/
plugin_connection.go
121 lines (104 loc) · 2.98 KB
/
plugin_connection.go
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package plugin
import (
"bytes"
"crypto/tls"
"crypto/x509"
"encoding/json"
"io"
"io/ioutil"
"net"
"net/http"
"net/url"
"time"
"code.cloudfoundry.org/cli/api/plugin/pluginerror"
)
// PluginConnection represents a connection to a plugin repo.
type PluginConnection struct {
HTTPClient *http.Client
proxyReader ProxyReader
}
// NewConnection returns a new PluginConnection
func NewConnection(skipSSLValidation bool, dialTimeout time.Duration) *PluginConnection {
tr := &http.Transport{
TLSClientConfig: &tls.Config{
InsecureSkipVerify: skipSSLValidation,
},
Proxy: http.ProxyFromEnvironment,
DialContext: (&net.Dialer{
KeepAlive: 30 * time.Second,
Timeout: dialTimeout,
}).DialContext,
}
return &PluginConnection{
HTTPClient: &http.Client{Transport: tr},
}
}
// Make performs the request and parses the response.
func (connection *PluginConnection) Make(request *http.Request, passedResponse *Response, proxyReader ProxyReader) error {
// In case this function is called from a retry, passedResponse may already
// be populated with a previous response. We reset in case there's an HTTP
// error and we don't repopulate it in populateResponse.
passedResponse.reset()
response, err := connection.HTTPClient.Do(request)
if err != nil {
return connection.processRequestErrors(request, err)
}
body := response.Body
if proxyReader != nil {
proxyReader.Start(response.ContentLength)
defer proxyReader.Finish()
body = proxyReader.Wrap(response.Body)
}
return connection.populateResponse(response, passedResponse, body)
}
func (*PluginConnection) handleStatusCodes(response *http.Response, passedResponse *Response) error {
if response.StatusCode >= 400 {
return pluginerror.RawHTTPStatusError{
Status: response.Status,
RawResponse: passedResponse.RawResponse,
}
}
return nil
}
func (connection *PluginConnection) populateResponse(response *http.Response, passedResponse *Response, body io.ReadCloser) error {
passedResponse.HTTPResponse = response
rawBytes, err := ioutil.ReadAll(body)
defer body.Close()
if err != nil {
return err
}
passedResponse.RawResponse = rawBytes
err = connection.handleStatusCodes(response, passedResponse)
if err != nil {
return err
}
if passedResponse.Result != nil {
decoder := json.NewDecoder(bytes.NewBuffer(passedResponse.RawResponse))
decoder.UseNumber()
err = decoder.Decode(passedResponse.Result)
if err != nil {
return err
}
}
return nil
}
// processRequestError handles errors that occur while making the request.
func (connection *PluginConnection) processRequestErrors(request *http.Request, err error) error {
switch e := err.(type) {
case *url.Error:
switch urlErr := e.Err.(type) {
case x509.UnknownAuthorityError:
return pluginerror.UnverifiedServerError{
URL: request.URL.String(),
}
case x509.HostnameError:
return pluginerror.SSLValidationHostnameError{
Message: urlErr.Error(),
}
default:
return pluginerror.RequestError{Err: e}
}
default:
return err
}
}