use xml2js parseString return value

问题

xml = '<?xml version="1.0" encoding="utf-8"?><soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"><soap:Body><GetCurrentRoomStatusGraphResponse xmlns="www.example.com"><GetCurrentRoomStatusGraphResult><RoomStatusGraphItem><RoomID>3</RoomID><ChainID>1</ChainID><RoomNo>8888</RoomNo><RoomTypeID>1</RoomTypeID><RoomTypeCode>DF</RoomTypeCode><RoomTypeName>standard room</RoomTypeName><RoomRate>0.0000</RoomRate><Floor>2</Floor><FolioID>123456</FolioID><Guest><RoomStatusGuest><Name>Jon Snow</Name><Sex>1</Sex><VipTypeID>0</VipTypeID></RoomStatusGuest></Guest><Arrival>2019-03-07T13:43:00</Arrival><Depart>2019-03-08T12:00:00</Depart><IsDepart>false</IsDepart><IsTimeRoom>false</IsTimeRoom><Surreptitious>false</Surreptitious><CheckInState>CheckIn</CheckInState><ClentState>NoClean</ClentState><HouseKeepState>EnableSaleRoom</HouseKeepState><CheckRoomFlag>false</CheckRoomFlag><IsBookInRoom>false</IsBookInRoom><IsFreeRoom>false</IsFreeRoom><IsInnerRoom>true</IsInnerRoom><IsThirdOTA>false</IsThirdOTA><IsAssociationRoom>false</IsAssociationRoom><RoomRemark /><FolioInnerRemark /><FolioRemark /><AddtionalFlag><int>1</int></AddtionalFlag><IsReserve>false</IsReserve><ClearRoomType>3</ClearRoomType><ClearRoomTypeName>normal</ClearRoomTypeName><CheckOutID>0</CheckOutID><CheckOutState>None</CheckOutState><MilkMarketStatus>0</MilkMarketStatus></RoomStatusGraphItem></GetCurrentRoomStatusGraphResult></GetCurrentRoomStatusGraphResponse></soap:Body></soap:Envelope>'

var parseString = require('xml2js').parseString;
parseString(xml, function (err, result) {
    console.dir(result);   //print object user console.log (util.inspect(result, false,null)) can print all value
});

I want another function use this value, how to return the value? like this

parseString(xml, function (err, result) {
        return result
    });

回答1:

You can use the async / await pattern to do this, for example:

const parseString = require('xml2js').parseString;
const xmlInput = '<?xml version="1.0" encoding="utf-8"?><soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"><soap:Body><GetCurrentRoomStatusGraphResponse xmlns="www.example.com"><GetCurrentRoomStatusGraphResult><RoomStatusGraphItem><RoomID>3</RoomID><ChainID>1</ChainID><RoomNo>8888</RoomNo><RoomTypeID>1</RoomTypeID><RoomTypeCode>DF</RoomTypeCode><RoomTypeName>standard room</RoomTypeName><RoomRate>0.0000</RoomRate><Floor>2</Floor><FolioID>123456</FolioID><Guest><RoomStatusGuest><Name>Jon Snow</Name><Sex>1</Sex><VipTypeID>0</VipTypeID></RoomStatusGuest></Guest><Arrival>2019-03-07T13:43:00</Arrival><Depart>2019-03-08T12:00:00</Depart><IsDepart>false</IsDepart><IsTimeRoom>false</IsTimeRoom><Surreptitious>false</Surreptitious><CheckInState>CheckIn</CheckInState><ClentState>NoClean</ClentState><HouseKeepState>EnableSaleRoom</HouseKeepState><CheckRoomFlag>false</CheckRoomFlag><IsBookInRoom>false</IsBookInRoom><IsFreeRoom>false</IsFreeRoom><IsInnerRoom>true</IsInnerRoom><IsThirdOTA>false</IsThirdOTA><IsAssociationRoom>false</IsAssociationRoom><RoomRemark /><FolioInnerRemark /><FolioRemark /><AddtionalFlag><int>1</int></AddtionalFlag><IsReserve>false</IsReserve><ClearRoomType>3</ClearRoomType><ClearRoomTypeName>normal</ClearRoomTypeName><CheckOutID>0</CheckOutID><CheckOutState>None</CheckOutState><MilkMarketStatus>0</MilkMarketStatus></RoomStatusGraphItem></GetCurrentRoomStatusGraphResult></GetCurrentRoomStatusGraphResponse></soap:Body></soap:Envelope>';

function parseXml(xml) {
    return new Promise((resolve, reject) => {
        parseString(xml, (err, result) => {
            if (err) {
                reject(err);
            } else {
                resolve(result);
            }
        });
    });
}

function processResult(result) {
    console.log("processResult: result: ", result);
}

async function testXmlParse(xml) {
    try {
        let result = await parseXml(xml);
        // Now that you have the result you can do further processing, write to file etc.
        processResult(result);
    } catch (err) {
        console.error("parseXml failed: ", err);
    }
}

testXmlParse(xmlInput);

来源：https://stackoverflow.com/questions/55037332/use-xml2js-parsestring-return-value