mirror of
https://gitlab.com/pulsechaincom/prysm-pulse.git
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700f5fee8c
* add context to beacon APIs * add TODO to merge GET and POST methods * fix linter action Co-authored-by: kasey <489222+kasey@users.noreply.github.com> Co-authored-by: james-prysm <90280386+james-prysm@users.noreply.github.com>
104 lines
3.6 KiB
Go
104 lines
3.6 KiB
Go
package beacon_api
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import (
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"bytes"
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"context"
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"encoding/json"
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"net/http"
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"github.com/pkg/errors"
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"github.com/prysmaticlabs/prysm/v3/api/gateway/apimiddleware"
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)
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type jsonRestHandler interface {
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GetRestJsonResponse(ctx context.Context, query string, responseJson interface{}) (*apimiddleware.DefaultErrorJson, error)
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PostRestJson(ctx context.Context, apiEndpoint string, headers map[string]string, data *bytes.Buffer, responseJson interface{}) (*apimiddleware.DefaultErrorJson, error)
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}
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type beaconApiJsonRestHandler struct {
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httpClient http.Client
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host string
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}
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// GetRestJsonResponse sends a GET requests to apiEndpoint and decodes the response body as a JSON object into responseJson.
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// If an HTTP error is returned, the body is decoded as a DefaultErrorJson JSON object instead and returned as the first return value.
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// TODO: GetRestJsonResponse and PostRestJson have converged to the point of being nearly identical, but with some inconsistencies
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// (like responseJson is being checked for nil one but not the other). We should merge them into a single method
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// with variadic functional options for headers and data.
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func (c beaconApiJsonRestHandler) GetRestJsonResponse(ctx context.Context, apiEndpoint string, responseJson interface{}) (*apimiddleware.DefaultErrorJson, error) {
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if responseJson == nil {
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return nil, errors.New("responseJson is nil")
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}
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url := c.host + apiEndpoint
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req, err := http.NewRequestWithContext(ctx, http.MethodGet, url, nil)
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if err != nil {
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return nil, errors.Wrap(err, "failed to create request with context")
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}
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resp, err := c.httpClient.Do(req)
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if err != nil {
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return nil, errors.Wrapf(err, "failed to query REST API %s", url)
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}
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defer func() {
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if err := resp.Body.Close(); err != nil {
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return
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}
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}()
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return decodeJsonResp(resp, responseJson)
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}
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// PostRestJson sends a POST requests to apiEndpoint and decodes the response body as a JSON object into responseJson. If responseJson
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// is nil, nothing is decoded. If an HTTP error is returned, the body is decoded as a DefaultErrorJson JSON object instead and returned
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// as the first return value.
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func (c beaconApiJsonRestHandler) PostRestJson(ctx context.Context, apiEndpoint string, headers map[string]string, data *bytes.Buffer, responseJson interface{}) (*apimiddleware.DefaultErrorJson, error) {
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if data == nil {
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return nil, errors.New("POST data is nil")
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}
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url := c.host + apiEndpoint
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req, err := http.NewRequestWithContext(ctx, http.MethodPost, url, data)
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if err != nil {
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return nil, errors.Wrap(err, "failed to create request with context")
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}
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for headerKey, headerValue := range headers {
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req.Header.Set(headerKey, headerValue)
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}
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resp, err := c.httpClient.Do(req)
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if err != nil {
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return nil, errors.Wrapf(err, "failed to send POST data to REST endpoint %s", url)
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}
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defer func() {
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if err = resp.Body.Close(); err != nil {
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return
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}
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}()
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return decodeJsonResp(resp, responseJson)
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}
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func decodeJsonResp(resp *http.Response, responseJson interface{}) (*apimiddleware.DefaultErrorJson, error) {
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decoder := json.NewDecoder(resp.Body)
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decoder.DisallowUnknownFields()
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if resp.StatusCode != http.StatusOK {
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errorJson := &apimiddleware.DefaultErrorJson{}
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if err := decoder.Decode(errorJson); err != nil {
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return nil, errors.Wrapf(err, "failed to decode error json for %s", resp.Request.URL)
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}
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return errorJson, errors.Errorf("error %d: %s", errorJson.Code, errorJson.Message)
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}
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if responseJson != nil {
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if err := decoder.Decode(responseJson); err != nil {
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return nil, errors.Wrapf(err, "failed to decode response json for %s", resp.Request.URL)
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}
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}
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return nil, nil
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}
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