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/*
This file is part of GNUnet.
Copyright (C) 2013 GNUnet e.V.
GNUnet is free software: you can redistribute it and/or modify it
under the terms of the GNU General Public License as published
by the Free Software Foundation, either version 3 of the License,
or (at your option) any later version.
GNUnet is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Affero General Public License for more details.
*/
/**
* @file gns/gnunet-bcd.c
* @author Christian Grothoff
* @brief HTTP server to create GNS business cards
*/
#include "platform.h"
#include <microhttpd.h>
#include "gnunet_util_lib.h"
/**
* Error page to display if submitted GNS key is invalid.
*/
#define INVALID_GNSKEY "<html><head><title>Error</title><body>Invalid GNS public key given.</body></html>"
/**
* Error page to display on 404.
*/
#define NOT_FOUND "<html><head><title>Error</title><body>404 not found</body></html>"
/**
* Handle to the HTTP server as provided by libmicrohttpd
*/
static struct MHD_Daemon *daemon_handle;
/**
* Our configuration.
*/
static const struct GNUNET_CONFIGURATION_Handle *cfg;
/**
* Our primary task for the HTTPD.
*/
static struct GNUNET_SCHEDULER_Task * http_task;
/**
* Our main website.
*/
static struct MHD_Response *main_response;
/**
* Error: invalid gns key.
*/
static struct MHD_Response *invalid_gnskey_response;
/**
* Error: 404
*/
static struct MHD_Response *not_found_response;
/**
* Absolute name of the 'gns-bcd.tex' file.
*/
static char *resfile;
/**
* Port number.
*/
static uint16_t port = 8888;
struct Entry
{
const char *formname;
const char *texname;
};
/**
* Main request handler.
*/
static int
access_handler_callback (void *cls,
struct MHD_Connection *connection,
const char *url,
const char *method,
const char *version,
const char *upload_data,
size_t * upload_data_size,
void **con_cls)
{
static int dummy;
static const struct Entry map[] = {
{ "prefix", "prefix" },
{ "name", "name" },
{ "suffix", "suffix" },
{ "street", "street" },
{ "city", "city" },
{ "phone", "phone" },
{ "fax", "fax" },
{ "email", "email"},
{ "homepage", "homepage" },
{ "orga", "orga"},
{ "departmenti18n", "departmentde"},
{ "departmenten", "departmenten"},
{ "subdepartmenti18n", "subdepartmentde"},
{ "subdepartmenten", "subdepartmenten"},
{ "jobtitlei18n", "jobtitlegerman"},
{ "jobtitleen", "jobtitleenglish"},
{ "subdepartmenten", "subdepartmenten"},
{ NULL, NULL }
};
if (0 != strcmp (method, MHD_HTTP_METHOD_GET))
{
GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
_("Refusing `%s' request to HTTP server\n"),
method);
return MHD_NO;
}
if (NULL == *con_cls)
{
(*con_cls) = &dummy;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Sending 100 CONTINUE reply\n");
return MHD_YES; /* send 100 continue */
}
if (0 == strcasecmp (url, "/"))
return MHD_queue_response (connection,
MHD_HTTP_OK,
main_response);
if (0 == strcasecmp (url, "/submit.pdf"))
{
unsigned int i;
char *p;
char *tmp;
char *deffile;
struct GNUNET_CRYPTO_EcdsaPublicKey pub;
size_t slen;
FILE *f;
struct stat st;
struct MHD_Response *response;
int fd;
int ret;
const char *gpg_fp = MHD_lookup_connection_value (connection,
MHD_GET_ARGUMENT_KIND,
"gpgfingerprint");
const char *gns_nick = MHD_lookup_connection_value (connection,
MHD_GET_ARGUMENT_KIND,
"gnsnick");
const char *gnskey = MHD_lookup_connection_value (connection,
MHD_GET_ARGUMENT_KIND,
"gnskey");
if ( (NULL == gnskey) ||
(GNUNET_OK !=
GNUNET_CRYPTO_ecdsa_public_key_from_string (gnskey,
strlen (gnskey),
&pub)))
{
return MHD_queue_response (connection,
MHD_HTTP_OK,
invalid_gnskey_response);
}
tmp = GNUNET_DISK_mkdtemp (gnskey);
if (NULL == tmp)
{
GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR, "mktemp", gnskey);
return MHD_NO;
}
