问题
As explained in the title, I am trying to use the libcurl C API to submit simple http query.
I am using windows as an OS, C++ as a language, Visual Studio 2008 as an IDE.
My code is quiet simple:
I initialize curl:
CURLcode init = curl_global_init(CURL_GLOBAL_ALL);
I initialize my handle:
CURL* handle = curl_easy_init();
I set the url:
CRULcode set_url = curl_easy_setopt(handle, CURLOPT_URL, "http://www.example.com")
I submit my request: CURLcode submit = curl_easy_perform(handle);
As a result, the init and set_url return codes are 0 (CURLE_OK), the subimt return code is 2 (CURLE_URL_MALFORMAT).
When I debug I realize that my URL got corrupted, and instead of being http://www.example.com it becomes: xj: in release mode and 0|: in debug mode.
It happens as soon as I enter curl_easy_setopt
The URL string gets definitely corrupted.
There must be one of my settings that is wrong, so here is a summary of my settings (in debug mode)
- Use MFC in a Shared DLL
- Use Multi-Byte Character Set
- preprocessor includes CURL_STATICLIB
- Multi-threaded Debug DLL /MDd
- Linking againgst libcurld.lib (version 7.21.3) compile using the vc6curl.dsw project
- also linking againgst ws2_32.lib wldap32.lib
回答1:
"Linking againgst libcurld.lib (version 7.21.3) compile using the vc6curl.dsw project"
This is the problem.
Static libraries must be built with the same compiler and the same runtime libraries (/MDd).
You can avoid this with DLL version of libcurl.
来源：https://stackoverflow.com/questions/4618101/using-libcurl-on-windows-in-my-c-project-with-visual-studio-does-not-work-b