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I’ve been getting this error: `Response payload to...
# ask-ai
b
I’ve been getting this error: 
Response payload too large
. What’s going on? The response isn’t that large. Can I increase the payload?
g
The error 
Response payload too large
indicates that the response payload exceeds the maximum allowed size for RPC responses in LiveKit. According to the LiveKit Docs on RPC, the maximum payload size for RPC requests and responses is 15KiB. This limit is in place to ensure compatibility and performance across different platforms. Unfortunately, you cannot increase this payload size limit directly. If your response data is larger than this limit, consider breaking it into smaller chunks or using a different method to transmit the data, such as storing it externally and sending a reference or URL. Would you like more details on how to handle large payloads in LiveKit? Sources: - LiveKit Docs on RPC 👍 0 button 👎 0 button 💡 Hint: Mention @runllm in the thread for followups.
b
@millions-hair-24956 how can I solve for this? Explain how I can break it into smaller chunks.
g
To handle large payloads in LiveKit, you can break the data into smaller chunks and send them sequentially. Here's a step-by-step approach: 1. Chunk the Data: Divide your data into smaller parts, each not exceeding the 15KiB limit. You can use a loop to iterate over the data and create chunks. 2. Send Chunks Sequentially: Use LiveKit's data messages to send each chunk. Ensure that you maintain the order of chunks by numbering them or using a sequence identifier. 3. Reassemble on the Receiver Side: On the receiving end, collect all chunks and reassemble them in the correct order to reconstruct the original data. Here's a basic example in JavaScript using LiveKit's data messages:
Copy code
const data = "Your large data here"; // Replace with your actual data
const chunkSize = 15000; // 15KiB limit
let offset = 0;

// Function to send data in chunks
function sendChunks(data) {
  while (offset < data.length) {
    const chunk = data.slice(offset, offset + chunkSize);
    room.localParticipant.publishData(new TextEncoder().encode(chunk), { reliable: true });
    offset += chunkSize;
  }
}

// Call the function to send data
sendChunks(data);
4. Handle Reception: On the receiver side, listen for data messages, collect them, and concatenate them in the correct order. Would you like more detailed guidance or a specific implementation example? Sources: - LiveKit Docs on Data Messages 👍 0 button 👎 0 button 💡 Hint: Mention @runllm in the thread for followups.
b
@millions-hair-24956 I’m currently using 
room.localParticipant.registerRpcMethod()
to pass on the data back to the server. How would I do that using this method? Is that even possible, or do I have to use 
publishData()
?
g
It seems likely that using 
room.localParticipant.registerRpcMethod()
for large data payloads might not be feasible due to the 15KiB payload size limit for RPC requests and responses in LiveKit. For larger data, you would need to use 
publishData()
to send data messages, as it allows for more flexibility in handling larger payloads by sending them in smaller chunks. Here's how you can adapt your approach: 1. Use 
publishData()
for Large Payloads: Instead of using RPC for large data, use 
publishData()
to send data in chunks. This method is more suitable for handling larger data sizes. 2. Register a Data Handler: On the receiving side, register a handler to process incoming data messages and reassemble them. Here's a basic example of how you might implement this: Sender Side:
Copy code
const data = "Your large data here"; // Replace with your actual data
const chunkSize = 15000; // 15KiB limit
let offset = 0;

function sendChunks(data) {
  while (offset < data.length) {
    const chunk = data.slice(offset, offset + chunkSize);
    room.localParticipant.publishData(new TextEncoder().encode(chunk), { reliable: true });
    offset += chunkSize;
  }
}

sendChunks(data);
Receiver Side:
Copy code
let receivedData = '';

room.on(RoomEvent.DataReceived, (payload, participant) => {
  const chunk = new TextDecoder().decode(payload);
  receivedData += chunk;
  // Check if all chunks are received and process the complete data
});
Would you like more detailed guidance on implementing this approach? Sources: - https://livekit-users.slack.com/archives/C07FVFM5NA1/p1732825484.453059 - https://livekit-users.slack.com/archives/C07FY8WHGPM/p1729735993.197419 👍 0 button 👎 0 button 💡 Hint: Mention @runllm in the thread for followups.
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