Allocate memory for POST data on Fetch API

Otherwise it might get lost before it reaches the server.

1 files changed, 18 insertions, 2 deletions

diff --git a/registration.c b/registration.c
index 1693f09..3da97b8 100644
--- a/registration.c
+++ b/registration.c
@@ -1,10 +1,21 @@
 #ifdef __EMSCRIPTEN__
+#include <stdlib.h>
 #include <string.h>
 #include <emscripten/fetch.h>
 #else
 #include <curl/curl.h>
 #endif
 
+#ifdef __EMSCRIPTEN__
+
+static void cleanup(struct emscripten_fetch_t *fetch)
+{
+	free(fetch->userData);
+	emscripten_fetch_close(fetch);
+}
+
+#endif
+
 void sign_up(const char *brand, const char *certificate)
 {
 #ifdef __EMSCRIPTEN__
@@ -12,8 +23,13 @@ void sign_up(const char *brand, const char *certificate)
 	emscripten_fetch_attr_init(&attr);
 	attr.attributes = EMSCRIPTEN_FETCH_LOAD_TO_MEMORY;
 	strcpy(attr.requestMethod, "POST");
-	attr.requestData = brand;
-	attr.requestDataSize = strlen(brand) + 1;
+	char *data = malloc(strlen(brand) + 1);
+	strcpy(data, brand);
+	attr.requestData = data;
+	attr.requestDataSize = strlen(data) + 1;
+	attr.userData = data;
+	attr.onsuccess = cleanup;
+	attr.onerror = cleanup;
 	emscripten_fetch(&attr, "register");
 	(void)certificate;
 #else