export FetchResource from Go

client/go/outline/electron/cstring.go

@@ -0,0 +1,26 @@
+// Copyright 2024 The Outline Authors
+//
+// 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 main
+
+/*
+#include <stdlib.h>
+*/
+import "C"
+import "unsafe"
+
+//export FreeString
+func FreeString(str *C.char) {
+	C.free(unsafe.Pointer(str))
+}

client/go/outline/electron/fetch.go

@@ -0,0 +1,36 @@
+// Copyright 2024 The Outline Authors
+//
+// 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 main
+
+/*
+#include "platerr.h"
+
+struct FetchResourceResult {
+	const char *Content;
+	PlatformErrorHandle Error;
+};
+*/
+import "C"
+import "github.com/Jigsaw-Code/outline-apps/client/go/outline"
+
+//export FetchResource
+func FetchResource(cstr *C.char) C.struct_FetchResourceResult {
+	url := C.GoString(cstr)
+	result := outline.FetchResource(url)
+	return C.struct_FetchResourceResult{
+		Content: C.CString(result.Content),
+		Error:   ToCPlatformErrorHandle(result.Error),
+	}
+}

client/go/outline/electron/handle.go

@@ -0,0 +1,33 @@
+// Copyright 2024 The Outline Authors
+//
+// 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 main
+
+/*
+#include <stdint.h>
+*/
+import "C"
+import (
+	"runtime/cgo"
+)
+
+const NilHandle = 0
+
+//export FreeHandle
+func FreeHandle(ptr C.uintptr_t) {
+	if ptr != NilHandle {
+		h := cgo.Handle(ptr)
+		h.Delete()
+	}
+}

client/go/outline/electron/platerr.go

@@ -0,0 +1,40 @@
+// Copyright 2024 The Outline Authors
+//
+// 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 main
+
+/*
+#include "platerr.h"
+*/
+import "C"
+import (
+	"runtime/cgo"
+
+	"github.com/Jigsaw-Code/outline-apps/client/go/outline/platerrors"
+)
+
+func ToCPlatformErrorHandle(err *platerrors.PlatformError) C.PlatformErrorHandle {
+	if err == nil {
+		return NilHandle
+	}
+	return C.PlatformErrorHandle(cgo.NewHandle(err))
+}
+
+func FromCPlatformErrorHandle(err C.PlatformErrorHandle) *platerrors.PlatformError {
+	if err == NilHandle {
+		return nil
+	}
+	h := cgo.Handle(err)
+	return h.Value().(*platerrors.PlatformError)
+}

client/go/outline/electron/platerr.h

@@ -0,0 +1,17 @@
+// Copyright 2024 The Outline Authors
+//
+// 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.
+
+#include <stdint.h>
+
+typedef uintptr_t PlatformErrorHandle;