This repository is a storage provider plugin for Synapse, the Matrix homeserver, that stores media in S3-compatible object storage. It is a Python package installed as a module and loaded by Synapse at runtime. The core is a single module, s3_storage_provider.py, which implements Synapse's storage provider API and translates local media operations into S3 GET/PUT/HEAD/DELETE calls via boto3. It supports SSE-C encryption, custom S3 endpoints, and a local cache. A companion CLI script, s3_media_upload, migrates existing local media to S3. Architecturally, the system is a library/plugin rather than a standalone service. Synapse invokes the provider's methods to store and retrieve media; the provider uses background threads (_S3DownloadThread, _S3UploadThread) to perform asynchronous operations with backpressure. The code uses threading locks and events to coordinate concurrent access, and includes tests, CI workflows, and release automation. The primary entry point is the S3StorageProvider class instantiated by Synapse; the module can also be run as a script for maintenance, and scripts/s3_media_upload provides a CLI. External dependencies include boto3 for S3 access, Synapse as the host application, and Twisted for tests. The repository is actively maintained with recent commits, dependabot updates, and GitHub Actions for CI and releases.
AnExplorer is a native Android file-manager application (package dev.dworks.apps.anexplorer) that exposes a Storage Access Framework-compatible DocumentsProvider layer over many storage backends: external/internal storage, USB OTG, root shell, FTP/FTPS, cloud storage (Google Drive, Dropbox, OneDrive, Box via CloudRail), app management, zip archives, recent files, and a note editor. It is a heavily customized fork of AOSP DocumentsUI: the core browsing state-machine, document stack, roots cache, recents persistence, and loader/cursor stack are AOSP-derived, with substantial product-specific additions for monetization, multiple build flavors, PIN security, settings, and Wear OS/TV support. The marketing site in web/ is a static Firebase-hosted page, not part of the application logic. The architecture is a classic Android monolith: Activities and Fragments drive the UI, Loaders and custom Cursor wrappers feed RecyclerView adapters, and each storage backend is implemented as a DocumentsProvider ContentProvider. Main entry points are DocumentsActivity and StandaloneActivity for browsing, plus the provider authority intents for the Storage Access Framework. External dependencies include AndroidX, Firebase Analytics/AdMob/Crashlytics, CloudRail, libaums for USB, Apache Commons Net for FTP, and an in-app billing library. Quality is mixed. The provider and cursor abstractions are reasonably flexible and a few utility components are genuinely reusable, but the codebase carries heavy technical drift: AGP 3.3 alpha, targetSdk 28, deprecated android.app.Fragment/AsyncTask/PreferenceActivity usage, duplicated flavor-specific classes, hardcoded ad and analytics identifiers, and third-party SDKs that are no longer actively maintained. It remains a functional, feature-complete consumer app rather than a modern engineering showcase.