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555 lines
16 KiB
555 lines
16 KiB
/* Copyright (c) 2008 Michael Rasmussen (mir@datanom.net)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include "modify-caldav-object.h"
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#include "lock-caldav-object.h"
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#include <glib.h>
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#include <curl/curl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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/**
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* A static literal string containing the first part of the calendar query.
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* The actual UID to use for the query is added at runtime.
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*/
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static char* search_head =
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"<?xml version=\"1.0\" encoding=\"utf-8\" ?>"
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"<C:calendar-query xmlns:D=\"DAV:\""
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" xmlns:C=\"urn:ietf:params:xml:ns:caldav\">"
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" <D:prop>"
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" <D:getetag/>"
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" <C:calendar-data/>"
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" </D:prop>"
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" <C:filter>"
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" <C:comp-filter name=\"VCALENDAR\">"
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" <C:comp-filter name=\"VEVENT\">"
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" <C:prop-filter name=\"UID\">";
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/**
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* A static literal string containing the first part of the calendar query.
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* The actual UID to use for the query is added at runtime.
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*/
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static char* search_tasks_head =
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"<?xml version=\"1.0\" encoding=\"utf-8\" ?>"
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"<C:calendar-query xmlns:D=\"DAV:\""
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" xmlns:C=\"urn:ietf:params:xml:ns:caldav\">"
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" <D:prop>"
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" <D:getetag/>"
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" <C:calendar-data/>"
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" </D:prop>"
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" <C:filter>"
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" <C:comp-filter name=\"VCALENDAR\">"
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" <C:comp-filter name=\"VTODO\">"
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" <C:prop-filter name=\"UID\">";
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/**
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* A static literal string containing the last part of the calendar query
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*/
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static char* search_tail =
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"</C:prop-filter>"
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" </C:comp-filter>"
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" </C:comp-filter>"
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" </C:filter>"
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"</C:calendar-query>";
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/**
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* Function for modifying an event.
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* @param settings A pointer to caldav_settings. @see caldav_settings
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* @param error A pointer to caldav_error. @see caldav_error
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* @return TRUE in case of error, FALSE otherwise.
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*/
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gboolean caldav_modify(caldav_settings* settings, caldav_error* error) {
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CURL* curl;
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CURLcode res = 0;
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char error_buf[CURL_ERROR_SIZE];
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struct config_data data;
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struct MemoryStruct chunk;
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struct MemoryStruct headers;
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struct curl_slist *http_header = NULL;
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gchar* search;
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gchar* uid;
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gboolean result = FALSE;
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gboolean LOCKSUPPORT = FALSE;
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gchar* lock_token = NULL;
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chunk.memory = NULL; /* we expect realloc(NULL, size) to work */
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chunk.size = 0; /* no data at this point */
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headers.memory = NULL;
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headers.size = 0;
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curl = get_curl(settings);
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if (!curl) {
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error->code = -1;
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error->str = g_strdup("Could not initialize libcurl");
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g_free(settings->file);
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settings->file = NULL;
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return TRUE;
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}
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http_header = curl_slist_append(http_header,
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"Content-Type: application/xml; charset=\"utf-8\"");
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http_header = curl_slist_append(http_header, "Depth: 1");
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http_header = curl_slist_append(http_header, "Expect:");
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http_header = curl_slist_append(http_header, "Transfer-Encoding:");
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http_header = curl_slist_append(http_header, "Connection: close");
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data.trace_ascii = settings->trace_ascii;
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curl_easy_setopt(curl, CURLOPT_HTTPHEADER, http_header);
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/* send all data to this function */
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curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, WriteMemoryCallback);
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/* we pass our 'chunk' struct to the callback function */
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curl_easy_setopt(curl, CURLOPT_WRITEDATA, (void *)&chunk);
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/* send all data to this function */
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curl_easy_setopt(curl, CURLOPT_HEADERFUNCTION, WriteHeaderCallback);
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/* we pass our 'headers' struct to the callback function */
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curl_easy_setopt(curl, CURLOPT_WRITEHEADER, (void *)&headers);
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curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, (char *) &error_buf);
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if (settings->debug) {
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curl_easy_setopt(curl, CURLOPT_DEBUGFUNCTION, my_trace);
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curl_easy_setopt(curl, CURLOPT_DEBUGDATA, &data);
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curl_easy_setopt(curl, CURLOPT_VERBOSE, 1);
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}
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gchar* file = g_strdup(settings->file);
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if ((uid = get_response_header("uid", file, FALSE)) == NULL) {
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g_free(file);
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error->code = 1;
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error->str = g_strdup("Error: Missing required UID for object");
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return TRUE;
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}
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g_free(file);
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/*
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* collation is not supported by ICalendar.
