topic Re: Avoid Proxy page for Print Task, Print Template; Geometry Service in ArcGIS JavaScript Maps SDK Questions

Avoid Proxy page for Print Task, Print Template; Geometry Service

PitersonPaulgek — Wed, 09 Nov 2016 22:24:01 GMT

Hi there,

Is it possible to avoid using proxy page when

1) create pdf file with Print Task, Print Template?

2) use Geometry Service for Buffer

Any help would be appreciated.

esriConfig.defaults.geometryService = new GeometryService("some URL");

esriConfig.defaults.io.proxyUrl = "/proxy/"; - HERE WE MUST PUT CORRECT ADDRESS

esriConfig.defaults.io.alwaysUseProxy = false;

Re: Avoid Proxy page for Print Task, Print Template; Geometry Service

RobertScheitlin__GISP — Wed, 09 Nov 2016 23:26:55 GMT

Pieterson,

Any particular reason why? You do not have to use a proxy when using the PrintTask but the use the proxy will be necessary when buffering a complex polygon as the text limit for url params will likely be exceeded and the use of a put request will need to be made.

Re: Avoid Proxy page for Print Task, Print Template; Geometry Service

PitersonPaulgek — Wed, 09 Nov 2016 23:47:53 GMT

Thanks for reply, Robert.

How I configure PrintTask not to use proxy?

We have an error

init.js:140 GET http://localhost:55549/proxy/?https://user.domain.com/arcgis/rest/services/DownloadWebMap/GPServer/Export%20Web%20Map?f=json 404 (Not Found)

when run the JavaScript

app.printUrl = "some URL";
var printInfo = esriRequest({
"url": app.printUrl,
"content": { "f": "json" }
});

printInfo.then(handlePrintInfo, handleError);

function handlePrintInfo(resp) {
var layoutTemplate, templateNames, mapOnlyIndex, templates;

layoutTemplate = arrayUtils.filter(resp.parameters, function (param, idx) {
return param.name === "Template123";
});

if (layoutTemplate.length === 0) {
console.log("print service parameters name for templates must be \"Template123\"");
return;
}
templateNames = layoutTemplate[0].choiceList;

// remove the MAP_ONLY template then add it to the end of the list of templates
mapOnlyIndex = arrayUtils.indexOf(templateNames, "MAP_ONLY");
if (mapOnlyIndex > -1) {
var mapOnly = templateNames.splice(mapOnlyIndex, mapOnlyIndex + 1)[0];
templateNames.push(mapOnly);
}

// create a print template for each choice
templates = arrayUtils.map(templateNames, function (ch) {
var plate = new PrintTemplate();
plate.layout = plate.label = ch;
plate.format = "PDF";
plate.layoutOptions = {
"authorText": "Made by: ZZZ",
"copyrightText": "<copyright info here>",
"legendLayers": [],
"titleText": "<Test Title Here>",
"scalebarUnit": "Miles"
};
return plate;
});

// create the print dijit
app.printer = new Print({
"map": app.map,
"templates": templates,
url: app.printUrl
}, dom.byId("print_button"));
app.printer.startup();
}
function handleError(err) {
console.log("Something broke: ", err);
}

How I configure PrintTask not to use proxy?

Re: Avoid Proxy page for Print Task, Print Template; Geometry Service

RobertScheitlin__GISP — Thu, 10 Nov 2016 02:25:52 GMT

Piterson,

It sounds like you just need to configure your proxy url properly or just comment out those lines

esriConfig.defaults.io.proxyUrl = "/proxy/"; - HERE WE MUST PUT CORRECT ADDRESS

esriConfig.defaults.io.alwaysUseProxy = false;

The proxy should only be used when the text limit for the url params has been exceeded or you have that specific url setup in your proxy.config.

