@apollo/gateway
Version:
57 lines • 2.42 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.loadServicesFromRemoteEndpoint = void 0;
const graphql_1 = require("graphql");
const node_fetch_1 = require("node-fetch");
const types_1 = require("../../datasources/types");
const __1 = require("../..");
async function loadServicesFromRemoteEndpoint({ serviceList, getServiceIntrospectionHeaders, serviceSdlCache, }) {
if (!serviceList || !serviceList.length) {
throw new Error('Tried to load services from remote endpoints but none provided');
}
let isNewSchema = false;
const promiseOfServiceList = serviceList.map(async ({ name, url, dataSource }) => {
if (!url) {
throw new Error(`Tried to load schema for '${name}' but no 'url' was specified.`);
}
const request = {
query: __1.SERVICE_DEFINITION_QUERY,
http: {
url,
method: 'POST',
headers: new node_fetch_1.Headers(await getServiceIntrospectionHeaders({ name, url })),
},
};
return dataSource
.process({
kind: types_1.GraphQLDataSourceRequestKind.LOADING_SCHEMA,
request,
context: {},
})
.then(({ data, errors }) => {
if (data && !errors) {
const typeDefs = data._service.sdl;
const previousDefinition = serviceSdlCache.get(name);
if (previousDefinition !== typeDefs) {
isNewSchema = true;
}
serviceSdlCache.set(name, typeDefs);
return {
name,
url,
typeDefs: (0, graphql_1.parse)(typeDefs),
};
}
throw new Error(errors === null || errors === void 0 ? void 0 : errors.map((e) => e.message).join('\n'));
})
.catch((err) => {
const errorMessage = `Couldn't load service definitions for "${name}" at ${url}` +
(err && err.message ? ': ' + err.message || err : '');
throw new Error(errorMessage);
});
});
const serviceDefinitions = await Promise.all(promiseOfServiceList);
return { serviceDefinitions, isNewSchema };
}
exports.loadServicesFromRemoteEndpoint = loadServicesFromRemoteEndpoint;
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