C++ (Cpp) emscripten_fetch_attr_init Exemples

Exemple #1

Fichier : example_idb_delete.cpp Projet : Unity-Technologies/emscripten

int main()
{
  emscripten_fetch_attr_t attr;
  emscripten_fetch_attr_init(&attr);
  strcpy(attr.requestMethod, "EM_IDB_DELETE");
  emscripten_fetch(&attr, "filename_to_delete.dat");
}

Exemple #2

int main()
{
  emscripten_fetch_attr_t attr;
  emscripten_fetch_attr_init(&attr);
  attr.attributes = EMSCRIPTEN_FETCH_REPLACE | EMSCRIPTEN_FETCH_LOAD_TO_MEMORY | EMSCRIPTEN_FETCH_WAITABLE;
  emscripten_fetch_t *fetch = emscripten_fetch(&attr, "gears.png");
  assert(fetch != 0);
  memset(&attr, 0, sizeof(attr)); // emscripten_fetch() must be able to operate without referencing to this structure after the call.
  printf("Main thread waiting for fetch to finish...\n");
  emscripten_fetch_wait(fetch, INFINITY);
  printf("Main thread waiting for fetch to finish done...\n");
  assert(fetch->data != 0);
  assert(fetch->numBytes > 0);
  assert(fetch->totalBytes == fetch->numBytes);
  assert(fetch->readyState == 4/*DONE*/);
  assert(fetch->status == 200);

  uint8_t checksum = 0;
  for(int i = 0; i < fetch->numBytes; ++i)
    checksum ^= fetch->data[i];
  printf("Data checksum: %02X\n", checksum);
  assert(checksum == 0x08);
  emscripten_fetch_close(fetch);

#ifdef REPORT_RESULT
  REPORT_RESULT(0);
#endif
}

Exemple #3

Fichier : idb_delete.cpp Projet : WizardOfArc/emscripten

int main()
{
  // 1. Populate file to IndexedDB by a GET.
  emscripten_fetch_attr_t attr;
  emscripten_fetch_attr_init(&attr);
  strcpy(attr.requestMethod, "GET");
  attr.attributes = EMSCRIPTEN_FETCH_REPLACE | EMSCRIPTEN_FETCH_SYNCHRONOUS | EMSCRIPTEN_FETCH_PERSIST_FILE;
  emscripten_fetch_t *fetch = emscripten_fetch(&attr, "gears.png");
  assert(fetch->status == 200 && "Initial XHR GET of gears.png should have succeeded");
  emscripten_fetch_close(fetch);

  // 2. Make sure it is there.
  emscripten_fetch_attr_init(&attr);
  strcpy(attr.requestMethod, "GET");
  attr.attributes = EMSCRIPTEN_FETCH_NO_DOWNLOAD | EMSCRIPTEN_FETCH_SYNCHRONOUS | EMSCRIPTEN_FETCH_LOAD_TO_MEMORY;
  fetch = emscripten_fetch(&attr, "gears.png");
  assert(fetch->status == 200 && "emscripten_fetch from IndexedDB should have found the file");
  assert(fetch->numBytes > 0);
  assert(fetch->data != 0);
  emscripten_fetch_close(fetch);

  // 3. Delete the file from IndexedDB by invoking an Emscripten-specific request "EM_IDB_DELETE".
  emscripten_fetch_attr_init(&attr);
  strcpy(attr.requestMethod, "EM_IDB_DELETE");
  attr.attributes = EMSCRIPTEN_FETCH_SYNCHRONOUS;
  fetch = emscripten_fetch(&attr, "gears.png");
  assert(fetch->status == 200 && "Deleting the file from IndexedDB should have succeeded");
  assert(fetch->numBytes == 0);
  assert(fetch->data == 0);
  emscripten_fetch_close(fetch);

  // 4. Now try to get the file again from IndexedDB, and ensure it is no longer available.
  emscripten_fetch_attr_init(&attr);
  strcpy(attr.requestMethod, "GET");
  attr.attributes = EMSCRIPTEN_FETCH_NO_DOWNLOAD | EMSCRIPTEN_FETCH_SYNCHRONOUS | EMSCRIPTEN_FETCH_LOAD_TO_MEMORY;
  fetch = emscripten_fetch(&attr, "gears.png");
  assert(fetch->status == 404 && "Attempting to GET the file from IndexedDB again should have failed after the file has been deleted");
  assert(fetch->numBytes == 0);
  assert(fetch->data == 0);
  emscripten_fetch_close(fetch);

  printf("Test succeeded!\n");

#ifdef REPORT_RESULT
  REPORT_RESULT(0);
#endif
}

Exemple #4

Fichier : example_synchronous_fetch.cpp Projet : Unity-Technologies/emscripten

int main()
{
  emscripten_fetch_attr_t attr;
  emscripten_fetch_attr_init(&attr);
  strcpy(attr.requestMethod, "GET");
  attr.attributes = EMSCRIPTEN_FETCH_LOAD_TO_MEMORY | EMSCRIPTEN_FETCH_SYNCHRONOUS;
  emscripten_fetch_t *fetch = emscripten_fetch(&attr, "gears.png");
  
  if (result == 0) {
    result = 2;
    printf("emscripten_fetch() failed to run synchronously!\n");
  }
#ifdef REPORT_RESULT
    REPORT_RESULT();
#endif
}

Exemple #5

Fichier : to_indexeddb.cpp Projet : Unity-Technologies/emscripten

int main()
{
  emscripten_fetch_attr_t attr;
  emscripten_fetch_attr_init(&attr);
  strcpy(attr.requestMethod, "GET");
  attr.userData = (void*)0x12345678;
  attr.attributes = EMSCRIPTEN_FETCH_REPLACE | EMSCRIPTEN_FETCH_PERSIST_FILE;

  attr.onsuccess = [](emscripten_fetch_t *fetch) {
    assert(fetch);
    printf("Finished downloading %llu bytes\n", fetch->totalBytes);
    assert(fetch->url);
    assert(!strcmp(fetch->url, "gears.png"));
    assert(fetch->id != 0);
    assert((uintptr_t)fetch->userData == 0x12345678);
    assert(fetch->totalBytes == 6407);
    emscripten_fetch_close(fetch);

#ifdef REPORT_RESULT
    result = 1;
    REPORT_RESULT();
#endif
  };

  attr.onprogress = [](emscripten_fetch_t *fetch) {
    assert(fetch);
    if (fetch->status != 200) return;
    if (fetch->totalBytes > 0) {
      printf("Downloading.. %.2f%% complete.\n", (fetch->dataOffset + fetch->numBytes) * 100.0 / fetch->totalBytes);
    } else {
      printf("Downloading.. %lld bytes complete.\n", fetch->dataOffset + fetch->numBytes);
    }
  };

  attr.onerror = [](emscripten_fetch_t *fetch) {
    printf("Download failed!\n");
  };

  emscripten_fetch_t *fetch = emscripten_fetch(&attr, "gears.png");
  assert(fetch != 0);
  memset(&attr, 0, sizeof(attr)); // emscripten_fetch() must be able to operate without referencing to this structure after the call.
}