WIP - add extractor, generate snippet_data

node_modules/webpack-dev-middleware/lib/middleware.js

@@ -0,0 +1,136 @@
+'use strict';
+
+const path = require('path');
+
+const mime = require('mime');
+
+const DevMiddlewareError = require('./DevMiddlewareError');
+const {
+  getFilenameFromUrl,
+  handleRangeHeaders,
+  handleRequest,
+  ready,
+} = require('./util');
+
+// Do not add a charset to the Content-Type header of these file types
+// otherwise the client will fail to render them correctly.
+const NonCharsetFileTypes = /\.(wasm|usdz)$/;
+
+module.exports = function wrapper(context) {
+  return function middleware(req, res, next) {
+    // fixes #282. credit @cexoso. in certain edge situations res.locals is
+    // undefined.
+    // eslint-disable-next-line no-param-reassign
+    res.locals = res.locals || {};
+
+    function goNext() {
+      if (!context.options.serverSideRender) {
+        return next();
+      }
+
+      return new Promise((resolve) => {
+        ready(
+          context,
+          () => {
+            // eslint-disable-next-line no-param-reassign
+            res.locals.webpackStats = context.webpackStats;
+            // eslint-disable-next-line no-param-reassign
+            res.locals.fs = context.fs;
+
+            resolve(next());
+          },
+          req
+        );
+      });
+    }
+
+    const acceptedMethods = context.options.methods || ['GET', 'HEAD'];
+
+    if (acceptedMethods.indexOf(req.method) === -1) {
+      return goNext();
+    }
+
+    let filename = getFilenameFromUrl(
+      context.options.publicPath,
+      context.compiler,
+      req.url
+    );
+
+    if (filename === false) {
+      return goNext();
+    }
+
+    return new Promise((resolve) => {
+      handleRequest(context, filename, processRequest, req);
+      // eslint-disable-next-line consistent-return
+      function processRequest() {
+        try {
+          let stat = context.fs.statSync(filename);
+
+          if (!stat.isFile()) {
+            if (stat.isDirectory()) {
+              let { index } = context.options;
+
+              // eslint-disable-next-line no-undefined
+              if (index === undefined || index === true) {
+                index = 'index.html';
+              } else if (!index) {
+                throw new DevMiddlewareError('next');
+              }
+
+              filename = path.posix.join(filename, index);
+              stat = context.fs.statSync(filename);
+
+              if (!stat.isFile()) {
+                throw new DevMiddlewareError('next');
+              }
+            } else {
+              throw new DevMiddlewareError('next');
+            }
+          }
+        } catch (e) {
+          return resolve(goNext());
+        }
+
+        // server content
+        let content = context.fs.readFileSync(filename);
+
+        content = handleRangeHeaders(content, req, res);
+
+        let contentType = mime.getType(filename) || '';
+
+        if (!NonCharsetFileTypes.test(filename)) {
+          contentType += '; charset=UTF-8';
+        }
+
+        if (!res.getHeader || !res.getHeader('Content-Type')) {
+          res.setHeader('Content-Type', contentType);
+        }
+
+        res.setHeader('Content-Length', content.length);
+
+        const { headers } = context.options;
+
+        if (headers) {
+          for (const name in headers) {
+            if ({}.hasOwnProperty.call(headers, name)) {
+              res.setHeader(name, context.options.headers[name]);
+            }
+          }
+        }
+
+        // Express automatically sets the statusCode to 200, but not all servers do (Koa).
+        // eslint-disable-next-line no-param-reassign
+        res.statusCode = res.statusCode || 200;
+
+        if (res.send) {
+          res.send(content);
+        } else {
+          res.end(content);
+        }
+
+        resolve();
+      }
+    });
+  };
+};