forked from cloudfoundry/cli
/
connection.go
178 lines (146 loc) · 3.86 KB
/
connection.go
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package cloudcontrollerv2
import (
"bytes"
"crypto/tls"
"crypto/x509"
"encoding/json"
"net/http"
"net/url"
"strings"
"github.com/tedsuo/rata"
)
type Connection struct {
HTTPClient *http.Client
URL string
requestGenerator *rata.RequestGenerator
}
type Request struct {
RequestName string
Params rata.Params
// Query url.Values
// Body *bytes.Buffer
}
type Response struct {
Result interface{}
Warnings []string
}
func NewConnection(APIURL string, skipSSLValidation bool) *Connection {
tr := &http.Transport{
TLSClientConfig: &tls.Config{
InsecureSkipVerify: skipSSLValidation,
},
}
return &Connection{
HTTPClient: &http.Client{Transport: tr},
URL: strings.TrimRight(APIURL, "/"),
requestGenerator: rata.NewRequestGenerator(APIURL, Routes),
}
}
func (connection *Connection) Make(passedRequest Request, passedResponse *Response) error {
req, err := connection.createHTTPRequest(passedRequest)
if err != nil {
return err
}
response, err := connection.HTTPClient.Do(req)
if err != nil {
return connection.processRequestErrors(err)
}
defer response.Body.Close()
return connection.populateResponse(response, passedResponse)
}
func (connection *Connection) createHTTPRequest(passedRequest Request) (*http.Request, error) {
body := connection.getBody(passedRequest)
req, err := connection.requestGenerator.CreateRequest(
passedRequest.RequestName,
passedRequest.Params,
body,
)
if err != nil {
return nil, err
}
// req.URL.RawQuery = passedRequest.Query.Encode()
// for h, vs := range passedRequest.Header {
// for _, v := range vs {
// req.Header.Add(h, v)
// }
// }
return req, nil
}
func (connection *Connection) getBody(passedRequest Request) *bytes.Buffer {
// if passedRequest.Body != nil {
// if _, ok := passedRequest.Header["Content-Type"]; !ok {
// panic("You must pass a 'Content-Type' Header with a body")
// }
// return passedRequest.Body
// }
return &bytes.Buffer{}
}
func (_ *Connection) processRequestErrors(err error) error {
switch e := err.(type) {
case *url.Error:
if _, ok := e.Err.(x509.UnknownAuthorityError); ok {
return UnverifiedServerError{}
}
return RequestError(e)
default:
return err
}
}
func (connection *Connection) populateResponse(response *http.Response, passedResponse *Response) error {
err := connection.handleStatusCodes(response)
if err != nil {
return err
}
if rawWarnings := response.Header.Get("X-Cf-Warnings"); rawWarnings != "" {
passedResponse.Warnings = []string{}
for _, warning := range strings.Split(rawWarnings, ",") {
warningTrimmed := strings.Trim(warning, " ")
passedResponse.Warnings = append(passedResponse.Warnings, warningTrimmed)
}
}
// if response.StatusCode < 200 || response.StatusCode >= 300 {
// body, _ := ioutil.ReadAll(response.Body)
// return UnexpectedResponseError{
// StatusCode: response.StatusCode,
// Status: response.Status,
// Body: string(body),
// }
// }
// if passedResponse == nil {
// return nil
// }
// switch response.StatusCode {
// case http.StatusNoContent:
// return nil
// case http.StatusCreated:
// passedResponse.Created = true
// }
// if passedResponse.Headers != nil {
// for k, v := range response.Header {
// (*passedResponse.Headers)[k] = v
// }
// }
// if returnResponseBody {
// passedResponse.Result = response.Body
// return nil
// }
// if passedResponse.Result == nil {
// return nil
// }
err = json.NewDecoder(response.Body).Decode(passedResponse.Result)
if err != nil {
return err
}
return nil
}
func (_ *Connection) handleStatusCodes(response *http.Response) error {
switch response.StatusCode {
case http.StatusNotFound:
return ResourceNotFoundError{}
case http.StatusUnauthorized:
return UnauthorizedError{}
case http.StatusForbidden:
return ForbiddenError{}
}
return nil
}