refactor(libdd-telemetry)!: avoid leaking libdd-common types in the public API#2152
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refactor(libdd-telemetry)!: avoid leaking libdd-common types in the public API#2152hoolioh wants to merge 1 commit into
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| if !api_key.is_empty() { | ||
| try_c!(config.set_endpoint_api_key(Some(api_key.as_ref()))); | ||
| } |
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When the builder was instantiated from an environment with _DD_DIRECT_SUBMISSION_ENABLED=true and DD_API_KEY set, passing an empty api_key here no longer clears that key while replacing the endpoint. The previous Endpoint-based setter replaced the whole endpoint, so ddog_endpoint_from_url(...) produced an endpoint with no API key; now the old key is preserved and set_endpoint_url rewrites HTTP URLs to the direct-submission path, causing callers that explicitly configure an agent/file endpoint without a key to send with the stale API key and potentially to /api/v2/apmtelemetry instead of the agent proxy path.
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I suppose the solution is to set to None if the api key is empty, instead of not setting anything?
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I initially thought you wanted to get rid of the libdd-common dependency for libdd-telemetry. But if I understand correctly, there's still a Endpoint lurking there internally, is that correct? Then I'm not sure I understand the motivation. Is it just to avoid having to add explicitly libdd-common for end-user crates just to import Endpoint? Then why not just re-export it from libdd-telemetry, if it's there anyway?
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| if !api_key.is_empty() { | ||
| try_c!(config.set_endpoint_api_key(Some(api_key.as_ref()))); | ||
| } |
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I suppose the solution is to set to None if the api key is empty, instead of not setting anything?
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| url: ffi::CharSlice, | ||
| api_key: ffi::CharSlice, | ||
| timeout_ms: u64, | ||
| test_token: ffi::CharSlice, | ||
| use_system_resolver: bool, |
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The endpoint seems to carry quite a bit of different fields, that now have to be set manually one by one and inflate function arguments (there's a risk to forget about one field when setting the endpoint now instead of cfg.set_endpoint previously). I'm just thinking out loud, but would it make sense to re-introduce an Endpoint (or a different name) but stand-alone in libdd-telemetry that packs url, api_key, timeout_ms, together ? At least if we always want to set them all at once.
| let mut config = Config::from_env(); | ||
| config.direct_submission_enabled = true; | ||
| config.debug_enabled = true; | ||
| let api_key = std::env::var("DD_API_KEY").unwrap(); |
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I know this existed before this PR, but we should avoid reading env vars in libdatadog. Not sure this one can really be avoided in a cross-platform way though...
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What does this PR do?
Break down endpoint settings into smaller functions which accept primitive types in order not to leak libdd-common types through the public API.
Motivation
Most of downstream projects don't use the Endpoint abstraction because it's thought to handle connections with intake/agent so forcing them to import libdd-common just to configure the connection doesn't seem right.