@ublitzjs/static/cjs/serving.cjs


"use strict";
var path = require("node:path"),
  {
    HeadersMap,
    c405,
    c404,
    toAB,
    registerAbort,
    c400,
  } = require("@ublitzjs/core"),
  { urlStartsWith, getRanges } = require("./helpers.cjs"),
  { readdir, stat } = require("node:fs/promises"),
  { sendFile } = require("./index.cjs"),
  shouldAddDirSlash = (path) =>
    path !== "/" && path !== "" && !path.endsWith("/"),
  allowHeaderArray = [toAB("Allow"), toAB("GET, HEAD")],
  simpleHeaders = new HeadersMap({
    Allow: "GET, HEAD",
    "Accept-Ranges": "bytes",
  }).prepare();

async function analyzeFolder(
  outerPath,
  { deleteMimesList, avoid, includeDates }
) {
  var mrmire = require("mrmime");
  // path: {size, content-type}
  var fullPaths = {};
  async function recursiveAnalysis(currentPath, first) {
    var files = await readdir(
      first ? outerPath : outerPath + "/" + currentPath
    );
    var promises = [];
    for (const name of files) {
      if (avoid && avoid.test(name)) continue;
      const innerPath = first ? name : currentPath + "/" + name;
      promises.push(
        stat(outerPath + "/" + innerPath).then((stats) => {
          if (stats.isDirectory()) return recursiveAnalysis(innerPath, false);
          var data = {
            CT:
              mrmire.lookup(path.extname(innerPath)) ||
              "application/octet-stream",
            size: stats.size,
          };
          if (includeDates) {
            data.atime = stats.atime;
            data.mtime = stats.mtime;
            data.ctime = stats.ctime;
            data.birthtime = stats.birthtime;
          }
          fullPaths[innerPath] = data;
        })
      );
    }
    await Promise.all(promises);
  }
  await recursiveAnalysis(outerPath, true);
  // clear unwanted dependency
  if (deleteMimesList) deepDeleteFromCache(require.resolve("mrmime"));
  return fullPaths;
}
function deepDeleteFromCache(modulePath) {
  var mod = require.cache[modulePath];
  if (!mod) return;
  mod.children.forEach((child) => deepDeleteFromCache(child.id));
  delete require.cache[modulePath];
}
function staticServe({ fullRoute, dirPath, paths }, opts = {}) {
  if (!opts.maxChunk) opts.maxChunk = Infinity;
  var prefixRegex = urlStartsWith(fullRoute);
  var getCurrentPath = (req) => req.getUrl().replace(prefixRegex, "");
  function createFileMonolith(req) {
    var monolith = {
      givenUrl: getCurrentPath(req),
      file: undefined,
    };
    if ((monolith.file = paths[monolith.givenUrl])) return monolith;
    var slash = "";
    if (shouldAddDirSlash(monolith.givenUrl)) slash = "/";
    // if there is no file and no index.html
    return (monolith.file = paths[(monolith.givenUrl += slash + "index.html")])
      ? monolith
      : undefined;
  }

