+++ /dev/null
-/*
- * SCORM-1.2 API-Adapter Java Applet for ATutor
- * Copyright (c) Matthai Kurian
- *
- * Made for ATutor, the same license terms as for ATutor itself apply.
- *
- * This Applet handles communication between ATutor and SCORM-1.2
- * Sharable Content Objects (SCOs). Most communication is via Liveconnect.
- * CMI (Computer Managed Instruction) data is sent to ATutor through http POST
- * to an ATutor server side PHP script. SCORM-1.2 runtime behavior and CMI
- * datamodel management is done by the PfPLMS SCORM-1.2 API-Adapter Core.
- */
-
-import java.util.Hashtable;
-import java.util.Enumeration;
-import java.net.*;
-import java.io.*;
-
-public class ATutorApiAdapterApplet
- extends java.applet.Applet
- implements ch.ethz.pfplms.scorm.api.ApiAdapterInterface
-{
- private ch.ethz.pfplms.scorm.api.ApiAdapter core;
-
- private Hashtable ATutorScoCmi = new Hashtable();
-
- private String ATutorStudentId;
- private String ATutorStudentName;
-
- private String ATutorScoId;
- private String ATutorPreparedScoId;
-
- private boolean isVerbose = false;
-
- public ATutorApiAdapterApplet () {
- core = new ch.ethz.pfplms.scorm.api.ApiAdapter ();
- }
-
- public final void init () {
- if (getParameter("verbose") != null) isVerbose = true;
- ATutorStudentId = getParameter ("student_id");
- ATutorStudentName = getParameter ("student_name");
- say ("cmi.core.student_id=" +ATutorStudentId);
- say ("cmi.core.student_name=" +ATutorStudentName);
- }
-
- private final void say (String s) {
- if (isVerbose) System.out.println (s);
- }
-
- private final static String decode (String es) {
-
- String s = es.replace('+', ' ');
- int l = s.length();
-
- int a = 0;
-
- StringBuffer rv = new StringBuffer(l);
- byte[] b = null;
-
- try {
- int i;
- while ((i = s.indexOf('%', a)) >= 0) {
- rv.append(s.substring(a, i));
- a = i;
-
- while (i+2 < l && s.charAt(i) == '%') i+=3;
-
- if (b == null || b.length < (i-a)/3) {
- b = new byte[((i-a)/3)];
- }
-
- int x = 0;
- for (; a < i; a+=3) {
- b[x++] = (byte) Integer.parseInt(
- s.substring(a+1, a+3), 16
- );
- }
- rv.append(new String(b, 0, x, "utf-8"));
- }
-
- if (a < l) rv.append(s.substring(a));
- return rv.toString();
-
- } catch (Exception e) {
- return "";
- }
- }
-
- /*
- * Methods for ATutor to call via Liveconnect
- */
-
- public final void ATutorPrepare (String sco_id) {
- URLConnection po;
- ATutorScoCmi.clear();
- StringBuffer P = new StringBuffer();
- P.append ("&sco_id="+sco_id);
- say ("Retreiving cmi for sco="+sco_id+" from ATutor server");
- try {
- //po = (HttpURLConnection) ( new java.net.URL (
- po = (URLConnection) ( new java.net.URL (
- getCodeBase().toString() + "read.php"
- )).openConnection();
-
- po.setRequestProperty (
- "Content-Type",
- "application/x-www-form-urlencoded"
- );
- po.setRequestProperty (
- "Content-Length",
- Integer.toString (P.length())
- );
- po.setDoOutput (true);
- po.setUseCaches (false);
- //po.setRequestMethod ("POST");
- po.setAllowUserInteraction (false);
-
- OutputStream os = po.getOutputStream();
- os.write (P.toString().getBytes());
- os.flush ();
- os.close ();
-
- BufferedReader br = new BufferedReader(
- new InputStreamReader(
- po.getInputStream ()
- )
- );
- String s, l, r;
- while ((s=br.readLine())!=null) {
- if (s.indexOf('=') == -1) continue;
- l = s.substring (0, s.indexOf('='));
- r = s.substring (s.indexOf('=')+1, s.length());
- r = decode (r);
- say (" "+l + "="+r);
- ATutorScoCmi.put (l,r);
- }
- } catch (Exception e) {
- say ("ATutor cmi retrieval failed.");
- say (e.toString());
- }
- ATutorPreparedScoId = sco_id;
- say ("Done. Note: this was cmi for the next sco ("+sco_id+") to launch.");
- }
-
- public final void ATutorReset (String s) {
- if (s != null && s.equals(ATutorScoId)) {
- ATutorScoId = null;
- core.reset();
