Escape download link

include/util/request.hpp

@@ -18,5 +18,6 @@ enum RequestMethod {
 json_t *requestJson(RequestMethod method, std::string url, json_t *dataJ);
 /** Returns the filename, blank if unsuccessful */
 bool requestDownload(std::string url, std::string filename, float *progress);
+std::string requestEscape(std::string s);
 
 } // namespace rack

src/plugin.cpp

@@ -237,9 +237,9 @@ static void refreshPurchase(json_t *pluginJ) {
 	url += "?product=";
 	url += slug;
 	url += "&version=";
-	url += gApplicationVersion;
+	url += requestEscape(gApplicationVersion);
 	url += "&token=";
-	url += gToken;
+	url += requestEscape(gToken);
 
 	// If plugin is not loaded, download the zip file to /plugins
 	downloadName = name;

src/util/request.cpp

@@ -143,5 +143,15 @@ bool requestDownload(std::string url, std::string filename, float *progress) {
 	return res == CURLE_OK;
 }
 
+std::string requestEscape(std::string s) {
+	CURL *curl = curl_easy_init();
+	assert(curl);
+	char *escaped = curl_easy_escape(curl, s.c_str(), s.size());
+	std::string ret = escaped;
+	curl_free(escaped);
+	curl_easy_cleanup(curl);
+	return ret;
+}
+
 
 } // namespace rack