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292 lines
9.1 KiB
292 lines
9.1 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 "lock-caldav-object.h"
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#include "options-caldav-server.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 lock query.
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*/
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static char* lock_query =
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"<?xml version=\"1.0\" encoding=\"utf-8\" ?>"
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"<D:lockinfo xmlns:D=\"DAV:\">"
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" <D:lockscope><D:exclusive/></D:lockscope>"
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" <D:locktype><D:write/></D:locktype>"
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"</D:lockinfo>";
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/**
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* Function which requests a lock on a calendar resource
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* @param URI The resource to request lock on.
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* @param settings @see caldav_settings
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* @param error A pointer to caldav_error. @see caldav_error
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* @return The Lock-Token or NULL in case of error
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*/
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gchar* caldav_lock_object(
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gchar* URI, 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* lock_token = NULL;
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gchar* url;
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if (! caldav_lock_support(settings, error))
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return lock_token;
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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 lock_token;
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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, "Timeout: Second-300");
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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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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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if (settings->usehttps) {
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url = g_strdup_printf("https://%s", URI);
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} else {
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url = g_strdup_printf("http://%s", URI);
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}
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curl_easy_setopt(curl, CURLOPT_URL, url);
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g_free(url);
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/* enable uploading */
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curl_easy_setopt(curl, CURLOPT_POSTFIELDS, lock_query);
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curl_easy_setopt (curl, CURLOPT_POSTFIELDSIZE, strlen(lock_query));
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curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, "LOCK");
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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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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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}
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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 != 200) {
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gchar* status = get_tag("status", chunk.memory);
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if (status && strstr(status, "423") != NULL) {
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error->code = 423;
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error->str = g_strdup(status);
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}
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else {
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error->code = code;
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error->str = g_strdup(chunk.memory);
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}
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g_free(status);
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}
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else {
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lock_token = get_response_header(
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"Lock-Token", headers.memory, FALSE);
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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 lock_token;
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}
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/**
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* Function which requests to have a lock removed from a calendar resource
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* @param lock_token A previous acquired Lock-Token
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* @param URI The resource to request unlock on.
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* @param settings @see caldav_settings
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* @param error A pointer to caldav_error. @see caldav_error
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* @return False in case the lock could not be removed. True otherwise.
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*/
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gboolean caldav_unlock_object(gchar* lock_token, gchar* URI,
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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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gboolean result = FALSE;
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gchar* url;
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if (! caldav_lock_support(settings, error))
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return result;
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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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g_strdup_printf("Lock-Token: %s", lock_token));
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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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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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if (settings->usehttps) {
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url = g_strdup_printf("https://%s", URI);
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} else {
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url = g_strdup_printf("http://%s", URI);
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}
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curl_easy_setopt(curl, CURLOPT_URL, url);
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g_free(url);
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/* enable uploading */
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curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, "UNLOCK");
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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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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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}
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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 != 204) {
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error->code = code;
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error->str = g_strdup(chunk.memory);
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}
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else {
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result = TRUE;
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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 to test whether the server supports locking or not. Searching
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* for PROP LOCK. If LOCK is present then according to RFC4791 PROP UNLOCK
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* must also be present.
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* @param settings @see caldav_settings
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* @param error A pointer to caldav_error. @see caldav_error
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* @return True if locking is supported by the server. False otherwise
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*/
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gboolean caldav_lock_support(caldav_settings* settings, caldav_error* error) {
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gboolean found = FALSE;
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gchar* url = NULL;
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gchar* mystr = NULL;
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runtime_info* info;
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info = caldav_get_runtime_info();
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info->options->verify_ssl_certificate = settings->verify_ssl_certificate;
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info->options->custom_cacert = g_strdup(settings->custom_cacert);
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if (settings->usehttps) {
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mystr = g_strdup("https://");
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} else {
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mystr = g_strdup("http://");
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}
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if (settings->username && settings->password) {
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url = g_strdup_printf("%s%s:%s@%s",
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mystr, settings->username, settings->password, settings->url);
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}
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else if (settings->username) {
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url = g_strdup_printf("%s%s@%s",
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mystr, settings->username, settings->url);
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}
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else {
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url = g_strdup_printf("%s%s", mystr, settings->url);
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}
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gchar** options = caldav_get_server_options(url, info);
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g_free(url);
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gchar** tmp = options;
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caldav_free_runtime_info(&info);
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while (*options) {
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if (strcmp(*options++, "LOCK") == 0) {
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found = TRUE;
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break;
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}
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}
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g_strfreev(tmp);
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g_free(mystr);
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return found;
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}
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