@typespec/http-server-js/dist/src/http/index.js

TypeSpec HTTP server code generator for JavaScript

// Copyright (c) Microsoft Corporation
// Licensed under the MIT license.
import { NoTarget } from "@typespec/compiler";
import { getHttpService, getServers } from "@typespec/http";
import { createModule } from "../ctx.js";
import { reportDiagnostic } from "../lib.js";
import { getOpenApi3Emitter, getOpenApi3ServiceRecord, tryGetOpenApi3 } from "../util/openapi3.js";
import { emitRawServer } from "./server/index.js";
import { emitRouter } from "./server/router.js";
/**
 * Emits bindings for the service to be carried over the HTTP protocol.
 */
export async function emitHttp(ctx) {
    const [httpService, diagnostics] = getHttpService(ctx.program, ctx.service.type);
    const diagnosticsAreError = diagnostics.some((d) => d.severity === "error");
    if (diagnosticsAreError) {
        reportDiagnostic(ctx.program, {
            code: "http-emit-disabled",
            target: NoTarget,
            messageId: "default",
        });
        return;
    }
    const servers = getServers(ctx.program, ctx.service.type) ?? [];
    const httpModule = createModule("http", ctx.generatedModule);
    const httpContext = {
        ...ctx,
        httpService,
        httpModule,
        servers,
    };
    const openapi3Emitter = await getOpenApi3Emitter();
    const openapi3 = await tryGetOpenApi3(ctx.program, ctx.service);
    if (openapi3) {
        const openApiDocumentModule = createModule("openapi3", httpModule);
        openApiDocumentModule.declarations.push([
            `export const openApiDocument = ${JSON.stringify(openapi3)}`,
        ]);
    }
    else if (openapi3Emitter) {
        const serviceRecord = await getOpenApi3ServiceRecord(ctx.program, ctx.service);
        reportDiagnostic(ctx.program, {
            code: "openapi3-document-not-generated",
            target: ctx.service.type,
            messageId: serviceRecord?.versioned ? "versioned" : "unable",
        });
    }
    const operationsModule = createModule("operations", httpModule);
    const serverRawModule = emitRawServer(httpContext, operationsModule);
    emitRouter(httpContext, httpService, serverRawModule);
}
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