xx-weixin-pay/lib/util.js

weixin payment

const xml2js = require('xml2js');

exports.buildXML = function (json) {
  const builder = new xml2js.Builder();
  return builder.buildObject(json);
};

exports.parseXML = function (xml, fn) {
  const parser = new xml2js.Parser({ trim: true, explicitArray: false, explicitRoot: false });
  parser.parseString(xml, fn || function (err, result) {
    });
};

exports.parseRaw = function () {
  return function (req, res, next) {
    const buffer = [];
    req.on('data', function (trunk) {
      buffer.push(trunk);
    });
    req.on('end', function () {
      req.rawbody = Buffer.concat(buffer).toString('utf8');
      next();
    });
    req.on('error', function (err) {
      next(err);
    });
  }
};

exports.pipe = function (stream, fn) {
  const buffers = [];
  stream.on('data', function (trunk) {
    buffers.push(trunk);
  });
  stream.on('end', function () {
    fn(null, Buffer.concat(buffers));
  });
  stream.once('error', fn);
};

exports.mix = function () {
  const root = arguments[0];
  if (arguments.length == 1) {
    return root;
  }
  for (let i = 1; i < arguments.length; i++) {
    for (const k in arguments[i]) {
      root[k] = arguments[i][k];
    }
  }
  return root;
};

exports.generateNonceString = function (length) {
  const chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
  const maxPos = chars.length;
  let noceStr = "";
  for (let i = 0; i < (length || 32); i++) {
    noceStr += chars.charAt(Math.floor(Math.random() * maxPos));
  }
  return noceStr;
};