belle
/
example
/
client
/
https
/
src
/
main.cc
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178// belle client https example
#include "belle.hh"
namespace Belle = OB::Belle;
#include <string>
#include <iostream>
// prototypes
void on_http_error(Belle::Client& app);
void http_get();
void http_post();
void on_http_error(Belle::Client& app)
{
// set the http on error callback
app.on_http_error([](auto& ctx)
{
std::cerr << "Error: " << ctx.ec.message() << "\n\n";
});
}
void http_get()
{
// init client with remote address, port, and ssl enabled
Belle::Client app {"127.0.0.1", 8080, true};
on_http_error(app);
// http get request to path '/'
app.on_http("/", [](auto& ctx)
{
// check http status code
if (ctx.res.result() != Belle::Status::ok)
{
// print the response status code and reason
std::cerr
<< "Error: " << ctx.res.result_int()
<< " " << ctx.res.reason() << "\n\n";
return;
}
// print the response headers and body
std::cerr << ctx.res.base() << ctx.res.body() << "\n\n";
});
// http get request to path '/method'
app.on_http("/method", [](auto& ctx)
{
// check http status code
if (ctx.res.result() != Belle::Status::ok)
{
// print the response status code and reason
std::cerr
<< "Error: " << ctx.res.result_int()
<< " " << ctx.res.reason() << "\n\n";
return;
}
// print the response headers and body
std::cerr << ctx.res.base() << ctx.res.body() << "\n\n";
});
// init an http request object
Belle::Request req;
// set the target path
req.target("/regex/hello");
// set the method
req.method(Belle::Method::get);
// copy the request object
app.on_http(req, [](auto& ctx)
{
// check http status code
if (ctx.res.result() != Belle::Status::ok)
{
// print the response status code and reason
std::cerr
<< "Error: " << ctx.res.result_int()
<< " " << ctx.res.reason() << "\n\n";
return;
}
// print the full response
std::cerr << ctx.res << "\n\n";
});
// set the target path
req.target("/params");
// set the query parameters
req.params().emplace("pi", "π");
req.params().emplace("page", "2");
req.params().emplace("user", "François");
req.params().emplace("q", "Hello,\nBelle!");
req.params().emplace("q", "t#st spec!&l ch@r*ct=rs");
// move the request object with Request::move
app.on_http(req.move(), [](auto& ctx)
{
// check http status code
if (ctx.res.result() != Belle::Status::ok)
{
// print the response status code and reason
std::cerr
<< "Error: " << ctx.res.result_int()
<< " " << ctx.res.reason() << "\n\n";
return;
}
// print the full response
std::cerr << ctx.res << "\n\n";
});
// save the number of requests in the queue
auto total = app.queue().size();
// start the client and save the number of completed requests
auto completed = app.connect();
// print the number of completed requests
std::cerr << "connect: " << completed << "/" << total << "\n\n";
}
void http_post()
{
// init client with remote address, port, and ssl enabled
Belle::Client app {"127.0.0.1", 8080, true};
on_http_error(app);
// set http headers
Belle::Headers headers;
headers.set(Belle::Header::user_agent, "Belle");
headers.set(Belle::Header::content_type, "text/plain");
// request parameters and response handler
app.on_http(Belle::Method::post, "/post", headers, "Hello, Belle!", [](auto& ctx)
{
// check http status code
if (ctx.res.result() != Belle::Status::ok)
{
// print the response status code and reason
std::cerr
<< "Error: " << ctx.res.result_int()
<< " " << ctx.res.reason() << "\n\n";
return;
}
// print the response body
std::cerr << ctx.res.body() << "\n\n";
});
// save the number of requests in the queue
auto total = app.queue().size();
// start the client and save the number of completed requests
auto completed = app.connect();
// print the number of completed requests
std::cerr << "connect: " << completed << "/" << total << "\n\n";
}
int main(int argc, char *argv[])
{
// perform multiple http get requests to a single remote endpoint
http_get();
// perform an http post request to a single remote endpoint
http_post();
return 0;
}