初探小程序(二)请求WebService

//这是封装好的求情方法
/**
 * GET请求API
 * @param  {String}   url         接口地址
 * @param  {Object}   params      请求的参数
 * @param  {String}   SOAPAction  SOAP协议
 * @param  {String}   josnResout  XML对应标签
 * @param  {Function} successFun  接口调用成功返回的回调函数
 * @param  {Function} failFun     接口调用失败的回调函数
 */
function requestWebServerApi(url, params, SOAPAction, josnResout, successFunMa, failFun) {
  wx.request({
    url: url,
    method: 'POST',
    data: params,
    header: {
      'content-type': 'text/xml; charset=utf-8',
      'SOAPAction': SOAPAction
    },
    success: function (res) {
      var json = date.stringTurnXmlturnJson(res.data, josnResout);
      if (json.code != 1) {
        wx.showModal({
          title: '提示',
          content: '请求失败',
          showCancel: false,
          confirmColor: "#6C93E0",
          success: function (res) {
            if (res.confirm) { }
          }
        })
      }
      typeof successFunMa == "function" && successFunMa(json)

    },
    fail: function (res) {
      wx.showModal({
        title: '提示',
        content: '请求失败',
        showCancel: false,
        confirmColor: "#6C93E0",
        success: function (res) {
          if (res.confirm) { }
        }
      })
      typeof failFun == 'function' && failFun(res.data)
    }

  })
}

// js文件中的调用
getSchoolCollectInfo: function() {

    wx.showLoading({
      title: '加载中',
    });
    var that = this;
    var method = 'GetSchoolCollectInfoBySchoolCode'; // 方法名
    var keyArr = ['strSchoolCode'];  //参数
    var valueArr = [that.data.schoolId]; //参数值
    var datacopy = date.settingDatacopy(method, keyArr, valueArr);
    var josnResout = 'GetSchoolCollectInfoBySchoolCodeResult'
    request.requestWebServerApi(app.wsdlurl, datacopy, app.targetNamespace + method, josnResout, function (json) {
      wx.hideLoading()
      that.setData({
        schoolName: json.result.SchoolName
      });
     
    }, function (res) { wx.hideLoading()});
  },

//targetNamespace 是命名空间 datacopy是参数值,需要转成XML的格式
function settingDatacopy(n, keyArr, valueArr) {
  var datacopy = '<?xml version="1.0" encoding="utf-8"?>';
  datacopy += '<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:ser="' + app.targetNamespace + '">';
  datacopy += '<soapenv:Header/>';
  datacopy += '<soapenv:Body>';
  //接着拼你要访问的方法名、参数名和你传递的实参值，比如我要访问的方法是getReader(String arg0,int arg1)
  //而我的实际调用是getReader('libsys',2)，所以拼字符串如下
  datacopy += '<ser:' + n + '>';
  for (var index in keyArr) {
    datacopy += '<ser:' + keyArr[index] + '>';
    datacopy += valueArr[index];
    datacopy += '</ser:' + keyArr[index] + '>';
  }
  datacopy += '</ser:' + n + '>';
  datacopy += '</soapenv:Body>';
  datacopy += '</soapenv:Envelope>';

  return datacopy;
}

      var json = date.stringTurnXmlturnJson(res.data, josnResout);

//XML  xml数据
//value  要取出xml数据中的标签
function stringTurnXmlturnJson(XML,value) {
  var Parser = require('../utils/dist/dom-parser.js');
  var XMLParser = new Parser.DOMParser();
  var doc = XMLParser.parseFromString(XML);
  var xmlStr = doc.getElementsByTagName(value)[0].firstChild.nodeValue;//
  var josn = JSON.parse(xmlStr);
  return josn;
}