[英]AWS S3: MaxPostPreDataLengthExceeded Your POST request fields preceeding the upload file was too large
[英]Stop file upload when filesize too large - jQuery S3
请查看下面的片段。 我正在使用 jQuery fileUpload 和直接 s3 表单将视频上传到 AWS。 我希望在视频到达任何本地服务器之前施加 5mb 的文件大小限制。 如何修改此代码,以便完全停止上传并在文件大小超过 5mb 时提醒用户,如果小于,一切照常进行?
我在 S3 表单选项中添加了 5mb 的内容长度限制,因此拒绝上传大于此值的内容,但是如果有什么东西可以通知用户上传太大而无法开始,那将是可取的。
$ ->
$(".direct-upload").each ->
form = $(this)
$(this).fileupload
url: form.attr("action")
type: "POST"
autoUpload: true
dataType: "xml"
add: (event, data) ->
if data.files[0].size < 5242880
$.ajax
url: "/signed_urls"
type: "GET"
dataType: "json"
data:
doc:
title: data.files[0].name
async: false
success: (data) ->
form.find("input[name=key]").val data.key
form.find("input[name=policy]").val data.policy
form.find("input[name=signature]").val data.signature
data.submit()
send: (e, data) ->
$(".progress, #dropzone").fadeIn()
$.each data.files, (index, file) ->
$('.well').html("").append("Uploading: " + file.name + '<br>' + "File size: " + (file.size / 1000000 ) + ' MB')
progress: (e, data) ->
percent = undefined
percent = Math.round((e.loaded / e.total) * 100)
$(".bar").css "width", percent + "%"
fail: (e, data) ->
console.log "fail"
success: (data) ->
url = undefined
url = decodeURIComponent($(data).find("Location").text())
$("#video_file").val url
done: (event, data) ->
$("#new_video").submit()
$(".progress").fadeOut 1200, ->
$(".bar").css "width", 0
更新:
这很好用。 在 /signed_url 之前移动 if 语句可防止将太大的文件发送到服务器并提醒用户。
$ ->
$(".direct-upload").each (data) ->
form = $(this)
$(this).fileupload
url: form.attr("action")
type: "POST"
autoUpload: true
dataType: "xml"
add: (event, data) ->
if data.files[0].size < 5242880
$.ajax
url: "/signed_urls"
type: "GET"
dataType: "json"
data:
doc:
title: data.files[0].name
async: false
success: (data) ->
form.find("input[name=key]").val data.key
form.find("input[name=policy]").val data.policy
form.find("input[name=signature]").val data.signature
data.submit()
else
alert("File too big")
send: (e, data) ->
$(".progress, #dropzone").fadeIn()
$.each data.files, (index, file) ->
$('.well').html("").append("Uploading: " + file.name + '<br>' + "File size: " + (Math.round(file.size / 1000000 )) + ' MB')
progress: (e, data) ->
percent = undefined
percent = Math.round((e.loaded / e.total) * 100)
$(".bar").css "width", percent + "%"
fail: (e, data) ->
console.log "fail"
success: (data) ->
url = undefined
url = decodeURIComponent($(data).find("Location").text())
$("#video_file").val url
done: (event, data) ->
$("#new_video").submit()
$(".progress").fadeOut 1200, ->
$(".bar").css "width", 0
<form method="post" action="./step2.php" enctype="multipart/form-data" id="formID" name="formID">
<input type="text" name="title" id="title" />
<input type="file" name="pptfile" id="pptfile"/>
<input type="submit" name="btn" id="btn" />
<script type="text/javascript">
function checkUpload(size)
{
if(size>25)
{
var n = size.toFixed(2);
alert('Your file size is: ' + n + "MB, and it is too large to upload! Please try to upload smaller file (25MB or less).");
document.getElementById("btn").style.display='none';
}
else
{
//alert('File size is OK');
$('#tbn').show();
}
}
$('#pptfile').bind('change', function() {
var fileSize = this.files[0].size/1024/1024;
checkUpload(fileSize);
});
</script>
</form>
这与我的做法几乎完全相同。 如果你不提交它,它不会发送文件。
当文件太大时,您是否想将请求的 ajax 提交到/signed_urls
? 也许您应该将所有这些都移到if data.files[0].size < 5242880
块中?
为我工作:
checkFileSize(event) {
f = document.getElementById('id_ifile');
if (f.files.length > 0 && f.files[0].size > 3 * 1024 ** 2) {
alert( 'The file is too large (no more than 3MB)' );
event.preventDefault();
}
}
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