  return {
    async get(res, req) {
      registerAbort(res);
      var monolith = createFileMonolith(req);
      if (!monolith) return res.writeStatus(c404).end("NOT FOUND");
      //#region get "range" header
      var range = req.getHeader("range");
      if (range) {
        try {
          var { 0: start, 1: end } = getRanges(
            range,
            monolith.file.size - 1,
            opts.maxChunk
          );
          if (end - start + 1 > opts.maxSize)
            return res.cork(() =>
              res.writeStatus("416").end("Range not satisfiable")
            );
        } catch (error) {
          return res.writeStatus(c400).end(error.message);
        }
      } else if (opts.requireRange)
        return res.writeStatus(c400).end("Range header required");
      //#endregion
      const err = await sendFile(
        {
          res,
          contentType: monolith.file.CT,
          path: dirPath + "/" + monolith.givenUrl,
          maxSize: monolith.file.size,
        },
        {
          start,
          end,
          headers: (res) => {
            if (opts.headers) opts.headers(res);
            simpleHeaders(res);
          },
        }
      );
      if (err && opts.logs) console.error("sendFile error", err);
    },
    head(res, req) {
      res.onAborted(() => {
        res.aborted = true;
      });
      var monolith = createFileMonolith(req);
      if (res.aborted) return;
      if (!monolith) return res.writeStatus(c404).end("NOT FOUND");
      if (opts.headers) opts.headers(res);
      simpleHeaders(
        res.writeHeader("Content-Type", monolith.file.CT)
      ).endWithoutBody(monolith.file.size);
    },
    any(res, req) {
      res.onAborted(() => {
        res.aborted = true;
      });
      var monolith = createFileMonolith(req);
      if (res.aborted) return;
      if (!monolith) return res.writeStatus(c404).end("NOT FOUND");
      res.writeStatus(c405);
      if (opts.headers) opts.headers(res);
      simpleHeaders(res).end("Wrong method");
    },
  };
}
function dynamicServe(routeRegex, dirPath, conf = {}) {
  var getCurrentPath = (req) =>
    dirPath + "/" + req.getUrl().replace(routeRegex, "");
  var mrmime = require("mrmime");
  return {
    async get(res, req) {
      registerAbort(res);
      var currentPath = getCurrentPath(req);
      var range = req.getHeader("range");
      //#region find file stats
      try {
        if (conf.avoid && conf.avoid.test(currentPath))
          throw new Error("Avoid regex matched");

        var file = await stat(currentPath);

        if (file.isDirectory()) {
          //#region look for index.html
          let str = "";
          if (shouldAddDirSlash(currentPath)) str = "/";
          currentPath += str + "index.html";
          file = await stat(currentPath);
          //#endregion
        }
      } catch {
        if (res.aborted) return;
        return res.cork(() => res.writeStatus(c404).end("NOT FOUND"));
      }
      //#endregion

      if (res.aborted) return;
      //#region get "range" header
      if (range) {
        try {
          var { 0: start, 1: end } = getRanges(
            range,
            file.size - 1,
            conf.maxChunk
          );
          if (end - start + 1 > conf.maxSize)
            return res.cork(() =>
              res.writeStatus("416").end("Range not satisfiable")
            );
        } catch (error) {
          return res.cork(() => res.writeStatus(c400).end(error.message));
        }
      } else if (conf.requireRange)
        return res.cork(() =>
          res.writeStatus(c400).end("Range header required")
        );
      //#endregion
      //#region send file
      const err = await sendFile(
        {
          res,
          contentType:
            mrmime.lookup(path.extname(currentPath)) ||
            "application/octet-stream",
          path: currentPath,
          maxSize: file.size,
        },
        {
          start,
          end,
          headers: (res) => {
            if (conf.headers) conf.headers(res);
            simpleHeaders(res);
          },
        }
      );
      if (err && conf.logs) console.error(err);
      //#endregion
    },
    async head(res, req) {
      res.onAborted(() => {
        res.aborted = true;
      });
      var currentPath = getCurrentPath(req);
      try {
        var file = await stat(currentPath);
        if (file.isDirectory() /*get html*/) {
          let str = "";
          if (shouldAddDirSlash(currentPath)) str = "/";
          currentPath += str + "index.html";
          file = await stat(currentPath);
        }
      } catch {
        if (res.aborted) return;
        return res.cork(() => res.writeStatus(c404).end("NOT FOUND"));
      }
      if (res.aborted) return;
      res.cork(() => {
        if (conf.headers) conf.headers(res);
        res
          .writeHeader(allowHeaderArray[0], allowHeaderArray[1])
          .writeHeader("Content-Type", file.CT)
          .endWithoutBody(file.size);
      });
    },
    async any(res, req) {
      res.onAborted(() => {
        res.aborted = true;
      });
      var currentPath = getCurrentPath(req);
      try {
        var file = await stat(currentPath);
        if (file.isDirectory() /*get html*/) {
          let str = "";
          if (shouldAddDirSlash(currentPath)) str = "/";
          currentPath += str + "index.html";
          file = await stat(currentPath);
        }
      } catch {
        if (res.aborted) return;
        return res.cork(() => res.writeStatus(c404).end("NOT FOUND"));
      }
      if (res.aborted) return;
      res.cork(() => {
        res.writeStatus(c405);
        if (conf.headers) conf.headers(res);
        res
          .writeHeader(allowHeaderArray[0], allowHeaderArray[1])
          .end("Wrong method");
      });
    },
  };
}

