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node_modules/launch-editor-middleware/index.js

@@ -0,0 +1,42 @@
+const path = require('path')
+const launch = require('launch-editor')
+
+module.exports = (specifiedEditor, srcRoot, onErrorCallback) => {
+  if (typeof specifiedEditor === 'function') {
+    onErrorCallback = specifiedEditor
+    specifiedEditor = undefined
+  }
+
+  if (typeof srcRoot === 'function') {
+    onErrorCallback = srcRoot
+    srcRoot = undefined
+  }
+
+  srcRoot = srcRoot || process.cwd()
+
+  return function launchEditorMiddleware(req, res) {
+    let url
+
+    try {
+      const fullUrl = req.url.startsWith('http') ? req.url : `http://localhost${req.url}`
+      url = new URL(fullUrl)
+      // eslint-disable-next-line no-unused-vars
+    } catch (_err) {
+      res.statusCode = 500
+      res.end(`launch-editor-middleware: invalid URL.`)
+      return
+    }
+
+    const file = url.searchParams.get('file')
+    if (!file) {
+      res.statusCode = 500
+      res.end(
+        `launch-editor-middleware: required query param "file" is missing.`
+      )
+    } else {
+      const resolved = file.startsWith('file://') ? file : path.resolve(srcRoot, file)
+      launch(resolved, specifiedEditor, onErrorCallback)
+      res.end()
+    }
+  }
+}