http panic in wasm due to capitalized header name

[minijackson]

Description

Hello! I'm building a wasm app using meilisearch-sdk, and found this confusing error when calling Client::new:

index out of bounds: the len is 0 but the index is 0

Expected behavior

Client::new does not panic.

Current behavior

Turns out it's http's way of telling us that a header name is capitalized, and panics.

Here's the http code that panics (HeaderName::from_static):

https://github.com/hyperium/http/blob/v1.1.0/src/header/name.rs#L1197-L1224

And I think the X-Meilisearch-Client is what causes it:

https://github.com/meilisearch/meilisearch-rust/blob/v0.26.0/src/reqwest.rs#L35

Environment (please complete the following information):

• OS: wasm32
• Meilisearch version: v1.7.6
• meilisearch-rust version: v0.26.0
• http version: v1.1.0 (behavior should be the same with http v1.0.0)

[DimitriTimoz]

As specified in this seanmonstar/reqwest#630 response headers implementation is not officially supported in reqwest.
web_sys should be used for every request to be sure of wasm support.
I guess someone broke it recently.

[irevoire]

Hey @minijackson,

Could you retry your app with this branch and let me know if everything works: #582
I’m struggling to run the example in this repo