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45 lines
2.3 KiB
Markdown
45 lines
2.3 KiB
Markdown
Error Handling
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==============
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When handling a RESTful API request, if there is an error in the user request or if something unexpected
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happens on the server, you may simply throw an exception to notify the user that something went wrong.
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If you can identify the cause of the error (e.g., the requested resource does not exist), you should
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consider throwing an exception along with a proper HTTP status code (e.g., [[yii\web\NotFoundHttpException]]
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represents a 404 status code). Yii will send the response along with the corresponding HTTP status
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code and text. Yii will also include the serialized representation of the
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exception in the response body. For example:
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```
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HTTP/1.1 404 Not Found
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Date: Sun, 02 Mar 2014 05:31:43 GMT
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Server: Apache/2.2.26 (Unix) DAV/2 PHP/5.4.20 mod_ssl/2.2.26 OpenSSL/0.9.8y
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Transfer-Encoding: chunked
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Content-Type: application/json; charset=UTF-8
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{
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"type": "yii\\web\\NotFoundHttpException",
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"name": "Not Found Exception",
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"message": "The requested resource was not found.",
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"code": 0,
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"status": 404
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}
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```
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The following list summarizes the HTTP status code that are used by the Yii REST framework:
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* `200`: OK. Everything worked as expected.
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* `201`: A resource was successfully created in response to a `POST` request. The `Location` header
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contains the URL pointing to the newly created resource.
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* `204`: The request was handled successfully and the response contains no body content (like a `DELETE` request).
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* `304`: The resource was not modified. You can use the cached version.
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* `400`: Bad request. This could be caused by various actions by the user, such as providing invalid JSON
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data in the request body, providing invalid action parameters, etc.
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* `401`: Authentication failed.
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* `403`: The authenticated user is not allowed to access the specified API endpoint.
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* `404`: The requested resource does not exist.
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* `405`: Method not allowed. Please check the `Allow` header for the allowed HTTP methods.
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* `415`: Unsupported media type. The requested content type or version number is invalid.
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* `422`: Data validation failed (in response to a `POST` request, for example). Please check the response body for detailed error messages.
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* `429`: Too many requests. The request was rejected due to rate limiting.
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* `500`: Internal server error. This could be caused by internal program errors.
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