README.md

🎯 Goal

We want to stream JSON/text data from the server to the browser in chunks, with a short delay between each chunk — without needing the full response to be prepared up front.

This is perfect for:

• Real-time logs
• Progressive data loading
• Simulating live data feeds

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📦 HTTP Streaming with Chunked Encoding

Instead of sending all data at once, we use:

Transfer-Encoding: chunked

This tells the browser:

“I'm sending data in parts. Keep listening — more will come.”

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🧠 Key Concepts in the Code

✅ 1. Enable Chunked Transfer Mode

By setting this header, the server tells the client: "Data will come in pieces."

res.writeHead(200, {
  'Content-Type': 'application/json',
  'Transfer-Encoding': 'chunked',
});

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✅ 2. Send Data in Intervals

We simulate live data by sending one chunk every 2 seconds using setInterval():

const interval = setInterval(() => {
  res.write(`💡 Chunk ${count} sent at ${count * 2}s\n`);
}, 2000);

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✅ 3. End the Stream Gracefully

Once we’re done sending all chunks, we clean up and tell the browser we’re finished:

res.write('🟢 All chunks sent.\n');
res.end();

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🔍 Why Use Chunked Streaming?

Chunked transfer is great when:

• You don’t know the full response size in advance
• You want to stream progressively
• You’re mimicking a live data source

It helps the browser or client:

• Show real-time updates without reloading
• Handle large datasets without waiting for everything

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🛠️ Real-World Uses

✅ Real-time analytics dashboards
✅ Server log viewers
✅ Long-running API responses
✅ Chat messages and notifications