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85ea1a5d64
Re-adding back Azure authentication support to Prometheus datasource after the datasource query logic was rewritten from plugin.json routes to Go backend. Ref #35857
99 lines
2.3 KiB
Go
99 lines
2.3 KiB
Go
package promclient
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import (
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"strings"
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"github.com/grafana/grafana-plugin-sdk-go/backend"
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"github.com/grafana/grafana/pkg/tsdb/prometheus/middleware"
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"github.com/grafana/grafana/pkg/util/maputil"
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sdkhttpclient "github.com/grafana/grafana-plugin-sdk-go/backend/httpclient"
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"github.com/grafana/grafana/pkg/infra/httpclient"
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"github.com/grafana/grafana/pkg/infra/log"
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"github.com/prometheus/client_golang/api"
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apiv1 "github.com/prometheus/client_golang/api/prometheus/v1"
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)
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type Provider struct {
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settings backend.DataSourceInstanceSettings
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jsonData map[string]interface{}
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httpMethod string
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clientProvider httpclient.Provider
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log log.Logger
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}
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func NewProvider(
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settings backend.DataSourceInstanceSettings,
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jsonData map[string]interface{},
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clientProvider httpclient.Provider,
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log log.Logger,
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) *Provider {
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httpMethod, _ := maputil.GetStringOptional(jsonData, "httpMethod")
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return &Provider{
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settings: settings,
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jsonData: jsonData,
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httpMethod: httpMethod,
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clientProvider: clientProvider,
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log: log,
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}
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}
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func (p *Provider) GetClient(headers map[string]string) (apiv1.API, error) {
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opts, err := p.settings.HTTPClientOptions()
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if err != nil {
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return nil, err
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}
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opts.Middlewares = p.middlewares()
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opts.Headers = reqHeaders(headers)
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// Set SigV4 service namespace
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if opts.SigV4 != nil {
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opts.SigV4.Service = "aps"
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}
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// Azure authentication
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err = p.configureAzureAuthentication(opts)
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if err != nil {
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return nil, err
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}
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roundTripper, err := p.clientProvider.GetTransport(opts)
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if err != nil {
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return nil, err
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}
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cfg := api.Config{
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Address: p.settings.URL,
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RoundTripper: roundTripper,
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}
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client, err := api.NewClient(cfg)
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if err != nil {
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return nil, err
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}
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return apiv1.NewAPI(client), nil
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}
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func (p *Provider) middlewares() []sdkhttpclient.Middleware {
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middlewares := []sdkhttpclient.Middleware{
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middleware.CustomQueryParameters(p.log),
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sdkhttpclient.CustomHeadersMiddleware(),
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}
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if strings.ToLower(p.httpMethod) == "get" {
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middlewares = append(middlewares, middleware.ForceHttpGet(p.log))
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}
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return middlewares
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}
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func reqHeaders(headers map[string]string) map[string]string {
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// copy to avoid changing the original map
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h := make(map[string]string, len(headers))
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for k, v := range headers {
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h[k] = v
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}
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return h
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}
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