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我爲本地文件處理創建了一個測試,但無法獲得「文件」類型以返回Chrome或Firefox中的任何內容。 Chrome不會給出任何錯誤,並且不會調用FileReader(),Firefox會給出一個奇怪的錯誤。 FileReader()在Blob類型上工作正常。有任何想法嗎?請參見下面的測試代碼:File API FileReader()readAsText函數不適用於「文件」類型
<head>
<script language="JavaScript" type="text/javascript">
var ContentString='(empty)';
var reader = new FileReader();
var testBLOB = new Blob(['Test Blob'], { "type" : "text/plain" });
reader.onload = function(event) {ContentString = event.target.result;};
reader.onerror = function(event) {alert('Load error!');};
function WriteContents(Iteration,FileOrBlob)
{
if (Iteration==0)
{
if (FileOrBlob==0)
{
try
{
var fileUpload=document.getElementById("inputFile");
//alert(fileUpload.type);
reader.readAsText(fileUpload/*, "UTF-8"*/);
}
catch(err) {alert(err.message);}
}
else
{
reader.readAsText(testBLOB/*, "UTF-8"*/);
}
}
document.getElementById("Iteration").innerHTML=Iteration;
document.getElementById("ContentString").innerHTML=ContentString;
document.getElementById("error").innerHTML=reader.error;
document.getElementById("readyState").innerHTML=reader.readyState;
document.getElementById("result").innerHTML=reader.result;
setTimeout('WriteContents('+(Iteration+1)+','+FileOrBlob+');',5000);
}
if (window.File && window.FileReader && window.FileList && window.Blob) {document.write('OK<br>');} else {document.write('Browser Error<br>');}
</script>
</head>
<br>
<input type="file" id="inputFile" name="inputFile" onchange="WriteContents(0,0);">
<input type="button" onclick="WriteContents(0,1);" value="Use Test Blob">
<br><br>
<table border=1>
<tr><td>Iteration</td><td id="Iteration">Choose File or Blob Above (one time only please!)</td></tr>
<tr><td>ContentString</td><td id="ContentString"></td></tr>
<tr><td>error</td><td id="error"></td></tr>
<tr><td>readyState</td><td id="readyState"></td></tr>
<tr><td>result</td><td id="result"></td></tr>
「open chrome with the flag --allow-file-access-from-files」回答的類似問題不適用於... – CraigDub