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#define ENABLE_IMPLICIT_FILEPATH_CONVERSIONS
#include "poddlthread.h"
#include <cstring>
#include <cinttypes>
#include <curl/curl.h>
#include <libgen.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/utsname.h>
#include <unistd.h>
#include "curlhandle.h"
#include "logger.h"
#include "utils.h"
using namespace newsboat;
namespace podboat {
static size_t my_write_data(void* buffer, size_t size, size_t nmemb,
void* userp);
static int progress_callback(void* clientp,
curl_off_t dltotal,
curl_off_t dlnow,
curl_off_t ultotal,
curl_off_t ulnow);
PodDlThread::PodDlThread(Download* dl_, newsboat::ConfigContainer& c)
: dl(dl_)
, f(new std::ofstream())
, bytecount(0)
, cfg(c)
{
}
PodDlThread::~PodDlThread() {}
void PodDlThread::operator()()
{
run();
}
void PodDlThread::run()
{
// are we resuming previous download?
bool resumed_download = false;
tv1 = std::chrono::steady_clock::now();
++bytecount;
CurlHandle handle;
utils::set_common_curl_options(handle, cfg);
curl_easy_setopt(handle.ptr(), CURLOPT_URL, dl->url().c_str());
curl_easy_setopt(handle.ptr(), CURLOPT_TIMEOUT, 0);
// set up write functions:
curl_easy_setopt(handle.ptr(), CURLOPT_WRITEFUNCTION, my_write_data);
curl_easy_setopt(handle.ptr(), CURLOPT_WRITEDATA, this);
// set up progress notification:
curl_easy_setopt(handle.ptr(), CURLOPT_NOPROGRESS, 0);
curl_easy_setopt(
handle.ptr(), CURLOPT_XFERINFOFUNCTION, progress_callback);
curl_easy_setopt(handle.ptr(), CURLOPT_XFERINFODATA, this);
// set up max download speed
int max_dl_speed = cfg.get_configvalue_as_int("max-download-speed");
if (max_dl_speed > 0) {
curl_easy_setopt(handle.ptr(),
CURLOPT_MAX_RECV_SPEED_LARGE,
(curl_off_t)(max_dl_speed * 1024));
}
struct stat sb;
Filepath filename =
dl->filename().join(newsboat::ConfigContainer::PARTIAL_FILE_SUFFIX);
if (stat(filename.to_locale_string().c_str(), &sb) == -1) {
LOG(Level::INFO,
"PodDlThread::run: stat failed: starting normal "
"download");
// Have to copy the string into a vector in order to be able to
// get a char* pointer. std::string::c_str() won't do because it
// returns const char*, whereas ::dirname() needs non-const.
std::vector<char> directory(filename.to_locale_string().begin(),
filename.to_locale_string().end());
directory.push_back('\0');
utils::mkdir_parents(dirname(&directory[0]));
f->open(filename, std::fstream::out);
dl->set_offset(0);
resumed_download = false;
} else {
LOG(Level::INFO,
"PodDlThread::run: stat ok: starting download from %" PRIi64,
// That field is `long int`, which is at least 32 bits. On x86_64,
// it's 64 bits. Thus, this cast is either a no-op, or an up-cast
// which are always safe.
static_cast<int64_t>(sb.st_size));
curl_easy_setopt(handle.ptr(), CURLOPT_RESUME_FROM, sb.st_size);
dl->set_offset(sb.st_size);
f->open(filename, std::fstream::out | std::fstream::app);
resumed_download = true;
}
if (f->is_open()) {
dl->set_status(DlStatus::DOWNLOADING);
CURLcode success = curl_easy_perform(handle.ptr());
f->close();
LOG(Level::INFO,
"PodDlThread::run: curl_easy_perform rc = %u (%s)",
success,
curl_easy_strerror(success));
if (0 == success) {
LOG(Level::DEBUG,
"PodDlThread::run: download complete, deleting "
"temporary suffix");
if (rename(filename.to_locale_string().c_str(),
dl->filename().to_locale_string().c_str()) == 0) {
dl->set_status(DlStatus::READY);
} else {
dl->set_status(DlStatus::RENAME_FAILED, strerror(errno));
}
} else if (dl->status() != DlStatus::CANCELLED) {
// attempt complete re-download
if (resumed_download) {
::unlink(filename.to_locale_string().c_str());
this->run();
} else {
dl->set_status(DlStatus::FAILED, curl_easy_strerror(success));
::unlink(filename.to_locale_string().c_str());
}
}
} else {
dl->set_status(DlStatus::FAILED, strerror(errno));
}
}
static size_t my_write_data(void* buffer, size_t size, size_t nmemb,
void* userp)
{
PodDlThread* thread = static_cast<PodDlThread*>(userp);
return thread->write_data(buffer, size, nmemb);
}
static int progress_callback(void* clientp,
curl_off_t dltotal,
curl_off_t dlnow,
curl_off_t /* ultotal */,
curl_off_t /*ulnow*/)
{
PodDlThread* thread = static_cast<PodDlThread*>(clientp);
return thread->progress(dlnow, dltotal);
}
size_t PodDlThread::write_data(void* buffer, size_t size, size_t nmemb)
{
if (dl->status() == DlStatus::CANCELLED) {
return 0;
}
f->write(static_cast<char*>(buffer), size * nmemb);
bytecount += (size * nmemb);
LOG(Level::DEBUG,
"PodDlThread::write_data: bad = %u size = %" PRIu64,
f->bad(),
static_cast<uint64_t>(size * nmemb));
return f->bad() ? 0 : size * nmemb;
}
int PodDlThread::progress(double dlnow, double dltotal)
{
if (dl->status() == DlStatus::CANCELLED) {
return -1;
}
tv2 = std::chrono::steady_clock::now();
const double kbps = compute_kbps();
dl->set_kbps(kbps);
dl->set_progress(dlnow, dltotal);
return 0;
}
double PodDlThread::compute_kbps()
{
using fpseconds = std::chrono::duration<double>;
const double elapsed = std::chrono::duration_cast<fpseconds>(tv2 - tv1).count();
const double result = (bytecount / elapsed) / 1024;
return result;
}
} // namespace podboat
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