/**
* @param fileName ev3 full filename
* @param timeout timeout in msec
* @param part strongly recommended set about 1000 bytes
* @return byte[] byte of file
* @throws IOException
*/
public byte[] getFile(String fileName, int timeout, int part) throws IOException {
SystemFormatter sf =
new SystemFormatter(SystemCommand.Command.BEGIN_GETFILE, SystemCommand.REPLY);
short chunk = 1000; // SystemCommand.MAX_FILE_CHUNK
if (part > 0 && part <= SystemCommand.MAX_FILE_CHUNK) {
chunk = (short) part;
}
sf.addSize(chunk);
sf.addString(fileName);
byte[] bytecode = sf.toByteArray();
connector.write(bytecode, timeout);
bytecode = connector.read(0, 0);
if (bytecode[6] != SystemCommand.SUCCESS && bytecode[6] != SystemCommand.END_OF_FILE) {
throw new IOException("Could not begin upload file: " + bytecode[6]);
}
int totalSize =
((bytecode[10] & 0xFF) << 24)
+ ((bytecode[9] & 0xFF) << 16)
+ ((bytecode[8] & 0xFF) << 8)
+ (bytecode[7] & 0xFF);
byte handler = bytecode[11];
byte[] bfile = new byte[totalSize];
int sizeRead = bytecode.length - 12;
chunk = (short) sizeRead;
System.arraycopy(bytecode, 12, bfile, 0, sizeRead);
while (sizeRead < totalSize) {
sf = new SystemFormatter(SystemCommand.Command.CONTINUE_GETFILE, SystemCommand.REPLY);
sf.addByteCode(handler);
int newRead = Math.min(chunk, totalSize - sizeRead);
sf.addSize(newRead);
bytecode = sf.toByteArray();
connector.write(bytecode, timeout);
bytecode = connector.read(0, 0);
if (bytecode[6] != SystemCommand.SUCCESS && bytecode[6] != SystemCommand.END_OF_FILE) {
throw new IOException("Error CONTINUE_UPLOAD: " + bytecode[6]);
}
handler = bytecode[11];
newRead = bytecode.length - 12;
System.arraycopy(bytecode, 12, bfile, sizeRead, newRead);
sizeRead += newRead;
}
return bfile;
}
/**
* @param path
* @param timeout
* @return The new line delimited list is formatted as:
* <p>If it is a file: 32 chars (hex) of MD5SUM + space + 8 chars (hex) of filesize + space +
* filename + new line
* <p>If it is a folder: foldername + / + new line
* @throws IOException
*/
public String readFolder(String path, int timeout) throws IOException {
SystemFormatter sf = new SystemFormatter(SystemCommand.Command.LIST_FILES, SystemCommand.REPLY);
short chunk = 100;
sf.addSize(chunk);
sf.addString(path);
byte[] data = sf.toByteArray();
connector.write(data, timeout);
data = connector.read(0, 0);
if (data[6] != SystemCommand.SUCCESS && data[6] != SystemCommand.END_OF_FILE) {
throw new IOException("Could not begin fileList read: " + data[6]);
}
int totalSize =
((data[10] & 0xFF) << 24)
+ ((data[9] & 0xFF) << 16)
+ ((data[8] & 0xFF) << 8)
+ (data[7] & 0xFF);
byte handler = data[11];
byte[] bstring = new byte[totalSize];
int sizeRead = Math.min(chunk, totalSize);
System.arraycopy(data, 12, bstring, 0, sizeRead);
while (sizeRead < totalSize) {
sf = new SystemFormatter(SystemCommand.Command.CONTINUE_LIST_FILES, SystemCommand.REPLY);
sf.addByteCode(handler);
int newRead = Math.min(chunk, totalSize - sizeRead);
sf.addSize(newRead);
data = sf.toByteArray();
connector.write(data, timeout);
data = connector.read(0, 0);
if (data[6] != SystemCommand.SUCCESS && data[6] != SystemCommand.END_OF_FILE) {
throw new IOException("Error reading fileList: " + data[6]);
}
handler = data[7];
System.arraycopy(data, 8, bstring, sizeRead, newRead);
sizeRead += newRead;
}
String str = new String(bstring, "UTF-8");
return str;
}
/**
* See lego ev3 firmware developer kit, Folder structure within firmware, page 102;
*
* <p>See lego ev3 communication developer kit, Downloading data to the EV3 programmable brick,
* page 7;
*
* @param data byte[] body of local file
* @param outputFileName brick full filename e.g. "../prjs/SD_Card/test/1.jpg"
* @param timeout between each iteration of transmission, msec
* @param part portion of bytes in each iteration of transmission. default 10000, must be between
* 1 and SystemCommand.MAX_FILE_CHUNK
* @param sh sh is handler which counts progress in transmission, may be null
* @throws IOException
*/
public void sendFile(byte[] data, String outputFileName, int timeout, int part, ProcessHandler sh)
throws IOException {
int fileSize = data.length;
if (sh != null) {
sh.setTotal(fileSize);
}
int chunk = 10000; // SystemCommand.MAX_FILE_CHUNK
if (part > 0 && part <= SystemCommand.MAX_FILE_CHUNK) {
chunk = part;
}
SystemFormatter sf =
new SystemFormatter(SystemCommand.Command.BEGIN_DOWNLOAD, SystemCommand.REPLY);
sf.addSize(fileSize);
sf.addString(outputFileName);
byte[] bytecode = sf.toByteArray();
connector.write(bytecode, timeout);
bytecode = connector.read(0, 0);
if (bytecode[6] != SystemCommand.SUCCESS) {
throw new IOException("Could not begin file save: " + bytecode[6]);
}
byte handler = bytecode[7];
int sizeSent = 0;
while (sizeSent < data.length) {
sf = new SystemFormatter(SystemCommand.Command.CONTINUE_DOWNLOAD, SystemCommand.REPLY);
sf.addByteCode(handler);
int sizeToSend = Math.min(chunk, data.length - sizeSent);
sf.addBytes(data, sizeSent, sizeToSend);
bytecode = sf.toByteArray();
connector.write(bytecode, timeout);
bytecode = connector.read(0, 0);
handler = bytecode[7];
sizeSent += sizeToSend;
if (sh != null) {
sh.setCurrent(sizeSent);
}
if (bytecode[6] != SystemCommand.SUCCESS && bytecode[6] != SystemCommand.END_OF_FILE) {
throw new IOException("Error saving file: " + bytecode[6]);
}
}
}