增加复制粘贴交互

backend/internal/httpapi/assets.go

@@ -5,6 +5,7 @@ import (
 	"errors"
 	"fmt"
 	"io"
+	"mime"
 	"net/http"
 	"net/url"
 	"path"
@@ -76,6 +77,8 @@ func (h *assetsHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 		h.platformCollection(w, r, method)
 	case "platform-upload":
 		h.upload(w, r, false)
+	case "platform-import-image":
+		h.importImage(w, r)
 	case "platform-item":
 		h.delete(w, r, values[0])
 	case "platform-download":
@@ -156,6 +159,45 @@ func (h *assetsHandler) publicCollection(w http.ResponseWriter, r *http.Request,
 	writeJSON(w, http.StatusCreated, map[string]any{"asset": created})
 }
 
+func (h *assetsHandler) importImage(w http.ResponseWriter, r *http.Request) {
+	scope, ok := h.platformScope(w, r)
+	if !ok {
+		return
+	}
+	mediaType, _, mediaErr := mime.ParseMediaType(r.Header.Get("Content-Type"))
+	if mediaErr != nil || mediaType != "application/json" {
+		writeAssetJSONError(w, http.StatusUnsupportedMediaType, "请使用 JSON 请求")
+		return
+	}
+	if r.Header.Get("Sec-Fetch-Site") == "cross-site" {
+		writeAssetJSONError(w, http.StatusForbidden, "跨站请求不被允许")
+		return
+	}
+	var input struct {
+		URL string `json:"url"`
+	}
+	if !decodeAssetJSON(w, r, h.config.MaxJSONBytes, &input) {
+		return
+	}
+	created, err := h.service.ImportImage(r.Context(), scope, input.URL)
+	if err != nil {
+		switch {
+		case errors.Is(err, assets.ErrImportImageURL):
+			writeAssetJSONError(w, http.StatusBadRequest, "图片地址无效，请使用 http 或 https 链接")
+		case errors.Is(err, assets.ErrRemoteTooLarge):
+			writeAssetJSONError(w, http.StatusRequestEntityTooLarge, "图片过大")
+		case errors.Is(err, assets.ErrImportImageUnsupported):
+			writeAssetJSONError(w, http.StatusUnsupportedMediaType, "不支持的图片格式")
+		case errors.Is(err, assets.ErrImportImageUnavailable):
+			writeAssetJSONError(w, http.StatusBadGateway, "图片地址不可访问")
+		default:
+			writeAssetJSONError(w, http.StatusInternalServerError, "Internal server error.")
+		}
+		return
+	}
+	writeJSON(w, http.StatusCreated, map[string]any{"asset": created})
+}
+
 type createAssetInput struct {
 	URL    string        `json:"url"`
 	Name   string        `json:"name"`
@@ -456,6 +498,9 @@ func matchAssetRoute(value string) (string, []string) {
 	if value == "/api/assets/upload" {
 		return "platform-upload", nil
 	}
+	if value == "/api/assets/import-image" {
+		return "platform-import-image", nil
+	}
 	if value == "/api/v1/assets" {
 		return "public-collection", nil
 	}
@@ -491,7 +536,7 @@ func assetRouteAllow(route string) string {
 	switch route {
 	case "platform-collection", "public-collection":
 		return "GET, HEAD, POST, OPTIONS"
-	case "platform-upload":
+	case "platform-upload", "platform-import-image":
 		return "POST, OPTIONS"
 	case "platform-item":
 		return "DELETE, OPTIONS"