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80 lines
2.6 KiB
Markdown
80 lines
2.6 KiB
Markdown
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## Overview
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xmlrpc is an implementation of client side part of XMLRPC protocol in Go language.
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## Installation
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To install xmlrpc package run `go get github.com/kolo/xmlrpc`. To use
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it in application add `"github.com/kolo/xmlrpc"` string to `import`
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statement.
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## Usage
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client, _ := xmlrpc.NewClient("https://bugzilla.mozilla.org/xmlrpc.cgi", nil)
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result := struct{
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Version string `xmlrpc:"version"`
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}{}
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client.Call("Bugzilla.version", nil, &result)
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fmt.Printf("Version: %s\n", result.Version) // Version: 4.2.7+
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Second argument of NewClient function is an object that implements
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[http.RoundTripper](http://golang.org/pkg/net/http/#RoundTripper)
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interface, it can be used to get more control over connection options.
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By default it initialized by http.DefaultTransport object.
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### Arguments encoding
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xmlrpc package supports encoding of native Go data types to method
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arguments.
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Data types encoding rules:
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* int, int8, int16, int32, int64 encoded to int;
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* float32, float64 encoded to double;
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* bool encoded to boolean;
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* string encoded to string;
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* time.Time encoded to datetime.iso8601;
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* xmlrpc.Base64 encoded to base64;
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* slice decoded to array;
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Structs decoded to struct by following rules:
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* all public field become struct members;
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* field name become member name;
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* if field has xmlrpc tag, its value become member name.
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Server method can accept few arguments, to handle this case there is
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special approach to handle slice of empty interfaces (`[]interface{}`).
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Each value of such slice encoded as separate argument.
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### Result decoding
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Result of remote function is decoded to native Go data type.
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Data types decoding rules:
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* int, i4 decoded to int, int8, int16, int32, int64;
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* double decoded to float32, float64;
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* boolean decoded to bool;
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* string decoded to string;
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* array decoded to slice;
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* structs decoded following the rules described in previous section;
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* datetime.iso8601 decoded as time.Time data type;
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* base64 decoded to string.
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## Implementation details
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xmlrpc package contains clientCodec type, that implements [rpc.ClientCodec](http://golang.org/pkg/net/rpc/#ClientCodec)
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interface of [net/rpc](http://golang.org/pkg/net/rpc) package.
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xmlrpc package works over HTTP protocol, but some internal functions
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and data type were made public to make it easier to create another
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implementation of xmlrpc that works over another protocol. To encode
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request body there is EncodeMethodCall function. To decode server
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response Response data type can be used.
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## Contribution
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Feel free to fork the project, submit pull requests, ask questions.
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## Authors
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Dmitry Maksimov (dmtmax@gmail.com)
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