private InputStream fetchInputStreamJCraft()

in transport/scp-transport/src/main/java/org/apache/airavata/mft/transport/scp/SCPIncomingConnector.java [79:133]

40 lines of code
9 McCabe index (conditional complexity)


    private InputStream fetchInputStreamJCraft(String resourcePath) throws Exception{
        String command = "scp -f " + resourcePath;
        channel = session.openChannel("exec");
        ((ChannelExec) channel).setCommand(command);

        // get I/O streams for remote scp
        out = channel.getOutputStream();
        in = channel.getInputStream();

        channel.connect();

        // send '\0'
        buf[0] = 0;
        out.write(buf, 0, 1);
        out.flush();

        while (true) {
            int c = checkAck(in);
            if (c != 'C' && c != 'c' ) {
                break;
            }

            // read '0644 '
            in.read(buf, 0, 5);

            long filesize = 0L;
            while (true) {
                if (in.read(buf, 0, 1) < 0) {
                    // error
                    break;
                }
                if (buf[0] == ' ') break;
                filesize = filesize * 10L + (long) (buf[0] - '0');
            }

            String file = null;
            for (int i = 0; ; i++) {
                in.read(buf, i, 1);
                if (buf[i] == (byte) 0x0a) {
                    file = new String(buf, 0, i);
                    break;
                }
            }

            logger.info("file-size=" + filesize + ", file=" + file);
            // send '\0'
            buf[0] = 0;
            out.write(buf, 0, 1);
            out.flush();

            // read a content of lfile
            return new LimitInputStream(in, filesize);
        }
        return null;
    }