HttpServerRequest.formAttributes() has redundant /r

[scx567888]

Questions

HttpServerRequest.formAttributes() has redundant /r

Version

4.3.3

Context

I create a simple upload handler. But when I select a picture file, I cannot get the right data. field fileMD5 value has redundant /r

Do you have a reproducer?

https://github.com/scx567888/error-example2

Steps to reproduce

1. Run Main.java
2. Open browser to http://localhost:8888/
3. Select file 1.jpg (in my repo file directory)
4. Multiple clicks upload button and see terminal (not browser console)
5. You will see the bug

Extra

Browser : Edge 104.0.1293.54 (x64) JDK : openjdk version "17.0.4" 2022-07-19 (x64) OS : Windows 10 19044.1889 (x64)

[scx567888]

When i change file name 1.jpg -> 111.jpg . I will get right fileMD5 , It seems to be related to the name of the file

[scx567888]

It seems that the bug occurs only when the file is https://github.com/scx567888/error-example2/blob/master/file/1.jpg and the name is 1.jpg

[scx567888]

[pendula95]

Can not reproduce, using Linux.

[scx567888]

https://user-images.githubusercontent.com/75682569/185769593-bf6e283b-85e2-4162-a027-9b70e73902e5.mp4

[vietj]

I'm able to reproduce the issue.

[vietj]

it might be a bug in Netty post request decoder

[vietj]

it's very dependant on the timing of the post data, here is a reproducer for vertx-core

  @Test
  public void testReproducer() throws Exception {
    server.requestHandler(req -> {
      req.setExpectMultipart(true);
      req.endHandler(v -> {
        System.out.println("DONE " + ByteBufUtil.hexDump(Unpooled.copiedBuffer(req.formAttributes().get("fileMD5"), StandardCharsets.UTF_8)));
        testComplete();
      });
    });
    startServer();
    NetClient client = vertx.createNetClient();

    String[] data1 = {
      "POST /upload HTTP/1.1\r\n" +
        "Host: localhost:8888\r\n" +
        "Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryF7zkICxC5SbKfiqX\r\n" +
        "Origin: http://localhost:8888\r\n" +
        "Accept-Encoding: gzip, deflate\r\n" +
        "Connection: keep-alive\r\n" +
        "Accept: */*\r\n" +
        "User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.1.2 Safari/605.1.15\r\n" +
        "Referer: http://localhost:8080/\r\n" +
        "Content-Length: 8437\r\n" +
        "Accept-Language: en-us\r\n" +
        "\r\n",
      "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",
      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      "0a2d2d2d2d2d2d5765624b6974466f726d426f756e6461727946377a6b494378433553624b666971580d0a436f6e74656e742d446973706f736974696f6e3a20666f726d2d646174613b206e616d653d226368756e6b4c656e677468220d0a0d0a310d0a2d2d2d2d2d2d5765624b6974466f726d426f756e6461727946377a6b494378433553624b666971580d0a436f6e74656e742d446973706f736974696f6e3a20666f726d2d646174613b206e616d653d226e6f774368756e6b496e646578220d0a0d0a300d0a2d2d2d2d2d2d5765624b6974466f726d426f756e6461727946377a6b494378433553624b666971582d2d0d0a"
    };
    String[] data = data1;
    client.connect(testAddress).onComplete(onSuccess(so -> {
      so.write(data[0]).onComplete(onSuccess(v1 -> {
        so.write(Buffer.buffer(ByteBufUtil.decodeHexDump(data[1]))).onComplete(onSuccess(v2 -> {
          so.write(Buffer.buffer(ByteBufUtil.decodeHexDump(data[2]))).onComplete(onSuccess(v3 -> {
            vertx.setTimer(1, id -> {
              so.write(Buffer.buffer(ByteBufUtil.decodeHexDump(data[3]))).onComplete(onSuccess(v4 -> {

              }));
            });
          }));
        }));
      }));
    }));
    await();
  }

[scx567888]

I also found that it was netty decoder problem , but I don't know why this weird bug occurs 😂.

[vietj]

what happens is that when a part is parsed until \r it happens, e.g

---- ....
part
....\r

then you have the next chunk

\n---- ....
...

the parser will take a branch which has a bug

[vietj]

See https://github.com/netty/netty/issues/12729

[scx567888]

Thank you.

[pmlopes]

Closing as this isn't vert.x related.