static void get(String srcFileOnAqua, String destFileOnLocal)
{
// step 1. instantiate a client to connect to Aqua
String rootURL = "http://*****:*****@172.16.20.131:8080/aqua/rest/cdmi";
String homeContainer = "/hongquan/test999";
String jsonProps = "";
AquaClientRef client = new AquaClientRef(rootURL, homeContainer, jsonProps);
try
{
// step 2. open the output file on local disk to save
FileStream fcOut = null;
Console.WriteLine("opening external output file: " + destFileOnLocal);
fcOut = new FileStream(destFileOnLocal, FileMode.Create);
// step 3. allocate a Byte array dataBuf. be aware this buffer must be allocated via direct mode
int buffSize = 100 * 1024;
byte[] dataBuf = new byte[buffSize];
// step 4. copy the data buffer by buffer and save to the local file
int len = 0;
int offset = 0;
// the output string parameters from API nonCdmi_ReadDataObject()
StringBuilder location = new StringBuilder();
StringBuilder contentType = new StringBuilder();
// the loop
do
{
// step 4.1 clean up the data left in the dataBuf
Array.Clear(dataBuf, 0, dataBuf.Length);
// step 4.2 initialize the output nread with the capacity of dataBuf
len = dataBuf.Length;
LongVariable nread = new LongVariable(0);
// step 4.3 invokes nonCdmi_ReadDataObject() to read data range [offset, offset+dataBuf.capacity()] into dataBuf
int ret = client.nonCdmi_ReadDataObject(srcFileOnAqua, contentType,
location, offset, nread, dataBuf, len, false);
Console.WriteLine("read aqua contenttype=" + contentType + " location=" + location);
// step 4.4 check the return code
if (ret >= 200 && ret < 300)
{
len = (int)nread.get();
}
else
{
len = 0;
}
Console.WriteLine("read aqua ret=" + ret + " len=" + len);
// step 4.5 quit the loop if error occurs or reached the EOF
if (len <= 0)
{
break;
}
// step 4.6 write the received dataBuf into the local file
Console.WriteLine("copying " + offset + "+" + len);
fcOut.Write(dataBuf, 0, len);
//setp4.7 file eof
// if(len < dataBuf.Length)
// break;
// step 4.7 step the offset for next round
offset += len;
} while (len > 0);
// step 5. finish getting, close the local file
Console.WriteLine("file copied, size=" + offset);
fcOut.Close();
}
catch (FileNotFoundException ex)
{
Console.WriteLine(ex.Message + " in the specified directory.");
}
catch (IOException e)
{
Console.WriteLine(e.Message);
}
}
static void copy(String srcFile, String destFile)
{
bool bFromAqua = (0 == srcFile.IndexOf("FUSE:"));
bool bToAqua = (0 == destFile.IndexOf("FUSE:"));
String rootURL = "http://*****:*****@172.16.20.131:8080/aqua/rest/cdmi";
String homeContainer = "/default/npvr";
String jsonProps = "";
AquaClientRef client = new AquaClientRef(rootURL, homeContainer, jsonProps);
try
{
FileStream fcIn = null, fcOut = null;
if (!bFromAqua)
{
Console.WriteLine("opening external input file: " + srcFile);
fcIn = new FileStream(srcFile, FileMode.Open);
}
else
{
srcFile = srcFile.Substring(5); // cut off the leading "FUSE:"
}
if (!bToAqua)
{
Console.WriteLine("opening external output file: " + destFile);
fcOut = new FileStream(srcFile, FileMode.Create);
}
else
{
destFile = destFile.Substring(5); // cut off the leading "FUSE:"
}
int buffSize = 100 * 1024;
byte[] dataBuf = new byte[buffSize];
int len = 0;
int offset = 0;
StringBuilder location = new StringBuilder();
StringBuilder contentType = new StringBuilder();
do
{
Array.Clear(dataBuf, 0, dataBuf.Length);
if (bFromAqua)
{
len = dataBuf.Length;
LongVariable nread = new LongVariable(0);
int ret = client.nonCdmi_ReadDataObject(srcFile, contentType,
location, offset, nread, dataBuf, len, false);
if (ret >= 200 && ret < 300)
{
len = (int)nread.get();
}
Console.WriteLine("read aqua ret=" + ret + " len=" + len);
}
else
{
// len = fis.read(dataBuf);
len = fcIn.Read(dataBuf, 0, buffSize);
}
if (len <= 0)
{
break;
}
Console.WriteLine("copying " + offset + "+" + len);
if (bToAqua)
{
int ret = client.nonCdmi_UpdateDataObject(destFile,
location, "", offset, -1, dataBuf, len, true, false);
if (ret < 200 || ret >= 300)
{
break;
}
}
else
{
// fos.write(dataBuf, 0, len);
fcOut.Write(dataBuf, 0, len);
}
offset += len;
} while (len > 0);
Console.WriteLine("file copied, size=" + offset);
if (!bFromAqua)
{
// fis.close();
fcIn.Close();
}
if (!bToAqua)
{
// fos.close();
fcOut.Close();
}
else
{
client.flushDataObject(destFile);
}
}
catch (FileNotFoundException ex)
{
Console.WriteLine(ex.Message + " in the specified directory.");
}
catch (IOException e)
{
Console.WriteLine(e.Message);
}
}