HTTP 444 Connection: Close Error - Causes & Resolution
The HTTP 444 Connection: Close error indicates that nginx terminated the connection without sending a response. In web scraping, this can occur when the server silently rejects requests, often due to anti-bot measures. To resolve this, adjust request headers, use proxies, or mimic human-like behavior.
What induces the error?
Malformed request syntax that nginx cannot parse or process.
Requests that fail to meet specific security rules set in nginx configurations.
Suspicious patterns in requests that suggest potential security threats like SQL injection or cross-site scripting.
Excessive request rate (rate limiting) that triggers nginx to drop further requests from a client.
# Request example curl -X GET https://sandbox.oxylabs.io/ -H 'Accept: text/html' -H 'Accept-Encoding: gzip, deflate' -H 'User-Agent: Mozilla/5.0'
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Common solutions
Review the API documentation to identify all required precondition headers for your request.
Match header with the correct entity tag (ETag) in your request to ensure data consistency.
Ensure that all headers are correctly formatted and values are properly quoted as per the HTTP specification.
Use tools like Postman or cURL to test and verify that the headers are being sent correctly in your requests.
# Response example HTTP/1.1 444 Connection Closed Connection: close Content-Length: 0
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