Move old backend code to old_src folder

Signed-off-by: David Mehren <git@herrmehren.de>

old_src/lib/web/middleware/checkURIValid.ts

@@ -0,0 +1,13 @@
+import { logger } from '../../logger'
+import { errors } from '../../errors'
+import { NextFunction, Request, Response } from 'express'
+
+export function checkURI (req: Request, res: Response, next: NextFunction): void {
+  try {
+    decodeURIComponent(req.path)
+    next()
+  } catch (err) {
+    logger.error(err)
+    errors.errorBadRequest(res)
+  }
+}

old_src/lib/web/middleware/codiMDVersion.ts

@@ -0,0 +1,9 @@
+import { config } from '../../config'
+import { NextFunction, Request, Response } from 'express'
+
+export function codiMDVersion (req: Request, res: Response, next: NextFunction): void {
+  res.set({
+    'CodiMD-Version': config.version
+  })
+  return next()
+}

old_src/lib/web/middleware/index.ts

@@ -0,0 +1,6 @@
+import { checkURI } from './checkURIValid'
+import { codiMDVersion } from './codiMDVersion'
+import { redirectWithoutTrailingSlashes } from './redirectWithoutTrailingSlashes'
+import { tooBusy } from './tooBusy'
+
+export { checkURI, codiMDVersion, redirectWithoutTrailingSlashes, tooBusy }

old_src/lib/web/middleware/redirectWithoutTrailingSlashes.ts

@@ -0,0 +1,16 @@
+import { NextFunction, Request, Response } from 'express'
+import { config } from '../../config'
+
+export function redirectWithoutTrailingSlashes (req: Request, res: Response, next: NextFunction): void {
+  if (req.method === 'GET' && req.path.substr(-1) === '/' && req.path.length > 1) {
+    const queryString: string = req.url.slice(req.path.length)
+    const urlPath: string = req.path.slice(0, -1)
+    let serverURL: string = config.serverURL
+    if (config.urlPath) {
+      serverURL = serverURL.slice(0, -(config.urlPath.length + 1))
+    }
+    res.redirect(301, serverURL + urlPath + queryString)
+  } else {
+    next()
+  }
+}

old_src/lib/web/middleware/tooBusy.ts

@@ -0,0 +1,14 @@
+import toobusy from 'toobusy-js'
+import { errors } from '../../errors'
+import { config } from '../../config'
+import { NextFunction, Request, Response } from 'express'
+
+toobusy.maxLag(config.tooBusyLag)
+
+export function tooBusy (req: Request, res: Response, next: NextFunction): void {
+  if (toobusy()) {
+    errors.errorServiceUnavailable(res)
+  } else {
+    next()
+  }
+}