mirror of
https://github.com/lightpanda-io/browser.git
synced 2025-10-29 23:23:28 +00:00
dynamicImportCallback in JsContext
This commit is contained in:
Muki Kiboigo
@@ -196,203 +196,7 @@ pub fn Env(comptime State: type, comptime WebApis: type) type {
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errdefer isolate.deinit();
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// This is the callback that runs whenever a module is dynamically imported.
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isolate.setHostImportModuleDynamicallyCallback(struct {
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pub fn callback(
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v8_ctx: ?*const v8.c.Context,
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host_defined_options: ?*const v8.c.Data,
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resource_name: ?*const v8.c.Value,
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v8_specifier: ?*const v8.c.String,
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import_attrs: ?*const v8.c.FixedArray,
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) callconv(.c) ?*v8.c.Promise {
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_ = host_defined_options;
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_ = import_attrs;
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const ctx: v8.Context = .{ .handle = v8_ctx.? };
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const context: *JsContext = @ptrFromInt(ctx.getEmbedderData(1).castTo(v8.BigInt).getUint64());
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const iso = context.isolate;
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const resolver = v8.PromiseResolver.init(ctx);
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const specifier: v8.String = .{ .handle = v8_specifier.? };
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const specifier_str = jsStringToZig(context.call_arena, specifier, iso) catch {
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const error_msg = v8.String.initUtf8(iso, "Failed to parse module specifier");
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_ = resolver.reject(ctx, error_msg.toValue());
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return @constCast(resolver.getPromise().handle);
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};
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const resource: v8.String = .{ .handle = resource_name.? };
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const resource_str = jsStringToZig(context.call_arena, resource, iso) catch {
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const error_msg = v8.String.initUtf8(iso, "Failed to parse module resource");
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_ = resolver.reject(ctx, error_msg.toValue());
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return @constCast(resolver.getPromise().handle);
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};
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const referrer_full_url = blk: {
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// Search through module_identifier values to find matching resource
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var it = context.module_identifier.valueIterator();
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while (it.next()) |full_url| {
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// Extract just the filename from the full URL
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const last_slash = std.mem.lastIndexOfScalar(u8, full_url.*, '/') orelse 0;
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const filename = full_url.*[last_slash + 1 ..];
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// Compare with our resource string (removing ./ prefix if present)
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const resource_clean = if (std.mem.startsWith(u8, resource_str, "./"))
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resource_str[2..]
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else
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resource_str;
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if (std.mem.eql(u8, filename, resource_clean)) {
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break :blk full_url.*;
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}
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}
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// Fallback - maybe it's already a full URL in some cases?
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break :blk resource_str;
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};
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const normalized_specifier = @import("../url.zig").stitch(
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context.context_arena,
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specifier_str,
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referrer_full_url,
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.{ .alloc = .if_needed },
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) catch unreachable;
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// TODO: we need to resolve the full URL here and normalize it.
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// That way we can pass the correct one in the module_loader.
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log.info(.js, "dynamic import", .{
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.specifier = specifier_str,
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.resource = resource_str,
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.normalized = normalized_specifier,
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});
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const module_loader = context.module_loader;
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const source = module_loader.func(module_loader.ptr, normalized_specifier) catch {
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const error_msg = v8.String.initUtf8(iso, "Failed to load module");
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_ = resolver.reject(ctx, error_msg.toValue());
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return @constCast(resolver.getPromise().handle);
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} orelse {
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const error_msg = v8.String.initUtf8(iso, "Module source not available");
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_ = resolver.reject(ctx, error_msg.toValue());
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return @constCast(resolver.getPromise().handle);
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};
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var try_catch: TryCatch = undefined;
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try_catch.init(context);
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defer try_catch.deinit();
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const module = compileModule(iso, source, specifier_str) catch {
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log.err(.js, "module compilation failed", .{
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.specifier = specifier_str,
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.exception = try_catch.exception(context.call_arena) catch "unknown error",
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.stack = try_catch.stack(context.call_arena) catch null,
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});
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const error_msg = if (try_catch.hasCaught()) blk: {
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const exception_str = try_catch.exception(context.call_arena) catch "Compilation error";
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break :blk v8.String.initUtf8(iso, exception_str orelse "Compilation error");
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} else v8.String.initUtf8(iso, "Module compilation failed");
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_ = resolver.reject(ctx, error_msg.toValue());
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return @constCast(resolver.getPromise().handle);
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};
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context.module_identifier.putNoClobber(context.context_arena, module.getIdentityHash(), normalized_specifier) catch unreachable;
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context.module_cache.putNoClobber(context.context_arena, normalized_specifier, v8.Persistent(v8.Module).init(iso, module)) catch unreachable;
