7a83c56d3a
Out of the box, `curl` reports success (via exit code) even if the server returns an error, e.g. _429 Too Many Requests_ which was sometimes the case with `http://myip.dnsomatic.com`. So, errors went undetected. There is the `--fail` switch which enables us to use the exit code the way we need: > -f, --fail > (HTTP) Fail silently (no output at all) on server > errors. This is mostly done to better enable scripts etc > to better deal with failed attempts. In normal cases > when an HTTP server fails to deliver a document, it > returns an HTML document stating so (which often also > describes why and more). This flag will prevent curl > from outputting that and return error 22. Use it to make the `myip()` deliver results reliably. |
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