I'm developing an wireless file transfer app (HTTP Web Server), it contains a website with a form to upload file to the server i.e android app
When I select a file of very less size header generated is as below.
POST /?Upload HTTP/1.1
Host: 192.168.0.101:4567
Connection: keep-alive
Content-Length: 2968
Pragma: no-cache
Cache-Control: no-cache
Origin: http://192.168.0.101:4567
User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2623.87 Safari/537.36
Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryT0t2jgS72DnsVZRX
Accept: */*
DNT: 1
Referer: http://192.168.0.101:4567/
Accept-Encoding: gzip, deflate
Accept-Language: en-US,en;q=0.8
And when I select a larger file then and error occurs as follow
Console error : (index):637 Refused to set unsafe header "Content-length"
Header generated
Provisional headers are shown
Content-Type:multipart/form-data; boundary=----WebKitFormBoundary0tFAb8kt90pwbuFO
Origin:http://192.168.0.101:4567
Referer:http://192.168.0.101:4567/
User-Agent:Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2623.87 Safari/537.36
Provisional headers are shown
Content-Type:multipart/form-data; boundary=----WebKitFormBoundary0tFAb8kt90pwbuFO
Origin:http://192.168.0.101:4567
Referer:http://192.168.0.101:4567/
User-Agent:Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2623.87 Safari/537.36
Provisional headers are shown
Content-Type:multipart/form-data; boundary=----WebKitFormBoundary0tFAb8kt90pwbuFO
Origin:http://192.168.0.101:4567
Referer:http://192.168.0.101:4567/
User-Agent:Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2623.87 Safari/537.36
Code :
<form id="uploadForm" method="post" enctype="multipart/form-data">
<input id="uploadPath" type="hidden" name="path">
<button class="file-upload">
<input id="fileUpload" onchange="uploadFile()" type="file" class="file-input">Upload
</button>
</form>
<script>
function uploadFile() {
var form = document.getElementById('uploadForm');
var path = form.elements.namedItem("path").value
var file = document.getElementById('fileUpload').files[0];
var formData = new FormData(form);
formData.append('file', file);
var http = new XMLHttpRequest();
http.open("POST", '/?Upload', true);
http.setRequestHeader("Content-length", file.size);
http.onreadystatechange = function () { //Call a function when the state changes.
if (http.readyState == 4 && http.status == 200) {
alert(http.responseText);
}
}
http.send(formData);
form.reset();
form.elements.namedItem("path").value = path;
}
</script>