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Diffstat (limited to 'src/.svn/text-base/modify-caldav-object.c.svn-base')
-rw-r--r--src/.svn/text-base/modify-caldav-object.c.svn-base296
1 files changed, 296 insertions, 0 deletions
diff --git a/src/.svn/text-base/modify-caldav-object.c.svn-base b/src/.svn/text-base/modify-caldav-object.c.svn-base
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+/* 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 "modify-caldav-object.h"
+#include "lock-caldav-object.h"
+#include <glib.h>
+#include <curl/curl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+/**
+ * A static literal string containing the first part of the calendar query.
+ * The actual UID to use for the query is added at runtime.
+ */
+static char* search_head =
+"<?xml version=\"1.0\" encoding=\"utf-8\" ?>"
+"<C:calendar-query xmlns:D=\"DAV:\""
+" xmlns:C=\"urn:ietf:params:xml:ns:caldav\">"
+" <D:prop>"
+" <D:getetag/>"
+" <C:calendar-data/>"
+" </D:prop>"
+" <C:filter>"
+" <C:comp-filter name=\"VCALENDAR\">"
+" <C:comp-filter name=\"VEVENT\">"
+" <C:prop-filter name=\"UID\">";
+
+/**
+ * A static literal string containing the last part of the calendar query
+ */
+static char* search_tail =
+"</C:prop-filter>"
+" </C:comp-filter>"
+" </C:comp-filter>"
+" </C:filter>"
+"</C:calendar-query>";
+
+/**
+ * Function for modifying an event.
+ * @param settings A pointer to caldav_settings. @see caldav_settings
+ * @param error A pointer to caldav_error. @see caldav_error
+ * @return TRUE in case of error, FALSE otherwise.
+ */
+gboolean caldav_modify(caldav_settings* settings, caldav_error* error) {
+ CURL* curl;
+ CURLcode res = 0;
+ char error_buf[CURL_ERROR_SIZE];
+ struct config_data data;
+ struct MemoryStruct chunk;
+ struct MemoryStruct headers;
+ struct curl_slist *http_header = NULL;
+ gchar* search;
+ gchar* uid;
+ gboolean result = FALSE;
+ gboolean LOCKSUPPORT = FALSE;
+ gchar* lock_token = NULL;
+
+ chunk.memory = NULL; /* we expect realloc(NULL, size) to work */
+ chunk.size = 0; /* no data at this point */
+ headers.memory = NULL;
+ headers.size = 0;
+
+ curl = get_curl(settings);
+ if (!curl) {
+ error->code = -1;
+ error->str = g_strdup("Could not initialize libcurl");
+ g_free(settings->file);
+ settings->file = NULL;
+ return TRUE;
+ }
+
+ http_header = curl_slist_append(http_header,
+ "Content-Type: application/xml; charset=\"utf-8\"");
+ http_header = curl_slist_append(http_header, "Depth: 1");
+ http_header = curl_slist_append(http_header, "Expect:");
+ http_header = curl_slist_append(http_header, "Transfer-Encoding:");
+ data.trace_ascii = settings->trace_ascii;
+ curl_easy_setopt(curl, CURLOPT_HTTPHEADER, http_header);
+ /* 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 'headers' struct to the callback function */
+ curl_easy_setopt(curl, CURLOPT_WRITEHEADER, (void *)&headers);
+ curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, (char *) &error_buf);
+ if (settings->debug) {
+ curl_easy_setopt(curl, CURLOPT_DEBUGFUNCTION, my_trace);
+ curl_easy_setopt(curl, CURLOPT_DEBUGDATA, &data);
+ curl_easy_setopt(curl, CURLOPT_VERBOSE, 1);
+ }
+ gchar* file = g_strdup(settings->file);
+ if ((uid = get_response_header("uid", file, FALSE)) == NULL) {
+ g_free(file);
+ error->code = 1;
+ error->str = g_strdup("Error: Missing required UID for object");
+ return TRUE;
+ }
+ g_free(file);
+ /*
+ * collation is not supported by ICalendar.
