Fix volumes and networks list/prune filters in http api

This is the continuation work started in #9711. It turns out
that list/prune commands for volumes in libpod/compat api have
very dangerous error handling when broken filter input is supplied.
Problem also affects network list/prune in libpod. This commit
unifies filter handling across libpod/compat api and adds sanity
apiv2 testcases.

Signed-off-by: Jakub Guzik <jakubmguzik@gmail.com>

2 files changed, 21 insertions, 40 deletions

diff --git a/pkg/api/handlers/libpod/networks.go b/pkg/api/handlers/libpod/networks.go
index 19c9ed658..5417f778e 100644
--- a/pkg/api/handlers/libpod/networks.go
+++ b/pkg/api/handlers/libpod/networks.go
@@ -10,6 +10,7 @@ import (
 	"github.com/containers/podman/v3/pkg/api/handlers/utils"
 	"github.com/containers/podman/v3/pkg/domain/entities"
 	"github.com/containers/podman/v3/pkg/domain/infra/abi"
+	"github.com/containers/podman/v3/pkg/util"
 	"github.com/gorilla/schema"
 	"github.com/pkg/errors"
 )
@@ -45,20 +46,15 @@ func CreateNetwork(w http.ResponseWriter, r *http.Request) {
 }
 func ListNetworks(w http.ResponseWriter, r *http.Request) {
 	runtime := r.Context().Value("runtime").(*libpod.Runtime)
-	decoder := r.Context().Value("decoder").(*schema.Decoder)
-	query := struct {
-		Filters map[string][]string `schema:"filters"`
-	}{
-		// override any golang type defaults
-	}
-	if err := decoder.Decode(&query, r.URL.Query()); err != nil {
-		utils.Error(w, http.StatusText(http.StatusBadRequest), http.StatusBadRequest,
+	filterMap, err := util.PrepareFilters(r)
+	if err != nil {
+		utils.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError,
 			errors.Wrapf(err, "failed to parse parameters for %s", r.URL.String()))
 		return
 	}
 
 	options := entities.NetworkListOptions{
-		Filters: query.Filters,
+		Filters: *filterMap,
 	}
 	ic := abi.ContainerEngine{Libpod: runtime}
 	reports, err := ic.NetworkList(r.Context(), options)
@@ -78,7 +74,7 @@ func RemoveNetwork(w http.ResponseWriter, r *http.Request) {
 		// override any golang type defaults
 	}
 	if err := decoder.Decode(&query, r.URL.Query()); err != nil {
-		utils.Error(w, http.StatusText(http.StatusBadRequest), http.StatusBadRequest,
+		utils.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError,
 			errors.Wrapf(err, "failed to parse parameters for %s", r.URL.String()))
 		return
 	}
@@ -111,7 +107,7 @@ func InspectNetwork(w http.ResponseWriter, r *http.Request) {
 		// override any golang type defaults
 	}
 	if err := decoder.Decode(&query, r.URL.Query()); err != nil {
-		utils.Error(w, http.StatusText(http.StatusBadRequest), http.StatusBadRequest,
+		utils.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError,
 			errors.Wrapf(err, "failed to parse parameters for %s", r.URL.String()))
 		return
 	}
@@ -178,20 +174,15 @@ func ExistsNetwork(w http.ResponseWriter, r *http.Request) {
 // Prune removes unused networks
 func Prune(w http.ResponseWriter, r *http.Request) {
 	runtime := r.Context().Value("runtime").(*libpod.Runtime)
-	decoder := r.Context().Value("decoder").(*schema.Decoder)
-	query := struct {
-		Filters map[string][]string `schema:"filters"`
-	}{
-		// override any golang type defaults
-	}
 
