forked from extern/nushell
9c7e37f728
# Description Hi nushell! Thanks so much for [adding http headers][headers]! I've been waiting for this feature for a long time and it's great. However, I found that `Record` as a return type and using `ureq`'s `response.header` api results in missing header values when there are multiple with the same name, as can occur with `set-cookie` and others. This issue with http has been discussed at length [on stackoverflow][stackoverflow] and in [`ureq` itself][ureq]. It seems like concatenating header values with `,` is a common solution, but tricky especially with `set-cookie` which may contain `,` in the `Expires` field, as discussed in the former post. I propose changing the return type to a `List` of `Record` so we can get all of the header values without relying on ad-hoc mutation. This solution does not return the headers in the same order as they appear in the `Response` due to `ureq`'s `Response.all` API, but it's better than dropping values imo. This is a **breaking change**. I'm sure `ureq`'s [`CookieStore`][cookiestore] is a better long-term solution for returning cookies as a separate record on `http <method>`, but other headers can be set multiple times as well. # User-Facing Changes - Changes the return type of an `http <method>` `header` field from `Record` to `List` (Table with columns `name` and `value`) - Returns all values of a header set multiple times instead of just the first one duplicated # Implementation Quick note that running `header_names.dedup()` does not resolve the necessity to iterate through the previously parsed headers since `dedup` only removes identical values when they are next to each other in the `Vec`. You could do a `sort` first, but header ordering can be important in some cases, so I tried to avoid messing with that more than is already the case with `Response.all`. Would love to see a better way of doing this though! # Tests + Formatting No tests broke implementing this change. Not sure what endpoint to hit or mock server to use to verify this in tests. I have some screenshots to illustrate what I'm talking about. Before:  > `set-cookie` has the same value for every record field. > Even if it did not I'm not sure how you would access the different values since they all have the same key. After:  > Actual values from the response returned for the same name Make sure you've run and fixed any issues with these commands: - [x] `cargo fmt --all -- --check` to check standard code formatting (`cargo fmt --all` applies these changes) - [x] `cargo clippy --workspace -- -D warnings -D clippy::unwrap_used -A clippy::needless_collect -A clippy::result_large_err` to check that you're using the standard code style - [x] `cargo test --workspace` to check that all tests pass - [x] `cargo run -- crates/nu-std/tests/run.nu` to run the tests for the standard library <-- Note: I did not see a `crates/nu-std/test/run.nu` file so I ran the snippet below which returned without error ```nushell for $i in (ls crates/nu-std/tests/*.nu) { cargo run -- $i.name } ``` # Code of Conduct Apologies for not opening an issue first. Just did this fix for myself because it seemed simple enough before deciding to open this PR. # After Submitting <!-- If your PR had any user-facing changes, update [the documentation](https://github.com/nushell/nushell.github.io) after the PR is merged, if necessary. This will help us keep the docs up to date. --> - [ ] update docs [stackoverflow]: https://stackoverflow.com/questions/3241326/set-more-than-one-http-header-with-the-same-name [headers]: https://github.com/nushell/nushell/pull/8571 [ureq]: https://github.com/algesten/ureq/issues/95 [cookiestore]: https://docs.rs/cookie_store/latest/cookie_store/struct.CookieStore.html |
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