tmp: c++ で apache module 開発

##必要なパッケージのインストール
```
sudo apt-get install apache2-threaded-dev
sudo apt-get install g++
```

##サンプル用のモジュールを作成
###mod_cpphello.cpp
```
#include "ap_config.h"
#include "apr.h"
#include "apr_lib.h"
#include "apr_strings.h"
#include "apr_network_io.h"
#include "apr_want.h"
#include "httpd.h"
#include "http_config.h"
#include "http_core.h"
#include "http_request.h"
#include "http_protocol.h"
#include <string>

extern "C" module AP_MODULE_DECLARE_DATA cpphello_module;

typedef struct {
    char *hellomessage;
} cpphello_dir_config;

static void *cpphello_create_dir_config(apr_pool_t *p, char *path)
{
    cpphello_dir_config *cfg = (cpphello_dir_config *)apr_pcalloc(p, sizeof(cpphello_dir_config));
    cfg->hellomessage = (char *)"Hello World!";
    return cfg;
}

static int cpphello_handler(request_rec *r)
{
    cpphello_dir_config *cfg = (cpphello_dir_config *) ap_get_module_config(r->per_dir_config, &cpphello_module);
    std::string messagetosend = std::string("<html><p>") + std::string(cfg->hellomessage) + std::string("</p></html>\n");
    r->content_type = "text/html";
    if (!r->header_only) {
      ap_rputs(messagetosend.c_str(), r);
    }
    return OK;
}

static void register_hooks(apr_pool_t *p)
{
    ap_hook_handler(cpphello_handler,NULL,NULL,APR_HOOK_MIDDLE);
}

extern "C" {
    module AP_MODULE_DECLARE_DATA cpphello_module = {
  STANDARD20_MODULE_STUFF,
  cpphello_create_dir_config,
  NULL,
  NULL,
  NULL,
  NULL,
  register_hooks
 };
};
```
###Makefile
```
##
##  Makefile -- Build procedure for fast3lpoad Apache module
##
##  This is a C++ module so things have to be handled a little differently.

#   the used tools
APXS=apxs2
APACHECTL=apachectl

# Get all of apxs's internal values.
APXS_CC=`$(APXS) -q CC`   
APXS_TARGET=`$(APXS) -q TARGET`   
APXS_CFLAGS=`$(APXS) -q CFLAGS`   
APXS_SBINDIR=`$(APXS) -q SBINDIR`   
APXS_CFLAGS_SHLIB=`$(APXS) -q CFLAGS_SHLIB`   
APXS_INCLUDEDIR=`$(APXS) -q INCLUDEDIR`   
APXS_LD_SHLIB=`$(APXS) -q LD_SHLIB`
APXS_LIBEXECDIR=`$(APXS) -q LIBEXECDIR`
APXS_LDFLAGS_SHLIB=`$(APXS) -q LDFLAGS_SHLIB`
APXS_SYSCONFDIR=`$(APXS) -q SYSCONFDIR`
APXS_LIBS_SHLIB=`$(APXS) -q LIBS_SHLIB`

#   the default target
all: mod_cpphello.so

# compile the shared object file. use g++ instead of letting apxs call
# ld so we end up with the right c++ stuff. We do this in two steps,
# compile and link.

# compile
mod_cpphello.o: mod_cpphello.cpp
 g++ -c -fPIC -I$(APXS_INCLUDEDIR) -I/usr/include/apr-1/ $(APXS_CFLAGS) $(APXS_CFLAGS_SHLIB) -Wall -o $@ $<

# link
mod_cpphello.so: mod_cpphello.o 
 g++ -fPIC -shared -o $@ $< $(APXS_LIBS_SHLIB)

# install the shared object file into Apache 
install: all
 $(APXS) -i -a -n 'cpphello' mod_cpphello.so

# display the apxs variables
check_apxs_vars:
 @echo APXS_CC $(APXS_CC);\
 echo APXS_TARGET $(APXS_TARGET);\
 echo APXS_CFLAGS $(APXS_CFLAGS);\
 echo APXS_SBINDIR $(APXS_SBINDIR);\
 echo APXS_CFLAGS_SHLIB $(APXS_CFLAGS_SHLIB);\
 echo APXS_INCLUDEDIR $(APXS_INCLUDEDIR);\
 echo APXS_LD_SHLIB $(APXS_LD_SHLIB);\
 echo APXS_LIBEXECDIR $(APXS_LIBEXECDIR);\
 echo APXS_LDFLAGS_SHLIB $(APXS_LDFLAGS_SHLIB);\
 echo APXS_SYSCONFDIR $(APXS_SYSCONFDIR);\
 echo APXS_LIBS_SHLIB $(APXS_LIBS_SHLIB)

#   cleanup
clean:
 rm -f *.so *.o *~

#   install and activate shared object by reloading Apache to
#   force a reload of the shared object file
reload: install restart

#   the general Apache start/restart/stop
#   procedures
start:
 $(APACHECTL) start
restart:
 $(APACHECTL) restart
stop:
 $(APACHECTL) stop
```

##コンパイルしてインストール
```
sudo make install
sudo make stop
sudo make start
```

サイトを表示してみて
```
Hello World!
```
と表示されていたら成功

##参考
* <http://d.hatena.ne.jp/yutakikuchi/20131101/1383260489>
* <http://blog.enjoitech.jp/article/131>

tmp

Thursday, June 5, 2014

c++ で apache module 開発

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