使用HttpClient将照片上传到Facebook [英] Upload Photo to Facebook with HttpClient

问题描述

我正在尝试使用以下代码使用Graph API将照片上传到Facebook。我一直收到错误请求，但不确定原因。我可以使用相同参数的curl上传照片。我正在使用Java和HttpClient。

I am attempting to use the following code to upload a photo to Facebook using the Graph API. I keep getting "Bad Request" but not sure why. I can upload the photo just fine using curl with the same parameters. I'm using Java with HttpClient.

    PostMethod filePost = new PostMethod('https://graph.facebook.com/me/photos');
    filePost.setParameter('access_token', 'my-access-token')
    filePost.setParameter('message', 'test image')

    filePost.getParams().setBooleanParameter(HttpMethodParams.USE_EXPECT_CONTINUE, false);
    try {
      println("Uploading " + file.getName() + " to 'https://graph.facebook.com/me/photos'");
      Part[] parts = [new FilePart('source', file.getName(), file)]
      filePost.setRequestEntity(new MultipartRequestEntity(parts, filePost.getParams()));
      HttpClient client = new HttpClient();
      client.getHttpConnectionManager().getParams().setConnectionTimeout(5000);
      int status = client.executeMethod(filePost);
      if (status == HttpStatus.SC_OK) {
        println(
                "Upload complete, response=" + filePost.getResponseBodyAsString()
        );
      } else {
        println(
                "Upload failed, response=" + HttpStatus.getStatusText(status)
        );
      }
    } catch (Exception ex) {
      println("ERROR: " + ex.getClass().getName() + " " + ex.getMessage());
      ex.printStackTrace();
    } finally {
      filePost.releaseConnection();
    }

更新：更多信息。我从响应中获取了更多信息，我得到了这个：

UPDATE: More to this. I grabbed some more info out the response and I am getting this:

{error：{type：OAuthException，message：有效访问令牌必须用于查询有关当前用户的信息。}}

{"error":{"type":"OAuthException","message":"An active access token must be used to query information about the current user."}}

但这似乎不对，因为我正在使用facebook发回的访问令牌授权过程后给我。

But that doesn't seem right as I'm using the access token that facebook gives back to me after the authorize process.

工作卷曲代码：

curl -F 'access_token=my-access-token' -F 'source=@/path/to/image.jpg' -F 'message=Some caption' https://graph.facebook.com/me/photos

推荐答案

我解决了这个问题。我没有将params添加到PostMethod，而是需要将access_token和消息添加到Part []数组中。完整代码：

I solved the problem. Instead of adding the params to the PostMethod, I needed to add the access_token and message to the Part[] array. Full code:

    PostMethod filePost = new PostMethod('https://graph.facebook.com/me/photos');
    filePost.getParams().setBooleanParameter(HttpMethodParams.USE_EXPECT_CONTINUE, false);
    try {
      println("Uploading " + file.getName() + " to 'https://graph.facebook.com/me/photos'");
      Part[] parts = [new FilePart('source', file.getName(), file), new StringPart('access_token', "${facebookData.access_token}"), new StringPart('message', 'some message')]
      filePost.setRequestEntity(new MultipartRequestEntity(parts, filePost.getParams()));
      HttpClient client = new HttpClient();
      client.getHttpConnectionManager().getParams().setConnectionTimeout(5000);
      int status = client.executeMethod(filePost);
      if (status == HttpStatus.SC_OK) {
        println("Upload complete, response=" + filePost.getResponseBodyAsString());
      } else {
        println("Upload failed, response=" + HttpStatus.getStatusText(status));
        // Create response
        StringBuilder notificationsSendResponse = new StringBuilder();
        byte[] byteArrayNotifications = new byte[4096];
        for (int n; (n = filePost.getResponseBodyAsStream().read(byteArrayNotifications)) != -1;) {
          notificationsSendResponse.append(new String(byteArrayNotifications, 0, n));
        }
        String notificationInfo = notificationsSendResponse.toString();
      }
    } catch (Exception ex) {
      println("ERROR: " + ex.getClass().getName() + " " + ex.getMessage());
      ex.printStackTrace();
    } finally {
      filePost.releaseConnection();
    }

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