mastodonpp/examples/example08_obtain_token.cpp
tastytea 161554e677
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Allow examples to build outside mastodonpp.
2020-01-18 23:51:34 +01:00

116 lines
3.3 KiB
C++

/* This file is part of mastodonpp.
* Copyright © 2020 tastytea <tastytea@tastytea.de>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
// Obtain an access token and verify that it works.
#if __has_include("mastodonpp.hpp")
# include "mastodonpp.hpp" // We're building mastodonpp.
#else
# include <mastodonpp/mastodonpp.hpp> // We're building outside mastodonpp.
#endif
#include <cstdlib>
#include <iostream>
#include <string>
#include <string_view>
#include <vector>
namespace masto = mastodonpp;
using std::exit;
using std::cout;
using std::cerr;
using std::endl;
using std::cin;
using std::string;
using std::to_string;
using std::string_view;
using std::vector;
void handle_error(const masto::answer_type &answer);
int main(int argc, char *argv[])
{
const vector<string_view> args(argv, argv + argc);
if (args.size() <= 1)
{
cerr << "Usage: " << args[0] << " <instance hostname>\n";
return 1;
}
try
{
// Initialize Instance and Instance::ObtainToken.
masto::Instance instance{args[1], {}};
masto::Instance::ObtainToken token{instance};
// Create an “Application” (/api/v1/apps),
// and get URI for the authorization code (/oauth/authorize).
auto answer{token.step_1("Testclient", "read:blocks read:mutes",
"https://example.com/")};
if (!answer)
{
handle_error(answer);
}
cout << "Please visit " << answer << "\nand paste the code here: ";
string code;
cin >> code;
// Obtain the token (/oauth/token).
answer = token.step_2(code);
if (!answer)
{
handle_error(answer);
}
cout << "Your access token is: " << answer << endl;
// Test if the token works.
masto::Connection connection{instance};
answer = connection.get(masto::API::v1::apps_verify_credentials);
if (!answer)
{
handle_error(answer);
}
cout << answer << endl;
}
catch (const masto::CURLException &e)
{
// Only libcurl errors that are not network errors will be thrown.
// There went probably something wrong with the initialization.
cerr << e.what() << endl;
}
return 0;
}
void handle_error(const masto::answer_type &answer)
{
if (answer.curl_error_code == 0)
{
// If it is no libcurl error, it must be an HTTP error.
cerr << "HTTP status: " << answer.http_status << endl;
}
else
{
// Network errors like “Couldn't resolve host.”.
cerr << "libcurl error " << to_string(answer.curl_error_code)
<< ": " << answer.error_message << endl;
}
exit(1);
}