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/*
* MinIO Java SDK for Amazon S3 Compatible Cloud Storage, (C) 2020 MinIO, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import io.minio.MinioClient;
import io.minio.PostPolicy;
import io.minio.errors.MinioException;
import java.io.File;
import java.io.IOException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.time.ZonedDateTime;
import java.util.Map;
import okhttp3.MultipartBody;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.RequestBody;
import okhttp3.Response;
public class GetPresignedPostFormData {
/** MinioClient.presignedPostPolicy() example. */
public static void main(String[] args)
throws IOException, NoSuchAlgorithmException, InvalidKeyException {
try {
/* play.min.io for test and development. */
MinioClient minioClient =
MinioClient.builder()
.endpoint("https://play.min.io")
.credentials("Q3AM3UQ867SPQQA43P2F", "zuf+tfteSlswRu7BJ86wekitnifILbZam1KYY3TG")
.build();
/* Amazon S3: */
// MinioClient minioClient =
// MinioClient.builder()
// .endpoint("https://s3.amazonaws.com")
// .credentials("YOUR-ACCESSKEY", "YOUR-SECRETACCESSKEY")
// .build();
// Create new post policy for 'my-bucketname' with 7 days expiry from now.
PostPolicy policy = new PostPolicy("my-bucketname", ZonedDateTime.now().plusDays(7));
// Add condition that 'key' (object name) equals to 'my-objectname'.
policy.addEqualsCondition("key", "my-objectname");
// Add condition that 'Content-Type' starts with 'image/'.
policy.addStartsWithCondition("Content-Type", "image/");
// Add condition that 'content-length-range' is between 64kiB to 10MiB.
policy.addContentLengthRangeCondition(64 * 1024, 10 * 1024 * 1024);
Map<String, String> formData = minioClient.getPresignedPostFormData(policy);
// Upload an image using POST object with form-data.
MultipartBody.Builder multipartBuilder = new MultipartBody.Builder();
multipartBuilder.setType(MultipartBody.FORM);
for (Map.Entry<String, String> entry : formData.entrySet()) {
multipartBuilder.addFormDataPart(entry.getKey(), entry.getValue());
}
multipartBuilder.addFormDataPart("key", "my-objectname");
multipartBuilder.addFormDataPart("Content-Type", "image/png");
// "file" must be added at last.
multipartBuilder.addFormDataPart(
"file", "my-objectname", RequestBody.create(new File("Pictures/avatar.png"), null));
Request request =
new Request.Builder()
.url("https://play.min.io/my-bucketname")
.post(multipartBuilder.build())
.build();
OkHttpClient httpClient = new OkHttpClient().newBuilder().build();
Response response = httpClient.newCall(request).execute();
if (response.isSuccessful()) {
System.out.println("Pictures/avatar.png is uploaded successfully using POST object");
} else {
System.out.println("Failed to upload Pictures/avatar.png");
}
// Print curl command usage to upload file /tmp/userpic.jpg.
System.out.print("curl -X POST ");
for (Map.Entry<String, String> entry : formData.entrySet()) {
System.out.print(" -F " + entry.getKey() + "=" + entry.getValue());
}
System.out.print(" -F key=my-objectname -F Content-Type=image/jpg");
System.out.println(" -F file=@/tmp/userpic.jpg https://play.min.io/my-bucketname");
} catch (MinioException e) {
System.out.println("Error occurred: " + e);
}
}
}