107 lines
4.0 KiB
Diff
107 lines
4.0 KiB
Diff
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diff --git a/src/libcmis/oauth2-providers.cxx b/src/libcmis/oauth2-providers.cxx
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index 5e7f3bf..68a6aa5 100644
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--- a/src/libcmis/oauth2-providers.cxx
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+++ b/src/libcmis/oauth2-providers.cxx
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@@ -37,11 +37,28 @@ using namespace std;
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string OAuth2Providers::OAuth2Gdrive( HttpSession* session, const string& authUrl,
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const string& username, const string& password )
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{
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+ /* This member function implements 'Google OAuth 2.0'
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+ *
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+ * The interaction is carried out by libcmis, with no web browser involved.
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+ *
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+ * Normal sequence (without 2FA) is:
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+ * 1) a get to activate login page
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+ * receive first login page, html format
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+ * 2) subsequent post to sent email
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+ * receive html page for password input
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+ * 3) subsequent post to send password
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+ * receive html page for application consent
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+ * 4) subsequent post to send a consent for the application
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+ * receive a single-use authorization code
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+ * this code is returned as a string
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+ */
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+
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static const string CONTENT_TYPE( "application/x-www-form-urlencoded" );
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// STEP 1: Log in
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string res;
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try
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{
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+ // send the first get, receive the html login page
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res = session->httpGetRequest( authUrl )->getStream( )->str( );
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}
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catch ( const CurlException& e )
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@@ -49,20 +66,39 @@ string OAuth2Providers::OAuth2Gdrive( HttpSession* session, const string& authUr
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return string( );
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}
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- string loginPost, loginLink;
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- if ( !parseResponse( res.c_str( ), loginPost, loginLink ) )
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+ string loginEmailPost, loginEmailLink;
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+ if ( !parseResponse( res.c_str( ), loginEmailPost, loginEmailLink ) )
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return string( );
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-
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- loginPost += "Email=";
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- loginPost += string( username );
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- loginPost += "&Passwd=";
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- loginPost += string( password );
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-
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- istringstream loginIs( loginPost );
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- string loginRes;
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- try
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+
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+ loginEmailPost += "Email=";
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+ loginEmailPost += string( username );
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+
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+ istringstream loginEmailIs( loginEmailPost );
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+ string loginEmailRes;
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+ try
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+ {
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+ // send a post with user email, receive the html page for password input
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+ loginEmailRes = session->httpPostRequest ( loginEmailLink, loginEmailIs, CONTENT_TYPE )
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+ ->getStream( )->str( );
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+ }
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+ catch ( const CurlException& e )
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+ {
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+ return string( );
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+ }
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+
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+ string loginPasswdPost, loginPasswdLink;
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+ if ( !parseResponse( loginEmailRes.c_str( ), loginPasswdPost, loginPasswdLink ) )
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+ return string( );
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+
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+ loginPasswdPost += "Passwd=";
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+ loginPasswdPost += string( password );
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+
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+ istringstream loginPasswdIs( loginPasswdPost );
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+ string loginPasswdRes;
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+ try
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{
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- loginRes = session->httpPostRequest ( loginLink, loginIs, CONTENT_TYPE )
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+ // send a post with user password, receive the application consent page
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+ loginPasswdRes = session->httpPostRequest ( loginPasswdLink, loginPasswdIs, CONTENT_TYPE )
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->getStream( )->str( );
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}
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catch ( const CurlException& e )
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@@ -71,8 +107,8 @@ string OAuth2Providers::OAuth2Gdrive( HttpSession* session, const string& authUr
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}
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// STEP 2: allow libcmis to access google drive
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- string approvalPost, approvalLink;
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- if ( !parseResponse( loginRes. c_str( ), approvalPost, approvalLink) )
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+ string approvalPost, approvalLink;
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+ if ( !parseResponse( loginPasswdRes. c_str( ), approvalPost, approvalLink) )
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return string( );
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approvalPost += "submit_access=true";
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@@ -80,7 +116,8 @@ string OAuth2Providers::OAuth2Gdrive( HttpSession* session, const string& authUr
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string approvalRes;
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try
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{
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- approvalRes = session->httpPostRequest ( approvalLink, approvalIs,
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+ // send a post with application consent
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+ approvalRes = session->httpPostRequest ( approvalLink, approvalIs,
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CONTENT_TYPE) ->getStream( )->str( );
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}
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catch ( const CurlException& e )
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