/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright 2022 Olaf Wintermann. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include "service.h"
#include <stdio.h>
#include <string.h>
#include "resource.h"
int pg_query(pblock *pb, Session *sn, Request *rq) {
char *respool = pblock_findval("resource", pb);
char *query = pblock_findval("query", pb);
if(!respool) {
log_ereport(LOG_MISCONFIG, "pg-query: missing resource parameter");
return REQ_ABORTED;
}
if(!query) {
log_ereport(LOG_MISCONFIG, "pg-query: missing query parameter");
return REQ_ABORTED;
}
// Get the named resource and check if the PG connection works
ResourceData *res = resourcepool_lookup(sn, rq, respool, 0);
if(!res) {
log_ereport(LOG_FAILURE, "pg-query: cannot get resource ''%s''", respool);
return REQ_ABORTED;
}
PGconn *connection = res->data;
if(pg_check_connection(LOG_FAILURE, respool, connection)) {
return REQ_ABORTED;
}
// execute query
PGresult *result = PQexec(connection, query);
if(!result) return REQ_ABORTED;
// start response
pblock_remove("content-type", rq->srvhdrs);
pblock_nvinsert("content-type", "text/html", rq->srvhdrs);
protocol_status(sn, rq, 200, NULL);
http_start_response(sn, rq);
// (html) header
net_printf(sn->csd, "%s", "<!DOCTYPE html>\n<html><head></head><body>\n");
int nfields = PQnfields(result);
if(nfields > 0) {
net_printf(sn->csd, "<table>\n<tr>\n");
for(int i=0;i<nfields;i++) {
char *fieldName = PQfname(result, i);
char *fieldNameEscaped = util_html_escape(fieldName);
if(fieldNameEscaped) {
net_printf(sn->csd, "<th>%s</th>\n", fieldNameEscaped);
FREE(fieldNameEscaped);
}
}
net_printf(sn->csd, "</tr>\n");
int nrows = PQntuples(result);
for(int r=0;r<nrows;r++) {
net_printf(sn->csd, "<tr>\n");
for(int c=0;c<nfields;c++) {
char *fieldValue = PQgetvalue(result, r, c);
char *fieldValueEscaped = util_html_escape(fieldValue);
if(fieldValueEscaped) {
net_printf(sn->csd, "<td>%s</td>\n", fieldValueEscaped);
FREE(fieldValueEscaped);
}
}
net_printf(sn->csd, "</tr>\n");
}
net_printf(sn->csd, "</table>\n");
} else {
net_printf(sn->csd, "<p>%s</p>\n", PQresStatus(PQresultStatus(result)));
}
net_printf(sn->csd, "%s", "</body></html>\n");
PQclear(result);
return REQ_PROCEED;
}