[OpenLayers-Users] getting Feature Info data directly from .shpfiles

[Robert Sanson]

Why have you got FORMAT: 'png' for a GetFeatureInfo request in your click event?
 
I think you should work on getting a GetFeatureInfo request that works from your browser URL directly with Mapserver. Once you have the correct URL and a correct response from Mapserver, then you can work on implementing in OL.
 
regards,
 
Robert

>>> sunny74 <sb.ray at hotmail.com> 24/03/2010 3:00 a.m. >>>

Hi Bwoodall,

That example doesn't work.
I am using the GetfeatureInfo example of OL27.

My code is as follows:


<script type="text/javascript" language="javascript">
          var mapview, layer, layer1, map,base;

          OpenLayers.ProxyHost = "OL27/examples/proxy.cgi?url=";
//          var map = new OpenLayers.Map('map', );
          function init() {

              //alert("in init");
              map = new OpenLayers.Map('<%=map.ClientID%>',{
'maxResolution': 'auto' });

              //
              layer = new OpenLayers.Layer.WMS("OpenLayers WMS",
                "http://172.16.0.144:9000/cgi-bin/mapserv.exe?", { map:
'Shape/newwr1.map', layers: 'STATE', 'format': 'png' });

              layer1 = new OpenLayers.Layer.WMS("BASIC",
                "http://172.16.0.144:9000/cgi-bin/mapserv.exe?", { map:
'Shape/newwr1.map', transparent: 'true', layers: 'RailwayStations',
'format': 'png' });
             // base = new OpenLayers.Layer.WMS("Base",
"http://172.16.0.144:9000/cgi-bin/mapserv?map=Shape/newwr1.map", { layers:
["state"] });
              base = new OpenLayers.Layer.WMS("Base",
"http://mapsvr/cgi-bin/mapserv.exe?map=Shape/newwr1.map", { layers:
["STATE"] });

//              var wms = new OpenLayers.Layer.WMS("OpenLayers WMS",
              //       
"http://world.freemap.in/cgi-bin/mapserv?map=/www/freemap.in/world/map/factbook.map",
{ 'layers': 'factbook' });
              
              map.addLayers([layer, layer1,base]);
              map.zoomToMaxExtent();
              map.setCenter(new OpenLayers.LonLat(73.25, 20.35), 6);

              map.events.register('click', map, function(e) {
                  alert('clicked');
                  OpenLayers.Util.getElement('nodeList').innerHTML =
"Loading... please wait...";
                  var url = base.getFullRequestString({
                      REQUEST: "GetFeatureInfo",
                      EXCEPTIONS: "application/vnd.ogc.se_xml",
                      FORMAT: 'png',
                      BBOX: map.getExtent().toBBOX(),
                      X: e.xy.x,
                      Y: e.xy.y,
                      INFO_FORMAT: 'text/plain',
                      EPSG: 4326,
                      QUERY_LAYERS: "STATE",
                      FEATURE_COUNT: 6,
                      WIDTH: map.size.w,
                      HEIGHT: map.size.h
                  });
                  //  var msg = document.getElementById('urlmsg');
                  //  msg.value = url;
                  alert(url);
                  OpenLayers.loadURL(url, '', this, setHTML);
                  OpenLayers.Event.stop(e);
              });
               
          }

          function setHTML(response) {
              OpenLayers.Util.getElement('nodeList').innerHTML =
response.responseText;
          }


          
      
      </script>

But again this is throwing error:

#!/usr/bin/env python """This is a blind proxy that we use to get around
browser restrictions that prevent the Javascript from loading pages not on
the same server as the Javascript. This has several problems: it's less
efficient, it might break some sites, and it's a security risk because
people can use this proxy to browse the web and possibly do bad stuff with
it. It only loads pages via http and https, but it can load any content
type. It supports GET and POST requests.""" import urllib2 import cgi import
sys, os # Designed to prevent Open Proxy type stuff. allowedHosts =
['www.openlayers.org', 'openlayers.org', 'labs.metacarta.com',
'world.freemap.in', 'prototype.openmnnd.org', 'geo.openplans.org',
'sigma.openplans.org', 'www.openstreetmap.org'] method =
os.environ["REQUEST_METHOD"] if method == "POST": qs =
os.environ["QUERY_STRING"] d = cgi.parse_qs(qs) if d.has_key("url"): url =
d["url"][0] else: url = "http://www.openlayers.org" else: fs =
cgi.FieldStorage() url = fs.getvalue('url', "http://www.openlayers.org")
try: host = url.split("/")[2] if allowedHosts and not host in allowedHosts:
print "Status: 502 Bad Gateway" print "Content-Type: text/plain" print print
"This proxy does not allow you to access that location (%s)." % (host,)
print print os.environ elif url.startswith("http://") or
url.startswith("https://"): if method == "POST": length =
int(os.environ["CONTENT_LENGTH"]) headers = {"Content-Type":
os.environ["CONTENT_TYPE"]} body = sys.stdin.read(length) r =
urllib2.Request(url, body, headers) y = urllib2.urlopen(r) else: y =
urllib2.urlopen(url) # print content type header i = y.info() if
i.has_key("Content-Type"): print "Content-Type: %s" % (i["Content-Type"])
else: print "Content-Type: text/plain" print print y.read() y.close() else:
print "Content-Type: text/plain" print print "Illegal request." except
Exception, E: print "Status: 500 Unexpected Error" print "Content-Type:
text/plain" print print "Some unexpected error occurred. Error text was:", E 

Why are these erors comin?
How to solve?

thanks.
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