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sea: use JSON configuration and blob content for SEA
PR-URL: #47125 Refs: nodejs/single-executable#58 Reviewed-By: Darshan Sen <raisinten@gmail.com>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,80 @@ | ||
| #include "json_parser.h" | ||
| #include "node_errors.h" | ||
| #include "node_v8_platform-inl.h" | ||
| #include "util-inl.h" | ||
|
|
||
| namespace node { | ||
| using v8::ArrayBuffer; | ||
| using v8::Context; | ||
| using v8::Isolate; | ||
| using v8::Local; | ||
| using v8::Object; | ||
| using v8::String; | ||
| using v8::Value; | ||
|
|
||
| static Isolate* NewIsolate(v8::ArrayBuffer::Allocator* allocator) { | ||
| Isolate* isolate = Isolate::Allocate(); | ||
| CHECK_NOT_NULL(isolate); | ||
| per_process::v8_platform.Platform()->RegisterIsolate(isolate, | ||
| uv_default_loop()); | ||
| Isolate::CreateParams params; | ||
| params.array_buffer_allocator = allocator; | ||
| Isolate::Initialize(isolate, params); | ||
| return isolate; | ||
| } | ||
|
|
||
| void JSONParser::FreeIsolate(Isolate* isolate) { | ||
| per_process::v8_platform.Platform()->UnregisterIsolate(isolate); | ||
| isolate->Dispose(); | ||
| } | ||
|
|
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| JSONParser::JSONParser() | ||
| : allocator_(ArrayBuffer::Allocator::NewDefaultAllocator()), | ||
| isolate_(NewIsolate(allocator_.get())), | ||
| handle_scope_(isolate_.get()), | ||
| context_(isolate_.get(), Context::New(isolate_.get())), | ||
| context_scope_(context_.Get(isolate_.get())) {} | ||
|
|
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| bool JSONParser::Parse(const std::string& content) { | ||
| DCHECK(!parsed_); | ||
|
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| Isolate* isolate = isolate_.get(); | ||
| Local<Context> context = context_.Get(isolate); | ||
|
|
||
| // It's not a real script, so don't print the source line. | ||
| errors::PrinterTryCatch bootstrapCatch( | ||
| isolate, errors::PrinterTryCatch::kDontPrintSourceLine); | ||
| Local<Value> json_string_value; | ||
| Local<Value> result_value; | ||
| if (!ToV8Value(context, content).ToLocal(&json_string_value) || | ||
| !json_string_value->IsString() || | ||
| !v8::JSON::Parse(context, json_string_value.As<String>()) | ||
| .ToLocal(&result_value) || | ||
| !result_value->IsObject()) { | ||
| return false; | ||
| } | ||
| content_.Reset(isolate, result_value.As<Object>()); | ||
| parsed_ = true; | ||
| return true; | ||
| } | ||
|
|
||
| std::optional<std::string> JSONParser::GetTopLevelField( | ||
| const std::string& field) { | ||
| Isolate* isolate = isolate_.get(); | ||
| Local<Context> context = context_.Get(isolate); | ||
| Local<Object> content_object = content_.Get(isolate); | ||
| Local<Value> value; | ||
| // It's not a real script, so don't print the source line. | ||
| errors::PrinterTryCatch bootstrapCatch( | ||
| isolate, errors::PrinterTryCatch::kDontPrintSourceLine); | ||
| if (!content_object | ||
| ->Get(context, OneByteString(isolate, field.c_str(), field.length())) | ||
| .ToLocal(&value) || | ||
| !value->IsString()) { | ||
| return {}; | ||
| } | ||
| Utf8Value utf8_value(isolate, value); | ||
| return utf8_value.ToString(); | ||
| } | ||
|
|
||
| } // namespace node |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,39 @@ | ||
| #ifndef SRC_JSON_PARSER_H_ | ||
| #define SRC_JSON_PARSER_H_ | ||
|
|
||
| #if defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS | ||
|
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| #include <memory> | ||
| #include <optional> | ||
| #include <string> | ||
| #include "util.h" | ||
| #include "v8.h" | ||
|
|
||
| namespace node { | ||
| // This is intended to be used to get some top-level fields out of a JSON | ||
| // without having to spin up a full Node.js environment that unnecessarily | ||
| // complicates things. | ||
| class JSONParser { | ||
| public: | ||
| JSONParser(); | ||
| ~JSONParser() {} | ||
| bool Parse(const std::string& content); | ||
| std::optional<std::string> GetTopLevelField(const std::string& field); | ||
|
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| private: | ||
| // We might want a lighter-weight JSON parser for this use case. But for now | ||
| // using V8 is good enough. | ||
| static void FreeIsolate(v8::Isolate* isolate); | ||
| std::unique_ptr<v8::ArrayBuffer::Allocator> allocator_; | ||
| DeleteFnPtr<v8::Isolate, FreeIsolate> isolate_; | ||
| v8::HandleScope handle_scope_; | ||
| v8::Global<v8::Context> context_; | ||
| v8::Context::Scope context_scope_; | ||
| v8::Global<v8::Object> content_; | ||
| bool parsed_ = false; | ||
| }; | ||
| } // namespace node | ||
|
|
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| #endif // defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS | ||
|
|
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| #endif // SRC_JSON_PARSER_H_ |
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