Write C/C++ code to login AliExpress relaying on libcurl

We already have a libcurl based program fetching AliExpress products, but sometime AE returns the login page rather than the product one. So, we need relevant code to sign in, providing what happen from login page (i.e. headers, cookies, POST fields, I guess). Subsequent requests to fetch product pages will have to stay in the same session from the point of view of AliExpress (same libcurl handle, maybe some response cookies to send back). To be sure AliExpress connection remains stable through libcurl requests, after one login, the program should be able to fetch, say, 10 different product pages successfully. The program can be written in pure C, C++ or a mixed style, doesn't matter. But it has to work consistently from the same IP address (i.e. not going through proxy). Ideally, it should compile against GCC or clang, but if you use another compiler, we'll be able to adjust. If we can't compile out-of-the box, you'll simply have to provide us a working executable for Windows or Mac. Of course, you should have previous experience dealing with AliExpress in code to be able to deliver a working code in the best delay. We can communicate in English and French by writing, but in French only about speaking.