Improved proxy error handling. Fixes issue #92.

The proxy now dies somewhat gracefully when given a malformed request.

The `Content-Length' header is now only matched by the parser if its
value is an integer.

A request with a null or missing HTTP version in the header now defaults
to HTTP/1.0

A request with a null or missing `Host' header returns:
  `ERROR: CrossDomain Request. The request was not sent.'
regardless of whether the host is specified in the URL.

extensions/proxy/proxy.rb

@@ -37,13 +37,19 @@ module BeEF
         def handle_request socket
           request_line = socket.readline
 
+          # HTTP method # defaults to GET
           method = request_line[/^\w+/]
-          url = request_line[/^\w+\s+(\S+)/, 1]
+
+          # HTTP version # defaults to 1.0
           version = request_line[/HTTP\/(1\.\d)\s*$/, 1]
+          version = "1.0" if version.nil?
+
+          # url # host:port/path
+          url = request_line[/^\w+\s+(\S+)/, 1]
 
           # We're overwriting the URI::Parser UNRESERVED regex to prevent BAD URI errors when sending attack vectors (see tolerant_parser)
           tolerant_parser = URI::Parser.new(:UNRESERVED => BeEF::Core::Configuration.instance.get("beef.extension.requester.uri_unreserved_chars"))
-          uri = tolerant_parser.parse(url)
+          uri = tolerant_parser.parse(url.to_s)
 
           raw_request = request_line
           content_length = 0

extensions/requester/api/hook.rb

@@ -65,16 +65,16 @@ module BeEF
 
             #@note: retrieve HTTP headers values needed later, and the \r\n that indicates the start of the post-data (if any)
             req_parts.each_with_index do |value, index|
-              if value.match(/^Content-Length/)
-                 @content_length = Integer(req_parts[index].split(/: /)[1])
+              if value.match(/^Content-Length:\s+(\d+)/)
+                 @content_length = Integer(req_parts[index].split(/:\s+/)[1])
               end
 
               if value.match(/^Host/)
-                 @host = req_parts[index].split(/: /)[1].split(/:/)[0]
-                 @port = req_parts[index].split(/: /)[1].split(/:/)[1]
+                 @host = req_parts[index].split(/:\s+/)[1].split(/:/)[0]
+                 @port = req_parts[index].split(/:\s+/)[1].split(/:/)[1]
               end
 
-              if value.eql?("") or value.strip.empty?# this will be the CRLF (before HTTP request body)
+              if value.eql?("") or value.strip.empty? # this will be the CRLF (before HTTP request body)
                 @post_data_index = index
               end
             end
@@ -111,7 +111,7 @@ module BeEF
               http_request_object = {
                   'id' => http_db_object.id,
                   'method' => verb,
-                  'host' => @host.strip,
+                  'host' => @host,
                   'port' => @port,
                   'data' => @post_data,
                   'uri' => uri,
@@ -123,7 +123,7 @@ module BeEF
               http_request_object = {
                   'id' => http_db_object.id,
                   'method' => verb,
-                  'host' => @host.strip,
+                  'host' => @host,
                   'port' => @port,
                   'uri' => uri,
                   'headers' => headers,