This repository manages the CDC Data Exchange (DEX) Upload functionalities. It is the entrypoint of files into DEX.
- upload-service: An implementation of the Tus service as a library in a Golang application. This service is responsible for facilitating file uploads over HTTP. It also includes a suite of upload lifecycle hooks for establishing observability into the upload process.
- Bulk File Upload: blob-created events from the DEX storage account (dataexchange + env) by subscribing to the "tus-upload-complete" event hub. It copies files from the raw upload container to the DEX container, organizing them into folders based on accompanying metadata. The metadata configuration is used to determine the appropriate final destination, either EDAV or DEX routing containers.
/.github/workflows
- tests and CI/CD
tus/file-hooks
hooks employed include:
- pre-create
- post-create
- post-finish
- post-receive
upload-configs
holds configuration for metadata and file routing for each supported use case in JSON format. These files follow a {use case}-{use case category}.json
naming convention. Where the use case represents the data stream, and the use case category represents the data stream route. For example, AIMS-CELR is a CDC program and supported use case within DEX. They have one use case ID, aims-celr
, which represents their data stream ID. Within this use case, they have two categories: csv
and hl7
, which represent the two data stream routes for this program. To configure AIMS-CELR for the Upload API, we create two JSON files for them, namely aims-celr-csv.json
and aims-celr-hl7.json
. This pattern applies for all use cases onboarded to DEX.
Within a particular JSON file, you will find the custom sender manifest schema for a given use case, as well as file routing configuration. The sender manifest schema defines validation rules for the fields and values senders provide when uploading a file. We currently support two versions of schemas, v1 and v2.
/BulkFileUploadFunctionApp
event triggered azure function to process uploaded files. This component of the Upload API is responsible for normalizing the filename and attached metadata for a given uploaded file, as well as routing the file to the appropriate routing or EDAV storage accuonts.
/tests/smoke/kotlin
- The Upload API's official smoke test suite for testing all onboarded use cases across all e/tests/smoke/playwright
/spikes
exploratory development spikes, archive.
This repository is using the TUS resumable upload protocol: https://tus.io/, and reference implementation: https://github.com/tus/tusd
Example clients, for back-end or browser (front-end), to upload files: https://github.com/CDCgov/data-exchange-api-examples
- Rework of the tus service to use Tus v2 as a library within a GoLang service
- Simplification of Tus hooks
- Simplification of PS API integration to only focus on reporting
- Improved parallel upload experience with a distributed file lock
- Implementation of Command/Event architecture
- Deployment to Kubernetes instead of Azure App Service
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