/// <summary>
/// Select the mode for this session, batch or interactive,
/// based on the arguments. Don't be weirded out by this
/// function calling TWAIN Local On Sane and then that function using
/// Sword. This is a static function, it's just a convenience
/// to use the Sword object to hold it, it could go anywhere
/// and later on probably will (like as a function inside of
/// the Program module).
/// </summary>
/// <returns>true for batch mode, false for interactive mode</returns>
public static bool SelectMode()
{
int iPid = 0;
string szIpc = null;
string szTaskFile = "";
string szWriteFolder;
bool blTestTwainLocalOnSane = false;
// Sleep so we can attach and debug stuff...
int iDelay = (int)Config.Get("delayTwainDirectOnSane", 0);
if (iDelay > 0)
{
Thread.Sleep(iDelay);
}
// Check the arguments...
szWriteFolder = Config.Get("writeFolder", null);
szTaskFile = Config.Get("task", null);
blTestTwainLocalOnSane = (Config.Get("testtwainlocalonsane", null) != null);
szIpc = Config.Get("ipc", null);
iPid = int.Parse(Config.Get("parentpid", "0"));
// Handle the SANE list...
string szSaneList = Config.Get("sanelist", null);
if (szSaneList != null)
{
if (szSaneList == "")
{
szSaneList = Path.Combine(Config.Get("writeFolder", ""), "sanelist.txt");
}
System.IO.File.WriteAllText(szSaneList, Sword.SaneListDrivers());
return(true);
}
// Test TWAIN Local on SANE...
if (blTestTwainLocalOnSane)
{
TestTwainLocalOnSane testtwainlocalonsane;
// List the scanners...
Sword.SaneListDrivers();
// Create our object...
testtwainlocalonsane = new TestTwainLocalOnSane(Config.Get("scanner", null), szWriteFolder, iPid, szTaskFile, szIpc);
// Do the test...
testtwainlocalonsane.Test();
// All done...
return(true);
}
// Run in IPC mode. The caller has set up a 'pipe' for us, so we'll use
// that to send commands back and forth...
if (szIpc != null)
{
TwainLocalOnSane twainlocalonsane;
// Create our object...
twainlocalonsane = new TwainLocalOnSane(szWriteFolder, szIpc, iPid);
// Run our object...
twainlocalonsane.Run();
// All done...
return(true);
}
// If we have a file, then take the shortcut, this is the path to use
// when running under another program, like an HTTP service.
if (File.Exists(szTaskFile))
{
bool blSetAppCapabilities = false;
string szScanImageArguments = "";
Sword sword;
SwordTask swordtask;
// Init stuff...
swordtask = new SwordTask();
// Create our object...
sword = new Sword();
// Run our task...
sword.BatchMode(Config.Get("scanner", null), szTaskFile, false, ref swordtask, ref blSetAppCapabilities, out szScanImageArguments);
// All done...
return(true);
}
// Otherwise let the user interact with us...
TwainDirectSupport.Log.Info("Interactive mode...");
return(false);
}
/// <summary>
/// Test our ability to run the TWAIN driver using the TWAIN Direct Client-Scanner API
/// as the controlling API. This is easier to debug than running stuff
/// across more than one process with the cloud involved...
/// </summary>
/// <returns></returns>
public bool Test()
{
int ii;
int[] aiImageBlockNum;
long lResponseCharacterOffset;
bool blSts;
bool blEndOfJob;
string szJson;
Thread thread;
Ipc ipc;
JsonLookup jsonlookup;
// Create our objects...
m_twainlocalonsane = new TwainLocalOnSane(m_szWriteFolder, m_szIpc, Process.GetCurrentProcess().Id);
jsonlookup = new JsonLookup();
ipc = new Ipc(m_szIpc, true);
// Run in a thread...
thread = new Thread(RunTest);
thread.Start();
// Wait for a connection...
ipc.Accept();
// Create Session...
#region Create Session...
// Open the scanner...
blSts = ipc.Write
(
"{" +
"\"method\":\"createSession\"," +
"\"scanner\":\"" + m_szScanner + "\"" +
"}"
);
if (!blSts)
{
TwainDirectSupport.Log.Error("Lost our process...");
goto ABORT;
}
// Get the result...
szJson = ipc.Read();
// Analyze the result...
try
{
jsonlookup.Load(szJson, out lResponseCharacterOffset);
if (jsonlookup.Get("status") != "success")
{
TwainDirectSupport.Log.Error("createSession failed: " + jsonlookup.Get("status"));
return(false);
}
}
catch
{
TwainDirectSupport.Log.Error("createSession failed: JSON error");
return(false);
}
#endregion
// Set TWAIN Direct Options...
#region Set TWAIN Direct Options...
string szTwainDirectOptions = File.ReadAllText(m_szTask);
blSts = ipc.Write
(
"{" +
"\"method\":\"setTwainDirectOptions\"," +
"\"task\":" + szTwainDirectOptions +
"}"
);
if (!blSts)
{
TwainDirectSupport.Log.Error("Lost our process...");
goto ABORT;
}
// Get the result...
szJson = ipc.Read();
if (szJson == null)
{
TwainDirectSupport.Log.Error("Lost our process...");
goto ABORT;
}
#endregion
// Start Capturing...