GNUNET_asprintf (&deffile,
"%s%s%s",
tmp, DIR_SEPARATOR_STR, "def.tex");
f = FOPEN (deffile, "w");
if (NULL == f)
{
GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR, "open", deffile);
GNUNET_free (deffile);
GNUNET_DISK_directory_remove (tmp);
GNUNET_free (tmp);
return MHD_NO;
}
for (i=0; NULL != map[i].formname; i++)
{
const char *val = MHD_lookup_connection_value (connection,
MHD_GET_ARGUMENT_KIND,
map[i].formname);
if (NULL != val)
FPRINTF (f,
"\\def\\%s{%s}\n",
map[i].texname, val);
else
FPRINTF (f,
"\\def\\%s{}\n",
map[i].texname);
}
if (NULL != gpg_fp)
{
char *gpg1;
char *gpg2;
slen = strlen (gpg_fp);
gpg1 = GNUNET_strndup (gpg_fp, slen / 2);
gpg2 = GNUNET_strdup (&gpg_fp[slen / 2]);
FPRINTF (f,
"\\def\\gpglineone{%s}\n\\def\\gpglinetwo{%s}\n",
gpg1, gpg2);
GNUNET_free (gpg2);
GNUNET_free (gpg1);
}
FPRINTF (f,
"\\def\\gns{%s/%s}\n",
gnskey,
(NULL == gns_nick) ? "" : gns_nick);
FCLOSE (f);
GNUNET_asprintf (&p,
"cd %s; cp %s gns-bcd.tex | pdflatex --enable-write18 gns-bcd.tex > /dev/null 2> /dev/null",
tmp,
resfile);
GNUNET_free (deffile);
ret = system (p);
if (WIFSIGNALED (ret) || (0 != WEXITSTATUS(ret)))
GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR,
"system",
p);
GNUNET_asprintf (&deffile,
"%s%s%s",
tmp, DIR_SEPARATOR_STR, "gns-bcd.pdf");
fd = OPEN (deffile, O_RDONLY);
if (-1 == fd)
{
GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR,
"open",
deffile);
GNUNET_free (deffile);
GNUNET_free (p);
GNUNET_DISK_directory_remove (tmp);
GNUNET_free (tmp);
return MHD_NO;
}
GNUNET_break (0 == STAT (deffile, &st));
if (NULL == (response = MHD_create_response_from_fd ((size_t) st.st_size, fd)))
{
GNUNET_break (0);
GNUNET_break (0 == CLOSE (fd));
GNUNET_free (deffile);
GNUNET_free (p);
GNUNET_DISK_directory_remove (tmp);
GNUNET_free (tmp);
return MHD_NO;
}
(void) MHD_add_response_header (response,
MHD_HTTP_HEADER_CONTENT_TYPE,
"application/pdf");
ret = MHD_queue_response (connection,
MHD_HTTP_OK,
response);
MHD_destroy_response (response);
GNUNET_free (deffile);
GNUNET_free (p);
GNUNET_DISK_directory_remove (tmp);
GNUNET_free (tmp);
return ret;
}
return MHD_queue_response (connection,
MHD_HTTP_NOT_FOUND,
not_found_response);
}
/**
* Function that queries MHD's select sets and
* starts the task waiting for them.
*/
static struct GNUNET_SCHEDULER_Task *
prepare_daemon (struct MHD_Daemon *daemon_handle);
/**
* Call MHD to process pending requests and then go back
* and schedule the next run.
*/
static void
run_daemon (void *cls)
{
struct MHD_Daemon *daemon_handle = cls;
http_task = NULL;
GNUNET_assert (MHD_YES == MHD_run (daemon_handle));
http_task = prepare_daemon (daemon_handle);
}
/**
* Function that queries MHD's select sets and
* starts the task waiting for them.
*/
static struct GNUNET_SCHEDULER_Task *
prepare_daemon (struct MHD_Daemon *daemon_handle)
{
struct GNUNET_SCHEDULER_Task * ret;
fd_set rs;
fd_set ws;
fd_set es;
struct GNUNET_NETWORK_FDSet *wrs;
struct GNUNET_NETWORK_FDSet *wws;
int max;
MHD_UNSIGNED_LONG_LONG timeout;
int haveto;
struct GNUNET_TIME_Relative tv;
FD_ZERO (&rs);
FD_ZERO (&ws);
FD_ZERO (&es);
wrs = GNUNET_NETWORK_fdset_create ();
wws = GNUNET_NETWORK_fdset_create ();
max = -1;
GNUNET_assert (MHD_YES == MHD_get_fdset (daemon_handle, &rs, &ws, &es, &max));
haveto = MHD_get_timeout (daemon_handle, &timeout);
if (haveto == MHD_YES)
tv.rel_value_us = (uint64_t) timeout * 1000LL;
else
tv = GNUNET_TIME_UNIT_FOREVER_REL;
GNUNET_NETWORK_fdset_copy_native (wrs, &rs, max + 1);
GNUNET_NETWORK_fdset_copy_native (wws, &ws, max + 1);
ret =
GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_HIGH,
tv, wrs, wws,
&run_daemon, daemon_handle);
GNUNET_NETWORK_fdset_destroy (wrs);
GNUNET_NETWORK_fdset_destroy (wws);
return ret;
}
/**
* Start server offering our hostlist.
