remove any temporary files associated with a Form, fixes #347.

.docker/chromium/Dockerfile

@@ -10,7 +10,7 @@ RUN set -eux; \
     #
     # install widevine module
     CHROMIUM_DIR="/usr/lib/chromium"; \
-    WIDEVINE_VERSION=$(wget --quiet -O - https://dl.google.com/widevine-cdm/versions.txt | tail -n 1); \
+    WIDEVINE_VERSION=$(wget --quiet -O - https://dl.google.com/widevine-cdm/versions.txt | sort --version-sort | tail -n 1); \
     wget -O /tmp/widevine.zip "https://dl.google.com/widevine-cdm/${WIDEVINE_VERSION}-linux-x64.zip"; \
     mkdir -p "${CHROMIUM_DIR}/WidevineCdm/_platform_specific/linux_x64"; \
     unzip -p /tmp/widevine.zip LICENSE.txt > "${CHROMIUM_DIR}/WidevineCdm/LICENSE"; \

.docker/chromium/Dockerfile.nvidia

@@ -14,7 +14,7 @@ RUN set -eux; \
     #
     # install widevine module
     CHROMIUM_DIR="/usr/lib/chromium"; \
-    WIDEVINE_VERSION=$(wget --quiet -O - https://dl.google.com/widevine-cdm/versions.txt | tail -n 1); \
+    WIDEVINE_VERSION=$(wget --quiet -O - https://dl.google.com/widevine-cdm/versions.txt | sort --version-sort | tail -n 1); \
     wget -O /tmp/widevine.zip "https://dl.google.com/widevine-cdm/${WIDEVINE_VERSION}-linux-x64.zip"; \
     mkdir -p "${CHROMIUM_DIR}/WidevineCdm/_platform_specific/linux_x64"; \
     unzip -p /tmp/widevine.zip LICENSE.txt > "${CHROMIUM_DIR}/WidevineCdm/LICENSE"; \

.docker/microsoft-edge/Dockerfile

@@ -8,7 +8,7 @@ ARG API_URL="https://packages.microsoft.com/repos/edge/pool/main/m/microsoft-edg
 RUN set -eux; apt-get update; \
     #
     # fetch latest release
-    SRC_URL="${API_URL}$(wget -O - "${API_URL}" 2>/dev/null | sed -n 's/.*href="\([^"]*\).*/\1/p' | tail -1)"; \
+    SRC_URL="${API_URL}$(wget -O - "${API_URL}" 2>/dev/null | sed -n 's/.*href="\([^"]*\).*/\1/p' | sort --version-sort | tail -1)"; \
     wget -O /tmp/microsoft-edge.deb "${SRC_URL}"; \
     apt-get install -y --no-install-recommends openbox /tmp/microsoft-edge.deb; \
     #

.docker/microsoft-edge/Dockerfile.nvidia

@@ -8,7 +8,7 @@ ARG API_URL="https://packages.microsoft.com/repos/edge/pool/main/m/microsoft-edg
 RUN set -eux; apt-get update; \
     #
     # fetch latest release
-    SRC_URL="${API_URL}$(wget -O - "${API_URL}" 2>/dev/null | sed -n 's/.*href="\([^"]*\).*/\1/p' | tail -1)"; \
+    SRC_URL="${API_URL}$(wget -O - "${API_URL}" 2>/dev/null | sed -n 's/.*href="\([^"]*\).*/\1/p' | sort --version-sort | tail -1)"; \
     wget -O /tmp/microsoft-edge.deb "${SRC_URL}"; \
     apt-get install -y --no-install-recommends openbox /tmp/microsoft-edge.deb; \
     #

.docker/opera/Dockerfile

@@ -9,7 +9,7 @@ ARG LIBFFMPEG_API_URL="https://api.github.com/repos/nwjs-ffmpeg-prebuilt/nwjs-ff
 RUN set -eux; apt-get update; \
     #
     # fetch latest release
-    VERSION="$(wget -O - "${API_URL}" 2>/dev/null | sed -n 's/.*href="\([^"/]*\).*/\1/p' | tail -1)"; \
+    VERSION="$(wget -O - "${API_URL}" 2>/dev/null | sed -n 's/.*href="\([^"/]*\).*/\1/p' | sort --version-sort | tail -1)"; \
     wget -O /tmp/opera.deb "${API_URL}${VERSION}/linux/opera-stable_${VERSION}_amd64.deb"; \
     apt-get install -y --no-install-recommends openbox jq unzip /tmp/opera.deb; \
     #

.docker/ungoogled-chromium/Dockerfile

@@ -21,7 +21,7 @@ RUN set -eux; apt-get update; \
     chmod 4755 /usr/lib/chromium/chrome-sandbox; \
     #
     # install widevine module
-    WIDEVINE_VERSION=$(wget --quiet -O - https://dl.google.com/widevine-cdm/versions.txt | tail -n 1); \
+    WIDEVINE_VERSION=$(wget --quiet -O - https://dl.google.com/widevine-cdm/versions.txt | sort --version-sort | tail -n 1); \
     wget -O /tmp/widevine.zip "https://dl.google.com/widevine-cdm/${WIDEVINE_VERSION}-linux-x64.zip"; \
     unzip -p /tmp/widevine.zip libwidevinecdm.so > /usr/lib/chromium/libwidevinecdm.so; \
     chmod 644 /usr/lib/chromium/libwidevinecdm.so; \

server/internal/http/http.go

@@ -166,7 +166,13 @@ func New(conf *config.Server, webSocketHandler types.WebSocketHandler, desktop t
 				return
 			}
 
-			r.ParseMultipartForm(32 << 20)
+			err = r.ParseMultipartForm(32 << 20)
+			if err != nil || r.MultipartForm == nil {
+				logger.Warn().Err(err).Msg("failed to parse multipart form")
+				http.Error(w, "error parsing form", http.StatusBadRequest)
+				return
+			}
+
 			for _, formheader := range r.MultipartForm.File["files"] {
 				filePath := webSocketHandler.FileTransferPath(formheader.Filename)
 
@@ -187,6 +193,11 @@ func New(conf *config.Server, webSocketHandler types.WebSocketHandler, desktop t
 
 				io.Copy(f, formfile)
 			}
+
+			err = r.MultipartForm.RemoveAll()
+			if err != nil {
+				logger.Warn().Err(err).Msg("failed to remove multipart form")
+			}
 		})
 	}