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* <C:text-match collation=\"i;ascii-casemap\">%s</C:text-match>
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*/
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search = g_strdup_printf(
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"%s\r\n<C:text-match>%s</C:text-match>\r\n%s",
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search_head, uid, search_tail);
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g_free(uid);
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/* enable uploading */
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curl_easy_setopt(curl, CURLOPT_POSTFIELDS, search);
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curl_easy_setopt (curl, CURLOPT_POSTFIELDSIZE, strlen(search));
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curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, "REPORT");
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curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1);
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curl_easy_setopt(curl, CURLOPT_UNRESTRICTED_AUTH, 1);
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curl_easy_setopt(curl, CURLOPT_POSTREDIR, CURL_REDIR_POST_ALL);
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res = curl_easy_perform(curl);
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curl_slist_free_all(http_header);
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http_header = NULL;
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g_free(search);
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if (res != 0) {
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error->code = -1;
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error->str = g_strdup_printf("%s", error_buf);
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g_free(settings->file);
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settings->file = NULL;
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result = TRUE;
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}
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else {
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long code;
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res = curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &code);
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if (code != 207) {
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error->code = code;
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error->str = g_strdup(chunk.memory);
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result = TRUE;
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}
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else {
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/* enable uploading */
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gchar* url = NULL;
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gchar* etag = NULL;
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url = get_url(chunk.memory);
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if (url) {
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etag = get_etag(chunk.memory);
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if (etag) {
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gchar* host = get_host(settings->url);
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if (host) {
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file = g_strdup(url);
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g_free(url);
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url = g_strdup_printf("%s%s", host, file);
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g_free(file);
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g_free(host);
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}
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else {
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g_free(etag);
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g_free(url);
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url = NULL;
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}
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}
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else {
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g_free(url);
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url = NULL;
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}
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if (url) {
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int lock = 0;
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caldav_error lock_error;
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lock_error.code = 0;
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lock_error.str = NULL;
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file = g_strdup(etag);
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g_free(etag);
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etag = g_strdup_printf("If-Match: %s", file);
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g_free(file);
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http_header = curl_slist_append(http_header, etag);
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g_free(etag);
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http_header = curl_slist_append(http_header,
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"Content-Type: text/calendar; charset=\"utf-8\"");
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http_header = curl_slist_append(http_header, "Expect:");
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http_header = curl_slist_append(
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http_header, "Transfer-Encoding:");
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http_header = curl_slist_append(http_header, "Connection: close");
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if (settings->use_locking)
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LOCKSUPPORT = caldav_lock_support(settings, &lock_error);
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else
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LOCKSUPPORT = FALSE;
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if (LOCKSUPPORT) {
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lock_token = caldav_lock_object(url, settings, &lock_error);
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if (lock_token) {
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http_header = curl_slist_append(
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http_header, g_strdup_printf(
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"If: (%s)", lock_token));
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}
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/*
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* If error code is 423 (Resource is LOCKED) bail out
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*/
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else if (lock_error.code == 423) {
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lock = -1;
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}
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/*
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* If error code is 501 (Not implemented) we continue
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* hoping for the best.
