| 1 | {"version":3,"file":"middleware.js","names":["expressBuiltinMiddleware","urlencoded","text","json","raw","printConfigWarnings","warnings","functionObj","length","warning","reporter","warn","property","originalRelativeFilePath","expectedType","JSON","stringify","original","replacedWith","createSetContextFunctionMiddleware","getFunctions","prepareFn","showDebugMessageInResponse","executeFunction","req","res","next","functions","pathFragment","params","find","functionRoute","some","f","matchPath","matchResult","reachMatch","userConfig","pathToFunction","absoluteCompiledFilePath","fnToExecute","require","cache","resolve","fn","config","default","e","message","includes","originalAbsoluteFilePath","undefined","error","headersSent","status","send","sendStatus","createConfig","context","setCookies","_res","cookies","headers","cookie","parse","bodyParserMiddlewareWithConfig","type","bodyParser","bodyParserConfig","verbose","start","Date","now","Promise","end","log","functionMiddlewares","middlewareConfig","setContext","multer","any"],"sources":["../../../src/internal-plugins/functions/middleware.ts"],"sourcesContent":["import { match as reachMatch } from \"@gatsbyjs/reach-router\"\nimport cookie from \"cookie\"\nimport { urlencoded, text, json, raw } from \"express\"\nimport type { RequestHandler, Request, Response, NextFunction } from \"express\"\nimport reporter from \"gatsby-cli/lib/reporter\"\nimport multer from \"multer\"\n\nimport {\n createConfig,\n IGatsbyFunctionConfigProcessed,\n IGatsbyBodyParserConfigProcessed,\n IAPIFunctionWarning,\n} from \"./config\"\nimport type { IGatsbyFunction } from \"../../redux/types\"\n\nconst expressBuiltinMiddleware = {\n urlencoded,\n text,\n json,\n raw,\n}\n\ninterface IGatsbyRequestContext {\n functionObj: IGatsbyFunction\n fnToExecute: (req: Request, res: Response) => void | Promise<void>\n // we massage params early in setContext middleware, but apparently other middlewares\n // reset it, so we will store those on our context and restore later\n params: Request[\"params\"]\n config: IGatsbyFunctionConfigProcessed\n showDebugMessageInResponse: boolean\n}\n\ninterface IGatsbyInternalRequest extends Request {\n context?: IGatsbyRequestContext\n}\n\ntype IGatsbyMiddleware = (\n req: IGatsbyInternalRequest,\n res: Response,\n next: NextFunction\n) => Promise<void> | void\n\ninterface ICreateMiddlewareConfig {\n getFunctions: () => Array<IGatsbyFunction>\n prepareFn?: (functionObj: IGatsbyFunction) => Promise<void> | void\n showDebugMessageInResponse?: boolean\n}\n\nexport function printConfigWarnings(\n warnings: Array<IAPIFunctionWarning>,\n functionObj: IGatsbyFunction\n): void {\n if (warnings.length) {\n for (const warning of warnings) {\n reporter.warn(\n `${\n warning.property\n ? `\\`${warning.property}\\` property of exported config`\n : `Exported config`\n } in \\`${\n functionObj.originalRelativeFilePath\n }\\` is misconfigured.\\nExpected object:\\n\\n${\n warning.expectedType\n }\\n\\nGot:\\n\\n${JSON.stringify(\n warning.original\n )}\\n\\nUsing default:\\n\\n${JSON.stringify(\n warning.replacedWith,\n null,\n 2\n )}`\n )\n }\n }\n}\n\nfunction createSetContextFunctionMiddleware({\n getFunctions,\n prepareFn,\n showDebugMessageInResponse,\n}: ICreateMiddlewareConfig): IGatsbyMiddleware {\n return async function executeFunction(\n req: IGatsbyInternalRequest,\n res: Response,\n next: NextFunction\n ): Promise<void> {\n const functions = getFunctions()\n const { \"0\": pathFragment } = req.params\n\n // Check first for exact matches.\n let functionObj = functions.find(\n ({ functionRoute }) => functionRoute === pathFragment\n )\n\n if (!functionObj) {\n // Check if there's any matchPaths that match.\n // We loop until we find the first match.