Download Document from alfresco using opencmis
Question
I want to download document from alfresco using path but i am getting content length null and image can be downloaded in browser but nothing is displaying. Can anybody point out what i am doing wrong.
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.DataInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.util.HashMap;
import java.util.Map;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.chemistry.opencmis.client.api.CmisObject;
import org.apache.chemistry.opencmis.client.api.Document;
import org.apache.chemistry.opencmis.client.api.Folder;
import org.apache.chemistry.opencmis.client.api.Session;
import org.apache.chemistry.opencmis.client.api.SessionFactory;
import org.apache.chemistry.opencmis.client.runtime.SessionFactoryImpl;
import org.apache.chemistry.opencmis.commons.PropertyIds;
import org.apache.chemistry.opencmis.commons.SessionParameter;
import org.apache.chemistry.opencmis.commons.data.ContentStream;
import org.apache.chemistry.opencmis.commons.enums.BindingType;
public class TestServlet extends HttpServlet {
private static final String ALFRSCO_ATOMPUB_URL = "http://localhost:8484/alfresco/cmisatom";
private static final String REPOSITORY_ID = "cf9aacff-a023-477f-a7e1-a8a901cf0b27";
/**
* Processes requests for both HTTP <code>GET</code> and <code>POST</code>
* methods.
*
* @param request servlet request
* @param response servlet response
* @throws ServletException if a servlet-specific error occurs
* @throws IOException if an I/O error occurs
*/
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset=UTF-8");
try (PrintWriter out = response.getWriter()) {
/* TODO output your page here. You may use following sample code. */
out.println("<!DOCTYPE html>");
out.println("<html>");
out.println("<head>");
out.println("<title>Servlet TestServlet</title>");
out.println("</head>");
out.println("<body>");
out.println("<h1>Servlet TestServlet at " + request.getContextPath() + "</h1>");
out.println("</body>");
out.println("</html>");
Map<String, String> parameter = new HashMap<String, String>();
// Set the user credentials
parameter.put(SessionParameter.USER, "admin");
parameter.put(SessionParameter.PASSWORD, "admin");
// Specify the connection settings
parameter.put(SessionParameter.ATOMPUB_URL, ALFRSCO_ATOMPUB_URL);
parameter.put(SessionParameter.BINDING_TYPE, BindingType.ATOMPUB.value());
//Add repository Id
parameter.put(SessionParameter.REPOSITORY_ID, REPOSITORY_ID);
// Create a session
SessionFactory factory = SessionFactoryImpl.newInstance();
Session session = factory.getRepositories(parameter).get(0).createSession();
System.out.println("Connected to repository:" + session.getRepositoryInfo().getName());
Folder root = session.getRootFolder();
System.out.println("Repository Name: "+root.getName()+"id: "+session.getRepositoryInfo().getId());
// (minimal set: name and object type id)
String path1 = "/Hello/img.jpg";
Document doc = (Document) session.getObjectByPath(path1);
System.out.println(doc.getId()+" docname: "+doc.getName());// docId=workspace://SpacesStore/669bd07f-7a3d-471c-b6f3-bff6764f827e
// String fullPath= "/Hello" + "/imgss.png";
Document doc1 = (Document)session.getObject(doc.getId());
// CmisObject obj=doc1;
Document newDocument = (Document) session.getObjectByPath(path1);
System.out.println(newDocument.getId());
//File file = new File(home+"/Downloads/" + fileName + ".txt");
response.setContentType("application/force-download");
//response.setContentLength(-1);
response.setContentType("application/octet-stream");
response.setHeader("Content-Transfer-Encoding", "binary");
response.setHeader("Content-Disposition","attachment; filename=img.jpg");//fileName);
try {
ContentStream cs = doc1.getContentStream(null);
System.out.println("buffered content: "+cs);
BufferedInputStream in =new BufferedInputStream(cs.getStream());
// FileOutputStream fos = new FileOutputStream(home);
// OutputStream bufferedOutputStream = new BufferedOutputStream(fos);
System.out.println("buffered outputstream: "+in);
DataInputStream din = new DataInputStream(in);
while(din.available() > 0){
out.print(din.readLine());
out.print("\n");
}
din.close();
in.close();
}
catch (IOException e)
{
throw new RuntimeException(e.getLocalizedMessage());
}
}
}
}
OUTPUT which i got in console:
Connected to repository:Main Repository
Repository Name: Company Homeid: 4cdc8cd1-ddf1-4e30-95f8-4a2219073580
workspace://SpacesStore/2284cd59-8480-40fa-baed-05d54ddfc561;1.0 docname: imgss.png
