如何在android中使用来自aws S3服务器的presignedurl上传图像答案

【问题标题】：How to upload image using presignedurl from aws S3 server in android如何在android中使用来自aws S3服务器的presignedurl上传图像
【发布时间】：2015-07-25 10:41:28
【问题描述】：

我正在尝试从预签名的 url 将图像上传到 S3 存储桶，它给出了 ssl 异常错误连接被对等方关闭

这是我的代码

public int upload(String filePath, URL url) {
 Bitmap bm = BitmapFactory.decodeFile(filePath);
            ByteArrayOutputStream bos = new ByteArrayOutputStream();
            bm.compress(Bitmap.CompressFormat.JPEG, 90, bos);
            byte[] fileBytes = bos.toByteArray();

            connection = (HttpURLConnection) url.openConnection();

            connection.setDoOutput(true);
            connection.setRequestMethod("PUT");
            connection.setRequestProperty("Connection", "Keep-Alive");
            connection.setRequestProperty("Content-Type", "application/octet-stream"); 

            OutputStream output = connection.getOutputStream();
            InputStream input = new ByteArrayInputStream(fileBytes);
            byte[] buffer = new byte[4096];
            int length;
            while ((length = input.read(buffer)) > 0) {
                output.write(buffer, 0, length);
            }
            output.flush();

            return connection.getResponseCode();
}

【问题讨论】：

标签： android amazon-s3 httpurlconnection

【解决方案1】：

终于想通了这是使用预签名 URL 将图像发送到 S3 的代码

try {

            Bitmap bm = BitmapFactory.decodeFile(fileBytes);
            connection = (HttpsURLConnection) url.openConnection();
            connection.setDoOutput(true);
            connection.setRequestMethod("PUT");
            connection.setRequestProperty("Content-Type", "application/octet-stream"); // Very important ! It won't work without adding this!

            OutputStream output = connection.getOutputStream();


            ByteArrayOutputStream bos = new ByteArrayOutputStream();
            bm.compress(Bitmap.CompressFormat.JPEG, 50, output);
            output.flush();

            int response = connection.getResponseCode();

            return connection.getResponseCode();
        } catch (IOException e) {
            e.printStackTrace();
        }

【讨论】：