求助：无法连接Coinfloor WebSocket API，无响应仅返回空字节串

I’ve run into similar silent-failure issues with crypto exchange WebSocket APIs before, so let’s break down the most likely fixes for your problem where you’re only getting empty byte strings instead of valid JSON responses (or even error messages) from Coinfloor’s WebSocket API.

1. Verify Initialization & Authentication Steps #

The official docs state that commands, replies, and notifications are sent as text frames with JSON payloads — but many crypto APIs won’t send any data until you complete a required setup step first.

• Double-check if you’re sending an authentication or initial command immediately after the WebSocket handshake completes. Some exchanges require you to authenticate with an API key/secret before any data flows, and if you skip this, the server might just hold the connection open without sending anything (including errors).
• Ensure your client is sending data as text frames, not binary frames. For example, in Python’s websockets library, use await websocket.send(json.dumps(your_command)) instead of send_bytes(). Using binary frames when the server expects text will result in unparsable requests, leading to silent failures.

2. Validate Your Request JSON Format #

Even a tiny formatting mistake can cause the server to ignore your request entirely:

• Check for typos in field names (e.g., Command instead of command — JSON is case-sensitive!).
• Confirm all required parameters are included. For example, if subscribing to a ticker channel, make sure you’re passing the correct product or channel values as specified in the docs.
• Test with a minimal, valid command first. For example, try sending a simple ping command (if the docs mention one) like:

  {"command": "ping", "id": 1}
  

  If you still get nothing back, the issue is likely not with your command format, but with the connection itself.

3. Rule Out Network & Environment Issues #

• Check your connection URL: Ensure you’re using the correct secure WebSocket protocol (wss:// instead of ws://). Most crypto exchanges now block unencrypted WebSocket connections, which could lead to truncated or empty responses.
• Test with a different network: Firewalls, proxies, or VPNs often interfere with WebSocket traffic. Try switching to a mobile hotspot or a different network to see if the empty byte strings disappear.
• Use a WebSocket testing tool: Tools like wscat (a command-line tool) can help you isolate the issue. Run wscat -c wss://api.coinfloor.co.uk/ (replace with the correct Coinfloor URL) and manually send a valid command to see if you get a response. If you do, the problem is with your client code; if not, it’s likely a network or API-side issue.

4. Enable Debug Logs for Your Client #

Turn on verbose logging in your WebSocket client to see what’s happening under the hood:

• For JavaScript’s ws library, set debug: true when creating the client to log frame details, handshake status, and error messages.
• For Python’s websockets library, use the standard logging module to enable debug-level logs. These logs will show you if the handshake succeeded (look for status code 101), if your frames are being sent correctly, and if the server is actually returning any data (even empty frames).

内容的提问来源于stack exchange，提问作者jsstuball