Add Instance::ObtainToken.
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CFC39497F1B26E07
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@ -192,6 +192,84 @@ public:
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return _cainfo;
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}
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/*!
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* @brief Simplifies obtaining an OAuth 2.0 Bearer Access Token.
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*
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* * Create an Instance() and initialize this class with it.
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* * Call step_1() to get the URI your user has to visit.
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* * Get the authorization code from your user.
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* * Call step_2() with the code.
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*
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* Example:
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* @code
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* mastodonpp::Instance instance("example.com", {});
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* mastodonpp::Instance::ObtainToken token(instance);
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* auto answer{token.step1("Good program", "read:blocks read:mutes", "")};
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* if (answer)
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* {
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* std::cout << "Please visit " << answer << "\nand paste the code: ";
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* std::string code;
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* std::cin >> code;
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* answer = access_token{token.step2(code)};
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* if (answer)
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* {
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* std::cout << "Success!\n";
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* }
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* }
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* @endcode
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*
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* @since 0.3.0
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*/
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class ObtainToken : public CURLWrapper
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{
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public:
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ObtainToken(Instance &instance);
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/*!
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* @brief Creates an application via `/api/v1/apps`.
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*
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* The `body` of the returned @link answer_type answer @endlink
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* contains only the URI, not the whole JSON response.
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*
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* @param client_name The name of your application.
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* @param scopes Space separated list of scopes. Defaults to
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* “read” if empty.
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* @param website The URI to the homepage of your application. Can
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* be an empty string.
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*
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* @return The URI your user has to visit.
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*
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* @since 0.3.0
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*/
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[[nodiscard]]
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answer_type step_1(string_view client_name, string_view scopes,
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string_view website);
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/*!
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* @brief Creates a token via `/oauth/token`.
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*
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* The `body` of the returned @link answer_type answer @endlink
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* contains only the access token, not the whole JSON response.
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*
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* The access token will be set in the parent Instance.
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*
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* @param code The authorization code you got from the user.
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*
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* @return The access token.
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*
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* @since 0.3.0
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*/
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[[nodiscard]]
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answer_type step_2(string_view code);
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private:
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Instance &_instance;
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const string _baseuri;
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string _scopes;
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string _client_id;
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string _client_secret;
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};
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private:
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const string _hostname;
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const string _baseuri;
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118
src/instance.cpp
118
src/instance.cpp
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@ -20,6 +20,7 @@
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#include <algorithm>
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#include <exception>
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#include <regex>
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namespace mastodonpp
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{
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@ -27,6 +28,9 @@ namespace mastodonpp
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using std::sort;
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using std::stoull;
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using std::exception;
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using std::regex;
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using std::regex_search;
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using std::smatch;
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Instance::Instance(const string_view hostname, const string_view access_token)
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: _hostname{hostname}
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@ -158,24 +162,108 @@ vector<string> Instance::get_post_formats() noexcept
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return _post_formats;
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}
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Instance::ObtainToken::ObtainToken(Instance &instance)
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: _instance{instance}
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, _baseuri{instance.get_baseuri()}
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{
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auto proxy{_instance.get_proxy()};
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if (!proxy.empty())
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{
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debuglog << "Couldn't find metadata.postFormats.\n";
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_post_formats = {default_value};
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return _post_formats;
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}
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pos += searchstring.size();
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auto endpos{answer.body.find("],", pos)};
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string formats{answer.body.substr(pos, endpos - pos)};
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debuglog << "Extracted postFormats: " << formats << '\n';
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while ((pos = formats.find('"', 1)) != string::npos)
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{
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_post_formats.push_back(formats.substr(1, pos - 1));
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formats.erase(0, pos + 2); // 2 is the length of: ",
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debuglog << "Found postFormat: " << _post_formats.back() << '\n';
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CURLWrapper::set_proxy(proxy);
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}
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return _post_formats;
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if (!_instance.get_access_token().empty())
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{
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CURLWrapper::set_access_token(_instance.get_access_token());
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}
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if (!_instance.get_cainfo().empty())
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{
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CURLWrapper::set_cainfo(_instance.get_cainfo());
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}
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}
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answer_type Instance::ObtainToken::step_1(const string_view client_name,
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const string_view scopes,
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const string_view website)
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{
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parametermap parameters
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{
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{"client_name", client_name},
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{"redirect_uris", "urn:ietf:wg:oauth:2.0:oob"}
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};
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if (!scopes.empty())
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{
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_scopes = scopes;
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parameters.insert({"scopes", scopes});
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}
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if (!website.empty())
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{
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parameters.insert({"website", website});
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}
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auto answer{make_request(http_method::POST, _baseuri + "/api/v1/apps",
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parameters)};
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if (answer)
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{
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const regex re_id{R"("client_id"\s*:\s*"([^"]+)\")"};
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const regex re_secret{R"("client_secret"\s*:\s*"([^"]+)\")"};
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smatch match;
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if (regex_search(answer.body, match, re_id))
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{
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_client_id = match[1].str();
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}
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if (regex_search(answer.body, match, re_secret))
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{
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_client_secret = match[1].str();
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}
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string uri{_baseuri + "/oauth/authorize?scope=" + escape_url(scopes)
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+ "&response_type=code"
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"&redirect_uri=" + escape_url("urn:ietf:wg:oauth:2.0:oob")
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+ "&client_id=" + _client_id};
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if (!website.empty())
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{
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uri += "&website=" + escape_url(website);
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}
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answer.body = uri;
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debuglog << "Built URI.";
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}
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return answer;
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}
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answer_type Instance::ObtainToken::step_2(const string_view code)
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{
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parametermap parameters
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{
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{"client_id", _client_id},
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{"client_secret", _client_secret},
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{"redirect_uri", "urn:ietf:wg:oauth:2.0:oob"},
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{"code", code},
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{"grant_type", "client_credentials"}
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};
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if (!_scopes.empty())
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{
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parameters.insert({"scope", _scopes});
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}
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auto answer{make_request(http_method::POST, _baseuri + "/oauth/token",
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parameters)};
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if (answer)
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{
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const regex re_token{R"("access_token"\s*:\s*"([^"]+)\")"};
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smatch match;
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if (regex_search(answer.body, match, re_token))
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{
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answer.body = match[1].str();
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debuglog << "Got access token.\n";
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_instance.set_access_token(answer.body);
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}
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}
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return answer;
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}
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} // namespace mastodonpp
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