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Better separation between V8 and non-V8 filter code.
Better separation between Windows and Linux filter code.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,99 @@ | ||
| // Copyright (c) 2014-2018 Coin Sciences Ltd | ||
| // MultiChain code distributed under the GPLv3 license, see COPYING file. | ||
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| #include "v8/callbacks.h" | ||
| #include "v8/v8engine.h" | ||
| #include "v8/v8utils.h" | ||
| #include "v8/v8ubjson.h" | ||
| #include "v8/v8blob.h" | ||
| #include <cassert> | ||
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|
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| namespace mc_v8 | ||
| { | ||
| /** | ||
| * Call an RPC function from a V8 JS callback. | ||
| * | ||
| * Marshal the arguments and the return value between V8 and json_spirit using intermediate JSON strings. | ||
| * Optionally filter the result before returning it to JS. | ||
| * | ||
| * @param name The name of the RPC function. | ||
| * @param args The V8 arguments/return value. | ||
| */ | ||
| void CallRpcFunction(std::string name, const v8::FunctionCallbackInfo<v8::Value> &args) | ||
| { | ||
| v8::Isolate *isolate = args.GetIsolate(); | ||
| v8::Locker locker(isolate); | ||
| v8::Isolate::Scope isolateScope(isolate); | ||
| v8::HandleScope handleScope(isolate); | ||
| v8::Local<v8::Context> context(isolate->GetCurrentContext()); | ||
| v8::Context::Scope contextScope(context); | ||
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| IFilterCallback *filterCallback = static_cast<IFilterCallback *>(args.Data().As<v8::External>()->Value()); | ||
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| auto v8args = v8::Array::New(isolate, args.Length()); | ||
| for (int i = 0; i < args.Length(); ++i) | ||
| { | ||
| v8args->Set(static_cast<unsigned>(i), args[i]); | ||
| } | ||
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| BlobPtr argsBlob = Blob::Instance("args"); | ||
| BlobPtr resultBlob = Blob::Instance("result"); | ||
| V82Ubj(isolate, v8args, argsBlob); | ||
| unsigned char *result; | ||
| size_t resultSize; | ||
|
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| filterCallback->UbjCallback(name.c_str(), argsBlob->Data(), &result, &resultSize); | ||
| resultBlob->Set(result, resultSize); | ||
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| if (resultBlob->IsEmpty()) | ||
| { | ||
| args.GetReturnValue().SetUndefined(); | ||
| } | ||
| else | ||
| { | ||
| int err; | ||
| args.GetReturnValue().Set(Ubj2V8(isolate, resultBlob, &err)); | ||
| } | ||
|
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| if (result != nullptr) | ||
| { | ||
| delete [] result; | ||
| } | ||
| } | ||
|
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| // clang-format off | ||
| #define FILTER_FUNCTION(name) \ | ||
| void filter_##name(const v8::FunctionCallbackInfo<v8::Value> &args) \ | ||
| { \ | ||
| CallRpcFunction(#name, args); \ | ||
| } | ||
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| FILTER_FUNCTION(getfiltertxid) | ||
| FILTER_FUNCTION(getfiltertransaction) | ||
| FILTER_FUNCTION(getfilterstreamitem) | ||
| FILTER_FUNCTION(getfilterassetbalances) | ||
| FILTER_FUNCTION(setfilterparam) | ||
| FILTER_FUNCTION(getfiltertxinput) | ||
| FILTER_FUNCTION(getlastblockinfo) | ||
| FILTER_FUNCTION(getassetinfo) | ||
| FILTER_FUNCTION(getstreaminfo) | ||
| FILTER_FUNCTION(verifypermission) | ||
| FILTER_FUNCTION(verifymessage) | ||
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| #define FILTER_LOOKUP(name) { #name, filter_##name } | ||
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| std::map<std::string, v8::FunctionCallback> callbackLookup{ | ||
| FILTER_LOOKUP(getfiltertxid), | ||
| FILTER_LOOKUP(getfiltertransaction), | ||
| FILTER_LOOKUP(getfilterstreamitem), | ||
| FILTER_LOOKUP(getfilterassetbalances), | ||
| FILTER_LOOKUP(setfilterparam), | ||
| FILTER_LOOKUP(getfiltertxinput), | ||
| FILTER_LOOKUP(getlastblockinfo), | ||
| FILTER_LOOKUP(getassetinfo), | ||
| FILTER_LOOKUP(getstreaminfo), | ||
| FILTER_LOOKUP(verifypermission), | ||
| FILTER_LOOKUP(verifymessage) | ||
| }; | ||
| // clang-format on | ||
| } // namespace mc_v8 |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,64 @@ | ||
| #include "v8blob.h" | ||
| #include <cstring> | ||
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| namespace mc_v8 | ||
| { | ||
| BlobPtr Blob::Instance(std::string name) | ||
| { | ||
| auto it = m_instances.find(name); | ||
| if (it == m_instances.end()) | ||
| { | ||
| it = m_instances.insert(std::make_pair(name, std::make_shared<Blob>())).first; | ||
| } | ||
| return it->second; | ||
| } | ||
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| Blob::~Blob() | ||
| { | ||
| if (m_buffer != nullptr) | ||
| { | ||
| delete[] m_buffer; | ||
| } | ||
| } | ||
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| void Blob::Reset() | ||
| { | ||
| m_size = 0; | ||
| } | ||
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| void Blob::Set(void *data, size_t size) | ||
| { | ||
| this->Reset(); | ||
| this->Append(data, size); | ||
| } | ||
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| void Blob::Append(void *data, size_t size) | ||
| { | ||
| this->Resize(size); | ||
| std::memcpy(m_buffer + m_size, data, size); | ||
| m_size += size; | ||
| } | ||
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| void Blob::Remove(std::string name) | ||
| { | ||
| m_instances.equal_range(name); | ||
| } | ||
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| void Blob::Resize(size_t add_size) | ||
| { | ||
| if (m_size + add_size > m_allocated) | ||
| { | ||
| size_t new_size = ((m_size + add_size - 1) / size_increment + 1) * size_increment; | ||
| auto new_buffer = new unsigned char[new_size]; | ||
| if (m_allocated > 0) | ||
| { | ||
| std::memcpy(new_buffer, m_buffer, m_allocated); | ||
| delete[] m_buffer; | ||
| } | ||
| m_buffer = new_buffer; | ||
| m_allocated = new_size; | ||
| } | ||
| } | ||
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| std::map<std::string, BlobPtr> Blob::m_instances; | ||
| } // namespace mc_v8 |
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