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+---
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+title: "🎄 Uppy 3.1-3.3: Improved AWS S3 Multipart, Single File Mode"
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+date: 2022-12-23
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+author:
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+ - aduh95
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+ - arturi
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+ - murderlon
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+ - mifi
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+image: "https://uppy.io/images/blog/3.1-3.3/dashboard-christmas.jpg"
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+published: true
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+---
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+
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+
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+
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+🎅🐶 Ho-ho-ho, we are about to wrap up another year for Uppy! Three `minor` releases ago we’ve introduced Uppy 3.0. It’s time to give you an update on what’s been cooking in the Uppy-Transloadit headquarters (besides cranberry sauce) for the past couple of months.
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+
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+In short: AWS S3 Multipart stability improvements, Single File Mode for the Dashboard, more tests and bugfixes, new locales.
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+
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+<!--more-->
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+
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+## Safer AWS S3 Multipart uploads on slow connections
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+
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+`@uppy/aws-s3-multipart` has been serving well for people who prefer a _client-to\_s3_ setup with Uppy. However, some uploads could occasionally fail in poor network conditions. It turned out, simultaneously signing and uploading many chunks at once saturated the HTTP/1.1 connection limit, which lead to signatures expiring by the time Uppy started uploading the next chunk.
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+
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+We’ve refactored our internal queue mechanism to sign chunks right before we begin uploading them to the remote server. When the upload is paused, the queue is emptied and re-populated again on resume. The default `limit` for this plugin has been set to `6` and the default S3 signature expiry has been lifted from `300` to `800` seconds.
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+
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+## Single File Mode
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+
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+Often times people only want to upload a single file (most commonly an image) via Uppy. But the Dashboard UI is tailored to handling many files at once, and it used to display the single image as a small, sad-looking block in the corner. This ends now! (Actually, it ended a few releases ago, figure of speech).
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+
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+<img src="/images/blog/3.1-3.3/single-file-mode.jpg" class="border" />
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+
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+With only one file selected, we’ll display it large and centered, and make sure to re-generate the image preview so it’s `600px` wide, looking nice and sleek on modern displays.
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+
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+See [PR #4188](https://github.com/transloadit/uppy/pull/4188) for more screenshots.
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+
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+## Bug fixes and Upgrades
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+
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+We’ve upgraded Typescript to `v4.8` and Jest to `v29`, among other tools and packages.
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+
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+We are now additionally testing that Uppy packages are correctly bundled with the latest Rollup, Webpack, Parcel, Vite, and ESBuild.
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+
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+Notable bug fixes:
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+
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+* XHR Upload: Queue requests for socket token for remote files
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+* Core: Prevent crashes when a file is removed before the upload starts
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+* Golden Retriever: Fixed upload retries
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+* AWS S3 and XHR Upload: Fixed Cannot mark a queued request as done in MiniXHRUpload
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+* Webcam: Set default videoConstraints
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+* Image Editor: Fix controls in small Dashboard
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+
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+See the full list in the [changelog](https://github.com/transloadit/uppy/blob/main/CHANGELOG.md).
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+
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+## Companion
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+
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+And of course, this festive season we are not forgetting Companion under the tree:
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+
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+* Throttle progress by time
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+* Added workaround for S3 accelerated endpoints
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+* Send expire info for non-multipart uploads
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+* Send expiry time alongside S3 signed requests
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+* Added support for AbortSignal
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+* Prevent preflight race condition
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+
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+## Locales
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+
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+Uzbek language pack was added, while Polish and Ukrainian language packs were updated.
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+
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+***
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+
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+That’s it for our updates! Stay tuned for more in 2023 and happy holidays (if you are celebrating)! Cheers. In the meantime, we are driving home, driving home for Christmas. Yeah.
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