#region Start Capturing...
blSts = ipc.Write
(
"{" +
"\"method\":\"startCapturing\"" +
"}"
);
if (!blSts)
{
TwainDirectSupport.Log.Error("Lost our process...");
goto ABORT;
}
// Get the result...
szJson = ipc.Read();
if (szJson == null)
{
TwainDirectSupport.Log.Error("Lost our process...");
goto ABORT;
}
#endregion
// Loop until we run out of images...
blEndOfJob = false;
aiImageBlockNum = null;
while (true)
{
// Get Session (wait for image)...
#region GetSession (wait for images)...
// Stay in this loop unti we get an image or an error...
while (true)
{
// Get the current session info...
blSts = ipc.Write
(
"{" +
"\"method\":\"getSession\"" +
"}"
);
if (!blSts)
{
TwainDirectSupport.Log.Error("Lost our process...");
goto ABORT;
}
// Get the result...
szJson = ipc.Read();
if (szJson == null)
{
TwainDirectSupport.Log.Error("Lost our process...");
goto ABORT;
}
// Parse it...
jsonlookup = new JsonLookup();
jsonlookup.Load(szJson, out lResponseCharacterOffset);
// Bail if we're end of job...
if (jsonlookup.Get("endOfJob") == "true")
{
blEndOfJob = true;
break;
}
// Collect the data...
try
{
aiImageBlockNum = null;
for (ii = 0; ; ii++)
{
// Get the data...
string szNum = jsonlookup.Get("session.imageBlocks[" + ii + "]");
if ((szNum == null) || (szNum == ""))
{
break;
}
// Convert it...
int iTmp = int.Parse(szNum);
// Add it to the list...
if (aiImageBlockNum == null)
{
aiImageBlockNum = new int[1];
aiImageBlockNum[0] = iTmp;
}
else
{
int[] aiTmp = new int[aiImageBlockNum.Length + 1];
aiImageBlockNum.CopyTo(aiTmp, 0);
aiTmp[aiTmp.Length - 1] = iTmp;
aiImageBlockNum = aiTmp;
}
}
}
catch
{
// don't need to do anything...
}
// We got one!
if (aiImageBlockNum != null)
{
break;
}
// Snooze a bit...
Thread.Sleep(100);
}
// Bail if we're end of job...
if (blEndOfJob)
{
break;
}
#endregion
// Read Image Block Metadata...
#region Read Image Block Metadata...
// Get this image's metadata...
blSts = ipc.Write
(
"{" +
"\"method\":\"readImageBlockMetadata\"," +
"\"imageBlockNum\":" + aiImageBlockNum[0] +
"}"
);
if (!blSts)
{
TwainDirectSupport.Log.Error("Lost our process...");
goto ABORT;
}
// Get the result...
szJson = ipc.Read();
if (szJson == null)
{
TwainDirectSupport.Log.Error("Lost our process...");
goto ABORT;
}
#endregion
// Read Image Block...
#region Read Image Block...
// Get this image...
blSts = ipc.Write
(
"{" +
"\"method\":\"readImageBlock\"," +
"\"imageBlockNum\":" + aiImageBlockNum[0] +
"}"
);
if (!blSts)
{
TwainDirectSupport.Log.Error("Lost our process...");
goto ABORT;
}
// Get the result...
szJson = ipc.Read();
if (szJson == null)
{
TwainDirectSupport.Log.Error("Lost our process...");
goto ABORT;
}
#endregion
// Release Image Block...
#region Release Image Block...
// Release this image...
blSts = ipc.Write
(
"{" +
"\"method\":\"releaseImageBlocks\"," +
"\"imageBlockNum\":" + aiImageBlockNum[0] + "," +
"\"lastImageBlockNum\":" + aiImageBlockNum[0] +
"}"
);
if (!blSts)
{
TwainDirectSupport.Log.Error("Lost our process...");
goto ABORT;
}
// Get the result...
szJson = ipc.Read();
if (szJson == null)
{
TwainDirectSupport.Log.Error("Lost our process...");
goto ABORT;
}
#endregion
}
// Stop Capturing...
#region Stop Capturing...
blSts = ipc.Write
(
"{" +
"\"method\":\"stopCapturing\"" +
"}"
);
if (!blSts)
{
TwainDirectSupport.Log.Error("Lost our process...");
goto ABORT;
}
// Get the result...
szJson = ipc.Read();
if (szJson == null)
{
TwainDirectSupport.Log.Error("Lost our process...");
goto ABORT;
}
#endregion
// Close Session...
#region Close Session...
// Close the scanner...
blSts = ipc.Write
(
"{" +
"\"method\":\"closeSession\"" +
"}"
);
if (!blSts)
{
TwainDirectSupport.Log.Error("Lost our process...");
goto ABORT;
}
// Get the result...
szJson = ipc.Read();
if (szJson == null)
{
TwainDirectSupport.Log.Error("Lost our process...");
goto ABORT;
}
// Exit the process...
blSts = ipc.Write
(
"{" +
"\"method\":\"exit\"" +
"}"
);
if (!blSts)
{
TwainDirectSupport.Log.Error("Lost our process...");
goto ABORT;
}
#endregion
// All done...
ABORT:
thread.Join();
return(true);
}