Re: Avoid Proxy page for Print Task, Print Template; Geometry Service

PitersonPaulgek — Thu, 10 Nov 2016 02:39:41 GMT

Robert,

I commented out

esriConfig.defaults.io.proxyUrl = "/proxy/"; - HERE WE MUST PUT CORRECT ADDRESS

esriConfig.defaults.io.alwaysUseProxy = false;

and now have an 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.
EsriVisualisation.js:576 Something broke: 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.
at Object.c.getProxyUrl (https://js.arcgis.com/3.17/init.js:701:63)
at u (https://js.arcgis.com/3.17/init.js:859:368)
at e (https://js.arcgis.com/3.17/init.js:864:490)
at z (https://js.arcgis.com/3.17/init.js:871:60)
at initialiseMap (http://localhost:55549/Scripts/EsriVisualisation.js:526:25)
at initApp (http://localhost:55549/Scripts/EsriVisualisation.js:195:9)
at http://localhost:55549/Scripts/EsriVisualisation.js:186:5
at ia (https://js.arcgis.com/3.17/init.js:28:3)
at https://js.arcgis.com/3.17/init.js:28:256
at ja (https://js.arcgis.com/3.17/init.js:28:125)

Re: Avoid Proxy page for Print Task, Print Template; Geometry Service

RobertScheitlin__GISP — Thu, 10 Nov 2016 03:41:01 GMT

Piterson,

So as the error message is saying you are attempting to connect to a server that is not the one the app is running on so you need to have the server you are contacting be CORS enabled and add that server to the esri.config.defaults.io.corsEnabledServers or you need to get your proxy configured properly to by-pass the need for CORS.

Re: Avoid Proxy page for Print Task, Print Template; Geometry Service

PitersonPaulgek — Thu, 10 Nov 2016 04:13:21 GMT

Robert,

Thank you. Could you provide more details how to

1) check "server you are contacting be CORS enabled"

2) and add that server to the esri.config.defaults.io.corsEnabledServers.

Re: Avoid Proxy page for Print Task, Print Template; Geometry Service

RobertScheitlin__GISP — Thu, 10 Nov 2016 04:57:49 GMT

It is 10 times easier to setup the proxy then to enable CORS on your server.

Re: Avoid Proxy page for Print Task, Print Template; Geometry Service

PitersonPaulgek — Thu, 10 Nov 2016 05:52:28 GMT

Should I

esri.config.defaults.io.corsEnabledServers.push("?????server.com");

if yes, what I do for local environment?

esri.config.defaults.io.corsEnabledServers.push("localhost:55549");

Re: Avoid Proxy page for Print Task, Print Template; Geometry Service

RobertScheitlin__GISP — Thu, 10 Nov 2016 13:18:44 GMT

Piterson,

Normally you would not have to add the machine that is running the app to the corsEnabledServers. It is the other servers (any other url you are using in your code). Is your web server the same machine as your ArcGIS Server?

Re: Avoid Proxy page for Print Task, Print Template; Geometry Service

PitersonPaulgek — Thu, 10 Nov 2016 21:42:19 GMT

Robert, our web server is different machine.

Re: Avoid Proxy page for Print Task, Print Template; Geometry Service

PitersonPaulgek — Thu, 10 Nov 2016 21:52:29 GMT

Robert,

Can you please clarify when you say "You do not have to use a proxy when using the PrintTask"

That means use CORS?

Can you please send link to working example that do not uses proxy and do not uses CORS?

Re: Avoid Proxy page for Print Task, Print Template; Geometry Service

RobertScheitlin__GISP — Thu, 10 Nov 2016 22:10:58 GMT

I am not sure what you have against using a proxy. But you will likely encounter a need to use one sooner rather than latter, once you get a service request that exceeds the URL params text limit.

But you will not need a proxy if your services and your web server are on the same machine and/or you have your server CORS enabled and added to the cots enabled servers array.

I don't have any examples for you right now.

Re: Avoid Proxy page for Print Task, Print Template; Geometry Service

AdrianMarsden — Sat, 02 Dec 2017 10:28:32 GMT

Similar with me.

I am trying to avoid the proxy (more later) all works fine, apart from printing in IE11 when I get the "If making a request to a CORS enabled server, please push the domain into esri.config.defaults.io.corsEnabledServers." - even through I do push the site that I am making a request to,

The reason why I'm switching proxy off, apart from performance, is that I just can't get my head around the config for testing, we now are using a proper version control in Visual Studio so I have to test using VS, and the "localhost" seems to fail, even when I change the config.

Although I'm going to look at why that is later, if I can move away totally it would be great.

Any ideas why just IE11 is having issues?