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Mastering Internet of Things by Peter Waher

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Understanding status codes

All requests in HTTP return a response. The response begins with a status code, followed by a set of HTTP headers, followed by optional content. First, the status code needs to be understood. The code is first divided into sections:

Range

Meaning

1xx

Informational response. The request is acknowledged, and processing continues. This is used when dividing a Request/Response into more than one.

2xx

Success response. The request has been received, understood, and accepted.

3xx

Redirection response. The client is requested to redirect the original request to a new source.

4xx

Client error. The client has done something wrong.

5xx

Server error. The server has done something wrong. ...

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