Rename server => modules

modules/actions/serveJavaScriptModule.js

@@ -0,0 +1,70 @@
+const etag = require("etag");
+const babel = require("babel-core");
+
+const getContentTypeHeader = require("../utils/getContentTypeHeader");
+const unpkgRewrite = require("../plugins/unpkgRewrite");
+
+function rewriteBareModuleIdentifiers(code, packageConfig) {
+  const dependencies = Object.assign(
+    {},
+    packageConfig.peerDependencies,
+    packageConfig.dependencies
+  );
+
+  const options = {
+    // Ignore .babelrc and package.json babel config
+    // because we haven't installed dependencies so
+    // we can't load plugins; see #84
+    babelrc: false,
+    plugins: [unpkgRewrite(dependencies)]
+  };
+
+  return babel.transform(code, options).code;
+}
+
+function serveJavaScriptModule(req, res) {
+  if (req.entry.contentType !== "application/javascript") {
+    return res
+      .status(403)
+      .type("text")
+      .send("?module mode is available only for JavaScript files");
+  }
+
+  try {
+    const code = rewriteBareModuleIdentifiers(
+      req.entry.content.toString("utf8"),
+      req.packageConfig
+    );
+
+    res
+      .set({
+        "Content-Length": Buffer.byteLength(code),
+        "Content-Type": getContentTypeHeader(req.entry.contentType),
+        "Cache-Control": "public,max-age=31536000", // 1 year
+        ETag: etag(code),
+        "Cache-Tag": "file,js-file,js-module"
+      })
+      .send(code);
+  } catch (error) {
+    console.error(error);
+
+    const errorName = error.constructor.name;
+    const errorMessage = error.message.replace(
+      /^.*?\/unpkg-.+?\//,
+      `/${req.packageSpec}/`
+    );
+    const codeFrame = error.codeFrame;
+    const debugInfo = `${errorName}: ${errorMessage}\n\n${codeFrame}`;
+
+    res
+      .status(500)
+      .type("text")
+      .send(
+        `Cannot generate module for ${req.packageSpec}${
+          req.filename
+        }\n\n${debugInfo}`
+      );
+  }
+}
+
+module.exports = serveJavaScriptModule;