Java 嵌入Google AdSense 广告代码

GoogleAdSense.java

package my.util;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.net.URL;
import java.net.URLEncoder;

import javax.servlet.http.HttpServletRequest;

/**
 * 嵌入Google AdSense 广告代码
 * 
 * @author Winter Lau
 * @date 2009-7-1 下午10:49:27
 */
public class GoogleAdSense {

    private static final String PAGEAD = "http://pagead2.googlesyndication.com/pagead/ads?";

    static void googleAppendUrl(StringBuilder url, String param, String value)
        throws UnsupportedEncodingException {
      if (value != null) {
        String encodedValue = URLEncoder.encode(value, "UTF-8");
        url.append("&").append(param).append("=").append(encodedValue);
      }
    }

    static void googleAppendScreenRes(StringBuilder url, String uaPixels,
        String xUpDevcapScreenpixels) {
      String screenRes = uaPixels;
      String delimiter = "x";
      if (uaPixels == null) {
        screenRes = xUpDevcapScreenpixels;
        delimiter = ",";
      }
      if (screenRes != null) {
        String[] resArray = screenRes.split(delimiter);
        if (resArray.length == 2) {
          url.append("&u_w=").append(resArray[0]);
          url.append("&u_h=").append(resArray[1]);
        }
      }
    }

    static void googleAppendDcmguid(StringBuilder url, String dcmguid) {
      if (dcmguid != null) {
        url.append("&dcmguid=").append(dcmguid);
      }
    }

    /**
     * 显示广告
     * @param req
     * @param pub_id (pub-1307862221338762)
     * @param channel (4062021557)
     * @throws IOException 
     */
    public static String ad(HttpServletRequest req, String pub_id, String channel) throws IOException {

        long googleDt = System.currentTimeMillis();
        String googleHost = (req.isSecure() ? "https://" : "http://") + req.getHeader("Host");

        StringBuilder googleAdUrlStr = new StringBuilder(PAGEAD);
        googleAdUrlStr.append("ad_type=text_image");
        googleAdUrlStr.append("&channel=");
        googleAdUrlStr.append(channel);
        googleAdUrlStr.append("&client=ca-mb-");
        googleAdUrlStr.append(pub_id);
        googleAdUrlStr.append("&dt=").append(googleDt);
        googleAdUrlStr.append("&format=mobile_single");
        googleAppendUrl(googleAdUrlStr, "host", googleHost);
        googleAppendUrl(googleAdUrlStr, "ip", RequestUtils.getRemoteAddr(req));
        googleAdUrlStr.append("&markup=xhtml");
        googleAdUrlStr.append("&oe=utf8");
        googleAdUrlStr.append("&output=xhtml");
        googleAppendUrl(googleAdUrlStr, "ref", req.getHeader("Referer"));
        String googleUrl = req.getRequestURL().toString();
        if (req.getQueryString() != null) {
            googleUrl += "?" + req.getQueryString().toString();
        }
        googleAppendUrl(googleAdUrlStr, "url", googleUrl);
        googleAppendUrl(googleAdUrlStr, "useragent", req
                .getHeader("User-Agent"));
        googleAppendScreenRes(googleAdUrlStr, req.getHeader("UA-pixels"), req
                .getHeader("x-up-devcap-screenpixels"));
        googleAppendDcmguid(googleAdUrlStr, req.getHeader("X-DCMGUID"));

        StringBuilder html = new StringBuilder();
        URL googleAdUrl = new URL(googleAdUrlStr.toString());
        BufferedReader reader = new BufferedReader(new InputStreamReader(
                googleAdUrl.openStream(), "UTF-8"));
        for (String line; (line = reader.readLine()) != null;) {
            html.append(line);
        }

        return html.toString();
    }

}

标签：Google,AdSense,广告,URL,BufferedReader