从表面上看,你应该能够做到以下几点:
- 阅读斑背出数据库
- 使用
URL.createObjectURL()
的构造URL的BLOB
- 的URL指定给
audio
元素
- 可选:
URL.revokeObjectURL()
释放BLOB当它不再需要(例如,如果音频元素被赋予了新的URL)
例如:
<!DOCTYPE html>
<title>IndexedDB/Blob/URL Example</title>
<p>Select audio file here: <input type=file>
<p>Then play here: <audio controls></audio>
<script>
// When a file is selected...
document.querySelector('input[type="file"]').addEventListener('change', function(e) {
var file = e.target.files[0];
// Open the database connection.
var open = indexedDB.open('blob-test');
open.onupgradeneeded = function() {
// Define the database schema if necessary.
var db = open.result;
var store = db.createObjectStore('files');
};
open.onsuccess = function() {
var db = open.result;
var key = 1;
// Write file to DB
var tx = db.transaction('files', 'readwrite');
var store = tx.objectStore('files');
store.put(file, key);
// Later, read file back out of DB
var tx2 = db.transaction('files');
var store2 = tx2.objectStore('files');
var request = store2.get(key);
request.onsuccess = function(e) {
// Got the file!
var file = request.result;
// Construct a URL for it
var url = URL.createObjectURL(file);
// Update audio element with the URL
document.querySelector('audio').src = url;
};
};
});
</script>
..但是你仍然要测试无处不在。最近修复了一些错误,例如Android上的Chrome会对此产生影响(例如,https://crbug.com/227476)