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BaseHTTPRequestHandler incorrectly expects headers from HTTP/0.9 requests #139492

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Closed as duplicate of#70765
Closed as duplicate of#70765
BaseHTTPRequestHandler incorrectly expects headers from HTTP/0.9 requests#139492
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picnixz
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stdlibStandard Library Python modules in the Lib/ directoryStandard Library Python modules in the Lib/ directorytype-bugAn unexpected behavior, bug, or errorAn unexpected behavior, bug, or error

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@Carmina16
Carmina16
opened on Oct 2, 2025
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Bug report

Bug description:

The HTTPServer class seems to have issues with pre-HTTP 1.0 type requests. The request is not passed to the GET handler until the client closes the connection.

Maybe the BaseHTTPRequestHandler tries to read non-existent headers or wants an empty line in the request?

CPython versions tested on:

3.12

Operating systems tested on:

Windows

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stdlibStandard Library Python modules in the Lib/ directoryStandard Library Python modules in the Lib/ directorytype-bugAn unexpected behavior, bug, or errorAn unexpected behavior, bug, or error

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