*
* @return #GNUNET_OK on success
*/
static int
server_start ()
{
if (0 == port)
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
_("Invalid port number %u. Exiting.\n"),
port);
return GNUNET_SYSERR;
}
GNUNET_log (GNUNET_ERROR_TYPE_INFO,
_("Businesscard HTTP server starts on %u\n"),
port);
daemon_handle = MHD_start_daemon (MHD_USE_DUAL_STACK | MHD_USE_DEBUG,
port,
NULL /* accept_policy_callback */, NULL,
&access_handler_callback, NULL,
MHD_OPTION_CONNECTION_LIMIT, (unsigned int) 512,
MHD_OPTION_PER_IP_CONNECTION_LIMIT, (unsigned int) 2,
MHD_OPTION_CONNECTION_TIMEOUT, (unsigned int) 60,
MHD_OPTION_CONNECTION_MEMORY_LIMIT, (size_t) (16 * 1024),
MHD_OPTION_END);
if (NULL == daemon_handle)
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
_("Could not start businesscard HTTP server on port %u\n"),
(unsigned int) port);
return GNUNET_SYSERR;
}
http_task = prepare_daemon (daemon_handle);
return GNUNET_OK;
}
/**
* Stop HTTP server.
*/
static void
server_stop (void *cls)
{
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"HTTP server shutdown\n");
if (NULL != http_task)
{
GNUNET_SCHEDULER_cancel (http_task);
http_task = NULL;
}
if (NULL != daemon_handle)
{
MHD_stop_daemon (daemon_handle);
daemon_handle = NULL;
}
if (NULL != main_response)
{
MHD_destroy_response (main_response);
main_response = NULL;
}
if (NULL != invalid_gnskey_response)
{
MHD_destroy_response (invalid_gnskey_response);
invalid_gnskey_response = NULL;
}
if (NULL != not_found_response)
{
MHD_destroy_response (not_found_response);
not_found_response = NULL;
}
if (NULL != resfile)
{
GNUNET_free (resfile);
resfile = NULL;
}
}
/**
* Main function that will be run.
*
* @param cls closure
* @param args remaining command-line arguments
* @param cfgfile name of the configuration file used (for saving, can be NULL!)
* @param c configuration
*/
static void
run (void *cls,
char *const *args,
const char *cfgfile,
const struct GNUNET_CONFIGURATION_Handle *c)
{
struct stat st;
char *dir;
char *fn;
int fd;
cfg = c;
dir = GNUNET_OS_installation_get_path (GNUNET_OS_IPK_DATADIR);
GNUNET_assert (NULL != dir);
GNUNET_asprintf (&fn,
"%s%s%s",
dir,
DIR_SEPARATOR_STR,
"gns-bcd.html");
GNUNET_asprintf (&resfile,
"%s%s%s",
dir,
DIR_SEPARATOR_STR,
"gns-bcd.tex");
GNUNET_free (dir);
fd = OPEN (fn, O_RDONLY);
if (-1 == fd)
{
GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR,
"open",
fn);
GNUNET_free (fn);
return;
}
if (0 != STAT (fn, &st))
{
GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR,
"open",
fn);
GNUNET_free (fn);
CLOSE (fd);
return;
}
GNUNET_free (fn);
if (NULL == (main_response = MHD_create_response_from_fd ((size_t) st.st_size, fd)))
{
GNUNET_break (0);
GNUNET_break (0 == CLOSE (fd));
return;
}
(void) MHD_add_response_header (main_response,
MHD_HTTP_HEADER_CONTENT_TYPE,
"text/html");
invalid_gnskey_response = MHD_create_response_from_buffer (strlen (INVALID_GNSKEY),
INVALID_GNSKEY,
MHD_RESPMEM_PERSISTENT);
(void) MHD_add_response_header (invalid_gnskey_response,
MHD_HTTP_HEADER_CONTENT_TYPE,
"text/html");
not_found_response = MHD_create_response_from_buffer (strlen (NOT_FOUND),
NOT_FOUND,
MHD_RESPMEM_PERSISTENT);
(void) MHD_add_response_header (not_found_response,
MHD_HTTP_HEADER_CONTENT_TYPE,
"text/html");
if (GNUNET_OK !=
server_start ())
return;
GNUNET_SCHEDULER_add_shutdown (&server_stop,
NULL);
}
/**
* The main function for gnunet-gns.
*
* @param argc number of arguments from the command line
* @param argv command line arguments
* @return 0 ok, 1 on error
*/
int
main (int argc, char *const *argv)
{
struct GNUNET_GETOPT_CommandLineOption options[] = {
GNUNET_GETOPT_option_uint16 ('p',
"port",
"PORT",
gettext_noop ("Run HTTP serve on port PORT (default is 8888)"),
&port),
GNUNET_GETOPT_OPTION_END
};
int ret;
if (GNUNET_OK !=
GNUNET_STRINGS_get_utf8_args (argc, argv, &argc, &argv))
return 2;
GNUNET_log_setup ("gnunet-bcd", "WARNING", NULL);
ret =
(GNUNET_OK ==
GNUNET_PROGRAM_run (argc, argv, "gnunet-bcd",
_("GNUnet HTTP server to create business cards"),
options,
&run, NULL)) ? 0 : 1;
GNUNET_free ((void*) argv);
return ret;
}
/* end of gnunet-bcd.c */
|
