FASTDFS configuration, deployment, and API usage interpretation (3) client-side code for uploading files in a streaming manner

The APIs that are called are:

String[] Upload_file (

String group_name,//group name, not specified, can be set to NULL

Long file_size,//file size, must be developed

Uploadcallback callback,//Callback

String File_ext_name,

Namevaluepair[] Meta_list

)

1     /** 2 * Upload File to DFS, directly transferring Java.io.InputStream to Java.io.OutStream3 * @author poechant4 * @email [email protected]5 * @param filebuff, file to be uploaded.6 * @param uploadfilename, the name of the file.7 * @param filelength, the length of the file.8 * @return The file ID in DFS.9 * @throws IOExceptionTen      */   One      PublicString[] Uploadfilebystream (InputStream instream, String uploadfilename,Longfilelength) throws IOException { A            -String[] results =NULL;  -String Fileextname ="";  the         if(Uploadfilename.contains (".")) {   -Fileextname = uploadfilename.substring (Uploadfilename.lastindexof (".") +1);  -}Else {   -Logger.warn ("Fail to upload file, because the format of filename is illegal.");  +             returnresults;  -         }   +            ATrackerclient Tracker =Newtrackerclient ();  atTrackerserver Trackerserver =tracker.getconnection ();  -Storageserver Storageserver =NULL;  -StorageClient1 client =NewStorageClient1 (Trackerserver, storageserver);  -               -namevaluepair[] Metalist =Newnamevaluepair[3];  -metalist[0] =NewNamevaluepair ("FileName", Uploadfilename);  inmetalist[1] =NewNamevaluepair ("Fileextname", Fileextname);  -metalist[2] =NewNamevaluepair ("Filelength", String.valueof (filelength));  to               +            Try {   -             //Results[0]: GroupName, results[1]: Remotefilename.  theResults = Client.upload_file (NULL, Filelength,NewUploadfilesender (instream), Fileextname, Metalist);  *}Catch(Exception e) { $Logger.warn ("Upload file \ ""+ Uploadfilename +"\ "Fails"); Panax Notoginseng         }   -               the Trackerserver.close ();  +            A         returnresults;  the}

The Uploadfilesender is a class that implements the Uploadcallback interface:

1     Private Static classUploadfilesender implements Uploadcallback {2           3         PrivateInputStream instream; 4           5          PublicUploadfilesender (InputStream instream) {6              This. instream =instream; 7         }  8           9          Public intSend (OutputStream out) throws IOException {Ten             intreadbytes;  One              while((Readbytes = Instream.read ()) >0) {   A                  out. Write (readbytes);  -             }   -             return 0;  the         }   -}

FASTDFS configuration, deployment, and API usage interpretation (3) client code for uploading files in a stream (go)