2 Copyright (C) 2014 Carl Hetherington <cth@carlh.net>
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 #include <boost/function.hpp>
22 #include <boost/optional.hpp>
23 #include <boost/filesystem.hpp>
24 #include <curl/curl.h>
26 #include "scoped_temporary.h"
27 #include "compose.hpp"
28 #include "safe_stringstream.h"
34 using boost::optional;
35 using boost::function;
38 get_from_zip_url_data (void* buffer, size_t size, size_t nmemb, void* stream)
40 FILE* f = reinterpret_cast<FILE*> (stream);
41 return fwrite (buffer, size, nmemb, f);
44 /** @param url URL of ZIP file.
45 * @param file Filename within ZIP file.
46 * @param load Function passed a (temporary) filesystem path of the unpacked file.
49 get_from_zip_url (string url, string file, function<void (boost::filesystem::path)> load)
51 /* Download the ZIP file to temp_zip */
52 CURL* curl = curl_easy_init ();
53 curl_easy_setopt (curl, CURLOPT_URL, url.c_str ());
55 ScopedTemporary temp_zip;
56 FILE* f = temp_zip.open ("wb");
57 curl_easy_setopt (curl, CURLOPT_WRITEFUNCTION, get_from_zip_url_data);
58 curl_easy_setopt (curl, CURLOPT_WRITEDATA, f);
59 curl_easy_setopt (curl, CURLOPT_FTP_USE_EPSV, 0);
60 /* Maximum time is 20s */
61 curl_easy_setopt (curl, CURLOPT_TIMEOUT, 20);
63 CURLcode const cr = curl_easy_perform (curl);
66 curl_easy_cleanup (curl);
68 return String::compose (_("Download failed (%1/%2 error %3)"), url, file, cr);
71 /* Open the ZIP file and read `file' out of it */
73 struct zip* zip = zip_open (temp_zip.c_str(), 0, 0);
75 return optional<string> (_("Could not open downloaded ZIP file"));
78 struct zip_file* zip_file = zip_fopen (zip, file.c_str(), 0);
80 return optional<string> (_("Unexpected ZIP file contents"));
83 ScopedTemporary temp_cert;
84 f = temp_cert.open ("wb");
87 int const N = zip_fread (zip_file, buffer, sizeof (buffer));
88 fwrite (buffer, 1, N, f);
89 if (N < int (sizeof (buffer))) {
95 load (temp_cert.file ());
96 return optional<string> ();
101 ftp_ls_data (void* buffer, size_t size, size_t nmemb, void* data)
103 string* s = reinterpret_cast<string *> (data);
104 uint8_t* b = reinterpret_cast<uint8_t *> (buffer);
105 for (size_t i = 0; i < (size * nmemb); ++i) {
114 CURL* curl = curl_easy_init ();
116 return list<string> ();
119 if (url.substr (url.length() - 1, 1) != "/") {
122 curl_easy_setopt (curl, CURLOPT_URL, url.c_str ());
124 curl_easy_setopt (curl, CURLOPT_TIMEOUT, 20);
127 struct curl_slist* commands = 0;
128 commands = curl_slist_append (commands, "NLST");
129 curl_easy_setopt (curl, CURLOPT_POSTQUOTE, commands);
130 curl_easy_setopt (curl, CURLOPT_WRITEDATA, &ls_raw);
131 curl_easy_setopt (curl, CURLOPT_WRITEFUNCTION, ftp_ls_data);
132 curl_easy_setopt (curl, CURLOPT_FTP_USE_EPSV, 0);
133 CURLcode const r = curl_easy_perform (curl);
135 return list<string> ();
138 SafeStringStream s (ls_raw);
141 string const line = s.getline ();
142 if (line.length() > 55) {
143 string const file = line.substr (55);
144 if (file != "." && file != "..") {
150 curl_easy_cleanup (curl);