@nestjs/core
Version:
Nest - modern, fast, powerful node.js web framework (@core)
147 lines (146 loc) • 7.67 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
const shared_utils_1 = require("@nestjs/common/utils/shared.utils");
const invalid_middleware_exception_1 = require("../errors/exceptions/invalid-middleware.exception");
const runtime_exception_1 = require("../errors/exceptions/runtime.exception");
const context_id_factory_1 = require("../helpers/context-id-factory");
const execution_context_host_1 = require("../helpers/execution-context-host");
const request_constants_1 = require("../router/request/request-constants");
const router_exception_filters_1 = require("../router/router-exception-filters");
const router_proxy_1 = require("../router/router-proxy");
const constants_1 = require("./../injector/constants");
const builder_1 = require("./builder");
const resolver_1 = require("./resolver");
const routes_mapper_1 = require("./routes-mapper");
class MiddlewareModule {
constructor() {
this.routerProxy = new router_proxy_1.RouterProxy();
this.exceptionFiltersCache = new WeakMap();
}
async register(middlewareContainer, container, config, injector) {
const appRef = container.getHttpAdapterRef();
this.routerExceptionFilter = new router_exception_filters_1.RouterExceptionFilters(container, config, appRef);
this.routesMapper = new routes_mapper_1.RoutesMapper(container);
this.resolver = new resolver_1.MiddlewareResolver(middlewareContainer);
this.config = config;
this.injector = injector;
this.container = container;
const modules = container.getModules();
await this.resolveMiddleware(middlewareContainer, modules);
}
async resolveMiddleware(middlewareContainer, modules) {
const moduleEntries = [...modules.entries()];
await Promise.all(moduleEntries.map(async ([name, module]) => {
const instance = module.instance;
await this.loadConfiguration(middlewareContainer, instance, name);
await this.resolver.resolveInstances(module, name);
}));
}
async loadConfiguration(middlewareContainer, instance, moduleKey) {
if (!instance.configure) {
return;
}
const middlewareBuilder = new builder_1.MiddlewareBuilder(this.routesMapper);
await instance.configure(middlewareBuilder);
if (!(middlewareBuilder instanceof builder_1.MiddlewareBuilder)) {
return;
}
const config = middlewareBuilder.build();
middlewareContainer.insertConfig(config, moduleKey);
}
async registerMiddleware(middlewareContainer, applicationRef) {
const configs = middlewareContainer.getConfigurations();
const registerAllConfigs = (module, middlewareConfig) => middlewareConfig.map(async (config) => {
await this.registerMiddlewareConfig(middlewareContainer, config, module, applicationRef);
});
const entriesSortedByDistance = [...configs.entries()].sort(([moduleA], [moduleB]) => {
return (this.container.getModuleByKey(moduleB).distance -
this.container.getModuleByKey(moduleA).distance);
});
const registerModuleConfigs = async ([module, moduleConfigs]) => {
await Promise.all(registerAllConfigs(module, [...moduleConfigs]));
};
await Promise.all(entriesSortedByDistance.map(registerModuleConfigs));
}
async registerMiddlewareConfig(middlewareContainer, config, module, applicationRef) {
const { forRoutes } = config;
const registerRouteMiddleware = async (routeInfo) => {
await this.registerRouteMiddleware(middlewareContainer, routeInfo, config, module, applicationRef);
};
await Promise.all(forRoutes.map(registerRouteMiddleware));
}
async registerRouteMiddleware(middlewareContainer, routeInfo, config, moduleKey, applicationRef) {
const middlewareCollection = [].concat(config.middleware);
const module = this.container.getModuleByKey(moduleKey);
await Promise.all(middlewareCollection.map(async (metatype) => {
const collection = middlewareContainer.getMiddlewareCollection(moduleKey);
const instanceWrapper = collection.get(metatype.name);
if (shared_utils_1.isUndefined(instanceWrapper)) {
throw new runtime_exception_1.RuntimeException();
}
await this.bindHandler(instanceWrapper, applicationRef, routeInfo.method, routeInfo.path, module, collection);
}));
}
async bindHandler(wrapper, applicationRef, method, path, module, collection) {
const { instance, metatype } = wrapper;
if (shared_utils_1.isUndefined(instance.use)) {
throw new invalid_middleware_exception_1.InvalidMiddlewareException(metatype.name);
}
const router = applicationRef.createMiddlewareFactory(method);
const isStatic = wrapper.isDependencyTreeStatic();
if (isStatic) {
const proxy = await this.createProxy(instance);
return this.registerHandler(router, path, proxy);
}
this.registerHandler(router, path, async (req, res, next) => {
try {
const contextId = req[request_constants_1.REQUEST_CONTEXT_ID] || context_id_factory_1.createContextId();
if (!req[request_constants_1.REQUEST_CONTEXT_ID]) {
Object.defineProperty(req, request_constants_1.REQUEST_CONTEXT_ID, {
value: contextId,
enumerable: false,
writable: false,
configurable: false,
});
this.registerRequestProvider(req, contextId);
}
const contextInstance = await this.injector.loadPerContext(instance, module, collection, contextId);
const proxy = await this.createProxy(contextInstance, contextId);
return proxy(req, res, next);
}
catch (err) {
let exceptionsHandler = this.exceptionFiltersCache.get(instance.use);
if (!exceptionsHandler) {
exceptionsHandler = this.routerExceptionFilter.create(instance, instance.use, undefined);
this.exceptionFiltersCache.set(instance.use, exceptionsHandler);
}
const host = new execution_context_host_1.ExecutionContextHost([req, res, next]);
exceptionsHandler.next(err, host);
}
});
}
async createProxy(instance, contextId = constants_1.STATIC_CONTEXT) {
const exceptionsHandler = this.routerExceptionFilter.create(instance, instance.use, undefined, contextId);
const middleware = instance.use.bind(instance);
return this.routerProxy.createProxy(middleware, exceptionsHandler);
}
registerHandler(router, path, proxy) {
const prefix = this.config.getGlobalPrefix();
const basePath = shared_utils_1.validatePath(prefix);
if (basePath && path === '/*') {
// strip slash when a wildcard is being used
// and global prefix has been set
path = '*';
}
router(basePath + path, proxy);
}
registerRequestProvider(request, contextId) {
const coreModuleRef = this.container.getInternalCoreModuleRef();
const wrapper = coreModuleRef.getProviderByKey(request_constants_1.REQUEST);
wrapper.setInstanceByContextId(contextId, {
instance: request,
isResolved: true,
});
}
}
exports.MiddlewareModule = MiddlewareModule;