Don't say 'certificate downloaded' if it failed during the read part.

Backported from 8c7ad603cf0a534abe1a920b70b0daa095257d3a in v2.15.x

4 files changed, 16 insertions, 13 deletions

diff --git a/src/lib/internet.cc b/src/lib/internet.cc
index e0af49b66..8721c1b73 100644
--- a/src/lib/internet.cc
+++ b/src/lib/internet.cc
@@ -79,24 +79,25 @@ get_from_url (string url, bool pasv, bool skip_pasv_ip, ScopedTemporary& temp)
 	return optional<string>();
 }
 
+
 optional<string>
-get_from_url (string url, bool pasv, bool skip_pasv_ip, function<void (boost::filesystem::path)> load)
+get_from_url (string url, bool pasv, bool skip_pasv_ip, function<optional<string> (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>();
+	return load (temp.file());
 }
 
+
 /** @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)
+get_from_zip_url (string url, string file, bool pasv, bool skip_pasv_ip, function<optional<string> (boost::filesystem::path)> load)
 {
 	/* Download the ZIP file to temp_zip */
 	ScopedTemporary temp_zip;
@@ -153,6 +154,5 @@ get_from_zip_url (string url, string file, bool pasv, bool skip_pasv_ip, functio
 	zip_close (zip);
 	temp_cert.close ();
 
-	load (temp_cert.file ());
-	return optional<string> ();
+	return load (temp_cert.file());
 }
diff --git a/src/lib/internet.h b/src/lib/internet.h
index 125533b5d..da0bfc005 100644
--- a/src/lib/internet.h
+++ b/src/lib/internet.h
@@ -1,5 +1,5 @@
 /*
-    Copyright (C) 2014-2019 Carl Hetherington <cth@carlh.net>
+    Copyright (C) 2014-2020 Carl Hetherington <cth@carlh.net>
 
     This file is part of DCP-o-matic.
 
@@ -25,5 +25,5 @@
 class ScopedTemporary;
 
 boost::optional<std::string> get_from_url (std::string url, bool pasv, bool skip_pasv_ip, ScopedTemporary& temp);
-boost::optional<std::string> get_from_url (std::string url, bool pasv, bool skip_pasv_ip, boost::function<void (boost::filesystem::path)> load);
-boost::optional<std::string> get_from_zip_url (std::string url, std::string file, bool pasv, bool skip_pasv_ip, boost::function<void (boost::filesystem::path)> load);
+boost::optional<std::string> get_from_url (std::string url, bool pasv, bool skip_pasv_ip, boost::function<boost::optional<std::string> (boost::filesystem::path)> load);
+boost::optional<std::string> get_from_zip_url (std::string url, std::string file, bool pasv, bool skip_pasv_ip, boost::function<boost::optional<std::string> (boost::filesystem::path)> load);
diff --git a/src/wx/download_certificate_panel.cc b/src/wx/download_certificate_panel.cc
index 2f3b435ef..461c68966 100644
--- a/src/wx/download_certificate_panel.cc
+++ b/src/wx/download_certificate_panel.cc
@@ -1,5 +1,5 @@
 /*
-    Copyright (C) 2014-2018 Carl Hetherington <cth@carlh.net>
+    Copyright (C) 2014-2020 Carl Hetherington <cth@carlh.net>
 
     This file is part of DCP-o-matic.
 
@@ -22,10 +22,12 @@
 #include "download_certificate_panel.h"
 #include "download_certificate_dialog.h"
 #include "lib/signal_manager.h"
+#include "lib/compose.hpp"
 #include <dcp/util.h>
 #include <dcp/exceptions.h>
 #include <boost/bind.hpp>
 
+using std::string;
 using boost::function;
 using boost::optional;
 
@@ -51,14 +53,15 @@ DownloadCertificatePanel::DownloadCertificatePanel (DownloadCertificateDialog* d
 	_overall_sizer->SetSizeHints (this);
 }
 
-void
+optional<string>
 DownloadCertificatePanel::load (boost::filesystem::path file)
 {
 	try {
 		_certificate = dcp::Certificate (dcp::file_to_string (file));
 	} catch (dcp::MiscError& e) {
-		error_dialog (this, _("Could not read certificate file."), std_to_wx(e.what()));
+		return String::compose(wx_to_std(_("Could not read certificate file (%1)")), e.what());
 	}
+	return optional<string>();
 }
 
 optional<dcp::Certificate>
diff --git a/src/wx/download_certificate_panel.h b/src/wx/download_certificate_panel.h
index 55594c74c..dee76c435 100644
--- a/src/wx/download_certificate_panel.h
+++ b/src/wx/download_certificate_panel.h
@@ -37,7 +37,7 @@ public:
 	virtual bool ready_to_download () const;
 
 	void download ();
-	void load (boost::filesystem::path);
+	boost::optional<std::string> load (boost::filesystem::path);
 	boost::optional<dcp::Certificate> certificate () const;
 
 protected: