Apr 16, 2021

2 min read

How to Validate a CSV in C/C++

Receiving an invalid CSV file error is something that none of us look forward to, and finding a solution for the error can be a real pain as well. Instead of attempting to code a validation system manually, which is a tedious task, we will be discussing how you can utilize an API in C/C++ to validate a CSV file and identify the errors if there any present.

To use this time-saving API, let’s install libcurl in our C/C++ project:


With the installation complete, we are ready to call the validation function with the following code:

CURL *curl;
CURLcode res;
curl = curl_easy_init();
if(curl) {
curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, "POST");
curl_easy_setopt(curl, CURLOPT_URL, "");
curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1L);
curl_easy_setopt(curl, CURLOPT_DEFAULT_PROTOCOL, "https");
struct curl_slist *headers = NULL;
headers = curl_slist_append(headers, "Content-Type: multipart/form-data");
headers = curl_slist_append(headers, "Apikey: YOUR-API-KEY-HERE");
curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);
curl_mime *mime;
curl_mimepart *part;
mime = curl_mime_init(curl);
part = curl_mime_addpart(mime);
curl_mime_name(part, "inputFile");
curl_mime_filedata(part, "/path/to/file");
curl_easy_setopt(curl, CURLOPT_MIMEPOST, mime);
res = curl_easy_perform(curl);

The process will return a wealth of information including the valid status, password protection status, warnings, and errors. Visit the Cloudmersive website to retrieve your free API key (if you don’t already have one) or contact our sales team with any questions you may have.