On Tue, Jun 7, 2022 at 8:43 AM Daniel Stenberg <dan...@haxx.se> wrote:
> On Tue, 7 Jun 2022, Adam Light wrote: > > curl_easy_getinfo() is designed to bring you information about a previous > transfer and CURLINFO_EFFECTIVE_URL is one of those details. The > "effective > URL" used in the previous transfer. > > If you didn't do any transfer then you can't know what URL it would be! > > So, the fact that you actually get any content back at all before you have > performed any transfer I call just pure luck and a circumstance that I > consider an undocumented behavior. > > The docs for curl_easy_getinfo say "The data pointed-to will be filled in accordingly and can be relied upon only if the function returns CURLE_OK." However if I call curl_easy_getinfo after setting the URL (with either CURLOPT_URL or CURLOPT_CURLU) CURLE_OK is returned. So it seems that it's not possible to determine whether the effective URL returned by curl_easy_getinfo is actually valid. I had been using curl_easy_getinfo as a way to determine which URL would be used if I were to call curl_easy_perform(). If I set the URL using CURLOPT_URL then I can use curl_easy_getinfo() to get that information. However if I set the URL with CURLOPT_CURLU, I need to keep track of the URL myself, which is a lot more complicated, but possible. Thanks for your clarification Adam
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