POST method returns a 414 - Request uri too long error when passing complex geometry.

[BobCarberry]

I am trying to perform a query operation on a layer in a mapservice by passing in a geometry of type polygon.  The passed in geometry is used to intersect the layer and return the records that the geometry intersected. This works fine for simple geometry however, when I try passing in a complex geometry (one with many vertices, like a curve), I get an error 414 - Request too long.  I am performing this function in a .NET webservice using the POST method for an HttpWebRequest.  What's interesting is if I use the interface on server and copy/paste the geometry string, and clicking POST, it works fine.  Any ideas?

[RichardWatson · Accepted solution]

Put the arguments in body and not the URI.

[BobCarberry]

Thanks for your reply, Richard however I believe I am writing to the body, here is my code:

    Private Shared Function PostIt(ByVal baseUrl As String, ByVal input As String) As String
        Dim responseString As String
        Dim request As HttpWebRequest
        Dim response As HttpWebResponse = Nothing
        Dim reader As StreamReader

        Dim byteData() As Byte
        Dim postStream As Stream = Nothing

        request = DirectCast(WebRequest.Create(baseUrl + input), HttpWebRequest)
        ' Set type to POST 
        request.Method = "POST"
        request.ContentType = "application/x-www-form-urlencoded"
        ' Create a byte array of the data we want to send 
        byteData = UTF8Encoding.UTF8.GetBytes(input)
        ' Set the content length in the request headers 
        request.ContentLength = byteData.Length

        Try

            postStream = request.GetRequestStream()
            postStream.Write(byteData, 0, byteData.Length)
        Finally

            If Not postStream Is Nothing Then postStream.Close()
        End Try

    
        Try

            ' Get response 
          '(CRASHES HERE)  response = DirectCast(request.GetResponse(), HttpWebResponse)  '(CRASHES HERE)

            ' Get the response stream into a reader 

            reader = New StreamReader(response.GetResponseStream())

            responseString = reader.ReadToEnd

        Catch

        Finally

            If Not response Is Nothing Then response.Close()

        End Try



        Return responseString

    End Function

[RichardWatson]

What is the length?

Check out the following file:

C:\Program Files\ArcGIS\Server\framework\runtime\tomcat\conf\server.xml

This file seems to define a number of limits for the embedded web server used by ArcGIS Server:

    <Connector connectionTimeout="20000" maxHttpHeaderSize="65535" maxPostSize="10485760" port="6080" protocol="HTTP/1.1" redirectPort="6443" server=" "/>

[BobCarberry]

The length is 24179. I don't seem to have that file, I'm running Server 10.0.

[RichardWatson]

        request = DirectCast(WebRequest.Create(baseUrl + input), HttpWebRequest)

Looks like you are putting the information in the URI and in the body.  Right?

[BobCarberry]

Yes, I think so.

[RichardWatson]

Take the arguments out of the URI. 

Hopefully that should fix your size problem because the size of your URI should be less than 100 characters versus over 24,000.

[BobCarberry]

Richard,

You are a gentleman and a scholar!  After almost a week of wrestling around with this, your suggestion worked! Thanks!

Here is the solution if any one is interested:

Perform a query on a layer in mapservice in vb.NET using the REST API:

baseUrl = "http://<Server Name>/ArcGIS/rest/services/<Map Service Name>/MapServer/<Layer ID>/query"

input =        "&geometry=" + <geometry> + _
                   "&geometryType=esriGeometryPolygon" + _
                   "&inSR=" + _
                   "&spatialRel=esriSpatialRelIntersects" + _
                   "&relationParam=" + _
                   "&objectIds=" + _
                   "&where=" + _
                   "&time=" + _
                   "&returnIdsOnly=false" + _
                   "&returnGeometry=true" + _
                   "&maxAllowableOffset=" + _
                   "&outSR=" + _
                   "&outFields=*" + _
                   "&f=json"

Private Shared Function PostIt(ByVal baseUrl As String, ByVal input As String) As String
        Dim responseString As String
        Dim request As HttpWebRequest
        Dim response As HttpWebResponse = Nothing
        Dim reader As StreamReader

        Dim byteData() As Byte
        Dim postStream As Stream = Nothing

        request = DirectCast(WebRequest.Create(baseUrl), HttpWebRequest)
        ' Set type to POST 
        request.Method = "POST"
        request.ContentType = "application/x-www-form-urlencoded"
        ' Create a byte array of the data we want to send 
        byteData = UTF8Encoding.UTF8.GetBytes(input)
        ' Set the content length in the request headers 
        request.ContentLength = byteData.Length

        Try

            postStream = request.GetRequestStream()
            postStream.Write(byteData, 0, byteData.Length)
        Finally

            If Not postStream Is Nothing Then postStream.Close()
        End Try

    
        Try

            ' Get response 
            response = DirectCast(request.GetResponse(), HttpWebResponse)

            ' Get the response stream into a reader 

            reader = New StreamReader(response.GetResponseStream())

            responseString = reader.ReadToEnd

        Catch

        Finally

            If Not response Is Nothing Then response.Close()

        End Try



        Return responseString

    End Function

[AlanEpp]

Bob, thanks for posting your solution.  YOU saved ME a boatload of time and angst!
Al