2 Copyright (C) 2014-2015 Carl Hetherington <cth@carlh.net>
4 This file is part of DCP-o-matic.
6 DCP-o-matic is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 DCP-o-matic is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
21 #include "scoped_temporary.h"
22 #include "compose.hpp"
23 #include "exceptions.h"
25 #include <curl/curl.h>
27 #include <boost/function.hpp>
28 #include <boost/optional.hpp>
29 #include <boost/filesystem.hpp>
30 #include <boost/algorithm/string.hpp>
37 using boost::optional;
38 using boost::function;
39 using boost::algorithm::trim;
43 get_from_url_data (void* buffer, size_t size, size_t nmemb, void* stream)
45 FILE* f = reinterpret_cast<FILE*> (stream);
46 return fwrite (buffer, size, nmemb, f);
51 get_from_url (string url, bool pasv, ScopedTemporary& temp)
53 CURL* curl = curl_easy_init ();
54 curl_easy_setopt (curl, CURLOPT_URL, url.c_str());
56 FILE* f = temp.open ("w");
57 curl_easy_setopt (curl, CURLOPT_WRITEFUNCTION, get_from_url_data);
58 curl_easy_setopt (curl, CURLOPT_WRITEDATA, f);
59 curl_easy_setopt (curl, CURLOPT_FTP_USE_EPSV, 0);
60 curl_easy_setopt (curl, CURLOPT_FTP_USE_EPRT, 0);
62 curl_easy_setopt (curl, CURLOPT_FTPPORT, "-");
65 /* Maximum time is 20s */
66 curl_easy_setopt (curl, CURLOPT_TIMEOUT, 20);
68 CURLcode const cr = curl_easy_perform (curl);
71 curl_easy_cleanup (curl);
73 return String::compose (_("Download failed (%1 error %2)"), url, (int) cr);
76 return optional<string>();
80 get_from_url (string url, bool pasv, function<void (boost::filesystem::path)> load)
83 optional<string> e = get_from_url (url, pasv, temp);
88 return optional<string>();
91 /** @param url URL of ZIP file.
92 * @param file Filename within ZIP file.
93 * @param load Function passed a (temporary) filesystem path of the unpacked file.
96 get_from_zip_url (string url, string file, bool pasv, function<void (boost::filesystem::path)> load)
98 /* Download the ZIP file to temp_zip */
99 ScopedTemporary temp_zip;
100 optional<string> e = get_from_url (url, pasv, temp_zip);
105 /* Open the ZIP file and read `file' out of it */
107 #ifdef DCPOMATIC_HAVE_ZIP_SOURCE_T
108 /* This is the way to do it with newer versions of libzip, and is required on Windows.
109 The zip_source_t API is missing in the libzip versions shipped with Ubuntu 14.04,
110 Centos 6, Centos 7, Debian 7 and Debian 8.
113 FILE* zip_file = fopen_boost (temp_zip.file (), "rb");
115 return optional<string> (_("Could not open downloaded ZIP file"));
118 zip_source_t* zip_source = zip_source_filep_create (zip_file, 0, -1, 0);
120 return optional<string> (_("Could not open downloaded ZIP file"));
123 zip_t* zip = zip_open_from_source (zip_source, 0, 0);
125 return optional<string> (_("Could not open downloaded ZIP file"));
129 struct zip* zip = zip_open (temp_zip.c_str(), 0, 0);
132 struct zip_file* file_in_zip = zip_fopen (zip, file.c_str(), 0);
134 return optional<string> (_("Unexpected ZIP file contents"));
137 ScopedTemporary temp_cert;
138 FILE* f = temp_cert.open ("wb");
141 int const N = zip_fread (file_in_zip, buffer, sizeof (buffer));
142 fwrite (buffer, 1, N, f);
143 if (N < int (sizeof (buffer))) {
147 zip_fclose (file_in_zip);
151 load (temp_cert.file ());
152 return optional<string> ();