first working fetch

asana/fetch.c

@@ -1,19 +1,75 @@
 #include "fetch.h"
 
-#include <stdbool.h>
 #include <curl/curl.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
 
-  CURL *curl;
+CURL *curl;
 
-bool asana_init() {
+char asana_auth_header_str[AUTH_HEADER_SIZE];
+struct curl_slist *asana_auth_header;
+
+bool asana_init(char *pat) {
   curl_global_init(CURL_GLOBAL_ALL);
   curl = curl_easy_init();
   if (!curl) return false;
 
+  snprintf(asana_auth_header_str, AUTH_HEADER_SIZE, "Authorization: Bearer %s", pat);
+  asana_auth_header = curl_slist_append(NULL, asana_auth_header_str);
+
+  if (!asana_auth_header) return false;
+
   return true;
 }
 
 void asana_cleanup() {
+  curl_slist_free_all(asana_auth_header);
+  curl_easy_cleanup(curl);
   curl_global_cleanup();
 }
 
+size_t asana_write_callback(void *contents, size_t size, size_t nmemb, void *resp) {
+  Response *response = (Response *)resp;
+
+  size_t realsize = size * nmemb;
+
+  char *body = realloc(response->body, response->len + realsize + 1);
+  response->body = body;
+  memcpy(&(response->body[response->len]), contents, realsize);
+  response->len += realsize;
+  response->body[response->len] = '\0';
+
+  return realsize;
+}
+
+Response *asana_fetch(char *path) {
+  char url[ASANA_URL_MAX_LENGTH];
+  snprintf(url, ASANA_URL_MAX_LENGTH, "https://app.asana.com/api/1.0/%s", path);
+  curl_easy_setopt(curl, CURLOPT_URL, url);
+
+  curl_easy_setopt(curl, CURLOPT_HTTPHEADER, asana_auth_header);
+
+  Response *response = calloc(sizeof(Response), 1);
+  response->body = calloc(sizeof(char), 1);
+
+  curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, asana_write_callback);
+  curl_easy_setopt(curl, CURLOPT_WRITEDATA, (void *)response);
+
+  CURLcode result;
+  result = curl_easy_perform(curl);
+  if (result == CURLE_OK) {
+    curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &(response->status));
+  } else {
+    response->status = 500;
+  }
+
+  return response;
+}
+
+void asana_free_response(Response *r) {
+  free(r->body);
+  free(r);
+}
+

asana/fetch.h

@@ -2,6 +2,17 @@
 #define ASANA_FETCH_H_
 
 #include <stdbool.h>
+#include <stdlib.h>
+
+#define AUTH_HEADER_SIZE 1024
+#define ASANA_URL_MAX_LENGTH 4096
+
+typedef struct Response {
+  int status;
+  size_t len;
+  char *body;
+} Response;
+
 
 /**
  * initialize libcurl
@@ -13,4 +24,14 @@ bool asana_init();
  */
 void asana_cleanup();
 
+/**
+ *
+ */
+Response *asana_fetch(char *path);
+
+/**
+ * Frees memory allocated for a Response
+ */
+void asana_free_response(Response *r);
+
 #endif // ASANA_FETCH_H_