#include #include #include #define TOKEN_URL "https://%s/oauth/access_token" #define TOKEN_URL_LEN strlen(TOKEN_URL) - strlen("%s") #define TOKEN_POST "client_id=%s&client_secret=%s&code=%s" #define TOKEN_POST_LEN strlen(TOKEN_POST) - strlen("%s") * 3 #define TOKEN_HEADER "X-Shopify-Access-Token: %s" #define TOKEN_HEADER_LEN strlen(TOKEN_HEADER) - strlen("%s") static size_t append(char *data, size_t size, size_t nmemb, char **res) { size_t realsize = size * nmemb; size_t res_len = *res ? strlen(*res) : 0; *res = realloc(*res, res_len + realsize + 1); strlcpy(&(*res)[res_len], data, realsize + 1); return realsize; } static inline void request_gettoken(const char *host, const char *key, const char *secret_key, const char *code, char **json) { CURL *curl = curl_easy_init(); char url[TOKEN_URL_LEN + strlen(host) + 1]; sprintf(url, TOKEN_URL, host); curl_easy_setopt(curl, CURLOPT_URL, url); char post[TOKEN_POST_LEN + strlen(key) + strlen(secret_key) + strlen(code) + 1]; sprintf(post, TOKEN_POST, key, secret_key, code); curl_easy_setopt(curl, CURLOPT_POSTFIELDS, post); curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, append); curl_easy_setopt(curl, CURLOPT_WRITEDATA, json); curl_easy_perform(curl); curl_easy_cleanup(curl); }