skeleton for libtalerauditor

1 files changed, 74 insertions, 0 deletions

diff --git a/src/auditor-lib/curl_defaults.c b/src/auditor-lib/curl_defaults.c
new file mode 100644
index 000000000..8117fc444
--- /dev/null
+++ b/src/auditor-lib/curl_defaults.c
@@ -0,0 +1,74 @@
+/*
+  This file is part of TALER
+  Copyright (C) 2014-2018 GNUnet e.V.
+
+  TALER is free software; you can redistribute it and/or modify it under the
+  terms of the GNU General Public License as published by the Free Software
+  Foundation; either version 3, or (at your option) any later version.
+
+  TALER is distributed in the hope that it will be useful, but WITHOUT ANY
+  WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+  A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License along with
+  TALER; see the file COPYING.  If not, see
+  <http://www.gnu.org/licenses/>
+*/
+/**
+ * @file auditor-lib/curl_defaults.c
+ * @brief curl easy handle defaults
+ * @author Florian Dold
+ */
+
+#include "curl_defaults.h"
+
+
+/**
+ * Get a curl handle with the right defaults
+ * for the exchange lib.  In the future, we might manage a pool of connections here.
+ *
+ * @param url URL to query
+ */
+CURL *
+TEL_curl_easy_get (char *url)
+{
+  CURL *eh;
+  
+  eh = curl_easy_init ();
+
+  GNUNET_assert (CURLE_OK ==
+                 curl_easy_setopt (eh,
+                                   CURLOPT_URL,
+                                   url));
+  GNUNET_assert (CURLE_OK ==
+                 curl_easy_setopt (eh,
+                                   CURLOPT_ENCODING,
+                                   "deflate"));
+  GNUNET_assert (CURLE_OK ==
+                 curl_easy_setopt (eh,
+                                   CURLOPT_TCP_FASTOPEN,
+                                   1L));
+
+  {
+    /* Unfortunately libcurl needs chunk to be alive until after
+    curl_easy_perform.  To avoid manual cleanup, we keep
+    one static list here.  */
+    static struct curl_slist *chunk = NULL;
+    if (NULL == chunk)
+    {
+      /* With POST requests, we do not want to wait for the
+      "100 Continue" response, as our request bodies are usually
+      small and directy sending them saves us a round trip.
+
+      Clearing the expect header like this disables libcurl's
+      default processing of the header.
+
+      Disabling this header is safe for other HTTP methods, thus
+      we don't distinguish further before setting it.  */
+      chunk = curl_slist_append (chunk, "Expect:");
+    }
+    GNUNET_assert (CURLE_OK == curl_easy_setopt (eh, CURLOPT_HTTPHEADER, chunk));
+  }
+
+  return eh;
+}