Hi @awen hu
I'd use the ExtractText processor:
Evaluates one or more Regular Expressions against the content of a
FlowFile. The results of those Regular Expressions are assigned to
FlowFile Attributes. Regular Expressions are entered by adding
user-defined properties; the name of the property maps to the Attribute
Name into which the result will be placed. The first capture group, if
any found, will be placed into that attribute name.But all capture
groups, including the matching string sequence itself will also be
provided at that attribute name with an index value provided, with the
exception of a capturing group that is optional and does not match - for
example, given the attribute name "regex" and expression "abc(def)?(g)"
we would add an attribute "regex.1" with a value of "def" if the "def"
matched. If the "def" did not match, no attribute named "regex.1" would
be added but an attribute named "regex.2" with a value of "g" will be
added regardless.The value of the property must be a valid Regular
Expressions with one or more capturing groups. If the Regular
Expression matches more than once, only the first match will be used.
If any provided Regular Expression matches, the FlowFile(s) will be
routed to 'matched'. If no provided Regular Expression matches, the
FlowFile will be routed to 'unmatched' and no attributes will be applied
to the FlowFile.
https://nifi.apache.org/docs/nifi-docs/components/org.apache.nifi.processors.standard.ExtractText/in...
Hope this helps.
