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@@ -1,7 +1,7 @@
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import fetch from 'dva/fetch';
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import { notification } from 'antd';
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import router from 'umi/router';
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-
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+import hash from 'hash.js';
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const codeMessage = {
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200: '服务器成功返回请求的数据。',
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201: '新建或修改数据成功。',
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@@ -41,7 +41,18 @@ function checkStatus(response) {
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* @param {object} [options] The options we want to pass to "fetch"
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* @return {object} An object containing either "data" or "err"
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*/
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-export default function request(url, options) {
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+export default function request(url, options = {}) {
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+ console.log(url);
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+ /**
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+ * Produce fingerprints based on url and parameters
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+ * Maybe url has the same parameters
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+ */
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+ const fingerprint = url + options.body ? JSON.stringify(options.body) : '';
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+ const hashcode = hash
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+ .sha256()
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+ .update(fingerprint)
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+ .digest('hex');
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+
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const defaultOptions = {
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credentials: 'include',
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};
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@@ -66,10 +77,42 @@ export default function request(url, options) {
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};
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}
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}
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-
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+ let cached = localStorage.getItem(hashcode);
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+ let whenCached = localStorage.getItem(hashcode + ':timestamp');
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+ const expirys = options.expirys || 60;
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+ if (cached !== null && whenCached !== null && expirys !== false) {
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+ let age = (Date.now() - whenCached) / 1000;
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+ if (age < expirys) {
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+ let response = new Response(new Blob([cached]));
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+ return response.json();
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+ } else {
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+ localStorage.removeItem(hashcode);
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+ localStorage.removeItem(hashcode + ':timestamp');
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+ }
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+ }
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return fetch(url, newOptions)
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.then(checkStatus)
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.then(response => {
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+ /**
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+ * Clone a response data and store it in localStorage
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+ * Does not support data other than json, Cache only json
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+ */
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+ let contentType = response.headers.get('Content-Type');
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+ if (contentType && contentType.match(/application\/json/i)) {
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+ // All data is saved as text
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+ response
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+ .clone()
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+ .text()
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+ .then(content => {
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+ localStorage.setItem(hashcode, content);
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+ localStorage.setItem(hashcode + ':timestamp', Date.now());
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+ });
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+ }
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+ return response;
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+ })
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+ .then(response => {
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+ // DELETE and 204 do not return data by default
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+ // using .json will report an error.
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if (newOptions.method === 'DELETE' || response.status === 204) {
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return response.text();
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}
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@@ -78,12 +121,14 @@ export default function request(url, options) {
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.catch(e => {
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const status = e.name;
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if (status === 401) {
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+ // @HACK
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/* eslint-disable no-underscore-dangle */
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window.g_app._store.dispatch({
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type: 'login/logout',
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});
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return;
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}
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+ // environment should not be used
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if (status === 403) {
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router.push('/exception/403');
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return;
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陈帅