170 lines
3.3 KiB
Go
170 lines
3.3 KiB
Go
package xmlrpc
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import (
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"errors"
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"fmt"
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"io/ioutil"
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"net/http"
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"net/http/cookiejar"
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"net/rpc"
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"net/url"
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"sync"
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)
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type Client struct {
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*rpc.Client
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}
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// clientCodec is rpc.ClientCodec interface implementation.
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type clientCodec struct {
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// url presents url of xmlrpc service
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url *url.URL
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// httpClient works with HTTP protocol
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httpClient *http.Client
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// cookies stores cookies received on last request
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cookies http.CookieJar
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// responses presents map of active requests. It is required to return request id, that
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// rpc.Client can mark them as done.
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responses map[uint64]*http.Response
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mutex sync.Mutex
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response *Response
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// ready presents channel, that is used to link request and it`s response.
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ready chan uint64
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// close notifies codec is closed.
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close chan uint64
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}
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func (codec *clientCodec) WriteRequest(request *rpc.Request, args interface{}) (err error) {
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httpRequest, err := NewRequest(codec.url.String(), request.ServiceMethod, args)
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if codec.cookies != nil {
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for _, cookie := range codec.cookies.Cookies(codec.url) {
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httpRequest.AddCookie(cookie)
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}
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}
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if err != nil {
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return err
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}
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var httpResponse *http.Response
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httpResponse, err = codec.httpClient.Do(httpRequest)
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if err != nil {
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return err
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}
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if codec.cookies != nil {
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codec.cookies.SetCookies(codec.url, httpResponse.Cookies())
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}
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codec.mutex.Lock()
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codec.responses[request.Seq] = httpResponse
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codec.mutex.Unlock()
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codec.ready <- request.Seq
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return nil
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}
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func (codec *clientCodec) ReadResponseHeader(response *rpc.Response) (err error) {
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var seq uint64
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select {
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case seq = <-codec.ready:
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case <-codec.close:
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return errors.New("codec is closed")
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}
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codec.mutex.Lock()
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httpResponse := codec.responses[seq]
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codec.mutex.Unlock()
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if httpResponse.StatusCode < 200 || httpResponse.StatusCode >= 300 {
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return fmt.Errorf("request error: bad status code - %d", httpResponse.StatusCode)
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}
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respData, err := ioutil.ReadAll(httpResponse.Body)
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if err != nil {
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return err
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}
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httpResponse.Body.Close()
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resp := NewResponse(respData)
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if resp.Failed() {
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response.Error = fmt.Sprintf("%v", resp.Err())
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}
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codec.response = resp
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response.Seq = seq
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codec.mutex.Lock()
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delete(codec.responses, seq)
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codec.mutex.Unlock()
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return nil
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}
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func (codec *clientCodec) ReadResponseBody(v interface{}) (err error) {
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if v == nil {
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return nil
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}
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if err = codec.response.Unmarshal(v); err != nil {
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return err
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}
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return nil
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}
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func (codec *clientCodec) Close() error {
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transport := codec.httpClient.Transport.(*http.Transport)
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transport.CloseIdleConnections()
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close(codec.close)
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return nil
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}
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// NewClient returns instance of rpc.Client object, that is used to send request to xmlrpc service.
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func NewClient(requrl string, transport http.RoundTripper) (*Client, error) {
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if transport == nil {
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transport = http.DefaultTransport
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}
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httpClient := &http.Client{Transport: transport}
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jar, err := cookiejar.New(nil)
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if err != nil {
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return nil, err
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}
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u, err := url.Parse(requrl)
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if err != nil {
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return nil, err
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}
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codec := clientCodec{
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url: u,
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httpClient: httpClient,
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close: make(chan uint64),
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ready: make(chan uint64),
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responses: make(map[uint64]*http.Response),
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cookies: jar,
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}
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return &Client{rpc.NewClientWithCodec(&codec)}, nil
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}
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