如何正确使用 JSON.parse()?JSON 结果无效

Question

当我使用JSON.parse(myJSONString(时，结果不是有效的JSON文件。我在一个nodejs环境中。任何想法我可以在我的代码中修复什么？ 我用户XML2JS将XML Api调用转换为JS。

我已经打印了结果，并且已经深入研究了 JSON.parse，但没有找到更多信息......

exports.getStations = functions.https.onCall(async (data) => {
let stations
await axios.get(encodeURI(`XMLAPi`))
.then(async (response) => {
parseString(response.data, (err, result) => {
stations = JSON.stringify(result)
console.log(stations) //First console.log
}) 
})
.catch((error) => {
console.log(error)
})

console.log(JSON.parse(stations)) //Second console.log
return JSON.parse(stations)
})

第一个控制台的结果.log(有效的 JSON 但字符串(：

{"itdRequest":{"$":{"xsi:noNamespaceSchemaLocation":"itd.xsd","language":"DE","sessionID":"EfaOpenServiceT_2882840828","client":"axios/0.19.0","serverID":"EfaOpenServiceT_","clientIP":"127.0.0.1","version":"10.3.5.46","virtDir":"static02","xmlns:xsi":"http://www.w3.org/2001/XMLSchema-instance"},"itdStopFinderRequest":{"$":{"requestID":"1"},"itdOdv":{"$":{"type":"any","usage":"sf","anyObjFilter":"42"},"itdOdvPlace":{"$":{"state":"empty"},"odvPlaceElem":""},"itdOdvName":{"$":{"state":"list"},"itdMessage":{"$":{"type":"error","module":"BROKER","code":"-8011"}},"odvNameElem":[{"_":"Mettmann, Stadtwald S","$":{"value":"0:1","selected":"1","listIndex":"0","streetName":"","omc":"5158024","placeID":"5","x":"6987248.99348","y":"51250980.94198","mapName":"WGS84","id":"20019083","anyType":"stop","anyTypeSort":"2","nameKey":"","locality":"Mettmann","postCode":"","objectName":"Stadtwald S","buildingName":"","buildingNumber":"","matchQuality":"235","stateless":"20019083"}},{"_":"Mettmann, ME-Zentrum S","$":{"value":"1:2","selected":"0","listIndex":"1","streetName":"","omc":"5158024","placeID":"5","x":"6979002.45917","y":"51249372.83702","mapName":"WGS84","id":"20019020","anyType":"stop","anyTypeSort":"2","nameKey":"","locality":"Mettmann","postCode":"","objectName":"ME-Zentrum S","buildingName":"","buildingNumber":"","matchQuality":"234","stateless":"20019020"}},{"_":"Mettmann, Neanderthal S","$":{"value":"2:3","selected":"0","listIndex":"2","streetName":"","omc":"5158024","placeID":"5","x":"6953346.57466","y":"51227837.93128","mapName":"WGS84","id":"20019191","anyType":"stop","anyTypeSort":"2","nameKey":"","locality":"Mettmann","postCode":"","objectName":"Neanderthal S","buildingName":"","buildingNumber":"","matchQuality":"234","stateless":"20019191"}}],"odvNameInput":"mettmann"},"genAttrList":{"genAttrElem":[{"name":"anyObjFilter","value":"STOP"},{"name":"anyObjFilter","value":"ADDRESS"},{"name":"anyObjFilter","value":"POI"}]}},"itdDateTime":{"$":{"ttpFrom":"20190601","ttpTo":"20191231"},"itdDate":{"$":{"day":"10","month":"8","year":"2019","weekday":"7"}},"itdTime":{"$":{"hour":"16","minute":"4"}}}}}}

第二个控制台的结果.log(解析后 JSON 无效(：

Object {
"data": Object {
"itdRequest": Object {
"$": Object {
"client": "axios/0.19.0",
"clientIP": "127.0.0.1",
"language": "DE",
"serverID": "EfaOpenServiceT_",
"sessionID": "EfaOpenServiceT_2882840828",
"version": "10.3.5.46",
"virtDir": "static02",
"xmlns:xsi": "http://www.w3.org/2001/XMLSchema-instance",
"xsi:noNamespaceSchemaLocation": "itd.xsd",
},
"itdStopFinderRequest": Object {
"$": Object {
"requestID": "1",
},
"itdDateTime": Object {
"$": Object {
"ttpFrom": "20190601",
"ttpTo": "20191231",
},
"itdDate": Object {
"$": Object {
"day": "10",
"month": "8",
"weekday": "7",
"year": "2019",
},
},
"itdTime": Object {
"$": Object {
"hour": "16",
"minute": "4",
},
},
},
"itdOdv": Object {
"$": Object {
"anyObjFilter": "42",
"type": "any",
"usage": "sf",
},
"genAttrList": Object {
"genAttrElem": Array [
Object {
"name": "anyObjFilter",
"value": "STOP",
},
Object {
"name": "anyObjFilter",
"value": "ADDRESS",
},
Object {
"name": "anyObjFilter",
"value": "POI",
},
],
},
"itdOdvName": Object {
"$": Object {
"state": "list",
},
"itdMessage": Object {
"$": Object {
"code": "-8011",
"module": "BROKER",
"type": "error",
},
},
"odvNameElem": Array [
Object {
"$": Object {
"anyType": "stop",
"anyTypeSort": "2",
"buildingName": "",
"buildingNumber": "",
"id": "20019083",
"listIndex": "0",
"locality": "Mettmann",
"mapName": "WGS84",
"matchQuality": "235",
"nameKey": "",
"objectName": "Stadtwald S",
"omc": "5158024",
"placeID": "5",
"postCode": "",
"selected": "1",
"stateless": "20019083",
"streetName": "",
"value": "0:1",
"x": "6987248.99348",
"y": "51250980.94198",
},
"_": "Mettmann, Stadtwald S",
},
Object {
"$": Object {
"anyType": "stop",
"anyTypeSort": "2",
"buildingName": "",
"buildingNumber": "",
"id": "20019020",
"listIndex": "1",
"locality": "Mettmann",
"mapName": "WGS84",
"matchQuality": "234",
"nameKey": "",
"objectName": "ME-Zentrum S",
"omc": "5158024",
"placeID": "5",
"postCode": "",
"selected": "0",
"stateless": "20019020",
"streetName": "",
"value": "1:2",
"x": "6979002.45917",
"y": "51249372.83702",
},
"_": "Mettmann, ME-Zentrum S",
},
Object {
"$": Object {
"anyType": "stop",
"anyTypeSort": "2",
"buildingName": "",
"buildingNumber": "",
"id": "20019191",
"listIndex": "2",
"locality": "Mettmann",
"mapName": "WGS84",
"matchQuality": "234",
"nameKey": "",
"objectName": "Neanderthal S",
"omc": "5158024",
"placeID": "5",
"postCode": "",
"selected": "0",
"stateless": "20019191",
"streetName": "",
"value": "2:3",
"x": "6953346.57466",
"y": "51227837.93128",
},
"_": "Mettmann, Neanderthal S",
},
],
"odvNameInput": "mettmann",
},
"itdOdvPlace": Object {
"$": Object {
"state": "empty",
},
"odvPlaceElem": "",
},
},
},
},
},
}

Answer 1

您已经将字符串转换为字符串作为parsestring函数。但它也正在转换为JSON.stringify().

您可以尝试检查此值

let stations = await axios.get(encodeURI(`XMLAPi`));
console.log(JSON.stringify(stations.data)) // What is value??