scheme_cgo.go RawHistoryFolder

1//go:build webkit_cgo
2
3package webkit
4
5/*
6#include <stdlib.h>
7*/
8import "C"
9
10import (
11    "unsafe"
12)
13
14// Resolver provides bytes and mime for a given custom URI.
15type SchemeResolver func(uri string) (mime string, data []byte, ok bool)
16
17var globalResolver SchemeResolver
18
19// SetURISchemeResolver sets the resolver used by the custom URI scheme handler.
20func SetURISchemeResolver(r SchemeResolver) { globalResolver = r }
21
22//export goResolveURIScheme
23func goResolveURIScheme(curi *C.char, outLen *C.size_t, outMime **C.char) unsafe.Pointer {
24    if curi == nil || outLen == nil || outMime == nil { return nil }
25    uri := C.GoString(curi)
26    if globalResolver == nil {
27        *outLen = 0
28        *outMime = nil
29        return nil
30    }
31    mime, data, ok := globalResolver(uri)
32    if !ok || len(data) == 0 {
33        *outLen = 0
34        *outMime = nil
35        return nil
36    }
37    buf := C.malloc(C.size_t(len(data)))
38    if buf == nil {
39        *outLen = 0
40        *outMime = nil
41        return nil
42    }
43    // Copy data into C buffer
44    dst := (*[1 << 30]byte)(buf)[:len(data):len(data)]
45    copy(dst, data)
46    *outLen = C.size_t(len(data))
47    *outMime = C.CString(mime)
48    return buf
49}
50