Have you seen this example?
https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x/modules/examples/mod_example_hooks.c
It will show you how to log at the very least.
-Topher
-----Original Message-----
From: Bill Moo <mookimo...@gmail.com>
Sent: Tuesday, July 30, 2019 11:06 AM
To: modules-dev@httpd.apache.org
Subject: [EXTERNAL] Re: No content returned from directive handler sample.
If it help anyone then here if the code I am using:
/* module mod_graphing.c: */
#include <stdio.h>
#include "apr_hash.h"
#include "ap_config.h"
#include "ap_provider.h"
#include "httpd.h"
#include "http_core.h"
#include "http_config.h"
#include "http_log.h"
#include "http_protocol.h"
#include "http_request.h"
extern module mod_graphing ;
/* Struct used to store template settings for a graph */ typedef struct {
const char * m_Name ;
const char * m_Template ;
unsigned int refresh ;
} PROCEDURE ;
/* Our configuration prototype and declaration: */ typedef struct {
const char * m_SQL ; /* SQL Connection String */
const char * m_Usr ; /* SQL User name */
const char * m_Pwd ; /* SQL Password */
unsigned long m_Port ; /* Port No */
PROCEDURE * m_Procs ;/* Array of Procedure Structures */ } CONFIG ;
static int configHandler(request_rec *) ; const char * configSetSQL(cmd_parms
*, void *, const char *) ; const char * configSetPort(cmd_parms *, void *,
const char *) ; //const char * configSetPort(cmd_parms *, void *, const
unsigned long *) ; const char * configSetSQLUser(cmd_parms *, void *, const
char *, const char *) ; static void register_hooks(apr_pool_t *) ;
static CONFIG Config;
/* Handler for the "examplePath" directive */ const char *
configSetSQL(cmd_parms * cmd, void * cfg, const char * arg) {
Config.m_SQL = arg ;
return NULL ;
}
const char * configSetPort(cmd_parms * cmd, void * cfg, const char * arg) {
Config.m_Port = atol(arg) ;
return NULL ;
}
const char * configSetSQLUser(cmd_parms * cmd, void * cfg, const char
* usr, const char * pwd) {
Config.m_Usr = usr ;
Config.m_Pwd = pwd ;
return NULL ;
}
/* The directive structure for our name tag: */ extern const command_rec
configDirectives[] = {
AP_INIT_TAKE1("sqlConnection", configSetSQL, NULL, ACCESS_CONF, "Set the
PostgreSQL Connection"),
AP_INIT_TAKE1("sqlPortNo”, configSetPort, NULL, ACCESS_CONF, "Set SQL Port
No”),
AP_INIT_TAKE2("sqlUserInfo", configSetSQLUser, NULL, ACCESS_CONF, "Set
PostgreSQL Username / Password"),
{ NULL }
};
/* Our module handler: */
static int configHandler(request_rec *r) {
if(!r->handler || strcmp(r->handler, "configHandler")) return(DECLINED);
ap_set_content_type(r, "text/plain");
ap_rprintf(r, "User IP : %s", r->useragent_ip) ;
ap_rprintf(r, "SQL Conn : %s", Config->m_SQL) ;
ap_rprintf(r, "SQL User : %s, %s", Config->m_Usr, Config->m_Pwd) ;
ap_rprintf(r, “Port No : %ul", Config->m_Port) ;
return OK;
};
/* The hook registration function (also initializes the default config
values): */
static void register_hooks(apr_pool_t *pool) {
Config.m_SQL = NULL ;
Config.m_Usr = NULL ;
Config.m_Pwd = NULL ;
Config.m_Port = 0 ;
Config.m_Procs = NULL ;
ap_hook_handler(configHandler, NULL, NULL, APR_HOOK_LAST); };
/* Our module name tag: */
module AP_MODULE_DECLARE_DATA mod_graphing = {
STANDARD20_MODULE_STUFF,
NULL, /* Per-directory configuration handler */
NULL, /* Merge handler for per-directory configurations */
NULL, /* Per-server configuration handler */
NULL, /* Merge handler for per-server configurations */
configDirectives, /* Any directives we may have for httpd */
register_hooks /* Our hook registering function */
};
Apologies for polluting the thread with this.
On Tue, 30 Jul 2019 at 16:55, Bill Moo <mookimo...@gmail.com> wrote:
>
> Well I have tired what you suggested Eric but to no avail so
> regrettably no further forward. I have even tried several variations
> in both the Location and Directory entries.
>
> The Apache2 install I have is stock on Ubuntu 18.04 so I don't think
> there are any proxying modules in place.
>
> Can you, or indeed anyone, tell me how I can write 'debug' output to
> either the console or one of the Apache logs please. If I can do this
> I'll at least be able to see if my code is being called prior to the
> DECLINE.
>
> On Tue, 30 Jul 2019 at 16:44, Eric Covener <cove...@gmail.com> wrote:
> >
> > On Tue, Jul 30, 2019 at 11:41 AM Bill Moo <mookimo...@gmail.com> wrote:
> > >
> > > Hey, thanks for the quick reply. But I'll be honest and confess to
> > > not knowing exactly what you are meaning. If I do understand
> > > correctly then the Location is correct but the Directory entry
> > > needs to be /var/www/html/info is this correct?
> >
> > Yes, it should be a full filesystem path -- if you need that kind
> > of section at all.
> > 2nd caveat -- proxy-like modules can short-circuit the mapping
> > altogether and no directory section may match.
