G-WAN - How to return Status Code: 200 OK if request URL = 541+ characters? - httprequest

Question

I'm using G-WAN Web App. Server v7.12.6.
How to return valid Status Code: 200 OK if request URL has a total of 541+ characters including the 25 parameters?
ajaxGet(URL, method) where method is GET or PUT (same result)
Request URL:
http://myWebsite.ca:xx/?createCompany.c&legalname=mycomp&dba=mycomp%20dba&www=www.myWebsite...
createCompany.c
#pragma link "pq"
#include <stdlib.h>
#include <string.h>
#include "/usr/include/postgresql/libpq-fe.h"
#include "gwan.h"
//----------------------------------------------------------------------------
int main(int argc, char *argv[]) {
u64 start = getus();
PGconn *conn;
PGresult *res;
char DBrequestString [1000] = "";
char *legal_name = 0, *dba = 0, *www = 0; //...+ 22 more
xbuf_t *reply = get_reply(argv);
get_arg("legalname=", &legal_name, argc, argv);
get_arg("dba=", &dba, argc, argv);
get_arg("www=", &www, argc, argv);
//...+ 22 more
char requestString[1000] = "SELECT create_company('%s','%s','%s', ... + 22 more);";
sprintf(DBrequestString, requestString,legal_name, dba, www, ... + 22 more);
conn = PQconnectdb("host=x port=x dbname=x user=x password=x");
if (PQstatus(conn) != CONNECTION_OK){
fprintf(stderr, "Connection to database failed: %s",PQerrorMessage(conn));
PQfinish(conn);
xbuf_cat(reply, "{\"message\":\"Connection to database failed !\"}");//message Json format
return 200;
}
res = PQexec(conn, DBrequestString);
printf(" --> %s\n",PQgetvalue(res, 0, 0));
xbuf_cat(reply, PQgetvalue(res, 0, 0));//return one line Json format
PQclear(res);
PQfinish(conn);
printf("TEMPS D'EXECUTION: %.2Fms\n\n",(getus() - start)/1000.0);
return 200; //return OK
}

Answer 1

Good question - I don't have access to the source code righ tnow but looking at the G-WAN API on the website made me think that either READ_XBUF or MAX_ENTITY_SIZE might help.
Typically, READ_XBUF would be used in a G-WAN HANDLER to augment (if needed) the connection buffer while MAX_ENTITY_SIZE is a one-time setting that can be changed at any time (and even before the server starts, thanks to the init.c script).
I think that just enlarging the MAX_ENTITY_SIZE value (which purpose is to prevent lage-entity DoS attacks) would do the job because it is most likely that G-WAN automatically enlarges the READ_XBUF on a per request basis when reading from the client.

Answer 2

Thank you for your quick response.
I updated the script createCompany.c to raise the limit (as per your example):
u32 *old_entity_size = (u32*)get_env(argv, MAX_ENTITY_SIZE);
u32 new_entity_size = 2 * 1024 * 1024; // 2 MiB
*old_entity_size = new_entity_size; // raise the limit to 2 MiB
It's that possible the MAX_ENTITY_SIZE it's exclusively for POST request?
Raising the MAX_ENTITY_SIZE limit will work for GET/PUT requests also?
Actualy, I would like the limit to remain as initialy setup by default by G-WAN, useful for the other .c scripts,
but to raise the limit for GET/PUT requests only for this particular script createCompany.c
Any script.c example how to raise the limit for READ_XBUF?