\n functions.some(f => {\n if (f.matchPath) {\n const matchResult = reachMatch(f.matchPath, pathFragment)\n if (matchResult) {\n req.params = matchResult.params\n if (req.params[`*`]) {\n // Backwards compatability for v3\n // TODO remove in v5\n req.params[`0`] = req.params[`*`]\n }\n functionObj = f\n\n return true\n }\n }\n\n return false\n })\n }\n\n if (functionObj) {\n let userConfig\n if (prepareFn) {\n await prepareFn(functionObj)\n }\n\n const pathToFunction = functionObj.absoluteCompiledFilePath\n let fnToExecute\n try {\n delete require.cache[require.resolve(pathToFunction)]\n const fn = require(pathToFunction)\n userConfig = fn?.config\n\n fnToExecute = (fn && fn.default) || fn\n } catch (e) {\n if (e?.message?.includes(`fnToExecute is not a function`)) {\n e.message = `${functionObj.originalAbsoluteFilePath} does not export a function.`\n }\n\n fnToExecute = undefined\n reporter.error(e)\n if (!res.headersSent) {\n if (showDebugMessageInResponse) {\n res\n .status(500)\n .send(\n `Error when executing function \"${functionObj.originalAbsoluteFilePath}\":<br /><br />${e.message}`\n )\n } else {\n res.sendStatus(500)\n }\n }\n return\n }\n\n if (fnToExecute) {\n const { config, warnings } = createConfig(userConfig)\n\n printConfigWarnings(warnings, functionObj)\n\n req.context = {\n functionObj,\n fnToExecute,\n params: req.params,\n config,\n showDebugMessageInResponse: showDebugMessageInResponse ?? false,\n }\n }\n }\n\n next()\n }\n}\n\nfunction setCookies(\n req: IGatsbyInternalRequest,\n _res: Response,\n next: NextFunction\n): void {\n const cookies = req.headers.cookie\n\n if (!cookies) {\n return next()\n }\n\n req.cookies = cookie.parse(cookies)\n\n return next()\n}\n\nfunction bodyParserMiddlewareWithConfig(\n type: keyof IGatsbyBodyParserConfigProcessed\n): IGatsbyMiddleware {\n return function (\n req: IGatsbyInternalRequest,\n res: Response,\n next: NextFunction\n ): void {\n if (req.context && req.context.config.bodyParser) {\n const bodyParserConfig = req.context.config.bodyParser[type]\n expressBuiltinMiddleware[type](bodyParserConfig)(req, res, next)\n } else {\n next()\n }\n }\n}\n\nasync function executeFunction(\n req: IGatsbyInternalRequest,\n res: Response,\n next: NextFunction\n): Promise<void> {\n if (req.context) {\n reporter.verbose(`Running ${req.context.functionObj.functionRoute}`)\n req.params = req.context.params\n const start = Date.now()\n const context = req.context\n // we don't want to leak internal context to actual request handler\n delete req.context\n try {\n await Promise.resolve(context.fnToExecute(req, res))\n } catch (e) {\n if (e?.message?.includes(`fnToExecute is not a function`)) {\n e.message = `${context.functionObj.originalAbsoluteFilePath} does not export a function.`\n }\n\n reporter.error(e)\n // Don't send the error if that would cause another error.\n if (!res.headersSent) {\n if (context.showDebugMessageInResponse) {\n res\n .status(500)\n .send(\n `Error when executing function \"${context.functionObj.originalAbsoluteFilePath}\":<br /><br />${e.message}`\n )\n } else {\n res.sendStatus(500)\n }\n }\n }\n\n const end = Date.now()\n reporter.log(\n `Executed function \"/api/${context.functionObj.functionRoute}\" in ${\n end - start\n }ms`\n )\n } else {\n next()\n }\n}\n\nexport function functionMiddlewares(\n middlewareConfig: ICreateMiddlewareConfig\n): Array<RequestHandler> {\n const setContext = createSetContextFunctionMiddleware(middlewareConfig)\n\n return [\n setCookies,\n setContext,\n multer().any(),\n bodyParserMiddlewareWithConfig(`raw`),\n bodyParserMiddlewareWithConfig(`text`),\n bodyParserMiddlewareWithConfig(`urlencoded`),\n bodyParserMiddlewareWithConfig(`json`),\n executeFunction,\n 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