apollo-server/packages/apollo-server-core/src/ApolloServer.ts
Evans Hauser 5412885cc0
apollo-server 2: uploads as schema enhancement fulfilled in registerServer (#1071)
* apollo-server-core: add file upload hooks and configuration

* apollo-server-core: make requestOptions and fileUploadsConfig public fields in ApolloServerBase

* apollo-server-express: initial fileuploads middleware

* apollo-server-hapi: initial file uploads middleware

* core: remove fileuploads from constructor and add merge capabilities

* express: add fileuploads to registerServer and single test

* hapi: add fileuploads schema merge to registerServer

* express: add check for EPIPE and ignore it due to upload server issue

* core: add scalar Upload to server construction
2018-05-29 15:58:52 -07:00

348 lines
11 KiB
TypeScript

import {
makeExecutableSchema,
addMockFunctionsToSchema,
IResolvers,
mergeSchemas,
} from 'graphql-tools';
import { Server as HttpServer } from 'http';
import {
execute,
GraphQLSchema,
subscribe,
ExecutionResult,
GraphQLError,
GraphQLResolveInfo,
ValidationContext,
FieldDefinitionNode,
} from 'graphql';
import { ApolloEngine } from 'apollo-engine';
import {
SubscriptionServer,
ExecutionParams,
} from 'subscriptions-transport-ws';
import { formatApolloErrors } from './errors';
import { GraphQLServerOptions as GraphQLOptions } from './graphqlOptions';
import { LogFunction, LogAction, LogStep } from './logging';
import {
Config,
ListenOptions,
MiddlewareOptions,
RegistrationOptions,
ServerInfo,
Context,
ContextFunction,
SubscriptionServerOptions,
} from './types';
const NoIntrospection = (context: ValidationContext) => ({
Field(node: FieldDefinitionNode) {
if (node.name.value === '__schema' || node.name.value === '__type') {
context.reportError(
new GraphQLError(
'GraphQL introspection is not allowed by Apollo Server, but the query contained __schema or __type. To enable introspection, pass introspection: true to ApolloServer in production',
[node],
),
);
}
},
});
export class ApolloServerBase<Request = RequestInit> {
public disableTools: boolean;
// set in the listen function if subscriptions are enabled
public subscriptionsPath: string;
public requestOptions: Partial<GraphQLOptions<any>>;
private schema: GraphQLSchema;
private context?: Context | ContextFunction;
private graphqlPath: string = '/graphql';
private engineProxy: ApolloEngine;
private engineEnabled: boolean = false;
private http?: HttpServer;
private subscriptionServer?: SubscriptionServer;
protected getHttp: () => HttpServer;
constructor(config: Config<Request>) {
const {
context,
resolvers,
schema,
schemaDirectives,
typeDefs,
introspection,
mocks,
...requestOptions
} = config;
//While reading process.env is slow, a server should only be constructed
//once per run, so we place the env check inside the constructor. If env
//should be used outside of the constructor context, place it as a private
//or protected field of the class instead of a global. Keeping the read in
//the contructor enables testing of different environments
const env = process.env.NODE_ENV;
const isDev = env !== 'production' && env !== 'test';
// if this is local dev, we want graphql gui and introspection to be turned on
// in production, you can manually turn these on by passing { introspection: true }
// to the constructor of ApolloServer
// we use this.disableTools to track this internally for later use when
// constructing middleware by frameworks
if (typeof introspection === 'boolean') this.disableTools = !introspection;
else this.disableTools = !isDev;
if (this.disableTools) {
const noIntro = [NoIntrospection];
requestOptions.validationRules = requestOptions.validationRules
? requestOptions.validationRules.concat(noIntro)
: noIntro;
}
this.requestOptions = requestOptions;
this.context = context;
const enhancedTypeDefs = Array.isArray(typeDefs) ? typeDefs : [typeDefs];
enhancedTypeDefs.push(`scalar Upload`);
this.schema = schema
? schema
: makeExecutableSchema({
typeDefs: enhancedTypeDefs.join('\n'),
schemaDirectives,
resolvers,
});
if (mocks) {
addMockFunctionsToSchema({
schema: this.schema,
preserveResolvers: true,
mocks: typeof mocks === 'boolean' ? {} : mocks,
});
}
}
public use({ getHttp, path }: RegistrationOptions) {
// we need to delay when we actually get the http server
// until we move into the listen function
this.getHttp = getHttp;
this.graphqlPath = path;
}
public enhanceSchema(
schema: GraphQLSchema | { typeDefs: string; resolvers: IResolvers },
) {
this.schema = mergeSchemas({
schemas: [
this.schema,
'typeDefs' in schema ? schema['typeDefs'] : schema,
],
resolvers: 'resolvers' in schema ? [, schema['resolvers']] : {},
});
}
public listen(opts: ListenOptions = {}): Promise<ServerInfo> {
this.http = this.getHttp();
const options = {
...opts,
http: {
port: process.env.PORT || 4000,
...opts.http,
},
};
if (opts.subscriptions !== false) {
let config: SubscriptionServerOptions;
if (
opts.subscriptions === true ||
