Hi All, I apologize in advance if this question is already answered in a previous post. I have looked through many GetFeatureWFS (and proxy.cgi) related posts and have not found a solution to my problem as of yet - and it doesn't help that my coding skills have gone stale - so here goes....
I've been fiddling with the Openlayers WFS GetFeature capabilities for a little while, but have been having a hard time getting any results from it. At first, Firebug was giving me a lot of errors when I tried to select or hover over features, but I quickly found out about the need for the ProxyHost, and have downloaded the proxy.cgi from the Openlayers site and placed it in my /cgi-bin/ folder. After a lot of work with it, I believe I finally have that working - it's properly opening when directly referenced (though It could still be failing for other purposes). Now when I try to select features from my map, I'm no longer getting any 'red errors' in Firebug, but nothing is being selected and I'm still seeing some error messages (though no longer red) pop up in Firebug. The query appears to be sent to the server, but this is what is coming up as the response: Some unexpected error occurred. Error text was: 'CONTENT_LENGTH' Now, I'm guessing that I have something wrong with either my js or my proxy (or even possibly my mapfile), but I can't seem to find where the problem is. Anybody have any ideas? As for the environment details: I'm currently running my website on a Ubuntu 8.04 machine with Apache version 2.2, and am referencing the newest version of OpenLayers from their site. I will post the web and proxy code below, but if someone wants to play in my sandbox, please go right ahead : http://www.cemetermaps.ca/Simpletest.html www.cemeterymaps.ca/Simpletest.html . It only appears to work for Firefox right now - not IE. That's a completely separate issue that I will tackle later on . Any help would be appreciated - please let me know if you have any clarification questions for me. Thanks, Chris CODE Website code -- ----------------- <html xmlns="http://www.w3.org/1999/xhtml";> <head> <link rel="stylesheet" href="http://openlayers.org/api/theme/default/style.css"; type="text/css" /> <style type="text/css"> #map { width: 640px; height: 480px; border: 1px solid black; } div.olControlScaleLine { color: black; font-family: Arial; font-size: 0.8em; background-color: white; } </style> <script src="http://openlayers.org/api/OpenLayers.js";></script> <!-- /OpenLayers.js"></script> --> <script type="text/javascript"> <!-- var map, scaleline, cemlayer, photoLayer, vectorLayer, select, hover, control; function init(){ OpenLayers.ProxyHost = "/cgi-bin/proxy.cgi?url="; map = new OpenLayers.Map('map', {maxExtent: new OpenLayers.Bounds(570745.457020642, 4843274.70626104, 570993.457787, 4843505.93442523), maxResolution: 0.5, units: 'm', projection: "EPSG:32617", isbaselayer:false, numZoomLevels: 10, tileSize: new OpenLayers.Size(0.005, 0.005)});//new OpenLayers.Map('map'); 156543 var bounds = new OpenLayers.Bounds(); //-80.121444 43.739134 -80.118334 43.741192 bounds.left = 570745.457020642; //-80.121444; // bounds.bottom = 4843274.70626104; //43.739134; // bounds.right = 570993.457787; //-80.118334; // bounds.top = 4843505.93442523; //43.741192; // map.setOptions({restrictedExtent: bounds}); //Sets it so you can't zoom or pan off of the map surface scaleline = new OpenLayers.Control.ScaleLine({maxWidth: 100}); //creates the scale line cemlayer = new OpenLayers.Layer.WMS( "Coningsby Test", "http://192.168.1.66/cgi-bin/mapserv?map=%2F%2Fhome%2Fchris%2FCemeterySite%2Fmapdata%2Fconingsby_test.map&SERVICE=WMS&VERSION=1.1.1&REQUEST=&REQUEST=GetMap&LAYERS=Cem_Photo,coningsby&STYLES=&SRS=EPSG:32617&FORMAT=image/png";, {layers: 'Cem_Photo,Coningsby'}, {singleTile: true}, {maxExtent: bounds}, {units: 'm'}, {isBaseLayer: true}); //WORKING - doesn't need the image size or bounds in the connection string select = new OpenLayers.Layer.Vector("Selection", {styleMap: new OpenLayers.Style(OpenLayers.Feature.Vector.style["select"]) }); hover = new OpenLayers.Layer.Vector("Hover"); control = new OpenLayers.Control.GetFeature({ protocol: OpenLayers.Protocol.WFS.fromWMSLayer(cemlayer), box: true, hover: true, multipleKey: "ctrlKey", toggleKey: "altKey" }); //alert("Message1!"); control.events.register("featureselected", this, function(e) { select.addFeatures([e.feature]); //alert("Message2!"); }); control.events.register("featureunselected", this, function(e) { select.removeFeatures([e.feature]); //alert("Message3!"); }); control.events.register("hoverfeature", this, function(e) { hover.addFeatures([e.feature]); //alert("Message4!"); }); control.events.register("outfeature", this, function(e) { hover.removeFeatures([e.feature]); //alert("Message5!"); }); //map.addLayer(photoLayer); map.addLayer(cemlayer); map.addLayers([hover, select]); map.addControl(scaleline); //adds the scaleline map.addControl(new OpenLayers.Control.LayerSwitcher()); map.addControl(control); //Adds the GetFeature material control.activate(); map.zoomToExtent(bounds); //Will zoom to the 'area' of the cemetery when using dd instead of UTM } --> </script> </head> <body onload="init()"> <div id="map"></div> <div id="scaleline"></div> </body> </html> ------------------------Proxy.cgi Code -------------------------------- #!/usr/bin/env python 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', 'demo.opengeo.org', 'www.openstreetmap.org', 'www.cemeterymaps.ca', '192.168.1.66'] method = os.environ["REQUEST_METHOD"] if method == "POST": qs = os.environ["REQUEST_METHOD"] 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] #Gets rid of the http or https 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"]) print y.read() y.close() else: print "Content-type: text/plain\n\n" print print y.read() y.close() else: print "Content-type: text/plain\n\n" print print "Illegal request." except Exception, E: print "Status: 500 Unexpected Error" print "Content-type: text/plain\n\n" print print "Some unexpected error occurred. Error text was:", E -- View this message in context: http://osgeo-org.1803224.n2.nabble.com/Another-GetFeatureWFS-Possible-Proxy-Issue-CONTENT-LENGTH-tp5024916p5024916.html Sent from the OpenLayers Users mailing list archive at Nabble.com. _______________________________________________ Users mailing list Users@openlayers.org http://openlayers.org/mailman/listinfo/users
