Method1:-
You can add new extract text processor before replace text processor and keep the whole content of the flowfile as attribute and use the extracted attribute in Replace Text processor to get escapeJson function.
Extract text Processor Configs:-
Add new property by clicking on + sign at top right corner
in my case i have added extract property with below regex
extract
(.*)
Now we are going to extract all the content of the flowfile and keep that content as extract attribute to the flowfile.
You need to increase the below properties sizes if you are having big content to extract
Maximum Buffer Size
1 MB
Maximum Capture Group Length
1024
Output from extract text processor:-
Replace text Configs:-
Change the configs according to the screenshot,
Search Value
(?s)(^.*$)
Replacement Value
${extract:escapeJson()}
Character Set
UTF-8
Maximum Buffer Size
1 MB //needs to change if the size of flowfile is more than 1 MB
Replacement Strategy
Always Replace
Evaluation Mode
Entire text
Now we are applying escapeJson function to the extract attribute as a replacement value.
Output:-
https 2018-03-18T23:55:36.990541Z app\/abc-pxx-p001\/abc123 12.34.56.78:12345 87.65.43.21:80 0.000 0.092 0.000 200 200 1124 364 \"GET https:\/\/mysite.nl:443\/test HTTP\/1.1\" \"abc\/1 CFN\/987 Darwin\/12.3.4\" ECDHE-RSA-AES128-GCM-SHA256 TLSv1.2 arn:aws:elasticloadbalancing:eu-west-1:012345679:targetgroup\/abc-external-abc-de\/abc123def456 \"Root=1-5a-d2a18df071c\" \"mysite.nl\" \"session-reused\" 0
(or)
Method2:-
By using two Replace text processor in series we can have same expected result instead of using extract text processor.
Replace / with \/:-
Search Value
/
Replacement Value
\/
Character Set
UTF-8
Maximum Buffer Size
1 MB
Replacement Strategy
Literal Replace
Evaluation Mode
Entire text
in this processor we are searching for / literal and replacing / with \/.
feed the success relation from this replacetext processor to the next replace text processor
Replace text processor 2 for replace " with \":-
Search Value
"
Replacement Value
\"
Character Set
UTF-8
Maximum Buffer Size
1 MB
Replacement Strategy
Literal Replace
Evaluation Mode
Entire text
In the next replace text processor we are searching for " and replacing " with \" by using literal replace as Replacement strategy.
Output flowfile content from second replace text processor will be same as our method 1.
https 2018-03-18T23:55:36.990541Z app\/abc-pxx-p001\/abc123 12.34.56.78:12345 87.65.43.21:80 0.000 0.092 0.000 200 200 1124 364 \"GET https:\/\/mysite.nl:443\/test HTTP\/1.1\" \"abc\/1 CFN\/987 Darwin\/12.3.4\" ECDHE-RSA-AES128-GCM-SHA256 TLSv1.2 arn:aws:elasticloadbalancing:eu-west-1:012345679:targetgroup\/abc-external-abc-de\/abc123def456 \"Root=1-5a-d2a18df071c\" \"mysite.nl\" \"session-reused\" 0
Both ways we are getting same expected result, choose the way which can better fit for your case.
Let us know if you are having any issues..!!
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