How to use utility - 10 common examples

function passwordMD5(str, key){
    // shaObj 对象存有多种SHA加密值： SHA-512  SHA-1  SHA-224, SHA-256, SHA-384 
    var strMd5 = utility.md5(str);
    //console.log('strMd5:'+strMd5);
    var shaObj = new jsSHA(strMd5, 'TEXT');
    //console.log("SHA-1 : "+shaObj.getHash('SHA-1', 'HEX'));

    return '' === str ? '' : utility.md5(shaObj.getHash('SHA-1', 'HEX') + key);
}

//  HA2 = MD5( "GET:/dir/index.html" )
    //      = 39aff3a2bab6126f332b942af96d3366
    //
    //  Response = MD5( "939e7578ed9e3c518a452acee763bce9:\
    //                   dcd98b7102dd2f0e8b11d0f600bfb0c093:\
    //                   00000001:0a4f113b:auth:\
    //                   39aff3a2bab6126f332b942af96d3366" )
    //           = 6629fae49393a05397450978507c4ef1
    userpass = userpass.split(':');

    var nc = String(++NC);
    nc = NC_PAD.substring(nc.length) + nc;
    var cnonce = crypto.randomBytes(8).toString('hex');

    var ha1 = utility.md5(userpass[0] + ':' + opts.realm + ':' + userpass[1]);
    var ha2 = utility.md5(method.toUpperCase() + ':' + uri);
    var s = ha1 + ':' + opts.nonce;
    if (qop) {
        qop = qop.split(',')[0];
        s += ':' + nc + ':' + cnonce + ':' + qop;
    }
    s += ':' + ha2;
    var response = utility.md5(s);
    var authstring = 'Digest username="' + userpass[0] + '", realm="' + opts.realm
        + '", nonce="' + opts.nonce + '", uri="' + uri
        + '", response="' + response + '"';
    if (opts.opaque) {
        authstring += ', opaque="' + opts.opaque + '"';
    }
    if (qop) {
        authstring += ', qop=' + qop + ', nc=' + nc + ', cnonce="' + cnonce + '"';
    }

if (pwd1 !== pwd) {
            return res.json({
                code: 0,
                msg: 'error'
            });
        }

    }
    // console.log('密码校验结束', pwd, pwd1, pwd2, pwd3);
    // 为了实现修改密码和会员中心修改的同步性，使用这个变量用来区分会员中心和修改密码这两个模块的信息修改
    if (pwd3) {
        // console.log('我是要开始修改密码了');
        // 开始修改密码
        pwd2 = utility.md5(pwd2);
        // 对密码进行再次加密
        pwd = utility.md5(pwd2 + req.app.locals.config.secretKey);
    }

    let user = new User({
        id,
        uname,
        pwd,
        email,
        phone,
        info,
        face
    });


    // console.log(user, req.session.user.id);
    user.update(function (err, result) {
        // console.log(result);

handleSubmit() {
        const { submitState, setSubmitState, update, id } = this.props;

        if(submitState == SUBMITSTATES.SUBMITTING) {
            return;
        }

        setSubmitState(SUBMITSTATES.SUBMITTING);

        const backupConfig = object.clone(this.props.backupConfig);
        for(const key in backupConfig) {
            if(input.isEmpty(backupConfig[key])) {
                delete backupConfig[key];
                continue;
            }
            if(key == "duration" || key == "interval") {
                backupConfig[key] = time.convertToMilliseconds(backupConfig[key]);
            }
        }

        if(!update) {
            //create a new backup
            backups.newBackupConfig(backupConfig)
                    .then(response => {
                        this.submitErr = response.data.message;
                        // redirect to the main page
                        hashHistory.push('/');
                    })

const onError = err => {
      console.error('%s ERROR %s [egg-logger] [%s] %s',
        utility.logDate(','), process.pid, this.options.file, err.stack);
      this.reload();
      console.warn('%s WARN %s [egg-logger] [%s] reloaded', utility.logDate(','), process.pid, this.options.file);
    };
    // only listen error once because stream will reload after error

const onError = err => {
      console.error(
        '%s ERROR %s [logger] [%s] %s',
        utility.logDate(','),
        process.pid,
        filename,
        err.stack
      );
      this.reload();
      console.warn(
        '%s WARN %s [logger] [%s] reloaded',
        utility.logDate(','),
        process.pid,
        filename
      );
    };
    // only listen error once because stream will reload after error

await this.snapshot.delete(key);
          err.name = 'ServerListSnapShotJSONParseError';
          err.unit = unit;
          err.data = data;
          this.emit('error', err);
        }
      }
    }
    if (!hosts || !hosts.length) {
      // 这里主要是为了让后面定时同步可以执行
      this.serverListCache.set(unit, null);
      return null;
    }
    const serverData = {
      hosts,
      index: random(hosts.length),
    };
    this.serverListCache.set(unit, serverData);
    return serverData;
  }

await this.snapshot.delete(key);
          err.name = 'ServerListSnapShotJSONParseError';
          err.unit = unit;
          err.data = data;
          this.emit('error', err);
        }
      }
    }
    if (!hosts || !hosts.length) {
      // 这里主要是为了让后面定时同步可以执行
      this.serverListCache.set(unit, null);
      return null;
    }
    const serverData = {
      hosts,
      index: random(hosts.length),
    };
    this.serverListCache.set(unit, serverData);
    return serverData;
  }

handleSubmit() {
        const { submitState, setSubmitState, update, id } = this.props;

        if(submitState == SUBMITSTATES.SUBMITTING) {
            return;
        }

        setSubmitState(SUBMITSTATES.SUBMITTING);

        const backupConfig = object.clone(this.props.backupConfig);
        for(const key in backupConfig) {
            if(input.isEmpty(backupConfig[key])) {
                delete backupConfig[key];
                continue;
            }
            if(key == "duration" || key == "interval") {
                backupConfig[key] = time.convertToMilliseconds(backupConfig[key]);
            }
        }

        if(!update) {
            //create a new backup
            backups.newBackupConfig(backupConfig)
                    .then(response => {
                        this.submitErr = response.data.message;
                        // redirect to the main page

UserSchema.virtual('avatar_url').get(function () {
  var url = this.avatar || ('//gravatar.com/avatar/' + utility.md5(this.email.toLowerCase()) + '?size=48');

  // www.gravatar.com 被墙
  url = url.replace('//www.gravatar.com', '//gravatar.com');

  // 让协议自适应 protocol
  if (url.indexOf('http:') === 0) {
    url = url.slice(5);
  }

  // 如果是 github 的头像，则限制大小
  if (url.indexOf('githubusercontent') !== -1) {
    url += '&s=120';
  }
  return url;
});