-// This file contains functions which handle all of the CalDAV "REPORT" queries
-// specified in RFC4791 section 7.
-//
+// This file contains functions which handle all of the CalDAV "REPORT" queries specified in RFC4791 section 7.
// Copyright (c) 2023-2024 by the citadel.org team
-//
-// This program is open source software. Use, duplication, or
-// disclosure is subject to the GNU General Public License v3.
+// This program is open source software. Use, duplication, or disclosure is subject to the GNU General Public License v3.
#include "webcit.h"
+// Shorthand for the XML namespace of CalDAV
+#define CAL "urn:ietf:params:xml:ns:caldav:"
+#define CALLEN sizeof(CAL)-1
// A CalDAV REPORT can only be one type. This is stored in the report_type member.
enum cr_type {
// Data type for CalDAV Report Parameters.
// As we slog our way through the XML we learn what the client is asking for
// and build up the contents of this data type.
-struct cr_parms {
+struct cr_params {
int tag_nesting_level; // not needed, just kept for pretty-printing
enum cr_type report_type; // which RFC4791 section 7 REPORT are we generating
StrBuf *Chardata; // XML chardata in between tags is built up here
StrBuf *Hrefs; // list of items requested by a `calendar-multiget` REPORT
+ Array *filters; // If the query contains a FILTER stanza, the filter criteria are populated here
};
// XML parser callback
void caldav_xml_start(void *data, const char *el, const char **attr) {
- struct cr_parms *crp = (struct cr_parms *) data;
- int i;
-
- // syslog(LOG_DEBUG, "CALDAV ELEMENT START: <%s> %d", el, crp->tag_nesting_level);
+ struct cr_params *crp = (struct cr_params *) data;
+#ifdef DEBUG_XML_PARSE
+ // logging
+ int i;
+ char indent[256];
+ indent[0] = 0;
+ lor (i=0; i<crp->tag_nesting_level; ++i) {
+ strcat(indent, " ");
+ }
+ syslog(LOG_DEBUG, "%s<%s>", indent, el);
+ ++crp->tag_nesting_level;
+ indent[0] = 0;
+ for (i=0; i<crp->tag_nesting_level; ++i) {
+ strcat(indent, " ");
+ }
for (i = 0; attr[i] != NULL; i += 2) {
- syslog(LOG_DEBUG, " Attribute '%s' = '%s'", attr[i], attr[i + 1]);
+ syslog(LOG_DEBUG, "%sAttribute '%s' = '%s'", indent, attr[i], attr[i + 1]);
}
+ // end logging
+#endif
// RFC4791 7.8 "calendar-query" REPORT - Client will send a lot of search criteria.
- if (!strcasecmp(el, "urn:ietf:params:xml:ns:caldav:calendar-query")) {
+ if (!strcasecmp(el, CAL"calendar-query")) {
crp->report_type = cr_calendar_query;
}
// RFC4791 7.9 "calendar-multiget" REPORT - Client will supply a list of specific hrefs.
