[POC] Proxy Configuration Extension

Author: RandomByte

lib/projectPreprocessor.js

@@ -136,7 +136,7 @@ class ProjectPreprocessor {
 
 			if (project.kind === "extension") {
 				// Not a project but an extension
-				// => remove it as from any known projects that depend on it
+				// => remove it from any known projects that depend on it
 				const parents = this.processedProjects[project.id].parents;
 				for (let i = parents.length - 1; i >= 0; i--) {
 					parents[i].dependencies.splice(parents[i].dependencies.indexOf(project), 1);
@@ -272,7 +272,7 @@ class ProjectPreprocessor {
 			return false; // ignore this project
 		}
 
-		if (project.specVersion !== "0.1" && project.specVersion !== "1.0") {
+		if (project.specVersion !== "0.1" && project.specVersion !== "1.0" && project.specVersion !== "1.1a") {
 			throw new Error(
 				`Unsupported specification version ${project.specVersion} defined for project ` +
 				`${project.id}. ` +
@@ -330,7 +330,8 @@ class ProjectPreprocessor {
 
 		if (!extension.specVersion) {
 			throw new Error(`No specification version defined for extension ${extension.metadata.name}`);
-		} else if (extension.specVersion !== "0.1" && extension.specVersion !== "1.0") {
+		} else if (extension.specVersion !== "0.1" && extension.specVersion !== "1.0" &&
+				extension.specVersion !== "1.1a") {
 			throw new Error(
 				`Unsupported specification version ${extension.specVersion} defined for extension ` +
 				`${extension.metadata.name}. ` +
@@ -354,6 +355,13 @@ class ProjectPreprocessor {
 		case "server-middleware":
 			this.handleServerMiddleware(extension);
 			break;
+		case "proxy-configuration":
+			if (extension.specVersion !== "1.1a") {
+				throw new Error(`Extensions of type "proxy-configuration"
+					must use specification version "1.1a"`);
+			}
+			this.handleProxyConfiguration(extension);
+			break;
 		default:
 			throw new Error(`Unknown extension type '${extension.type}' for ${extension.id}`);
 		}
@@ -514,6 +522,17 @@ class ProjectPreprocessor {
 		const middlewarePath = path.join(extension.path, extension.middleware.path);
 		middlewareRepository.addMiddleware(extension.metadata.name, middlewarePath);
 	}
+
+	handleProxyConfiguration(extension) {
+		if (!extension.metadata && !extension.metadata.name) {
+			throw new Error(`Proxy configuration extension ${extension.id} is missing 'metadata.name' configuration`);
+		}
+		if (!extension.proxy || !extension.proxy.configuration) {
+			throw new Error(`Proxy configuration extension ${extension.id} is missing 'proxy' configuration`);
+		}
+		const {proxyConfiguration} = require("@ui5/server");
+		proxyConfiguration.addConfiguration(extension.metadata.name, extension.proxy.configuration);
+	}
 }
 
 /**