java.nio.BufferUnderflowException #847
Comments
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Could you reproduce this with Chrome? Thanks! |
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Yes I get the same exception with Chrome (version 71.0.3578.98) |
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Interesting... can you give us a link to your client side source code? |
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This is my simple html client side code Click to expand<!DOCTYPE html>
<html>
<head>
<style>
#messages {
text-align: left;
width: 50%;
padding: 1em;
border: 1px solid black;
}
</style>
<title>WebSocket Client</title>
</head>
<body>
<div class="container">
<div id="messages" class="messages"></div>
<div class="input-fields">
<p>Type a message and hit send:</p>
<input id="message"/>
<button id="send">Send</button>
<p>Select an image and hit send:</p>
<input type="file" id="file" accept="image/*"/>
<button id="sendImage">Send Image</button>
</div>
</div>
</body>
<script>
const messageWindow = document.getElementById("messages");
const sendButton = document.getElementById("send");
const messageInput = document.getElementById("message");
const fileInput = document.getElementById("file");
const sendImageButton = document.getElementById("sendImage");
const socket = new WebSocket("ws://localhost:8080");
socket.binaryType = "arraybuffer";
socket.onopen = function (event) {
addMessageToWindow("Connected");
};
socket.onmessage = function (event) {
if (event.data instanceof ArrayBuffer) {
addMessageToWindow("Got Image:");
addImageToWindow(event.data);
} else {
addMessageToWindow("Got Message: " + event.data);
}
};
sendButton.onclick = function (event) {
sendMessage(messageInput.value);
messageInput.value = "";
};
sendImageButton.onclick = function (event) {
var reader = new FileReader();
reader.onload = function() {
sendMessage(this.result);
};
reader.readAsArrayBuffer(fileInput.files[0]);
fileInput.value = null;
};
function sendMessage(message) {
socket.send(message);
addMessageToWindow("Sent Message: " + message);
}
function addMessageToWindow(message) {
messageWindow.innerHTML += "<div>" + message + "</div>";
}
function addImageToWindow(image) {
let url = URL.createObjectURL(new Blob([image]));
messageWindow.innerHTML += "<img src='" + url + "'/>";
}
</script>
</html> |
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I can't reproduce this behaviour. I can successfully upload & download images of size over 40 MB. I'd appreciate if you could post the following details:
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Was able to reproduce this with 65.0-64 bit running against the ChatServer example using your avatar image @PhilipRoman (https://avatars2.githubusercontent.com/u/33231208?s=400&v=4) Worked best when trying to upload the same image multiple times Only affects Firefox currently as it seems.. |
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Very strange. I've tried on Java 8 and Java 11; on Chrome 71.0.3578.98, Firefox Quantum 64.0.2 (64-bit), MS Edge with my avatar and loads of other files I could find, but none of them triggered the error. |
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Looks like the bug cause is #805, in detail my refactoring of translateSingleFramePayloadLength (call by value instead of reference for realpacketsize). |
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@nalizadeh could you confirm that this only affects 1.4.0? Best regards, |
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Looks like it happens only on 1.4.0 (I was previously testing on 1.3.9)! I tested on library version 1.4.0 and it fails reliably. The issue is not related to client side and can be reproduced by sending a byte buffer from JWS client.
If in step 3 the buffer size is 1, the following error occurs instead: |
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specific image file which causes it to fail server side code java version & Java-WebSocket library version could you confirm that this only affects 1.4.0? Good luck with bug fixing! :) |
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Fixing this tonight! |
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Now that's solved for me, many Thanks :) |
Hello community,
I am not sure if this is a bug or a mistake of mine. I'm trying to upload images from an HTML page, it works quite well with small images (max size = 16kb), but with large images the server throws the exception java.nio.BufferUnderflowException.
Is there a way to increase the frame capacity here?
I use the Firefox Quantum as a browser.
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