阿里云CDN刷新预热接口

package com.lwj.util.aliyuncdn; import java.io.IOException; import java.io.UnsupportedEncodingException; import java.net.URLEncoder; import java.nio.charset.Charset; import java.security.NoSuchAlgorithmException; import java.text.SimpleDateFormat; import java.util.Comparator; import java.util.Date; import java.util.Iterator; import java.util.Map; import java.util.Map.Entry; import java.util.SimpleTimeZone; import java.util.TreeMap; import javax.crypto.Mac; import javax.crypto.SecretKey; import javax.crypto.spec.SecretKeySpec; import org.apache.http.HttpEntity; import org.apache.http.HttpResponse; import org.apache.http.client.ClientProtocolException; import org.apache.http.client.HttpClient; import org.apache.http.client.methods.HttpGet; import org.apache.http.impl.client.HttpClients; import org.apache.http.util.EntityUtils; import com.lwj.util.aliyunoss.AliyunOssServerInfo; import sun.misc.BASE64Encoder; /** * * @Description :阿里云OSS服务器CDN刷新缓存 * @author : liwenjian * @version : 1.0 * @Date : 2016年8月22日 上午9:37:47 */ public class AliyunCdnUtils { private static final String cdn_server_address = "https://cdn.aliyuncs.com"; /** * 刷新缓存 * * @param objectPath * @return */ public static String refreshObjectCaches(String objectPath) { // Map<String, String> param = new TreeMap<String, String>(); // param.put("Action", "RefreshObjectCaches"); // param.put("ObjectPath", // "http://b1.goimg.cn/test/images/1471590829296.png"); // param.put("ObjectType", "File"); AliyunCdnUtils cdn = new AliyunCdnUtils(); Map<String, String> param = new TreeMap<String, String>(); param.put("Action", "RefreshObjectCaches"); param.put("ObjectPath", objectPath); param.put("ObjectType", "File"); String url = cdn.compose_url(param); System.out.println("Aliyun CDN RefreshObjectCaches Request Url:" + url); HttpClient client = HttpClients.createDefault(); HttpGet httpGet = new HttpGet(url); try { HttpResponse response = client.execute(httpGet); HttpEntity entity = response.getEntity(); return EntityUtils.toString(entity, Charset.forName("UTF-8")); } catch (ClientProtocolException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } return null; } /** * 组合请求路径 * * @param user_params * @return */ private String compose_url(Map<String, String> user_params) { // 请求的时间戳。日期格式按照ISO8601标准表示，并需要使用UTC时间。格式为：YYYY-MM-DDThh:mm:ssZ。 // 例如，2014-11-11T12:00:00Z（为北京时间2014年11月11日20点0分0秒） SimpleDateFormat sdf = new SimpleDateFormat("YYYY-MM-dd'T'hh:mm:ss'Z'"); sdf.setTimeZone(new SimpleTimeZone(0, "GMT")); String timestamp = sdf.format(new Date()); Map<String, String> parameters = new TreeMap<String, String>(); parameters.put("Format", "JSON"); parameters.put("Version", "2014-11-11"); parameters.put("AccessKeyId", AliyunOssServerInfo.getAccessKeyId().trim()); parameters.put("SignatureVersion", "1.0"); parameters.put("SignatureMethod", "HMAC-SHA1"); parameters.put("SignatureNonce", String.valueOf(System.currentTimeMillis())); parameters.put("TimeStamp", timestamp); // 添加用户请求参数到签名map中 Iterator<Entry<String, String>> iterator = user_params.entrySet().iterator(); while (iterator.hasNext()) { Entry<String, String> entry = iterator.next(); parameters.put(entry.getKey(), entry.getValue()); } String signature = compute_signature(parameters, AliyunOssServerInfo.getAccessKeySecret()); parameters.put("Signature", signature); return cdn_server_address + "/?" + map_to_url(parameters); } /** * 计算签名 * * @param parameters * @param access_key_secret * @return * @throws UnsupportedEncodingException * @throws NoSuchAlgorithmException */ private String compute_signature(Map<String, String> parameters, String access_key_secret) { try { StringBuilder canonicalizedQueryString = new StringBuilder(); // 调用Map进行字典排序 parameters = sortMap(parameters); // 一、按照参数名称的字典顺序对请求中所有的请求参数（包括文档中描述的“公共请求参数”和给定了的请求接口的自定义参数，但不能包括“公共请求参数”中提到Signature参数本身）进行排序。 // 遍历组合组合签名 Iterator<Entry<String, String>> iterator = parameters.entrySet().iterator(); while (iterator.hasNext()) { Entry<String, String> entry = iterator.next(); // 对Map键值对进行URL编码 // 二、对每个请求参数的名称和值进行编码。名称和值要使用UTF-8字符集进行URL编码，URL编码的编码规则是： // (1)对于字符 A-Z、a-z、0-9以及字符“-”、“_”、“.”、“~”不编码; // (2)对于其他字符编码成“%XY”的格式，其中XY是字符对应ASCII码的16进制表示。比如英文的双引号（”）对应的编码就是%22 // (3)对于扩展的UTF-8字符，编码成“%XY%ZA…”的格式； // (4)需要说明的是英文空格（ ）要被编码是%20，而不是加号（+）。 canonicalizedQueryString.append("&").append(percent_encode(entry.getKey())).append("=") .append(percent_encode(entry.getValue())); } // 三、调用percent_encode方法把编码后的字符串中加号（+）替换成%20、星号（*）替换成%2A、%7E替换回波浪号（~） String stringToSign = "GET&%2F&" + percent_encode(canonicalizedQueryString.toString().substring(1).trim()); // 按照RFC2104的定义，使用上面的用于签名的字符串计算签名HMAC值。注意：计算签名时使用的Key就是用户持有的Access // Key Secret并加上一个“&”字符(ASCII:38)，使用的哈希算法是SHA1 String key = AliyunOssServerInfo.getAccessKeySecret() + "&"; SecretKey secretKey = new SecretKeySpec(key.getBytes(), "HmacSHA1"); Mac mac = Mac.getInstance("HmacSHA1"); mac.init(secretKey); byte[] sign = mac.doFinal(stringToSign.getBytes()); System.out.println("stringToSign:" + stringToSign); // 得到签名 String signature = (new BASE64Encoder()).encode(sign); System.out.println("signature:" + signature); return percent_encode(signature); } catch (Exception e) { e.printStackTrace(); } return null; } /** * map转为请求URL * * @param parameters * @return */ private String map_to_url(Map<String, String> parameters) { try { parameters = sortMap(parameters); StringBuilder url = new StringBuilder(); Iterator<Entry<String, String>> iterator = parameters.entrySet().iterator(); while (iterator.hasNext()) { Entry<String, String> entry = iterator.next(); url.append("&").append(entry.getKey()).append("=").append(entry.getValue()); } return url.toString().substring(1); } catch (Exception e) { e.printStackTrace(); } return null; } /** * 转换特殊字符 * * @param param * @return */ private String percent_encode(String param) { try { // 名称和值要使用UTF-8字符集进行URL编码 param = URLEncoder.encode(param, "UTF-8"); param = param.replaceAll("\\+", "%20"); param = param.replaceAll("\\*", "%2A"); param = param.replaceAll("%7E", "~"); return param; } catch (Exception e) { e.printStackTrace(); } return null; } /** * Map排序 * * @param parameters * @return */ private Map<String, String> sortMap(Map<String, String> parameters) { if (parameters.isEmpty()) { return null; } // 按字典排序 Map<String, String> sortMap = new TreeMap<String, String>(new Comparator<String>() { @Override public int compare(String o1, String o2) { // 指定排序器按照降序排列 // return o2.compareTo(o1); // 指定排序器按照升序序排列 return o1.compareTo(o2); } }); sortMap.putAll(parameters); return sortMap; } public static void main(String[] args) { AliyunCdnUtils a = new AliyunCdnUtils(); Map<String, String> param = new TreeMap<String, String>(); param.put("Action", "RefreshObjectCaches"); param.put("ObjectPath", "http://b1.goimg.cn/test/images/1471590829296.png"); param.put("ObjectType", "File"); String url = a.compose_url(param); System.out.println("request url:" + url); HttpClient client = HttpClients.createDefault(); HttpGet httpgets = new HttpGet(url); try { HttpResponse response = client.execute(httpgets); HttpEntity entity = response.getEntity(); System.out.println(EntityUtils.toString(entity, Charset.forName("UTF-8"))); } catch (ClientProtocolException e) { // TODO Auto-generated catch block  e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block  e.printStackTrace(); } } }