Fetch with STREAM_DATA instead of LOAD_TO_MEMORY

Author: joeyparrish

emulator-patches/fetch.c

@@ -61,14 +61,10 @@ static void free_fetch_context(FetchContext* ctx) {
 #if defined(__EMSCRIPTEN__)
 static void fetch_with_emscripten_success(emscripten_fetch_t* fetch) {
   FetchContext* ctx = (FetchContext*)fetch->userData;
-
   int http_status = fetch->status;
-  printf("Kinetoscope: url = %s, http status = %d\n", ctx->url, http_status);
-
   bool ok = http_status == 200 || http_status == 206;
-  if (ok) {
-    ctx->write_callback((char*)fetch->data, fetch->numBytes, 1, ctx->user_ctx);
-  }
+
+  printf("Kinetoscope: url = %s, http status = %d\n", ctx->url, http_status);
 
   if (ctx->done_callback) {
     ctx->done_callback(ok, ctx->user_ctx);
@@ -78,6 +74,16 @@ static void fetch_with_emscripten_success(emscripten_fetch_t* fetch) {
   emscripten_fetch_close(fetch);
 }
 
+static void fetch_with_emscripten_progress(emscripten_fetch_t* fetch) {
+  FetchContext* ctx = (FetchContext*)fetch->userData;
+  int http_status = fetch->status;
+  bool ok = http_status == 200 || http_status == 206;
+
+  if (ok) {
+    ctx->write_callback((char*)fetch->data, fetch->numBytes, 1, ctx->user_ctx);
+  }
+}
+
 static void fetch_with_emscripten_error(emscripten_fetch_t* fetch) {
   FetchContext* ctx = (FetchContext*)fetch->userData;
 
@@ -163,7 +169,7 @@ static void fetch_range_async(const char* url, size_t first_byte, size_t size,
   emscripten_fetch_attr_init(&fetch_attributes);
 
   strcpy(fetch_attributes.requestMethod, "GET");
-  fetch_attributes.attributes = EMSCRIPTEN_FETCH_LOAD_TO_MEMORY;
+  fetch_attributes.attributes = EMSCRIPTEN_FETCH_STREAM_DATA;
 
   if (ctx->range) {
     const char** headers = malloc(sizeof(char*) * 3);
@@ -178,6 +184,7 @@ static void fetch_range_async(const char* url, size_t first_byte, size_t size,
 
   fetch_attributes.userData = ctx;
   fetch_attributes.onsuccess = fetch_with_emscripten_success;
+  fetch_attributes.onprogress = fetch_with_emscripten_progress;
   fetch_attributes.onerror = fetch_with_emscripten_error;
 
   emscripten_fetch(&fetch_attributes, url);