How to create a session in salesforce

Question

How to create or set a session in sales force.I am not using site.login for logging.I am manually checking username and password(Custom Field) and once checked.I have to create a session when navigating to another page

Answer 1

ONE OPTION -

First of all, create a Custom Label 'Login_Request' with value as-

<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:urn="urn:partner.soap.sforce.com"><soapenv:Header><urn:organizationId>@@@@OrgId@@@@</urn:organizationId></soapenv:Header><soapenv:Body><urn:login><urn:username>@@@@Username@@@@</urn:username><urn:password>@@@@Password@@@@</urn:password></urn:login></soapenv:Body></soapenv:Envelope>

Next inside apex class Create the below method to login into system and get Session ID -

public string GetOrgAccessToken() {
        string sessionId;
        string orgId = **18DIGIT_ORG_ID**;
        string suborgId=orgId.substring(0,15);
        string orgbody=Label.Login_Request.replace('@@@@OrgId@@@@',suborgId);
        string userbody=orgbody.replace('@@@@Username@@@@',pHeader.**USERNAME**);
        string Pwdbody=userbody.replace('@@@@Password@@@@',pHeader.**PASSWORD**);
        string body = Pwdbody;
        HttpRequest req = new HttpRequest();
        req.setEndpoint('https://LOGIN_OR_TEST.salesforce.com/services/Soap/u/29.0');
        req.setMethod('POST');
        req.setHeader('Content-Type', 'text/xml;charset=UTF-8');
        req.setHeader('SOAPAction', '""');
        req.setTimeOut(30000);
        req.setBody(body);
        Http p = new Http();
        HttpResponse res = p.send(req);
        loginResponse = res.getbody();
        Xmlstreamreader reader = new Xmlstreamreader(res.getbody());
        while (reader.hasNext()) {
            if (reader.getEventType() == XmlTag.Characters) {
                if (string.valueof(reader.getText()).startswith(suborgId + '!')) {
                    sessionId = reader.getText();
                }
                if(string.valueof(reader.getText()).startswith('https://')){
                    getTicketsEndpoint = reader.getText();
                }
            }
            reader.next();
        }
        return sessionId;
    }

Pay special attention and replace the bold text. Important parameters are 18 Digit org ID, Username, Password, Endpoint. Ensure that endpoint base URL is login.salesforce.com for Production or DEV org and test.salesforce.com for Sandboxes.