Saleforce REST API Sample Request/Response

salesforce-rest-api-sample-request-response.js

public class ConnectToSalesforceRestApi {

  public static void run(){
    String endpoint='https://login.salesforce.com/services/oauth2/token';
    // or use this endpoint for a sandbox org:
    // String endpoint='https://test.salesforce.com/services/oauth2/token';
    String username = 'salesforce-usename@company.com';
    String password = 'salesforce-password';
    String CONSUMER_KEY = 'clientId';
    String CONSUMER_SECRET = 'clientSecret';

    Httprequest request = new HttpRequest();
    request.setMethod('POST');
    request.setHeader('Content-Type','application/x-www-form-urlencoded');

    request.setBody(
      'grant_type=password' +
      '&client_id=' + CONSUMER_ID +
      '&client_secret=' + CONSUMER_SECRET +
      '&username=' + username +
      '&password=' + password
    );
    request.setEndpoint(endpoint);

    Http http = new Http();
    HttpResponse response;
    String accessToken;

    try {
      response = http.send(request);
      System.debug('body: ' + response.getBody());
      accessToken = parseResponseForAccessToken(response.getBody());
    } catch(System.CalloutException error){
      System.debug('error: ' + error);
    }

    System.debug('access token: ' + accessToken);
    // be careful as the following line will print sensitive credentials to the logs
    // System.debug(UserInfo.getOrganizationId().substring(0, 15) + ' ' +  UserInfo.getSessionId().substring(15));

    query(accessToken);
  }

  private static String parseResponseForAccessToken(String responseBody) {
    String accessToken;

    JSONParser parser = JSON.createParser(responseBody);
    while (parser.nextToken() != null) {
      if ((parser.getCurrentToken() == JSONToken.FIELD_NAME) && (parser.getText() == 'access_token')) {
        parser.nextToken();
        accessToken = parser.getText();
        }
      }
    return accessToken;
  }

  private static void query(String accessToken) {
    // this endpoint allows us to append a SOQL query to retrieve specific data
    // see the documentation for a complete list of endpoints
    String endpoint = 'https://yourinstance.salesforce.com/services/data/v20.0/query/?q=SELECT+name+from+account+limit+1';
    Httprequest request = new HttpRequest();
    Http http = new Http();
    HttpResponse response;

    request.setEndpoint(endpoint);
    request.setMethod('GET');
    // we can use either of the two below lines for content Type.
    // request.setHeader('Content-Type','application/json');
    request.setHeader('Content-Type','application/x-www-form-urlencoded');
    request.setHeader('Authorization','Bearer ' + accessToken);

    response = http.send(request);
    // => {"totalSize":1,"done":true,"records":[{"attributes":{"type":"Account","url":"/services/data/v20.0/sobjects/Account/0014000000xVKZgAAO"},"Name":"Jane Doe"}]}
    System.debug('body: ' + response.getBody());
  }
}