api/plugins/http_proxy/handler.go
baez90 57a7e10e74
Add Prometheus metrics (#10)
* Add Prometheus metrics

- cleanup
- update dependencies
- improve parsing of options where possible
- Update Go to latest version
2020-10-02 11:56:48 +02:00

80 lines
1.7 KiB
Go

package http_proxy
import (
"context"
"errors"
"fmt"
"github.com/baez90/inetmock/pkg/api"
"github.com/baez90/inetmock/pkg/config"
"github.com/baez90/inetmock/pkg/logging"
"go.uber.org/zap"
"gopkg.in/elazarl/goproxy.v1"
"net/http"
)
const (
name = "http_proxy"
)
type httpProxy struct {
logger logging.Logger
proxy *goproxy.ProxyHttpServer
server *http.Server
}
func (h *httpProxy) Start(config config.HandlerConfig) (err error) {
var opts httpProxyOptions
if err = config.Options.Unmarshal(&opts); err != nil {
return
}
listenAddr := config.ListenAddr()
h.server = &http.Server{Addr: listenAddr, Handler: h.proxy}
h.logger = h.logger.With(
zap.String("handler_name", config.HandlerName),
zap.String("address", listenAddr),
)
tlsConfig := api.ServicesInstance().CertStore().TLSConfig()
proxyHandler := &proxyHttpHandler{
handlerName: config.HandlerName,
options: opts,
logger: h.logger,
}
proxyHttpsHandler := &proxyHttpsHandler{
handlerName: config.HandlerName,
tlsConfig: tlsConfig,
logger: h.logger,
}
h.proxy.OnRequest().Do(proxyHandler)
h.proxy.OnRequest().HandleConnect(proxyHttpsHandler)
go h.startProxy()
return
}
func (h *httpProxy) startProxy() {
if err := h.server.ListenAndServe(); err != nil && !errors.Is(err, http.ErrServerClosed) {
h.logger.Error(
"failed to start proxy server",
zap.Error(err),
)
}
}
func (h *httpProxy) Shutdown(ctx context.Context) (err error) {
h.logger.Info("Shutting down HTTP proxy")
if err = h.server.Shutdown(ctx); err != nil {
h.logger.Error(
"failed to shutdown proxy endpoint",
zap.Error(err),
)
err = fmt.Errorf(
"failed to shutdown proxy endpoint: %w",
err,
)
}
return
}