我试图让一个脚本工作,它被称为 sfo.js .
repo 仅提到了这种用法:
keys = parse_sfo(Some_ArrayBuffer);
console.log(keys['TITLE']);
望向 sfo.js
, parse_sfo
有 sfoBytes
争论。由此我得出结论
sfoBytes
参数需要是文件字节的数组缓冲区。我试图制作一个将 SFO 文件解析为字节数组的脚本:
<script src="sfo.js"></script>
<script>
function stringToArrayBuffer(str) {
var buf = [];
for (var i=0, strLen=str.length; i<strLen; i++) {
buf[i] = str.charCodeAt(i);
}
console.log(buf);
return buf;
}
function testing(url) {
var request = new XMLHttpRequest();
request.open('GET', url, false);
request.send(null);
if (request.status === 200) {
console.log(request.response);
var response = request.response;
var array = stringToArrayBuffer(response);
return array;
} else {
alert('Error!');
}
}
var data = testing('param.sfo');
var sfo = parse_sfo(data);
</script>
这会在控制台中引发错误:Uncaught RangeError: byte length of Uint32Array should be a multiple of 4 at new Uint32Array (<anonymous>)
at readUint32At (sfo.js:20)
at parse_sfo (sfo.js:113)
at (index):29
我很确定我做错了什么。有人了解我如何使脚本正常工作吗?我有 param.sfo 的示例文件:https://filebin.net/gghosrp6u93jn7y8 (如果不允许链接到下载,请告诉我)
最佳答案
好的,最后是工作示例。
我发现了一个小 param.sfo互联网上的文件。
笔记:
function getSfoLocal(callback) {
// for now I use local file for testing
document.querySelector('input').addEventListener('change', function() {
var reader = new FileReader();
reader.onload = function() {
var arrayBuffer = this.result;
var array = new Uint8Array(arrayBuffer);
// var binaryString = String.fromCharCode.apply(null, array);
if (typeof callback === 'function') callback(array);
}
reader.readAsArrayBuffer(this.files[0]);
}, false);
}
function getSfoRemote(url, callback) {
var concatArrayBuffers = function(buffer1, buffer2) {
if (!buffer1) {
return buffer2;
} else if (!buffer2) {
return buffer1;
}
var tmp = new Uint8Array(buffer1.length + buffer2.length);
tmp.set(buffer1, 0);
tmp.set(buffer2, buffer1.byteLength);
return tmp.buffer;
};
fetch(url).then(res => {
const reader = res.body.getReader();
let charsReceived = 0;
let result = new Uint8Array;
reader.read().then(function processText({
done,
value
}) {
// Result objects contain two properties:
// done - true if the stream has already given you all its data.
// value - some data. Always undefined when done is true.
if (done) {
if (typeof callback === 'function') callback(result);
return result;
}
// value for fetch streams is a Uint8Array
charsReceived += value.length;
const chunk = value;
result = concatArrayBuffers(result, chunk);
// Read some more, and call this function again
return reader.read().then(processText);
});
});
}
function getSfo(type, url, callback) {
if (type === 'local') getSfoLocal(callback);
if (type === 'remote') getSfoRemote(url, callback);
}
getSfo('local', null, (data) => {
keys = parse_sfo(data);
console.log('LOCAL =', keys);
});
function goremote() {
getSfo('remote', 'https://srv-file9.gofile.io/download/Y0gVfw/PARAM.SFO', (data) => {
keys = parse_sfo(data);
console.log('REMOTE =', keys);
});
}
div { padding: 4px; }
<!--script src="https://rawcdn.githack.com/KuromeSan/sfo.js/c7aa8209785cc5a39c4231e683f6a2d1b1e91153/sfo.js" for="release"></script-->
<script src="https://raw.githack.com/KuromeSan/sfo.js/master/sfo.js" for="develop"></script>
<div>Local version: <input type="file" /></div>
<div>Remote version: <button onclick="goremote()">Go remote</button></div>
附言看来
gofile.io
我用于远程示例的服务有时不可见。如果您有 param.sfo 的永久链接,请告诉我。但现在我必须visit my file ,只有在那之后它才变得可见。
关于JavaScript - 文件到字节数组,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/63506575/