Datei-Upload mit HTTPHandler

Question

Nov 16, 2015, 10:33 AM

httphandler file-upload multipartform-data java

Datei-Upload mit HTTPHandler

Ich versuche, eine Datei hochzuladen mehrteilige Formulardaten) mit HTTPHandler.

WebKit Boundary wird in die Zieldatei geschrieben, wodurch die Datei beschädigt wird.

Input-Dateien können alle Arten von Dateien sein, einschließlich Text, Zip, Apk usw.

Code

    public void handle(HttpExchange httpExchange) throws IOException {

    URI uri = httpExchange.getRequestURI();
    String httpReqMethod = httpExchange.getRequestMethod();
    Headers headers = httpExchange.getRequestHeaders();
    InputStream  inputStrm = null;
    FileOutputStream destFile = null;
    String contentType = ((headers.get("Content-type") != null) ? (headers.get("Content-type").toString()) : (null));
    httpExchange.getRequestURI().getQuery());

    Map<String, String> queryParams = queryToMap(httpExchange.getRequestURI().getQuery());
    Set<String> keys= headers.keySet();
    Iterator<String> itr = keys.iterator();
    while(itr.hasNext())
    {
      String key = (String)itr.next();
    }

    File file = new File(ACEConstants.WEB_SERVER_CTX_ROOT + uri.getPath()).getCanonicalFile();
    String resource = uri.getPath().substring(
              uri.getPath().indexOf(ACEConstants.WEB_SERVER_CTX_ROOT)+ACEConstants.WEB_SERVER_CTX_ROOT.length()+1);

      if(httpReqMethod.equals(ACEConstants.HTTP_REQUEST_METHOD_POST) )
      {
        if(contentType != null && contentType.contains("multipart/form-data"))
        {
          if(resource.equals("fileUpload"))
          {
            inputStrm = httpExchange.getRequestBody();
            destFile = new FileOutputStream(new File("D:\\"+queryParams.get("fileName")));
            String contentLength = headers.get("Content-length").toString();
            long fileSize = (Long.parseLong(contentLength.substring(1, contentLength.length()-1)));
            int iteration = 1;
            long bytesToBeRead = (fileSize > 1024) ? ((iteration * 1024)) : (inputStrm.available());
            long bytesRemaining = (fileSize) - (iteration * 1024);
              byte[] bytes = new byte[1024];

            if(fileSize <= 1024) 
            {
              bytes = new byte[inputStrm.available()];
              inputStrm.read(bytes);
              destFile.write(bytes);
            }
            else {

              while (inputStrm.read(bytes) != -1) {
                iteration++;
                destFile.write(bytes);
                bytesRemaining =  ( fileSize - ((iteration-1) * 1024));
                if (bytesRemaining >= 1024) {
                  bytesToBeRead = 1024;
                  bytes = new byte[1024];
                }
                else {
                  bytes = new byte[inputStrm.available()];

                  inputStrm.read(bytes);
                  destFile.write(bytes);
                  break;
                }
              }
            }
            destFile.close();
          }
        } 
      }
    }

Hier ist der HTML-Code

<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title></title>
    <script type="text/javascript">

        function processForm(frm)
        {
            var fu1 = document.getElementsByName("datafile");
            var filename = fu1[0].value;
            filename = filename.substring(filename.lastIndexOf("\\")+1);
            alert("You selected " + filename);
            frm.action = "http://localhost:64444/ACE/fileUpload?fileName="+filename;
            return true;
        }

    </script>
</head>
<body>

<form name="myForm" enctype="multipart/form-data" method="post" acceptcharset="UTF-8" onsubmit="processForm(this);">
    <p>
        Please specify a file, or a set of files:<br>
        <input type="file" name="datafile" size="40">
    </p>
    <div>
        <input type="submit" value="Send">
    </div>
</form>

</body>
</html>

Was läuft hier falsch? Hilfe wäre sehr dankbar.

EDIT 1:

Wenn die Eingabedatei eine Textdatei mit folgendem Inhalt ist: 1234567890
Die Ausgabedatei hat den Inhalt :

 ------WebKitFormBoundaryKBRUiUWrIpW9wq2j
Content-Disposition: form-data; name="textline"


------WebKitFormBoundaryKBRUiUWrIpW9wq2j
Content-Disposition: form-data; name="datafile"; filename="test.txt"
Content-Type: text/plain

1234567890
------WebKitFormBoundaryKBRUiUWrIpW9wq2j--