Handle multiple file uploads

[sc68cal]

It is possible to have a file input that has multiple files uploaded.

https://developer.mozilla.org/en-US/docs/Web/API/HTMLInputElement/multiple

<form action="/{{ jetzig_view }}" method="POST" enctype="multipart/form-data" id="myform">
        <input class="form-control" type="file" name="attachments" multiple>
</form>

HTTP POST parameters

------geckoformboundarye011264df08dce9643f770aab11f4ec7
Content-Disposition: form-data; name="attachments"; filename="file_upload_1.txt"
Content-Type: text/plain

foo

------geckoformboundarye011264df08dce9643f770aab11f4ec7
Content-Disposition: form-data; name="attachments"; filename="file_upload_2.txt"
Content-Type: text/plain

bar

------geckoformboundarye011264df08dce9643f770aab11f4ec7--

Currently calling request.file only appears to return the first attachment, and looking briefly through the code there does not appear to be any handling of multiple, although I could be mistaken.

    if (try request.file("attachments")) |attachments| {
        try request.server.logger.DEBUG("{s}", .{attachments.content});
    }

DEBUG [2025-03-25T16:14:34] foo

[sc68cal]

Debug printing the return from request.file("attachments") (attachments in the capture) yields

DEBUG [2025-03-25T16:10:40] jetzig.http.File{ .filename = { 102, 105, 108, 101, 95, 117, 112, 108, 111, 97, 100, 95, 49, 46, 116, 120, 116 }, .content = { 102, 111, 111, 10 } }

[sc68cal]

I think the responsible line is

jetzig/src/jetzig/http/MultipartQuery.zig

Line 20 in 2c52792

if (std.mem.eql(u8, name, key)) return jetzig.http.File{

which needs to be changed to loop