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https://issues.apache.org/jira/browse/TIKA-4856?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18111344#comment-18111344
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Hudson commented on TIKA-4856:
------------------------------
UNSTABLE: Integrated in Jenkins build Tika ยป tika-main-jdk17 #1612 (See
[https://ci-builds.apache.org/job/Tika/job/tika-main-jdk17/1612/])
TIKA-4856 presets (#3118) (github:
[https://github.com/apache/tika/commit/bfe1a42704b177f5b8a574fc452b6f7b97a537e7])
* (add)
tika-server/tika-server-core/src/test/java/org/apache/tika/server/core/resource/TikaResourcePresetTest.java
* (add)
tika-pipes/tika-pipes-core/src/test/java/org/apache/tika/pipes/core/server/PresetMergeTest.java
* (add)
tika-server/tika-server-core/src/test/java/org/apache/tika/server/core/PresetEndpointsTest.java
* (edit)
tika-server/tika-server-core/src/main/java/org/apache/tika/server/core/resource/RecursiveMetadataResource.java
* (add)
tika-serialization/src/main/java/org/apache/tika/config/loader/PresetRegistry.java
* (edit)
tika-server/tika-server-core/src/main/java/org/apache/tika/server/core/resource/UnpackerResource.java
* (edit)
tika-pipes/tika-pipes-core/src/main/java/org/apache/tika/pipes/core/serialization/FetchEmitTupleSerializer.java
* (edit)
tika-server/tika-server-core/src/main/java/org/apache/tika/server/core/resource/TikaResource.java
* (edit)
tika-pipes/tika-pipes-api/src/main/java/org/apache/tika/pipes/api/PipesResult.java
* (edit)
tika-pipes/tika-pipes-core/src/main/java/org/apache/tika/pipes/core/serialization/PipesRequest.java
* (add)
tika-server/tika-server-core/src/main/java/org/apache/tika/server/core/resource/PresetSelection.java
* (edit) docs/modules/ROOT/pages/pipes/plugins/json.adoc
* (edit)
tika-pipes/tika-pipes-core/src/main/java/org/apache/tika/pipes/core/serialization/FetchEmitTupleDeserializer.java
* (edit)
tika-server/tika-server-core/src/main/java/org/apache/tika/server/core/resource/PipesParsingHelper.java
* (edit) CHANGES.txt
* (add)
tika-serialization/src/test/java/org/apache/tika/config/loader/PresetRegistryTest.java
* (edit)
tika-server/tika-server-core/src/test/java/org/apache/tika/server/core/CXFTestBase.java
* (edit)
tika-pipes/tika-pipes-core/src/main/java/org/apache/tika/pipes/core/server/SharedServerResources.java
* (edit) docs/modules/ROOT/pages/using-tika/server/index.adoc
* (add)
tika-pipes/tika-pipes-core/src/main/java/org/apache/tika/pipes/core/server/PresetNotFoundException.java
* (edit)
tika-pipes/tika-pipes-core/src/main/java/org/apache/tika/pipes/core/server/PipesServer.java
* (edit) docs/modules/ROOT/pages/pipes/configuration.adoc
* (edit)
tika-serialization/src/main/java/org/apache/tika/config/loader/TikaJsonConfig.java
* (edit)
tika-pipes/tika-pipes-core/src/main/java/org/apache/tika/pipes/core/server/ConnectionHandler.java
* (edit)
tika-pipes/tika-pipes-core/src/test/java/org/apache/tika/pipes/core/serialization/JsonFetchEmitTupleTest.java
* (edit)
tika-pipes/tika-pipes-api/src/main/java/org/apache/tika/pipes/api/FetchEmitTuple.java
* (add) tika-serialization/src/test/resources/test-presets/builtin-sample.json
* (add)
tika-serialization/src/test/resources/META-INF/tika/preset-catalog.properties
> /unpack/thumbnail: return the document thumbnail with its metadata
> ------------------------------------------------------------------
>
> Key: TIKA-4856
> URL: https://issues.apache.org/jira/browse/TIKA-4856
> Project: Tika
> Issue Type: New Feature
> Reporter: Dominik Schmidt
> Priority: Major
>
> With TIKA-4850 through TIKA-4855 every container format that carries a
> thumbnail emits it as a THUMBNAIL embedded document, the PDF parser renders
> pages as RENDERING documents, and the EMF/WMF renderer turns the vector
> thumbnails of Office documents into raster ones. Getting "the thumbnail of
> this file" out of that still takes format knowledge on the client: the
> THUMBNAIL of a Word or Excel file is an EMF/WMF whose usable form is the
> RENDERING underneath it, a PDF has no THUMBNAIL but a page RENDERING, the
> THUMBNAIL of a DOCX inside a ZIP is not the ZIP's, and with rendering enabled
> the picture of an embedded OLE object is a RENDERING too. Plus the request
> config that switches the renderers on.
> Proposal: POST /unpack/thumbnail next to /unpack and /unpack/all, multipart
> like them. It runs the usual forked parse in unpack mode with a fixed parse
> context (PDF page 1 rendered, EMF/WMF rendered) and picks, in this order: the
> raster THUMBNAIL at depth 1; the rendering of that thumbnail; the depth-1
> RENDERING of PDF page 1. The endpoint extracts what the document carries; it
> does not resize, convert or generate previews.
> The response is JSON: the /rmeta metadata object of the selected embedded
> document, and the image as base64. Thumbnails are small, so the encoding
> overhead does not matter, and the caller gets type, dimensions, origin
> (stored thumbnail or rendering, tk:rendering:rendered-by) and path in one
> round trip without unpacking a zip. 204 when the document has no thumbnail.
> {
> "metadata": {
> "Content-Type": "image/png",
> "Content-Length": "8459",
> "tiff:ImageWidth": "800",
> "tiff:ImageLength": "1131",
> "tk:embedded-resource-type": "RENDERING",
> "tk:embedded-resource-path": "/thumbnail.emf/thumbnail.png",
> "tk:embedded-depth": "2",
> "tk:rendering:rendered-by": "poi-metafile-renderer",
> "tk:resource-name": "thumbnail.png"
> },
> "image": "iVBORw0KGgoAAAANSUhEUgAA..."
> }
> To keep the selection rule short, the metafile renderer could give the
> rendering of a THUMBNAIL the THUMBNAIL type as well (its
> tk:rendering:rendered-by tells it apart), so a raster thumbnail is a
> THUMBNAIL regardless of whether the document stored it as PNG or as EMF.
> What do you think?
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