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Loadable: Add registerCustomProtocol() for e.g. reading assets in mobile.

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This commit is contained in:
Alberto Torres 2024-11-29 13:30:32 +01:00
parent 6794b35978
commit 6212b816f0
1 changed files with 20 additions and 0 deletions
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20
libs/loadable/loadable.nim
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@ -44,6 +44,7 @@
{.hint[ConvFromXtoItselfNotNeeded]:off.} {.hint[ConvFromXtoItselfNotNeeded]:off.}
import std/tables
import arr_ref # for SliceMem import arr_ref # for SliceMem
type LoadableResourceStatus* = enum type LoadableResourceStatus* = enum
@ -236,6 +237,15 @@ func escapeUTF8*(s: string): string =
# TODO: automatically disable threads when not in main thread # TODO: automatically disable threads when not in main thread
type ProtocolHandler* = proc(uri: string): proc(self: LoadableResource)
var custom_protocol_handlers: Table[string, ProtocolHandler]
proc registerCustomProtocol*(prefix: string, handler: ProtocolHandler) =
## Registers a handler for a custom protocol. The function will be run for
## each uri that is requested, and will return a start_func, which in turn
## will call self.onload()
custom_protocol_handlers[prefix] = handler
proc loadUri*( proc loadUri*(
uri: string, uri: string,
onload_func: proc(ok: bool, err: string, data: SliceMem[byte]) = nil, onload_func: proc(ok: bool, err: string, data: SliceMem[byte]) = nil,
@ -246,6 +256,15 @@ proc loadUri*(
echo "fetching ", uri echo "fetching ", uri
for k,v in custom_protocol_handlers:
if uri.startswith k:
proc str(): string = uri
var self = newLoadableResource[Fetch](v(uri), str, false)
self.onload_func = onload_func
if auto_start:
start(self)
return self
var start_func: proc(self: LoadableResource) var start_func: proc(self: LoadableResource)
var self: Fetch var self: Fetch
var uri = uri var uri = uri
@ -318,3 +337,4 @@ proc loadUri*(
if auto_start: if auto_start:
start(self) start(self)
return self return self