CODEWITHSUNDEEP
vb.netxmldocument
FrustratedWDotNet
FrustratedWDotNet

Reputation: 63

Issue with XmlDocument

I've got an intermittent issue with a sub that goes off to read a twitter rss feed.

95% of the time, it behaves fine and without problems. The remaining 5% it gives me a 400 Bad Request error (even though the rss feed on Twitter is just fine, which suggests that the problem is at my end, not Twitter.)

Code:

Sub RetrieveStories()
   'Create a new xmldocument and load the xml into it
   Dim rssDoc As New XmlDocument
   rssDoc.Load("http://twitter.com/statuses/user_timeline/athersgeo.rss")

   'Select each item and put it into our array
   Dim nodes As XmlNodeList = rssDoc.SelectNodes("rss/channel/item")
   Dim i as integer = 1
   divMRSS.InnerHtml = ""
   Dim TweetText as string
   Dim TweetURL as string
   Dim UNameLen as integer = 15
   For Each node As XmlNode In nodes
      'Using xpath we can acess all the data we need in each node
      TweetURL = node.SelectSingleNode("link").InnerText
      TweetText = Mid(node.SelectSingleNode("title").InnerText,UNameLen)
      TweetText = Linkify(TweetText)
      TweetText = Atify(TweetText)
      TweetText = Hashify(TweetText)
      TweetText = "<a href=""http://twitter.com/athersgeo"" target=""_blank"">@athersgeo</a>: " & TweetText
      divMRSS.InnerHtml += "" & TweetText & "<BR><a href=""" & TweetURL & """ target=""_blank"">"  & RelativeTime(node.SelectSingleNode("pubDate").InnerText) & "</a><BR><HR>"
      i = i + 1

      If i = 5 then
        Exit For
      End if
   Next
End Sub

Is there something that I'm not closing/disposing of that's sucking up connections? Or have I just coded something blindingly stupid? (Which wouldn't be the first time!)

Upvotes: 1

Views: 114

Answers (1)

aravind
aravind

Reputation: 535

400 Bad Request is associated with HTTP. From your code it seems the only HTTP request is to load the xmlDocument rssDoc.Load("http://twitter.com/statuses/user_timeline/athersgeo.rss"). But you mention that - the rss feed on Twitter is just fine - how could you ensure that?
As suggested in this blog you could use Fiddler to explore your request going out to twitter - http://blogs.msdn.com/b/hakane/archive/2009/06/30/investigating-http-400-bad-request-errors-in-web-access.aspx

Upvotes: 1

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