(proxy, appPublicFolder, servedPathname)
| 300 | } |
| 301 | |
| 302 | function prepareProxy(proxy, appPublicFolder, servedPathname) { |
| 303 | // `proxy` lets you specify alternate servers for specific requests. |
| 304 | if (!proxy) { |
| 305 | return undefined; |
| 306 | } |
| 307 | if (typeof proxy !== 'string') { |
| 308 | console.log( |
| 309 | chalk.red('When specified, "proxy" in package.json must be a string.') |
| 310 | ); |
| 311 | console.log( |
| 312 | chalk.red('Instead, the type of "proxy" was "' + typeof proxy + '".') |
| 313 | ); |
| 314 | console.log( |
| 315 | chalk.red('Either remove "proxy" from package.json, or make it a string.') |
| 316 | ); |
| 317 | process.exit(1); |
| 318 | } |
| 319 | |
| 320 | // If proxy is specified, let it handle any request except for |
| 321 | // files in the public folder and requests to the WebpackDevServer socket endpoint. |
| 322 | // https://github.com/facebook/create-react-app/issues/6720 |
| 323 | const sockPath = process.env.WDS_SOCKET_PATH || '/ws'; |
| 324 | const isDefaultSockHost = !process.env.WDS_SOCKET_HOST; |
| 325 | function mayProxy(pathname) { |
| 326 | const maybePublicPath = path.resolve( |
| 327 | appPublicFolder, |
| 328 | pathname.replace(new RegExp('^' + servedPathname), '') |
| 329 | ); |
| 330 | const isPublicFileRequest = fs.existsSync(maybePublicPath); |
| 331 | // used by webpackHotDevClient |
| 332 | const isWdsEndpointRequest = |
| 333 | isDefaultSockHost && pathname.startsWith(sockPath); |
| 334 | return !(isPublicFileRequest || isWdsEndpointRequest); |
| 335 | } |
| 336 | |
| 337 | if (!/^http(s)?:\/\//.test(proxy)) { |
| 338 | console.log( |
| 339 | chalk.red( |
| 340 | 'When "proxy" is specified in package.json it must start with either http:// or https://' |
| 341 | ) |
| 342 | ); |
| 343 | process.exit(1); |
| 344 | } |
| 345 | |
| 346 | let target; |
| 347 | if (process.platform === 'win32') { |
| 348 | target = resolveLoopback(proxy); |
| 349 | } else { |
| 350 | target = proxy; |
| 351 | } |
| 352 | return [ |
| 353 | { |
| 354 | target, |
| 355 | logLevel: 'silent', |
| 356 | // For single page apps, we generally want to fallback to /index.html. |
| 357 | // However we also want to respect `proxy` for API calls. |
| 358 | // So if `proxy` is specified as a string, we need to decide which fallback to use. |
| 359 | // We use a heuristic: We want to proxy all the requests that are not meant |
no test coverage detected