What is aXMLRPC?

aXMLRPC is a Java library with a leightweight XML-RPC client. XML-RPC is a specification for making remote procedure calls over the HTTP protocol in an XML format. The specificationc can be found under http://www.xmlrpc.com/spec.

The library was developed for the use with Android. Since it has no dependencies to any Android library or any other 3rd-party library, it is fully functional in any common java virtual machine (not only on Android).

You can control the client with some flags to extend its functionality. See the section about flags.

How to include it?

How to include the aXMLRPC client into your project? There are several ways to do that:

Include the source code

You can just include all the source code from the

src

Compile it as library

aXMLRPC uses maven, so you can build it using

mvn install

Use Maven

To use it on your Maven project, add it as a dependency on your pom.xml file:

    fr.turri
    aXMLRPC
    X.Y.Z

where X.Y.Z is the current aXMLRPC version

How to use the library?

You can use the library by initiating an

XMLRPCClient

try {
    XMLRPCClient client = new XMLRPCClient(new URL("http://example.com/xmlrpc"));

Boolean b = (Boolean)client.call("isServerOk");
Integer i = (Integer)client.call("add", 5, 10);
} catch(XMLRPCServerException ex) {
    // The server throw an error.
} catch(XMLRPCException ex) {
    // An error occured in the client.
} catch(Exception ex) {
    // Any other exception
}

Instead of passing the parameters as seperated values, you can also pack them in an array and pass the array to the method, like in the following example:

// ... The try-catch has been ommited for clarity.
XMLRPCClient client = new XMLRPCClient(url, "MyUserAgentString");
client.call("someMethod", new Object[]{ o1, o2, o3 });
// ...

Asynchronous Calls

The above method calls are synchronous. So the method

call

callAsync

XMLRPCCallback listener = new XMLRPCCallback() {
    public void onResponse(long id, Object result) {
        // Handling the servers response
    }
    public void onError(long id, XMLRPCException error) {
        // Handling any error in the library
    }
    public void onServerError(long id, XMLRPCServerException error) {
        // Handling an error response from the server
    }
};

XMLRPCClient client = new XMLRPCClient(url);
long id = client.callAsync(listener, "add", 5, 10);

You will be also able to cancel an asynchonous call. Just use the

cancel

XMLRPCClient

XMLRPCClient client = new XMLRPCClient(url);
long id = client.callAsync(listener, "method", params);
// ...
client.cancel(id);

The data types

The specification give some data tags for the server response. If you want to work on the type you must cast the returning

Object

call

i4

int

Integer

boolean

Boolean

string

String

double

Double

dateTime.iso8601

Date

base64

byte[]

Byte[]

array

Object[]

struct

Map

i8

Long

Flags

The client takes as second parameter (or third if an user agent is given) a combination of multiple flags. It could work like the following example:

// ...
XMLRPCClient client = new XMLRPCClient(url, 
    XMLRPCClient.FLAGS_STRICT | XMLRPCClient.FLAGS_8BYTE_INT);
// ...

The following flags are implemented:

FLAGS_STRICT

The client should parse responses strict to specification. It will check if the given content-type is right. The method name in a call must only contain of A-Z, a-z, 0-9, _, ., :, / Normally this is not needed.

FLAGS8BYTEINT

The client will be able to handle 8 byte integer values (longs). The xml type tag

FLAGSENABLECOOKIES

With this flag, the client will be able to handle cookies, meaning saving cookies from the server and sending it with every other request again. This is needed for some XML-RPC interfaces that support login.

FLAGS_NIL

The client will be able to send

null

null

FLAGSIGNORESTATUSCODE

With this flag enabled, the XML-RPC client will ignore the HTTP status code of the response from the server. According to specification the status code must be 200. This flag is only needed for the use with not standard compliant servers.

FLAGS_FORWARD

With this flag enabled, the client will forward the request, if the 301 or 302 HTTP status code has been received. If this flag is not set, the client will throw an exception on these HTTP status codes.

FLAGSSSLIGNOREINVALIDHOST

With this flag enabled, the client will ignore, if the URL doesn't match the SSL Certificate. This should be used with caution. Normally the URL should always match the URL in the SSL certificate, even with self signed certificates.

FLAGSSSLINGOREINVALIDCERT

With this flag enabled, the client will ignore all unverified SSL/TLS certificates. This must be used, if you use self-signed certificates or certificated from unknown (or untrusted) authorities.

FLAGSDEFAULTTYPE_STRING

With this flag enabled, a value with a missing type tag, will be parsed as a string element. This is just for incoming messages. Outgoing messages will still be generated according to specification.

FLAGSIGNORENAMESPACES

With this flag enabled, the client ignores all namespaces used within the response from the server.

FLAGSUSESYSTEM_PROXY

With this flag enabled, the XMLRPCClient will use the system http proxy to connect to the XML-RPC server.

FLAGSNOSTRING_ENCODE

By default outgoing string values will be encoded according to specification. Meaning the & sign will be encoded to

&

<

FLAGS_NO_STRING_DECODE

FLAGSNOSTRING_DECODE

This prevents the decoding of incoming strings, meaning

&

<

FLAGS_NO_STRING_ENCODE

FLAGS_DEBUG

Will display additional information on the console. Do not use it in production.

FLAGSACCEPTNULL_DATE

By default a response with an empty date (eg:

Meta Flags

This can be used exactly the same as normal flags. But each meta flag is just a collection of different other flags. There is no functional difference in using a meta flag or all the containing flags. For detailed documentation on the single flags read the above section.

FLAGSSSLIGNORE_ERRORS

This flag disables all SSL warnings. It is an alternative to use FLAGSSSLIGNOREINVALIDCERT | FLAGSSSLIGNOREINVALIDHOST.

FLAGSAPACHEWS

This flag should be used if the server is an apache ws xmlrpc server. This will set some flags, so that the not standard conform behavior of the server will be ignored. This will enable the following flags: FLAGSIGNORENAMESPACES, FLAGSNIL, FLAGSDEFAULTTYPESTRING

Using an arbitrary transport

aXMLRPC uses http with the java.net API. If you want to use another protocol or API, you can do:

    boolean debug = false;
    SerializerHandler serializerHandler = new SerializerHandler(); // or you may build it with flags
    String payload = new Call(serializerHandler, "add", 5, 10).getXML(debug);

InputStream istream = sendPayloadWithMyTransport(payload); // use your implementation here

Integer i = (Integer) new ResponseParser.parse(serializerHandler, istream, debug);

License

The library is licensed under MIT License. See the LICENSE file for the license text.

For the uninformed reader: What does MIT mean?

• You can copy this, modify it, distribute it, sell it, eat it.
• You don't need to notice me about anything of the above.
• If you make changes to it, it would be nice (but not obliged), if you would share it with me again.
• Put the copyright notice and the LICENSE file in any copy you make.

Bugs?

If you find a bug or wish some enhancements for the library, please fill an issue here on github.

Build status

Status: