tastytea/mastodonpp
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Merge branch 'develop' into main

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tastytea 2020-01-12 17:41:36 +01:00
commit c049af3212
Signed by: tastytea
GPG Key ID: CFC39497F1B26E07
11 changed files with 475 additions and 151 deletions
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2
examples/example06_update_name.cpp
View File

@ -51,7 +51,7 @@ int main(int argc, char *argv[])
const auto answer{connection.patch(
masto::API::v1::accounts_update_credentials,
{
{"display_name", name},
{"display_name", name}
})};
if (answer)
{

111
examples/example08_obtain_token.cpp Normal file
View File

@ -0,0 +1,111 @@
/* 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.
#include "mastodonpp.hpp"
#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://tastytea.de/")};
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);
}

5
include/answer.hpp
View File

@ -18,6 +18,7 @@
#define MASTODONPP_ANSWER_HPP
#include <cstdint>
#include <ostream>
#include <string>
#include <string_view>
@ -26,6 +27,7 @@ namespace mastodonpp
using std::uint8_t;
using std::uint16_t;
using std::ostream;
using std::string;
using std::string_view;
@ -97,8 +99,7 @@ struct answer_type
*
* @since 0.1.0
*/
friend std::ostream &operator <<(std::ostream &out,
const answer_type &answer);
friend ostream &operator <<(ostream &out, const answer_type &answer);
/*!
* @brief Returns the value of a header field.

7
include/connection.hpp
View File

@ -82,7 +82,12 @@ public:
*
* @since 0.1.0
*/
explicit Connection(Instance &instance);
explicit Connection(Instance &instance)
: _instance{instance}
, _baseuri{instance.get_baseuri()}
{
_instance.copy_connection_properties(*this);
}
/*!
* @brief Make a HTTP GET call with parameters.

44
include/curl_wrapper.hpp
View File

@ -145,18 +145,6 @@ public:
return _connection;
}
/*!
* @brief Set the proxy to use.
*
* See [CURLOPT_PROXY(3)]
* (https://curl.haxx.se/libcurl/c/CURLOPT_PROXY.html).
*
* @param proxy Examples: "socks4a://127.0.0.1:9050", "http://[::1]:3128".
*
* @since 0.1.0
*/
void set_proxy(string_view proxy);
/*!
* @brief URL encodes the given string.
*
@ -169,6 +157,7 @@ public:
*
* @since 0.3.0
*/
[[nodiscard]]
inline string escape_url(const string_view url) const
{
char *cbuf{curl_easy_escape(_connection, url.data(),
@ -190,6 +179,7 @@ public:
*
* @since 0.3.0
*/
[[nodiscard]]
inline string unescape_url(const string_view url) const
{
char *cbuf{curl_easy_unescape(_connection, url.data(),
@ -199,6 +189,18 @@ public:
return sbuf;
}
/*!
* @brief Set some properties of the connection.
*
* Meant for internal use. See Instance::copy_connection_properties().
*
* @since 0.3.0
*/
void setup_connection_properties(string_view proxy,
string_view access_token,
string_view cainfo,
string_view useragent);
protected:
/*!
* @brief Mutex for #get_buffer a.k.a. _curl_buffer_body.
@ -248,6 +250,18 @@ protected:
_stream_cancelled = true;
}
/*!
* @brief Set the proxy to use.
*
* See [CURLOPT_PROXY(3)]
* (https://curl.haxx.se/libcurl/c/CURLOPT_PROXY.html).
*
* @param proxy Examples: "socks4a://127.0.0.1:9050", "http://[::1]:3128".
*
* @since 0.1.0
*/
void set_proxy(string_view proxy);
/*!
* @brief Set OAuth 2.0 Bearer Access Token.
*
@ -259,10 +273,12 @@ protected:
/*!
* @brief Set path to Certificate Authority (CA) bundle.
*
* @since 0.2.1
* @since 0.3.0
*/
void set_cainfo(string_view path);
void set_useragent(string_view useragent);
private:
CURL *_connection;
char _curl_buffer_error[CURL_ERROR_SIZE];
@ -356,7 +372,7 @@ private:
* @param data Data of the field. If it begins with <tt>`\@file:<tt>, the
* rest of the ergument is treated as a filename.
*
* @since 0.1.1
* @since 0.2.0
*/
void add_mime_part(curl_mime *mime,
string_view name, string_view data) const;

