Blob downloading problem with java automation client
I am trying to download all the files (txt, html, pdf, doc, xls, …) from nuxeo. To achieve this, I have found “Java automation client”. (Hope I have made a good choice?)
My starting point is the example from the java automation client documentation: http://doc.nuxeo.com/display/public/NXDOC/Java+Automation+Client
1) Getting all the docs:
Documents docs = (Documents) session.newRequest("Document.Query").set(
"query", "SELECT * FROM Document WHERE ecm:primaryType=\'File\' " +
"OR ecm:primaryType=\'Note\'").execute();
2) With an iteration, get every “doc” from “docs” and get its blob:
Iterator<Document> it = docs.iterator();
while (it.hasNext()){
Document doc = (Document)it.next();
String path = doc.getPath();
path = URLEncoder.encode(path, "UTF-8");
Blob blob = (FileBlob) session.getFile(path);
try{
InputStream is = blob.getStream();
// do something with "is"
}catch(Exception e){
e.printStackTrace();
}
}
But every time, I get the exception:
Exception in thread "main" java.lang.RuntimeException: Cannot execute {Authorization=Basic QWRtaW5pc3RyYXRvcjpBZG1pbmlzdHJhdG9y}
at org.nuxeo.ecm.automation.client.jaxrs.impl.HttpConnector.execute(HttpConnector.java:122)
at org.nuxeo.ecm.automation.client.jaxrs.spi.ConnectorHandler.execute(ConnectorHandler.java:30)
at org.nuxeo.ecm.automation.client.jaxrs.spi.DefaultSession.getFile(DefaultSession.java:127)
at Extract.main(Extract.java:79)
Caused by: java.lang.NullPointerException
at org.nuxeo.ecm.automation.client.RemoteException.extractInfo(RemoteException.java:61)
at org.nuxeo.ecm.automation.client.RemoteException.<init>(RemoteException.java:38)
at org.nuxeo.ecm.automation.client.jaxrs.impl.HttpConnector.execute(HttpConnector.java:145)
at org.nuxeo.ecm.automation.client.jaxrs.impl.HttpConnector.execute(HttpConnector.java:118)
... 3 more
I have spent already 2 days on this, and I am making little progress. Please help!!! thanks in advance!!!
Hi,
There are ways to download blobs with Nuxeo automation client:
// Retrieve document note with full schemas - or using Query operation with doc listing
note = (Document) session.newRequest(DocumentService.FetchDocument).setHeader(
Constants.HEADER_NX_SCHEMAS, "*").set("value",
"/path/path").execute();
PropertyList list = note.getProperties().getList("files:files");
PropertyMap map = list.getMap(0).getMap("file");
assertEquals(filename1, map.getString("name"));
assertEquals("text/xml", map.getString("mime-type"));
// get the data URL
String path = map.getString("data");
blob = (FileBlob) session.getFile(path);
// the same for the second file
map = list.getMap(1).getMap("file");
assertEquals(filename2, map.getString("name"));
assertEquals("text/xml", map.getString("mime-type"));
// get the data URL
path = map.getString("data");
blob = (FileBlob) session.getFile(path);
You can have several informations on download blobs url pattern here: http://doc.nuxeo.com/display/NXDOC/Downloading+Files
Another way is to use “Blob.Get”, “Blob.GetList”, “Blob.GetAll” operations. Here an example:
// now test the GetDocumentBlobs operation on the note document
blobs = (Blobs) session.newRequest(GetDocumentBlobs.ID).setInput(note).set(
"xpath", "files:files").execute();
We're going to improve the way we can download blobs in general.
Thanks for your feedback.
 |
Vladimir Pasquier
Member (3.2K) 2 4 4 |
10/28/2013 ( History) |
There were another example in java remote automation page, which uploads a file "/myfile" to the root directory and download it after. Strangely, this example worked fine, which means "PropertyMap" was not a null value.
I got a file in nuxeo like this: "/Text Document/workspaces/myworkspace/PourIvan.txt", which I had uploaded using nuxeo interface. I replaced "/myfile" with the path of this file, and still the "PropertyMap" was a null value…
So Those experiments led me to followoing questions:
1) Is my query is valid to get the files and their "PropertyMap"?
"SELECT * FROM Document WHERE ecm:primaryType=\'File\' " +
"OR ecm:primaryType=\'Note\'"
2) If we upload a file using nuxeo interface, will it have a "PropertyMap"?
3) I replaced the "/myfile" in the example with "/Text Document/workspaces/myworkspace/myfile", and it gave me an error which says "failed Blob.Attach action"… So is it possible to attach a file to other directories other than root using the same code in the example?
4) I printed the "/myfile" path in the example, and it gave me something like this: files/a8b3556c-2b99-47c3-876d-2e0b9720276d?path=%2Fcontent it seems like "files" + id + ??? … So, how can we construct a file path if we have the file id?
I am restraining myself to those four questions. :) thanks in advance !!!
