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// Written by retoor@molodetz.nl
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// This code defines a simple HTTP client using libcurl in C. It provides
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// functions for executing POST and GET HTTP requests with JSON data, including
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// authorization via a bearer token. The functions `curl_post` and `curl_get`
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// handle these operations and return the server's response as a string.
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// Uses libcurl for HTTP requests and includes a custom "auth.h" for API key
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// resolution.
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// MIT License
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions: the above copyright
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// notice and this permission notice shall be included in all copies or
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// substantial portions of the Software. The Software is provided "as is",
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// without warranty of any kind, express or implied, including but not limited
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// to the warranties of merchantability, fitness for a particular purpose and
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// noninfringement. In no event shall the authors or copyright holders be liable
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// for any claim, damages or other liability, whether in an action of contract,
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// tort or otherwise, arising from, out of or in connection with the software or
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// the use or other dealings in the Software.
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#ifndef HTTP_CURL
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#define HTTP_CURL
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#include "auth.h"
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#include <curl/curl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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struct ResponseBuffer {
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char *data;
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size_t size;
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};
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static size_t WriteCallback(void *contents, size_t size, size_t nmemb,
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void *userp) {
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size_t total_size = size * nmemb;
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struct ResponseBuffer *response = (struct ResponseBuffer *)userp;
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char *ptr = realloc(response->data, response->size + total_size + 1);
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if (ptr == NULL) {
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fprintf(stderr, "Failed to allocate memory for response\n");
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return 0;
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}
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response->data = ptr;
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memcpy(&(response->data[response->size]), contents, total_size);
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response->size += total_size;
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response->data[response->size] = '\0';
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return total_size;
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}
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char *curl_post(const char *url, const char *data) {
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CURL *curl;
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CURLcode res;
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struct ResponseBuffer response = {malloc(1), 0};
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if (!response.data)
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return NULL;
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curl = curl_easy_init();
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if (curl) {
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struct curl_slist *headers = NULL;
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curl_easy_setopt(curl, CURLOPT_URL, url);
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headers = curl_slist_append(headers, "Content-Type: application/json");
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char bearer_header[1337];
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sprintf(bearer_header, "Authorization: Bearer %s", resolve_api_key());
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headers = curl_slist_append(headers, bearer_header);
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curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);
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curl_easy_setopt(curl, CURLOPT_POSTFIELDS, data);
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curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, WriteCallback);
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curl_easy_setopt(curl, CURLOPT_WRITEDATA, (void *)&response);
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res = curl_easy_perform(curl);
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if (res != CURLE_OK) {
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fprintf(stderr, "Url: %s\n",data);
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fprintf(stderr, "Data: %s\n",data);
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fprintf(stderr, "An error occurred: %s\n", curl_easy_strerror(res));
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}
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curl_slist_free_all(headers);
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curl_easy_cleanup(curl);
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return response.data;
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}
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return NULL;
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}
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char *curl_get(const char *url) {
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CURL *curl;
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CURLcode res;
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struct ResponseBuffer response = {malloc(1), 0};
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if (!response.data)
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return NULL;
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curl = curl_easy_init();
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if (curl) {
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struct curl_slist *headers = NULL;
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curl_easy_setopt(curl, CURLOPT_URL, url);
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headers = curl_slist_append(headers, "Content-Type: application/json");
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char bearer_header[1337];
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sprintf(bearer_header, "Authorization: Bearer %s", resolve_api_key());
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headers = curl_slist_append(headers, bearer_header);
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curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);
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curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, WriteCallback);
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curl_easy_setopt(curl, CURLOPT_WRITEDATA, (void *)&response);
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res = curl_easy_perform(curl);
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if (res != CURLE_OK) {
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fprintf(stderr, "An error occurred: %s\n", curl_easy_strerror(res));
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}
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curl_slist_free_all(headers);
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curl_easy_cleanup(curl);
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}
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return response.data;
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}
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#endif
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