exceptionfactory commented on code in PR #8011:
URL: https://github.com/apache/nifi/pull/8011#discussion_r1393209952
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nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/IdentifyMimeType.java:
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@@ -89,14 +89,17 @@
@Tags({"compression", "gzip", "bzip2", "zip", "MIME", "mime.type", "file",
"identify"})
@CapabilityDescription("Attempts to identify the MIME Type used for a
FlowFile. If the MIME Type can be identified, "
+ "an attribute with the name 'mime.type' is added with the value
being the MIME Type. If the MIME Type cannot be determined, "
- + "the value will be set to 'application/octet-stream'. In addition,
the attribute mime.extension will be set if a common file "
- + "extension for the MIME Type is known.")
+ + "the value will be set to 'application/octet-stream'. In addition,
the attribute 'mime.extension' will be set if a common file "
+ + "extension for the MIME Type is known. If the MIME Type detected is
of type text/*, attempts to identify the charset used " +
+ "and an attribute with the name 'mime.charset' is added with the value
being the charset.")
@WritesAttributes({
-@WritesAttribute(attribute = "mime.type", description = "This Processor sets
the FlowFile's mime.type attribute to the detected MIME Type. "
- + "If unable to detect the MIME Type, the attribute's value will be
set to application/octet-stream"),
-@WritesAttribute(attribute = "mime.extension", description = "This Processor
sets the FlowFile's mime.extension attribute to the file "
- + "extension associated with the detected MIME Type. "
- + "If there is no correlated extension, the attribute's value will be
empty")
+ @WritesAttribute(attribute = "mime.type", description = "This
Processor sets the FlowFile's mime.type attribute to the detected MIME Type. "
+ + "If unable to detect the MIME Type, the attribute's value
will be set to application/octet-stream"),
+ @WritesAttribute(attribute = "mime.extension", description = "This
Processor sets the FlowFile's mime.extension attribute to the file "
+ + "extension associated with the detected MIME Type. "
+ + "If there is no correlated extension, the attribute's value
will be empty"),
+ @WritesAttribute(attribute = "mime.charset", description = "This
Processor sets the FlowFile's mime.charset attribute to the detected charset. "
+ + "If unable to detect the charset or the detected MIME type
is not of type text/*, the attribute's value will be empty")
Review Comment:
Thanks for making the change to the new `mime.charset` approach. I think the
existing approach for `mime.extension` should be left unchanged to avoid
unexpected changes for existing flows. Since this is a new attribute that only
applies for text types, it seems better to set it only when it is not null.
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