Specify no EPRT on FTP downloads. Fix request to CURL when not

using PASV.  Fix incorrect return value from ftp_ls_data.
Tidy Dolby fetching code a bit.  Fix sensitivity of Dolby
download button (#769).

2 files changed, 11 insertions, 5 deletions

diff --git a/src/lib/internet.cc b/src/lib/internet.cc
index 2b1e90ca7..1aaeccd36 100644
--- a/src/lib/internet.cc
+++ b/src/lib/internet.cc
@@ -49,7 +49,7 @@ get_from_zip_url_data (void* buffer, size_t size, size_t nmemb, void* stream)
  *  @param load Function passed a (temporary) filesystem path of the unpacked file.
  */
 optional<string>
-get_from_zip_url (string url, string file, function<void (boost::filesystem::path)> load)
+get_from_zip_url (string url, string file, bool pasv, function<void (boost::filesystem::path)> load)
 {
 	/* Download the ZIP file to temp_zip */
 	CURL* curl = curl_easy_init ();
@@ -60,6 +60,11 @@ get_from_zip_url (string url, string file, function<void (boost::filesystem::pat
 	curl_easy_setopt (curl, CURLOPT_WRITEFUNCTION, get_from_zip_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 (!pasv) {
+		curl_easy_setopt (curl, CURLOPT_FTPPORT, "-");
+	}
+
 	/* Maximum time is 20s */
 	curl_easy_setopt (curl, CURLOPT_TIMEOUT, 20);
 
@@ -99,7 +104,6 @@ get_from_zip_url (string url, string file, function<void (boost::filesystem::pat
 	return optional<string> ();
 }
 
-
 static size_t
 ftp_ls_data (void* buffer, size_t size, size_t nmemb, void* data)
 {
@@ -108,7 +112,7 @@ ftp_ls_data (void* buffer, size_t size, size_t nmemb, void* data)
 	for (size_t i = 0; i < (size * nmemb); ++i) {
 		*s += b[i];
 	}
-	return nmemb;
+	return size * nmemb;
 }
 
 list<string>
@@ -133,8 +137,10 @@ ftp_ls (string url, bool pasv)
 	curl_easy_setopt (curl, CURLOPT_WRITEDATA, &ls_raw);
 	curl_easy_setopt (curl, CURLOPT_WRITEFUNCTION, ftp_ls_data);
 	curl_easy_setopt (curl, CURLOPT_FTP_USE_EPSV, 0);
+	curl_easy_setopt (curl, CURLOPT_FTP_USE_EPRT, 0);
+	curl_easy_setopt (curl, CURLOPT_VERBOSE, 1);
 	if (!pasv) {
-		curl_easy_setopt (curl, CURLOPT_FTPPORT, "");
+		curl_easy_setopt (curl, CURLOPT_FTPPORT, "-");
 	}
 	CURLcode const r = curl_easy_perform (curl);
 	if (r != CURLE_OK) {
diff --git a/src/lib/internet.h b/src/lib/internet.h
index f46abc367..12b2ba3cd 100644
--- a/src/lib/internet.h
+++ b/src/lib/internet.h
@@ -21,5 +21,5 @@
 #include <boost/function.hpp>
 #include <boost/filesystem.hpp>
 
-boost::optional<std::string> get_from_zip_url (std::string url, std::string file, boost::function<void (boost::filesystem::path)> load);
+boost::optional<std::string> get_from_zip_url (std::string url, std::string file, bool pasv, boost::function<void (boost::filesystem::path)> load);
 std::list<std::string> ftp_ls (std::string dir, bool pasv = true);