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
49
50
51
52
53
54
55
56
57
|
// Copyright 2016 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 <stdio.h>
#include <math.h>
#include <assert.h>
#include <emscripten/fetch.h>
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");
printf("fetch->status: %d\n", fetch->status);
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");
return 0;
}
|
