Eric,
Here is a sample that uses esriRequest to get the info you are asking for:
<!DOCTYPE html>
<html>
<head>
<title>Get ArcGIS Server Map Service Layers</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<link rel="stylesheet" href="http://js.arcgis.com/3.13/esri/css/esri.css">
<style>
body{
font-family: "Arial Unicode MS, Arial, sans-serif";
}
#content {
width: 800px; height: 350px; padding: 5px; overflow: auto;
border: solid 2px #AAAAAA; background-color: #FFFFFF;
-moz-border-radius: 5px; -webkit-border-radius: 5px; -o-border-radius: 5px; border-radius: 5px;
-moz-box-shadow: 0 0 0.5em black; -webkit-box-shadow: 0 0 0.5em black; -o-box-shadow: 0 0 0.5em black; box-shadow: 0 0 0.5em black;
}
.failure { color: red; }
#status { font-size: 12px; }
</style>
<script src="http://js.arcgis.com/3.13/"></script>
<script>
require(["dojo/dom", "dojo/on", "dojo/dom-class", "dojo/_base/json", "dojo/_base/array", "dojo/string", "esri/request", "dojo/_base/lang", "dojo/domReady!"], function(dom, on, domClass, dojoJson, array, dojoString, esriRequest, lang) {
dom.byId("url").value = "http://sampleserver5.arcgisonline.com/ArcGIS/rest/services/Energy/Geology/MapServer/Layers";
dom.byId("content").value = "";
//handle the Go button's click event
on(dom.byId("submitRequest"), "click", getContent);
function getContent(){
var contentDiv = dom.byId("content");
contentDiv.value = "";
domClass.remove(contentDiv, "failure");
dom.byId("status").innerHTML = "Downloading...";
//get the url and setup a proxy
var url = dom.byId("url").value;
if(url.length === 0){
alert("Please enter a URL");
return;
}
var requestHandle = esriRequest({
"url": url,
"content": {
"f": "json"
},
"callbackParamName": "callback"
});
requestHandle.then(requestSucceeded, requestFailed);
}
function requestSucceeded(response, io){
var fieldInfo, layerInfo, pad, retval;
pad = dojoString.pad;
//toJson converts the given JavaScript object
//and its properties and values into simple text
dojoJson.toJsonIndentStr = " ";
console.log("response as text:\n", dojoJson.toJson(response,true));
dom.byId("status").innerHTML = "";
if ( response.hasOwnProperty("layers") ) {
layerInfo = array.map(response.layers, function(l) {
var lDomains = [];
retval = pad("Layer:", 8, " ", true) + l.name + "\n" + pad("", 104, "-", true) + "\n";
retval += pad(" Type Field Name:", 20, " ", true) + pad(l.typeIdField, 25, " ", true) + "\n";
fieldInfo = array.map(l.fields, lang.hitch(this, function(f) {
if(f.domain){
lDomains.push(pad(" Name", 10, " ", true) + pad(f.domain.name, 25, " ", true) +
pad("Type", 8, " ", true) + pad(f.domain.type, 25, " ", true));
}
return pad("Field:", 8, " ", true) + pad(f.name, 25, " ", true) +
pad("Alias:", 8, " ", true) + pad(f.alias, 30, " ", true) +
pad("Type:", 8, " ", true) + pad(f.type, 25, " ", true);
}));
if (lDomains.length > 0){
retval += pad(" Domains:", 12, " ", true) + "\n" + pad(" ", 102, "*", true) + "\n";
retval += lDomains.join("\n") + "\n" + pad(" ", 102, "*", true) + "\n";
}
return retval += fieldInfo.join("\n") + "\n" + pad("", 104, "-", true) + "\n\n";
});
dom.byId("content").value = layerInfo.join("\n");
}else{
dom.byId("content").value = "No layers found. Please double-check the URL.";
}
}
function requestFailed(error, io){
domClass.add(dom.byId("content"), "failure");
dojoJson.toJsonIndentStr = " ";
dom.byId("content").value = dojoJson.toJson(error, true);
}
});
</script>
</head>
<body>
<p>Enter the URL for a layer in a map service to access metadata about a layers in a map service using esriRequest.</p>
<p>
<input type="text" id="url" size="105"/>
<input id="submitRequest" type="button" value="GO" />
<span id="status"></span>
</p>
<p>
<h2>Content</h2>
<p>Check the console for the full response. Here we'll display Layer Name, Type Field Name, Field names, aliases and types:</p>
<textarea id="content"></textarea>
</p>
</body>
</html>
