HTML form cannot post file content - html

Question

I'd like to post file to server by html form below:
<form action="http://localhost:8000/upload/file=1.txt" enctype="multipart/form-data" method="post">
<input type="file">
<input type="submit" value="Send">
</form>
And the HTTP header is below after click button "Send":
Response Headers
HTTP/1.0 200 OK
Date: Tue, 11 Aug 2015 08:35:28 GMT
Server: WSGIServer/0.2 CPython/3.4.3
X-Frame-Options: SAMEORIGIN
Content-Type: text/html; charset=utf-8
Request Headers
POST /upload/file=1.txt HTTP/1.1
Host: localhost:8000
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:39.0)
Gecko/20100101 Firefox/39.0
Accept:
text/html,application/xhtml+xml,application/xml;q=0.9,/;q=0.8
Accept-Language: de
Accept-Encoding: gzip, deflate
Referer: http://localhost:8083/
Connection: keep-alive
Request Headers From Upload Stream
Content-Length 48
Content-Type multipart/form-data;
boundary=---------------------------121841334829646
But it seems the file content can never be posted. Only the "-----------------------------121841334829646--" be posted to server. How can the file content be posted to server by html form?
Thanks!

Answer 1

Form controls can only be successful if they have a name.
<input type="file">
should be
<input type="file" name="my-file">