mohan reddy

To download the quiz files containing questions and answers using web services follow the steps mentioned below.

1. You need below mentioned parameters before calling webservice function moodle_file_get_files.

a)contextid

b)component

c)filearea

d)itemid

e)filepath

f)filename 

You will find values for above mentioned parameters from Moodle Table mdl_files.

SELECT * FROM moodle_apple.mdl_files;

2. Use the code to get information about the files.(below code helps to call the appropriate web service ,

you need add extra code for converting response  in to a file)

package com.exilant.moodle;

import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.ProtocolException;
import java.net.URL;

import javax.xml.parsers.ParserConfigurationException;

import org.xml.sax.SAXException;

/**
*
* @author Mohan Kumar B M
*/
public class Moodle {

public static void main(String[] args) throws ProtocolException,
IOException, ParserConfigurationException, SAXException {

final String token = "";
final String domainName = "";

String functionName = "moodle_file_get_files";
String urlParameters = "contextid=153&component=user&filearea=draft&itemid=803619384&filepath=/&filename=Quiz.txt";

String serverurl = domainName + "/webservice/rest/server.php"
+ "?wstoken=" + token + "&wsfunction=" + functionName;
HttpURLConnection con = (HttpURLConnection) new URL(serverurl)
.openConnection();
con.setRequestMethod("POST");
con.setRequestProperty("Content-Type",
"application/x-www-form-urlencoded");
con.setRequestProperty("Content-Language", "en-US");
con.setDoOutput(true);
con.setUseCaches(false);
con.setDoInput(true);
DataOutputStream wr = new DataOutputStream(con.getOutputStream());
wr.writeBytes(urlParameters);
wr.flush();
wr.close();

// Get Response
InputStream is = con.getInputStream();
BufferedReader rd = new BufferedReader(new InputStreamReader(is));
String line;
StringBuilder response = new StringBuilder();
while ((line = rd.readLine()) != null) {
response.append(line);
response.append('\r');
}
rd.close();
System.out.println(response.toString());

}

}

**Sorry i didn't get time to complete code for downloading file.

For any queries please email me at mkbmbattu@gmail.com.

Thanks,

Mohan Kumar B M

To access noodle web services soap/rest using java ,please follow below steps.

http://docs.moodle.org/dev/External_services_security#Steps_needed_to_configure_simple_web_service_access

1. Generate Token for any user in Moodle.

Token which is necessary for validating user against accessing webservices.

2. Enable any of the SOAP/REST/XML-RPC  Webservices in your Moodle setup.

3. Create a web service and add all the available web service functions to the newly created webservice.

4. Web service function name to be called and parameters to be passed .

Example:

String functionName = "moodle_user_get_users_by_id";
String urlParameters ="userids[0]=1";

String functionName = "moodle_group_get_course_groups";
String urlParameters ="courseid=3";

String functionName = "moodle_enrol_get_enrolled_users";
String urlParameters ="courseid=25";

String functionName = "moodle_group_get_groups";
String urlParameters ="groupids[0]=1";

String functionName = "moodle_group_get_course_groups";
String urlParameters ="courseid=1";

String functionName = "moodle_group_get_groupmembers";
String urlParameters ="groupids[0]=2";

String functionName = "moodle_course_get_courses";
String urlParameters ="";

5. Please find the Java code to access Moodle Rest service

package com.exilant.moodle;

import java.io.BufferedReader;

import java.io.DataOutputStream;

import java.io.IOException;

import java.io.InputStream;

import java.io.InputStreamReader;

import java.net.HttpURLConnection;

import java.net.ProtocolException;

import java.net.URL;

import javax.xml.parsers.ParserConfigurationException;

import org.xml.sax.SAXException;

/**

 * 

 * @author Mohan Kumar B M

 */

publicclass Moodle {

public static void main(String[] args) throws ProtocolException,

IOException, ParserConfigurationException, SAXException {

String token = "";

String domainName = "";

String functionName = "moodle_user_get_users_by_id";

String urlParameters = "userids[0]=1";

String serverurl = domainName + "/webservice/rest/server.php"

+ "?wstoken=" + token + "&wsfunction=" + functionName;

HttpURLConnection con = (HttpURLConnection) new URL(serverurl)

.openConnection();

con.setRequestMethod("POST");

con.setRequestProperty("Content-Type",

"application/x-www-form-urlencoded");

con.setRequestProperty("Content-Language", "en-US");

con.setDoOutput(true);

con.setUseCaches(false);

con.setDoInput(true);

DataOutputStream wr = new DataOutputStream(con.getOutputStream());

wr.writeBytes(urlParameters);

wr.flush();

wr.close();

// Get Response

InputStream is = con.getInputStream();

BufferedReader rd = new BufferedReader(new InputStreamReader(is));

String line;

StringBuilder response = new StringBuilder();

while ((line = rd.readLine()) != null) {

response.append(line);

response.append('\r');

}

rd.close();

System.out.println(response.toString());

}

}

For any queries please email me at mkbmbattu@gmail.com.

Thanks,

Mohan Kumar B M