-	if err := decoder.Decode(&query, r.URL.Query()); err != nil {
+	filterMap, err := util.PrepareFilters(r)
+	if err != nil {
 		utils.Error(w, "Something went wrong.", http.StatusInternalServerError, err)
 		return
 	}
 
 	pruneOptions := entities.NetworkPruneOptions{
-		Filters: query.Filters,
+		Filters: *filterMap,
 	}
 	ic := abi.ContainerEngine{Libpod: runtime}
 	pruneReports, err := ic.NetworkPrune(r.Context(), pruneOptions)
diff --git a/pkg/api/handlers/libpod/volumes.go b/pkg/api/handlers/libpod/volumes.go
index a602e6744..442b53d1e 100644
--- a/pkg/api/handlers/libpod/volumes.go
+++ b/pkg/api/handlers/libpod/volumes.go
@@ -13,6 +13,7 @@ import (
 	"github.com/containers/podman/v3/pkg/domain/filters"
 	"github.com/containers/podman/v3/pkg/domain/infra/abi"
 	"github.com/containers/podman/v3/pkg/domain/infra/abi/parse"
+	"github.com/containers/podman/v3/pkg/util"
 	"github.com/gorilla/schema"
 	"github.com/pkg/errors"
 )
@@ -29,7 +30,7 @@ func CreateVolume(w http.ResponseWriter, r *http.Request) {
 	}
 	input := entities.VolumeCreateOptions{}
 	if err := decoder.Decode(&query, r.URL.Query()); err != nil {
-		utils.Error(w, http.StatusText(http.StatusBadRequest), http.StatusBadRequest,
+		utils.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError,
 			errors.Wrapf(err, "failed to parse parameters for %s", r.URL.String()))
 		return
 	}
@@ -95,22 +96,16 @@ func InspectVolume(w http.ResponseWriter, r *http.Request) {
 
 func ListVolumes(w http.ResponseWriter, r *http.Request) {
 	var (
-		decoder = r.Context().Value("decoder").(*schema.Decoder)
 		runtime = r.Context().Value("runtime").(*libpod.Runtime)
 	)
-	query := struct {
-		Filters map[string][]string `schema:"filters"`
-	}{
-		// override any golang type defaults
-	}
-
-	if err := decoder.Decode(&query, r.URL.Query()); err != nil {
-		utils.Error(w, http.StatusText(http.StatusBadRequest), http.StatusBadRequest,
+	filterMap, err := util.PrepareFilters(r)
+	if err != nil {
+		utils.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError,
 			errors.Wrapf(err, "failed to parse parameters for %s", r.URL.String()))
 		return
 	}
 
-	volumeFilters, err := filters.GenerateVolumeFilters(query.Filters)
+	volumeFilters, err := filters.GenerateVolumeFilters(*filterMap)
 	if err != nil {
 		utils.InternalServerError(w, err)
 		return
@@ -148,19 +143,13 @@ func PruneVolumes(w http.ResponseWriter, r *http.Request) {
 func pruneVolumesHelper(r *http.Request) ([]*reports.PruneReport, error) {
 	var (
 		runtime = r.Context().Value("runtime").(*libpod.Runtime)
-		decoder = r.Context().Value("decoder").(*schema.Decoder)
 	)
-	query := struct {
-		Filters map[string][]string `schema:"filters"`
-	}{
-		// override any golang type defaults
-	}
-
-	if err := decoder.Decode(&query, r.URL.Query()); err != nil {
+	filterMap, err := util.PrepareFilters(r)
+	if err != nil {
 		return nil, err
 	}
 
-	f := (url.Values)(query.Filters)
+	f := (url.Values)(*filterMap)
 	filterFuncs, err := filters.GenerateVolumeFilters(f)
 	if err != nil {
 		return nil, err
@@ -172,6 +161,7 @@ func pruneVolumesHelper(r *http.Request) ([]*reports.PruneReport, error) {
 	}
 	return reports, nil
 }
+
 func RemoveVolume(w http.ResponseWriter, r *http.Request) {
 	var (
 		runtime = r.Context().Value("runtime").(*libpod.Runtime)
@@ -184,7 +174,7 @@ func RemoveVolume(w http.ResponseWriter, r *http.Request) {
 	}
 
 	if err := decoder.Decode(&query, r.URL.Query()); err != nil {
-		utils.Error(w, http.StatusText(http.StatusBadRequest), http.StatusBadRequest,
+		utils.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError,
 			errors.Wrapf(err, "failed to parse parameters for %s", r.URL.String()))
 		return
 	}