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-rw-r--r--src/lib/exchange_api_curl_defaults.c75
1 files changed, 75 insertions, 0 deletions
diff --git a/src/lib/exchange_api_curl_defaults.c b/src/lib/exchange_api_curl_defaults.c
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index 000000000..45aa36b9f
--- /dev/null
+++ b/src/lib/exchange_api_curl_defaults.c
@@ -0,0 +1,75 @@
+/*
+ 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 lib/exchange_api_curl_defaults.c
+ * @brief curl easy handle defaults
+ * @author Florian Dold
+ */
+
+#include "exchange_api_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 (const 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"));
+#ifdef CURLOPT_TCP_FASTOPEN
+ GNUNET_assert (CURLE_OK ==
+ curl_easy_setopt (eh,
+ CURLOPT_TCP_FASTOPEN,
+ 1L));
+#endif
+ {
+ /* 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;
+}