实时汇率获取解决跨域以及循环Ajax请求

红太狼 2023-06-19 02:30 74阅读 0赞

前端框架 ExtJs
    
    //币种代码
    var currencys = [
        {curCode: 'USD'},
        {curCode: 'CNY'},
        {curCode: 'HKD'},
    ];
    setInterval(function () {
        for (var idx = 0, len = currencys.length; idx < len; idx++) {
            for (var itx = 0, len2 = currencys.length; itx < len2; itx++) {
                let scur = currencys[idx].curCode;
                let tcur = currencys[itx].curCode;
                if (scur == tcur) continue;
                //测试url次数有限
                let url = 'http://api.k780.com:88/?app=finance.rate&' +
                    'scur=' + scur + '&tcur=' + tcur + '&appkey=10003&sign=b59bc3ef6191eb9f747dd4e83c99f2a4'
                console.info(url);
                Ext.Ajax.request({
                    url: url,//这里是填写需要跨域访问的URL
                    cors: true,
                    useDefaultXhrHeader: false,
                    method: 'get',
                    //async: false,//可开启同步
                    headers: {
                        "Origin:": 'http://api.k780.com',//这里是填写需要跨域访问的URL Origin字段用来说明，本次请求来自哪个源
                        "Access-Control-Allow-Origin": 'http://api.k780.com',//这里是填写需要跨域访问的URL
                        "Access-Control-Allow-Credentials": true,
                        "Content-Type": 'application/json'  //文件上传的格式，
                    },
                    success: function (res, opts) {
                        var text = res.responseText;
                        //{"success":"1","result":{"status":"ALREADY","scur":"USD","tcur":"CNY","ratenm":"美元/人民币","rate":"7.0677","update":"2019-12-04 10:14:04"}}
                        console.info(text);
                    },
                });
            }
        }
    }, 60 * 60 * 1000);

参考 [EXTJS 使用Ajax跨域上传文件][EXTJS _Ajax]

[EXTJS _Ajax]: https://blog.csdn.net/qq_33571718/article/details/78017778