premiere-libtorrent/examples/rss_reader.cpp

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#include "libtorrent/rss.hpp"
#include "libtorrent/session.hpp"
#include "libtorrent/bencode.hpp"
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#include <signal.h>
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using namespace libtorrent;
void print_feed(feed_status const& f)
{
printf("FEED: %s\n",f.url.c_str());
if (f.error)
printf("ERROR: %s\n", f.error.message().c_str());
printf(" %s\n %s\n", f.title.c_str(), f.description.c_str());
printf(" ttl: %d minutes\n", f.ttl);
for (std::vector<feed_item>::const_iterator i = f.items.begin()
, end(f.items.end()); i != end; ++i)
{
printf("\033[32m%s\033[0m\n------------------------------------------------------\n"
" url: %s\n size: %"PRId64"\n info-hash: %s\n uuid: %s\n description: %s\n"
" comment: %s\n category: %s\n"
, i->title.c_str(), i->url.c_str(), i->size
, i->info_hash.is_all_zeros() ? "" : to_hex(i->info_hash.to_string()).c_str()
, i->uuid.c_str(), i->description.c_str(), i->comment.c_str(), i->category.c_str());
}
}
std::string const& progress_bar(int progress, int width)
{
static std::string bar;
bar.clear();
bar.reserve(width + 10);
int progress_chars = (progress * width + 500) / 1000;
std::fill_n(std::back_inserter(bar), progress_chars, '#');
std::fill_n(std::back_inserter(bar), width - progress_chars, '-');
return bar;
}
int save_file(std::string const& filename, std::vector<char>& v)
{
using namespace libtorrent;
file f;
error_code ec;
if (!f.open(filename, file::write_only, ec)) return -1;
if (ec) return -1;
file::iovec_t b = {&v[0], v.size()};
size_type written = f.writev(0, &b, 1, ec);
if (written != int(v.size())) return -3;
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if (ec) return -3;
return 0;
}
volatile bool quit = false;
void sig(int num)
{
quit = true;
}
int main(int argc, char* argv[])
{
if ((argc == 2 && strcmp(argv[1], "--help") == 0) || argc > 2)
{
std::cerr << "usage: rss_reader [rss-url]\n";
return 0;
}
session ses;
session_settings sett;
sett.active_downloads = 2;
sett.active_seeds = 1;
sett.active_limit = 3;
ses.set_settings(sett);
std::vector<char> in;
error_code ec;
if (load_file(".ses_state", in, ec) == 0)
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{
lazy_entry e;
if (lazy_bdecode(&in[0], &in[0] + in.size(), e, ec) == 0)
ses.load_state(e);
}
feed_handle fh;
if (argc == 2)
{
feed_settings feed;
feed.url = argv[1];
feed.add_args.save_path = ".";
fh = ses.add_feed(feed);
fh.update_feed();
}
else
{
std::vector<feed_handle> handles;
ses.get_feeds(handles);
if (handles.empty())
{
printf("usage: rss_reader rss-url\n");
return 1;
}
fh = handles[0];
}
feed_status fs = fh.get_feed_status();
int i = 0;
char spinner[] = {'|', '/', '-', '\\'};
fprintf(stderr, "fetching feed ... %c", spinner[i]);
while (fs.updating)
{
sleep(100);
i = (i + 1) % 4;
fprintf(stderr, "\b%c", spinner[i]);
fs = fh.get_feed_status();
}
fprintf(stderr, "\bDONE\n");
print_feed(fs);
signal(SIGTERM, &sig);
signal(SIGINT, &sig);
while (!quit)
{
std::vector<torrent_handle> t = ses.get_torrents();
for (std::vector<torrent_handle>::iterator i = t.begin()
, end(t.end()); i != end; ++i)
{
torrent_status st = i->status();
std::string const& progress = progress_bar(st.progress_ppm / 1000, 40);
std::string name = i->name();
if (name.size() > 70) name.resize(70);
std::string error = st.error;
if (error.size() > 40) error.resize(40);
static char const* state_str[] =
{"checking (q)", "checking", "dl metadata"
, "downloading", "finished", "seeding", "allocating", "checking (r)"};
std::string status = st.paused ? "queued" : state_str[st.state];
int attribute = 0;
if (st.paused) attribute = 33;
else if (st.state == torrent_status::downloading) attribute = 1;
printf("\033[%dm%2d %-70s d:%-4d u:%-4d %-40s %4d(%4d) %-12s\033[0m\n"
, attribute, st.queue_position
, name.c_str(), st.download_rate / 1000
, st.upload_rate / 1000, !error.empty() ? error.c_str() : progress.c_str()
, st.num_peers, st.num_seeds, status.c_str());
}
sleep(500);
if (quit) break;
printf("\033[%dA", int(t.size()));
}
printf("saving session state\n");
{
entry session_state;
ses.save_state(session_state);
std::vector<char> out;
bencode(std::back_inserter(out), session_state);
save_file(".ses_state", out);
}
printf("closing session");
return 0;
}