Select with Feature Layer issue

Question

I???m brand new at developing with dojo and ArcGIS, so bear with me.  But I am sure enjoying what I am learning so far!

I looked through some other posts; but didn???t find someone with exactly the same issue I???ve had.  I???ve been attempting to create a project very similar to the ???Select with Feature Layer??? example in the Samples (under ???Query and Select???).

When I click on the ???View Live Sample??? link for this example, it works as expected.   I can click on the map, and a circle is drawn.  Then within the circle???s radius little pink dots appear for the different lots.

After I tried it online, I downloaded the source code; and attempted to run the web page on my own box, and then from our server.  But in both cases the result was the same:  I could click on the map, and the circle was drawn, but no pink dots appeared inside of it.

I thought I would also try using ???Explore in the sandbox???.  But I experienced the very same problem.  
What could I be missing?  Do I need to have my own copy of a certain file with the data for the pink dots?

Thanks,
jfedor

JosephFedor · Answer

Thanks, that was the issue.

In the chrome developer tools I can see that the POST to the proxy page is successful.  And (even better) the example works on our server!  I can see all the dots display just like it should.

But there still are some GET requests that aren't working (though they don�??t seem to be affecting performance at all).  
These are the errors I get:
XMLHttpRequest cannot load http://services.arcgisonline.com/ArcGIS/rest/info?f=json. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'my server' is therefore not allowed access. 
XMLHttpRequest cannot load http://sampleserver1.arcgisonline.com/ArcGIS/rest/info?f=json. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'my server' is therefore not allowed access.

I don�??t really understand why I these errors appear.  This is what my serverUrls array looks like in my proxy page:

[PHP]
  $serverUrls = array(
    array( 'url' => 'http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/', 'matchAll' => true, 'token' => '' ),
    array( 'url' => 'http://sampleserver2.arcgisonline.com/ArcGIS/rest/services/', 'matchAll' => true, 'token' => '' ),
    array( 'url' => 'http://sampleserver1a.arcgisonline.com/arcgisoutput/',        'matchAll' => true, 'token' => '' ),
    array( 'url' => 'http://sampleserver1b.arcgisonline.com/arcgisoutput/',        'matchAll' => true, 'token' => '' ),
    array( 'url' => 'http://sampleserver1c.arcgisonline.com/arcgisoutput/',        'matchAll' => true, 'token' => '' ),
 array( 'url' => 'http://services.arcgisonline.com/ArcGIS/rest/',    'matchAll' => true, 'token' => '' ),
 array( 'url' => 'http://tasks.arcgisonline.com/ArcGIS/rest/',    'matchAll' => true, 'token' => '' )
  );
[/PHP]

Thanks,
jfedor

JakubMalec · Answer

Your proxy error says that your curl extension for PHP is not enabled (curl is a library used for making http requests). To enable it, you simply need to uncomment "extension=php_curl.dll" (removing the ";" in the beginning) line in your php.ini file which is located in your PHP directory.

Also, remember to edit your proxy.php file and add approporiate hosts to the $serverUrls array or set the $mustMatch variable to false (not recommended).

JosephFedor · Answer

Thanks for responding so soon to my question. Sorry I haven�??t replied sooner. I don�??t have a proxy page set up; I think that�??s my problem. I attempted to add it but it�??s not working. So I�??ve been doing some debugging (with firebug and chrome tools) and I�??m getting a couple errors. When I first load up the page I get this error: XMLHttpRequest cannot load http://services.arcgisonline.com/ArcGIS/rest/info?f=json. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://inside_web' is therefore not allowed access. featureLayer.html:1 XMLHttpRequest cannot load http://sampleserver1.arcgisonline.com/ArcGIS/rest/info?f=json. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://inside_web' is therefore not allowed access. featureLayer.html:1 XMLHttpRequest cannot load http://tasks.arcgisonline.com/ArcGIS/rest/info?f=json. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://inside_web' is therefore not allowed access. featureLayer.html:1 I think it may be related to the proxy page. Then when I click on the map I get the error (described at the end of: https://developers.arcgis.com/en/javascript/jshelp/ags_proxy.html). Except it�??s not a 404 not found error. It�??s a 500 error that looks like this: r {stack: "Error: Unable to load proxy.php?http://sampleserve�?�uest.e (http://js.arcgis.com/3.8/init.js:160:133)", message: "Unable to load proxy.php?http://sampleserver1.arcg�?�ics/ESRI_Census_USA/MapServer/0/query status: 500", response: Object, status: 500, responseText: "cURL extension for PHP is not loaded!
Add th�?�tion>/ext"
extension = php_curl.dll"�?�} _ssl: undefined log: undefined message: "Unable to load proxy.php?http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Demographics/ESRI_Census_USA/MapServer/0/query status: 500" response: Object responseText: "cURL extension for PHP is not loaded!
Add the following lines to your php.ini file:
extension_dir = "/ext"
extension = php_curl.dll" stack: "Error: Unable to load proxy.php?http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Demographics/ESRI_Census_USA/MapServer/0/query status: 500�?� at Error ()�?� at new r (http://js.arcgis.com/3.8/init.js:221:367)�?� at r [as handleResponse] (http://js.arcgis.com/3.8/init.js:156:280)�?� at XMLHttpRequest.e (http://js.arcgis.com/3.8/init.js:160:133)" status: 500 xhr: XMLHttpRequest __proto__: a Anyway, that�??s where I�??m stuck at now. Thanks jfedor