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*/
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else if (lock_error.code == 501) {
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lock_error.code = 0;
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g_free(lock_error.str);
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lock_error.str = NULL;
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LOCKSUPPORT = FALSE;
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}
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else {
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lock = -1;
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}
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}
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if (lock == 0) {
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curl_easy_setopt(curl, CURLOPT_HTTPHEADER, http_header);
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curl_easy_setopt(curl, CURLOPT_URL, rebuild_url(settings, url));
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curl_easy_setopt(curl, CURLOPT_POSTFIELDS, settings->file);
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curl_easy_setopt (curl, CURLOPT_POSTFIELDSIZE,
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strlen(settings->file));
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curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1);
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curl_easy_setopt(curl, CURLOPT_UNRESTRICTED_AUTH, 1);
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curl_easy_setopt(curl, CURLOPT_POSTREDIR, CURL_REDIR_POST_ALL);
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curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, "PUT");
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res = curl_easy_perform(curl);
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if (res != 0) {
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error->code = -1;
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error->str = g_strdup_printf("%s", error_buf);
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result = TRUE;
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}
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else {
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long code;
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res = curl_easy_getinfo(
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curl, CURLINFO_RESPONSE_CODE, &code);
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if (code != 204) {
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error->code = code;
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error->str = g_strdup(chunk.memory);
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result = TRUE;
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}
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}
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if (LOCKSUPPORT) {
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caldav_unlock_object(
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lock_token, url, settings, &lock_error);
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}
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}
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else {
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error->code = lock_error.code;
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error->str = g_strdup(lock_error.str);
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result = TRUE;
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}
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g_free(url);
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g_free(lock_token);
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g_free(lock_error.str);
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if (result) {
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g_free(settings->file);
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settings->file = NULL;
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}
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curl_slist_free_all(http_header);
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}
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else {
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error->code = code;
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if (chunk.memory)
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error->str = g_strdup(chunk.memory);
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else
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error->str = g_strdup("No object found");
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result = TRUE;
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}
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}
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else {
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/*
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* No object found on server. Posible synchronization
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* problem or a server side race condition
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*/
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error->code = 409;
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error->str = g_strdup("No object found");
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result = TRUE;
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}
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}
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}
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if (chunk.memory)
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free(chunk.memory);
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if (headers.memory)
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free(headers.memory);
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curl_easy_cleanup(curl);
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return result;
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}
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/**
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* Function for modifying a task.
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* @param settings A pointer to caldav_settings. @see caldav_settings
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* @param error A pointer to caldav_error. @see caldav_error
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* @return TRUE in case of error, FALSE otherwise.
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*/
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gboolean caldav_tasks_modify(caldav_settings* settings, caldav_error* error) {
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CURL* curl;
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CURLcode res = 0;
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char error_buf[CURL_ERROR_SIZE];
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struct config_data data;
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struct MemoryStruct chunk;
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struct MemoryStruct headers;
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struct curl_slist *http_header = NULL;
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gchar* search;
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gchar* uid;
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gboolean result = FALSE;
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gboolean LOCKSUPPORT = FALSE;
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gchar* lock_token = NULL;
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chunk.memory = NULL; /* we expect realloc(NULL, size) to work */
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chunk.size = 0; /* no data at this point */
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headers.memory = NULL;
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headers.size = 0;
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curl = get_curl(settings);
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if (!curl) {
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error->code = -1;
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error->str = g_strdup("Could not initialize libcurl");
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g_free(settings->file);
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settings->file = NULL;
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return TRUE;
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}
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http_header = curl_slist_append(http_header,
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"Content-Type: application/xml; charset=\"utf-8\"");
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http_header = curl_slist_append(http_header, "Depth: 1");
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http_header = curl_slist_append(http_header, "Expect:");
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http_header = curl_slist_append(http_header, "Transfer-Encoding:");
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http_header = curl_slist_append(http_header, "Connection: close");
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data.trace_ascii = settings->trace_ascii;
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curl_easy_setopt(curl, CURLOPT_HTTPHEADER, http_header);
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/* send all data to this function */
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curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, WriteMemoryCallback);
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/* we pass our 'chunk' struct to the callback function */
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curl_easy_setopt(curl, CURLOPT_WRITEDATA, (void *)&chunk);
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/* send all data to this function */
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curl_easy_setopt(curl, CURLOPT_HEADERFUNCTION, WriteHeaderCallback);
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/* we pass our 'headers' struct to the callback function */
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curl_easy_setopt(curl, CURLOPT_WRITEHEADER, (void *)&headers);
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curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, (char *) &error_buf);
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if (settings->debug) {
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curl_easy_setopt(curl, CURLOPT_DEBUGFUNCTION, my_trace);
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curl_easy_setopt(curl, CURLOPT_DEBUGDATA, &data);
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curl_easy_setopt(curl, CURLOPT_VERBOSE, 1);
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}
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gchar* file = g_strdup(settings->file);
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if ((uid = get_response_header("uid", file, FALSE)) == NULL) {
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g_free(file);
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error->code = 1;
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error->str = g_strdup("Error: Missing required UID for object");
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return TRUE;
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}
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g_free(file);
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/*
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* collation is not supported by ICalendar.
