| Long: etag-compare |
| Arg: <file> |
| Help: Pass an ETag from a file as a custom header |
| Protocols: HTTP |
| Added: 7.68.0 |
| --- |
| This option makes a conditional HTTP request for the specific |
| ETag read from the given file by sending a custom If-None-Match |
| header using the extracted ETag. |
| |
| For correct results, make sure that specified file contains only a single |
| line with a desired ETag. An empty file is parsed as an empty ETag. |
| |
| Use the option --etag-save to first save the ETag from a response, and |
| then use this option to compare using the saved ETag in a subsequent request. |
| |
| \fCOMPARISON\fP: There are 2 types of comparison or ETags, Weak and Strong. |
| This option expects, and uses a strong comparison. |
