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fix HTTP/2 docs #3262

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ArkadyRudenko wants to merge 1 commit into from
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fix HTTP/2 docs #3262

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7 changes: 7 additions & 0 deletions docs/http2.md
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Expand Up @@ -58,6 +58,13 @@ requests and responses will be transported over HTTP/2, since both the client
*and* the server need to support HTTP/2. If you connect to a server that only
supports HTTP/1.1 the client will use a standard HTTP/1.1 connection instead.

To force HTTP/2 to be enabled, disable HTTP/1.1. Otherwise, the client will try to use HTTP/1.1

@lovelydinosaur lovelydinosaur Aug 14, 2024

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This isn't correct. Here's the deal...

  • Default. http1=True, http2=False - HTTP/1.1 will be used.
  • HTTP/2 support enabled. http1=True, http2=True - Either HTTP/1.1 or HTTP/2 will be used. The protocol negotiation (ALPN) occurs during the SSL setup.
  • Force HTTP/2. http1=False, http2=True - HTTP/2 will be used, without negotiation. Not a typically useful configuration, tho allows HTTP/2 over plain HTTP.

```python
client = httpx.AsyncClient(http1=False, http2=True)
# or
async with httpx.AsyncClient(http1=False, http2=True) as client:
```

You can determine which version of the HTTP protocol was used by examining
the `.http_version` property on the response.

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