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const instantiated = module.instantiate(ctx, JsContext.resolveModuleCallback) catch {
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log.err(.js, "module instantiation failed", .{
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.specifier = specifier_str,
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.exception = try_catch.exception(context.call_arena) catch "unknown error",
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.stack = try_catch.stack(context.call_arena) catch null,
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});
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const error_msg = if (try_catch.hasCaught()) blk: {
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const exception_str = try_catch.exception(context.call_arena) catch "Instantiation error";
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break :blk v8.String.initUtf8(iso, exception_str orelse "Instantiation error");
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} else v8.String.initUtf8(iso, "Module instantiation failed");
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_ = resolver.reject(ctx, error_msg.toValue());
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return @constCast(resolver.getPromise().handle);
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};
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if (!instantiated) {
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const error_msg = v8.String.initUtf8(iso, "Module did not instantiate");
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_ = resolver.reject(ctx, error_msg.toValue());
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return @constCast(resolver.getPromise().handle);
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}
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const evaluated = module.evaluate(ctx) catch {
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log.err(.js, "module evaluation failed", .{
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.specifier = specifier_str,
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.exception = try_catch.exception(context.call_arena) catch "unknown error",
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.stack = try_catch.stack(context.call_arena) catch null,
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.line = try_catch.sourceLineNumber() orelse 0,
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});
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const error_msg = if (try_catch.hasCaught()) blk: {
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const exception_str = try_catch.exception(context.call_arena) catch "Evaluation error";
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break :blk v8.String.initUtf8(iso, exception_str orelse "Evaluation error");
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} else v8.String.initUtf8(iso, "Module evaluation failed");
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_ = resolver.reject(ctx, error_msg.toValue());
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return @constCast(resolver.getPromise().handle);
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};
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if (evaluated.isPromise()) {
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const promise = v8.Promise{ .handle = evaluated.handle };
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const EvaluationData = struct {
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module: v8.Persistent(v8.Module),
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resolver: v8.Persistent(v8.PromiseResolver),
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};
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const ev_data = context.context_arena.create(EvaluationData) catch unreachable;
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ev_data.* = .{
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.module = v8.Persistent(v8.Module).init(iso, module),
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.resolver = v8.Persistent(v8.PromiseResolver).init(iso, resolver),
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};
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const external = v8.External.init(iso, @ptrCast(ev_data));
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const then_callback = v8.Function.initWithData(ctx, struct {
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pub fn callback(info: ?*const v8.c.FunctionCallbackInfo) callconv(.c) void {
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const cb_info = v8.FunctionCallbackInfo{ .handle = info.? };
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const cb_isolate = cb_info.getIsolate();
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const cb_context = cb_isolate.getCurrentContext();
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const data: *EvaluationData = @ptrCast(@alignCast(cb_info.getExternalValue()));
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const cb_module = data.module.castToModule();
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const cb_resolver = data.resolver.castToPromiseResolver();
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const namespace = cb_module.getModuleNamespace();
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log.warn(.js, "module then promise", .{
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.namespace = namespace,
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});
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_ = cb_resolver.resolve(cb_context, namespace);
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}
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}.callback, external);
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const catch_callback = v8.Function.initWithData(ctx, struct {
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pub fn callback(info: ?*const v8.c.FunctionCallbackInfo) callconv(.c) void {
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log.warn(.js, "module catch promise", .{});
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const cb_info = v8.FunctionCallbackInfo{ .handle = info.? };
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const cb_context = cb_info.getIsolate().getCurrentContext();
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const data: *EvaluationData = @ptrCast(@alignCast(cb_info.getExternalValue()));
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const cb_resolver = data.resolver.castToPromiseResolver();
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_ = cb_resolver.reject(cb_context, cb_info.getData());
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}
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}.callback, external);
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_ = promise.thenAndCatch(ctx, then_callback, catch_callback) catch {
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log.err(.js, "module evaluation is promise", .{
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.specifier = specifier_str,
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.line = try_catch.sourceLineNumber() orelse 0,
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});
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const error_msg = v8.String.initUtf8(iso, "Evaluation is a promise");
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_ = resolver.reject(ctx, error_msg.toValue());
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return @constCast(resolver.getPromise().handle);
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};
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} else {
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const namespace = module.getModuleNamespace();
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_ = resolver.resolve(ctx, namespace);
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}
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return @constCast(resolver.getPromise().handle);
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}
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}.callback);
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isolate.setHostImportModuleDynamicallyCallback(JsContext.dynamicModuleCallback);
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isolate.enter();
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errdefer isolate.exit();
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@@ -1706,6 +1510,214 @@ pub fn Env(comptime State: type, comptime WebApis: type) type {