145
include/instance.hpp
View File

@ -53,7 +53,29 @@ public:
*
* @since 0.1.0
*/
explicit Instance(string_view hostname, string_view access_token);
explicit Instance(const string_view hostname,
const string_view access_token)
: _hostname{hostname}
, _baseuri{"https://" + _hostname}
, _access_token{access_token}
, _max_chars{0}
{}
/*!
* @brief Set the properties of the connection of the calling class up.
*
* Meant for internal use. This aligns the properties of the connection of
* the calling class with the properties of connection of this class.
*
* @param curlwrapper The CURLWrapper parent of the calling class.
*
* @since 0.3.0
*/
inline void copy_connection_properties(CURLWrapper &curlwrapper)
{
curlwrapper.setup_connection_properties(_proxy, _access_token, _cainfo,
_useragent);
}
/*!
* @brief Returns the hostname.
@ -61,7 +83,7 @@ public:
* @since 0.1.0
*/
[[nodiscard]]
inline string_view get_hostname() const
inline string_view get_hostname() const noexcept
{
return _hostname;
}
@ -74,7 +96,7 @@ public:
* @since 0.1.0
*/
[[nodiscard]]
inline string_view get_baseuri() const
inline string_view get_baseuri() const noexcept
{
return _baseuri;
}
@ -85,7 +107,7 @@ public:
* @since 0.1.0
*/
[[nodiscard]]
inline string_view get_access_token() const
inline string_view get_access_token() const noexcept
{
return _access_token;
}
@ -115,7 +137,7 @@ public:
* @since 0.1.0
*/
[[nodiscard]]
uint64_t get_max_chars();
uint64_t get_max_chars() noexcept;
/*! @copydoc CURLWrapper::set_proxy(string_view)
*
@ -128,19 +150,6 @@ public:
CURLWrapper::set_proxy(proxy);
}
/*!
* @brief Returns the proxy string that was previously set.
*
* Does not return the proxy if it was set from an environment variable.
*
* @since 0.1.0
*/
[[nodiscard]]
string_view get_proxy() const
{
return _proxy;
}
/*!
* @brief Returns the NodeInfo of the instance.
*
@ -164,7 +173,7 @@ public:
*
* @since 0.3.0
*/
vector<string> get_post_formats();
vector<string> get_post_formats() noexcept;
/*!
* @brief Set path to Certificate Authority (CA) bundle.
@ -172,7 +181,7 @@ public:
* Sets also the CA info for all Connection%s that are initialized with
* this Instance afterwards.
*
* @since 0.2.1
* @since 0.3.0
*/
void set_cainfo(string_view path)
{
@ -180,18 +189,95 @@ public:
CURLWrapper::set_cainfo(path);
}
/*!
* @brief Returns the cainfo path that was previously set.
*
* This is used when initializing a Connection.
*
* @since 0.2.1
*/
string_view get_cainfo()
void set_useragent(const string_view useragent)
{
return _cainfo;
_useragent = useragent;
CURLWrapper::set_useragent(useragent);
}
/*!
* @brief Simplifies obtaining an OAuth 2.0 Bearer Access Token.
*
* * Create an Instance() and initialize this class with it.
* * Call step_1() to get the URI your user has to visit.
* * Get the authorization code from your user.
* * Call step_2() with the code.
*
* Example:
* @code
* mastodonpp::Instance instance("example.com", {});
* mastodonpp::Instance::ObtainToken token(instance);
* auto answer{token.step1("Good program", "read:blocks read:mutes", "")};
* if (answer)
* {
* std::cout << "Please visit " << answer << "\nand paste the code: ";
* std::string code;
* std::cin >> code;
* answer = access_token{token.step2(code)};
* if (answer)
* {
* std::cout << "Success!\n";
* }
* }
* @endcode
*
* @since 0.3.0
*/
class ObtainToken : public CURLWrapper
{
public:
ObtainToken(Instance &instance)
: _instance{instance}
, _baseuri{instance.get_baseuri()}
{
_instance.copy_connection_properties(*this);
}
/*!
* @brief Creates an application via `/api/v1/apps`.
*
* The `body` of the returned @link answer_type answer @endlink
* contains only the URI, not the whole JSON response.
*
* @param client_name The name of your application.
* @param scopes Space separated list of scopes. Defaults to
* “read” if empty.
* @param website The URI to the homepage of your application. Can
* be an empty string.
*
* @return The URI your user has to visit.
*
* @since 0.3.0
*/
[[nodiscard]]
answer_type step_1(string_view client_name, string_view scopes,
string_view website);
/*!
* @brief Creates a token via `/oauth/token`.
*
* The `body` of the returned @link answer_type answer @endlink
* contains only the access token, not the whole JSON response.
*
* The access token will be set in the parent Instance.
*
* @param code The authorization code you got from the user.
*
* @return The access token.
*
* @since 0.3.0
*/
[[nodiscard]]
answer_type step_2(string_view code);
private:
Instance &_instance;
const string _baseuri;
string _scopes;
string _client_id;
string _client_secret;
};
private:
const string _hostname;
const string _baseuri;
@ -200,6 +286,7 @@ private:
string _proxy;
vector<string> _post_formats;
string _cainfo;
string _useragent;
};
} // namespace mastodonpp

