me.chanjar.weixin.common.util.http.WxDnsResolver Maven / Gradle / Ivy
package me.chanjar.weixin.common.util.http;
import org.apache.http.conn.DnsResolver;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.HashMap;
import java.util.Map;
/**
* 微信DNS域名解析器，将微信域名绑定到指定IP
* --------------------------------------------
* 适用于服务器端调用微信服务器需要开通出口防火墙情况
*
* Created by Andy Huo on 17/03/28.
*/
public class WxDnsResolver implements DnsResolver {
private static final String WECHAT_API_URL = "api.weixin.qq.com";
private static Map MAPPINGS = new HashMap<>();
protected final Logger log = LoggerFactory.getLogger(WxDnsResolver.class);
private String wxApiIp;
public WxDnsResolver(String ip) {
this.wxApiIp = ip;
this.init();
}
private void init() {
if (log.isDebugEnabled()) {
log.debug("init wechat dns config with ip {}", wxApiIp);
}
try {
MAPPINGS.put(WECHAT_API_URL, new InetAddress[]{InetAddress.getByName(wxApiIp)});
} catch (UnknownHostException e) {
//如果初始化DNS配置失败则使用默认配置,不影响服务的启动
log.error("init WxDnsResolver error", e);
MAPPINGS = new HashMap<>();
}
}
@Override
public InetAddress[] resolve(String host) throws UnknownHostException {
return MAPPINGS.containsKey(host) ? MAPPINGS.get(host) : new InetAddress[0];
}
public String getWxApiIp() {
return wxApiIp;
}
public void setWxApiIp(String wxApiIp) {
this.wxApiIp = wxApiIp;
this.init();
}
}