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/* 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;
}
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