cloud.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <curl/curl.h>
#include "prototype.h"
#include <unistd.h>      // For access()
#include <json-c/json.h> // JSON parsing library (install libjson-c-dev)

#define URL "https://api.pdfrest.com/upload"
#define API_KEY "dce9867b-1889-4465-8569-b7b21231dde7" // Your API Key

// Callback function to capture response data
size_t writeCallback(char *ptr, size_t size, size_t nmemb, void *userdata)
{
    strncat((char *)userdata, ptr, size * nmemb);
    return size * nmemb;
}

// Function to handle the cloud upload
int uploadFileToCloud(const char *filePath, char *response)
{
    if (access(filePath, F_OK) == -1)
    {
        perror("File not found or inaccessible");
        return 1;
    }

    CURL *curl;
    CURLcode res;
    struct curl_slist *headers = NULL;
    curl_mime *mime;
    curl_mimepart *part;

    // Initialize libcurl
    curl_global_init(CURL_GLOBAL_DEFAULT);
    curl = curl_easy_init();

    if (curl)
    {
        // Set the URL for the POST request
        curl_easy_setopt(curl, CURLOPT_URL, URL);

        // Set the headers
        headers = curl_slist_append(headers, "Accept: application/json");
        headers = curl_slist_append(headers, "Content-Type: multipart/form-data");
        headers = curl_slist_append(headers, "Api-Key: " API_KEY);
        curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);

        // Create the MIME object for file upload
        mime = curl_mime_init(curl);

        // Create the file part of the multipart form-data
        part = curl_mime_addpart(mime);
        curl_mime_name(part, "file");
        curl_mime_filedata(part, filePath);
        curl_mime_type(part, "application/octet-stream");

        // Set the POST data to the mime object
        curl_easy_setopt(curl, CURLOPT_MIMEPOST, mime);

        // Set the write callback for capturing response
        curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, writeCallback);
        curl_easy_setopt(curl, CURLOPT_WRITEDATA, response);

        // Perform the file upload
        res = curl_easy_perform(curl);

        if (res != CURLE_OK)
        {
            fprintf(stderr, "File upload failed: %s\n", curl_easy_strerror(res));
        }
        else
        {
            printf("File uploaded successfully.\n");
            printf("Response: %s\n", response);

            // Parse the JSON response to extract the file ID
            struct json_object *parsed_json, *files, *file, *id;
            parsed_json = json_tokener_parse(response);
            if (json_object_object_get_ex(parsed_json, "files", &files))
            {
                file = json_object_array_get_idx(files, 0);
                if (json_object_object_get_ex(file, "id", &id))
                {
                    const char *fileId = json_object_get_string(id);
                    // printf("File ID: %s\n", fileId);

                    // Construct the URL
                    char fileUrl[512];
                    snprintf(fileUrl, sizeof(fileUrl), "https://api.pdfrest.com/resource/%s?format=file", fileId);
                    // printf("Download URL: %s\n", fileUrl);
                }
            }
            else
            {
                fprintf(stderr, "Failed to parse response JSON.\n");
            }
        }

        // Cleanup
        curl_mime_free(mime);
        curl_slist_free_all(headers);
        curl_easy_cleanup(curl);
    }

    curl_global_cleanup();
    return 0;
}