public static IHtmlContent GetHtmlInjection(Uri[] probingUris, string seed)
{
var apiCacheBuster = $"{Process.GetCurrentProcess().Id}.{seed}";
var template =
$@"
<div>
<div id='dotnet-interactive-this-cell-$CACHE_BUSTER$' style='display: none'>
The below script needs to be able to find the current output cell; this is an easy method to get it.
</div>
<script type='text/javascript'>
async function probeAddresses(probingAddresses) {{
function timeout(ms, promise) {{
return new Promise(function (resolve, reject) {{
setTimeout(function () {{
reject(new Error('timeout'))
}}, ms)
promise.then(resolve, reject)
}})
}}
if (Array.isArray(probingAddresses)) {{
for (let i = 0; i < probingAddresses.length; i++) {{
let rootUrl = probingAddresses[i];
if (!rootUrl.endsWith('/')) {{
rootUrl = `${{rootUrl}}/`;
}}
try {{
let response = await timeout(1000, fetch(`${{rootUrl}}discovery`, {{
method: 'POST',
cache: 'no-cache',
mode: 'cors',
timeout: 1000,
headers: {{
'Content-Type': 'text/plain'
}},
body: probingAddresses[i]
}}));
if (response.status == 200) {{
return rootUrl;
}}
}}
catch (e) {{ }}
}}
}}
}}
function loadDotnetInteractiveApi() {{
probeAddresses($ADDRESSES$)
.then((root) => {{
// use probing to find host url and api resources
// load interactive helpers and language services
let dotnetInteractiveRequire = require.config({{
context: '$CACHE_BUSTER$',
paths:
{{
'dotnet-interactive': `${{root}}resources`
}}
}}) || require;
window.dotnetInteractiveRequire = dotnetInteractiveRequire;
window.configureRequireFromExtension = function(extensionName, extensionCacheBuster) {{
let paths = {{}};
paths[extensionName] = `${{root}}extensions/${{extensionName}}/resources/`;
let internalRequire = require.config({{
context: extensionCacheBuster,
paths: paths,
urlArgs: `cacheBuster=${{extensionCacheBuster}}`
}}) || require;
return internalRequire
}};
dotnetInteractiveRequire([
'dotnet-interactive/dotnet-interactive'
],
function (dotnet) {{
dotnet.init(window);
}},
function (error) {{
console.log(error);
}}
);
}})
.catch(error => {{console.log(error);}});
}}
{JavascriptUtilities.GetCodeForEnsureRequireJs(onRequirejsLoadedCallBackName: "loadDotnetInteractiveApi")}
</script>
</div>";
var jsProbingUris = $"[{ string.Join(", ", probingUris.Select(a => $"\"{a.AbsoluteUri}\"")) }]";
var html = template
.Replace("$ADDRESSES$", jsProbingUris)
.Replace("$CACHE_BUSTER$", apiCacheBuster);
return(new HtmlString(html));
}
private string GenerateBootstrapperCode(Uri externalUri, string frontendType, string hash)
{
string template = $@"
// ensure `require` is available globally
(function (global) {{
if (!global) {{
global = window;
}}
let bootstrapper_$FRONTENDTYPE$_$HASH$ = function () {{
let loadDotnetInteractiveApi = function () {{
// use probing to find host url and api resources
// load interactive helpers and language services
let dotnetInteractiveRequire = require.config({{
context: '$HASH$',
paths: {{
'dotnet-interactive': '$EXTERNALURI$resources'
}},
urlArgs: 'cacheBuster=$HASH$'
}}) || require;
global.dotnetInteractiveRequire = dotnetInteractiveRequire;
global.configureRequireFromExtension = function (extensionName, extensionCacheBuster) {{
let paths = {{}};
paths[extensionName] = `$EXTERNALURI$extensions/${{extensionName}}/resources/`;
let internalRequire = require.config({{
context: extensionCacheBuster,
paths: paths,
urlArgs: `cacheBuster=${{extensionCacheBuster}}`
}}) || require;
return internalRequire
}};
dotnetInteractiveRequire([
'dotnet-interactive/dotnet-interactive'
],
function (dotnet) {{
dotnet.init(global);
console.log('dotnet-interactive js api initialised');
}},
function (error) {{
console.log(error);
}}
);
console.log('execution of boostrapper function bootstrapper_$FRONTENDTYPE$_$HASH$ completed');
}}
{JavascriptUtilities.GetCodeForEnsureRequireJs(new Uri("https://cdnjs.cloudflare.com/ajax/libs/require.js/2.3.6/require.min.js"), "loadDotnetInteractiveApi")}
}};
console.log('installed boostrapper function bootstrapper_$FRONTENDTYPE$_$HASH$');
bootstrapper_$FRONTENDTYPE$_$HASH$();
}})(window);
";
return(template
.Replace("$HASH$", hash)
.Replace("$EXTERNALURI$", externalUri.AbsoluteUri)
.Replace("$FRONTENDTYPE$", frontendType));
}