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/*
Copyright (C) 2014-2019 Carl Hetherington <cth@carlh.net>
This file is part of DCP-o-matic.
DCP-o-matic 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 2 of the License, or
(at your option) any later version.
DCP-o-matic 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 DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
*/
#include "scoped_temporary.h"
#include "compose.hpp"
#include "exceptions.h"
#include "cross.h"
#include "util.h"
#include <curl/curl.h>
#include <zip.h>
#include <boost/function.hpp>
#include <boost/optional.hpp>
#include <boost/filesystem.hpp>
#include <boost/algorithm/string.hpp>
#include <string>
#include "i18n.h"
using std::string;
using std::list;
using boost::optional;
using boost::function;
using boost::algorithm::trim;
static size_t
ls_url_data (void* buffer, size_t size, size_t nmemb, void* output)
{
string* s = reinterpret_cast<string*>(output);
char* c = reinterpret_cast<char*>(buffer);
for (size_t i = 0; i < (size * nmemb); ++i) {
*s += c[i];
}
return nmemb;
}
list<string>
ls_url (string url)
{
CURL* curl = curl_easy_init ();
curl_easy_setopt (curl, CURLOPT_URL, url.c_str());
curl_easy_setopt (curl, CURLOPT_DIRLISTONLY, 1);
string ls;
curl_easy_setopt (curl, CURLOPT_WRITEFUNCTION, ls_url_data);
curl_easy_setopt (curl, CURLOPT_WRITEDATA, &ls);
CURLcode const cr = curl_easy_perform (curl);
if (cr != CURLE_OK) {
return list<string>();
}
list<string> result;
result.push_back("");
for (size_t i = 0; i < ls.size(); ++i) {
if (ls[i] == '\n') {
result.push_back("");
} else {
result.back() += ls[i];
}
}
result.pop_back ();
return result;
}
static size_t
get_from_url_data (void* buffer, size_t size, size_t nmemb, void* stream)
{
FILE* f = reinterpret_cast<FILE*> (stream);
return fwrite (buffer, size, nmemb, f);
}
optional<string>
get_from_url (string url, bool pasv, bool skip_pasv_ip, ScopedTemporary& temp)
{
CURL* curl = curl_easy_init ();
curl_easy_setopt (curl, CURLOPT_URL, url.c_str());
FILE* f = temp.open ("wb");
curl_easy_setopt (curl, CURLOPT_WRITEFUNCTION, get_from_url_data);
curl_easy_setopt (curl, CURLOPT_WRITEDATA, f);
curl_easy_setopt (curl, CURLOPT_FTP_USE_EPSV, 0);
curl_easy_setopt (curl, CURLOPT_FTP_USE_EPRT, 0);
if (skip_pasv_ip) {
curl_easy_setopt (curl, CURLOPT_FTP_SKIP_PASV_IP, 1);
}
if (!pasv) {
curl_easy_setopt (curl, CURLOPT_FTPPORT, "-");
}
/* Maximum time is 20s */
curl_easy_setopt (curl, CURLOPT_TIMEOUT, 20);
CURLcode const cr = curl_easy_perform (curl);
temp.close ();
curl_easy_cleanup (curl);
if (cr != CURLE_OK) {
return String::compose (_("Download failed (%1 error %2)"), url, (int) cr);
}
return optional<string>();
}
optional<string>
get_from_url (string url, bool pasv, bool skip_pasv_ip, function<void (boost::filesystem::path)> load)
{
ScopedTemporary temp;
optional<string> e = get_from_url (url, pasv, skip_pasv_ip, temp);
if (e) {
return e;
}
load (temp.file());
return optional<string>();
}
/** @param url URL of ZIP file.
* @param file Filename within ZIP file.
* @param load Function passed a (temporary) filesystem path of the unpacked file.
*/
optional<string>
get_from_zip_url (string url, string file, bool pasv, bool skip_pasv_ip, function<void (boost::filesystem::path)> load)
{
/* Download the ZIP file to temp_zip */
ScopedTemporary temp_zip;
optional<string> e = get_from_url (url, pasv, skip_pasv_ip, temp_zip);
if (e) {
return e;
}
/* Open the ZIP file and read `file' out of it */
#ifdef DCPOMATIC_HAVE_ZIP_SOURCE_T
/* This is the way to do it with newer versions of libzip, and is required on Windows.
The zip_source_t API is missing in the libzip versions shipped with Ubuntu 14.04,
Centos 6, Centos 7, Debian 7 and Debian 8.
*/
FILE* zip_file = fopen_boost (temp_zip.file (), "rb");
if (!zip_file) {
return optional<string> (_("Could not open downloaded ZIP file"));
}
zip_source_t* zip_source = zip_source_filep_create (zip_file, 0, -1, 0);
if (!zip_source) {
return optional<string> (_("Could not open downloaded ZIP file"));
}
zip_error_t error;
zip_error_init (&error);
zip_t* zip = zip_open_from_source (zip_source, ZIP_RDONLY, &error);
if (!zip) {
return String::compose (_("Could not open downloaded ZIP file (%1:%2: %3)"), error.zip_err, error.sys_err, error.str ? error.str : "");
}
#else
struct zip* zip = zip_open (temp_zip.c_str(), 0, 0);
#endif
struct zip_file* file_in_zip = zip_fopen (zip, file.c_str(), 0);
if (!file_in_zip) {
return optional<string> (_("Unexpected ZIP file contents"));
}
ScopedTemporary temp_cert;
FILE* f = temp_cert.open ("wb");
char buffer[4096];
while (true) {
int const N = zip_fread (file_in_zip, buffer, sizeof (buffer));
checked_fwrite (buffer, N, f, temp_cert.file());
if (N < int (sizeof (buffer))) {
break;
}
}
zip_fclose (file_in_zip);
zip_close (zip);
temp_cert.close ();
load (temp_cert.file ());
return optional<string> ();
}
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