68 lines
1.4 KiB
C
68 lines
1.4 KiB
C
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#include <curl/curl.h>
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#include <curl/easy.h>
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#include <stdlib.h>
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#include <string.h>
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#include "curl.h"
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#define BASE_URL_SIZE 38
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void init_string(string* s)
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{
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s->len = 0;
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s->buf = malloc(s->len + 1);
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if (NULL == s->buf) {
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fprintf(stderr, "malloc() failed!\n");
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exit(EXIT_FAILURE);
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}
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s->buf[0] = '\0';
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}
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size_t writefunc(void* ptr, size_t size, size_t nmemb, string* s)
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{
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size_t new_len = s->len + (size * nmemb);
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s->buf = realloc(s->buf, new_len + 1);
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if (NULL == s->buf) {
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fprintf(stderr, "realloc() failed!\n");
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exit(EXIT_FAILURE);
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}
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memcpy(s->buf + s->len, ptr, size * nmemb);
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s->buf[new_len] = '\0';
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s->len = new_len;
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return size * nmemb;
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}
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CURLcode perform_book_get(char* isbn, string* s)
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{
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CURL* handler;
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char* base_url;
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size_t finalurl_size = BASE_URL_SIZE + 15;
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char finalurl[finalurl_size];
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CURLcode result;
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handler = curl_easy_init();
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if (!handler) {
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fprintf(stderr, "cURL failed to initialize!\n");
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exit(EXIT_FAILURE);
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}
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base_url = "https://openlibrary.org/search.json?q=";
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// Setup the URL for the request
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snprintf(finalurl, finalurl_size, "%s%s", base_url, isbn);
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curl_easy_setopt(handler, CURLOPT_URL, finalurl);
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curl_easy_setopt(handler, CURLOPT_HTTPGET, 1L);
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curl_easy_setopt(handler, CURLOPT_WRITEFUNCTION, writefunc);
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curl_easy_setopt(handler, CURLOPT_WRITEDATA, s);
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result = curl_easy_perform(handler);
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// Always clean up
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curl_easy_cleanup(handler);
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return result;
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}
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