+ * <C:text-match collation=\"i;ascii-casemap\">%s</C:text-match>
+ */
+ search = g_strdup_printf(
+ "%s\r\n<C:text-match>%s</C:text-match>\r\n%s",
+ search_head, uid, search_tail);
+ g_free(uid);
+ /* enable uploading */
+ curl_easy_setopt(curl, CURLOPT_POSTFIELDS, search);
+ curl_easy_setopt (curl, CURLOPT_POSTFIELDSIZE, strlen(search));
+ curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, "REPORT");
+ 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);
+ curl_slist_free_all(http_header);
+ http_header = NULL;
+ g_free(search);
+ if (res != 0) {
+ error->code = -1;
+ error->str = g_strdup_printf("%s", error_buf);
+ g_free(settings->file);
+ settings->file = NULL;
+ result = TRUE;
+ }
+ else {
+ long code;
+ res = curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &code);
+ if (code != 207) {
+ error->code = code;
+ error->str = g_strdup(chunk.memory);
+ result = TRUE;
+ }
+ else {
+ /* enable uploading */
+ gchar* url = NULL;
+ gchar* etag = NULL;
+ url = get_url(chunk.memory);
+ if (url) {
+ etag = get_etag(chunk.memory);
+ if (etag) {
+ gchar* host = get_host(settings->url);
+ if (host) {
+ file = g_strdup(url);
+ g_free(url);
+ url = g_strdup_printf("%s%s", host, file);
+ g_free(file);
+ g_free(host);
+ }
+ else {
+ g_free(etag);
+ g_free(url);
+ url = NULL;
+ }
+ }
+ else {
+ g_free(url);
+ url = NULL;
+ }
+ if (url) {
+ int lock = 0;
+ caldav_error lock_error;
+
+ file = g_strdup(etag);
+ g_free(etag);
+ etag = g_strdup_printf("If-Match: %s", file);
+ g_free(file);
+ http_header = curl_slist_append(http_header, etag);
+ g_free(etag);
+ http_header = curl_slist_append(http_header,
+ "Content-Type: text/calendar; charset=\"utf-8\"");
+ http_header = curl_slist_append(http_header, "Expect:");
+ http_header = curl_slist_append(
+ http_header, "Transfer-Encoding:");
+ if (settings->use_locking)
+ LOCKSUPPORT = caldav_lock_support(settings, &lock_error);
+ else
+ LOCKSUPPORT = FALSE;
+ if (LOCKSUPPORT) {
+ lock_token = caldav_lock_object(url, settings, &lock_error);
+ if (lock_token) {
+ http_header = curl_slist_append(
+ http_header, g_strdup_printf(
+ "If: (%s)", lock_token));
+ }
+ /*
+ * If error code is 423 (Resource is LOCKED) bail out
+ */
+ else if (lock_error.code == 423) {
+ lock = -1;
+ }
+ /*
+ * If error code is 501 (Not implemented) we continue
+ * hoping for the best.
+ */
+ else if (lock_error.code == 501) {
+ lock_token = g_strdup("");
+ }
+ else {
+ lock = -1;
+ }
+ }
+ if (! LOCKSUPPORT || (LOCKSUPPORT && lock_token && lock_error.code != 423)) {
+ curl_easy_setopt(curl, CURLOPT_HTTPHEADER, http_header);
+ curl_easy_setopt(curl, CURLOPT_URL, rebuild_url(settings, url));
+ curl_easy_setopt(curl, CURLOPT_POSTFIELDS, settings->file);
+ curl_easy_setopt (curl, CURLOPT_POSTFIELDSIZE,
+ strlen(settings->file));
+ 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);
+ curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, "PUT");
+ res = curl_easy_perform(curl);
+ if (LOCKSUPPORT && lock_token) {
+ caldav_unlock_object(
+ lock_token, url, settings, &lock_error);
+ }
+ }
+ g_free(url);
+ g_free(lock_token);
+ if (res != 0 || lock < 0) {
+ /* Is this a lock_error don't change error*/
+ if (lock == 0 || lock_error.code == 423) {
+ error->code = code;
+ error->str = g_strdup(chunk.memory);
+ }
+ else {
+ error->code = lock_error.code;
+ error->str = g_strdup(lock_error.str);
+ }
+ result = TRUE;
+ g_free(settings->file);
+ settings->file = NULL;
+ }
+ else {
+ long code;
+ res = curl_easy_getinfo(
+ curl, CURLINFO_RESPONSE_CODE, &code);
+ if (code != 204) {
+ error->code = code;
+ error->str = g_strdup(chunk.memory);
+ result = TRUE;
+ }
+ }
+ curl_slist_free_all(http_header);
+ }
+ else {
+ error->code = code;
+ if (chunk.memory)
+ error->str = g_strdup(chunk.memory);
+ else
+ error->str = g_strdup("No object found");
+ result = TRUE;
+ }
+ }
+ else {
+ /*
+ * No object found on server. Posible synchronization
+ * problem or a server side race condition
+ */
+ error->code = 409;
+ error->str = g_strdup("No object found");
+ result = TRUE;
+ }
+ }
+ }
+ if (chunk.memory)
+ free(chunk.memory);
+ if (headers.memory)
+ free(headers.memory);
+ curl_easy_cleanup(curl);
+ return result;
+}
+
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