topic Re: Basic Viewer Print Widget in IE in ArcGIS JavaScript Maps SDK Questions

Basic Viewer Print Widget in IE

PaulHoeffler — Wed, 17 Dec 2014 18:31:17 GMT

The print widget on the basic viewer produces output most of the time on Firefox and Chrome, but on IE the button does nothing and looking in the logs the following error is registered:

Error: esri.config.defaults.io.proxyUrl is not set. If making a request to a CORS enabled server, please push the domain into esri.config.defaults.io.corsEnabledServers.

I'm not using a proxy server and the print service that I'm using is on the same domain as the viewer.

Any thoughts on how to avoid the error and get the print widget working?

Thanks in advance,

Paul

Re: Basic Viewer Print Widget in IE

KellyHutchins — Mon, 22 Dec 2014 18:13:07 GMT

Based on the error message it sounds like you need to setup the proxy. Details on how to do so can be found here:

Esri/resource-proxy · GitHub

Re: Basic Viewer Print Widget in IE

PaulHoeffler — Tue, 30 Dec 2014 07:15:47 GMT

All services are on the same domain and Chrome and Firefox work fine without the proxy, but for some reason IE won't work without one. I can't reasonably have the proxy server installed on the web server due to institutional barriers; I'll play around with it some more, but any further thoughts on why IE is having trouble would be appreciated.

Re: Basic Viewer Print Widget in IE

larryzhang — Tue, 30 Dec 2014 09:25:04 GMT

paul,

What is your version of IE? Personally, Print may have bugs with IE 9.

Within my organization, the Print widget is not working in IE 9, but fine in IE 11.

Pls contact ESRI via the remedy for investigation.

Re: Basic Viewer Print Widget in IE

KellyHutchins — Tue, 30 Dec 2014 16:59:48 GMT

Which version of IE? CORs support wasn't added until IE10.

http://caniuse.com/#feat=cors

Re: Basic Viewer Print Widget in IE

PaulHoeffler — Tue, 30 Dec 2014 17:23:36 GMT

Larry,

Thank you for your response, it is IE 9. Unfortunately most of the machines within our organization are running IE 9, if someone is going to be using IE. Hopefully most are using Chrome, which is the other option here.

Re: Basic Viewer Print Widget in IE

PaulHoeffler — Tue, 30 Dec 2014 17:26:54 GMT

It is IE 9, and unfortunately that's the version of IE that will be on most employees' machines here.

If the web server hosting the viewer is on the same domain as the ArcGIS server hosting the web map export task I didn't think that I was using CORS - I may have a misunderstanding here?

If that's the case I'll read up on it further.

Re: Basic Viewer Print Widget in IE

KellyHutchins — Tue, 30 Dec 2014 17:40:27 GMT

If all the requests are to the same domain as the application then you don't have any cross domain requests and will not need a proxy.

However based on the error message you are seeing I suspect there is a cross domain request happening and it needs the proxy. In general its a good idea to setup a proxy and refer to it in your app. Then if needed it will use the proxy and if not needed it ignores it. I understand that this may not be possible in all organizations but it might be worth looking into it to see if you can get permissions to install the proxy on your web server.

Re: Basic Viewer Print Widget in IE

PaulHoeffler — Tue, 30 Dec 2014 18:01:34 GMT

I recognize that there are a number of benefits to using the proxy and I'll see about the possibility of having it installed, but security on the servers is rather tight.

The part that doesn't make sense to me is that the web export task is hosted internally and is not working (just in IE), but the geocoder that is hosted on ESRI servers (cross domain from the viewer) works fine. I tried switching the viewer to the ESRI web export task and it throws the same CORS/proxyURL error.

Thanks for taking the time to look at this.

Re: Basic Viewer Print Widget in IE

PaulHoeffler — Tue, 30 Dec 2014 18:10:52 GMT

I just realized that some of the layers in the map won't display in IE9 but work fine in Chrome and Firefox, I think I'll just have to advise people not to use the viewer with IE9.

Thanks again for taking the time, I know how maddening browser-specific issues are.

Best,

Paul

Re: Basic Viewer Print Widget in IE

KellyHutchins — Tue, 30 Dec 2014 18:28:33 GMT

Paul,

Strange about the layers not displaying in IE9. Any errors in the developer console? Perhaps this is worth logging a call to support so they can help troubleshoot the issue.

