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From: Geoffroy EMPAIN <empaingeo@hotmail.com>
To: "user@commons.apache.org" <user@commons.apache.org>
Subject: FTPClient, resume an interrupted upload?
Date: Sun, 5 May 2013 07:47:17 +0000
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Hello everyone=2C

I'm currently working on an App that uploads large PDFs to a server. The ap=
p works fine=2C but everytime=2C since the PDFs are so large (25MB)=2C the =
upload takes a while=2C and usually after let's say 30 or 40 minutes=2C I g=
et a "socketException : broken pipe". I believe that this is due to a timeo=
ut or disconnect from the server (the server cuts the connection I guess)=
=2C so I moved the upload routine in a loop that has a try / catch. When an=
 exception is thrown=2C I try to reconnect. It works fine. The upload start=
s where it stopped and completes.

Problem? Well=2C since the upload is "broken" in two parts (or more if any =
other connection loss occurs)=2C the file uploaded is broken too! I mean th=
at's definatley normal and I unerstand why that happens=2C but what I'd lik=
e to know is how you can keep the upload on "hold" while trying to reconnec=
t. I just want to be able to do a complete upload even if there are reconne=
ctions. I want my PDF to uploaded completely. Here is the code I have :

// In
inputStream =3D new FileInputStream(localFile)=3B=20

// For upload loop
byte[] bytesIn =3D new byte[4096]=3B
int read =3D 0=3B

// Loop until job is not completed (will try to reconnect if any exception =
is thrown)
boolean completed =3D false=3B
while (!completed){
    try{

        // Out
        OutputStream outputStream =3D ftpClient.storeFileStream(remoteFile)=
=3B

        // Transfer                   =20
        while ((read =3D inputStream.read(bytesIn)) !=3D -1) {
            outputStream.write(bytesIn=2C 0=2C read)=3B
            transfered +=3D read=3B
        }

        // Closing streams
        inputStream.close()=3B
        outputStream.close()=3B

        // Final information
        completed =3D ftpClient.completePendingCommand()=3B
        if (completed) System.out.println("Done")=3B
        else System.out.println("Failure.")=3B
        completed =3D true=3B

    } // end try=20
    catch (Exception e) {

        // Telling the user
        System.out.println("Trying to reconnect...")=3B
        Thread.sleep(1000)=3B

        // Try to reconnect
        ftpClient.connect(server=2C port)=3B
        success =3D ftpClient.login(user=2C pass)=3B
        if (success) {
            System.out.println("Connection : OK")=3B
            Thread.sleep(1000)=3B
        } else {
            System.out.println("Failed to connect")=3B
        }

        // Set passive mode and file type to binary
        ftpClient.enterLocalPassiveMode()=3B
        ftpClient.setFileType(FTPClient.BINARY_FILE_TYPE)=3B

    } // end catch
} // end loop

Any help will be greatly apreciated! Thanks to the community!

Best regards=3B

Geoffrey
 		 	   		  =

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