提问者:小点点

使用请求模块时获取半个JSON


我正在使用node js express服务器中的request npm模块向Payu服务器发送requet以验证支付。下面是代码

var reqpost = require('request'); //required for verify payment
var key = 'tkhyu';
var vhash = 'eff1fc9fe6b6f5184f407c122a4a0e796ef8085acf960ed67a28679884b5ddcf0fde9f776392c2fca617ce180d432cfa1a7e5ad849ecd2d1f4e029ee70e31a89'
var txnid = 'tx1234'
var command = 'verify_payment'
var options = {
  method: 'POST',
  //uri: 'https://test.payu.in/merchant/postservice.php?form=2',
  uri : 'https://info.payu.in/merchant/postservice.php?form=2',//live url
  form: {
    key: key,
    hash: vhash,
    var1: txnid,
    command: command
  },
  headers: {
     'Content-Type': 'application/json'// Is set automatically
  }
};
reqpost(options).on('response', function (resp) {
  console.log('STATUS:'+resp.statusCode);
  resp.setEncoding('utf8');
  resp.on('data', function (chunk) {
    console.log('chunk',chunk);
    vdata = JSON.parse(chunk);
    console.log('vdata',vdata);
  });
})
.on('error', function (err) {
  console.log(err);
  res.send(JSON.stringify(err));
});

下面是我在console.log中获得的reespone

chunk {"status":1,"msg":"1 out of 1 Transactions Fetched Successfully","transaction_details":{"FLRC2349909348951":{"mihpayid":"10973572053","request_id":null,"bank_ref_num":null,"amt":"1500.00","transaction_amount":"1500.00","txnid":"FLRC2349909348951","additional_charges":"0.00","productinfo":"Wall Wrap","firstname":"Rahul","bankcode":null,"udf1":null,"udf3":null,"udf4":null,"udf5":null,"field2":null,"field9":"Cancelled by user","error_code":"E1605","addedon":"2020-08-26 1
undefined:1{"status":1,"msg":"1 out of 1 Transactions Fetched Successfully","transaction_details":
{"FLRC2349909348951:
{"mihpayid":"10973572053","request_id":null,"bank_ref_num":null,"amt":"1500.00","transaction_amount":"1500.00","txnid":"FLRC2349909348951","additional_charges":"0.00","productinfo":"Wall Wrap","firstname":"Rahul","bankcode":null,"udf1":null,"udf3":null,"udf4":null,"udf5":null,"field2":null,"field9":"Cancelled by user","error_code":"E1605","addedon":"2020-08-26 1

我有错误

SyntaxError: Unexpected end of JSON input
at JSON.parse (<anonymous>)
at IncomingMessage.<anonymous> (D:\LMS\lms_server\routes\eapplication_routes\user_api\frm_fee_lrcapi.js:174:22)
at IncomingMessage.emit (events.js:203:15)
at IncomingMessage.Readable.read (_stream_readable.js:491:10)
at flow (_stream_readable.js:957:34)
at resume_ (_stream_readable.js:938:3)
at process._tickCallback (internal/process/next_tick.js:63:19)

如果我只打印块,那么块将打印两次

chunk {"status":1,"msg":"1 out of 1 Transactions Fetched Successfully","transaction_details"
{"FLRC2349909348951":{"mihpayid":"10973572053","request_id":null,"bank_ref_num":null,"amt":"1500.00","transaction_amount":"1500.00","txnid":"FLRC2349909348951","additional_charges":"0.00","productinfo":"Wall Wrap","firstname":"Rahul","bankcode":null,"udf1":null,"udf3":null,"udf4":null,"udf5":null,"field2":null,"field9":"Cancelled by user","error_code":"E1605","addedon":"2020-08-26 1
chunk 6:21:39","payment_source":"payu","card_type":null,"error_Message":"Transaction failed due to customer pressing cancel button.","net_amount_debit":"0.00","disc":"0.00","mode":"-","PG_TYPE":"","card_no":"","udf2":null,"status":"failure","unmappedstatus":"userCancelled","Merchant_UTR":null,"Settled_At":null}}}

不知道我在哪里走错了

编辑:我编辑了我的代码,如下所示

reqpost(options).on('response', function (resp) {
  console.log('STATUS:'+resp.statusCode);
  resp.setEncoding('utf8');
  var body = [];
  resp.on('data', function (chunk) {
    //console.log('chunk',chunk);
    body.push(chunk);
  }).on('end',()=>{
    // on end of data, perform necessary action
    console.log('body 1',body);
  body = Buffer.concat(body).toString();
  console.log('body',body);
  })
})
.on('error', function (err) {
  console.log(err);
  res.send(JSON.stringify(err));
});

最后,当我console.log body时,我得到以下数据

body 1 [ '{"status":1,"msg":"1 out of 1 Transactions Fetched Successfully","transaction_details":{"FLRC2349909348951":{"mihpayid":"10973572053","request_id":null,"bank_ref_num":null,"amt":"1500.00","transaction_amount":"1500.00","txnid":"FLRC2349909348951","additional_charges":"0.00","productinfo":"Wall Wrap","firstname":"Rahul","bankcode":null,"udf1":null,"udf3":null,"udf4":null,"udf5":null,"field2":null,"field9":"Cancelled by user","error_code":"E1605","addedon":"2020-08-26 1',
'6:21:39","payment_source":"payu","card_type":null,"error_Message":"Transaction failed due to customer pressing cancel button.","net_amount_debit":"0.00","disc":"0.00","mode":"-","PG_TYPE":"","card_no":"","udf2":null,"status":"failure","unmappedstatus":"userCancelled","Merchant_UTR":null,"Settled_At":null}}}' ]

addedon参数被分隔为,


共1个答案

匿名用户

data事件只是部分数据。不能只解析JSON字符串的一半。

建立一个包含从data事件接收到的所有块的字符串,并在end事件中处理它,当您知道您拥有所有数据时。