Add nlohmann-json example.
continuous-integration/drone/push Build is passing
Details
continuous-integration/drone/push Build is passing
Details
This commit is contained in:
parent
f0b38dae10
commit
65ff76312b
|
@ -0,0 +1,145 @@
|
||||||
|
/* 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.
|
||||||
|
*/
|
||||||
|
|
||||||
|
// Get the last 4 public statuses of an instance and process them with
|
||||||
|
// nlohmann-json. <https://github.com/nlohmann/json>
|
||||||
|
|
||||||
|
#if __has_include("mastodonpp.hpp")
|
||||||
|
# include "mastodonpp.hpp" // We're building mastodonpp.
|
||||||
|
#else
|
||||||
|
# include <mastodonpp/mastodonpp.hpp> // We're building outside mastodonpp.
|
||||||
|
#endif
|
||||||
|
|
||||||
|
// Don't compile if nlohmann-json can't be found.
|
||||||
|
#if __has_include(<nlohmann/json.hpp>)
|
||||||
|
# include <nlohmann/json.hpp>
|
||||||
|
|
||||||
|
#include <cstdlib>
|
||||||
|
#include <iostream>
|
||||||
|
#include <string>
|
||||||
|
#include <string_view>
|
||||||
|
#include <vector>
|
||||||
|
|
||||||
|
namespace masto = mastodonpp;
|
||||||
|
using json = nlohmann::json;
|
||||||
|
using std::exit;
|
||||||
|
using std::cout;
|
||||||
|
using std::cerr;
|
||||||
|
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 Connection.
|
||||||
|
masto::Instance instance{args[1], {}};
|
||||||
|
masto::Connection connection{instance};
|
||||||
|
|
||||||
|
// Get the last 4 public statuses of the instance.
|
||||||
|
auto answer{connection.get(masto::API::v1::timelines_public,
|
||||||
|
{
|
||||||
|
{"limit", "4"},
|
||||||
|
{"local", "true"}
|
||||||
|
})};
|
||||||
|
if (answer)
|
||||||
|
{
|
||||||
|
// Parse JSON string.
|
||||||
|
auto statuses{json::parse(answer.body)};
|
||||||
|
for (const auto &status : statuses)
|
||||||
|
{
|
||||||
|
// Extract the info we want and print it.
|
||||||
|
const auto acct{status["account"]["acct"].get<string_view>()};
|
||||||
|
const auto content{status["content"].get<string_view>()};
|
||||||
|
const auto id{status["id"].get<string_view>()};
|
||||||
|
cout << acct << " wrote status " << id << ": \n";
|
||||||
|
cout << " " << content.substr(0, 76) << " …\n";
|
||||||
|
|
||||||
|
// Print tags if there are any.
|
||||||
|
const auto tags{status["tags"]};
|
||||||
|
if (!tags.empty())
|
||||||
|
{
|
||||||
|
cout << " Tags: ";
|
||||||
|
for (const auto &tag : tags)
|
||||||
|
{
|
||||||
|
cout << '#' << tag["name"].get<string_view>() << " ";
|
||||||
|
}
|
||||||
|
cout << '\n';
|
||||||
|
}
|
||||||
|
|
||||||
|
// Print the number of attachments.
|
||||||
|
const auto n_attachments{status["media_attachments"].size()};
|
||||||
|
if (n_attachments > 0)
|
||||||
|
{
|
||||||
|
cout << " " << n_attachments << " attachment";
|
||||||
|
if (n_attachments > 1)
|
||||||
|
{
|
||||||
|
cout << "s";
|
||||||
|
}
|
||||||
|
cout << ".\n";
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
else
|
||||||
|
{
|
||||||
|
handle_error(answer);
|
||||||
|
}
|
||||||
|
|
||||||
|
}
|
||||||
|
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() << '\n';
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
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 << '\n';
|
||||||
|
}
|
||||||
|
else
|
||||||
|
{
|
||||||
|
// Network errors like “Couldn't resolve host.”.
|
||||||
|
cerr << "libcurl error " << to_string(answer.curl_error_code)
|
||||||
|
<< ": " << answer.error_message << '\n';
|
||||||
|
}
|
||||||
|
|
||||||
|
exit(1);
|
||||||
|
}
|
||||||
|
|
||||||
|
#else
|
||||||
|
|
||||||
|
#include <iostream>
|
||||||
|
int main()
|
||||||
|
{
|
||||||
|
std::cout << "Example could not be compiled "
|
||||||
|
"because nlohmann-json was not found.\n";
|
||||||
|
}
|
||||||
|
|
||||||
|
#endif // __has_include(<nlohmann/json.hpp>)
|
|
@ -106,6 +106,7 @@
|
||||||
* @example example06_update_name.cpp
|
* @example example06_update_name.cpp
|
||||||
* @example example07_delete_status.cpp
|
* @example example07_delete_status.cpp
|
||||||
* @example example08_obtain_token.cpp
|
* @example example08_obtain_token.cpp
|
||||||
|
* @example example09_nlohmann_json.cpp
|
||||||
*/
|
*/
|
||||||
|
|
||||||
/*!
|
/*!
|
||||||
|
|
Loading…
Reference in New Issue