Printable Version

Discussion in 'C#' started by Gsx_Eclipse, Jul 24, 2006.

0
  1. #1
    I have a Printable Version feature on my website. It works great, but the problem is that it takes up to 10 seconds for the stripped version of content to load. This is quite annoying to visitors.

    On my asp pages I insert these comments before and after the content:

    <!-- content_starts_here //-->
    <!-- content_ends_here //-->

    Here is the code that actually does the work:
    <%@LANGUAGE=VBScript%>
    <%Option Explicit%>
    <% Response.Buffer = True
    Response.CacheControl = "Private"
    Response.Expires = -1
    If Request.ServerVariables("HTTP_REFERER") <> "" Then
    ' if this didn't come from anywhere, ignore.
    Dim strContent

    Dim xml_http
    Set xml_http = Server.CreateObject("Microsoft.XMLHTTP")
    xml_http.Open "GET", Request.ServerVariables("HTTP_REFERER"), False
    xml_http.Send
    strContent = xml_http.responseText
    Set xml_http = Nothing

    Dim regex
    Dim reg_matches
    Dim strtitle
    Dim strbody

    'On Error Resume Next
    ' Get the body
    Set regex = New RegExp
    regex.Pattern = "<!--\s+content_starts_here\s+\/\/-->(.|\n)*<!--\s+content_ends_here\s+\/\/-->"
    regex.IgnoreCase = True
    regex.Global = True
    strbody = strContent
    Set reg_matches = regex.Execute(strbody)
    If reg_matches.Count > 0 Then
    strbody = reg_matches.Item(0).Value
    End If
    Set regex = Nothing
    Set reg_matches = Nothing

    ' Get the title
    Set regex = New RegExp
    regex.Pattern = "<title>(.|\n)*<\/title>"
    regex.IgnoreCase = True
    regex.Global = True
    strtitle = strContent
    Set reg_matches = regex.Execute(strtitle)
    If reg_matches.Count > 0 Then
    strtitle = reg_matches.Item(0).Value
    End If
    Set regex = Nothing
    Set reg_matches = Nothing

    ' if we didn't get any different content, regex failed. So print
    ' out the existing content
    If strContent = strbody Then
    Response.Write strContent
    Else
    'Print the stripped version
    Response.Write "<html><head>" & strtitle & "</head><body>" & vbCrLf
    Response.Write "<base href=""" & GetBaseHref(Request.ServerVariables("HTTP_REFERER")) &""">" & vbCrLf
    Response.Write strbody
    Response.Write "<HR><center>" & Request.ServerVariables("HTTP_REFERER") & "</center></body></html>"
    End If
    End If

    '''Given a full URL, gets the base URL. Assumes that URLs to the
    '''default document is atleast terminated by /
    Function GetBaseHref(strURL)
    Dim arrParts, i
    arrParts = split(strURL,"/")
    GetBaseHref = ""
    For i = 0 To (UBound(arrParts)-1)
    GetBaseHref = GetBaseHref & arrParts(i) & "/"
    Next
    End Function
    %>

    Can someone please take a look and see what needs to be fixed in order to make the function happen more quickly? Also, what code would I need to add so that the stylesheet is applied?

    THANKS!
     
    Gsx_Eclipse, Jul 24, 2006 IP
  2. ludwig

    ludwig Notable Member

    Messages:
    2,253
    Likes Received:
    66
    Best Answers:
    0
    Trophy Points:
    225
    #2
    about the stylesheets they have a print version, do a search somewhere and you'll get how to do it

    about the code, do you have the info in the DB? if yes you better use the DB and not parse the code Microsoft.XMLHTTP
     
    ludwig, Jul 24, 2006 IP
  3. Free Born John

    Free Born John Guest

    Messages:
    111
    Likes Received:
    4
    Best Answers:
    0
    Trophy Points:
    0
    #3
    wow,

    some indenting and white space would make that a whole lot more readable.

    VB is notoriously slow with string handling so a regular expression is probably a very bad choice. You could achieve the same with the instr() and mid() functions, but you could probably do the whole thing just with the stylesheet by defining a print only stylesheet and declaring the bits you don't want to print as hidden.

    Try reading round - http://meyerweb.com/eric/articles/webrev/200001.html would be a good start.

    regards

    FBJ
     
    Free Born John, Jul 24, 2006 IP