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/* libanode: the Anode C reference implementation
* Copyright (C) 2009-2010 Adam Ierymenko <adam.ierymenko@gmail.com>
*
* This program 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.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/stat.h>
#include "impl/types.h"
#include "impl/misc.h"
#include "impl/dictionary.h"
#include "impl/environment.h"
#include "impl/http_client.h"
#include "anode.h"
static const char *_MONTHS[12] = { "Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec" };
static const char *_DAYS_OF_WEEK[7] = { "Sun","Mon","Tue","Wed","Thu","Fri","Sat" };
static inline unsigned long get_file_time_for_http(const char *path,char *buf,unsigned int len)
{
struct stat st;
struct tm *gmt;
if (!stat(path,(struct stat *)&st)) {
gmt = gmtime(&st.st_mtime);
if (gmt) {
snprintf(buf,len,"%s, %d %s %d %d:%d:%d GMT",
_DAYS_OF_WEEK[gmt->tm_wday],
gmt->tm_mday,
_MONTHS[gmt->tm_mon],
(1900 + gmt->tm_year),
gmt->tm_hour,
gmt->tm_min,
gmt->tm_sec);
buf[len - 1] = (char)0;
return (unsigned long)st.st_size;
}
}
return 0;
}
struct AnodeZoneLookupJob
{
char cached_zone_file[2048];
struct AnodeDictionary *zone_dict;
AnodeZone zone;
void *ptr;
void (*zone_lookup_handler)(void *,const AnodeZone *,AnodeZoneFile *);
int had_cached_zone;
};
static void AnodeZone_lookup_http_handler(struct AnodeHttpClient *client)
{
char *data_tmp;
struct AnodeZoneLookupJob *job = (struct AnodeZoneLookupJob *)client->ptr[0];
FILE *zf;
if ((client->response.code == 200)&&(client->response.data_length > 0)) {
zf = fopen(job->cached_zone_file,"w");
if (zf) {
fwrite(client->response.data,1,client->response.data_length,zf);
fclose(zf);
}
data_tmp = (char *)malloc(client->response.data_length + 1);
Anode_memcpy((void *)data_tmp,client->response.data,client->response.data_length);
data_tmp[client->response.data_length] = (char)0;
AnodeDictionary_clear(job->zone_dict);
AnodeDictionary_read(
job->zone_dict,
data_tmp,
"\r\n",
"=",
";",
'\\',
1,1);
free((void *)data_tmp);
job->zone_lookup_handler(job->ptr,&job->zone,(AnodeZoneFile *)job->zone_dict);
} else if (job->had_cached_zone)
job->zone_lookup_handler(job->ptr,&job->zone,(AnodeZoneFile *)job->zone_dict);
else {
AnodeDictionary_destroy(job->zone_dict);
free((void *)job->zone_dict);
job->zone_lookup_handler(job->ptr,&job->zone,(AnodeZoneFile *)0);
}
free((void *)job);
AnodeHttpClient_free(client);
}
void AnodeZone_lookup(
AnodeTransportEngine *transport,
const AnodeZone *zone,
void *ptr,
void (*zone_lookup_handler)(void *,const AnodeZone *,AnodeZone *))
{
char cached_zones_folder[2048];
char cached_zone_file[2048];
char if_modified_since[256];
unsigned long file_size;
struct AnodeZoneLookupJob *job;
struct AnodeHttpClient *client;
char *file_data;
FILE *zf;
if (Anode_get_cache_sub("zones",cached_zones_folder,sizeof(cached_zones_folder))) {
snprintf(cached_zone_file,sizeof(cached_zone_file),"%s%c%.2x%.2x%.2x%.2x.z",cached_zones_folder,ANODE_PATH_SEPARATOR,(unsigned int)zone->bits[0],(unsigned int)zone->bits[1],(unsigned int)zone->bits[2],(unsigned int)zone->bits[3]);
cached_zone_file[sizeof(cached_zone_file)-1] = (char)0;
job = (struct AnodeZoneLookupJob *)malloc(sizeof(struct AnodeZoneLookupJob));
Anode_str_copy(job->cached_zone_file,cached_zone_file,sizeof(job->cached_zone_file));
job->zone_dict = (struct AnodeDictionary *)malloc(sizeof(struct AnodeDictionary));
AnodeDictionary_init(job->zone_dict,0);
job->zone.bits[0] = zone->bits[0];
job->zone.bits[1] = zone->bits[1];
job->zone.bits[2] = zone->bits[2];
job->zone.bits[3] = zone->bits[3];
job->ptr = ptr;
job->zone_lookup_handler = zone_lookup_handler;
job->had_cached_zone = 0;
client = AnodeHttpClient_new(transport);
Anode_str_copy(client->uri.scheme,"http",sizeof(client->uri.scheme));
snprintf(client->uri.host,sizeof(client->uri.host),"a--%.2x%.2x%.2x%.2x.net",(unsigned int)zone->bits[0],(unsigned int)zone->bits[1],(unsigned int)zone->bits[2],(unsigned int)zone->bits[3]);
client->uri.host[sizeof(client->uri.host)-1] = (char)0;
Anode_str_copy(client->uri.path,"/z",sizeof(client->uri.path));
client->handler = &AnodeZone_lookup_http_handler;
client->ptr[0] = job;
if ((file_size = get_file_time_for_http(cached_zone_file,if_modified_since,sizeof(if_modified_since)))) {
zf = fopen(cached_zone_file,"r");
if (zf) {
AnodeDictionary_put(&client->headers,"If-Modified-Since",if_modified_since);
file_data = (char *)malloc(file_size + 1);
if (fread((void *)file_data,1,file_size,zf)) {
file_data[file_size] = (char)0;
AnodeDictionary_read(
job->zone_dict,
file_data,
"\r\n",
"=",
";",
'\\',
1,1);
job->had_cached_zone = 1;
}
free((void *)file_data);
fclose(zf);
}
}
AnodeHttpClient_send(client);
} else zone_lookup_handler(ptr,zone,(AnodeZone *)0);
}
const char *AnodeZoneFile_get(AnodeZoneFile *zone,const char *key)
{
return AnodeDictionary_get((struct AnodeDictionary *)zone,key);
}
void AnodeZoneFile_free(AnodeZoneFile *zone)
{
AnodeDictionary_destroy((struct AnodeDictionary *)zone);
free((void *)zone);
}
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