如何传递节点Express选项QS中的多个值

Question

在我的node.js api中，我试图将多个值传递到 tracking和 carrier字段中，但是我没有成功。我可以使用单个值（tracking的1个跟踪号和carrier的1个载波代码），但不能用于多个值。我觉得应该有一个循环涉及，但是也许我在说明这一点时是不正确的。任何帮助将不胜感激。

index.html

<script>
    function UserParams() {
        console.log('UserParams')
        var trackingNumber = ['123', '456'];
        var carrierCode = ['usps', 'fedex'];
        var url = '/api/tracking/retrieve/';
        $.ajax({
            type: 'GET',
            url: url,
            data: { tracking: trackingNumber, carrier: carrierCode },
            dataType: 'json',
            error: function (e) {
                console.log('Error Message: ', e.message);
            }
        });
    }
</script>

controller.js

    app.get("/api/tracking/retrieve", (req, res) => {
    var carrier = req.query.carrier;
    var tracking = req.query.tracking;
    console.log('carrier array', carrier);
    console.log('tracking array', tracking);
    var options = {
        method: "GET",
        url: 'https://api.example.com/v1/tracking',
        qs: { carrier_code: carrier, tracking_number: tracking },
        headers:
            {
                'api-key': process.env.SECRET_KEY_SE,
                'accept': 'application/json'
            }
    }
    console.log("Url: ", req.url);
    console.log("Query: ", req.query);
    res.send("ok");
    request(options, function (error, response, body) {
        if (!error && response.statusCode == 200) {
            console.log('BODY', body)
            var trackingData = JSON.parse(body)
            table = 'tracking_table';
            col = [
                'user_id',
                'tracking_number',
                'carrier_code',
                 ];
            val = [
                user_id,
                trackingData.tracking_number,
                options.qs.carrier_code,
                   ];
            main.create(table, col, val, function (data) {
                res.json({
                    id: data.insertId,
                    user_id: user_id,
                    tracking_number: data.tracking_number,
                    carrier_code: data.carrier_code,
              });
            })
        }
    })
})

导致终端：

carrier array [ 'usps', 'fedex' ]
tracking array [ '123', '456' ]
Url:  /api/tracking/retrieve/?tracking%5B%5D=123&tracking%5B%5D=456&carrier%5B%5D=usps&carrier%5B%5D=fedex
Query:  { tracking: [ '123', '456' ],
carrier: [ 'usps', 'fedex' ] }

编辑：编辑的问题以包括进一步的上下文。

Answer 1

取决于后端是什么，您可以尝试为此目的使用数组，例如

var tracking = ['9361289691090998780245','784644233438'];
var carrier =  ['usps','fedex'];
options = {
    method: "GET",
    url: 'https://api.example.com/v1/tracking',
    qs: { tracking_number: tracking, carrier_code: carrier },
    headers:
        {
            'api-key': process.env.SECRET_KEY_SE,
            'accept': 'application/json'
        }
}
request(options, function (error, response, body) {
    if (error) console.error("An error occurred: ", error);
    console.log("body: ", body);
});

如果Express提供此问题，则查询字符串将正确解析，例如

app.get("/api/tracking/retrieve", (req, res) => {
    console.log("Url: ", req.url);
    console.log("Query: ", req.query);
    res.send("ok");
});

这就是Express;

记录的内容

Url:  /api/tracking/retrieve?tracking_number%5B0%5D=9361289691090998780245&tracking_number%5B1%5D=784644233438&carrier_code%5B0%5D=usps&carrier_code%5B1%5D=fedex
Query:  { tracking_number: [ '9361289691090998780245', '784644233438' ], carrier_code: [ 'usps', 'fedex' ] }

当然取决于API提供商，因此可能值得一看是否有有关如何格式化参数的文档。

Answer 2

尝试更改字符串跟踪＆amp;运营商 Array 带有功能 split

app.get('/api/tracking/retrieve', function (req, res) {
  options = {
      method: "GET",
      url: 'https://api.example.com/v1/tracking',
      qs: { tracking_number: tracking.split(','), carrier_code: carrier.split(',') },
      headers:
          {
              'api-key': process.env.SECRET_KEY_SE,
              'accept': 'application/json'
          }
  }
  request(options, function (error, response, body) {
 })
});