- say ("Reset by ATutor client.");
- }
- }
-
- private final String ATutorCommit (boolean fin) {
-
- if (ATutorScoId == null) return "false";
-
- core.transEnd();
- StringBuffer P = new StringBuffer();
- Hashtable ins = core.getTransNew ();
- Hashtable mod = core.getTransMod ();
- if (fin) {
- Object o = core.sysGet ("cmi.core.entry");
- if (o != null && o.toString().equals ("ab-initio")) {
- mod.put ("cmi.core.entry", "");
- }
- } else {
- core.transBegin();
- }
-
- P.append ("&sco_id=" +ATutorScoId);
-
- int i=0;
- for (Enumeration e = ins.keys(); e.hasMoreElements(); i++) {
- Object l = e.nextElement();
- Object r = ins.get(l);
- P.append("&iL["+i+"]="+l.toString());
- P.append("&iR["+i+"]="+URLEncoder.encode(r.toString()));
- }
-
- int u=0;
- for (Enumeration e = mod.keys(); e.hasMoreElements(); u++) {
- Object l = e.nextElement();
- Object r = mod.get(l);
- P.append("&uL["+u+"]="+l.toString());
- P.append("&uR["+u+"]="+URLEncoder.encode(r.toString()));
- }
-
- if (i == 0 && u == 0) {
- say ("Nothing to commit.");
- return "true";
- }
-
- //HttpURLConnection po;
- URLConnection po;
-
- try {
- //po = (HttpURLConnection) ( new java.net.URL (
- po = (URLConnection) ( new java.net.URL (
- getCodeBase().toString()
- + "write.php"
- )).openConnection();
-
- po.setRequestProperty (
- "Content-Type",
- "application/x-www-form-urlencoded"
- );
- po.setRequestProperty (
- "Content-Length",
- Integer.toString (P.length())
- );
- po.setDoOutput (true);
- po.setUseCaches (false);
- //po.setRequestMethod ("POST");
- po.setAllowUserInteraction (false);
-
- OutputStream os = po.getOutputStream();
- os.write (P.toString().getBytes());
- os.flush ();
- os.close ();
-
- BufferedReader r = new BufferedReader(
- new InputStreamReader(
- po.getInputStream ()
- )
- );
- try {
- String s;
- while ((s=r.readLine())!=null) {
- say(s);
- }
- } catch (EOFException ok) {}
- return "true";
-
- } catch (Exception e) {
- say ("ATutor cmi storage failed.");
- say (e.toString());
- return "false";
- }
- }
-
- public final String ATutorGetValue (String l) {
- String rv = core.LMSGetValue (l);
- say ("ATutorGetValue("+l+")="+rv);
- return rv;
- }
-
- /*
- * Liveconnect interface methods for SCO
- */
-
- public final String LMSInitialize (String s) {
- String rv = core.LMSInitialize(s);
- say ("LMSInitialize("+s+")="+rv);
- if (rv.equals("false")) return rv;
- core.reset();
- rv = core.LMSInitialize(s);
- ATutorScoId = ATutorPreparedScoId;
- core.sysPut ("cmi.core.student_id", ATutorStudentId);
- core.sysPut ("cmi.core.student_name", ATutorStudentName);
- core.sysPut (ATutorScoCmi);
- core.transBegin();
- return rv;
- }
-
- public final String LMSCommit (String s) {
- String rv = core.LMSCommit(s);
- if (rv.equals("false")) return rv;
- rv = ATutorCommit(false);
- say ("LMSCommit("+s+")="+rv);
- return rv;
- }
-
- public final String LMSFinish (String s) {
- String rv = core.LMSFinish(s);
- say ("LMSFinish("+s+")="+rv);
- if (rv.equals("false")) return rv;
- rv = ATutorCommit(true);
- ATutorScoId = null;
- core.reset();
- return rv;
- }
-
- public final String LMSGetDiagnostic (String e) {
- String rv = core.LMSGetDiagnostic (e);
- say ("LMSGetDiagnostic("+e+")="+rv);
- return rv;
- }
-
- public final String LMSGetErrorString (String e) {
- String rv = core.LMSGetErrorString (e);
- say ("LMSGetErrorString("+e+")="+rv);
- return rv;
- }
-
- public final String LMSGetLastError () {
- String rv = core.LMSGetLastError ();
- say ("LMSLastError()="+rv);
- return rv;
- }
-
- public final String LMSGetValue (String l) {
- String rv = core.LMSGetValue (l);
- say ("LMSGetValue("+l+")="+rv);
- return rv;
- }
-
- public final String LMSSetValue (String l, String r) {
- String rv = core.LMSSetValue (l, r);
- say ("LMSSetValue("+l+"="+r+")="+rv);
- return rv;
- }
-}
projects / atutor.git / blobdiff