getFileSize(file) {
file = decodeURI(file)
return new Promise((resolve) =>{
if (!file) {
resolve(0)
return
}
const filePath = path.resolve(__dirname, "../public", file)
fs.stat(filePath, (err, data) =>{
if (err == null) {
resolve(data.size)
return
}
resolve(0)
})
})
},
获取上传文件的大小：<input type="file" name="fileId" id="fileId" class="height30 width-245">
function findSize(field_id){
var byteSize = 0
if (!+[1,] &&!$("#"+field_id).files) {
var filePath = $("#"+field_id).val()
var fileSystem = new ActiveXObject("Scripting.FileSystemObject")
byteSize = fileSystem.GetFile(filePath).size
} else{
var fileInput = $("#"+field_id)[0]
byteSize = fileInput.files[0].size
}
return ( Math.ceil(byteSize / 1024) )
}
// 如何通过javascript获得本地文件大小的<HTML>
<HEAD>
<SCRIPT>
function getFileSize (fileName) {
window.oldOnError = window.onerror
window.onerror = function (err) {
if (err.indexOf('utomation') != -1) {
alert('file access not possible')
return true }
else return false }
var fso = new ActiveXObject('Scripting.FileSystemObject') var file = fso.GetFile(fileName) window.onerror = window.oldOnError return file.Size }function showImageDimensions () { alert(this.width + 'x' + this.height)}</SCRIPT>
</HEAD>
<BODY><
FORM NAME="formName">
<INPUT TYPE="file" NAME="fileName"><BR><INPUT TYPE="button" VALUE="检查文件大小" ONCLICK="alert(getFileSize(this.form.fileName.value))">
</FORM>
</BODY>
</HTML>
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