1
include/mastodonpp.hpp
View File

@ -105,6 +105,7 @@
* @example example05_update_notification_settings.cpp
* @example example06_update_name.cpp
* @example example07_delete_status.cpp
* @example example08_obtain_token.cpp
*/
/*!

2
src/api.cpp
View File

@ -28,7 +28,7 @@ API::API(const endpoint_type &endpoint)
const map<API::endpoint_type,string_view> API::_endpoint_map
{
{v1::apps, "/api/v1/apps"},
{v1::apps_verify_credentials, "/api/v1/apps/verify/credentials"},
{v1::apps_verify_credentials, "/api/v1/apps/verify_credentials"},
{v1::accounts, "/api/v1/accounts"},
{v1::accounts_verify_credentials, "/api/v1/accounts/verify_credentials"},

20
src/connection.cpp
View File

@ -21,26 +21,6 @@ namespace mastodonpp
using std::holds_alternative;
Connection::Connection(Instance &instance)
: _instance{instance}
, _baseuri{instance.get_baseuri()}
{
auto proxy{_instance.get_proxy()};
if (!proxy.empty())
{
CURLWrapper::set_proxy(proxy);
}
if (!_instance.get_access_token().empty())
{
CURLWrapper::set_access_token(_instance.get_access_token());
}
if (!_instance.get_cainfo().empty())
{
CURLWrapper::set_cainfo(_instance.get_cainfo());
}
}
string Connection::endpoint_to_uri(const endpoint_variant &endpoint) const
{
if (holds_alternative<API::endpoint_type>(endpoint))

72
src/curl_wrapper.cpp
View File

@ -64,16 +64,6 @@ CURLWrapper::~CURLWrapper() noexcept
}
}
void CURLWrapper::set_proxy(const string_view proxy)
{
// NOLINTNEXTLINE(cppcoreguidelines-pro-type-vararg)
CURLcode code{curl_easy_setopt(_connection, CURLOPT_PROXY, proxy.data())};
if (code != CURLE_OK)
{
throw CURLException{code, "Failed to set proxy", _curl_buffer_error};
}
}
answer_type CURLWrapper::make_request(const http_method &method, string uri,
const parametermap &parameters)
{
@ -197,6 +187,42 @@ answer_type CURLWrapper::make_request(const http_method &method, string uri,
return answer;
}
void CURLWrapper::setup_connection_properties(const string_view proxy,
const string_view access_token,
const string_view cainfo,
const string_view useragent)
{
if (!proxy.empty())
{
set_proxy(proxy);
}
if (!access_token.empty())
{
set_access_token(access_token);
}
if (!cainfo.empty())
{
set_cainfo(cainfo);
}
if (!useragent.empty())
{
set_useragent(useragent);
}
}
void CURLWrapper::set_proxy(const string_view proxy)
{
// NOLINTNEXTLINE(cppcoreguidelines-pro-type-vararg)
CURLcode code{curl_easy_setopt(_connection, CURLOPT_PROXY, proxy.data())};
if (code != CURLE_OK)
{
throw CURLException{code, "Failed to set proxy", _curl_buffer_error};
}
}
void CURLWrapper::set_access_token(const string_view access_token)
{
// NOLINTNEXTLINE(cppcoreguidelines-pro-type-vararg, hicpp-signed-bitwise)
@ -223,7 +249,7 @@ void CURLWrapper::set_access_token(const string_view access_token)
debuglog << "Set authorization token.\n";
}
void CURLWrapper::set_cainfo(string_view path)
void CURLWrapper::set_cainfo(const string_view path)
{
CURLcode code{curl_easy_setopt(_connection, CURLOPT_CAINFO, path.data())};
if (code != CURLE_OK)
@ -232,6 +258,19 @@ void CURLWrapper::set_cainfo(string_view path)
}
}
void CURLWrapper::set_useragent(const string_view useragent)
{
// NOLINTNEXTLINE(cppcoreguidelines-pro-type-vararg)
CURLcode code{curl_easy_setopt(_connection, CURLOPT_USERAGENT,
useragent.data())};
if (code != CURLE_OK)
{
throw CURLException{code, "Failed to set User-Agent",
_curl_buffer_error};
}
debuglog << "Set User-Agent to: " << useragent << '\n';
}
size_t CURLWrapper::writer_body(char *data, size_t size, size_t nmemb)
{
if(data == nullptr)
@ -296,18 +335,11 @@ void CURLWrapper::setup_curl()
// NOLINTNEXTLINE(cppcoreguidelines-pro-type-vararg)
curl_easy_setopt(_connection, CURLOPT_NOPROGRESS, 0L);
// NOLINTNEXTLINE(cppcoreguidelines-pro-type-vararg)
CURLcode code{curl_easy_setopt(_connection, CURLOPT_USERAGENT,
(string("mastodonpp/") += version).c_str())};
if (code != CURLE_OK)
{
throw CURLException{code, "Failed to set User-Agent",
_curl_buffer_error};
}
set_useragent((string("mastodonpp/") += version));
// The next 2 only fail if HTTP is not supported.
// NOLINTNEXTLINE(cppcoreguidelines-pro-type-vararg)
code = curl_easy_setopt(_connection, CURLOPT_FOLLOWLOCATION, 1L);
CURLcode code{curl_easy_setopt(_connection, CURLOPT_FOLLOWLOCATION, 1L)};
if (code != CURLE_OK)
{
throw CURLException{code, "HTTP is not supported.", _curl_buffer_error};