You asked why the geocoder worked but not the print task so thought I'd provide more info. Here's an old thread by Jian Huang that discusses some of the scenarios when you need a proxy and when you don't.

In the use cases he lists the geocode is covered by 2a. You can test this by running one of the geocode samples in IE9 while using something like Fiddler to inspect the network traffic and look for the jsonpCallback that Jian mentions. There's a bit of info in this wikipedia article on jsonp vs cors.

Re: Basic Viewer Print Widget in IE

PaulHoeffler — Tue, 30 Dec 2014 20:20:52 GMT

Thanks for the links, I'm reading them over now.

I find that with the print widget in Chrome and Firefox sometimes I get the output I expect, but often I don't get any output, and looking further I see there are CORS errors there - odd that it's sporadic, but I'll try to get the server-side CORS support and/or proxy installed on this end.

I do get a laundry list of errors in all browsers when the viewer loads, but I had been ignoring them to this point since it was functioning as expected. If you think they're relevant I'll post them, although please let me know if another thread or space would be more appropriate - I'm also looking into our organizational information for calling support.

Re: Basic Viewer Print Widget in IE

larryzhang — Wed, 31 Dec 2014 04:03:39 GMT

paul,

Ask ESRI via the remedy so that they log ...

The Print widget (not working with IE9) should have a bug, personally.

Re: Basic Viewer Print Widget in IE

larryzhang — Wed, 31 Dec 2014 04:14:58 GMT

kelly & paul,

Unlike 3D scene (requiring IE 11 or any WebGL-enabled browser like Chrome), the Print widget (not working with IE9) is certainly a bug. Personally, configuring the proxy or not should not be a cause for IE 9 not working (but IE 11 working).

+++++++++++

In fact, in most of the organizations, Chrome is not allowed (because of the security issues), and IE 9/10 is still a standard web browser...

Re: Basic Viewer Print Widget in IE

PaulHoeffler — Wed, 31 Dec 2014 16:43:37 GMT

I should have CORS support enabled on the server today and will report back on how it affects the issues in the browsers.

Currently I'm facing a more serious issue that the viewer does not fully load when one of the map layers is broken. I haven't been able to update the viewer code to the latest release yet, and don't know if it had any major changes that might address that. I noticed that a bit ago the API went from 3.11 to 3.12 and might try that first.

Re: Basic Viewer Print Widget in IE

KellyHutchins — Wed, 31 Dec 2014 17:48:15 GMT

Larry

I've done some testing with the print widget in IE9 and in my testing it works fine. There may be an issue in some scenarios that need to be resolved but we'd need more details on your particular situation. For example do you have a proxy setup and have you verified that the proxy is working?

Re: Basic Viewer Print Widget in IE

KellyHutchins — Wed, 31 Dec 2014 17:49:16 GMT

Paul,

The Basic Viewer doesn't have logic included to handle invalid layers. If the map contains invalid layers it won't load even in the most current version of the template.

Re: Basic Viewer Print Widget in IE

larryzhang — Thu, 01 Jan 2015 05:06:33 GMT

Thx, Kelly

The proxy setting in IE 9 is set up and controlled by the corporate Internet security personnel (not by workstation users). The proxy server is running fine.

Kelly,

Do you think it would be fine for IE 9 (Print widget), if we request IT to remove the restriction on ArcGIS Online from the company proxy server? If so, what kind of specific justifications (related to the Print widget from Web AppBuilder in ArcGIS Online) should be provided to Internet security to take actions?

+++++++++++

It looks that: when the same proxy is applied onto IE 11, the Print widget works; but not works for IE 9…

Do anyone else have same scenario?

Re: Basic Viewer Print Widget in IE

PaulHoeffler — Sat, 03 Jan 2015 01:29:08 GMT

Hi Kelly, does a property such as loaded or loadError exist for operationalLayers or a subset thereof? I'm not that familiar with the JS API and trying to add such logic, if possible, to keep invalid layers from the layers array within the _addLayers function. I realize this may not be possible. Thanks!

Re: Basic Viewer Print Widget in IE

HeikoHeijenga — Fri, 09 Jan 2015 23:44:28 GMT

To be clear on the cross-domain issues, see Same-origin policy for more information about same origin policy (i.e. a request from a page on web.mycompany.com to gis.mycompany.com is considered cross-domain).