Blazor (self-hosted) WASM - SetInstrumentationKey

[Llewellyn Kruger]

Thanks for this great plugin.

I'm programmatically setting the instrumentation key in the program.cs file using applicationInsights.SetInstrumentationKey method.
Using your BlazorApplicationInsights.Sample project; set the index.html's instrumentationKey = "" and add the following line to the AI section in program.cs

await applicationInsights.SetInstrumentationKey("AI KEY GOES HERE");

This works, however I can see an HTTP 400 error to a url "https://dc.services.visualstudio.com/v2/track" in the console.

The only reference I can find in the solution to this Url is in BlazorApplicationInsights.Tests project. If I remove the project, the error goes away. If I bring the project back in, the error returns.
Could you investigate?

The details of the error are below. Note that the Nuget release v2.1 is affected by this problem from what I can see too.

Instrument.js:97

To replicate this error, modify your index.html and set instrumentationKey: "".

    <script type="text/javascript">
        !function (T, l, y) { var S = T.location, k = "script", D = "instrumentationKey", C = "ingestionendpoint", I = "disableExceptionTracking", E = "ai.device.", b = "toLowerCase", w = "crossOrigin", N = "POST", e = "appInsightsSDK", t = y.name || "appInsights"; (y.name || T[e]) && (T[e] = t); var n = T[t] || function (d) { var g = !1, f = !1, m = { initialize: !0, queue: [], sv: "5", version: 2, config: d }; function v(e, t) { var n = {}, a = "Browser"; return n[E + "id"] = a[b](), n[E + "type"] = a, n["ai.operation.name"] = S && S.pathname || "_unknown_", n["ai.internal.sdkVersion"] = "javascript:snippet_" + (m.sv || m.version), { time: function () { var e = new Date; function t(e) { var t = "" + e; return 1 === t.length && (t = "0" + t), t } return e.getUTCFullYear() + "-" + t(1 + e.getUTCMonth()) + "-" + t(e.getUTCDate()) + "T" + t(e.getUTCHours()) + ":" + t(e.getUTCMinutes()) + ":" + t(e.getUTCSeconds()) + "." + ((e.getUTCMilliseconds() / 1e3).toFixed(3) + "").slice(2, 5) + "Z" }(), iKey: e, name: "Microsoft.ApplicationInsights." + e.replace(/-/g, "") + "." + t, sampleRate: 100, tags: n, data: { baseData: { ver: 2 } } } } var h = d.url || y.src; if (h) { function a(e) { var t, n, a, i, r, o, s, c, u, p, l; g = !0, m.queue = [], f || (f = !0, t = h, s = function () { var e = {}, t = d.connectionString; if (t) for (var n = t.split(";"), a = 0; a < n.length; a++) { var i = n[a].split("="); 2 === i.length && (e[i[0][b]()] = i[1]) } if (!e[C]) { var r = e.endpointsuffix, o = r ? e.location : null; e[C] = "https://" + (o ? o + "." : "") + "dc." + (r || "services.visualstudio.com") } return e }(), c = s[D] || d[D] || "", u = s[C], p = u ? u + "/v2/track" : d.endpointUrl, (l = []).push((n = "SDK LOAD Failure: Failed to load Application Insights SDK script (See stack for details)", a = t, i = p, (o = (r = v(c, "Exception")).data).baseType = "ExceptionData", o.baseData.exceptions = [{ typeName: "SDKLoadFailed", message: n.replace(/\./g, "-"), hasFullStack: !1, stack: n + "\nSnippet failed to load [" + a + "] -- Telemetry is disabled\nHelp Link: https://go.microsoft.com/fwlink/?linkid=2128109\nHost: " + (S && S.pathname || "_unknown_") + "\nEndpoint: " + i, parsedStack: [] }], r)), l.push(function (e, t, n, a) { var i = v(c, "Message"), r = i.data; r.baseType = "MessageData"; var o = r.baseData; return o.message = 'AI (Internal): 99 message:"' + ("SDK LOAD Failure: Failed to load Application Insights SDK script (See stack for details) (" + n + ")").replace(/\"/g, "") + '"', o.properties = { endpoint: a }, i }(0, 0, t, p)), function (e, t) { if (JSON) { var n = T.fetch; if (n && !y.useXhr) n(t, { method: N, body: JSON.stringify(e), mode: "cors" }); else if (XMLHttpRequest) { var a = new XMLHttpRequest; a.open(N, t), a.setRequestHeader("Content-type", "application/json"), a.send(JSON.stringify(e)) } } }(l, p)) } function i(e, t) { f || setTimeout(function () { !t && m.core || a() }, 500) } var e = function () { var n = l.createElement(k); n.src = h; var e = y[w]; return !e && "" !== e || "undefined" == n[w] || (n[w] = e), n.onload = i, n.onerror = a, n.onreadystatechange = function (e, t) { "loaded" !== n.readyState && "complete" !== n.readyState || i(0, t) }, n }(); y.ld < 0 ? l.getElementsByTagName("head")[0].appendChild(e) : setTimeout(function () { l.getElementsByTagName(k)[0].parentNode.appendChild(e) }, y.ld || 0) } try { m.cookie = l.cookie } catch (p) { } function t(e) { for (; e.length;)!function (t) { m[t] = function () { var e = arguments; g || m.queue.push(function () { m[t].apply(m, e) }) } }(e.pop()) } var n = "track", r = "TrackPage", o = "TrackEvent"; t([n + "Event", n + "PageView", n + "Exception", n + "Trace", n + "DependencyData", n + "Metric", n + "PageViewPerformance", "start" + r, "stop" + r, "start" + o, "stop" + o, "addTelemetryInitializer", "setAuthenticatedUserContext", "clearAuthenticatedUserContext", "flush"]), m.SeverityLevel = { Verbose: 0, Information: 1, Warning: 2, Error: 3, Critical: 4 }; var s = (d.extensionConfig || {}).ApplicationInsightsAnalytics || {}; if (!0 !== d[I] && !0 !== s[I]) { var c = "onerror"; t(["_" + c]); var u = T[c]; T[c] = function (e, t, n, a, i) { var r = u && u(e, t, n, a, i); return !0 !== r && m["_" + c]({ message: e, url: t, lineNumber: n, columnNumber: a, error: i }), r }, d.autoExceptionInstrumented = !0 } return m }(y.cfg); function a() { y.onInit && y.onInit(n) } (T[t] = n).queue && 0 === n.queue.length ? (n.queue.push(a), n.trackPageView({})) : a() }(window, document, {
            src: "https://js.monitor.azure.com/scripts/b/ai.2.min.js",
            ld: -1,
            crossOrigin: "anonymous",
            cfg: {
                instrumentationKey: "",
                disableFetchTracking: false,
                enableCorsCorrelation: true,
                enableRequestHeaderTracking: true,
                enableResponseHeaderTracking: true
            }
        });
    </script>

Then add the SetInstrumentationKey line below into your program.cs file.

builder.Services.AddBlazorApplicationInsights(async applicationInsights =>
{
    var telemetryItem = new TelemetryItem()
    {
        Tags = new Dictionary<string, object>()
        {
            { "ai.cloud.role", "SPA" },
            { "ai.cloud.roleInstance", "Blazor Wasm" },
        }
    };

    // Added this line =>
    await applicationInsights.SetInstrumentationKey("AI KEY GOES HERE");    

    await applicationInsights.AddTelemetryInitializer(telemetryItem);
});

Launch app and check console.

[Ivan Josipovic]

Hey, I am no longer supporting the "SetInstrumentationKey" function due to limitations in AppInsights.JS uses and Blazor.

The supported approach is as follows, SetInstrumentationKey