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76 lines
2.7 KiB
Markdown
76 lines
2.7 KiB
Markdown
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# pict-rs 0.4.6
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## Overview
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pict-rs 0.4.6 introduces a new internal endpoint to prepare servers for the 0.5.0 upgrade. This is
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to enable the upgrade preparations to be completed on an 0.4 server without taking it offline, thus
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improving the speed at which the upgrade will occur.
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### Features
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- [Upgrade Preparation Endpoint](#upgrade-preparation-endpoint)
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### Changes
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- [Improved Upload Performance](#improved-upload-performance)
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## Upgrade Notes
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There's no significant changes from 0.4.5, so upgrading should be as simple as pulling a new version
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of pict-rs.
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## Descriptions
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### Upgrade Preparation Endpoint
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In pict-rs 0.3 and 0.4, file metadata was automatically extracted from uploads when they were
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created, but earlier versions did not do this. In some scenarios, uploads may be present in pict-rs
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without associated metadata. pict-rs 0.5 introduces a requirement on the presence of this metadata,
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and the upgrade process automatically extracts this information but the upgrade happens before
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pict-rs 0.5 launches its web server, meaning that it will remain inaccessible while it takes the
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time to extract the necessary metadata.
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A new internal endpoint has been introduced at `/internal/prepare_upgrade`. This endpoint will queue
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a job to ensure all uploads pict-rs has handled have associated file metadata. This will improve the
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speed at which the 0.5 upgrade will occur.
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The endpoint is available via a `POST` request, and accepts an optional query parameter `force`
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which can be set to `true` in order to force pict-rs to queue the metadata job, even if it has
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already been queued. Generally, force should not be required.
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After the endpoint is hit once, any further request to the endpoint without the `force` parameter
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will return the current status of the upgrade preparation job.
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Example:
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```bash
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curl \
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-XPOST \
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-H'X-APi-Token: api-key' \
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'http://localhost:8080/internal/prepare_upgrade'
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```
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pict-rs will respond with the following json:
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```json
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{
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"complete": false,
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"progress": 123,
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"total": 456
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}
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```
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This example indicates that the upgrade preparation has processed 123 uploads out of the total 456,
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and it is not complete. One thing to note is that when the job does complete, the progress value may
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still be less than the total value, although it should be close.
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### Improved Upload Performance
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At the cost of memory, pict-rs will now accept file uploads and read their bytes before a permit for
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external processing becomes available. This improves the speed with which uploads complete, and
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allows clients to fully send their requests without being blocked on other uploads. This also fixes
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a bug where it is possible for malicious clients to hold upload requests open and prevent pict-rs
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from being able to process media.
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