Linearize a PDF File in C/C++

Looking to optimize large PDF files for streaming download? Today’s tutorial will highlight an API solution that can be used in C/C++ to linearize the content of a PDF, enabling you to say goodbye to unproductive wait times and view the document while it is still downloading.

The first step is to install libcurl in your C/C++ project:

libcurl/7.75.0

Then, you can call the 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, "https://api.cloudmersive.com/convert/edit/pdf/optimize/linearize");
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);
curl_mime_free(mime);
}
curl_easy_cleanup(curl);

The only other parameter you need besides the target PDF file is a personal API key; this can be retrieved by registering for a free account on the Cloudmersive website.