serve-static.mjs 5.0 KB

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  1. // src/serve-static.ts
  2. import { getMimeType } from "hono/utils/mime";
  3. import { createReadStream, statSync, existsSync } from "fs";
  4. import { join } from "path";
  5. import { versions } from "process";
  6. import { Readable } from "stream";
  7. var COMPRESSIBLE_CONTENT_TYPE_REGEX = /^\s*(?:text\/[^;\s]+|application\/(?:javascript|json|xml|xml-dtd|ecmascript|dart|postscript|rtf|tar|toml|vnd\.dart|vnd\.ms-fontobject|vnd\.ms-opentype|wasm|x-httpd-php|x-javascript|x-ns-proxy-autoconfig|x-sh|x-tar|x-virtualbox-hdd|x-virtualbox-ova|x-virtualbox-ovf|x-virtualbox-vbox|x-virtualbox-vdi|x-virtualbox-vhd|x-virtualbox-vmdk|x-www-form-urlencoded)|font\/(?:otf|ttf)|image\/(?:bmp|vnd\.adobe\.photoshop|vnd\.microsoft\.icon|vnd\.ms-dds|x-icon|x-ms-bmp)|message\/rfc822|model\/gltf-binary|x-shader\/x-fragment|x-shader\/x-vertex|[^;\s]+?\+(?:json|text|xml|yaml))(?:[;\s]|$)/i;
  8. var ENCODINGS = {
  9. br: ".br",
  10. zstd: ".zst",
  11. gzip: ".gz"
  12. };
  13. var ENCODINGS_ORDERED_KEYS = Object.keys(ENCODINGS);
  14. var pr54206Applied = () => {
  15. const [major, minor] = versions.node.split(".").map((component) => parseInt(component));
  16. return major >= 23 || major === 22 && minor >= 7 || major === 20 && minor >= 18;
  17. };
  18. var useReadableToWeb = pr54206Applied();
  19. var createStreamBody = (stream) => {
  20. if (useReadableToWeb) {
  21. return Readable.toWeb(stream);
  22. }
  23. const body = new ReadableStream({
  24. start(controller) {
  25. stream.on("data", (chunk) => {
  26. controller.enqueue(chunk);
  27. });
  28. stream.on("error", (err) => {
  29. controller.error(err);
  30. });
  31. stream.on("end", () => {
  32. controller.close();
  33. });
  34. },
  35. cancel() {
  36. stream.destroy();
  37. }
  38. });
  39. return body;
  40. };
  41. var getStats = (path) => {
  42. let stats;
  43. try {
  44. stats = statSync(path);
  45. } catch {
  46. }
  47. return stats;
  48. };
  49. var tryDecode = (str, decoder) => {
  50. try {
  51. return decoder(str);
  52. } catch {
  53. return str.replace(/(?:%[0-9A-Fa-f]{2})+/g, (match) => {
  54. try {
  55. return decoder(match);
  56. } catch {
  57. return match;
  58. }
  59. });
  60. }
  61. };
  62. var tryDecodeURI = (str) => tryDecode(str, decodeURI);
  63. var serveStatic = (options = { root: "" }) => {
  64. const root = options.root || "";
  65. const optionPath = options.path;
  66. if (root !== "" && !existsSync(root)) {
  67. console.error(`serveStatic: root path '${root}' is not found, are you sure it's correct?`);
  68. }
  69. return async (c, next) => {
  70. if (c.finalized) {
  71. return next();
  72. }
  73. let filename;
  74. if (optionPath) {
  75. filename = optionPath;
  76. } else {
  77. try {
  78. filename = tryDecodeURI(c.req.path);
  79. if (/(?:^|[\/\\])\.{1,2}(?:$|[\/\\])|[\/\\]{2,}/.test(filename)) {
  80. throw new Error();
  81. }
  82. } catch {
  83. await options.onNotFound?.(c.req.path, c);
  84. return next();
  85. }
  86. }
  87. let path = join(
  88. root,
  89. !optionPath && options.rewriteRequestPath ? options.rewriteRequestPath(filename, c) : filename
  90. );
  91. let stats = getStats(path);
  92. if (stats && stats.isDirectory()) {
  93. const indexFile = options.index ?? "index.html";
  94. path = join(path, indexFile);
  95. stats = getStats(path);
  96. }
  97. if (!stats) {
  98. await options.onNotFound?.(path, c);
  99. return next();
  100. }
  101. const mimeType = getMimeType(path);
  102. c.header("Content-Type", mimeType || "application/octet-stream");
  103. if (options.precompressed && (!mimeType || COMPRESSIBLE_CONTENT_TYPE_REGEX.test(mimeType))) {
  104. const acceptEncodingSet = new Set(
  105. c.req.header("Accept-Encoding")?.split(",").map((encoding) => encoding.trim())
  106. );
  107. for (const encoding of ENCODINGS_ORDERED_KEYS) {
  108. if (!acceptEncodingSet.has(encoding)) {
  109. continue;
  110. }
  111. const precompressedStats = getStats(path + ENCODINGS[encoding]);
  112. if (precompressedStats) {
  113. c.header("Content-Encoding", encoding);
  114. c.header("Vary", "Accept-Encoding", { append: true });
  115. stats = precompressedStats;
  116. path = path + ENCODINGS[encoding];
  117. break;
  118. }
  119. }
  120. }
  121. let result;
  122. const size = stats.size;
  123. const range = c.req.header("range") || "";
  124. if (c.req.method == "HEAD" || c.req.method == "OPTIONS") {
  125. c.header("Content-Length", size.toString());
  126. c.status(200);
  127. result = c.body(null);
  128. } else if (!range) {
  129. c.header("Content-Length", size.toString());
  130. result = c.body(createStreamBody(createReadStream(path)), 200);
  131. } else {
  132. c.header("Accept-Ranges", "bytes");
  133. c.header("Date", stats.birthtime.toUTCString());
  134. const parts = range.replace(/bytes=/, "").split("-", 2);
  135. const start = parseInt(parts[0], 10) || 0;
  136. let end = parseInt(parts[1], 10) || size - 1;
  137. if (size < end - start + 1) {
  138. end = size - 1;
  139. }
  140. const chunksize = end - start + 1;
  141. const stream = createReadStream(path, { start, end });
  142. c.header("Content-Length", chunksize.toString());
  143. c.header("Content-Range", `bytes ${start}-${end}/${stats.size}`);
  144. result = c.body(createStreamBody(stream), 206);
  145. }
  146. await options.onFound?.(path, c);
  147. return result;
  148. };
  149. };
  150. export {
  151. serveStatic
  152. };