HTTP status codes are grouped into various categories, such as Informational (1xx), Successful (2xx), Redirection (3xx), Client Errors (4xx), and Server Errors (5xx). Below is a breakdown of status codes that are commonly encountered during data fetching or processing errors.
1xx: Informational
1xx status codes indicate that a request has been received and the process is continuing. However, these are rarely associated with errors.
| Code | Message | Description |
|---|---|---|
| 100 | Continue | The server has received the request headers, and the client can proceed to send the body. |
| 101 | Switching Protocols | The server is switching protocols as requested by the client, e.g., to WebSockets. |
2xx: Successful
2xx codes signify that the request was successfully received, understood, and accepted.
| Code | Message | Description |
|---|---|---|
| 200 | OK | The request was successful, and the server returned the requested data. |
| 201 | Created | A new resource was successfully created as a result of the request. |
| 204 | No Content | The request was successfully processed, but no content is returned. |
3xx: Redirection
3xx codes indicate that the client must take additional action to complete the request, such as following a redirection.
| Code | Message | Description |
|---|---|---|
| 301 | Moved Permanently | The requested resource has been permanently moved to a new URI. |
| 302 | Found | The resource is temporarily located at a different URI. |
| 303 | See Other | The client should retrieve the resource using a different URI. |
| 304 | Not Modified | The resource has not been modified; use the cached version. |
4xx: Client Errors
4xx codes indicate that there was an error with the client's request.
| Code | Message | Description |
|---|---|---|
| 400 | Bad Request | The server could not understand the request due to malformed syntax. |
| 401 | Unauthorized | The client must authenticate to access the resource. |
| 403 | Forbidden | The server is refusing to process the request, even with valid credentials. |
| 404 | Not Found | The requested resource could not be found on the server. |
| 405 | Method Not Allowed | The request method is not supported for the requested resource. |
| 408 | Request Timeout | The server timed out waiting for the client's request. |
| 409 | Conflict | The request could not be processed due to a conflict in the request. |
| 413 | Payload Too Large | The request payload is larger than the server is willing to process. |
| 414 | URI Too Long | The request URI is too long for the server to handle. |
| 429 | Too Many Requests | The client has sent too many requests in a given period. |
5xx: Server Errors
5xx codes indicate that the server encountered an error while processing the request.
| Code | Message | Description |
|---|---|---|
| 500 | Internal Server Error | A generic error occurred on the server. |
| 501 | Not Implemented | The server does not support the functionality required to fulfill the request. |
| 502 | Bad Gateway | The server received an invalid response from an upstream server. |
| 503 | Service Unavailable | The server is currently unable to handle the request due to overload or maintenance. |
| 504 | Gateway Timeout | The server acting as a gateway timed out while waiting for a response. |
| 507 | Insufficient Storage | The server is unable to store the representation needed to complete the request. |
| 511 | Network Authentication Required | The client must authenticate to gain network access. |
Summary of Relevant Codes
Here is a quick summary of key codes relevant to data fetching and processing:
| Code | Meaning | Possible Cause |
|---|---|---|
| 400 | Bad Request | Malformed request or invalid input. |
| 401 | Unauthorized | Missing or invalid authentication. |
| 403 | Forbidden | Access denied despite valid authentication. |
| 404 | Not Found | The requested resource does not exist. |
| 408 | Request Timeout | The client took too long to send a request. |
| 500 | Internal Server Error | An unexpected error occurred on the server. |
| 502 | Bad Gateway | Invalid response from an upstream server. |
| 503 | Service Unavailable | The server is overloaded or down for maintenance. |
| 504 | Gateway Timeout | Backend service timed out. |
| 507 | Insufficient Storage | Not enough storage on the server. |
| 511 | Network Authentication Required | Client must authenticate for network access. |
Top comments (0)