function createFileMonolithForStaticMulti(folders, fallback, req) {
  var monolith = {
    givenUrl: req.getUrl(),
    file: undefined,
    dir: undefined,
  };
  //#region find the right folder AND replace givenUrl
  var rightFolder;
  for (const folder of folders) {
    if (!folder.regex.test(monolith.givenUrl)) continue;
    monolith.givenUrl = monolith.givenUrl.replace(folder.regex, "");
    rightFolder = folder;
    monolith.dir = rightFolder.dir;
    break;
  }
  //#endregion

  //#region if no right folder - use fallback or return
  if (!rightFolder) {
    if (!fallback) return undefined;
    monolith.givenUrl = monolith.givenUrl.replace("/", "");
    monolith.dir = fallback.dir;
    monolith.file = fallback.paths[monolith.givenUrl];
    if (monolith.file) return monolith;
    setIndexHtmlOnMonolith(monolith, fallback.paths);
    return monolith.file ? monolith : undefined;
  }
  //#endregion

  //#region set monolith.file to needed one or index.html
  monolith.file = rightFolder.paths[monolith.givenUrl];
  if (monolith.file) return monolith;
  setIndexHtmlOnMonolith(monolith, rightFolder.paths);
  return monolith.file ? monolith : undefined;
  //#endregion
}
function staticServeMulti(
  { folders, fallback },
  { headers, logs, maxChunk, requireRange } = {}
) {
  return {
    async get(res, req) {
      registerAbort(res);

      //#region check if file exists
      var monolith = createFileMonolithForStaticMulti(folders, fallback, req);
      if (res.aborted) return;
      if (!monolith) return res.writeStatus(c404).end("NOT FOUND");
      //#endregion

      //#region get "range" header
      var range = req.getHeader("range");
      if (range) {
        try {
          var { 0: start, 1: end } = getRanges(
            range,
            monolith.file.size - 1,
            maxChunk
          );
          if (end - start + 1 > monolith.file.size)
            return res.cork(() =>
              res.writeStatus("416").end("Range not satisfiable")
            );
        } catch (error) {
          return res.writeStatus(c400).end(error.message);
        }
      } else if (requireRange)
        return res.writeStatus(c400).end("Range header required");
      //#endregion

      //#region send file
      const error = await sendFile(
        {
          res,
          path: monolith.dir + "/" + monolith.givenUrl,
          contentType: monolith.file.CT,
          maxSize: monolith.file.size,
        },
        {
          start,
          end,
          headers: (res) => {
            if (headers) headers(res);
            simpleHeaders(res);
          },
        }
      );
      if (error && logs) console.error(error);
      //#endregion
    },
    head(res, req) {
      res.onAborted(() => {
        res.aborted = true;
      });
      var monolith = createFileMonolithForStaticMulti(folders, fallback, req);
      if (res.aborted) return;
      if (!monolith) return res.writeStatus(c404).end("NOT FOUND");
      simpleHeaders(
        res.writeHeader("Content-Type", monolith.file.CT)
      ).endWithoutBody(monolith.file.size);
    },
    any(res, req) {
      res.onAborted(() => {
        res.aborted = true;
      });
      var monolith = createFileMonolithForStaticMulti(folders, fallback, req);
      if (res.aborted) return;
      if (!monolith) return res.writeStatus(c404).end("NOT FOUND");

      res.writeStatus(c405);
      if (headers) headers(res);
      res
        .writeHeader(allowHeaderArray[0], allowHeaderArray[1])
        .end("Wrong method");
    },
  };
}

function setIndexHtmlOnMonolith(monolith, paths) {
  var slash = "";
  if (shouldAddDirSlash(monolith.givenUrl)) slash = "/";
  monolith.givenUrl += slash + "index.html";
  monolith.file = paths[monolith.givenUrl];
}
module.exports = { staticServe, staticServeMulti, dynamicServe, analyzeFolder };