Casa_clnt.cpp

#include <cpprest/http_client.h>
#include <cpprest/json.h>

using namespace web;
using namespace web::http;
using namespace web::http::client;

#include <iostream>
using namespace std;

void display_field_map_json(json::value & jvalue)
{
    if (!jvalue.is_null())
    {
        for (auto const & e : jvalue.as_object())
        {
            wcout << e.first << L" : " << e.second.as_string() << endl;
        }
    }
}

pplx::task<http_response> make_task_request(http_client & client,
    method mtd,
    json::value const & jvalue)
{
    return (mtd == methods::GET || mtd == methods::HEAD) ?
        client.request(mtd, L"/restdemo") :
        client.request(mtd, L"/restdemo", jvalue);
}

void make_request(http_client & client, method mtd, json::value const & jvalue)
{
    make_task_request(client, mtd, jvalue)
        .then([](http_response response)
    {
        if (response.status_code() == status_codes::OK)
        {
            return response.extract_json();
        }
        return pplx::task_from_result(json::value());
    })
        .then([](pplx::task<json::value> previousTask)
    {
        try
        {
            display_field_map_json(previousTask.get());
        }
        catch (http_exception const & e)
        {
            wcout << e.what() << endl;
        }
    })
        .wait();
}

int main()
{
    http_client client(U("http://localhost"));

    std::vector<std::pair<utility::string_t, json::value>> putvalue;
    putvalue.push_back(make_pair(L"one", json::value(L"100")));
    putvalue.push_back(make_pair(L"two", json::value(L"200")));

    wcout << L"\nput values\n";
    make_request(client, methods::PUT, json::value::object(putvalue));

    auto getvalue = json::value::array();
    getvalue[0] = json::value(L"one");
    getvalue[1] = json::value(L"two");
    getvalue[2] = json::value(L"three");

    wcout << L"\nget values (POST)\n";
    make_request(client, methods::POST, getvalue);

    auto delvalue = json::value::array();
    delvalue[0] = json::value(L"one");

    wcout << L"\ndelete values\n";
    make_request(client, methods::DEL, delvalue);

    wcout << L"\nget values (POST)\n";
    make_request(client, methods::POST, getvalue);

    wcout << L"\nget values (GET)\n";
    make_request(client, methods::GET, json::value::null());

    return 0;
}