typeof opts.subscriptions === 'undefined'
) {
config = {
path: this.graphqlPath,
};
} else if (typeof opts.subscriptions === 'string') {
config = { path: opts.subscriptions };
} else {
config = { path: this.graphqlPath, ...opts.subscriptions };
}
this.subscriptionsPath = config.path;
this.subscriptionServer = this.createSubscriptionServer(
this.http,
config,
);
}
if (opts.engineProxy || opts.engineInRequestPath) this.createEngine(opts);
return new Promise((resolve, reject) => {
if (this.engineProxy) {
this.engineProxy.listen(
{
graphqlPaths: [this.graphqlPath],
port: options.http.port,
httpServer: this.http,
launcherOptions: options.engineLauncherOptions,
},
() => {
this.engineProxy.engineListeningAddress.url = require('url').resolve(
this.engineProxy.engineListeningAddress.url,
this.graphqlPath,
);
resolve(this.engineProxy.engineListeningAddress);
},
);
this.engineProxy.on('error', reject);
return;
}
// all options for http listeners
// https://nodejs.org/api/net.html#net_server_listen_options_callback
// https://github.com/apollographql/apollo-server/pull/979/files/33ea0c92a1e4e76c8915ff08806f15dae391e1f0#discussion_r184470435
// https://github.com/apollographql/apollo-server/pull/979#discussion_r184471445
function listenCallback() {
const listeningAddress: any = this.http.address();
// Convert IPs which mean "any address" (IPv4 or IPv6) into localhost
// corresponding loopback ip. Note that the url field we're setting is
// primarily for consumption by our test suite. If this heuristic is
// wrong for your use case, explicitly specify a frontend host (in the
// `frontends.host` field in your engine config, or in the `host`
// option to ApolloServer.listen).
let hostForUrl = listeningAddress.address;
if (
listeningAddress.address === '' ||
listeningAddress.address === '::'
)
hostForUrl = 'localhost';
listeningAddress.url = require('url').format({
protocol: 'http',
hostname: hostForUrl,
port: listeningAddress.port,
pathname: this.graphqlPath,
});
resolve(listeningAddress);
}
if (options.http.handle) {
this.http.listen(
options.http.handle,
options.http.backlog,
listenCallback.bind(this),
);
} else {
this.http.listen(options.http, listenCallback.bind(this));
}
});
}
public async stop() {
if (this.engineProxy) await this.engineProxy.stop();
if (this.subscriptionServer) await this.subscriptionServer.close();
if (this.http) await new Promise(s => this.http.close(s));
}
private createSubscriptionServer(
server: HttpServer,
config: SubscriptionServerOptions,
) {
const { onDisconnect, onConnect, keepAlive, path } = config;
return SubscriptionServer.create(
{
schema: this.schema,
execute,
subscribe,
onConnect: onConnect
? onConnect
: (connectionParams: Object) => ({ ...connectionParams }),
onDisconnect: onDisconnect,
onOperation: async (_: string, connection: ExecutionParams) => {
connection.formatResponse = (value: ExecutionResult) => ({
...value,
errors:
value.errors &&
formatApolloErrors([...value.errors], {
formatter: this.requestOptions.formatError,
debug: this.requestOptions.debug,
logFunction: this.requestOptions.logFunction,
}),
});
let context: Context = this.context ? this.context : { connection };
try {
context =
typeof this.context === 'function'
? await this.context({ connection })
: context;
} catch (e) {
throw formatApolloErrors([e], {
formatter: this.requestOptions.formatError,
debug: this.requestOptions.debug,
logFunction: this.requestOptions.logFunction,
})[0];
}
return { ...connection, context };
},
keepAlive,
},
{
server,
path,
},
);
}
private createEngine({ engineInRequestPath, engineProxy }: ListenOptions) {
// only access this onces as its slower on node
const { ENGINE_API_KEY, ENGINE_CONFIG } = process.env;
if (engineProxy === false && (ENGINE_API_KEY || ENGINE_CONFIG)) {
console.warn(
'engine is set to false when creating ApolloServer but either ENGINE_CONFIG or ENGINE_API_KEY was found in the environment',
);
}
let ApolloEngine;
if (engineProxy) {
// detect engine if it is set to true or has a config, and possibly load it
try {
ApolloEngine = require('apollo-engine').ApolloEngine;
} catch (e) {
console.warn(`ApolloServer was unable to load Apollo Engine yet engine was configured in the options when creating this ApolloServer? To fix this, run the following command:
npm install apollo-engine --save
`);
}
this.engineProxy = new ApolloEngine(
typeof engineProxy === 'boolean' ? undefined : engineProxy,
);
}
// XXX should this allow for header overrides from graphql-playground?
if (this.engineProxy || engineInRequestPath) this.engineEnabled = true;
}
request(request: Request) {
let context: Context = this.context ? this.context : { request };
//Defer context resolution to inside of runQuery
context =
typeof this.context === 'function'
? () => this.context({ req: request })
: context;
return {
schema: this.schema,
tracing: this.engineEnabled,
cacheControl: this.engineEnabled,
context,
// allow overrides from options
...this.requestOptions,
};
}
}