diff options
Diffstat (limited to 'src/modify-caldav-object.c')
| -rw-r--r-- | src/modify-caldav-object.c | 555 |
1 files changed, 555 insertions, 0 deletions
diff --git a/src/modify-caldav-object.c b/src/modify-caldav-object.c new file mode 100644 index 0000000..fb3a4d0 --- /dev/null +++ b/src/modify-caldav-object.c @@ -0,0 +1,555 @@ +/* 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 first part of the calendar query. + * The actual UID to use for the query is added at runtime. + */ +static char* search_tasks_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=\"VTODO\">" +" <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:"); + http_header = curl_slist_append(http_header, "Connection: close"); + 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:"); + http_header = curl_slist_append(http_header, "Connection: close"); + 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; +} + +/** + * Function for modifying a task. + * @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_tasks_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:"); + http_header = curl_slist_append(http_header, "Connection: close"); + 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_tasks_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:"); + http_header = curl_slist_append(http_header, "Connection: close"); + 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; +} + |