Refactor serveFile into separate functions for different use cases
This commit is contained in:
Michael Jackson
parent
8c6912e1a1
commit
34922f6c1b
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@ -20,6 +20,35 @@ const AutoIndex = !process.env.DISABLE_INDEX;
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*/
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const MaximumDepth = 128;
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function serveMetadata(req, res) {
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getMetadata(
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req.packageDir,
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req.filename,
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req.stats,
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MaximumDepth,
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(error, metadata) => {
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if (error) {
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console.error(error);
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res
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.status(500)
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.type("text")
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.send(
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`Cannot generate metadata for ${req.packageSpec}${req.filename}`
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);
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} else {
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// Cache metadata for 1 year.
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res
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.set({
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"Cache-Control": "public, max-age=31536000",
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"Cache-Tag": "meta"
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})
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.send(metadata);
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}
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}
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);
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}
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function rewriteBareModuleIdentifiers(file, packageConfig, callback) {
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const dependencies = Object.assign(
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{},
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@ -40,140 +69,126 @@ function rewriteBareModuleIdentifiers(file, packageConfig, callback) {
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});
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}
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function serveJavaScriptModule(req, res) {
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const file = path.join(req.packageDir, req.filename);
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rewriteBareModuleIdentifiers(file, req.packageConfig, (error, code) => {
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if (error) {
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console.error(error);
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const debugInfo =
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error.constructor.name +
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": " +
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error.message.replace(/^.*?\/unpkg-.+?\//, `/${req.packageSpec}/`) +
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"\n\n" +
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error.codeFrame;
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res
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.status(500)
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.type("text")
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.send(
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`Cannot generate module for ${req.packageSpec}${
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req.filename
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}\n\n${debugInfo}`
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);
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} else {
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// Cache modules for 1 year.
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res
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.set({
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"Content-Type": "application/javascript; charset=utf-8",
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"Content-Length": Buffer.byteLength(code),
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"Cache-Control": "public, max-age=31536000",
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"Cache-Tag": "file,js-file,js-module"
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})
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.send(code);
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}
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});
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}
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function serveStaticFile(req, res) {
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const file = path.join(req.packageDir, req.filename);
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const tags = ["file"];
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const ext = path.extname(req.filename).substr(1);
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if (ext) {
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tags.push(`${ext}-file`);
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}
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let contentType = getFileContentType(file);
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if (contentType === "application/javascript") {
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contentType += "; charset=utf-8";
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}
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// Cache files for 1 year.
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res.set({
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"Content-Type": contentType,
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"Content-Length": req.stats.size,
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"Cache-Control": "public, max-age=31536000",
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"Last-Modified": req.stats.mtime.toUTCString(),
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ETag: etag(req.stats),
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"Cache-Tag": tags.join(",")
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});
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const stream = fs.createReadStream(file);
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stream.on("error", error => {
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console.error(`Cannot send file ${req.packageSpec}${req.filename}`);
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console.error(error);
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res.sendStatus(500);
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});
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stream.pipe(res);
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}
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function serveIndex(req, res) {
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const dir = path.join(req.packageDir, req.filename);
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getEntries(dir).then(
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entries => {
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const html = renderPage(IndexPage, {
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packageInfo: req.packageInfo,
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version: req.packageVersion,
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dir: req.filename,
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entries
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});
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// Cache HTML directory listings for 1 minute.
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res
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.set({
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"Cache-Control": "public, max-age=60",
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"Cache-Tag": "index"
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})
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.send(html);
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},
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error => {
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console.error(error);
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res
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.status(500)
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.type("text")
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.send(`Cannot read entries for ${req.packageSpec}${req.filename}`);
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}
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);
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}
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/**
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* Send the file, JSON metadata, or HTML directory listing.
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*/
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function serveFile(req, res) {
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if (req.query.meta != null) {
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// Serve JSON metadata.
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getMetadata(
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req.packageDir,
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req.filename,
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req.stats,
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MaximumDepth,
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(error, metadata) => {
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if (error) {
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console.error(error);
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res
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.status(500)
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.type("text")
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.send(
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`Cannot generate metadata for ${req.packageSpec}${req.filename}`
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);
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} else {
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// Cache metadata for 1 year.
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res
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.set({
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"Cache-Control": "public, max-age=31536000",
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"Cache-Tag": "meta"
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})
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.send(metadata);
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}
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}
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);
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serveMetadata(req, res);
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} else if (req.stats.isFile()) {
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// Serve a file.
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const file = path.join(req.packageDir, req.filename);
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let contentType = getFileContentType(file);
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const contentType = getFileContentType(req.filename);
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if (contentType === "application/javascript" && req.query.module != null) {
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contentType += "; charset=utf-8";
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// Serve a JavaScript module.
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rewriteBareModuleIdentifiers(file, req.packageConfig, (error, code) => {
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if (error) {
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console.error(error);
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const debugInfo =
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error.constructor.name +
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": " +
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error.message.replace(/^.*?\/unpkg-.+?\//, `/${req.packageSpec}/`) +
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"\n\n" +
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error.codeFrame;
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res
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.status(500)
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.type("text")
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.send(
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`Cannot generate module for ${req.packageSpec}${
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req.filename
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}\n\n${debugInfo}`
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);
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} else {
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// Cache modules for 1 year.
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res
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.set({
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"Content-Type": contentType,
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"Content-Length": Buffer.byteLength(code),
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"Cache-Control": "public, max-age=31536000",
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"Cache-Tag": "file,js-file,js-module"
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})
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.send(code);
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}
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});
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serveJavaScriptModule(req, res);
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} else {
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// Serve some other static file.
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const tags = ["file"];
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const ext = path.extname(req.filename).substr(1);
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if (ext) {
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tags.push(`${ext}-file`);
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}
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if (contentType === "application/javascript") {
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contentType += "; charset=utf-8";
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}
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// Cache files for 1 year.
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res.set({
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"Content-Type": contentType,
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"Content-Length": req.stats.size,
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"Cache-Control": "public, max-age=31536000",
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"Last-Modified": req.stats.mtime.toUTCString(),
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ETag: etag(req.stats),
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"Cache-Tag": tags.join(",")
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});
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const stream = fs.createReadStream(file);
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stream.on("error", error => {
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console.error(`Cannot send file ${req.packageSpec}${req.filename}`);
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console.error(error);
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res.sendStatus(500);
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});
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stream.pipe(res);
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serveStaticFile(req, res);
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}
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} else if (AutoIndex && req.stats.isDirectory()) {
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// Serve an HTML directory listing.
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getEntries(path.join(req.packageDir, req.filename)).then(
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entries => {
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const html = renderPage(IndexPage, {
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packageInfo: req.packageInfo,
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version: req.packageVersion,
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dir: req.filename,
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entries
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});
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// Cache HTML directory listings for 1 minute.
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res
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.set({
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"Cache-Control": "public, max-age=60",
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"Cache-Tag": "index"
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})
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.send(html);
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},
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error => {
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console.error(error);
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res
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.status(500)
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.type("text")
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.send(`Cannot read entries for ${req.packageSpec}${req.filename}`);
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}
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);
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} else if (req.stats.isDirectory() && AutoIndex) {
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serveIndex(req, res);
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} else {
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res
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.status(403)
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