Content streams are bulk data passed with a request to Solr.
When Solr RequestHandlers are accessed using path based URLs, the SolrQueryRequest object containing the parameters of the request may also contain a list of ContentStreams containing bulk data for the request. (The name SolrQueryRequest is a bit misleading: it is involved in all requests, regardless of whether it is a query request or an update request.)
Content Stream Sources
Currently request handlers can get content streams in a variety of ways:
-
For multipart file uploads, each file is passed as a stream.
-
For POST requests where the content-type is not
application/x-www-form-urlencoded, the raw POST body is passed as a stream. The full POST body is parsed as parameters and included in the Solr parameters. -
The contents of parameter
stream.bodyis passed as a stream. -
If remote streaming is enabled and URL content is called for during request handling, the contents of each
stream.urlandstream.fileparameters are fetched and passed as a stream.
By default, curl sends a contentType="application/x-www-form-urlencoded" header. If you need to test a SolrContentHeader content stream, you will need to set the content type with curl’s -H flag.
RemoteStreaming
Remote streaming lets you send the contents of a URL as a stream to a given SolrRequestHandler. You could use remote streaming to send a remote or local file to an update plugin.
Remote streaming is disabled by default. Enabling it is not recommended in a production situation without additional security between you and untrusted remote clients.
*** WARNING ***
Before enabling remote streaming, you should make sure your
system has authentication enabled.
<requestParsers enableRemoteStreaming="false"...>When enableRemoteStreaming is not specified in solrconfig.xml, the default behavior is to not allow remote streaming (i.e., enableRemoteStreaming="false").
Remote streaming can also be enabled through the Config API as follows:
curl -d '
{
"set-property" : {"requestDispatcher.requestParsers.enableRemoteStreaming":true}
}
' http://localhost:8983/solr/techproducts/config -H 'Content-type:application/json'|
If |
Debugging Requests
The implicit "dump" RequestHandler (see Implicit RequestHandlers) simply outputs the contents of the SolrQueryRequest using the specified writer type wt. This is a useful tool to help understand what streams are available to the RequestHandlers.
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