Error in accessing file from Knowledge Base while creating plugin

Question

Hi All, 
 I am trying to access the existing file from KDB using method cs.download(documentId, ContentConstants.VERSION_CURRENT, Boolean.valueOf(false)), 
 I'm facing a error : 
 ERROR com.appiancorp.connectedsystems.http.execution.AppianHttpRequestExecutor - ConnectorRuntimeException [title=The requested URL cannot be found, The external system did not find the requested URL or is refusing to allow access] 
 Can some one help me on this. 
 Thanks

Raghuvaran Nagarajan · Accepted Answer

Ok, Please share me those details. And in addition I have shared a sample code for an alternative API which I have always used. 
 
 Are you trying to access a document from Appian's internal content manager to read/write and manipulate the content/data?
 
 Note: The documents inside Appian will be directly stored into the file system of the application server not in the KDB. Only the reference/analytic data and other metadata will be stored in Appian's content KDB

Do you always access a Appian file or do you sometimes access Appian document folders direcly? I mean pass folderId instead of document Id to your smartservice 
 
 If you just want read/write a appian document, you can do it through this java api. I have used this api in all the smartservices which involves file manipulation, And it works fine 
 Long documentId = 123L; /* Input document ID */
String filePath = cs.getInternalFilename(_cs.getVersion(documentId,ContentConstants.VERSION_CURRENT)); /* you will get something like, C:\appian\_admin\accdocs1\1\10000001.pdf */
File jAppianFile = new File(filePath);
 
 Thanks, 
 Raghu

Raghuvaran Nagarajan · Answer

The user's privilege with which the ContentService (cs) was initiated may not be sufficient to download the specific file. 
 
 Check if the user has the required security permissions to access the file. 
 Try running the smartservice in the context of a process designer / system admin who has elevated access. 
 
 Thanks, 
 Raghu

Raghuvaran Nagarajan · Answer

** UPDATED THE EMBEDDED CODE IN PREVIOUS REPLY ** 
 
 You may not need cs.download() for your requirement, you can directly use cs.getInternalFileName(), refer the updated code in my previous reply. 
 Since you are writing INFO level logs, Check if you have enabled INFO level logs for your class in the Appian's log4j properties. This might be the reason why you dint see any log entries in the application server logs. Either,
 
 Temporarily change all logs to ERROR level like LOG.error("TEST LOG"); which we can change to appropriate levels once development and debugging is done --OR-- 
 Enable INFO level logs in log4j.properties

Thanks, 
 Raghu