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Code Quality Rank: L3
Programming language: Java
License: Apache License 2.0
Tags: Miscellaneous    
Latest version: v4.7.3

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README

Membrane Service Proxy

GitHub release Hex.pm

Reverse HTTP proxy (framework) written in Java, that can be used

  • as an API gateway
  • as a security proxy
  • for HTTP based integration
  • as a WebSockets and STOMP router

Get Started

Download the binary.

Unpack.

Start service-proxy.sh or service-proxy.bat.

Have a look at the main configuration file conf/proxies.xml. Changes to this file are instantly deployed.

Run the samples in the examples folder, follow the REST or SOAP tutorials, see the Documentation or the FAQ.

Samples

REST

Routing requests from localhost:80 to localhost:8080 :

<serviceProxy port="80">
    <target host="localhost" port="8080" />
</serviceProxy>

Routing only requests with path /foo :

<serviceProxy port="80">
    <path>/foo</path>
    <target host="localhost" port="8080" />
</serviceProxy>

SOAP

SOAP proxies configure themselves by analysing WSDL:

<soapProxy wsdl="http://thomas-bayer.com/axis2/services/BLZService?wsdl">
</soapProxy>

Add features like logging or XML Schema validation against a WSDL document:

<soapProxy wsdl="http://thomas-bayer.com/axis2/services/BLZService?wsdl">
    <validator />
    <log />
</soapProxy>

Limit the number of requests in a given time frame:

<serviceProxy port="80">
    <rateLimiter requestLimit="3" requestLimitDuration="PT30S"/>
    <target host="localhost" port="8080" />
</serviceProxy>

Rewrite URLs:

<serviceProxy port="2000">
    <rewriter>
        <map from="^/goodlookingpath/(.*)" to="/backendpath/$1" />
    </rewriter>
    <target host="my.backend.server" port="80" />
</serviceProxy>

Monitor HTTP traffic:

<serviceProxy port="2000">
    <log/>
    <target host="localhost" port="8080" />
</serviceProxy>

Monitoring and manipulation

Dynamically manipulate and monitor messages with Groovy and JavaScript (Nashorn):

<serviceProxy port="2000">
    <groovy>
        exc.request.header.add("X-Groovy", "Hello from Groovy")
        CONTINUE
    </groovy>
    <target host="localhost" port="8080" />
</serviceProxy>

<serviceProxy port="2000">
    <javascript>
        exc.getRequest().getHeader().add("X-Javascript", "Hello from JavaScript");
        CONTINUE;
    </javascript>
    <target host="localhost" port="8080" />
</serviceProxy>

Route and intercept WebSocket traffic:

<serviceProxy port="2000">
        <webSocket url="http://my.websocket.server:1234">
            <wsLog/>
        </webSocket>
    <target port="8080" host="localhost"/>
</serviceProxy>

(Find an example on membrane-soa.org)

Security

Use the widely adopted OAuth2/OpenID Framework to secure endpoints:

<serviceProxy name="Resource Service" port="2001">
    <oauth2Resource>
        <membrane src="https://accounts.google.com" clientId="INSERT_CLIENT_ID" clientSecret="INSERT_CLIENT_SECRET" scope="email profile" subject="sub"/>
    </oauth2Resource>    
    <groovy>
        def oauth2 = exc.properties.oauth2
        exc.request.header.setValue('X-EMAIL',oauth2.userinfo.email)
        CONTINUE
    </groovy>
    <target host="thomas-bayer.com" port="80"/>
</serviceProxy>

(Find an example on membrane-soa.org)

Operate your own OAuth2/OpenID AuthorizationServer/Identity Provider:

<serviceProxy name="Authorization Server" port="2000">
    <oauth2authserver location="logindialog" issuer="http://localhost:2000" consentFile="consentFile.json">
        <staticUserDataProvider>
            <user username="john" password="password" email="[email protected]" />
        </staticUserDataProvider>
            <staticClientList>
        <client clientId="abc" clientSecret="def" callbackUrl="http://localhost:2001/oauth2callback" />
        </staticClientList>
        <bearerToken/>
        <claims value="aud email iss sub username">
            <scope id="username" claims="username"/>
            <scope id="profile" claims="username email password"/>
        </claims>
    </oauth2authserver>
</serviceProxy>

(Find an example on membrane-soa.org)

Secure an endpoint with basic authentication:

<serviceProxy port="2000">
    <basicAuthentication>
        <user name="bob" password="secret" />
    </basicAuthentication>
    <target host="localhost" port="8080" />
</serviceProxy>

Route to SSL/TLS secured endpoints:

<serviceProxy port="8080">
    <target host="www.predic8.de" port="443">
        <ssl/>
    </target>
</serviceProxy>

Secure endpoints with SSL/TLS:

<serviceProxy port="443">
    <ssl>
        <keystore location="membrane.jks" password="secret" keyPassword="secret" />
        <truststore location="membrane.jks" password="secret" />
    </ssl>
    <target host="localhost" port="8080"  />
</serviceProxy>

Limit the number of incoming requests:

<serviceProxy port="2000">
    <rateLimiter requestLimit="3" requestLimitDuration="PT30S"/>
    <target host="localhost" port="8080" />
</serviceProxy>

Clustering

Distribute your workload to multiple nodes:

<serviceProxy name="Balancer" port="8080">
    <balancer name="balancer">
        <clusters>
            <cluster name="Default">
                <node host="my.backend.service-1" port="4000"/>
                <node host="my.backend.service-2" port="4000"/>
                <node host="my.backend.service-3" port="4000"/>
            </cluster>
        </clusters>
    </balancer>
</serviceProxy>

See configuration reference for much more.


*Note that all licence references and agreements mentioned in the Membrane Service Proxy README section above are relevant to that project's source code only.