Java 使用REST从s3存储桶下载文件
我正试图通过REST调用从s3存储桶下载。我可以创建bucket、删除bucket和列出bucket。下载总是以找不到对象或HTTP响应代码403结束。代码如下。还有人知道amazon was sdk是否可以用于非amazon站点吗Java 使用REST从s3存储桶下载文件,java,rest,amazon-s3,Java,Rest,Amazon S3,我正试图通过REST调用从s3存储桶下载。我可以创建bucket、删除bucket和列出bucket。下载总是以找不到对象或HTTP响应代码403结束。代码如下。还有人知道amazon was sdk是否可以用于非amazon站点吗 public void getObject() throws Exception { String fmt = "EEE, dd MMM yyyy HH:mm:ss "; SimpleDateFormat df = new SimpleDateFormat(
public void getObject() throws Exception
{
String fmt = "EEE, dd MMM yyyy HH:mm:ss ";
SimpleDateFormat df = new SimpleDateFormat(fmt, Locale.US);
df.setTimeZone(TimeZone.getTimeZone("GMT"));
String ob2 = "/bucket/test.txt";
String bucket = "/bucket";
String method = "GET";
String contentMD5 = "";
String contentType = "";
String date = df.format(new Date()) + "GMT";
// Generate signature
StringBuffer buf = new StringBuffer();
buf.append(method).append("\n");
buf.append(contentMD5).append("\n");
buf.append(contentType).append("\n");
buf.append(date).append("\n");
buf.append(ob2);
String signature = sign(buf.toString());
HttpURLConnection httpConn = null;
URL url = new URL("https”,”s3demo.s3demosite.com",443,bucket);
httpConn = (HttpURLConnection) url.openConnection();
httpConn.setDoInput(true);
httpConn.setDoOutput(true);
httpConn.setUseCaches(false);
httpConn.setDefaultUseCaches(false);
httpConn.setAllowUserInteraction(true);
httpConn.setRequestMethod(method);
httpConn.setRequestProperty("Date", date);
httpConn.setRequestProperty("Content-Length", "0");
String AWSAuth = "AWS " + keyId + ":" + signature;
httpConn.setRequestProperty("Authorization", AWSAuth);
// Send the HTTP PUT request.
int statusCode = httpConn.getResponseCode();
InputStream err = httpConn.getErrorStream();
InputStream is = null;
is = httpConn.getInputStream();
int ch;
StringBuffer sb = new StringBuffer();
while ((ch = err.read()) != -1) {
sb.append((char) ch);
}
if ((statusCode/100) != 2)
{
// Deal with S3 error stream.
InputStream in = httpConn.getErrorStream();
System.out.println("Error: "+errorStr);
}
else
{
System.out.println("download worked”);
}
}
您没有使用的原因是什么?我没有连接到Amazon服务器。也不确定它是否会起作用。您知道它是否与其他s3服务器兼容吗?这取决于您使用的s3兼容工具。您提供的信息无法确定它的服务器或客户端问题。