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Plugins: Automatically forward plugin request HTTP headers in outgoing HTTP requests (#60417)

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Automatically forward core plugin request HTTP headers in outgoing HTTP requests. 
Core datasource plugin authors don't have to specifically handle forwarding of HTTP 
headers, e.g. do not have to "hardcode" the header-names in the datasource plugin, 
if not having custom needs.

Fixes #57065
This commit is contained in:
Marcus Efraimsson
2022-12-21 13:25:58 +01:00
committed by GitHub
parent aaab477594
commit c35c689a96
32 changed files with 816 additions and 1194 deletions
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32
pkg/services/pluginsintegration/clientmiddleware/user_header_middleware.go
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@ -2,19 +2,15 @@ package clientmiddleware
import (
"context"
"net/http"
"github.com/grafana/grafana-plugin-sdk-go/backend"
sdkhttpclient "github.com/grafana/grafana-plugin-sdk-go/backend/httpclient"
"github.com/grafana/grafana/pkg/infra/httpclient/httpclientprovider"
"github.com/grafana/grafana/pkg/plugins"
"github.com/grafana/grafana/pkg/services/contexthandler"
"github.com/grafana/grafana/pkg/util/proxyutil"
)
// NewUserHeaderMiddleware creates a new plugins.ClientMiddleware that will
// populate the X-Grafana-User header on outgoing plugins.Client and HTTP
// requests.
// populate the X-Grafana-User header on outgoing plugins.Client requests.
func NewUserHeaderMiddleware() plugins.ClientMiddleware {
return plugins.ClientMiddlewareFunc(func(next plugins.Client) plugins.Client {
return &UserHeaderMiddleware{
@ -27,33 +23,17 @@ type UserHeaderMiddleware struct {
next plugins.Client
}
func (m *UserHeaderMiddleware) applyToken(ctx context.Context, pCtx backend.PluginContext, h backend.ForwardHTTPHeaders) context.Context {
func (m *UserHeaderMiddleware) applyUserHeader(ctx context.Context, h backend.ForwardHTTPHeaders) {
reqCtx := contexthandler.FromContext(ctx)
// if no HTTP request context skip middleware
if h == nil || reqCtx == nil || reqCtx.Req == nil || reqCtx.SignedInUser == nil {
return ctx
return
}
h.DeleteHTTPHeader(proxyutil.UserHeaderName)
if !reqCtx.IsAnonymous {
h.SetHTTPHeader(proxyutil.UserHeaderName, reqCtx.Login)
}
middlewares := []sdkhttpclient.Middleware{}
if !reqCtx.IsAnonymous {
httpHeaders := http.Header{
proxyutil.UserHeaderName: []string{reqCtx.Login},
}
middlewares = append(middlewares, httpclientprovider.SetHeadersMiddleware(httpHeaders))
} else {
middlewares = append(middlewares, httpclientprovider.DeleteHeadersMiddleware(proxyutil.UserHeaderName))
}
ctx = sdkhttpclient.WithContextualMiddleware(ctx, middlewares...)
return ctx
}
func (m *UserHeaderMiddleware) QueryData(ctx context.Context, req *backend.QueryDataRequest) (*backend.QueryDataResponse, error) {
@ -61,7 +41,7 @@ func (m *UserHeaderMiddleware) QueryData(ctx context.Context, req *backend.Query
return m.next.QueryData(ctx, req)
}
ctx = m.applyToken(ctx, req.PluginContext, req)
m.applyUserHeader(ctx, req)
return m.next.QueryData(ctx, req)
}
@ -71,7 +51,7 @@ func (m *UserHeaderMiddleware) CallResource(ctx context.Context, req *backend.Ca
return m.next.CallResource(ctx, req, sender)
}
ctx = m.applyToken(ctx, req.PluginContext, req)
m.applyUserHeader(ctx, req)
return m.next.CallResource(ctx, req, sender)
}
@ -81,7 +61,7 @@ func (m *UserHeaderMiddleware) CheckHealth(ctx context.Context, req *backend.Che
return m.next.CheckHealth(ctx, req)
}
ctx = m.applyToken(ctx, req.PluginContext, req)
m.applyUserHeader(ctx, req)
return m.next.CheckHealth(ctx, req)
}