src/files.js

   1 'use strict';
   2
   3 var async = require('async'),
   4     fs = require('fs'),
   5     path = require('path'),
   6     rm = require('del'),
   7     debug = require('debug')('files'),
   8     mkdirp = require('mkdirp'),
   9     HttpError = require('connect-lastmile').HttpError,
  10     HttpSuccess = require('connect-lastmile').HttpSuccess;
  11
  12 var gBasePath;
  13
  14 exports = module.exports = function (basePath) {
  15     gBasePath = basePath;
  16
  17     return {
  18         get: get,
  19         put: put,
  20         del: del
  21     };
  22 };
  23
  24 // http://stackoverflow.com/questions/11293857/fastest-way-to-copy-file-in-node-js
  25 function copyFile(source, target, cb) {
  26     var cbCalled = false;
  27
  28     // ensure directory
  29     mkdirp(path.dirname(target), function (error) {
  30         if (error) return cb(error);
  31
  32         var rd = fs.createReadStream(source);
  33             rd.on("error", function(err) {
  34             done(err);
  35         });
  36
  37         var wr = fs.createWriteStream(target);
  38             wr.on("error", function(err) {
  39             done(err);
  40         });
  41
  42         wr.on("close", function(ex) {
  43             done();
  44         });
  45
  46         rd.pipe(wr);
  47
  48         function done(err) {
  49             if (!cbCalled) {
  50                 cb(err);
  51                 cbCalled = true;
  52             }
  53         }
  54     });
  55 }
  56
  57 function createDirectory(targetPath, callback) {
  58     mkdirp(targetPath, function (error) {
  59         if (error) return callback(error);
  60         callback(null);
  61     });
  62 }
  63
  64 function getAbsolutePath(filePath) {
  65     var absoluteFilePath = path.resolve(path.join(gBasePath, filePath));
  66
  67     if (absoluteFilePath.indexOf(gBasePath) !== 0) return null;
  68     return absoluteFilePath;
  69 }
  70
  71 function removeBasePath(filePath) {
  72     return filePath.slice(gBasePath.length);
  73 }
  74
  75 function get(req, res, next) {
  76     var filePath = req.params[0];
  77     var absoluteFilePath = getAbsolutePath(filePath);
  78     if (!absoluteFilePath) return next(new HttpError(403, 'Path not allowed'));
  79
  80     fs.stat(absoluteFilePath, function (error, result) {
  81         if (error) return next(new HttpError(404, error));
  82
  83         debug('get', absoluteFilePath);
  84
  85         if (!result.isDirectory() && !result.isFile()) return next(new HttpError(500, 'unsupported type'));
  86         if (result.isFile()) return res.sendFile(absoluteFilePath);
  87
  88         async.map(fs.readdirSync(absoluteFilePath), function (filePath, callback) {
  89             fs.stat(path.join(absoluteFilePath, filePath), function (error, result) {
  90                 if (error) return callback(error);
  91
  92                 callback(null, {
  93                     isDirectory: result.isDirectory(),
  94                     isFile: result.isFile(),
  95                     atime: result.atime,
  96                     mtime: result.mtime,
  97                     ctime: result.ctime,
  98                     birthtime: result.birthtime,
  99                     size: result.size,
 100                     filePath: filePath
 101                 });
 102             });
 103         }, function (error, results) {
 104             if (error) return next(new HttpError(500, error));
 105             res.status(222).send({ entries: results });
 106         });
 107     });
 108 }
 109
 110 function put(req, res, next) {
 111     var filePath = req.params[0];
 112
 113     if (!(req.files && req.files.file) && !req.query.directory) return next(new HttpError(400, 'missing file or directory'));
 114     if ((req.files && req.files.file) && req.query.directory) return next(new HttpError(400, 'either file or directory'));
 115
 116     var absoluteFilePath = getAbsolutePath(filePath);
 117     if (!absoluteFilePath) return next(new HttpError(403, 'Path not allowed'));
 118
 119     fs.stat(absoluteFilePath, function (error, result) {
 120         if (error && error.code !== 'ENOENT') return next(new HttpError(500, error));
 121
 122         debug('put', absoluteFilePath);
 123
 124         if (result && req.query.directory) return next(new HttpError(409, 'name already exists'));
 125         if (result && result.isDirectory()) return next(new HttpError(409, 'cannot put on directories'));
 126
 127         if (req.query.directory) {
 128             return createDirectory(absoluteFilePath, function (error) {
 129                 if (error) return next(new HttpError(500, error));
 130                 next(new HttpSuccess(201, {}));
 131             });
 132         } else if (!result || result.isFile()) {
 133             return copyFile(req.files.file.path, absoluteFilePath, function (error) {
 134                 if (error) return next(new HttpError(500, error));
 135                 next(new HttpSuccess(201, {}));
 136             });
 137         }
 138
 139         return next(new HttpError(500, 'unsupported type'));
 140     });
 141 }
 142
 143 function del(req, res, next) {
 144     var filePath = req.params[0];
 145     var recursive = !!req.query.recursive;
 146     var dryRun = !!req.query.dryRun;
 147
 148     var absoluteFilePath = getAbsolutePath(filePath);
 149     if (!absoluteFilePath) return next(new HttpError(404, 'Not found'));
 150
 151     // absoltueFilePath has to have the base path prepended
 152     if (absoluteFilePath.length <= gBasePath.length) return next(new HttpError(404, 'Not found'));
 153
 154     fs.stat(absoluteFilePath, function (error, result) {
 155         if (error) return next(new HttpError(404, error));
 156
 157         if (result.isDirectory() && !recursive) return next(new HttpError(403, 'Is directory'));
 158
 159         // add globs to get file listing
 160         if (result.isDirectory()) absoluteFilePath += '/**';
 161
 162         rm(absoluteFilePath, { dryRun: dryRun, force: true }).then(function (result) {
 163             result = result.map(removeBasePath);
 164             next(new HttpSuccess(200, { entries: result }));
 165         }, function (error) {
 166             console.error(error);
 167             next(new HttpError(500, 'Unable to remove'));
 168         });
 169     });
 170 }