C++

PDF URL

#include <iostream>
#include <string>
#include <curl/curl.h>

size_t WriteCallback(void* contents, size_t size, size_t nmemb, std::string* s) {
    s->append((char*)contents, size * nmemb);
    return size * nmemb;
}

int main() {
    CURL* curl;
    CURLcode res;
    std::string readBuffer;

    curl = curl_easy_init();
    if(curl) {
        curl_easy_setopt(curl, CURLOPT_URL, "https://v1.mlapi.co/pdf/pdf-to-text");
        curl_easy_setopt(curl, CURLOPT_POSTFIELDS, "pdf_url=https://example.com/your-pdf.pdf&api_key=your_api_key");
        curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, WriteCallback);
        curl_easy_setopt(curl, CURLOPT_WRITEDATA, &readBuffer);
        res = curl_easy_perform(curl);
        if(res != CURLE_OK) {
            fprintf(stderr, "curl_easy_perform() failed: %s\n", curl_easy_strerror(res));
        } else {
            std::cout << readBuffer << std::endl;
        }
        curl_easy_cleanup(curl);
    }
    return 0;
}

Upload PDF file

#include <iostream>
#include <fstream>
#include <curl/curl.h>

size_t WriteCallback(void* contents, size_t size, size_t nmemb, std::string* s) {
    s->append((char*)contents, size * nmemb);
    return size * nmemb;
}

int main() {
    CURL* curl;
    CURLcode res;
    std::string readBuffer;

    curl = curl_easy_init();
    if(curl) {
        curl_easy_setopt(curl, CURLOPT_URL, "https://v1.mlapi.co/pdf/pdf-to-text");
        curl_mime *form = curl_mime_init(curl);
        curl_mimepart *field = curl_mime_addpart(form);
        curl_mime_name(field, "file");
        curl_mime_filedata(field, "path/to/your-pdf.pdf");
        curl_mimepart *apiKeyField = curl_mime_addpart(form);
        curl_mime_name(apiKeyField, "api_key");
        curl_mime_data(apiKeyField, "your_api_key", CURL_ZERO_TERMINATED);
        curl_easy_setopt(curl, CURLOPT_MIMEPOST, form);
        curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, WriteCallback);
        curl_easy_setopt(curl, CURLOPT_WRITEDATA, &readBuffer);
        res = curl_easy_perform(curl);
        if(res != CURLE_OK) {
            fprintf(stderr, "curl_easy_perform() failed: %s\n", curl_easy_strerror(res));
        } else {
            std::cout << readBuffer << std::endl;
        }
        curl_mime_free(form);
        curl_easy_cleanup(curl);
    }
    return 0;
}