Hi Jochen,
Full code of relevant file available - http://pastebin.com/fZJENvSi
<http://pastebin.com/fZJENvSi>
Snippet of relevant portions for WrapHTTPBodyMap:
Local<ObjectTemplate> HTTPBody::MakeHTTPBodyMapTemplate(
Isolate* isolate) {
EscapableHandleScope handle_scope(isolate);
Local<ObjectTemplate> result = ObjectTemplate::New(isolate);
result->SetInternalFieldCount(1);
result->SetHandler(NamedPropertyHandlerConfiguration(NULL,
HTTPBodySet));
return handle_scope.Escape(result);
}
Local<Object> HTTPBody::WrapHTTPBodyMap() {
EscapableHandleScope handle_scope(GetIsolate());
if (http_body_map_template_.IsEmpty()) {
Local<ObjectTemplate> raw_template = MakeHTTPBodyMapTemplate(GetIsolate());
http_body_map_template_.Reset(GetIsolate(), raw_template);
}
Local<ObjectTemplate> templ =
Local<ObjectTemplate>::New(GetIsolate(), http_body_map_template_);
Local<Object> result =
templ->NewInstance(GetIsolate()->GetCurrentContext()).ToLocalChecked();
Local<External> map_ptr = External::New(GetIsolate(), &http_body);
result->SetInternalField(0, map_ptr);
return handle_scope.Escape(result);
}
> On 27-Jul-2016, at 7:47 PM, Jochen Eisinger <[email protected]> wrote:
>
> Can you provide a complete example? I suspect that WrapHTTPBodyMap doesn't do
> what you expect it does
>
> On Tue, Jul 26, 2016 at 1:04 PM Abhishek Singh <[email protected]
> <mailto:[email protected]>> wrote:
> Would you mind guiding me a bit here? For now just trying to expose nested
> “body” map i.e. to allow something like “response.body.result = dbQueryResult"
>
> First is the Set interceptor for “response” (C++ object) and here I’m setting
> up “body” (C++ object for “body”) & setting return value to “body” object.
> Second one is Set interceptor for “body”
>
> void HTTPResponse::HTTPResponseSet(Local<Name> name, Local<Value> value_obj,
> const PropertyCallbackInfo<Value>& info) {
> if (name->IsSymbol()) return;
>
> V8Handle* w = UnwrapV8HandleInstance(info.Holder());
> HTTPBody* body = new HTTPBody(w);
>
> Local<Object> body_map = body->WrapHTTPBodyMap();
> info.GetReturnValue().Set(body_map);
> }
>
>
> void HTTPBody::HTTPBodySet(Local<Name> name, Local<Value> value_obj,
> const PropertyCallbackInfo<Value>& info) {
> if (name->IsSymbol()) return;
>
> string key = ObjectToString(Local<String>::Cast(name));
> string value = ToString(info.GetIsolate(), value_obj);
>
> map<string, string>* body = UnwrapMap(info.Holder());
> (*body)[key] = value;
>
> cout << "body field " << value << endl;
> }
>
>
> Currently I’m not hitting Set interceptor of “body” object, I suppose I’m
> doing something wrong here.
>
>
>> On 25-Jul-2016, at 10:00 PM, Jochen Eisinger <[email protected]
>> <mailto:[email protected]>> wrote:
>>
>
>> To create dynamic nested maps from C++, the outter object (response) would
>> have to return another intercepted object (e.g. body) that then returns the
>> actual values on access.
>>
>> On Fri, Jul 22, 2016 at 8:12 AM Abhishek Singh <[email protected]
>> <mailto:[email protected]>> wrote:
>> Hi,
>>
>> I’m wondering if there is a way to expose map<string, map<string, string> >
>> into JS world from C++? Exposing map<string, string> looks straightforward
>> and I’m doing for some C++ objects using NamedPropertyConfigurationHandler.
>> I’ll just show sample JS code that I would like to have and where C++
>> map<string, map<string, string> > will come into picture:
>>
>> function OnHTTPGet(request, response) {
>>
>> var city = “BLR”;
>> var limit = “10”;
>>
>> var queryResult = dbCal(“select * from users where city=${city}
>> limit ${limit}”);
>>
>> // This works for me presently
>> /* response.data = queryResult;
>> response.status_code = 200; */
>>
>> // What I would like to have
>> response.body.data = queryResult;
>> response.header.status_code = 200;
>> }
>>
>> “request” - native HTTP request JSON passed from C++ V8 binding as args to
>> JS function
>> “response” - C++ based HTTP object exposed with Setter callback set using
>> NamedPropertyConfigHandler and this what I write back to user who made the
>> “request"
>>
>> I basically want to set HTTP response body and header transparently, which
>> would require me to expose C++ HTTP object probably as a map<string,
>> map<string, string> >. Hope my question is clear, please let me know if
>> there a way to do this?
>>
>> Thanks,
>> Abhishek
>>
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