217
src/instance.cpp
View File

@ -20,6 +20,7 @@
#include <algorithm>
#include <exception>
#include <regex>
namespace mastodonpp
{
@ -27,54 +28,52 @@ namespace mastodonpp
using std::sort;
using std::stoull;
using std::exception;
using std::regex;
using std::regex_search;
using std::smatch;
Instance::Instance(const string_view hostname, const string_view access_token)
: _hostname{hostname}
, _baseuri{"https://" + _hostname}
, _access_token{access_token}
, _max_chars{0}
{}
uint64_t Instance::get_max_chars()
uint64_t Instance::get_max_chars() noexcept
{
constexpr uint64_t default_max_chars{500};
if (_max_chars == 0)
if (_max_chars != 0)
{
try
{
debuglog << "Querying " << _hostname << " for max_toot_chars…\n";
const auto answer{make_request(http_method::GET,
_baseuri + "/api/v1/instance", {})};
if (!answer)
{
debuglog << "Could not get instance info.\n";
return default_max_chars;
}
return _max_chars;
}
_max_chars = [&answer]
{
auto &body{answer.body};
size_t pos_start{body.find("max_toot_chars")};
if (pos_start == string::npos)
{
debuglog << "max_toot_chars not found.\n";
return default_max_chars;
}
pos_start = body.find(':', pos_start) + 1;
const size_t pos_end{body.find(',', pos_start)};
const auto max_toot_chars{body.substr(pos_start,
pos_end - pos_start)};
return static_cast<uint64_t>(stoull(max_toot_chars));
}();
debuglog << "Set _max_chars to: " << _max_chars << '\n';
}
catch (const exception &e)
try
{
debuglog << "Querying " << _hostname << " for max_toot_chars…\n";
const auto answer{make_request(http_method::GET,
_baseuri + "/api/v1/instance", {})};
if (!answer)
{
debuglog << "Unexpected exception: " << e.what() << '\n';
debuglog << "Could not get instance info.\n";
return default_max_chars;
}
_max_chars = [&answer]
{
auto &body{answer.body};
size_t pos_start{body.find("max_toot_chars")};
if (pos_start == string::npos)
{
debuglog << "max_toot_chars not found.\n";
return default_max_chars;
}
pos_start = body.find(':', pos_start) + 1;
const size_t pos_end{body.find(',', pos_start)};
const auto max_toot_chars{body.substr(pos_start,
pos_end - pos_start)};
return static_cast<uint64_t>(stoull(max_toot_chars));
}();
debuglog << "Set _max_chars to: " << _max_chars << '\n';
}
catch (const exception &e)
{
debuglog << "Unexpected exception: " << e.what() << '\n';
return default_max_chars;
}
return _max_chars;
@ -107,7 +106,7 @@ answer_type Instance::get_nodeinfo()
return make_request(http_method::GET, hrefs.back(), {});
}
vector<string> Instance::get_post_formats()
vector<string> Instance::get_post_formats() noexcept
{
constexpr auto default_value{"text/plain"};
@ -116,36 +115,128 @@ vector<string> Instance::get_post_formats()
return _post_formats;
}
debuglog << "Querying " << _hostname << " for postFormats…\n";
const auto answer{get_nodeinfo()};
if (!answer)
try
{
debuglog << "Couldn't get NodeInfo.\n";
_post_formats = {default_value};
return _post_formats;
}
debuglog << "Querying " << _hostname << " for postFormats…\n";
const auto answer{get_nodeinfo()};
if (!answer)
{
debuglog << "Couldn't get NodeInfo.\n";
_post_formats = {default_value};
return _post_formats;
}
constexpr string_view searchstring{R"("postFormats":[)"};
