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govcr is a Go library that records and replays HTTP/HTTPS interactions for testing purposes, acting as an HTTP mock. It wraps an http.Client to intercept requests, either playing back recorded responses from cassette files (JSON) or making live requests and recording them. The library supports various modes (normal, live-only, offline, read-only), cassette encryption (AES-GCM, ChaCha20Poly1305), multiple storage backends (local filesystem, AWS S3), flexible request matching, and request/response transformation via mutators. The architecture centers around a custom http.RoundTripper implementation that integrates cassette storage, request matching, mutation systems, and encryption layers.
RATING:
MAINT: active
DRIFT: low