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https://issues.apache.org/jira/browse/NIFI-353?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14372344#comment-14372344
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Matt Gilman commented on NIFI-353:
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I've added labels to the filename and content type. I agree that just showing
the filename is only obvious when it's something meaningful. Showing the
content type seems to be appropriate so the user can see what was detected.
These are the only pieces of information that are available currently. The
input to the endpoint that retrieves the content is a provenance event id and
whether we want the input or the output to that event. I do not know what the
flowfile uuid is. I only know the filename as its populated in the
Content-Disposition (attachment) response header. Then the content type is
detected. I could add additional details in NiFi specific response headers if
desired.
> Create a Data Viewer
> --------------------
>
> Key: NIFI-353
> URL: https://issues.apache.org/jira/browse/NIFI-353
> Project: Apache NiFi
> Issue Type: Improvement
> Components: Core UI
> Reporter: Matt Gilman
> Assignee: Matt Gilman
> Attachments: flow_that_shows_issues_with_viewer.xml
>
>
> For use in property:
> {code}nifi.content.viewer.url{code}
> The content viewer will be extensible in that the supported mime types will
> be discovered at runtime. We will be taking an approach similar to Java SPI.
> During startup all war files will be inspected looking for a
> META-INF/nifi-data-viewer file. This file will contain the mime types that it
> can render (1 per line). Duplicate viewers will be logged and either the
> first or the last will be utilized.
> Currently, the content viewer is applicable for viewing archived data through
> the provenance UI. This will likely be expanded to integrate with other parts
> of the application where applicable (viewing content in queues, etc). When
> viewing the data, the content viewer controller will get the data stream and
> detect its type (Apache Tika, known mime type, file extension, etc). Will
> likely need to add support for decompressing/unpacking. Once the underlying
> type is known and is supported, the content viewer controller will generate
> the webpage and defer to the discovered web application to generate the mark
> up for the data (via RequestDispatcher.include). This means that the
> discovered web application does not need to generate any boilerplate HTML and
> all types of content will be viewed in a similar UI.
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