Re: restlet component GET request and query string parameters

[William Tam]

I think if your route is below, the query "locale=cs_CZ" will be added 
to the actual GET request's query string (but not the "reserved" 
queries/options as documented in the wiki such as CamelHttpMethod).

from("direct:test").to("restlet:http://localhost:8089?locale=cs_CZ&CamelHttpMethod=GET";)
I think if you set custom headers in Camel IN header, they will added to 
the request or the form.  I *thought* the they get sent as HTTP headers.

Below snippet from 
DefaultRestletBinding.populateRestletRequestFromExchange() that performs 
the propagation of Camel IN headers to Restlet request.


        for (Map.Entry<String, Object> entry : 
exchange.getIn().getHeaders().entrySet()) {
            if 
(!headerFilterStrategy.applyFilterToCamelHeaders(entry.getKey(), 
entry.getValue(), exchange)) {
                // Use forms only for GET and POST/x-www-form-urlencoded
                if (request.getMethod() == Method.GET || 
(request.getMethod() == Method.POST && mediaType == 
MediaType.APPLICATION_WWW_FORM)) {
                    if (entry.getKey().startsWith("org.restlet.")) {
                        // put the org.restlet headers in attributes
                        request.getAttributes().put(entry.getKey(), 
entry.getValue());
                    } else {
                        // put the user stuff in the form
                        form.add(entry.getKey(), 
entry.getValue().toString());
                    }
                } else {
                    // For non-form post put all the headers in attributes
                    request.getAttributes().put(entry.getKey(), 
entry.getValue());
                }
                if (LOG.isDebugEnabled()) {
                    LOG.debug("Populate Restlet request from exchange 
header: "
                            + entry.getKey() + " value: " + 
entry.getValue());
                }
            }
        }

On 03/18/2011 10:18 AM, mat127 wrote:
Hello,

I am using the camel-restlet component to build a REST client calling some
3rd party application RESTful API that is not built upon Camel.

In some cases I need to provide parameters to GET requests like e.g. item id
etc. According to the documentation and the source code I understood that
the restlet component pushes all header fields into the restlet.org request
(using the DefaultRestletBinding class). But I am unable to produce the
desired request this way at all.

Let me explain on following example:

        &lt;camel:route&gt;
             &lt;camel:from uri="direct:test"/&gt;
             &lt;camel:setHeader headerName="locale"&gt;
        &lt;camel:constant&gt;cs_CZ&lt;/camel:constant&gt;
             &lt;/camel:setHeader&gt;
             &lt;camel:to uri="restlet:http://localhost:8089/"/&gt;
             ...
        &lt;/camel:route&gt;

Calling this route using following Scala code:

            producer.requestBodyAndHeader(
                "direct:test", "",
                "itemId", id.id,
                classOf[java.util.Map[String,Object]]
            )

will produce following HTTP request on the localhost:

[pema@dev ~]$ nc -l 8089
GET http://dev:8089/ HTTP/1.1
Host: dev:8089
User-Agent: Noelios-Restlet-Engine/1.1.10
Referer: camel-restlet
Accept: */*
Connection: close

The problem is that the 'locale' and the 'id' parameters are missing there.
How can I get them into the GET request query string? Any hints are welcome!

Regards, Petr

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