I am really stupid. I forgot to return the value of the
function serverSendRequest.
Can i do this function void?
среда, 20 марта 2013 г., 0:38:37 UTC+4 пользователь Егор Яковлев написал:
>
> Can you help me, please. I dont know whats wrong with my programm. I can
> admit a trivial error with V8 api.
>
> I have some code, that send request into the server using "curlpp" library
> and write the answer in std::string "jsonString" variable. And this part
> of the program works.
>
> #include <v8.h>
>> #include <fstream>
>> #include <string>
>> #include <cerrno>
>> #include <string>
>> #include <sstream>
>> #include <iostream>
>> #include <curlpp/cURLpp.hpp>
>> #include <curlpp/Easy.hpp>
>> #include <curlpp/Options.hpp>
>> using namespace v8;
>> using namespace cURLpp;
>> using namespace Options;
>> using namespace types;
>> std::string get_file_contents(const char *filename)
>> {
>> ...
>> }
>> class Callback {
>> public:
>> static std::string jsonString;
>> private:
>> static size_t writer(char* ptr, size_t size, size_t nmemb);
>> public:
>> static Handle<Value> serverSendRequest(const Arguments&);
>> };
>> std::string Callback::jsonString;
>> size_t Callback::writer(char* ptr, size_t size, size_t nmemb)
>> {
>> size_t realsize = size * nmemb;
>> Callback::jsonString.append(ptr,realsize);
>> return realsize;
>> }
>>
>> Handle<Value> Callback::serverSendRequest(const Arguments& args)
>> {
>> Callback::jsonString = "";
>> std::string requestBody = "";
>> std::string requestType = "POST";
>> std::string url = "http://localhost";;
>> if (!args[0]->IsNull()){
>> ...
>> url = ... ;
>> }
>> if (!args[1]->IsNull()){
>> ...
>> requestType = ...;
>> }
>> if (!args[2]->IsNull())
>> {
>> ...
>> requestBody = ... ;
>> }
>> CURL *curl;
>> CURLcode res;
>> struct curl_slist *headers = NULL;
>> std::ostringstream oss;
>> curl_slist_append(headers, "Accept: application/json");
>> curl_slist_append(headers, "Content-Type: application/json");
>> curl_slist_append(headers, "charsets: utf-8");
>> curl = curl_easy_init();
>> if (curl)
>> {
>> if (requestType == "GET"){
>> curl_easy_setopt(curl, CURLOPT_HTTPGET,1);
>> url = url + "?" + requestBody;
>> }
>> else if (requestType == "POST") {
>> curl_easy_setopt( curl, CURLOPT_POST,1);
>> curl_easy_setopt( curl, CURLOPT_POSTFIELDSIZE,
>> requestBody.size());
>> curl_easy_setopt( curl, CURLOPT_POSTFIELDS,
>> requestBody.c_str());
>> }
>> curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);
>> curl_easy_setopt(curl, CURLOPT_URL, url.c_str());
>> curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, &Callback::writer);
>> curl_easy_perform(curl);
>>
>> //there is my right json string
>> printf("%s\n", Callback::jsonString.c_str());
>> }
>> }
>> int main(int argc, char* argv[]) {
>> std::string js_file = get_file_contents(argv[1]);
>> HandleScope handle_scope;
>> Handle<ObjectTemplate> global = ObjectTemplate::New();
>> global->Set(String::New("serverSendRequest"),
>> FunctionTemplate::New(Callback::serverSendRequest));
>> Persistent<Context> context = Context::New(NULL,global);
>>
>> Context::Scope context_scope(context);
>> Handle<String> source = String::New(js_file.c_str());
>> Handle<Script> script = Script::Compile(source);
>>
>> Handle<Value> result = script->Run();
>>
>> context.Dispose(context->GetIsolate());
>> return 0;
>> }
>
>
>
> But also i have a segmentation fault.
>
> I compile it on Ubuntu x64 (v8 - 2013-03-19: Version 3.17.13) with
> command:
>
> g++ -I./src programm.cpp -o programm
> out/x64.release/obj.target/tools/gyp/libv8_{base,snapshot}.a `curlpp-config
> --cflags` `curlpp-config --libs` -lpthread
>
>
> *The output of my programm:*
>
> {some json text}
>
> Program received signal SIGSEGV, Segmentation fault.
> 0x000000000043740f in
> v8::internal::Builtin_HandleApiCall(v8::internal::(anonymous
> namespace)::BuiltinArguments<(v8::internal::BuiltinExtraArguments)1>,
> v8::internal::Isolate*) ()
>
>
>
>
>
> Thanx for your attention.
>
>
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