java - 在 Java 中的 SOAP over HTTP Web 服务中调用 Amazon S3 客户端时失败

Question

我有一个类，它将图像加载到亚马逊 S3 并返回该图像的公共(public) url。当我将该类作为 Java 应用程序运行时，一切正常。当我通过自上而下的方法创建 SOAP Web 服务并尝试在 Web 服务代码中调用该代码时，它失败了。我确切地知道它在哪里失败，但我不知道为什么，而且我无法调试它，不打印任何内容到控制台，尽管我正在 try catch 错误。

我收到java.lang.reflect.InitationTargetException。我搜索了这里和亚马逊论坛，找不到任何如何解决此问题的建议(我看到了很多有关此错误的问题，但没有解决方案)。

这是我的类，用于上传图像并获取 url，它可以很好地用作 Java 应用程序:

import java.io.File;
import java.net.URL;
import java.util.Calendar;
import java.util.Date;

import com.amazonaws.AmazonClientException;
import com.amazonaws.AmazonServiceException;
import com.amazonaws.HttpMethod;
import com.amazonaws.auth.AWSCredentials;
import com.amazonaws.auth.BasicAWSCredentials;
import com.amazonaws.services.s3.AmazonS3Client;
import com.amazonaws.services.s3.model.GeneratePresignedUrlRequest;
import com.amazonaws.services.s3.model.PutObjectRequest;

public class S3Uploader {
private String url = null;

public S3Uploader(String filePath){
    setUrl(s3uploadAndGetUrl(filePath));
}


public String getUrl() {
    return url;
}

public void setUrl(String url) {
    this.url = url;
}

public String s3uploadAndGetUrl(String file) {
    // get access to S3
    //TODO protect amazon credentials, refer to amazon documentation about proper way of providing credentials.
    String result = null;
    URL url;
    try {
        AWSCredentials awsCreds = new BasicAWSCredentials(
                "myCredentials",
                "myCredentials");
        System.out.println("Credentials loaded.");
        AmazonS3Client s3Client = new AmazonS3Client(awsCreds);
        System.out.println("Client created.");

        // image to upload
        File image = new File(file);

        // set expiration date of images' urls
        Calendar origDay = Calendar.getInstance();
        Calendar expirationDay = (Calendar) origDay.clone();
        expirationDay.add(Calendar.DAY_OF_YEAR, 30);
        Date expirationDate = expirationDay.getTime();

        // set bucket and images names
        String bucketName = s3Client.listBuckets().get(0).getName();
        String objectKey = image.getName();

        // upload image
        PutObjectRequest putObject = new PutObjectRequest(bucketName,
                objectKey, image);
        s3Client.putObject(putObject);

        // create and retrieve image url
        GeneratePresignedUrlRequest generatePresignedUrlRequest = new GeneratePresignedUrlRequest(
                bucketName, objectKey);
        generatePresignedUrlRequest.setMethod(HttpMethod.GET);
        generatePresignedUrlRequest.setExpiration(expirationDate);

        url = s3Client.generatePresignedUrl(generatePresignedUrlRequest);
        result = url.toString();

        System.out.println("Pre-Signed URL = " + url.toString());
        System.out.println();
    } catch (AmazonServiceException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
        result = e.getCause().getMessage();
    } catch (AmazonClientException e) {
        // TODO Auto-generated catch block
        System.out.println(e.getCause().getMessage());
        result = e.getCause().getMessage();
    }

    return result;
}

}

现在我调用此类的 Web 服务代码:

/**
* UrlsCreatorSOAPImpl.java
*
* This file was auto-generated from WSDL
* by the Apache Axis 1.4 Apr 22, 2006 (06:55:48 PDT) WSDL2Java emitter.
*/

public class UrlsCreatorSOAPImpl implements org.example.www.UrlsCreator.UrlsCreator_PortType{
public java.lang.String getImagesUrls(java.lang.String Url) throws java.rmi.RemoteException {

    S3Uploader upload = new S3Uploader("C:/Users/Maksym/Dropbox/Greece/Matala/IMG_20140508_134143.jpg");
    return upload.getUrl();

 }
}

这是唯一打印到控制台的内容:

INFO: Credentials loaded.

还有 SOAP 请求:

- <soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:q0="http://www.example.org/UrlsCreator/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
- <soapenv:Body>
 - <q0:GetImagesUrls>
    <Url>asdasdadsa</Url>
   </q0:GetImagesUrls>
 </soapenv:Body>
 </soapenv:Envelope>

和 SOAP 响应:

- <soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
- <soapenv:Body>
  - <soapenv:Fault>
    <faultcode>soapenv:Server.userException</faultcode> 
    <faultstring>java.lang.reflect.InvocationTargetException</faultstring> 
   - <detail>
     <ns1:hostname xmlns:ns1="http://xml.apache.org/axis/">Maksym-PC</ns1:hostname> 
   </detail>
  </soapenv:Fault>
 </soapenv:Body>
</soapenv:Envelope>

如果可以的话请提供帮助，如果我需要提供任何其他信息，请告诉我。提前致谢。

更新1:我2-3天前下载了java aws sdk，所以它应该是最新的。以下是 WEB-INF/lib 下的 jar 文件列表:

 aws-java-sdk-1.7.10-javadoc.jar
 aws-java-sdk-1.7.10.jar
 aws-java-sdk-flow-build-tools-1.7.10.jar
 axis.jar
 commons-codec-1.3.jar
 commons-discovery-0.2.jar
 commons-logging-1.1.1.jar
 commons-logging.jar
 httpclient-4.2.3.jar
 httpcore-4.2.jar
 jackson-annotations-2.1.1.jar
 jackson-core-2.1.1.jar
 jackson-databind-2.1.1.jar
 jaxrpc.jar
 joda-time-2.2.jar
 saaj.jar
 wsdl4j.jar

解决方案:事实证明 - 问题出在 glassfish 上，或者只是我的笔记本电脑上，我不知道。我在另一台笔记本电脑上从头开始尝试，使用相同的 eclipse 版本，相同的 glassfish 并且它有效，我仍然不知道我的笔记本电脑出了什么问题(其他网络服务运行顺利，清理项目和服务器也没有帮助)。

无论如何，感谢您的帮助=)

Answer 1

确保运行代码时使用的库 API 版本与开发/编译代码时使用的库 API 版本相同。对于远程 S3 API，请确保客户端的版本与服务器端的版本兼容。