Simulate post data sending using Java

Server:
1. jsp
<Body>
<Form name = "_ ctl0" method = "post" action = "TestFileManager. aspx" id = "_ ctl0" enctype = "multipart/form-data">
<Input type = "hidden" name = "_ VIEWSTATE" value = "dDwyNTIzNjA5NDU7Oz7rsE3eBYzQHDVtl + aTn96MvQW6PQ ="/>
<P>
<Input name = "uploadfile1" id = "uploadfile1" type = "file" size = "49"/>
<Input type = "submit" name = "Button1" value = "? "Id =" Button1 "/>
</P>
<P>
<Span id = "Label1" style = "width: 459px;"> </span>
</P>
<! -- Insert content here -->
</Form>
</Body>
Client:
First, create an http request to the server.
HttpRequest request = new HttpRequest ("http: // server/1.jsp ");
The first time I used the GET method
Request. setMethod ("GET ");
Then, set the request attributes.
Request. setRequestHeader ("cache-control", "No-Cache ");
Keep the connection here, because data will be sent to the server later.
Request. setRequestHeader ("connection", "keep-alive ");
The following are some irrelevant attribute settings.
Request. setRequestHeader ("accept", "image/GIF, image/X-xbitmap, image/JPEG, image/pjpeg, application/vnd. MS-Excel, application/vnd. MS-PowerPoint, application/MSWord ,*/*");
Request. setRequestHeader ("Accept-encoding", "gzip, deflate ");
Request. setRequestHeader ("Accept-language", "En-Au ");
Request. setRequestHeader ("Referer", "http: // server/1.jsp ");
Request. setRequestHeader ("User-Agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;. Net CLR 1.0.3215;. Net CLR 1.0.3705 )");
Construct the connection request and connect
Request. Connect ();
Then extract the cookie value, which can be used in post.
String strcookie = request. getResponseHeader ("Set-cookie ");
StrCookie = strCookie. substring (0, strCookie. indexOf (";"));
The following uses a loop query to extract the value of _ VIEWSTATE
For (int I = 0; I <nlist. getLength (); I ++ ){
Node = nlist. item (I );
StrName = getNodeAttributeValue (node, "name ");
If (strName. equals ("_ VIEWSTATE ")){
StrValue = getNodeAttributeValue (node, "value ");
Break;
}
}
Send data to server Organization
DataOutputStream dos = new DataOutputStream (request. getOutputStream ());
Dos. writeBytes ("-----------------------------" + strBoundary); // This is the interval between each data to be sent
Dos. writeBytes ("Content-Disposition: form-data; name =" _ VIEWSTATE "");
Dos. writeBytes ("" + strValue );
Dos. writeBytes ("-----------------------------" + strBoundary );
This is the part of the file to be sent.
Dos. writeBytes ("Content-Disposition: form-data; name =" uploadfile1 "; filename =" "+ strFileName + """);
Dos. writeBytes ("Content-Type: text/xml ");
Dos. writeBytes ("");
Dos. writeBytes (new String (data ));
Dos. writeBytes ("-----------------------------" + strBoundary );
Dos. writeBytes ("Content-Disposition: form-data; name =" Button1 "");
Dos. writeBytes ("Upload ");
Dos. writeBytes ("-----------------------------" + strBoundary + "--");
Dos. writeBytes ("");
Dos. close ();