not installed, get-pip.py it will automatically install for you setuptoolsIf you need to upgrade setuptools (or distribute), runpipinstall-Usetuptoolsb) Command installationsudo apt-get install python-pip //Debian, Ubuntusudo yum install python-pip //CentOS, Redhat, Fedora2) PHANTOMJS Installatio

, to split the URL and transfer data, multiple parameters with connection. The encoding format of the URL is encoded in ASCII rather than Uniclde, meaning that all non-ASCII characters are encoded before being transmitted.POST request: The POST request places the requested data in the package body of the HTTP request packet. The item=bandsaw above is the actual transfer data. Therefore, the data for the GET request is exposed in the address bar, and the POST request does not. 2, the size of t

Writing an article often need to insert a picture, insert the existing picture is very simple, sometimes make some excellent list of sites need to add screenshots, this process is very boring, you can consider developing a command-line tool to pass a URL, and then generate a screenshot of the page. Use Node-webshot for Web screenshots The NPM module used has Yargs and node-webshot, and the Yargs article reference here is a complete guide to creating individual-specific command-line toolset--ya

have more than one name in the directory of your book project_book files directory, and the files in this directory are generated staticallyWebsite content.Build to the specified directory using the build parameterUnlike a static Web site file that is generated directly from the preview, using this command,You can enter the content into the directory you want:$ mkdir/tmp/gitbook$ Gitbook Build--output=/tmp/gitbook2.2 Output PDFTo enter as a PDF file, you need to first install the Gitbook PDF us

HtmlUnitDriver in WebDirver. Therefore, the same problem occurs when HttpUnit is used. I have also conducted an experiment. This is indeed the case. Thread. sleep (2000) is used to wait for the js parsing to complete. I think it is not feasible. There is too much uncertainty, especially in large-scale capturing. To sum up, WebDriver is a framework designed for testing. Although it can theoretically be used to assist crawlers in obtaining html pages containing dynamic content, it is not used in

The functionality provided by Jasper report is strong enough, but still not fully connected to the customer's needs, so we need to customize the components to complete the design of our report, environment configuration before development is still a hassle ...System: LinuxIde:jasper Studio (version:6.3)Server:jasper Server (version:6.3)Jasper Report Although support for custom components, but in the version we used, did not integrate some of the required configuration into the installation envir

Use the command line Casperjs to use the built-in phantomjs command line parser. In the cli module, it passes the parameter location naming options, but do not worry that it cannot skillfully control the API of the CLI module, A casper instance already contains the cli attribute, allowing you to easily use its parameters. Let's look at this simple casper Script: var casper = require ("casper "). create (); casper. echo ("Casper CLI passed args:"); req

This article mainly introduces the python timed kill process. For more information, see this article, for more information, see Previously, I wrote a python script to use selenium + phantomjs to crawl a new post. during The page loop pulling process, phantomjs is always blocked and the maximum wait time setting using WebDriverWait is invalid. No improvement in replacing

The server CentOS, because it needs to call PHANTOMJS, has installed the PHANTOMJS binaries, and, on Putty, tried PHANTOMJS--version to output normally: 1.9.8. Then try the following: exec("phantomjs --version", $o, $e);echo $e;//返回127 Very puzzled, and tried again: exec("ls", $o, $e);echo $e;//还是返回127 Google for a lo

In-depth analysis of python timed killing process and analysis of python Process Previously, I wrote a python script to use selenium + phantomjs to crawl a New post. During the page loop pulling process, phantomjs is always blocked and the maximum wait time setting using WebDriverWait is invalid. No improvement in replacing phantomjs with firefox Because this scr

comparison intuitively shows the differences in images. If a threshold is reached, the page may be abnormal.Phanw.ssPhanw.ss is a famous tool for Pixel comparison. Phanw.ss combines Casperjs and ResembleJs image comparison and analysis. It is good in terms of ease of use and comparison.Does not support PhantomJS 2.0Because PhantomJS 2.0 temporarily disables file upload,

Before writing a Python script to crawl new posts with SELENIUM+PHANTOMJS, in the process of looping the page, PHANTOMJS always block, use webdriverwait set the maximum wait time is invalid. Replace PHANTOMJS with Firefox without improvement Because this script will not be used for a long time, take a temporary approach by opening a new sub-thread fixed cycle t

This article mainly introduces in-depth analysis of Python timing killing process related data, the need for friends can refer to the following Before writing a Python script to crawl new posts with SELENIUM+PHANTOMJS, in the process of looping the page, PHANTOMJS always block, use webdriverwait set the maximum wait time is invalid. Replace PHANTOMJS with Firefo

Last introduced how to use Nodejs + PHANTOMJS for screenshots, but because of each screenshot operation, has enabled a PHANTOMJS process, so the concurrent volume up, the efficiency is worrying, so we rewrite all the code, and its independence into a module, convenient to call.How to improve? control number of threads and the number of single-threaded processing URLs. Use standard Output WebSocket for comm

elements in the first screen of the user's browser.User-operational time (DOM ready): The time at which certain features of a Web site can be used. Total page Download time (onload): All resources in the Web site are loaded and available time. Front end Test tool To do good things will benefit its device, in the in-depth discussion if we build a visual test tool, we have to discuss the current front-end popular test tools PHANTOMJS Tool Address: http

Web pages, on various forums to find all kinds of information, with n kinds of things, scapy,pyqt and so on, walked a lot of detours, not not, it should be I will not use , the final use of selenium and PHANTOMJS, these two should also be the most popular crawler modules now. First, import selenium and Phantomjs From selenium import webdriverdriver = Webdriver. Phantom