title: ASIHTTPRequestErrorDomain ： (possibly a bad/expired/self-signed certificate)
body: <p>When I access website API using https, the ASIHTTPRequest can't get response. I got the error below:</p>
  
  <blockquote>
    <p>ASI error：： Error Domain=ASIHTTPRequestErrorDomain Code=1 "A connection failure occurred: SSL problem (possibly a bad/expired/self-signed certificate)" UserInfo=0x4e5ccd0 {NSUnderlyingError=0x4e5ce40 "The operation couldn’t be completed. (OSStatus error -9807.)", NSLocalizedDescription=A connection failure occurred: SSL problem (possibly a bad/expired/self-signed certificate)}</p>
  </blockquote>
  
  <hr>
  
  <p>I guess I got this error because I generated the SSL certificate by myself, instead of purchasing one. Is that right? Does "SSL problem (possibly a bad/expired/self-signed certificate)} " mean i should purchase a SSL certificate for my server?</p>