/posts.json implemented

src/e621.c

@@ -0,0 +1,97 @@
+// Includes
+#include <openssl/evp.h>
+#include <curl/curl.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include "e621.h"
+
+struct Memory {
+    char *data;
+    size_t size;
+};
+
+struct curl_slist *MakeHeaders(e6_auth_t auth) {
+    struct curl_slist *headers = NULL;
+
+    char auth_buf[256];
+    char base64_buf[128];
+    snprintf(auth_buf, sizeof(auth_buf), "%s:%s", auth.username, auth.api_key);
+    EVP_EncodeBlock((unsigned char*)base64_buf, (unsigned char*)auth_buf, strlen(auth_buf));
+    memset(auth_buf, 0, sizeof(auth_buf));
+    snprintf(auth_buf, sizeof(base64_buf), "Authorization: Basic %s", base64_buf);
+    headers = curl_slist_append(headers, auth_buf);
+
+    char user_agent_buf[256];
+    snprintf(user_agent_buf, sizeof(user_agent_buf), "User-Agent: %s/%f (by %s on e621)", auth.project_name, auth.project_ver, auth.username);
+    headers = curl_slist_append(headers, user_agent_buf);
+    
+    return headers;
+}
+
+static size_t WriteCallback(void *contents, size_t size, size_t nmemb, void *userdata)
+{
+    size_t total = size * nmemb;
+    struct Memory *mem = (struct Memory *)userdata;
+
+    char *ptr = realloc(mem->data, mem->size + total + 1);
+    if (!ptr)
+        return 0;
+
+    mem->data = ptr;
+    memcpy(&(mem->data[mem->size]), contents, total);
+    mem->size += total;
+    mem->data[mem->size] = '\0';
+
+    return total;
+}
+
+
+e6_post_t *E6List(e6_auth_t auth, char **tags, int tags_count, unsigned int page, unsigned int limit) {
+    CURL *curl = curl_easy_init();
+    CURLcode result;
+    struct Memory read_buffer;
+    read_buffer.data = malloc(1);
+    read_buffer.size = 0;
+
+    if (curl) {
+        char *url = (char *)malloc(E621_URL_BUF_SIZE);
+        strncpy(url, E621_HOST, E621_URL_BUF_SIZE);
+        strcat(url, "/posts.json?tags=");
+
+        for (int i = 0; i < tags_count; i++) {
+            char *tag = tags[i];
+            strncat(url, tag, strlen(tag));
+            strcat(url, "+");
+        }
+
+        char page_buf[15];
+        snprintf(page_buf, sizeof(page_buf), "&page=%d", page);
+        strncat(url, page_buf, strlen(page_buf));
+
+        char limit_buf[15];
+        snprintf(limit_buf, sizeof(limit_buf), "&limit=%d", limit);
+        strncat(url, limit_buf, strlen(limit_buf));
+
+        struct curl_slist *headers = MakeHeaders(auth);
+
+        curl_easy_setopt(curl, CURLOPT_URL, url);
+        curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, WriteCallback);
+        curl_easy_setopt(curl, CURLOPT_WRITEDATA, (void *)&read_buffer);
+        curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);
+        result = curl_easy_perform(curl);
+
+    } else {
+        fprintf(stderr, "Failed to initialize CURL");
+        exit(EXIT_FAILURE);
+    }
+
+    if (result != CURLE_OK) {
+        fprintf(stderr, "CURL error: %s", curl_easy_strerror(result));
+        return NULL;
+    }
+
+    // Temp (testing purposes)
+    printf(read_buffer.data);
+    return NULL;
+}

src/main.c

@@ -0,0 +1,9 @@
+#include "e621.h"
+#include "creds.h" // provides the API key and username
+
+int main(int argc, char *argv[]) {
+    e6_auth_t auth = { USERNAME, API_KEY, "c621", 0.1 };
+
+    E6List(auth, (char* []){ "order:score", "cat" }, 2, 1, 3);
+    return 0;
+}