title: Problem with Squid - Proxy authentication required
body: <p>I have web request that uses proxy (forward proxy) to website lets say www.example.com this web site has reverse proxy (Squid) as a result all my requests are returned as MISS.
  Is there any way to use forward proxy and retrieve the data ?</p>
  
  <p>Please understand that i am a newbie in this area.</p>
  
  <p>After reading a while i set no cashing and this what i got  </p>
  
  <p>This is <strong>Request</strong> </p>
  
  <pre><code>Command: GET
  URI: http://www.example.com
  ProtocolVersion: HTTP/1.1
  UserAgent:  Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.1.5) Gecko/20091102 Firefox/3.5.5
  Referer:  http://www.example.com
  Accept:  */*
  Accept-Charset:  ISO-8859-1,utf-8;q=0.7,*;q=0.7
  Accept-Encoding:  gzip,deflate
  Accept-Language:  en-us,en;q=0.5
  Keep-Alive:  115
  X-Requested-With:  XMLHttpRequest
  X-Prototype-Version:  1.7
  Expires:  Sun, 19 Nov 1978 05:00:00 GMT
  Host:  www.example.com
  Cookie:  
    PHPSESSID: 249477191de6048739cd8690fabd6060
    UTG: A-3345389704b26912f6d5422.73487509-0a3a0a26a100a113a119a24a1a4a77a7a6a      
    addOtr: 7L4L2
    CLIENT_WIDTH: 1916
    MAIN_WIDTH: 1726
  
  Cache-Control:  no-store,no-cache
  Pragma:  no-cache
  ProxyConnection:  Keep-Alive
  HeaderEnd: CRLF
  </code></pre>
  
  <p>This is <strong>Response</strong> </p>
  
  <pre><code>ProtocolVersion: HTTP/1.0
  StatusCode: 407, Proxy authentication required
  Reason: Proxy Authentication Required
  Server:  squid/3.0.STABLE19
  Mime-Version:  1.0
  Date:  Mon, 31 Jan 2011 19:04:44 GMT
  ContentType:  text/html
  ContentLength:  2986
  X-Squid-Error:  ERR_CACHE_ACCESS_DENIED 0
  ProxyAuthenticate: Basic realm="Anonymous proxy"
  Authenticate:  Basic realm="Anonymous proxy"
  X-Cache:  MISS from funky
  X-Cache-Lookup:  NONE from funky:2448
  Via:  1.0 funky (squid/3.0.STABLE19)
  ProxyConnection:  close
  HeaderEnd: CRLF 
  </code></pre>
  
  <p>Thanks in advance</p>