- else if (!strcasecmp(el, "urn:ietf:params:xml:ns:caldav:calendar-multiget")) {
+ else if (!strcasecmp(el, CAL"calendar-multiget")) {
crp->report_type = cr_calendar_multiget;
}
// RFC4791 7.10 "free-busy-query" REPORT
- else if (!strcasecmp(el, "urn:ietf:params:xml:ns:caldav:free-busy-query")) {
+ else if (!strcasecmp(el, CAL"free-busy-query")) {
crp->report_type = cr_freebusy_query;
}
- ++crp->tag_nesting_level;
+ // RFC4791 9.7 create a filter array if this query contains a "filter" stanza
+ else if (!strcasecmp(el, CAL"filter")) {
+ crp->filters = array_new(SIZ);
+ }
+
+ // Handle the filters defined in RFC4791 9.7.1 through 9.7.5
+ else if ( ( (!strcasecmp(el, CAL"comp-filter"))
+ || (!strcasecmp(el, CAL"prop-filter"))
+ || (!strcasecmp(el, CAL"param-filter"))
+ || (!strcasecmp(el, CAL"is-not-defined"))
+ || (!strcasecmp(el, CAL"text-match"))
+ )
+ && (crp->filters) // Make sure we actually allocated an array
+ ) {
+ char newfilter[SIZ];
+ int a = 0;
+ int len = snprintf(newfilter, SIZ, &el[CALLEN]); // strip off the namespace for our purposes
+ while (attr[a]) {
+ len += snprintf(&newfilter[len], SIZ-len, "|%s", attr[a++]); // now save the attributes
+ }
+ array_append(crp->filters, newfilter);
+ }
+
}
// XML parser callback
void caldav_xml_end(void *data, const char *el) {
- struct cr_parms *crp = (struct cr_parms *) data;
+ struct cr_params *crp = (struct cr_params *) data;
+
--crp->tag_nesting_level;
- if (crp->Chardata != NULL) {
- // syslog(LOG_DEBUG, "CALDAV CHARDATA : %s", ChrPtr(crp->Chardata));
+#ifdef DEBUG_XML_PARSE
+ // logging
+ int i;
+ char indent[256];
+ indent[0] = 0;
+ for (i=0; i<crp->tag_nesting_level; ++i) {
+ strcat(indent, " ");
}
- // syslog(LOG_DEBUG, "CALDAV ELEMENT END : <%s> %d", el, crp->tag_nesting_level);
+ syslog(LOG_DEBUG, "%s</%s>", indent, el);
+ // end logging
+#endif
if ((!strcasecmp(el, "DAV::href")) || (!strcasecmp(el, "DAV:href"))) {
if (crp->Hrefs == NULL) { // append crp->Chardata to crp->Hrefs
// XML parser callback
-void caldav_xml_chardata(void *data, const XML_Char * s, int len) {
- struct cr_parms *crp = (struct cr_parms *) data;
+void caldav_xml_chardata(void *data, const XML_Char *s, int len) {
+ struct cr_params *crp = (struct cr_params *) data;
+
+ char *app = malloc(len+1);
+ if (!app) {
+ return;
+ }
+ memcpy(app, s, len);
+ app[len] = 0;
if (crp->Chardata == NULL) {
crp->Chardata = NewStrBuf();
}
- StrBufAppendBufPlain(crp->Chardata, s, len, 0);
+ StrBufAppendBufPlain(crp->Chardata, app, len, 0);
+
+#ifdef DEBUG_XML_PARSE
+ // logging
+ string_trim(app); // remove leading/trailing whitespace. ok to mangle it because we've already appended.
+ if (!IsEmptyStr(app)) {
+ int i;
+ char indent[256];
+ indent[0] = 0;
+ for (i=0; i<crp->tag_nesting_level; ++i) {
+ strcat(indent, " ");
+ }
+ syslog(LOG_DEBUG, "%s%s", indent, app, len);
+ }
+ // end logging
+#endif
+ free(app);
return;
}
}
+// Called by caldav_apply_filters() to apply ONE filter.
+// Returns 0 if the calendar item does not match the filter.
+// Returns 1 if the calendar item DOES match the filter.