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type_index = prototype_index;
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}
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}
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pub fn dynamicModuleCallback(
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v8_ctx: ?*const v8.c.Context,
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host_defined_options: ?*const v8.c.Data,
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resource_name: ?*const v8.c.Value,
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v8_specifier: ?*const v8.c.String,
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import_attrs: ?*const v8.c.FixedArray,
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) callconv(.c) ?*v8.c.Promise {
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_ = host_defined_options;
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_ = import_attrs;
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const ctx: v8.Context = .{ .handle = v8_ctx.? };
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const context: *JsContext = @ptrFromInt(ctx.getEmbedderData(1).castTo(v8.BigInt).getUint64());
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const iso = context.isolate;
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const resolver = v8.PromiseResolver.init(context.v8_context);
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const specifier: v8.String = .{ .handle = v8_specifier.? };
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const specifier_str = jsStringToZig(context.call_arena, specifier, iso) catch {
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const error_msg = v8.String.initUtf8(iso, "Failed to parse module specifier");
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_ = resolver.reject(ctx, error_msg.toValue());
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return @constCast(resolver.getPromise().handle);
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};
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const resource: v8.String = .{ .handle = resource_name.? };
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const resource_str = jsStringToZig(context.call_arena, resource, iso) catch {
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const error_msg = v8.String.initUtf8(iso, "Failed to parse module resource");
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_ = resolver.reject(ctx, error_msg.toValue());
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return @constCast(resolver.getPromise().handle);
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};
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const referrer_full_url = blk: {
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var it = context.module_identifier.valueIterator();
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while (it.next()) |full_url| {
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const last_slash = std.mem.lastIndexOfScalar(u8, full_url.*, '/') orelse 0;
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const filename = full_url.*[last_slash + 1 ..];
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const resource_clean = if (std.mem.startsWith(u8, resource_str, "./"))
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resource_str[2..]
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else
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resource_str;
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if (std.mem.eql(u8, filename, resource_clean)) {
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break :blk full_url.*;
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}
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}
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break :blk resource_str;
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};
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const normalized_specifier = @import("../url.zig").stitch(
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context.context_arena,
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specifier_str,
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referrer_full_url,
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.{ .alloc = .if_needed },
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) catch unreachable;
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_dynamicModuleCallback(context, resource_str, normalized_specifier, &resolver);
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return @constCast(resolver.getPromise().handle);
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}
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fn _dynamicModuleCallback(
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context: *JsContext,
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resource: []const u8,
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specifier: []const u8,
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resolver: *const v8.PromiseResolver,
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) void {
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const iso = context.isolate;
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const ctx = context.v8_context;
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// Check module cache first.
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if (context.module_cache.get(specifier)) |cached_module| {
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const namespace = cached_module.castToModule().getModuleNamespace();
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_ = resolver.resolve(ctx, namespace);
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return;
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}
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log.info(.js, "dynamic import", .{
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.specifier = specifier,
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.resource = resource,
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.normalized = specifier,
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});
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const module_loader = context.module_loader;
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const source = module_loader.func(module_loader.ptr, specifier) catch {
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const error_msg = v8.String.initUtf8(iso, "Failed to load module");
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_ = resolver.reject(ctx, error_msg.toValue());
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return;
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} orelse {
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const error_msg = v8.String.initUtf8(iso, "Module source not available");
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_ = resolver.reject(ctx, error_msg.toValue());
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return;
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};
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var try_catch: TryCatch = undefined;
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try_catch.init(context);
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defer try_catch.deinit();
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const new_module = compileModule(iso, source, specifier) catch {
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log.err(.js, "module compilation failed", .{
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.specifier = specifier,
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.exception = try_catch.exception(context.call_arena) catch "unknown error",
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.stack = try_catch.stack(context.call_arena) catch null,
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});
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const error_msg = if (try_catch.hasCaught()) blk: {
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const exception_str = try_catch.exception(context.call_arena) catch "Compilation error";
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break :blk v8.String.initUtf8(iso, exception_str orelse "Compilation error");
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} else v8.String.initUtf8(iso, "Module compilation failed");
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_ = resolver.reject(ctx, error_msg.toValue());
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return;
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};
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// Insert into Module Cache.
