Website Structure

Frontend-Learner/node_modules/koa-static/index.js

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+
+'use strict'
+
+/**
+ * Module dependencies.
+ */
+
+const debug = require('debug')('koa-static')
+const { resolve } = require('path')
+const assert = require('assert')
+const send = require('koa-send')
+
+/**
+ * Expose `serve()`.
+ */
+
+module.exports = serve
+
+/**
+ * Serve static files from `root`.
+ *
+ * @param {String} root
+ * @param {Object} [opts]
+ * @return {Function}
+ * @api public
+ */
+
+function serve (root, opts) {
+  opts = Object.assign({}, opts)
+
+  assert(root, 'root directory is required to serve files')
+
+  // options
+  debug('static "%s" %j', root, opts)
+  opts.root = resolve(root)
+  if (opts.index !== false) opts.index = opts.index || 'index.html'
+
+  if (!opts.defer) {
+    return async function serve (ctx, next) {
+      let done = false
+
+      if (ctx.method === 'HEAD' || ctx.method === 'GET') {
+        try {
+          done = await send(ctx, ctx.path, opts)
+        } catch (err) {
+          if (err.status !== 404) {
+            throw err
+          }
+        }
+      }
+
+      if (!done) {
+        await next()
+      }
+    }
+  }
+
+  return async function serve (ctx, next) {
+    await next()
+
+    if (ctx.method !== 'HEAD' && ctx.method !== 'GET') return
+    // response is already handled
+    if (ctx.body != null || ctx.status !== 404) return // eslint-disable-line
+
+    try {
+      await send(ctx, ctx.path, opts)
+    } catch (err) {
+      if (err.status !== 404) {
+        throw err
+      }
+    }
+  }
+}