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Provide a default host header to make request as valid as possible#1084

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benoittgt wants to merge 1 commit intobblimke:masterfrom
benoittgt:prevent-empty-host
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Provide a default host header to make request as valid as possible#1084
benoittgt wants to merge 1 commit intobblimke:masterfrom
benoittgt:prevent-empty-host

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@benoittgt
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While working on this sinatra/sinatra#2053 in our project. I noticed than when using Webmock, Sinatra logs and especially the enforced rack-protection were showing this kind of logs:

D, [2024-11-22T13:05:16.798156 #26673] DEBUG -- : Rack::Protection::HostAuthorization @all_permitted_hosts=[".company.com"] @permitted_hosts=["company.com"] @domain_hosts=[/\A(?-mix:[a-z0-9\-.]+)company\.com\z/i] @ip_hosts=[] origin_host="" forwarded_host=nil

As you can see, origin_host is empty, because the header is missing.

When not using webmock, we fallback on net/http host header setup. https://github.com/ruby/net-http/blob/cfbbb50c931a78fc2b5c731b9abeda161e1dfdd1/lib/net/http.rb#L2482

I think Webmock should also set this host header.

I looked at the test quickly but didn't find an easy to check for this change.

While working on this sinatra/sinatra#2053 in
our project. I noticed than when using Webmock, sinatra logs and
especially the enforced rack-protection were showing this kind of logs:

```
D, [2024-11-22T13:05:16.798156 #26673] DEBUG -- : Rack::Protection::HostAuthorization @all_permitted_hosts=[".company.com"] @permitted_hosts=["company.com"] @domain_hosts=[/\A(?-mix:[a-z0-9\-.]+)company\.com\z/i] @ip_hosts=[] origin_host="" forwarded_host=nil
```

As you can see, `origin_host` is empty, because the header is missing.

When not using webmock, we fallback on `net/http` host header setup.
https://github.com/ruby/net-http/blob/cfbbb50c931a78fc2b5c731b9abeda161e1dfdd1/lib/net/http.rb#L2482
@benoittgt
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Rebased. I think this pull request is still interesting.

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