[BUG] Custom headers not sent when const=False

[cirospaciari]

Description

Custom header is only sent when const=True
Expected Behavior

Custom header must always be sent even without const=True

Environment:

• Host OS: Debian GNU/Linux bookworm/sid x86_64 Kernel 6.0.0-2-amd64
• Browser: Chrome 107.0.5304.110

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[Optional] Additional Context

When using const=False no Custom headers are sent.

app.add_header("Server", "Robyn")
app.add_header("Content-Type", "text/plain")

@app.get('/plaintext')
def plaintext() -> str:
    return "Hello, world!"

When using const=True Date headers are sent.

@app.get('/plaintext', const=True)
def plaintext() -> str:
    return "Hello, world!"
    

I just find this, when trying to run TechEmPower Benchmarks without const

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[sansyrox]

Thank you @cirospaciari for opening this issue 😄

Can you please elaborate on what you mean by the Date headers?

[cirospaciari]

Sorry actually i misunderstood the issue, whats is happening is:
After adding this custom headers

app.add_header("Server", "Robyn")
app.add_header("Content-Type", "text/plain")

Without const=True the headers are not sent.
Date header is fine

[sansyrox]

@cirospaciari , this shouldn't happen. Will have to investigate. Thanks!