app/utils/http.js

let server = {
	baseHost: '',
	host: '',
	mapKey: '', //高德地图key
	staticMapKey: '', //腾讯静态地图key
	api: {
		login: '',
		uploadImg: ''
	}
}

let request = (obj, method) => {
	let api = obj.api,
		params = obj.params ? obj.params : {},
		cb = obj.cb ? obj.cb : null,
		failCb = obj.failCb ? obj.failCb : null,
		hideLoading = obj.hideLoading ? obj.hideLoading : false;

	/**
	 * 重构api
	 */
	if (typeof server.api[api] == 'undefined') {
		wx.showModal({
			title: '错误',
			content: `接口${api}不存在`,
			showCancel: false
		})

		return
	}
	let url = server.baseHost + server.api[api];

	if (!hideLoading) {
		wx.showLoading({
			title: "加载中"
		})
	}
	/**
	 * 重构params，加上token
	 */
	if (api != 'login') {
		if (wx.getStorageSync('token')) {
			params.token = wx.getStorageSync('token')
		} else {
			//重新登录
			login(() => {
				request(obj, method)
			})
		}
	}

	/**
	 * http类型
	 */
	let header = {}
	if (method == 'POST') {
		header = {
			'Content-Type': 'application/x-www-form-urlencoded'
		}
	}

	/**
	 * 发送http请求
	 */
	wx.request({
		url,
		data: params,
		header,
		method,
		dataType: 'json',
		responseType: 'text',
		success(res) {
			if (!hideLoading) {
				wx.hideLoading()
			}
			switch (res.data.code) {
				case 1:
					cb && cb(res.data.data)
					break
				case 2:
					//重新登录
					login(() => {
						request(obj, method)
					})
					break
				default:
					if (failCb) {
						return failCb(res.data)
					}
					// 后台返回内容末尾含关键字history，则前台点击确定返回上一页或是首页
					let keyword = "back";
					if (!res.data.msg) return
					wx.showModal({
						title: '提示',
						content: res.data.msg.split(keyword)[0],
						showCancel: false,
						success: function(e) {
							if (e.confirm && res.data.msg.indexOf(keyword) > -1) {
								let pages = getCurrentPages();
								if (pages.length > 1) {
									wx.navigateBack({})
								} else {
									wx.reLaunch({
										url: '/pages/tabBar/home/index',
									})
								}
							}
						}
					})
			}
		},
		fail(res) {
			console.log('fail', res)
		},
		complete(res) {

		}
	})
}

/**
 * HTTP基本请求
 */
let $Get = (obj) => {
	request(obj, 'GET')
}
let $Post = (obj) => {
	request(obj, 'POST')
}

/**
 * 登录
 */
let login = (cb) => {
	wx.login({
		success(res) {
			if (res.code) {
				$Post({
					api: "login",
					params: {
						code: res.code
					},
					cb: (res) => {
						if (res.token) {
							wx.setStorageSync('token', res.token)
						}
					}
				})
			}
			cb && cb()
		},
		fail(res) {
			console.log('login fail', res)
		},
		complete(res) {

		}
	})
}

export {
	server,
	$Get,
	$Post,
	login
}