+int caldav_apply_one_filter(void *cal, char *filter) {
+ syslog(LOG_DEBUG, "applying filter: %s", filter);
+
+ char this_filter[SIZ]; // we have to copy the filter string because we will destructively tokenize it
+ safestrncpy(this_filter, filter, sizeof(this_filter));
+
+ char *t[10] = { NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL } ;
+ char *f = this_filter;
+ int num_tokens = 0;
+ while ( (t[num_tokens]=strtok_r(f, "|", &f)) && (num_tokens<10) ) {
+ ++num_tokens;
+ }
+
+ // BEGIN experimental block -- see what happens when we cast to the wrong type
+
+ //icalcomponent *foo_comp = (icalcomponent *) cal;
+ //icalproperty *foo_prop = (icalproperty *) cal;
+ //icalparameter *foo_param = (icalparameter *) cal;
+
+ // END experimental block
+
+ // Handle the individual filters defined in RFC4791 9.7.1 through 9.7.5
+
+ if (!strcasecmp(t[0], "comp-filter")) { // RFC4791 9.7.1 - filter by component
+ syslog(LOG_DEBUG, "component filter FIXME not implemented yet");
+ if (icalcomponent_isa_component(cal)) {
+ syslog(LOG_DEBUG, "\033[32m yes this is a component \033[0m");
+ }
+ else {
+ syslog(LOG_DEBUG, "\033[31m no this is not a component \033[0m");
+ }
+ }
+
+ else if (!strcasecmp(t[0], "prop-filter")) { // RFC4791 9.7.2 - filter by property
+ syslog(LOG_DEBUG, "property filter FIXME not implemented yet");
+ }
+
+ else if (!strcasecmp(t[0], "param-filter")) { // RFC4791 9.7.3 - filter by parameter
+ syslog(LOG_DEBUG, "parameter filter FIXME not implemented yet");
+ }
+
+ else if (!strcasecmp(t[0], "is-not-defined")) { // RFC4791 9.7.4
+ syslog(LOG_DEBUG, "is-not-defined filter FIXME not implemented yet");
+ }
+
+ else if (!strcasecmp(t[0], "text-match")) { // RFC4791 9.7.5
+ syslog(LOG_DEBUG, "text match filter FIXME not implemented yet");
+ }
+
+ return(1);
+}
+
+
+// Recursive function to apply CalDAV FILTERS to a calendar item.
+// Returns zero if the calendar item was disqualified by a filter, nonzero if the calendar item still qualifies.
+int caldav_apply_filters(void *cal, Array *filters, int index) {
+
+ // Apply *this* filter.
+ if (caldav_apply_one_filter(cal, array_get_element_at(filters, index)) == 0) {
+ return(0);
+ }
+
+ // If we get to this point, the current filter has passed, and we move on to the next one.
+ if (index < array_len(filters)-1) {
+ return(caldav_apply_filters(cal, filters, index+1));
+ }
+
+ // If we got this far, every filter passed, and the calendar item qualifies for output.
+ return(1);
+}
+
+
// Called by report_the_room_itself() in room_functions.c when a CalDAV REPORT method
// is requested on a calendar room. We fire up an XML Parser to decode the request and
// hopefully produce the correct output.
void caldav_report(struct http_transaction *h, struct ctdlsession *c) {
- struct cr_parms crp;
+ struct cr_params crp;
char buf[1024];
- memset(&crp, 0, sizeof(struct cr_parms));
+ memset(&crp, 0, sizeof(struct cr_params));
XML_Parser xp = XML_ParserCreateNS("UTF-8", ':');
if (xp == NULL) {
XML_Parse(xp, h->request_body, h->request_body_length, 1);
XML_ParserFree(xp);
- if (crp.Chardata != NULL) { // Discard any trailing chardata ... normally nothing here
+ if (crp.Chardata != NULL) { // Discard any trailing chardata ... normally nothing here
FreeStrBuf(&crp.Chardata);
crp.Chardata = NULL;
}
StrBuf *one_item = fetch_ical(c, m);
icalcomponent *cal = icalcomponent_new_from_string(ChrPtr(one_item));
- // this is a horrible temporary hack to output every item
+ // Does this calendar item qualify for output?
int qualify = 1;
+ // If there was a filter stanza, run this calendar item through the filters.
+ qualify = caldav_apply_filters(cal, crp.filters, 0);
+ syslog(LOG_DEBUG, "Message %ld does%s qualify", m, (qualify ? "" : " NOT"));
+
+ // Did this calendar item match the query? If so, output it.
if (qualify) {
+ // FIXME need to populate the Href instead of NULL
cal_multiget_out(m, NULL, one_item, ReportOut);
}
FreeStrBuf(&crp.Hrefs);
crp.Hrefs = NULL;
}
+ if (crp.filters) {
+ array_free(crp.filters);
+ crp.filters = NULL;
+ }
StrBufAppendPrintf(ReportOut, "</D:multistatus>\n"); // End the REPORT.
projects / citadel.git / blobdiff