[
https://issues.apache.org/jira/browse/TIKA-4856?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18116115#comment-18116115
]
Hudson commented on TIKA-4856:
------------------------------
SUCCESS: Integrated in Jenkins build Tika ยป tika-main-jdk17 #1645 (See
[https://ci-builds.apache.org/job/Tika/job/tika-main-jdk17/1645/])
TIKA-4856: thumbnails catalog preset and ThumbnailUnpackSelector (#3179)
(github:
[https://github.com/apache/tika/commit/8443ce49733c889601a12cb54fbfcde31c309910])
* (add)
tika-server/tika-server-standard/src/test/resources/test-documents/testDOCX_Thumbnail.docx
* (add)
tika-pipes/tika-pipes-core/src/main/resources/META-INF/tika/preset-catalog.properties
* (add)
tika-server/tika-server-standard/src/test/java/org/apache/tika/server/standard/ThumbnailPresetTest.java
* (add)
tika-server/tika-server-standard/src/test/java/org/apache/tika/server/standard/RenderThumbnailPresetTest.java
* (add)
tika-server/tika-server-standard/src/test/resources/configs/tika-config-thumbnail-preset.json
* (edit) docs/modules/ROOT/pages/using-tika/server/index.adoc
* (edit)
tika-serialization/src/main/java/org/apache/tika/config/loader/PresetRegistry.java
* (add)
tika-pipes/tika-pipes-core/src/main/resources/org/apache/tika/pipes/core/presets/render-thumbnail.json
* (add)
tika-pipes/tika-pipes-core/src/test/java/org/apache/tika/pipes/core/extractor/ThumbnailUnpackSelectorTest.java
* (edit) CHANGES.txt
* (edit)
tika-pipes/tika-pipes-core/src/main/java/org/apache/tika/pipes/core/extractor/UnpackExtractor.java
* (edit) tika-core/src/main/java/org/apache/tika/extractor/UnpackSelector.java
* (add)
tika-pipes/tika-pipes-core/src/main/java/org/apache/tika/pipes/core/extractor/ThumbnailUnpackSelector.java
* (add)
tika-server/tika-server-standard/src/test/resources/test-documents/testMP3_twoCovers.mp3
* (add)
tika-server/tika-server-standard/src/test/resources/test-documents/testPDF_bookmarks.pdf
* (add)
tika-pipes/tika-pipes-core/src/main/resources/org/apache/tika/pipes/core/presets/thumbnail.json
> /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?
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
