topic Re: LayerList with token protected layer in ArcGIS JavaScript Maps SDK Questions

LayerList with token protected layer

MarcoRosa — Fri, 20 May 2016 14:59:35 GMT

Hi to all,

im going to set up Layer List in this way:

var llWidget = new LayerList({
                    map: map,
                    showLegend: true,
                    showOpacitySlider: true,
                    layers: [{
                        layer: mylayer,
                        id: "mylayerID",
                        subLayers: true
                    }]
                }, "layerList");
                llWidget.startup();

Note that mylayer becomes from a request for a token protected lite this:

var mylayer= new ArcGISDynamicMapServiceLayer(url_mylayer + "?token=" + token, {})

Doesn't work .... error is invalid tokens when request to legends it's made. How can i set layer to layer list in thic case ?

Where's the mistake?

Thank's in advanced to all

Re: LayerList with token protected layer

RobertScheitlin__GISP — Fri, 20 May 2016 15:09:54 GMT

GP,

Normally the advice from the JS API team for working with secured services is to use a proxy.

Using the proxy | Guide | ArcGIS API for JavaScript

Releases · Esri/resource-proxy · GitHub

Re: LayerList with token protected layer

JoelBennett — Fri, 20 May 2016 17:02:12 GMT

The Legend dijit is known to hiccup on layers having ?token= in their URL under some circumstances. If you use your browser's developer tools to monitor the network traffic, particularly for the legend request, and notice that "?token=" appears twice in the URL, there is a known workaround. If you have a locally hosted version of the API, you can tweak the esri/dijit/legend.js file to get around this issue. I discussed this in a separate thread at:

https://community.esri.com/thread/122680#comment-463137

Note that I wrote that up for version 3.12...if you have a different version of the API, the variable names could be different.

Re: LayerList with token protected layer

MarcoRosa — Mon, 23 May 2016 12:40:13 GMT

Hi Robert, yes im using proxy

Da: Robert Scheitlin, GISP

Inviato: venerdì 20 maggio 2016 17:11

A: Porta Giorgio <gporta@consodata.it>

Oggetto: Re: - LayerList with token protected layer

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LayerList with token protected layer

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Re: LayerList with token protected layer

MarcoRosa — Mon, 23 May 2016 12:41:25 GMT

Thank you Joel, then there is no solution if i use online api ? Im using 3.16 version now

Da: Joel Bennett

Inviato: venerdì 20 maggio 2016 19:03

A: Porta Giorgio <gporta@consodata.it>

Oggetto: Re: - LayerList with token protected layer

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LayerList with token protected layer

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Re: LayerList with token protected layer

JoelBennett — Mon, 23 May 2016 12:57:06 GMT

The preferred solution would be to get the API and host it yourself if possible and then make those tweaks...see the bottom of:

Get the ArcGIS API for JavaScript | Guide | ArcGIS API for JavaScript

If that's not an option, a less elegant solution would be to add "esri/dijit/Legend" to your require list. Then, right before your line:

var llWidget = new LayerList(

you could put

Legend.prototype._legendRequestServer = function(a) {

//all the same code as the original _legendRequestServer function

//except with the tweaks mentioned in the other thread

}

and also

Legend.prototype._buildRow_Tools = function(a, b, c, d, e) {

//all the same code as the original _buildRow_Tools function

//except with the tweaks mentioned in the other thread

}

You can get the original code for the legend class by downloading https://js.arcgis.com/3.16/esri/dijit/Legend.js

Re: LayerList with token protected layer

MarcoRosa — Mon, 23 May 2016 14:03:02 GMT

Thanks Robert,

i’ll try and i let you know.

Thanks at the moment

Giorgio

Da: Robert Scheitlin, GISP

Inviato: lunedì 23 maggio 2016 15:00

A: Porta Giorgio

Oggetto: Reply marked as helpful on LayerList with token protected layer

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LayerList with token protected layer

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Re: LayerList with token protected layer

MarcoRosa — Mon, 23 May 2016 15:12:02 GMT

Hi Robert,

done that …. Added require "esri/dijit/Legend", and modified code following istructions. Protected are correctly added to map , no more errors were generated but legend doesnt work correctly.

I can view just first layer without detailed options (layer styles / opacity)

Da: Robert Scheitlin, GISP

Inviato: lunedì 23 maggio 2016 15:00

A: Porta Giorgio <gporta@consodata.it>

Oggetto: Reply marked as helpful on LayerList with token protected layer

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LayerList with token protected layer

Re: LayerList with token protected layer

RobertScheitlin__GISP — Mon, 23 May 2016 15:38:29 GMT

GP,

It was Joel Bennett that recommended the workaround not me.

Re: LayerList with token protected layer

MarcoRosa — Mon, 23 May 2016 15:39:38 GMT

sorry

Da: Robert Scheitlin, GISP

Inviato: lunedì 23 maggio 2016 17:39

A: Porta Giorgio <gporta@consodata.it>

Oggetto: Re: - LayerList with token protected layer

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LayerList with token protected layer

Re: LayerList with token protected layer

MarcoRosa — Mon, 23 May 2016 15:48:38 GMT

Hi Joel,

done that …. Added require "esri/dijit/Legend", and modified code following istructions. Protected are correctly added to map , no more errors were generated but legend doesnt work correctly.

I can view just first layer without detailed options (layer styles / opacity)

Now in trying to download and install local api …. We’ll see

Da: Joel Bennett

Inviato: lunedì 23 maggio 2016 14:58

A: Porta Giorgio

Oggetto: Re: - LayerList with token protected layer

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LayerList with token protected layer

Re: LayerList with token protected layer

JoelBennett — Mon, 23 May 2016 16:02:37 GMT

Could you post the relevant portions of your code with the modifications included? In the case that it is correct, there may also be some additional requires I didn't think of initially.

Re: LayerList with token protected layer

JoelBennett — Mon, 23 May 2016 16:46:28 GMT

Yes, looking at it more closely, you're better off setting up the API locally and tweaking the one file. Trying the inline fix actually gets pretty nasty...those two functions are full of required modules...for example, in _legendRequestServer, I can see that:

c = dojo/_base/lang

l = dojo/json

d = dojo/_base/array

w = esri/request

There's more in the _buildRow_Tools function as well. It's possible to work with this, but very ugly, so I wouldn't recommend it. I apologize for sending you down that trail without fully thinking it through.

Re: LayerList with token protected layer

MarcoRosa — Tue, 24 May 2016 09:12:05 GMT

Hello Joel,

downloaded, installed local API and made workaround inside Legend.js as your suggestion, it works all fine.

Thanks a lot, hear from you soon,

Giorgio

Da: Joel Bennett

Inviato: lunedì 23 maggio 2016 18:47

A: Porta Giorgio

Oggetto: Re: - LayerList with token protected layer

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LayerList with token protected layer