javascript - 从多部分/数据中解析 JSON

Question

我有一个多部分/表单数据内容类型请求，如下所示：

--AbCdeFGHijkL
Content-Disposition: form-data; name="json_standingorderType"
Content-Type: application/json; charset=UTF-8
Content-Transfer-Encoding: 8bit

{"startDate":"2020-12-31","executionRule":"preceding","frequency":"Monthly","dayOfExecution": "31"}
--AbCdeFGHijkL
Content-Disposition: form-data; name="xml_sct"
Content-Type: application/xml; charset=ISO-8859-1
Content-Transfer-Encoding: 8bit

<Document xmlns="urn:iso:std:iso:20022:tech:xsd:pain.001.001.03">
    <CstmrCdtTrfInitn>
        <GrpHdr>
            <MsgId>MSG{{endToEndIdentification}}</MsgId>
            <CreDtTm>{{CreDtTm}}</CreDtTm>
            <NbOfTxs>1</NbOfTxs>
            <CtrlSum>{{betragOk}}</CtrlSum>
            <InitgPty>
                <Nm>XS2A Tester</Nm>
            </InitgPty>
        </GrpHdr>
        <PmtInf>
            <PmtInfId>NOTPROVIDED</PmtInfId>
            <PmtMtd>TRF</PmtMtd>
            <NbOfTxs>1</NbOfTxs>
            <CtrlSum>{{betragOk}}</CtrlSum>
            <ReqdExctnDt>1999-01-01</ReqdExctnDt>
            <Dbtr>
                <Nm>XS2A Tester</Nm>
            </Dbtr>
            <DbtrAcct>
                <Id>
                    <IBAN>{{debtorAccountIBAN}}</IBAN>
                </Id>
            ...

我正在尝试从顶部的 json 中获取频率，我该如何做到这一点？我正在使用 NodeJS。

标签： javascript