How to use the Atom Abdera client to send content and attachments

Question

We use Abdera to interact with the IBM Connections API, but our problem is mainly related to Abdera himself.

I think that there is an error in Abdera that does not allow sending a record containing content and attachments in one request. As a workaround, you can probably send two separate requests to first create content and update it using an attachment. Unfortunately, the connection API requires that all data be in the same request or that your old data is not saved.

The following code shows an Abder entry:

ClassLoader classloader = Thread.currentThread().getContextClassLoader();
InputStream is = classloader.getResourceAsStream("google-trends.tiff");

final Abdera abdera = new Abdera();
Entry entry = abdera.getFactory().newEntry();
entry.setTitle("THIS IS THE TITLE");
entry.setContentAsHtml("<p>CONTENT AS HTML</p>");
entry.setPublished(new Date());

Category category = abdera.getFactory().newCategory();
category.setLabel("Entry");
category.setScheme("http://www.ibm.com/xmlns/prod/sn/type");
category.setTerm("entry");
entry.addCategory(category);

RequestEntity request =
    new MultipartRelatedRequestEntity(entry, is, "image/jpg",
        "asdfasdfasdf");

When a MultipartRelatedRequestEntity is created, NullPointer is called:

java.lang.NullPointerException
    at
org.apache.abdera.protocol.client.util.MultipartRelatedRequestEntity.writeInput(MultipartRelatedRequestEntity.java:74)

, "src", Abdera , . Abdera, ?

/**
 * <p>
 * RFC4287: atom:content MAY have a "src" attribute, whose value MUST be an IRI reference. If the "src" attribute is
 * present, atom:content MUST be empty. Atom Processors MAY use the IRI to retrieve the content and MAY choose to
 * ignore remote content or to present it in a different manner than local content.
 * </p>
 * <p>
 * If the "src" attribute is present, the "type" attribute SHOULD be provided and MUST be a MIME media type, rather
 * than "text", "html", or "xhtml".
 * </p>
 * 
 * @param src The IRI to use as the src attribute value for the content
 * @throws IRISyntaxException if the src value is malformed
 */

IBM Greenhouse Connections, , , . GitHub

Answer 1

Abdera, , , ( ) (). Part HttpClient:

  final Entry entry = this.createActivityEntry();
  final RequestOptions options = this.client.getDefaultRequestOptions();
  options.setHeader("Content-Type", "multipart/related;type=\"application/atom+xml\"");

  StringPart entryPart = new StringPart("entry", entry.toString());
  entryPart.setContentType("application/atom+xml");

  FilePart filePart = new FilePart("file", new File(resource.getFile()));           

  RequestEntity request = new MultipartRequestEntity(new Part[] { entryPart, filePart}, this.client.getHttpClientParams());
  ClientResponse response = client.post(this.url + this.activityId, request, options);

IBM Connections , API.