Cole-Greer commented on code in PR #3472:
URL: https://github.com/apache/tinkerpop/pull/3472#discussion_r3469801275
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docs/src/upgrade/release-4.x.x.asciidoc:
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@@ -32,6 +32,49 @@ complete list of all the modifications that are part of this
release.
=== Upgrading for Users
+==== Standardizing JavaScript Connection Options
+
+TinkerPop 4.x standardizes connection option names and defaults across the
GLVs. In `gremlin-javascript`, the driver
+now adopts `undici` as a pinned dependency that ships a default dispatcher,
several dead options have been removed, the
+standalone `headers` option has been deprecated, and a number of new options
have been added. The notes below describe
+the JavaScript changes. See <<glv-driver-changes, GLV Driver Changes>> for the
equivalent changes in the other
+drivers.
+
+Renames (deprecated aliases). The following option has been deprecated. It
still works but should be migrated:
+
+- `headers` is deprecated. The standalone `headers` option is now implemented
via a synthesized interceptor, so custom
+headers continue to work without re-introducing dead configuration. Prefer
setting custom headers via an interceptor
+directly, e.g. `interceptors: (req) => { req.headers['X-Custom'] = 'value';
}`. When the `headers` option is set, it is
+applied by an interceptor that runs before the auth interceptor, so SigV4
still signs over those headers.
+
+Behavior changes. These change runtime behavior on upgrade, even if you do not
change your configuration:
+
+- `compression` now defaults to `'deflate'` (on), so the driver sends
`Accept-Encoding: deflate` by default. It is a
+`'none'`/`'deflate'` string union. Set `'none'` to disable it.
+- `maxConnections` now caps concurrent connections per origin at 128 by
default, where the number of connections was
+previously uncapped.
+
+New options:
+
+- `readTimeout`: a per-read idle (body) timeout in milliseconds applied to the
default dispatcher (undici
+`bodyTimeout`). It resets per chunk, so it is safe for streaming.
+- `maxResponseHeaderBytes`: the maximum size of the response headers in bytes
applied to the default dispatcher (undici
+`maxHeaderSize`).
+- `keepAliveTime` (default 30000 ms): the idle time before TCP keep-alive
probes begin, applied to the default
+dispatcher via a `SO_KEEPALIVE` connector. Set 0 to disable.
+- `proxy`: an HTTP proxy URI that routes requests through an undici
`ProxyAgent`.
+- `defaultBatchSize` (default 64): a connection-level default that fills a
request's `batchSize` when it is left unset.
+- `bulkResults` (default false): a connection-level default for `bulkResults`
applied to every request unless
+overridden per-request. The `DriverRemoteConnection` traversal path defaults
to `true` regardless of this setting.
+- `logger`: a logger object (with `debug`/`info`/`warn`/`error` methods) or a
`(level, message, ...args)` callback.
+Logging is disabled when unset.
+
+The dead `agent`, `ca`, `cert`, `pfx`, and `rejectUnauthorized` fields have
been removed. They were declared but never
Review Comment:
Building on my comment above, `ca`, `cert`, `pfx` and `rejectUnauthorized`
were active and used in 3.8, they should be described as removed or replaced.
`agent` was introduced during my work on 4.0.0-beta.2 as part of the migration
to the fetch API. I think that can be removed cleanly without any
acknowledgement in the docs as it never existed in any stable release.
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