HTTP 101 Switching Protocols vs 429 Too Many Requests
HTTP 101 (Switching Protocols) is a 1xx Informational response, while 429 (Too Many Requests) is a 4xx Client Error response. 101 indicates that the server understands the Upgrade header field request and indicates which protocol it is switching to. In contrast, 429 means that the user has sent too many requests in a given time (rate limiting). The response should include a Retry-After header.
説明
The server understands the Upgrade header field request and indicates which protocol it is switching to.
このコードが表示される場合
When upgrading from HTTP/1.1 to WebSocket, or to HTTP/2.
解決方法
This is normal behavior during protocol upgrades. Ensure your client supports the target protocol.
説明
The user has sent too many requests in a given time (rate limiting). The response should include a Retry-After header.
このコードが表示される場合
When hitting API rate limits or making too many requests too quickly.
解決方法
Check the Retry-After header. Implement exponential backoff. Consider caching responses.
主な違い
101 is a 1xx Informational response, while 429 is a 4xx Client Error response.
HTTP 101: The server understands the Upgrade header field request and indicates which protocol it is switching to.
HTTP 429: The user has sent too many requests in a given time (rate limiting). The response should include a Retry-After header.
You encounter 101 when when upgrading from HTTP/1.1 to WebSocket, or to HTTP/2.
You encounter 429 when when hitting API rate limits or making too many requests too quickly.
どちらをいつ使うか
For 101 (Switching Protocols): This is normal behavior during protocol upgrades. Ensure your client supports the target protocol. For 429 (Too Many Requests): Check the Retry-After header. Implement exponential backoff. Consider caching responses.