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The request doesn’t contain a multipart/form-data or multipart/mixed stream, content type header is null


org.apache.commons.fileupload.FileUploadBase$InvalidContentTypeException: the request doesn’t contain a multipart/form-data or multipart/mixed stream, content type header is null

If you are iterating the items from the multipart request without checking if an http request is encoded in multipart format
then you will get this error.

If ServletFileUpload.isMultipartContent(request) returns true then you need to get the fields via the upload.parseRequest(request) method.

eg:

// Check that we have a file upload request
boolean isMultipart = ServletFileUpload.isMultipartContent(request);
if(isMultipart)
{
// Create a factory for disk-based file items
DiskFileItemFactory factory = new DiskFileItemFactory();

// Set factory constraints
factory.setSizeThreshold(1000000);
factory.setRepository( ConfigServlet.getTempDirectory() );

// Create a new file upload handler
ServletFileUpload upload = new ServletFileUpload(factory);

// Set overall request size constraint
upload.setSizeMax(10000000);

// Parse the request
List items;
try {
items = upload.parseRequest(request);

for(FileItem item : items)
{

if (item.isFormField()) {
String name = item.getFieldName();
String value = item.getString();
query.put(name, value);

}
else // file object
{
// do stuff for file request

}

}
} catch (FileUploadException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
else
{
query = new TreeMap();
Map tbl = request.getParameterMap();
query.putAll( tbl );
}

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One Responses


Multipart mixed | Albfarweststorage September 25, 2009 at 9:59 am

[…] The request doesn’t contain a multipart/form-data or multipart/mixed5.1. Multipart Media Type … Four subtypes are initially defined, including the basic "mixed" subtype specifying a generic mixed set of parts, "alternative" for representing the same data in multiple formats, "parallel" for parts intended to be viewed simultaneously, and "digest" for multipart entities in which each part has… […]


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