ht_server/lib/util/ht_file.js

纯后台框架 http

var fs = require("fs"),
    BufferHelper = require('bufferhelper');

exports.readFile = function (fileName, cb) {
    var rs = fs.createReadStream(fileName);
    var bufferHelper = new BufferHelper();
    var data = '';
    rs.on("data", function (chunk) {
        bufferHelper.concat(chunk);
    });
    rs.on("end", function () {
        cb(null, bufferHelper.toBuffer().toString());
    });
    rs.on("error", function (err) {
        console.log("HtFile.readFile arg-(fileName:%s) read error", fileName,err);
        cb(null, null);
    });
}

exports.writeFile = function (fileName, data, cb) {
    fs.writeFile(fileName, data, function (err) {
        if (err) throw err;
        console.log('has finished');
        cb(null);
    });
}

function delFile(fileName) {
    fs.unlink(fileName, function (err) {
        if (err) {
            global.gInfo["logger"].error("删除 " + fileName + " 失败！");
            global.gInfo["logger"].exception(err);
        } else {
            global.gInfo["logger"].info("删除 " + fileName + " 成功！");
        }
    });
}

function _reName(path, newFileName) {
    fs.rename(path, newFileName, function (err) {
        if (err) {
            global.gInfo["logger"].error("HtFile._reName rename  error");
            global.gInfo["logger"].exception(err);
        } else {
            global.gInfo["logger"].info('GgFile._reName renamed complete');
        }
    });
}

function reName(path, newUrl, day, newFileName, cb) {
    fs.exists(newUrl + day, function (flag) {
        if (!flag) {
            fs.mkdir(newUrl + day, 777, function (err) {
                if (err) {
                    return cb(true);
                }
                _reName(path, newUrl + day + "/" + newFileName);
            });
        }
        _reName(path, path, newUrl + day + "/" + newFileName);
    });
}

function exists(file, cb) {
    fs.exists(file, function (flag) {
        return cb(flag);
    });
}

exports.delFile = delFile;
exports.reName = reName;
exports.exists = exists;