diff options
Diffstat (limited to 'src/lock-caldav-object.c')
| -rw-r--r-- | src/lock-caldav-object.c | 292 |
1 files changed, 292 insertions, 0 deletions
diff --git a/src/lock-caldav-object.c b/src/lock-caldav-object.c new file mode 100644 index 0000000..1ddf926 --- /dev/null +++ b/src/lock-caldav-object.c @@ -0,0 +1,292 @@ +/* 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 "lock-caldav-object.h" +#include "options-caldav-server.h" +#include <glib.h> +#include <curl/curl.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +/** + * A static literal string containing the lock query. + */ +static char* lock_query = +"<?xml version=\"1.0\" encoding=\"utf-8\" ?>" +"<D:lockinfo xmlns:D=\"DAV:\">" +" <D:lockscope><D:exclusive/></D:lockscope>" +" <D:locktype><D:write/></D:locktype>" +"</D:lockinfo>"; + +/** + * Function which requests a lock on a calendar resource + * @param URI The resource to request lock on. + * @param settings @see caldav_settings + * @param error A pointer to caldav_error. @see caldav_error + * @return The Lock-Token or NULL in case of error + */ +gchar* caldav_lock_object( + gchar* URI, 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* lock_token = NULL; + gchar* url; + + if (! caldav_lock_support(settings, error)) + return lock_token; + 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 lock_token; + } + + http_header = curl_slist_append(http_header, + "Content-Type: application/xml; charset=\"utf-8\""); + http_header = curl_slist_append(http_header, "Timeout: Second-300"); + 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); + } + if (settings->usehttps) { + url = g_strdup_printf("https://%s", URI); + } else { + url = g_strdup_printf("http://%s", URI); + } + curl_easy_setopt(curl, CURLOPT_URL, url); + g_free(url); + /* enable uploading */ + curl_easy_setopt(curl, CURLOPT_POSTFIELDS, lock_query); + curl_easy_setopt (curl, CURLOPT_POSTFIELDSIZE, strlen(lock_query)); + curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, "LOCK"); + 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); + if (res != 0) { + error->code = -1; + error->str = g_strdup_printf("%s", error_buf); + g_free(settings->file); + settings->file = NULL; + } + else { + long code; + res = curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &code); + if (code != 200) { + gchar* status = get_tag("status", chunk.memory); + if (status && strstr(status, "423") != NULL) { + error->code = 423; + error->str = g_strdup(status); + } + else { + error->code = code; + error->str = g_strdup(chunk.memory); + } + g_free(status); + } + else { + lock_token = get_response_header( + "Lock-Token", headers.memory, FALSE); + } + } + if (chunk.memory) + free(chunk.memory); + if (headers.memory) + free(headers.memory); + curl_easy_cleanup(curl); + return lock_token; +} + +/** + * Function which requests to have a lock removed from a calendar resource + * @param lock_token A privious aquired Lock-Token + * @param URI The resource to request unlock on. + * @param settings @see caldav_settings + * @param error A pointer to caldav_error. @see caldav_error + * @return False in case the lock could not be removed. True otherwise. + */ +gboolean caldav_unlock_object(gchar* lock_token, gchar* URI, + 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; + gboolean result = FALSE; + gchar* url; + + if (! caldav_lock_support(settings, error)) + return result; + 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, + g_strdup_printf("Lock-Token: %s", lock_token)); + 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); + } + if (settings->usehttps) { + url = g_strdup_printf("https://%s", URI); + } else { + url = g_strdup_printf("http://%s", URI); + } + curl_easy_setopt(curl, CURLOPT_URL, url); + g_free(url); + /* enable uploading */ + curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, "UNLOCK"); + 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); + if (res != 0) { + error->code = -1; + error->str = g_strdup_printf("%s", error_buf); + 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); + } + else { + result = TRUE; + } + } + if (chunk.memory) + free(chunk.memory); + if (headers.memory) + free(headers.memory); + curl_easy_cleanup(curl); + return result; +} + +/** + * Function to test whether the server supports locking or not. Searching + * for PROP LOCK. If LOCK is present then according to RFC4791 PROP UNLOCK + * must also be present. + * @param settings @see caldav_settings + * @param error A pointer to caldav_error. @see caldav_error + * @return True if locking is supported by the server. False otherwise + */ +gboolean caldav_lock_support(caldav_settings* settings, caldav_error* error) { + gboolean found = FALSE; + gchar* url = NULL; + gchar* mystr = NULL; + runtime_info* info; + + info = caldav_get_runtime_info(); + info->options->verify_ssl_certificate = settings->verify_ssl_certificate; + info->options->custom_cacert = g_strdup(settings->custom_cacert); + if (settings->usehttps) { + mystr = g_strdup("https://"); + } else { + mystr = g_strdup("http://"); + } + + + if (settings->username && settings->password) { + url = g_strdup_printf("%s%s:%s@%s", + mystr, settings->username, settings->password, settings->url); + } + else if (settings->username) { + url = g_strdup_printf("%s%s@%s", + mystr, settings->username, settings->url); + } + else { + url = g_strdup_printf("%s%s", mystr, settings->url); + } + gchar** options = caldav_get_server_options(url, info); + g_free(url); + gchar** tmp = options; + caldav_free_runtime_info(&info); + while (*options) { + if (strcmp(*options++, "LOCK") == 0) { + found = TRUE; + break; + } + } + g_strfreev(tmp); + g_free(mystr); + return found; +} + + |