Phantomjs throws IOException

A description of the problem that is encountered with the Web page using PHANTOMJS:

1. Version of PHANTOMJS used: phantomjs-2.1.1-windows
2. Using the JS file, \phantomjs-2.1.1-windows\examples\rasterize.js
3. Java Driver code used:

Package Mackimg;import Java.io.bufferedreader;import Java.io.ioexception;import java.io.inputstream;import java.io.inputstreamreader;/** * @Description: Converted to image according to Web address * @Author: admin * @CreateDate: June 22, 2018 */public class Phanto    Mtools {private static string TempPath = "F:/PHANTOMJS";//Picture Save directory private static string BLANK = ""; The following content can be configured in the configuration file for private static String BinPath = "D:/phantomjs-2.1.1-windows/bin/phantomjs.exe";//plug-in introduction address private s Tatic string jspath = "d:/phantomjs-2.1.1-windows/rasterize.js";//JS Introduction address//execute CMD command public static String cmd (strin    G imgagepath, String URL) {return binpath + blank + jspath + blank + URL + blank + imgagepath; }//Close command public static void close (process process, BufferedReader BufferedReader) throws IOException {if (bu        Fferedreader = null) {bufferedreader.close ();            } if (process! = null) {Process.destroy ();        Process = NULL; }}/** * @paRam userId * @param URL * @throws IOException */public static void Printurlscreen2jpg (String url) throws ioexception{String Imgagepath = temppath+ "/" +system.currenttimemillis () + ". png";//Picture path//java using Runtime and Pro        The Cess class runs the external program process process = Runtime.getruntime (). EXEC (cmd (imgagepath,url));        InputStream InputStream = Process.getinputstream ();        BufferedReader reader = new BufferedReader (new InputStreamReader (InputStream));        String tmp = "";        while ((TMP = Reader.readline ()) = null) {close (Process,reader);    } System.out.println ("Success"); } public static void Main (string[] args) throws IOException {String url = "https://www.baidu.com/";//Baidu website first    Page for example phantomtools.printurlscreen2jpg (URL); }}

The above can refer to the article: Dot I dot I

An exception occurred after running:

Exception in thread "main" java.io.IOException: Stream closed    at java.io.BufferedReader.ensureOpen(BufferedReader.java:122)    at java.io.BufferedReader.readLine(BufferedReader.java:317)    at java.io.BufferedReader.readLine(BufferedReader.java:389)    at mackimg.PhantomTools.printUrlScreen2jpg(PhantomTools.java:48)    at mackimg.PhantomTools.main(PhantomTools.java:59)

Change URL:

String url = "http://www.cnblogs.com/han108/p/9216583.html";
Works correctly, but there are no pictures in the background.

Replace JS file

I saw another JS file that someone used on the internet, I named 22.js. The content is:

var page = require(‘webpage‘).create(),    system = require(‘system‘),    address, output, size;if (system.args.length < 3 || system.args.length > 5) {    console.log(‘Usage: rasterize.js URL filename‘);    phantom.exit(1);} else {    address = system.args[1];    output = system.args[2];    page.viewportSize = { width: 600, height: 600 };    page.open(address, function (status) {      // 通过在页面上执行脚本获取页面的渲染高度      var bb = page.evaluate(function () {         return document.getElementsByTagName(‘html‘)[0].getBoundingClientRect();       });      // 按照实际页面的高度，设定渲染的宽高      page.clipRect = {        top:    bb.top,        left:   bb.left,        width:  bb.width,        height: bb.height      };      // 预留一定的渲染时间      window.setTimeout(function () {        page.render(output);        page.close();        console.log(‘render ok‘);      }, 1000);    });}

1. Use Baidu link, throw the above mentioned exception. No pictures in the background
2. Use Cnblogs link, throw above exception, background with picture

Problem analysis

Don't understand, don't know, go fuck

Problem solving

1. Change the code to:

 while ((tmp = reader.readLine()) != null) {          }close(process,reader);

You can solve the problem of throwing exceptions and not getting pictures in the background, but if you use 22.js, the program will not stop automatically when it finishes running.

1. Notice that the last few lines of the 22.js file are:

 window.setTimeout(function () {        page.render(output);        page.close();        console.log(‘render ok‘);      }, 1000);    });

JS file execution will send a "render OK", which causes the Java code while ((tmp = reader.readLine()) != null) can not jump out of the block state, it is impossible to understand that the nature can not be executed at this time close(process,reader); , but still get the picture in the background.

If you change the code at this point to:

 while ((tmp = reader.readLine()) != null) {              close(process,reader);            break;        }

At this point can be normal operation, background also has pictures.

1. Under the condition of the second change, the JS file is changed to: \phantomjs-2.1.1-windows\examples\rasterize.js, the program can run normally, the background has pictures;

Recommended Solutions

The code changes to:

 while ((tmp = reader.readLine()) != null) {              close(process,reader);            break;        }

Phantomjs throws IOException