blueimp-file-uploader-express/lib/fileinfo.js

This is a File Uploader for Node.js, the project is based on Blueimp jQuery File Upload developed by Sebastian Tschan.

/*jslint node: true*/

"use strict";


var fs          = require("fs"),
    path        = require("path"),
    _existsSync = fs.existsSync || path.existsSync, // Since Node 0.8, .existsSync() was moved from path to fs:
    udf
;


var getFileKey = function(filePath) {
    return path.basename(filePath);
};


function FileInfo(file, opts, fields) {
    this.name       = file.name;
    this.size       = file.size;
    this.type       = file.type;
    this.modified   = file.lastMod;
    this.deleteType = "DELETE";
    this.options    = opts;
    this.key        = getFileKey(file.path);
    this.versions   = {};
    this.proccessed = false;
    this.width      = udf;
    this.height     = udf;
    this.fields     = fields;
    this.awsFile    = file.awsFile;
    if (opts.saveFile) {
        this.safeName();
    }
}


FileInfo.prototype.update = function(file) {
    this.size = file.size;
};


FileInfo.prototype.safeName = function() {
    var nameCountRegexp = /(?:(?: \(([\d]+)\))?(\.[^.]+))?$/;

    function nameCountFunc(s, index, ext) {
        return "(" + ((parseInt(index, 10) || 0) + 1) + ")" + (ext || "");
    }

    // Prevent directory traversal and creating hidden system files:
    this.name = path.basename(this.name).replace(/^\.+/, "");

    // Prevent overwriting existing files:
    while (_existsSync(this.options.uploadDir + "/" + this.name)) {
        this.name = this.name.replace(nameCountRegexp, nameCountFunc);
    }
};


FileInfo.prototype.initUrls = function() {
    var that = this;
    var baseUrl;

    if (this.error) {
        return;
    }

    if (that.options.storage.type === "local") {
        baseUrl = (that.options.useSSL ? "https:" : "http:") + "//" + that.options.host + that.options.uploadUrl + encodeURIComponent(that.name);

        that.deleteUrl = baseUrl;

        if (!that.hasVersionImages()) {
            return;
        }

        Object.keys(that.options.imageVersions).forEach(function(version) {
            if (_existsSync(that.options.uploadDir + "/" + version + "/" + that.name)) {
                that[version + "Url"] = baseUrl + version + "/" + encodeURIComponent(that.name);
            } else {
                // create version failed, use the default url as version url
                that[version + "Url"] = baseUrl;
            }
        });

        return;
    }

    if (that.options.storage.type === "aws") {
        baseUrl = (that.options.useSSL ? "https:" : "http:") + "//s3.amazonaws.com/" + that.options.storage.aws.bucketName + "/" + that.name;

        that.deleteUrl = (that.options.useSSL ? "https:" : "http:") + "//" + that.options.host + that.options.uploadUrl + that.name;

        if (!that.hasVersionImages()) {
            return;
        }

        Object.keys(that.options.imageVersions).forEach(function(version) {
            that[version + "Url"] = baseUrl;
        });
    }
};


FileInfo.prototype.validate = function() {
    if (this.options.minFileSize && this.options.minFileSize > this.size) {
        this.error = "File is too small";
    } else if (this.options.maxFileSize && this.options.maxFileSize < this.size) {
        this.error = "File is too big";
    } else if (!this.options.acceptFileTypes.test(this.name)) {
        this.error = "Filetype not allowed";
    }
    return !this.error;
};


FileInfo.prototype.hasVersionImages = function() {
    return (this.options.copyImgAsThumb && this.options.imageTypes.test(this.url));
};


module.exports = FileInfo;
module.exports.getFileKey = getFileKey;