如何利用POCO网库在Spotify中实现令牌换码 [英] How to exchange code for token in Spotify using Poco Net Library
本文介绍了如何利用POCO网库在Spotify中实现令牌换码的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
所以他们突然决定我需要Spotify搜索API的授权头。
我的应用程序使用POCO Net库在C++中运行,但我无法使其工作。
我经历了所有过程才得到了我应该用来交换令牌的"代码"。我假设这段代码是有效的,即使我只使用了一个完全不相关的域,然后复制了发送到该页面的变量的域。
参见https://developer.spotify.com/web-api/authorization-guide/
这是我的代码不起作用:
bool getToken()
{
Poco::URI loginURI( "https://accounts.spotify.com" );
Poco::Net::HTTPSClientSession loginSession( loginURI.getHost(), loginURI.getPort(), context );
// Poco::Net::HTTPBasicCredentials credentials( clientId, clientSecret );
std::ostringstream requestOStr;
requestOStr << "https://accounts.spotify.com/api/token?grant_type=authorization_code&code="
<< (m_refreshToken.empty() ? code : m_refreshToken)
<< "&redirect_uri=" << redirectURI
<< "&client_id=" << clientId << "&client_secret=" << clientSecret;
std::string requestStr( requestOStr.str() );
Poco::Net::HTTPRequest loginRequest( Poco::Net::HTTPRequest::HTTP_POST, requestStr,
Poco::Net::HTTPMessage::HTTP_1_1 );
// credentials.authenticate( loginRequest );
loginSession.sendRequest( loginRequest );
Poco::Net::HTTPResponse response;
std::istream& rs = loginSession.receiveResponse( response );
std::cout << "Login request " << requestStr << std::endl;
std::cout << "Login response status " << static_cast<int>(response.getStatus()) << ", "
<< response.getReason() << std::endl;
std::string rsStr(std::istreambuf_iterator<char>(rs), {});
if( rsStr.empty() )
{
std::cout << "No results" << std::endl;
return false;
}
else
{
std::cout << "Logon response:
" << rsStr << std::endl;
}
Parser parser;
Var result;
result = parser.parse(rsStr);
Object::Ptr obj = result.extract<Object::Ptr>();
try
{
Var tokenVar = obj->get( "access_token ");
if( tokenVar.isString() )
{
m_token = tokenVar.convert< std::string >();
}
else
{
std::cerr << "Could not get access token" << std::endl;
return false;
}
Var refreshTokenVar = obj->get( "refresh_token" );
if( refreshTokenVar.isString() )
{
m_refreshToken = refreshTokenVar.convert< std::string >();
}
return true;
}
catch( const std::exception& err )
{
std::cerr << "Error getting login token" << err.what() << std::endl;
return false;
}
}
我尝试了BasicCredentials,而不是将客户端ID和ClientSecret放入请求,但得到了相同的结果。
以下是修改了值的HTTP请求的外观:
https://accounts.spotify.com/api/token?grant_type=authorization_code&code=THE_CODE&redirect_uri=THE_REDIRECT_URI&client_id=THE_CLIENT_ID&client_secret=THE_CLIENT_SECRET
我得到的回复是:
Login response status 400, Bad Request
{"error":"server_error","error_description":"Unexpected status: 400"}
推荐答案
好了,我现在回答我自己的问题,已经找到了答案。我的错误是错误地使用了POST。
一旦我有了原始的AUTHORIZATION_CODE,它就可以工作了。一旦"交换",代码将不再有效,但这是另一回事。
bool getToken()
{
Poco::URI loginURI( "https://accounts.spotify.com" );
Poco::Net::HTTPSClientSession loginSession( loginURI.getHost(), loginURI.getPort(), context );
Poco::Net::HTTPBasicCredentials credentials( clientId, clientSecret );
loginSession.setKeepAlive( true );
std::string requestStr( "https://accounts.spotify.com/api/token" );
Poco::Net::HTTPRequest loginRequest( Poco::Net::HTTPRequest::HTTP_POST,
requestStr,
Poco::Net::HTTPMessage::HTTP_1_1 );
loginRequest.setContentType("application/x-www-form-urlencoded");
loginRequest.setKeepAlive( true );
std::string grantType;
std::string authCode;
if( m_refreshToken.empty() )
{
grantType = "authorization_code";
authCode = code;
}
else
{
grantType = "refresh_token";
authCode = m_refreshToken;
}
std::ostringstream contentOStr;
contentOStr << "grant_type=" << grantType <<
"&code=" << authCode
<< "&redirect_uri=" << redirectURI;
std::string contentStr = contentOStr.str();
loginRequest.setContentLength( contentStr.size() );
credentials.authenticate( loginRequest );
std::ostream& requestOStr = loginSession.sendRequest( loginRequest );
requestOStr << contentStr;
requestOStr.flush();
Poco::Net::HTTPResponse response;
std::istream& rs = loginSession.receiveResponse( response );
std::cout << "Login request ";
loginRequest.write(std::cout);
std::cout << std::endl;
std::cout << "Login response status " << static_cast<int>(response.getStatus()) << ", "
<< response.getReason() << std::endl;
std::string rsStr(std::istreambuf_iterator<char>(rs), {});
if( rsStr.empty() )
{
std::cout << "No results" << std::endl;
return false;
}
else
{
std::cout << "Logon response:
" << rsStr << std::endl;
}
Parser parser;
Var result;
result = parser.parse(rsStr);
Object::Ptr obj = result.extract<Object::Ptr>();
try
{
Var tokenVar = obj->get( "access_token" );
if( tokenVar.isString() )
{
m_token = tokenVar.convert< std::string >();
}
else
{
std::cerr << "Could not get access token" << std::endl;
return false;
}
Var refreshTokenVar = obj->get( "refresh_token" );
if( refreshTokenVar.isString() )
{
m_refreshToken = refreshTokenVar.convert< std::string >();
}
return true;
}
catch( const std::exception& err )
{
std::cerr << "Error getting login token" << err.what() << std::endl;
return false;
}
}
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