Twitter + Scribe + Cannot get String from a null object

Question

I am trying to use scribe for authorization with twitter. When I try

requestToken = service.getRequestToken()

I get following error

14:10:11,305 ERROR [ajp-bio-8009-exec-4][IncludeTag:154]   java.lang.IllegalArgumentException: Cannot get String from a null object
    at org.scribe.utils.Preconditions.check(Preconditions.java:80)
    at org.scribe.utils.Preconditions.checkNotNull(Preconditions.java:27)
    at org.scribe.utils.StreamUtils.getStreamContents(StreamUtils.java:20)
    at org.scribe.model.Response.parseBodyContents(Response.java:40)
    at org.scribe.model.Response.getBody(Response.java:66)
    at org.scribe.oauth.OAuth10aServiceImpl.getRequestToken(OAuth10aServiceImpl.java:59)
    at org.apache.jsp.html.portlet.login.login_jsp._jspService(login_jsp.java:2432)
    at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
    at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
    at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
    at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
    at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:72)
    at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:116)
    at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilter.doFilter(InvokerFilter.java:73)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)

I tried the answer mentioned in following posts but nothing worked

scribe + twitter > Cannot get String from a null object

Whenever I am trying to include TwitterApi.SSL.class or TwitterApi.Authenticate.class, it is giving me "cannot be resolved to a type" error.

Did anybody experience this issue ?

Answer 1

Use .provider(TwitterApi.SSL.class) instead .provider(TwitterApi.class). It should work.

Answer 2

Please check which Scribe version you are using. According to their ChangeLog page, SSL support was only added during version 1.2, so your jar will not contain the SSL class if it's from an older version. https://github.com/fernandezpablo85/scribe-java/blob/master/changelog.txt

Downloading the latest jar will solve your problem :)