问题描述
我知道有很多类似的问题,但我还是没有找到我的问题的解决方案。我想上传与XMLHtt prequest的文件,所以我开发了下面的code:
I know there are a lot of similar questions, but I still haven't found a solution for my problem.I'm trying to upload a file with XMLHttpRequest, so I developed the code below:
var sendFiles = function(url,onload,onerror,file,headers){
var xhr = XMLHttpRequest ? new XMLHttpRequest() : new ActiveXObject('Microsoft.XMLHttp'),
upload = xhr.upload;
API.addEvent(xhr,'readystatechange',function(){
if(xhr.readyState==4)
if((xhr.status>=200 && xhr.status<300) || xhr.status==304){
this.response = this.response || this.responseText;
onload.call(xhr);
}else onerror.call(xhr);
});
xhr.open('POST',url,true);
for(var n=0;n<headers.length;n++)
xhr.setRequestHeader(headers[n]);
xhr.send(file);
return xhr;
};
和PHP的端脚本是:
<?php
header('Content-type: text/html;charset=ISO-8859-1');
$status = 0;
if(@copy($_FILES['file']['tmp_name'],'test\\' . $_FILES['file']['name']))
$status = 1;
else
$err = '0';
echo '{
"status": ' . $status . '
}';
?>;
但变种$ _FILES ['文件']似乎是空的,这意味着该文件不被发送到服务器。然后,我决定使用FORMDATA对象,在code以下
But the var $_FILES['file'] seems to be empty, which means that the file isn't being sent to the server.Then i decided to use the FormData Object, in the code below
var sendFiles = function(url,onload,onerror,file,headers){
var xhr = XMLHttpRequest ? new XMLHttpRequest() : new ActiveXObject('Microsoft.XMLHttp'),
upload = xhr.upload,
formData = new FormData();
formData.append('file',file);
API.addEvent(xhr,'readystatechange',function(){
if(xhr.readyState==4)
if((xhr.status>=200 && xhr.status<300) || xhr.status==304){
this.response = this.response || this.responseText;
onload.call(xhr);
}else onerror.call(xhr);
});
xhr.open('POST',url,true);
for(var n=0;n<headers.length;n++)
xhr.setRequestHeader(headers[n]);
xhr.send(formData);
return xhr;
};
和它的工作,但只有文件大小从低到大约8MB。当我尝试发送,有超过大小8MB的文件,该变种 $ _ FILES ['文件']
变空一次
注意:在文件变种相当于类似document.getElementsById('的FileInput)的文件[0];
And it worked, but only with file sizes low to about 8mb. When I try sending a file that has more than 8mb of size, the var $_FILES['file']
becomes empty again
NOTE: the 'file' var corresponds to something like document.getElementsById('fileInput').files[0];
推荐答案
要避免post_max_size的限制问题......但也出现内存不足的问题,双方:
To avoid the post_max_size limitation problem... but also out of memory problems on both sides :
-
使用PUT POST代替:
use PUT instead of POST :
xhr.open(放,upload.php的,真正的);
添加自定义页眉指定原始文件名和文件大小:
add custom headers to specify original FileName and FileSize :
xhr.setRequestHeader(X文件名,file.name);
xhr.setRequestHeader(X-文件大小,file.size);
直接在XHR发送方法使用File对象:
use the File object directly in your XHR send method :
xhr.send(文件);
请注意,File对象可以直接通过文件您输入的特性[type = file] DOM对象的
-
通过$ _ SERVER阅读自定义页眉:
read the custom headers via $_SERVER :
$文件名= $ _ SERVER ['HTTP_X_FILE_NAME'];
$文件大小= $ _ SERVER ['HTTP_X_FILE_SIZE'];
使用PHP读取文件中的数据://输入:
read file data using php://input :
$ =中的fopen('php的://输入','R');
您会然后可以发送非常大的文件(1GB或以上),没有任何限制!
You'll then be able to send very big files (1GB or more) without any limitation!!!
这code适用于火狐4+,Chrome浏览器6+,IE10 + 的
这篇关于AJAX文件上传与XMLHtt prequest的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!