Implement mediaCheckAsync.

weixin4j-wxa/src/main/java/com/foxinmy/weixin4j/wxa/api/SecCheckApi.java

@@ -95,4 +95,22 @@ public class SecCheckApi extends TokenManagerApi {
 		r.checkErrCode();
 	}
 
+	/**
+	 * 异步校验图片/音频是否含有违法违规内容。
+	 *
+	 * @param mediaUrl 要检测的多媒体 URL
+	 * @param mediaType {@code 1}: 音频; {@code 2}: 图片
+	 * @return 任务 ID，用于匹配异步推送结果
+	 * @throws WeixinException indicates getting access token failed.
+	 * @see <a href="https://developers.weixin.qq.com/miniprogram/dev/api-backend/open-api/sec-check/security.mediaCheckAsync.html">security.mediaCheckAsync</a>
+	 */
+	public String mediaCheckAsync(String mediaUrl, int mediaType) throws WeixinException {
+		final Map<String, Object> params = new HashMap<String, Object>(2);
+		params.put("media_url", mediaUrl);
+		params.put("media_type", mediaType);
+		final WxaApiAsyncResult r = this.post("wxa_media_check_async", params, WxaApiAsyncResult.TYPE_REFERENCE);
+		r.checkErrCode();
+		return r.getTraceId();
+	}
+
 }

weixin4j-wxa/src/main/java/com/foxinmy/weixin4j/wxa/api/WxaApiAsyncResult.java

@@ -0,0 +1,26 @@
+package com.foxinmy.weixin4j.wxa.api;
+
+import com.alibaba.fastjson.TypeReference;
+
+class WxaApiAsyncResult extends WxaApiResult {
+
+	private static final long serialVersionUID = 2020022001L;
+
+	public static final TypeReference<WxaApiAsyncResult> TYPE_REFERENCE
+		= new TypeReference<WxaApiAsyncResult>() {
+		};
+
+	private String traceId;
+
+	public WxaApiAsyncResult() {
+	}
+
+	public String getTraceId() {
+		return traceId;
+	}
+
+	public void setTraceId(String traceId) {
+		this.traceId = traceId;
+	}
+
+}

weixin4j-wxa/src/main/resources/com/foxinmy/weixin4j/wxa/api/weixin.properties

@@ -50,5 +50,8 @@ message_custom_typing={api_cgi_url}/message/custom/typing?access_token=%s
 # imgSecCheck
 wxa_img_sec_check={api_wxa_url}/img_sec_check?access_token=%s
 
+# mediaCheckAsync
+wxa_media_check_async={api_wxa_url}/media_check_async?access_token=%s
+
 # msgSecCheck
 wxa_msg_sec_check={api_wxa_url}/msg_sec_check?access_token=%s