issue #5 生成带参数的二维码 - showcode

src/main/java/chanjarster/weixin/api/WxService.java

@@ -294,6 +294,17 @@ public interface WxService {
    */
   public WxQrCodeTicket qrCodeCreateLastTicket(int scene_id) throws WxErrorException;
 
+  /**
+   * <pre>
+   * 换取二维码图片
+   * 详情请见: http://mp.weixin.qq.com/wiki/index.php?title=生成带参数的二维码
+   * </pre>
+   * @param ticket    二维码ticket
+   * @return
+   * @throws WxErrorException
+   */
+  public File qrCodePicture(WxQrCodeTicket ticket) throws WxErrorException;
+
   /**
    * 注入 {@link WxConfigStorage} 的实现
    * @param wxConfigProvider

src/main/java/chanjarster/weixin/api/WxServiceImpl.java

@@ -35,9 +35,10 @@ import chanjarster.weixin.bean.result.WxQrCodeTicket;
 import chanjarster.weixin.bean.result.WxUser;
 import chanjarster.weixin.bean.result.WxUserList;
 import chanjarster.weixin.exception.WxErrorException;
-import chanjarster.weixin.util.fs.FileUtil;
+import chanjarster.weixin.util.fs.FileUtils;
 import chanjarster.weixin.util.http.MediaDownloadRequestExecutor;
 import chanjarster.weixin.util.http.MediaUploadRequestExecutor;
+import chanjarster.weixin.util.http.QrCodeRequestExecutor;
 import chanjarster.weixin.util.http.RequestExecutor;
 import chanjarster.weixin.util.http.SimpleGetRequestExecutor;
 import chanjarster.weixin.util.http.SimplePostRequestExecutor;
@@ -161,7 +162,7 @@ public class WxServiceImpl implements WxService {
   }
 
   public WxMediaUploadResult mediaUpload(String mediaType, String fileType, InputStream inputStream) throws WxErrorException, IOException {
-    return mediaUpload(mediaType,FileUtil.createTmpFile(inputStream, UUID.randomUUID().toString(), fileType));
+    return mediaUpload(mediaType,FileUtils.createTmpFile(inputStream, UUID.randomUUID().toString(), fileType));
   }
   
   public WxMediaUploadResult mediaUpload(String mediaType, File file) throws WxErrorException {
@@ -293,6 +294,11 @@ public class WxServiceImpl implements WxService {
     return WxQrCodeTicket.fromJson(responseContent);
   }
   
+  public File qrCodePicture(WxQrCodeTicket ticket) throws WxErrorException {
+    String url = "https://mp.weixin.qq.com/cgi-bin/showqrcode";
+    return execute(new QrCodeRequestExecutor(), url, ticket);
+  }
+  
   /**
    * 向微信端发送请求，在这里执行的策略是当发生access_token过期时才去刷新，然后重新执行请求，而不是全局定时请求
    * @param executor

src/main/java/chanjarster/weixin/util/fs/FileUtils.java

@@ -5,7 +5,7 @@ import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
 
-public class FileUtil {
+public class FileUtils {
 
   /**
    * 创建临时文件

src/main/java/chanjarster/weixin/util/http/MediaDownloadRequestExecutor.java

@@ -15,10 +15,10 @@ import org.apache.http.entity.ContentType;
 
 import chanjarster.weixin.bean.result.WxError;
 import chanjarster.weixin.exception.WxErrorException;
-import chanjarster.weixin.util.fs.FileUtil;
+import chanjarster.weixin.util.fs.FileUtils;
 
 /**
- * 下载媒体文件请求执行器，请求的参数是String, 返回的结果是String
+ * 下载媒体文件请求执行器，请求的参数是String, 返回的结果是File
  * @author chanjarster
  *
  */
@@ -52,7 +52,7 @@ public class MediaDownloadRequestExecutor implements RequestExecutor<File, Strin
       return null;
     }
     String[] name_ext = fileName.split("\\.");
-    File localFile = FileUtil.createTmpFile(inputStream, name_ext[0], name_ext[1]);
+    File localFile = FileUtils.createTmpFile(inputStream, name_ext[0], name_ext[1]);
     return localFile;
   }
 

src/main/java/chanjarster/weixin/util/http/QrCodeRequestExecutor.java

@@ -0,0 +1,56 @@
+package chanjarster.weixin.util.http;
+
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.URLEncoder;
+import java.util.UUID;
+
+import org.apache.http.Header;
+import org.apache.http.client.ClientProtocolException;
+import org.apache.http.client.methods.CloseableHttpResponse;
+import org.apache.http.client.methods.HttpGet;
+import org.apache.http.entity.ContentType;
+
+import chanjarster.weixin.bean.result.WxError;
+import chanjarster.weixin.bean.result.WxQrCodeTicket;
+import chanjarster.weixin.exception.WxErrorException;
+import chanjarster.weixin.util.fs.FileUtils;
+
+/**
+ * 获得QrCode图片 请求执行器
+ * @author chanjarster
+ *
+ */
+public class QrCodeRequestExecutor implements RequestExecutor<File, WxQrCodeTicket> {
+
+  @Override
+  public File execute(String uri, WxQrCodeTicket ticket) throws WxErrorException, ClientProtocolException, IOException {
+    if (ticket != null) {
+      if (uri.indexOf('?') == -1) {
+        uri += '?';
+      }
+      uri += uri.endsWith("?") ? 
+          "ticket=" + URLEncoder.encode(ticket.getTicket(), "UTF-8") 
+          : 
+          "&ticket=" + URLEncoder.encode(ticket.getTicket(), "UTF-8");
+    }
+    
+    HttpGet httpGet = new HttpGet(uri);
+    CloseableHttpResponse response = httpclient.execute(httpGet);
+
+    Header[] contentTypeHeader = response.getHeaders("Content-Type");
+    if (contentTypeHeader != null && contentTypeHeader.length > 0) {
+      // 出错
+      if (ContentType.TEXT_PLAIN.getMimeType().equals(contentTypeHeader[0].getValue())) {
+        String responseContent = Utf8ResponseHandler.INSTANCE.handleResponse(response);
+        throw new WxErrorException(WxError.fromJson(responseContent));
+      }
+    }
+    InputStream inputStream = InputStreamResponseHandler.INSTANCE.handleResponse(response);
+    
+    File localFile = FileUtils.createTmpFile(inputStream, UUID.randomUUID().toString(), "jpg");
+    return localFile;
+  }
+
+}

src/test/java/chanjarster/weixin/api/WxQrCodeAPITest.java

@@ -1,5 +1,6 @@
 package chanjarster.weixin.api;
 
+import java.io.File;
 
 import org.testng.Assert;
 import org.testng.annotations.Guice;
@@ -12,8 +13,8 @@ import com.google.inject.Inject;
 
 /**
  * 测试用户相关的接口
- * @author chanjarster
  * 
+ * @author chanjarster
  */
 @Test(groups = "qrCodeAPI", dependsOnGroups = { "baseAPI" })
 @Guice(modules = ApiTestModule.class)
@@ -36,4 +37,10 @@ public class WxQrCodeAPITest {
     Assert.assertTrue(ticket.getExpire_seconds() == -1);
   }
 
+  public void testQrCodePicture() throws WxErrorException {
+    WxQrCodeTicket ticket = wxService.qrCodeCreateLastTicket(1);
+    File file = wxService.qrCodePicture(ticket);
+    Assert.assertNotNull(file);
+  }
+
 }