本文介绍了通过xmlhtt prequest上传文件生成的多部分:下一页部分:EOF的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我想通过上传XMLHtt prequest文件,目前我使用golang
当我使用curl测试上传一切顺利,该文件被上传到亚马逊的S3存储,但使用Javascript,当我收到以下错误:多部分:下一页部分:EOF
这是JS的一部分:
的document.getElementById(附件)。的addEventListener(变,功能(五){
var文件= this.files [0];
VAR XHR =新XMLHtt prequest();
VAR FORMDATA =新FORMDATA();
formdata.append(附件,文件);
。边界=的Math.random()的toString()SUBSTR(2);
xhr.onreadystatechange =功能(E){
如果(4 == this.readyState){
的console.log([XHR上传完成,E]);
}
};
xhr.open(POST,https://开头upload_host:8443 /上载,真正的);
xhr.setRequestHeader(内容类型,多部分/格式数据;字符集= UTF-8;边界= ------------------------- - +边界+;);
xhr.send(FORMDATA);
}, 假);
有关在旅途中处理程序:
FUNC upload_handler(W http.ResponseWriter,R * http.Request,男render.Render){
w.Header()设置(访问控制 - 允许 - 起源,*)
文件头,错误:= r.FormFile(C.Storage.FieldName)
如果犯错!=零{
//错误时,抛出HERE
ServeHTTP(400,err.Error(),米)
返回
}
内容错误:= ioutil.ReadAll(文件)
如果犯错!=零{
ServeHTTP(400,err.Error(),米)
返回
}
作品尺寸,ERR:= file.Seek(0,2)// 2 =从端
如果犯错!=零{
ServeHTTP(400,err.Error(),米)
返回
}
如果文件大小> Int64的(C.Storage.FileSize){
ServeHTTP(400,文件大小超过限制,M)
返回
}
FTYPE:= http.DetectContentType(内容)
如果!strings.Contains(C.Storage.AllowedMimes,FTYPE){
ServeHTTP(400,文件类型不允许的,M)
返回
}
//功能上传到Amazon S3
file.Close()
}
解决方案
有关上传你可以使用PlUploader $ C $℃实施例的(即还用于大文件上传)。
I'm trying to upload a file via XMLHttpRequest, currently i'm using golang
When I use CURL to test the upload everything goes fine, and the file is uploaded to Amazon S3 bucket, but when using Javascript I get the following error : multipart: NextPart: EOF
this is the JS part :
document.getElementById("attachment").addEventListener("change", function(e) {
var file = this.files[0];
var xhr = new XMLHttpRequest();
var formdata = new FormData();
formdata.append("attachment", file);
boundary=Math.random().toString().substr(2);
xhr.onreadystatechange = function(e) {
if ( 4 == this.readyState ) {
console.log(["xhr upload complete", e]);
}
};
xhr.open("POST", "https://upload_host:8443/upload", true);
xhr.setRequestHeader("Content-Type","multipart/form-data; charset=utf-8; boundary=---------------------------"+boundary+";");
xhr.send(formdata);
}, false);
For the go handler :
func upload_handler(w http.ResponseWriter, r *http.Request, m render.Render) {
w.Header().Set("Access-Control-Allow-Origin", "*")
file, header, err := r.FormFile("C.Storage.FieldName")
if err != nil {
// ERROR THROWN HERE
ServeHTTP(400, err.Error(), m)
return
}
content, err := ioutil.ReadAll(file)
if err != nil {
ServeHTTP(400, err.Error(), m)
return
}
fileSize, err := file.Seek(0, 2) //2 = from end
if err != nil {
ServeHTTP(400, err.Error(), m)
return
}
if fileSize > int64(C.Storage.FileSize) {
ServeHTTP(400, "File size limit exceeded", m)
return
}
ftype := http.DetectContentType(content)
if !strings.Contains(C.Storage.AllowedMimes, ftype) {
ServeHTTP(400, "File type not allowed", m)
return
}
//FUNCTION TO UPLOAD TO AMAZON S3
file.Close()
}
解决方案
For uploading you can use PlUploader Code example (that is also used for large file uploading).
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