I want to write Java application that will upload a file to the Apache server with PHP. The Java code uses Jakarta HttpClient library version 4.0 beta2:

    import java.io.File;
    import org.apache.http.HttpEntity;
    import org.apache.http.HttpResponse;
    import org.apache.http.HttpVersion;
    import org.apache.http.client.HttpClient;
    import org.apache.http.client.methods.HttpPost;
    import org.apache.http.entity.FileEntity;
    import org.apache.http.impl.client.DefaultHttpClient;
    import org.apache.http.params.CoreProtocolPNames;
    import org.apache.http.util.EntityUtils;
    
    
    public class PostFile {
      public static void main(String[] args) throws Exception {
        HttpClient httpclient = new DefaultHttpClient();
        httpclient.getParams().setParameter(CoreProtocolPNames.PROTOCOL_VERSION, HttpVersion.HTTP_1_1);
    
        HttpPost httppost = new HttpPost(&quot;http://localhost:9002/upload.php&quot;);
        File file = new File(&quot;c:/TRASH/zaba_1.jpg&quot;);
    
        FileEntity reqEntity = new FileEntity(file, &quot;binary/octet-stream&quot;);
        
        httppost.setEntity(reqEntity);
        reqEntity.setContentType(&quot;binary/octet-stream&quot;);
        System.out.println(&quot;executing request &quot; + httppost.getRequestLine());
        HttpResponse response = httpclient.execute(httppost);
        HttpEntity resEntity = response.getEntity();
    
        System.out.println(response.getStatusLine());
        if (resEntity != null) {
          System.out.println(EntityUtils.toString(resEntity));
        }
        if (resEntity != null) {
          resEntity.consumeContent();
        }
    
        httpclient.getConnectionManager().shutdown();
      }
    }

The PHP file `upload.php` is very simple:

    &lt;?php
    if (is_uploaded_file($_FILES[&#39;userfile&#39;][&#39;tmp_name&#39;])) {
      echo &quot;File &quot;. $_FILES[&#39;userfile&#39;][&#39;name&#39;] .&quot; uploaded successfully.\n&quot;;
      move_uploaded_file ($_FILES[&#39;userfile&#39;] [&#39;tmp_name&#39;], $_FILES[&#39;userfile&#39;] [&#39;name&#39;]);
    } else {
      echo &quot;Possible file upload attack: &quot;;
      echo &quot;filename &#39;&quot;. $_FILES[&#39;userfile&#39;][&#39;tmp_name&#39;] . &quot;&#39;.&quot;;
      print_r($_FILES);
    }
    ?&gt;

Reading the response I get the following result:

    executing request POST http://localhost:9002/upload.php HTTP/1.1

&lt;pre&gt;
HTTP/1.1 200 OK
Possible file upload attack: filename &#39;&#39;.
Array
(
)
&lt;/pre&gt;
So the request was successful, I was able to communicate with server, however PHP didn&#39;t notice the file - the method `is_uploaded_file` returned `false` and `$_FILES` variable is empty. I have no idea why this might happend. I have tracked HTTP response and request and they look ok:&lt;br&gt;
request is:
&lt;pre&gt;
POST /upload.php HTTP/1.1
Content-Length: 13091
Content-Type: binary/octet-stream
Host: localhost:9002
Connection: Keep-Alive
User-Agent: Apache-HttpClient/4.0-beta2 (java 1.5)
Expect: 100-Continue

˙Ř˙ŕ..... the rest of the binary file...
&lt;/pre&gt;
and response:
&lt;pre&gt;
HTTP/1.1 100 Continue

HTTP/1.1 200 OK
Date: Wed, 01 Jul 2009 06:51:57 GMT
Server: Apache/2.2.8 (Win32) DAV/2 mod_ssl/2.2.8 OpenSSL/0.9.8g mod_autoindex_color PHP/5.2.5 mod_jk/1.2.26
X-Powered-By: PHP/5.2.5
Content-Length: 51
Keep-Alive: timeout=5, max=100
Connection: Keep-Alive
Content-Type: text/html

Possible file upload attack: filename &#39;&#39;.Array
(
)
&lt;/pre&gt;

I was testing this both on the local windows xp with xampp and remote Linux server. I have also tried to use previous version of HttpClient - version 3.1 - and the result was even more unclear, `is_uploaded_file` returned `false`, however `$_FILES` array was filled with proper data.



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How to upload a file using Java HttpClient library working with PHP