HTTP - SwitchYard

The HTTP component in SwitchYard provides HTTP-based binding support for services and references in SwitchYard.

Binding Services with HTTP

Composite-level services can be exposed as a HTTP-based service using the <binding.http> binding definition. The following configuration options are available for binding.rest when binding services:

operationSelector : specification of the operation to use for the message exchange. See Operation Selector for more details.
contextPath : A context path for the HTTP endpoint.

Here's an example of what a HTTP service binding looks like:

<sca:service name="QuoteService" promote="StockService/QuoteService">
    <http:binding.http>
        <selector:operationSelector operationName="getPrice"/>
        <http:contextPath>http-binding/quote</http:contextPath>
    </http:binding.http>
</sca:service>

Binding References with HTTP

Binding a reference with HTTP can be used to make HTTP-based services available to SwitchYard services. The following configuration options are available for binding.http when binding references:

address : A URL that points to the HTTP endpoint. It is optional and if not specified will default to http://127.0.0.1:8080/.
method : The HTTP method used for invoking the endpoint. Default is GET.
timeout : The request's time-out value in milliseconds.
contentType : The HTTP Content-Type header that needs to be set on the request.
proxy : HTTP Proxy settings for the endpoint.
basic/ntlm : authentication configuration for the endpoint.

Here's an example of what a HTTP reference binding looks like:

<sca:reference name="Symbol" promote="StockService/SymbolService" multiplicity="1..1">
    <http:binding.http>
        <http:address>http://localhost:8080/http-binding/symbol</http:address>
        <http:method>POST</http:method>
        <http:contentType>text/plain</http:contentType>
    </http:binding.http>
</sca:reference>

Proxy Configuration

If the HTTP reference needs to pass through a proxy server then the proxy server configuration can be provided using the proxy element. The following configuration options are available:

host : The proxy host.
port : The proxy port (optional).
user : The proxy user (optional).
password : The proxy password (optional).

<sca:reference name="Symbol" promote="StockService/SymbolService" multiplicity="1..1">
    <http:binding.http>
        <http:address>http://localhost:8080/http-binding/symbol</http:address>
        <http:proxy>
            <http:host>host</http:host>
            <http:port>8090</http:port>
            <http:user>Beal</http:user>
            <http:password>conjecture</http:password>
        </http:proxy>
    </http:binding.http>
</sca:reference>

Authentication Configuration

If the HTTP reference endpoint is secured using BASIC/NTLM, then the authentication configuration can be provided using the basic or ntlm elements. The following configuration options are available:

user : The authentication user.
password : The authentication password.
realm/domain : The authentication realm or the Windows domain.

A sample BASIC authentication configuration:

<sca:reference name="Symbol" promote="StockService/SymbolService" multiplicity="1..1">
    <http:binding.http>
        <http:address>http://localhost:8080/http-binding/symbol</http:address>
        <http:basic>
            <http:user>Beal</http:user>
            <http:password>conjecture</http:password>
            <http:realm>Any</http:realm>
        </http:basic>
    </http:binding.http>
</sca:reference>