本文介绍 Post 表单预签名的示例代码。
import com.volcengine.tos.TOSV2; import com.volcengine.tos.TOSV2ClientBuilder; import com.volcengine.tos.TosClientException; import com.volcengine.tos.model.object.PreSignedPostSignatureInput; import com.volcengine.tos.model.object.PreSignedPostSignatureOutput; public class PreSignedPostSignatureExample { public static void main(String[] args) { String endpoint = "your endpoint"; String region = "your region"; String accessKey = System.getenv("TOS_ACCESS_KEY"); String secretKey = System.getenv("TOS_SECRET_KEY"); String bucketName = "bucket-example"; String objectKey = "example_dir/example_object.txt"; // 单位为秒，设置3600秒即1小时后过期 long expires = 3600; TOSV2 tos = new TOSV2ClientBuilder().build(region, endpoint, accessKey, secretKey); try{ PreSignedPostSignatureInput input = new PreSignedPostSignatureInput().setBucket(bucketName) .setKey(objectKey).setExpires(expires); PreSignedPostSignatureOutput output = tos.preSignedPostSignature(input); System.out.println("preSignedPostSignature succeed, the signature is " + output.getSignature()); System.out.println("the credential is " + output.getCredential()); System.out.println("the policy is " + output.getPolicy()); System.out.println("the date is " + output.getDate()); System.out.println("the algorithm is " + output.getAlgorithm()); System.out.println("the originPolicy is " + output.getOriginPolicy()); } catch (TosClientException e) { // 操作失败，捕获客户端异常，一般情况是请求参数错误，此时请求并未发送 System.out.println("preSignedPostSignature failed"); System.out.println("Message: " + e.getMessage()); if (e.getCause() != null) { e.getCause().printStackTrace(); } } catch (Throwable t) { // 作为兜底捕获其他异常，一般不会执行到这里 System.out.println("preSignedPostSignature failed"); System.out.println("unexpected exception, message: " + t.getMessage()); } } }
关于 POST 表单预签名的详细信息，请参见基于浏览器上传的表单中包含签名。