Hi, I think that would be a perfect use case for NIFI-7572 [1] once there is a solution for it.
[1] https://issues.apache.org/jira/browse/NIFI-7572 Le ven. 26 juin 2020 à 08:20, Myklebust, Bjørn Magnar < [email protected]> a écrit : > Ok, I see. > > Thanks, Andy. > > > > Bjørn > > > > *Fra:* Andy LoPresto <[email protected]> > *Sendt:* torsdag 25. juni 2020 19:20 > *Til:* [email protected] > *Emne:* Re: Replacing a base64-encoded field in a JSON-document with its > decoded/converted value > > > > Hi Bjørn, > > > > No, XML to JSON conversion is not an Expression Language feature. You’ll > need to either get this data into a flowfile as the complete content to > perform the conversion with existing built-in tools, or add that step to > your Groovy script. > > > > With that additional requirement, I think using the Groovy script to > perform those steps in tandem is probably the most performant and logical > approach here. > > > > > > Andy LoPresto > [email protected] > *[email protected] <[email protected]>* > He/Him > > PGP Fingerprint: 70EC B3E5 98A6 5A3F D3C4 BACE 3C6E F65B 2F7D EF69 > > > > On Jun 24, 2020, at 11:25 PM, Myklebust, Bjørn Magnar < > [email protected]> wrote: > > > > Thanks Andy. > > The XML-content is around 5 kB-ish. But I also need to convert the XML to > JSON before replacing it back into the original JSON-file. Can this be > done with e.g a ConvertAttribute before the ReplaceText? > > > > Thanks, > > Bjørn > > > > > > > > *Fra:* Andy LoPresto <[email protected]> > *Sendt:* onsdag 24. juni 2020 17:24 > *Til:* [email protected] > *Emne:* Re: Replacing a base64-encoded field in a JSON-document with its > decoded/converted value > > > > Hello Bjørn, > > > > If the size of the encoded XML document is small (under ~1 KB), you can > extract the Base64-encoded value to a flowfile attribute using > EvaluateJSONPath, perform the decoding using the base64Decode Expression > Language function [1], and then replace it into the flowfile JSON content > using ReplaceText (using some regex like "content": ".*" -> “content": > ”${decodedXML}” where decodedXML is the name of the attribute you are > using). > > > > If the XML content could be very large, this will negatively affect your > performance, as attributes are stored directly in memory and handling large > amounts of data will impact the heap. In this case, I would recommend > writing a Groovy script in ExecuteScript processor to leverage Groovy’s > very friendly JSON handling and extract the value, Base64 decode it, and > replace it in a couple lines. > > > > Hope this helps. > > > > > > [1] > https://nifi.apache.org/docs/nifi-docs/html/expression-language-guide.html#base64decode > > > > Andy LoPresto > [email protected] > *[email protected] <[email protected]>* > He/Him > > PGP Fingerprint: 70EC B3E5 98A6 5A3F D3C4 BACE 3C6E F65B 2F7D EF69 > > > > > On Jun 24, 2020, at 4:24 AM, Myklebust, Bjørn Magnar < > [email protected]> wrote: > > > > > > Hi. > > I have a set of Json-files which contain a base64-coded field (Jsonpath to > this field is $.data.content), and this field contains a XML-document. > Decoding the field works as expected, so does the conversion from xml to > json, and I'm able to write the content from this field to a file in a > bucket in S3. But what I would like to do is to be able to replace the > coded value for this field in the original file with the decoded/converted > value in stead of writing the decoded/converted value to file. And after > replacing the json-value then I can write the updated Json-file to a new S3 > bucket. > > My process look like this at the moment, and works fine for getting the > data to file, but it's missing the last part of replacing $.data.content > with the decoded/converted data. > > > > So how can I do the last part? > > > > <pastedImage.png> > > > > The EvaluedJsonPath looks like this: > > > > <EvaluateJsonPath.png> > > > > The ReplaceText looks like this: > > > > <ReplaceText.png> > > The Base64EncodeContent looks like this: > > > > <Base64Decode.png> > > and finally, the CovertRecord looks like this: > > > > <ConvertRecord.png> > > > > > > This is a testfile for that I'm working with: > > > > { > > "header": { > > "dokumentidentifikator": null, > > "dokumentidentifikatorV2": "dcff985b-c652-4085-b8f1-45a2f4b6d150", > > "revisjonsnummer": 1, > > "dokumentnavn": > "Engangsavgiftfastsettelse:55TEST661122334455:44BIL1:2017-10-20", > > "dokumenttype": "SKATTEMELDING_ENGANGSAVGIFT", > > "dokumenttilstand": "OPPRETTET", > > "gyldig": true, > > "gjelderInntektsaar": 2017, > > "gjelderPeriode": "2017_10", > > "gjelderPart": { > > "partsnummer": 5544332211, > > "identifiseringstype": "MASKINELL", > > "identifikator": null > > }, > > "opphavspart": { > > "partsnummer": 5544332211, > > "identifikator": null > > }, > > "kildereferanse": { > > "kildesystem": "ENGANGSAVGIFTFASTSETTELSE", > > "gruppe": "", > > "referanse": "aef147fb-8ce8-43ef-833b-7aa3bac1ece0", > > "tidspunkt": "2018-01-16T13:28:02.49+01:00" > > } > > }, > > "data": { > > "metadata": { > > "format": "ske:fastsetting:motorvogn:motorvognavgift:v1", > > "bytes": 4420, > > "mimeType": "application/xml", > > "sha1": "c0AowOsTdNdo6VufeSsZqTphc0Y=" > > }, > > "content": > 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> > }, > > "extension": null, > > "skjemaversjon": "v3_0" > > } > > > > > > > > > > Cheers, > > Bjørn > > > > > ------------------------------ > > Denne e-posten og eventuelle vedlegg er beregnet utelukkende for den > institusjon eller person den er rettet til og kan være belagt med > lovbestemt taushetsplikt. 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