Merge pull request #414 from jsbd/master

新增构造函数，支持crawl.js路径自定义，因为当其他项目依赖此jar包时，runtime.exec()执行phantomjs命令时无使用法jar包中的crawl.js

webmagic-extension/src/main/java/us/codecraft/webmagic/downloader/PhantomJSDownloader.java

@@ -29,6 +29,7 @@ public class PhantomJSDownloader extends AbstractDownloader {
     public PhantomJSDownloader() {
         this.initPhantomjsCrawlPath();
     }
+    
     /**
      * 添加新的构造函数，支持phantomjs自定义命令
      * 
@@ -37,13 +38,50 @@ public class PhantomJSDownloader extends AbstractDownloader {
      *    phantomjs --ignore-ssl-errors=yes 忽略抓取地址是https时的一些错误
      *    /usr/local/bin/phantomjs 命令的绝对路径，避免因系统环境变量引起的IOException
      *   
-       * @param phantomJsCommand phantomJsCommand
+     * @param phantomJsCommand
      */
     public PhantomJSDownloader(String phantomJsCommand) {
         this.initPhantomjsCrawlPath();
         PhantomJSDownloader.phantomJsCommand = phantomJsCommand;
     }
     
+    /**
+     * 新增构造函数，支持crawl.js路径自定义，因为当其他项目依赖此jar包时，runtime.exec()执行phantomjs命令时无使用法jar包中的crawl.js
+     * 
+     * crawl.js start -->>
+     * 
+     *   var system = require('system');
+     *   var url = system.args[1];
+     *   
+     *   var page = require('webpage').create();
+     *   page.settings.loadImages = false;
+     *   page.settings.resourceTimeout = 5000;
+     *   
+     *   page.open(url, function (status) {
+     *       if (status != 'success') {
+     *           console.log("HTTP request failed!");
+     *       } else {
+     *           console.log(page.content);
+     *       }
+     *   
+     *       page.close();
+     *       phantom.exit();
+     *   });
+     *   
+     * <<-- crawl.js end
+     * 具体项目时可以将以上js代码复制下来使用
+     *   
+     * example:
+     *    new PhantomJSDownloader("/your/path/phantomjs", "/your/path/crawl.js");
+     * 
+     * @param phantomJsCommand
+     * @param crawlJsPath
+     */
+    public PhantomJSDownloader(String phantomJsCommand, String crawlJsPath) {
+      PhantomJSDownloader.phantomJsCommand = phantomJsCommand;
+      PhantomJSDownloader.crawlJsPath = crawlJsPath;
+    }
+    
     private void initPhantomjsCrawlPath() {
         PhantomJSDownloader.crawlJsPath = new File(this.getClass().getResource("/").getPath()).getPath() + System.getProperty("file.separator") + "crawl.js ";
     }
@@ -86,7 +124,7 @@ public class PhantomJSDownloader extends AbstractDownloader {
         try {
             String url = request.getUrl();
             Runtime runtime = Runtime.getRuntime();
-            Process process = runtime.exec(phantomJsCommand + " " + crawlJsPath + url);
+            Process process = runtime.exec(phantomJsCommand + " " + crawlJsPath + " " + url);
             InputStream is = process.getInputStream();
             BufferedReader br = new BufferedReader(new InputStreamReader(is));
             StringBuffer stringBuffer = new StringBuffer();