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context.module_identifier.putNoClobber(context.context_arena, new_module.getIdentityHash(), specifier) catch unreachable;
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context.module_cache.putNoClobber(context.context_arena, specifier, v8.Persistent(v8.Module).init(iso, new_module)) catch unreachable;
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const instantiated = new_module.instantiate(ctx, JsContext.resolveModuleCallback) catch {
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log.err(.js, "module instantiation failed", .{
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.specifier = specifier,
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.exception = try_catch.exception(context.call_arena) catch "unknown error",
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.stack = try_catch.stack(context.call_arena) catch null,
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});
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const error_msg = if (try_catch.hasCaught()) blk: {
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const exception_str = try_catch.exception(context.call_arena) catch "Instantiation error";
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break :blk v8.String.initUtf8(iso, exception_str orelse "Instantiation error");
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} else v8.String.initUtf8(iso, "Module instantiation failed");
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_ = resolver.reject(ctx, error_msg.toValue());
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return;
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};
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if (!instantiated) {
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const error_msg = v8.String.initUtf8(iso, "Module did not instantiate");
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_ = resolver.reject(ctx, error_msg.toValue());
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return;
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}
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const evaluated = new_module.evaluate(ctx) catch {
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log.err(.js, "module evaluation failed", .{
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.specifier = specifier,
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.exception = try_catch.exception(context.call_arena) catch "unknown error",
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.stack = try_catch.stack(context.call_arena) catch null,
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.line = try_catch.sourceLineNumber() orelse 0,
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});
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const error_msg = if (try_catch.hasCaught()) blk: {
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const exception_str = try_catch.exception(context.call_arena) catch "Evaluation error";
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break :blk v8.String.initUtf8(iso, exception_str orelse "Evaluation error");
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} else v8.String.initUtf8(iso, "Module evaluation failed");
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_ = resolver.reject(ctx, error_msg.toValue());
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return;
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};
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if (evaluated.isPromise()) {
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const promise = v8.Promise{ .handle = evaluated.handle };
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const EvaluationData = struct {
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module: v8.Persistent(v8.Module),
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resolver: v8.Persistent(v8.PromiseResolver),
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};
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const ev_data = context.context_arena.create(EvaluationData) catch unreachable;
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ev_data.* = .{
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.module = v8.Persistent(v8.Module).init(iso, new_module),
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.resolver = v8.Persistent(v8.PromiseResolver).init(iso, resolver.*),
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};
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const external = v8.External.init(iso, @ptrCast(ev_data));
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const then_callback = v8.Function.initWithData(ctx, struct {
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pub fn callback(info: ?*const v8.c.FunctionCallbackInfo) callconv(.c) void {
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const cb_info = v8.FunctionCallbackInfo{ .handle = info.? };
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const cb_isolate = cb_info.getIsolate();
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const cb_context = cb_isolate.getCurrentContext();
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const data: *EvaluationData = @ptrCast(@alignCast(cb_info.getExternalValue()));
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const cb_module = data.module.castToModule();
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const cb_resolver = data.resolver.castToPromiseResolver();
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const namespace = cb_module.getModuleNamespace();
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log.warn(.js, "module then promise", .{
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.namespace = namespace,
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});
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_ = cb_resolver.resolve(cb_context, namespace);
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||||
}
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||||
}.callback, external);
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||||
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||||
const catch_callback = v8.Function.initWithData(ctx, struct {
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||||
pub fn callback(info: ?*const v8.c.FunctionCallbackInfo) callconv(.c) void {
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||||
log.warn(.js, "module catch promise", .{});
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const cb_info = v8.FunctionCallbackInfo{ .handle = info.? };
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const cb_context = cb_info.getIsolate().getCurrentContext();
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||||
const data: *EvaluationData = @ptrCast(@alignCast(cb_info.getExternalValue()));
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||||
const cb_resolver = data.resolver.castToPromiseResolver();
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||||
_ = cb_resolver.reject(cb_context, cb_info.getData());
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||||
}
|
||||
}.callback, external);
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||||
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||||
_ = promise.thenAndCatch(ctx, then_callback, catch_callback) catch {
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||||
log.err(.js, "module evaluation is promise", .{
|
||||
.specifier = specifier,
|
||||
.line = try_catch.sourceLineNumber() orelse 0,
|
||||
});
|
||||
const error_msg = v8.String.initUtf8(iso, "Evaluation is a promise");
|
||||
_ = resolver.reject(ctx, error_msg.toValue());
|
||||
return;
|
||||
};
|
||||
} else {
|
||||
const namespace = new_module.getModuleNamespace();
|
||||
_ = resolver.resolve(ctx, namespace);
|
||||
}
|
||||
}
|
||||
};
|
||||
|
||||
pub const Function = struct {
|
||||
|
||||
Reference in New Issue
Block a user