1 files changed, 135 insertions, 0 deletions
diff --git a/src/options-caldav-server.c b/src/options-caldav-server.c
new file mode 100644
index 0000000..1d97d04
--- /dev/null
+++ b/src/options-caldav-server.c
@@ -0,0 +1,135 @@
+/* vim: set textwidth=80 tabstop=4: */
+
+/* Copyright (c) 2008 Michael Rasmussen (mir@datanom.net)
+ *
+ * This program 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 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#  include "config.h"
+#endif
+
+#include "options-caldav-server.h"
+#include <glib.h>
+#include <curl/curl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+/**
+ * Function for getting supported options from a server.
+ * @param curl A pointer to an initialized CURL instance
+ * @param settings struct containing the URL to the server. If authentication
+ * is required prior to making the call the credentials must be available
+ * via CURLOPT_USERPWD before calling.
+ * @param result A pointer to a struct _response. If test is true
+ * this variable can be NULL. Caller is responsible for freeing associated
+ * memory.
+ * @param error A pointer to caldav_error. @see caldav_error
+ * @param test if this is true response will be whether the server
+ * represented by the URL is a CalDAV collection or not.
+ * @return FALSE in case of error, TRUE otherwise.
+ */
+gboolean caldav_getoptions(CURL* curl, caldav_settings* settings, response* result,
+		caldav_error* error, gboolean test) {
+	CURLcode res = 0;
+	char error_buf[CURL_ERROR_SIZE];
+	struct MemoryStruct chunk;
+	struct MemoryStruct headers;
+	gboolean enabled = FALSE;
+
+	if (! curl)
+		return FALSE;
+
+	if (!error) {
+		error = (caldav_error *) malloc(sizeof(struct _caldav_error));
+		memset(error, '\0', sizeof(struct _caldav_error));
+	}
+	chunk.memory = NULL; /* we expect realloc(NULL, size) to work */
+	chunk.size = 0;    /* no data at this point */
+	headers.memory = NULL;
+	headers.size = 0;
+
+	/* send all data to this function  */
+	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, WriteMemoryCallback);
+	/* we pass our 'chunk' struct to the callback function */
+	curl_easy_setopt(curl, CURLOPT_WRITEDATA, (void *)&chunk);
+	/* send all data to this function  */
+	curl_easy_setopt(curl, CURLOPT_HEADERFUNCTION, WriteHeaderCallback);
+	/* we pass our 'chunk' struct to the callback function */
+	curl_easy_setopt(curl, CURLOPT_WRITEHEADER, (void *)&headers);
+	curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, (char *) &error_buf);
+	curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, "OPTIONS");
+	curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1);
+	curl_easy_setopt(curl, CURLOPT_UNRESTRICTED_AUTH, 1);
+	curl_easy_setopt(curl, CURLOPT_POSTREDIR, CURL_REDIR_POST_ALL);
+	res = curl_easy_perform(curl);
+	if (res == 0) {
+		gchar* head;
+		head = get_response_header("DAV", headers.memory, TRUE);
+		if (head && strstr(head, "calendar-access") != NULL) {
+			enabled = TRUE;
+			if (! test) {
+				result->msg = g_strdup(
+						get_response_header("Allow", headers.memory, FALSE));
+			}
+		}
+		else {
+			long code;
+			res = curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &code);
+			if (code == 200) {
+				error->code = -1;
+				error->str = g_strdup("URL is not a CalDAV resource");
+			}
+			else {
+				error->code = -1 * code;
+				error->str = g_strdup(headers.memory);
+			}
+		}
+		g_free(head);
+	}
+	else if (
+		(res == CURLE_SSL_CONNECT_ERROR ||
+		 CURLE_PEER_FAILED_VERIFICATION ||
+		 CURLE_SSL_ENGINE_NOTFOUND ||
+		 CURLE_SSL_ENGINE_SETFAILED ||
+		 CURLE_SSL_CERTPROBLEM ||
+		 CURLE_SSL_CIPHER ||
+		 CURLE_SSL_CACERT ||
+		 CURLE_SSL_CACERT_BADFILE ||
+		 CURLE_SSL_CRL_BADFILE ||
+		 CURLE_SSL_ISSUER_ERROR) && settings->usehttps) {
+		error->code = -2;
+		error->str = g_strdup(error_buf);
+	}
+	else if (res == CURLE_COULDNT_RESOLVE_HOST) {
+		error->code = -3;
+		error->str = g_strdup("Could not resolve host");
+	}
+	else if (res == CURLE_COULDNT_CONNECT) {
+		error->code = -4;
+		error->str = g_strdup("Unable to connect");
+	}
+	else {
+		error->code = -1;
+		error->str = g_strdup("URL is not a CalDAV resource");
+	}
+	if (chunk.memory)
+		free(chunk.memory);
+	if (headers.memory)
+		free(headers.memory);
+	curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, "GET");
+	return enabled;
+}