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[英]getObject operation returning metadata instead of object content from GCP in camel-spring boot application
[英]Reading a blob object (image) from google cloud storage is returning null in camel - spring boot application
我正在使用 spring 启动应用程序中的 apache 骆驼从谷歌云存储读取文件。 text/plain 类型文件的内容成功返回,但图像文件不返回任何内容,并且它们的内容类型在打印时返回 null。
java 代码(处理器):
package processors;
import java.io.FileInputStream;
import java.util.ArrayList;
import java.util.Base64;
import java.util.HashMap;
import java.util.List;
import org.apache.camel.Exchange;
import org.apache.camel.Processor;
import com.google.api.gax.paging.Page;
import com.google.api.services.storage.Storage.Buckets;
import com.google.auth.Credentials;
import com.google.auth.oauth2.GoogleCredentials;
import com.google.cloud.storage.Blob;
import com.google.cloud.storage.Storage;
import com.google.cloud.storage.StorageOptions;
public class ListObjFromGCPProcessor implements Processor{
public void process(Exchange xchg) throws Exception {
//Storage storage = StorageOptions.getDefaultInstance().getService();
Credentials credentials = GoogleCredentials.fromStream(new FileInputStream("D:/Users/User/MyFiles/Apache Camel github/SagesseMobileAppAPIs/camel-SagesseMobApp/src/main/resources/gcp-credentials.json"));
Storage storage = StorageOptions.newBuilder().setCredentials(credentials).build().getService();
Page<Blob> blobs = storage.list("sagessapp_test");
String name = "kitten.png";
for (Blob blob: blobs.getValues()) {
if (name.equals(blob.getName())) {
byte[] content= blob.getContent();
xchg.getIn().setBody(content);
System.out.println(Base64.getEncoder().encodeToString(content));
System.out.println(blob.getContentType());
}
}
}
}
文件 (kitten.png) 以 0 字节大小出现在图像上。
验证文件存在且内容不是 null 后,您需要将其从二进制格式化为 base64。
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