JavaScriptServices/src/Microsoft.AspNetCore.SpaServices/Content/Node/prerenderer.js

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/* 0 */
/***/ function(module, exports, __webpack_require__) {

	module.exports = __webpack_require__(1);


/***/ },
/* 1 */
/***/ function(module, exports, __webpack_require__) {

	"use strict";
	var path = __webpack_require__(2);
	// Separate declaration and export just to add type checking on function signature
	exports.renderToString = renderToStringImpl;
	// This function is invoked by .NET code (via NodeServices). Its job is to hand off execution to the application's
	// prerendering boot function. It can operate in two modes:
	// [1] Legacy mode
	//     This is for backward compatibility with projects created with templates older than the generator version 0.6.0.
	//     In this mode, we don't really do anything here - we just load the 'aspnet-prerendering' NPM module (which must
	//     exist in node_modules, and must be v1.x (not v2+)), and pass through all the parameters to it. Code in
	//     'aspnet-prerendering' v1.x will locate the boot function and invoke it.
	//     The drawback to this mode is that, for it to work, you have to deploy node_modules to production.
	// [2] Current mode
	//     This is for projects created with the Yeoman generator 0.6.0+ (or projects manually updated). In this mode,
	//     we don't invoke 'require' at runtime at all. All our dependencies are bundled into the NuGet package, so you
	//     don't have to deploy node_modules to production.
	// To determine whether we're in mode [1] or [2], the code locates your prerendering boot function, and checks whether
	// a certain flag is attached to the function instance.
	function renderToStringImpl(callback, applicationBasePath, bootModule, absoluteRequestUrl, requestPathAndQuery, customDataParameter, overrideTimeoutMilliseconds) {
	    try {
	        var forceLegacy = isLegacyAspNetPrerendering();
	        var renderToStringFunc = !forceLegacy && findRenderToStringFunc(applicationBasePath, bootModule);
	        var isNotLegacyMode = renderToStringFunc && renderToStringFunc['isServerRenderer'];
	        if (isNotLegacyMode) {
	            // Current (non-legacy) mode - we invoke the exported function directly (instead of going through aspnet-prerendering)
	            // It's type-safe to just apply the incoming args to this function, because we already type-checked that it's a RenderToStringFunc,
	            // just like renderToStringImpl itself is.
	            renderToStringFunc.apply(null, arguments);
	        }
	        else {
	            // Legacy mode - just hand off execution to 'aspnet-prerendering' v1.x, which must exist in node_modules at runtime
	            var aspNetPrerenderingV1RenderToString = __webpack_require__(3).renderToString;
	            if (aspNetPrerenderingV1RenderToString) {
	                aspNetPrerenderingV1RenderToString(callback, applicationBasePath, bootModule, absoluteRequestUrl, requestPathAndQuery, customDataParameter, overrideTimeoutMilliseconds);
	            }
	            else {
	                callback('If you use aspnet-prerendering >= 2.0.0, you must update your server-side boot module to call createServerRenderer. '
	                    + 'Either update your boot module code, or revert to aspnet-prerendering version 1.x');
	            }
	        }
	    }
	    catch (ex) {
	        // Make sure loading errors are reported back to the .NET part of the app
	        callback('Prerendering failed because of error: '
	            + ex.stack
	            + '\nCurrent directory is: '
	            + process.cwd());
	    }
	}
	;
	function findBootModule(applicationBasePath, bootModule) {
	    var bootModuleNameFullPath = path.resolve(applicationBasePath, bootModule.moduleName);
	    if (bootModule.webpackConfig) {
	        // If you're using asp-prerender-webpack-config, you're definitely in legacy mode
	        return null;
	    }
	    else {
	        return require(bootModuleNameFullPath);
	    }
	}
	function findRenderToStringFunc(applicationBasePath, bootModule) {
	    // First try to load the module
	    var foundBootModule = findBootModule(applicationBasePath, bootModule);
	    if (foundBootModule === null) {
	        return null; // Must be legacy mode
	    }
	    // Now try to pick out the function they want us to invoke
	    var renderToStringFunc;
	    if (bootModule.exportName) {
	        // Explicitly-named export
	        renderToStringFunc = foundBootModule[bootModule.exportName];
	    }
	    else if (typeof foundBootModule !== 'function') {
	        // TypeScript-style default export
	        renderToStringFunc = foundBootModule.default;
	    }
	    else {
	        // Native default export
	        renderToStringFunc = foundBootModule;
	    }
	    // Validate the result
	    if (typeof renderToStringFunc !== 'function') {
	        if (bootModule.exportName) {
	            throw new Error("The module at " + bootModule.moduleName + " has no function export named " + bootModule.exportName + ".");
	        }
	        else {
	            throw new Error("The module at " + bootModule.moduleName + " does not export a default function, and you have not specified which export to invoke.");
	        }
	    }
	    return renderToStringFunc;
	}
	function isLegacyAspNetPrerendering() {
	    var version = getAspNetPrerenderingPackageVersion();
	    return version && /^1\./.test(version);
	}
	function getAspNetPrerenderingPackageVersion() {
	    try {
	        var packageEntryPoint = require.resolve('aspnet-prerendering');
	        var packageDir = path.dirname(packageEntryPoint);
	        var packageJsonPath = path.join(packageDir, 'package.json');
	        var packageJson = require(packageJsonPath);
	        return packageJson.version.toString();
	    }
	    catch (ex) {
	        // Implies aspnet-prerendering isn't in node_modules at all (or node_modules itself doesn't exist,
	        // which will be the case in production based on latest templates).
	        return null;
	    }
	}


/***/ },
/* 2 */
/***/ function(module, exports) {

	module.exports = require("path");

/***/ },
/* 3 */
/***/ function(module, exports) {

	module.exports = require("aspnet-prerendering");

/***/ }
/******/ ])));