How can convert inputstream to InputStreamsource or Datasource to attach in Spring JavaMail

Question

I am getting inputstream from the Jsch channelSFTP like below.

   ChannelSftp channelSftp = (ChannelSftp) channel;
   InputStream input = channelsftp.get(unixPath); // unixPath is path to my file which is on SFTP server

I have to attach the file in the unixPath in the Spring JavaMail attachment. But when I see API of Spring JavaMail addAttachment() method it takes only InputStreamSource or Datasource. My problem is I am not able to get the InputStreamSource or Datasource from the inputStream which I am getting form SFTP channel.

How Can I get InputStreamSource or Datasource from the above InputStream?

score 50 · Accepted Answer · answered Nov 05 '12 at 18:39

50

From the documentation, InputStreamSource is an interface. One of its implementations is InputStreamResource, which has a constructor that takes in an InputStream. Here is the JavaDoc for it.

You should be able to setup your call as such:

addAttachment("Not porn", new InputStreamResource(inputStream));

answered Nov 05 '12 at 18:39

nicholas.hauschild

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For me exactly message.addAttachment("somefile name",new ByteArrayResource(IOUtils.toByteArray(channelSftp.get(unixPath)))); is working.Thanks anyway for the idea. – SRy Nov 05 '12 at 19:03
6

Note that this method does not allow for an `inputStream` that is already open. – Erica Kane Feb 10 '15 at 20:02
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up for that awesome filename "not porn" – Daniel Bo Apr 10 '17 at 16:19
@SRy the method you showed worked perfectly for me. Thanks! – sunitkatkar Dec 01 '21 at 23:27

score 0 · Answer 2 · answered Sep 15 '22 at 11:07

I host a Spring Boot application in Docker on my VPS. This code will work on a local system whilst developing in an IDE as well as if the .JAR-file is wrapped in a Docker image:

Example case:

I like to get a PDF. The PDf document is located at static/docs/not-a-porn.PDF.

1.) Wire the class ResourceLoader.

private final ResourceLoader resourceLoader;

public MyService(@Autowired ResourceLoader resourceLoader) {  
    this.resourceLoader = resourceLoader;
}

2.) Create a resource by pathOfAttachment (String).

String pathOfAttachment = "classpath:static/docs/not-a-porn.PDF"
Resource resource = this.resourceLoader.getResource(pathOfAttachment);

Resource is an interface that extends InputStreamSource as you can see in the documentation:

public interface Resource extends InputStreamSource

Source: org.springframework.core.io Link to documentation (click here)

How can convert inputstream to InputStreamsource or Datasource to attach in Spring JavaMail

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