Step 1: Logging In Using the SOAP API

The Bulk API doesn't provide a login operation, so you must use SOAP API to log in.

To log in to Salesforce using cURL:

1. Create a text file called login.txt containing the following text:
   1<?xml version="1.0" encoding="utf-8" ?>
   2<env:Envelope xmlns:xsd="http://www.w3.org/2001/XMLSchema"
   3    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
   4    xmlns:env="http://schemas.xmlsoap.org/soap/envelope/">
   5  <env:Body>
   6    <n1:login xmlns:n1="urn:partner.soap.sforce.com">
   7      <n1:username>your_username</n1:username>
   8      <n1:password>your_password</n1:password>
   9    </n1:login>
   10  </env:Body>
   11</env:Envelope>

2. Replace your_username and your_password with your Salesforce user name and password.
3. Using a command-line window, execute the following cURL command:
   1curl https://login.salesforce.com/services/Soap/u/33.0 -H "Content-Type: text/xml; charset=UTF-8" -H "SOAPAction: login" -d @login.txt

   The Soap/u/ portion of the URI specifies the partner WSDL. You can use Soap/c/ to specify the enterprise WSDL.

4. Salesforce returns an XML response that includes <sessionId> and <serverUrl> elements. Note the values of the <sessionId> element and the first part of the host name (instance), such as na1-api, from the <serverUrl> element. Use these values in subsequent requests to the Bulk API.