workspace://SpacesStore/2284cd59-8480-40fa-baed-05d54ddfc561;1.0
buffered content: ContentStream [filename=imgss.png, length=null, MIME type=image/png, has stream=true][extensions=null]
buffered outputstream: java.io.BufferedInputStream@173b5e2
Image in alfresco :
Image i have downloaded is :
1 answers
solution1
1 ACCPTED 2017-01-02 07:38:39
In alfresco you can download a document using to ways
In my solution you will use
serverUrl : "http://127.0.0.1:8080/alfresco/api/-default-/public/cmis/versions/1.0/atom";
username : admin
password : admin
First way : using the document Id
The ID of a document is the the ID that Alfresco fixed for this document when we upload it in Alfresco
public static void downloadDocumentByID(String serverUrl, String username, String password ,String documentID,String fileName,String destinationFolder){
String fullPath= destinationFolder + fileName;
Document newDocument = (Document) getSession(serverUrl, username, password).getObject(documentID);
System.out.println(newDocument.getId());
try {
ContentStream cs = newDocument.getContentStream(null);
BufferedInputStream in =new BufferedInputStream(cs.getStream());
FileOutputStream fos = new FileOutputStream(fullPath);
OutputStream bufferedOutputStream = new BufferedOutputStream(fos);
byte[] buf = new byte[1024];
int n=0;
while ((n=in.read(buf))>0)
{
bufferedOutputStream.write(buf,0,n);
}
bufferedOutputStream.close();
fos.close();
in.close();
}
catch (IOException e)
{
throw new RuntimeException(e.getLocalizedMessage());
}
}
Second way : using the document Path
In this solution you have to get the Path of the Document, sometimes it's hard to get it, this is way i always work with the first
public static void downloadDocumentByPath(String serverUrl, String username, String password ,String path,String destinationFolder){
String fileExtention = path.substring(path.lastIndexOf(".")+1,path.length());
String folderPath=path.substring(0,path.lastIndexOf("/"));
String fileName=path.substring(path.lastIndexOf("/")+1,path.length());
Folder parentFolder = getFolderByPath(serverUrl, username, password,folderPath);
Document newDocument = getChild(serverUrl, username, password , parentFolder ,fileName);
String fullPath = destinationFolder+fileName;
try {
ContentStream cs = newDocument.getContentStream(null);
BufferedInputStream in =new BufferedInputStream(cs.getStream());
FileOutputStream fos = new FileOutputStream(destinationFolder);
System.out.println("****-**"+destinationFolder+":::");
OutputStream bufferedOutputStream = new BufferedOutputStream(fos);
byte[] buf = new byte[1024];
int n=0;
while ((n=in.read(buf))>0)
{
bufferedOutputStream.write(buf,0,n);
}
bufferedOutputStream.close();
fos.close();
in.close();
}
catch (IOException e)
{
throw new RuntimeException(e.getLocalizedMessage());
}
}
You can Read more here Download user selected file/upload a file to a user selected directory both with primefaces
In addition you can work with contentStram it will look like this
public InputStream downloadDocument(String serverURL, String nomUtilisateur, String passwordUtilisateur, String path, String nomFile) {
Document newDocument = (Document) getSession(serverURL, nomUtilisateur, passwordUtilisateur).getObject(path);
ContentStream cs = newDocument.getContentStream(null);
return cs.getStream();
}
and simply call this method
public void downloaddoc(Document doc) throws FileNotFoundException, TransformerConfigurationException, TransformerException {
InputStream input = downloaddoc(serverUrl, username, password, doc.getPath(), doc.getNameFile);
ExternalContext externalContext = FacesContext.getCurrentInstance().getExternalContext();
setDownload(new DefaultStreamedContent(input, externalContext.getMimeType(doc.getNomRepertoire()), doc.getNomRepertoire()));
}
Hope that helped you.
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.
Related Question
Change the version manually of a Document in Alfresco using OpenCmis
Retrieving a Document from a QueryResult with OpenCMIS
alfresco folder tree opencmis
Error while connecting to Alfresco repository using opencmis and SSO
Alfresco openCMIS connect to home folder
Setting/Updating multiple document properties in SharePoint 2010 using OpenCMIS
How can I download a file from Alfresco Server using java?
create User in alfresco by OpenCMIS or java API
Update alfresco content type through chemistry OpenCMIS
What is the ideal session timeout for chemistry opencmis session for Alfresco?
Related Tags