I'm sending an incorrect URL to a POST request via libcurl in C code. The server sends back a 400 along with a response containing detailed information about why the request was rejected. in libcurl i can see the error code:
res CURLcode CURLE_HTTP_RETURNED_ERROR
i can also see protocol error via:
char errbuf[CURL_ERROR_SIZE];
errbuf[0] = 0;
curl_easy_setopt(vc->curl, CURLOPT_ERRORBUFFER, errbuf);
/* Perform the request, resCode will get the return code */
CURLcode resCode = curl_easy_perform(vc->curl);
errbuf char [256] "The requested URL returned error: 400 Bad Request"
what i would really like to access is the body of the response. the server puts detailed error information there about why it rejected the request:
[
{
"code": "io.myorg.bad.request",
"message": "Unrecognized query parameter 'count' with value: true.",
"params": []
}
]
i have read and write callback functions set via:
/* ask curl to let us know if we get a 400 or higher */
curl_easy_setopt(vc->curl, CURLOPT_FAILONERROR, 1L);
curl_easy_setopt(vc->curl, CURLOPT_HTTPHEADER, vc->slist);
/* we want to use our own read/write function */
curl_easy_setopt(vc->curl, CURLOPT_READFUNCTION, read_callback);
curl_easy_setopt(vc->curl, CURLOPT_WRITEFUNCTION, write_callback);
/* pointer to pass to our callback functions */
curl_easy_setopt(vc->curl, CURLOPT_READDATA, vc);
curl_easy_setopt(vc->curl, CURLOPT_WRITEDATA, vc);
they are not called in this case. how do i get at the json in the response message?
