3
Hello,
I wrote C program for connecting to postgresSQL server to retrieve data from the postgres database. The program is:
#include <stdio.h>
#include <stdlib.h>
#include "libpq-fe.h"
int
Search(inStruct Sentries)
{
char state_code[3];
char query_string[256];
PGconn *conn;
PGresult *res;
int i;
conn = PQconnectdb("host=127.0.0.1 dbname=ontology user=postgres password=postgres port=5432");
if (PQstatus(conn) == CONNECTION_BAD)
{
printf("Content-type: text/html%c%c",10,10);fflush(stdout);
printf("<html>");
printf("<body background=\"%s/background.gif\">", webPath);
fprintf(stderr, "Connection to database failed.\n");
fprintf(stderr, "%s", PQerrorMessage(conn));
exit(1);
printf("</body></html>");
}
sprintf(query_string,
"SELECT term_name \
FROM term \
WHERE term_id = '%s'", Sentries->entries[1].val);
res = PQexec(conn, query_string);
if (PQresultStatus(res) != PGRES_TUPLES_OK)
{
printf("Content-type: text/html%c%c",10,10);fflush(stdout);
printf("<html>");
printf("<body background=\"%s/background.gif\">", webPath);
fprintf(stderr, "SELECT query failed.\n");
PQclear(res);
PQfinish(conn);
exit(1);
printf("</body></html>");
}
for (i = 0; i < PQntuples(res); i++)
printf("%s\n", PQgetvalue(res, i, 0));
printf("Content-type: text/html%c%c",10,10);fflush(stdout);
printf("<html>");
printf("<body background=\"%s/background.gif\">", webPath);
printf("<br><br><font>Term Name: </font><font color=#FF0000>%s</font>",res);
printf("</body></html>");
PQclear(res);
PQfinish(conn);
return 0;
}
When I run this program, I got the Internal Server Error. What could be the problem here? Can anyone help me to solve this problem.
Really appreciate for the helping hands.
With Regards,
SYT