auto pos{answer.body.find(searchstring)};
if (pos == string::npos)
{
debuglog << "Couldn't find metadata.postFormats.\n";
_post_formats = {default_value};
return _post_formats;
}
pos += searchstring.size();
auto endpos{answer.body.find("],", pos)};
string formats{answer.body.substr(pos, endpos - pos)};
debuglog << "Extracted postFormats: " << formats << '\n';
constexpr string_view searchstring{R"("postFormats":[)"};
auto pos{answer.body.find(searchstring)};
if (pos == string::npos)
{
debuglog << "Couldn't find metadata.postFormats.\n";
_post_formats = {default_value};
return _post_formats;
}
pos += searchstring.size();
auto endpos{answer.body.find("],", pos)};
string formats{answer.body.substr(pos, endpos - pos)};
debuglog << "Extracted postFormats: " << formats << '\n';
while ((pos = formats.find('"', 1)) != string::npos)
while ((pos = formats.find('"', 1)) != string::npos)
{
_post_formats.push_back(formats.substr(1, pos - 1));
formats.erase(0, pos + 2); // 2 is the length of: ",
debuglog << "Found postFormat: " << _post_formats.back() << '\n';
}
}
catch (const std::exception &e)
{
_post_formats.push_back(formats.substr(1, pos - 1));
formats.erase(0, pos + 2); // 2 is the length of: ",
debuglog << "Found postFormat: " << _post_formats.back() << '\n';
debuglog << "Unexpected exception: " << e.what() << '\n';
return {default_value};
}
return _post_formats;
}
answer_type Instance::ObtainToken::step_1(const string_view client_name,
const string_view scopes,
const string_view website)
{
parametermap parameters
{
{"client_name", client_name},
{"redirect_uris", "urn:ietf:wg:oauth:2.0:oob"}
};
if (!scopes.empty())
{
_scopes = scopes;
parameters.insert({"scopes", scopes});
}
if (!website.empty())
{
parameters.insert({"website", website});
}
auto answer{make_request(http_method::POST, _baseuri + "/api/v1/apps",
parameters)};
if (answer)
{
const regex re_id{R"("client_id"\s*:\s*"([^"]+)\")"};
const regex re_secret{R"("client_secret"\s*:\s*"([^"]+)\")"};
smatch match;
if (regex_search(answer.body, match, re_id))
{
_client_id = match[1].str();
}
if (regex_search(answer.body, match, re_secret))
{
_client_secret = match[1].str();
}
string uri{_baseuri + "/oauth/authorize?scope=" + escape_url(scopes)
+ "&response_type=code"
"&redirect_uri=" + escape_url("urn:ietf:wg:oauth:2.0:oob")
+ "&client_id=" + _client_id};
if (!website.empty())
{
uri += "&website=" + escape_url(website);
}
answer.body = uri;
debuglog << "Built URI.";
}
return answer;
}
answer_type Instance::ObtainToken::step_2(const string_view code)
{
parametermap parameters
{
{"client_id", _client_id},
{"client_secret", _client_secret},
{"redirect_uri", "urn:ietf:wg:oauth:2.0:oob"},
{"code", code},
{"grant_type", "client_credentials"}
};
if (!_scopes.empty())
{
parameters.insert({"scope", _scopes});
}
auto answer{make_request(http_method::POST, _baseuri + "/oauth/token",
parameters)};
if (answer)
{
const regex re_token{R"("access_token"\s*:\s*"([^"]+)\")"};
smatch match;
if (regex_search(answer.body, match, re_token))
{
answer.body = match[1].str();
debuglog << "Got access token.\n";
_instance.set_access_token(answer.body);
}
}
return answer;
}
} // namespace mastodonpp