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* <C:text-match collation=\"i;ascii-casemap\">%s</C:text-match>
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*/
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search = g_strdup_printf(
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"%s\r\n<C:text-match>%s</C:text-match>\r\n%s",
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search_tasks_head, uid, search_tail);
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g_free(uid);
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/* enable uploading */
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curl_easy_setopt(curl, CURLOPT_POSTFIELDS, search);
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curl_easy_setopt (curl, CURLOPT_POSTFIELDSIZE, strlen(search));
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curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, "REPORT");
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curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1);
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curl_easy_setopt(curl, CURLOPT_UNRESTRICTED_AUTH, 1);
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curl_easy_setopt(curl, CURLOPT_POSTREDIR, CURL_REDIR_POST_ALL);
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res = curl_easy_perform(curl);
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curl_slist_free_all(http_header);
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http_header = NULL;
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g_free(search);
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if (res != 0) {
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error->code = -1;
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error->str = g_strdup_printf("%s", error_buf);
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g_free(settings->file);
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settings->file = NULL;
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result = TRUE;
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}
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else {
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long code;
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res = curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &code);
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if (code != 207) {
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error->code = code;
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error->str = g_strdup(chunk.memory);
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result = TRUE;
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}
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else {
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/* enable uploading */
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gchar* url = NULL;
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gchar* etag = NULL;
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url = get_url(chunk.memory);
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if (url) {
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etag = get_etag(chunk.memory);
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if (etag) {
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gchar* host = get_host(settings->url);
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if (host) {
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file = g_strdup(url);
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g_free(url);
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url = g_strdup_printf("%s%s", host, file);
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g_free(file);
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g_free(host);
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}
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else {
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g_free(etag);
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g_free(url);
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url = NULL;
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}
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}
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else {
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g_free(url);
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url = NULL;
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}
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if (url) {
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int lock = 0;
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caldav_error lock_error;
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lock_error.code = 0;
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lock_error.str = NULL;
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file = g_strdup(etag);
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g_free(etag);
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etag = g_strdup_printf("If-Match: %s", file);
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g_free(file);
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http_header = curl_slist_append(http_header, etag);
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g_free(etag);
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http_header = curl_slist_append(http_header,
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"Content-Type: text/calendar; charset=\"utf-8\"");
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http_header = curl_slist_append(http_header, "Expect:");
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http_header = curl_slist_append(
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http_header, "Transfer-Encoding:");
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http_header = curl_slist_append(http_header, "Connection: close");
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if (settings->use_locking)
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LOCKSUPPORT = caldav_lock_support(settings, &lock_error);
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else
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LOCKSUPPORT = FALSE;
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if (LOCKSUPPORT) {
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lock_token = caldav_lock_object(url, settings, &lock_error);
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if (lock_token) {
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http_header = curl_slist_append(
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http_header, g_strdup_printf(
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"If: (%s)", lock_token));
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}
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/*
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* If error code is 423 (Resource is LOCKED) bail out
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*/
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else if (lock_error.code == 423) {
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lock = -1;
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}
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/*
|
|
* If error code is 501 (Not implemented) we continue
|
|
* hoping for the best.
|
|
*/
|
|
else if (lock_error.code == 501) {
|
|
LOCKSUPPORT = FALSE;
|
|
}
|
|
else {
|
|
lock = -1;
|
|
}
|
|
}
|
|
if (lock == 0) {
|
|
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 (res != 0) {
|
|
error->code = -1;
|
|
error->str = g_strdup_printf("%s", error_buf);
|
|
result = TRUE;
|
|
}
|
|
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;
|
|
}
|
|
}
|
|
if (LOCKSUPPORT) {
|
|
caldav_unlock_object(
|
|
lock_token, url, settings, &lock_error);
|
|
}
|
|
}
|
|
g_free(url);
|
|
g_free(lock_token);
|
|
g_free(lock_error.str);
|
|
if (result) {
|
|
g_free(settings->file);
|
|
settings->file = NULL;
|
|
}
|
|
curl_slist_free_all(http_header);
|
|
}
|
|
else {
|
|
error->code = -1;
|
|
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;
|
|
}
|
|
|