V2 Implement terminal handling in bindings attach

* Add support for /exec/{id}/resize
* Add support for ErrSessionNotFound
* Resize container TTY as stdin changes size
* Refactor all resize functions into one handler

Signed-off-by: Jhon Honce <jhonce@redhat.com>

1 files changed, 68 insertions, 0 deletions

diff --git a/pkg/api/handlers/compat/resize.go b/pkg/api/handlers/compat/resize.go
new file mode 100644
index 000000000..3ead733bc
--- /dev/null
+++ b/pkg/api/handlers/compat/resize.go
@@ -0,0 +1,68 @@
+package compat
+
+import (
+	"net/http"
+	"strings"
+
+	"github.com/containers/libpod/libpod"
+	"github.com/containers/libpod/pkg/api/handlers/utils"
+	"github.com/gorilla/schema"
+	"github.com/pkg/errors"
+	"k8s.io/client-go/tools/remotecommand"
+)
+
+func ResizeTTY(w http.ResponseWriter, r *http.Request) {
+	runtime := r.Context().Value("runtime").(*libpod.Runtime)
+	decoder := r.Context().Value("decoder").(*schema.Decoder)
+
+	// /containers/{id}/resize
+	query := struct {
+		height uint16 `schema:"h"`
+		width  uint16 `schema:"w"`
+	}{
+		// override any golang type defaults
+	}
+
+	if err := decoder.Decode(&query, r.URL.Query()); err != nil {
+		utils.Error(w, http.StatusText(http.StatusBadRequest), http.StatusBadRequest,
+			errors.Wrapf(err, "Failed to parse parameters for %s", r.URL.String()))
+		return
+	}
+
+	sz := remotecommand.TerminalSize{
+		Width:  query.width,
+		Height: query.height,
+	}
+
+	var status int
+	name := utils.GetName(r)
+	switch {
+	case strings.Contains(r.URL.Path, "/containers/"):
+		ctnr, err := runtime.LookupContainer(name)
+		if err != nil {
+			utils.ContainerNotFound(w, name, err)
+			return
+		}
+		if err := ctnr.AttachResize(sz); err != nil {
+			utils.InternalServerError(w, errors.Wrapf(err, "cannot resize container"))
+			return
+		}
+		// This is not a 204, even though we write nothing, for compatibility
+		// reasons.
+		status = http.StatusOK
+	case strings.Contains(r.URL.Path, "/exec/"):
+		ctnr, err := runtime.GetExecSessionContainer(name)
+		if err != nil {
+			utils.SessionNotFound(w, name, err)
+			return
+		}
+		if err := ctnr.ExecResize(name, sz); err != nil {
+			utils.InternalServerError(w, errors.Wrapf(err, "cannot resize session"))
+			return
+		}
+		// This is not a 204, even though we write nothing, for compatibility
+		// reasons.
+		status = http.StatusCreated
+	}
+	utils.WriteResponse(w, status, "")
+}