File size: 1,797 Bytes
00df61d | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 | // Copyright 2025 The Emscripten Authors. All rights reserved.
// Emscripten is available under two separate licenses, the MIT license and the
// University of Illinois/NCSA Open Source License. Both these licenses can be
// found in the LICENSE file.
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <assert.h>
#include <emscripten.h>
#include <emscripten/fetch.h>
#include <emscripten/eventloop.h>
bool fetch_abort_queued = false;
int main() {
emscripten_fetch_attr_t attr;
emscripten_fetch_attr_init(&attr);
strcpy(attr.requestMethod, "GET");
attr.onsuccess = [](emscripten_fetch_t *fetch) {
printf("Finished downloading %llu bytes\n", fetch->totalBytes);
emscripten_fetch_close(fetch);
};
attr.onerror = [](emscripten_fetch_t *fetch) {
printf("Downloading failed with status code: %d.\n", fetch->status);
if (fetch->status != (uint16_t)-1) { // if not aborted with emscripten_fetch_close()
emscripten_fetch_close(fetch);
}
};
attr.onprogress = [](emscripten_fetch_t *fetch) {
printf("Downloading.. %.2f%s complete. Received chunk [%llu, %llu[\n",
(fetch->totalBytes > 0) ? ((fetch->dataOffset + fetch->numBytes) * 100.0 / fetch->totalBytes) : (double)(fetch->dataOffset + fetch->numBytes),
(fetch->totalBytes > 0) ? "%" : " bytes",
fetch->dataOffset,
fetch->dataOffset + fetch->numBytes);
if (fetch_abort_queued) return;
fetch_abort_queued = true;
emscripten_set_immediate([](void *arg) {
emscripten_fetch_t *fetch = (emscripten_fetch_t *)arg;
printf("Abort fetch when downloading\n");
emscripten_fetch_close(fetch);
}, fetch);
};
attr.attributes = EMSCRIPTEN_FETCH_LOAD_TO_MEMORY | EMSCRIPTEN_FETCH_STREAM_DATA;
emscripten_fetch(&attr, "largefile.txt");
}
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