package cn.ac.cintcm.spider.cnki;

import java.io.IOException;

import org.apache.commons.httpclient.DefaultHttpMethodRetryHandler;
import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.HttpException;
import org.apache.commons.httpclient.HttpStatus;
import org.apache.commons.httpclient.methods.GetMethod;
import org.apache.commons.httpclient.params.HttpMethodParams;

public class GetUrlContent {

	private String url;
	
	public GetUrlContent(String url) {
		this.url = url;
	}
	
	public String getContent() {
	    HttpClient client = new HttpClient();
	    GetMethod method = new GetMethod(url);
	    String content = null;
	    method.getParams().setParameter(HttpMethodParams.RETRY_HANDLER, 
	    		new DefaultHttpMethodRetryHandler(3, false));
	    try {
	      int statusCode = client.executeMethod(method);
	      if (statusCode != HttpStatus.SC_OK) {
	        System.err.println("Method failed: " + method.getStatusLine());
	      }
	      byte[] responseBody = method.getResponseBody();
//	      content = new String(responseBody);
	      content = new String(responseBody, "UTF-8");	      
	    } catch (HttpException e) {
	      System.err.println("Fatal protocol violation: " + e.getMessage());
	      e.printStackTrace();
	    } catch (IOException e) {
	      System.err.println("Fatal transport error: " + e.getMessage());
	      e.printStackTrace();
	    } finally {
	      method.releaseConnection();
	    }  
	    return content;
	  }
}