微信小程序 POST请求（网络请求）详解及实例代码

2019-11-19 18:57:34

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微信小程序 POST请求

微信小程序开发中网络请求必不可少.GET.POST请求是最常用的.GET请求，POST请求的时候有好几个坑.我已经为大家填好了.

<img src="http://img.blog.csdn.net/20161017170933243?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQv/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center" align="middle" alt="" />

按照文档,肯定是这么写.那就入坑了.

1. 'Content-Type': 'application/json'用在get请求中没问题.

POST请求就不好使了.需要改成: "Content-Type": "application/x-www-form-urlencoded"

2016.11.10更新:有同学在将content-type 修改为小写后,post请求成功.

2. 加上method: "POST"

3.data: { cityname: "上海", key: "1430ec127e097e1113259c5e1be1ba70" }写成json格式这样也是请求不到数据的.需要转格式.

下面直接贴代码:

3.1

<span style="font-size:24px;">//index.js //获取应用实例 var app = getApp() Page( {  data: {   toastHidden: true,   city_name: '',  },  onLoad: function() {   that = this;   wx.request( {    url: "http://op.juhe.cn/onebox/weather/query",    header: {     "Content-Type": "application/x-www-form-urlencoded"    },    method: "POST",    //data: { cityname: "上海", key: "1430ec127e097e1113259c5e1be1ba70" },    data: Util.json2Form( { cityname: "上海", key: "1430ec127e097e1113259c5e1be1ba70" }),    complete: function( res ) {     that.setData( {      toastHidden: false,      toastText: res.data.reason,      city_name: res.data.result.data.realtime.city_name,      date: res.data.result.data.realtime.date,      info: res.data.result.data.realtime.weather.info,     });     if( res == null || res.data == null ) {      console.error( '网络请求失败' );      return;     }    }   })  },  onToastChanged: function() {   that.setData( { toastHidden: true });  } }) var that; var Util = require( '../../utils/util.js' );</span>

3.2

<span style="font-size:24px;"><!--index.wxml--> <view class="container">   <toast hidden="{{toastHidden}}" bindchange="onToastChanged">     {{toastText}}   </toast>   <view>{{city_name}}</view>   <view>{{date}}</view>   <view>{{info}}</view> </view></span>

3.3

<span style="font-size:24px;">//util.js function json2Form(json) {   var str = [];   for(var p in json){     str.push(encodeURIComponent(p) + "=" + encodeURIComponent(json[p]));   }   return str.join("&"); } module.exports = {  json2Form:json2Form, }</span>