lib: clarify 'conn->httpversion'

The variable `conn->httpversion` was used for several purposes and it
was unclear at which time the value represents what.

- rename `conn->httpversion` to `conn->httpversion_seen`
  This makes clear that the variable only records the last
  HTTP version seen on the connection - if any. And that it
  no longer is an indication of what version to use.
- Change Alt-Svc handling to no longer modify `conn->httpversion`
  but set `data->state.httpwant` for influencing the HTTP version
  to use on a transfer.
- Add `data->req.httpversion_sent` to have a record of what
  HTTP version was sent in a request
- Add connection filter type CF_TYPE_HTTP
- Add filter query `CF_QUERY_HTTP_VERSION` to ask what HTTP
  filter version is in place
- Lookup filters HTTP version instead of using `conn->httpversion`

Test test_12_05 now switches to HTTP/1.1 correctly and the
expectations have been fixed.

Removed the connection fitler "is_httpN()" checks and using
the version query instead.

Closes #16073
This commit is contained in:
Stefan Eissing 2025-01-22 14:45:30 +01:00 committed by Daniel Stenberg
parent 7e814c8717
commit e83818cae1
No known key found for this signature in database
GPG key ID: 5CC908FDB71E12C2
21 changed files with 206 additions and 203 deletions

View file

@ -76,7 +76,7 @@ char *Curl_checkProxyheaders(struct Curl_easy *data,
CURLcode Curl_add_timecondition(struct Curl_easy *data, struct dynbuf *req);
CURLcode Curl_add_custom_headers(struct Curl_easy *data, bool is_connect,
struct dynbuf *req);
int httpversion, struct dynbuf *req);
CURLcode Curl_dynhds_add_custom(struct Curl_easy *data, bool is_connect,
struct dynhds *hds);