long
2024-06-24 38f948d5bef331d7dc4555039e16f00f639218a5
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/**
 * Http 请求
 * * 小程序请使用增强编译
 *
 * 调用例子
 * Req.http.post({
 *     url: '',
 *     data: {},
 * })
 */
 
import Axios from '../libs/axios'
 
/* json转formdata(序列化),仅支持一级字面量和字面量数组 */
function jsonToFormData(json) {
  var arr = []
  var e = encodeURIComponent
  for (var key in json) {
    var item = json[key]
    var res
    if (item instanceof Array) {
      res = []
      item.map(function(o) {
        res.push(e(key) + '=' + e(o))
      })
      res = res.join('&')
    } else {
      res = e(key) + '=' + e(item)
    }
    arr.push(res)
  }
  return arr.join('&')
}
 
/**
 * Http 类
 * @param http_option {Object}
 * -@key {string}   baseUrl --请求链接前置
 * -@key {object}   getChangeRequestParameter --get请求参数
 * -@key {object}   postChangeRequestParameter --post请求参数
 * -@key {function} beforeRequest --请求前处理
 * -@key {function} beforeFlow --请求前流程
 * -@key {function} successChangeData --请求完成后,处理数据
 * -@key {function} httpEventCode --请求完成后,处理委托
 * -@key {function} afterFlow --请求完成后流程
 * -@key {function} afterRequest --请求后事件
 * -@key {function} afterMultiRequests --同时多次请求完成之后 
 */
function Http (http_option) {
    // 请求配置数组,标记是否批量请求
    var requestArr = []
    // 请求总线
    function Request (request_option) {
        // 默认 data 为对象
        request_option.data = request_option.data || {}
        // 请求配置加入数组
        requestArr.push(request_option)
 
        // 触发请求前事件
        if (http_option.beforeRequest) {
            http_option.beforeRequest({http_option, request_option})
        }
        // 使用 promise 完成请求
        return new Promise ((resolve, reject) => {
            // vue-cli中改用mockjs
            // mock假数据流程
            // 20210121 - 暂停使用mockjs
            if (http_option.mockFlow && http_option.ismock) {
                resolve(http_option.mockFlow({http_option, Request, request_option}))
                return 
            }
            // 请求前自定义流程
            if (http_option.beforeFlow && !request_option.skip_before_flow) {
                // skip 为 true 时,不仅如此此流程
                requestArr.splice(0, 1)
                resolve(http_option.beforeFlow({http_option, Request, request_option}))
                return
            }
            var url = request_option.url
            if (!url) {
                throw new Error('url不能为空')
            }
            // 不增加domain设定
            if (request_option.udData && request_option.udData.nodomain) {
                if (!/^https?:\/\//.test(url)) {
                    // 使用本项目域名
                    if (/^\//.test(url)) {
                        url = location.origin + url
                    } else {
                        // 修复访问本地json问题
                        url = location.origin + location.pathname.replace('index.html', '') + url
                    }
                }
            } else if (!/^https?:\/\//.test(url)) {
                url = http_option.baseUrl + url
            }
            // 定义请求配置
            var request_config = {
                method: request_option.method,
                url,
                data: request_option.data,
                header: request_option.header || {'Content-type':'application/x-www-form-urlencoded'},
                // 请求成功
                success (res) {
                    // 请求成功后,处理数据
                    if (http_option.successChangeData) {
                        res = http_option.successChangeData(res)
                    }
                    // 触发 code 委托事件
                    if (http_option.httpEventCode && http_option.httpEventCode['code'+res.status]) {
                        http_option.httpEventCode['code'+res.status](res);
                    }
                    // 请求后自定义流程
                    if (http_option.afterFlow) {
                        resolve(http_option.afterFlow({
                            res,
                            request_config,
                            request_option,
                            http_option,
                            Request,
                        }))
                    }
                    // 触发请求后事件
                    if (http_option.afterRequest) {
                        http_option.afterRequest({http_option, res})
                    }
 
                    if (request_option.udData) {
                        // 返回全部数据
                        if (request_option.udData.fullData === true) {
                            resolve(res)
                        }
                    }
                    resolve(res.data)
                },
 
                // 请求失败
                fail (err) {
                    // console.error(err)
                    var code = err.response && err.response.status
                    // 触发 code 委托事件
                    if (code && http_option.httpEventCode && http_option.httpEventCode['code'+code]) {
                        http_option.httpEventCode['code'+code](err, url)
                    }
                    // alert('请求失败,错误代号:'+code)
                    reject(err)
                },
 
