详解微信小程序网络请求接口封装实例

/**  * 接口公共访问方法  * @param {Object} urlPath 访问路径  * @param {Object} params 访问参数（json格式）  * @param {Object} requestCode 访问码，返回处理使用  * @param {Object} onSuccess 成功回调  * @param {Object} onErrorBefore 失败回调  * @param {Object} onComplete 请求完成（不管成功或失败）回调  * @param {Object} isVerify 是否验证重复提交  * @param {Object} requestType 请求类型（默认POST）  * @param {Object} retry 访问失败重新请求次数（默认1次）  */ webCall: function (urlPath, params, requestCode, onSuccess, onErrorBefore, onComplete, isVerify, requestType, retry) {  var params = arguments[1] ? arguments[1] : {};  //var requestCode = arguments[2] ? arguments[2] : 1;  var onSuccess = arguments[3] ? arguments[3] : function () { };  var onErrorBefore = arguments[4] ? arguments[4] : this.onError;  var onComplete = arguments[5] ? arguments[5] : this.onComplete;  var isVerify = arguments[6] ? arguments[6] : false;  var requestType = arguments[7] ? arguments[7] : "POST";  var retry = arguments[8] ? arguments[8] : 1;  var that = this;  //防止重复提交，相同请求间隔时间不能小于500毫秒  var nowTime = new Date().getTime();  if (this.requestCount[urlPath] && (nowTime - this.requestCount[urlPath]) < 500) {   return;  }  this.requestCount[urlPath] = nowTime;  //是否验证重复提交  if (isVerify) {   if (this.verifyCount[urlPath]) {    return;   }   this.verifyCount[urlPath] = true; //重复验证开关开启  }  console.log("发起网络请求, 路径:" + (that.apiHost + urlPath) + ", 参数:" + JSON.stringify(params));  wx.request({   url: that.apiHost + urlPath,   data: params,   method: requestType, // OPTIONS, GET, HEAD, POST, PUT, DELETE, TRACE, CONNECT   header: {    'content-type': requestType == 'POST' ?     'application/x-www-form-urlencoded' : 'application/json'   }, // 设置请求的 header   success: function (res) {    console.log("返回结果：" + JSON.stringify(res.data));    if (res.data) {     if (res.data.statusCode == 200) { //访问成功      onSuccess(res.data, requestCode);     } else if (res.data.statusCode == 300000001) { // 未登录      that.isLogin = false;      onErrorBefore(0, res.data.message, requestCode);     } else {      onErrorBefore(0, res.data.message == null ? "请求失败 , 请重试" : res.data.message, requestCode);     }    } else {     onErrorBefore(0, "请求失败 , 请重试", requestCode);    }   },   fail: function (res) {    retry--;    console.log("网络访问失败：" + JSON.stringify(res));    if (retry > 0) return that.webCall(urlPath, params, requestCode, onSuccess, onErrorBefore, onComplete, requestType, retry);   },   complete: function (res) {    onComplete(requestCode);    //请求完成后，2秒后重复验证的开关关闭    if (isVerify) {     setTimeout(function () {      that.verifyCount[urlPath] = false;     }, 2000);    }   }  }) }

 complete: function (res) {    onComplete(requestCode);    //请求完成后，2秒后重复验证的开关关闭    if (isVerify) {     setTimeout(function () {      that.verifyCount[urlPath] = false;     }, 2000);    }   }  })

 // 请求 home banner 数据  wx.showNavigationBarLoading();  app.webCall("/app/homeBanner", {}, QUERY_BANNER, this.onSuccess, this.onErrorBefore, this.onComplete);

 /**  * 接口访问成功返回  * @param {Object} data  * @param {Object} requestCode  */ onSuccess: function (data, requestCode) {   var that = this;  switch (requestCode) {   case QUERY_BANNER:    that.setData({ bannerData: (data ? data.data : []) });    break;  }

/**  * 接口访问完成  * @param {Object} resultCode  */ onComplete: function (resultCode) {  console.log("home onComplete1");  if (--mCurrentRequestNums <= 0) {   wx.hideNavigationBarLoading();  } }