allow record expiration to be disabled

src/main.c

@@ -36,7 +36,7 @@ void usage(){
     "\t-w, --workers\t- how many background workers to spawn [default: 10]\r\n"
     "\t-u, --url\t- which url to proxy requests to [default: http://127.0.0.1:8000]\r\n"
     "\t-c, --cache\t- kyoto cabinet cache to use [default: \"*\"]\r\n"
-    "\t-e, --expire\t- the expiration time in seconds from when a record is cached [default:3600]\r\n"
+    "\t-e, --expire\t- the expiration time in seconds from when a record is cached, 0 to disable [default:3600]\r\n"
     "\t-h, --help\t- display this message\r\n";
   printf("%s", usage_str);
 }

src/proxy.c

@@ -39,8 +39,11 @@ void* call_proxy(void* arg){
     curl_easy_setopt(curl, CURLOPT_WRITEDATA, result);
     res = curl_easy_perform(curl);
     char value[1024];
-    int now = (int)time(NULL);
-    sprintf(value, "%10d:%s", now + record_expire_time, result->data);
+    int exp = 0;
+    if(record_expire_time > 0){
+      exp = (int)time(NULL) + record_expire_time;
+    }
+    sprintf(value, "%10d:%s", exp, result->data);
     kcdbset(db, next, strlen(next), value, strlen(value));
 
     if(url != NULL){