                // 无论成功或者失败都会执行
                complete () {
                    requestArr.splice(0, 1)
                    if (requestArr.length === 0) {
                        // http_option.debug && console.log('触发 afterMultiRequests', request_config)
                        // 批量请求全部完成,触发事件
                        if (http_option.afterMultiRequests) {
                            http_option.afterMultiRequests(request_option)
                        }
                    }
                }
            };
 
            // get 方法时,去掉 data
            if (request_option.method === 'GET') {
                delete request_config.data
            }
 
            // 打印请求信息
            http_option.debug && console.log('请求', request_config)
            // 处理header和data的关系
            if (request_config.header['Content-type'] == 'application/x-www-form-urlencoded') {
                request_config.data = request_config.data ? jsonToFormData(request_config.data) : {}
            }
 
            // 开始请求
            // wx.request(request_config)
            Axios({
                method: request_config.method,
                headers: request_config.header,
                url: request_config.url,
                data: request_config.data
            }).then((res) => {
                // http_option.debug && console.log('成功回调', res)
                request_config.success(res)
                request_config.complete(res)
            }).catch((res) => {
                // http_option.debug && console.log('失败回调', res)
                request_config.fail(res)
                request_config.complete(res)
            })
        })
    }
 
    var obj = {
        // get请求
        // @param get_option {Object} 请求配置
        // -@key url {String} 请求路径
        // -@key params {Object} 请求参数
        // -@key udData {Object} 自定义扩展字段
 
        // @return {Promise}
        get (get_option) {
            // 请求前,统一处理请求参数
            if (http_option.getChangeRequestOption) {
                get_option = http_option.getChangeRequestOption(get_option)
            }
 
            // params对象序列化到url中
            if (get_option.params) {
                let arr = []
                for (let i in get_option.params) {
                    if (get_option.params.hasOwnProperty(i)) {
                        arr.push(encodeURIComponent(i) + '=' + encodeURIComponent(get_option.params[i]))
                    }
                }
                if (/\?/.test(get_option.url)) {
                    get_option.url += '&' + arr.join('&')
                } else {
                    get_option.url += '?' + arr.join('&')
                }
                
            }
 
            // 使用promise完成Request调用
            return new Promise ((resolve, reject) => {
                Request({
                    method: 'GET',
                    url: get_option.url,
                    udData: get_option.udData,
                    header: get_option.header,
                    mockData: get_option.mockData,
                }).then((data) => {
                    resolve(data)
                }).catch((res)=>{
                    // ↓↓↓↓↓↓↓↓↓↓ 临时处理失败
                    // var junPage = getApp().getCurPage()
                    // junPage = junPage && junPage.selectComponent('#junPage')
                    // if (junPage && junPage.fail) {
                    //     console.log('设置fail')
                    //     junPage.fail()
                    // }
                    // ↑↑↑↑↑↑↑↑↑↑ 临时处理失败
                    reject(res)
                })
            })
        },
 
        // post请求
        // @param post_option {Object} 请求配置
        // -@key url {String} 请求路径
        // -@key data {Object} 请求参数
        // -@key udData {Object} 自定义扩展字段
 
        // @return {Promise}
        post (post_option) {
            // 请求前,统一处理请求参数
            if (http_option.postChangeRequestOption) {
                post_option = http_option.postChangeRequestOption(post_option)
            }
            // 使用promise完成Request调用
            return new Promise ((resolve, reject) => {
                Request({
                    method: 'POST',
                    url: post_option.url,
                    data: post_option.data,
                    udData: post_option.udData,
                    header: post_option.header,
                    mockData: post_option.mockData,
                }).then((data) => {
                    resolve(data)
                }).catch((res)=>{
                    // ↓↓↓↓↓↓↓↓↓↓ 临时处理失败
                    // var junPage = getApp().getCurPage()
                    // junPage = junPage && junPage.selectComponent('#junPage')
                    // if (junPage && junPage.fail) {
                    //     console.log('设置fail')
                    //     junPage.fail()
                    // }
                    // ↑↑↑↑↑↑↑↑↑↑ 临时处理失败
                    reject(res)
                })
            })
        }
    }
    obj.getFN = obj.get
    obj.postFN = obj.post
    return obj;
}
 
export default Http