/
handler.go
67 lines (53 loc) · 1.78 KB
/
handler.go
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// Copyright 2024 Jeremy Collins. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package dims
import (
"log/slog"
"net/http"
)
func Handler(kernel Kernel, config Config, w http.ResponseWriter, r *http.Request) {
slog.Info("handleDims5()",
"imageUrl", r.URL.Query().Get("url"),
"clientId", r.PathValue("clientId"),
"signature", r.PathValue("signature"),
"timestamp", r.PathValue("timestamp"),
"commands", r.PathValue("commands"))
// Verify signature.
if !config.DevelopmentMode {
if kernel.ValidateSignature() == false {
kernel.SendError(w, 403, "verification failed.")
slog.Info("verification failed.")
return
}
}
// Download image.
if err := kernel.FetchImage(); err != nil {
slog.Error("downloadImage failed.", "error", err)
kernel.SendError(w, 500, "downloadImage failed.")
return
}
// Execute Imagemagick commands.
imageType, imageBlob, err := kernel.ProcessImage()
if err != nil {
slog.Error("executeImagemagick failed.", "error", err)
kernel.SendError(w, 500, "image processing failed.")
return
}
// Serve the image.
if err := kernel.SendImage(w, 200, imageType, imageBlob); err != nil {
slog.Error("serveImage failed.", "error", err)
http.Error(w, "Failed to serve image", http.StatusInternalServerError)
return
}
}