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LibWeb: Use application/octet-stream for unknown FormData file types

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Required by web.whatsapp.com, which uses fetch() to send FormData
bodies containing Files with empty types.
Ref https://github.com/LadybirdBrowser/ladybird/issues/2941
This commit is contained in:
Luke Wilde 2025-01-28 19:05:25 +00:00 • committed by Andreas Kling
parent 18b75afef8
commit 3295ed17ea
Notes: github-actions[bot] 2025-01-29 08:26:33 +00:00
1 changed files with 7 additions and 1 deletions
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8
Libraries/LibWeb/HTML/FormControlInfrastructure.cpp
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@ -278,7 +278,13 @@ ErrorOr<SerializedFormData> serialize_to_multipart_form_data(Vector<XHR::FormDat
// Add a `Content-Disposition` header with a `name` set to entry's name and `filename` set to entry's filename.
TRY(builder.try_append(TRY(String::formatted("Content-Disposition: form-data; name=\"{}\"; filename=\"{}\"\r\n", escaped_name, escaped_filename))));
// The parts of the generated multipart/form-data resource that correspond to file fields must have a `Content-Type` header specified.
TRY(builder.try_append(TRY(String::formatted("Content-Type: {}\r\n\r\n", file->type()))));
// RFC7578: If the contents of a file are to be sent, the file data SHOULD be labeled with an appropriate media type, if known, or
// "application/octet-stream".
if (!file->type().is_empty()) {
TRY(builder.try_append(TRY(String::formatted("Content-Type: {}\r\n\r\n", file->type()))));
} else {
TRY(builder.try_append("Content-Type: application/octet-stream\r\n\r\n"sv));
}
TRY(builder.try_append(file->raw_bytes()));
TRY(builder.try_append("\r\n"sv));
return {};