Code covered by the BSD License  

Highlights from
View and add transaction to portfolios on Google Finance

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from View and add transaction to portfolios on Google Finance by ted teng
View and add transactions to portfolios on Google Finance. A Google account will be required.

setGooglePortfolioHoldings(username,password,portfolioId,tickerId,action,shares,price,comission) 
function success = setGooglePortfolioHoldings(username,password,portfolioId,tickerId,action,shares,price,comission)
% setGooglePortfolioHoldings trades virtual stock holdings
% in the given Google Finance Portfolio.
% See accompanying example (googlePortfolioHoldingsExample.m) on how it can
% be used.

if nargin < 8
    display('requires 7 parameters! setPortfolioHoldings.m');
    return;
end

%import java stuff.
import java.io.*;
import java.net.*;
import java.lang.*;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;

%get token from google.
[authorized, aToken]=connectAndAuthorize(username, password, 'finance');

if (~authorized)
    result=-1;
    return;
end


%get current date.
now = Date();
now.setTime(now.getTime());
df = SimpleDateFormat('yyyy-MM-dd HH:mm:ss');
time=df.format(now);
time=time.replace(' ', 'T');

%create entry for transaction.
event=['<entry xmlns=''http://www.w3.org/2005/Atom'' ' ...
    'xmlns:gf=''http://schemas.google.com/finance/2007'' '...
         'xmlns:gd=''http://schemas.google.com/g/2005''>'...
 '<gf:transactionData date=''',char(time),'.000', ...
 ''' shares=''', num2str(shares), ''' type=''', action, '''> <gf:commission> '...
 '<gd:money amount=''',num2str(comission),''' currencyCode=''USD''/> '...
'</gf:commission> <gf:price>'...
'<gd:money amount=''', num2str(price), ''' currencyCode=''USD''/> '...
'</gf:price> </gf:transactionData> </entry>'];         


%try to post entry to portfolio on Google Finance.
MAXITER=3;
success=false;
try
    % try to create new event
    safeguard=0;
    while (~success && safeguard<MAXITER)
       safeguard=safeguard+1;

        %get the portfolio info
        geturlString = ['http://finance.google.com/finance/feeds/default/portfolios/',num2str(portfolioId),'/positions/',tickerId,'/transactions/'];

        url = URL( geturlString );
        con = url.openConnection();    
        con.setInstanceFollowRedirects(false);
        con.setRequestMethod( 'POST' );      
        con.setDoOutput( true );
        con.setDoInput( true );
        con.setRequestProperty('content-type','application/atom+xml;charset=UTF-8');
        % stuff the Authorization request header
        con.setRequestProperty('Authorization',String('GoogleLogin ').concat(aToken));
        
        ps = PrintStream(con.getOutputStream());
        ps.print(event);
        ps.close();
        is = con.getInputStream();
        if (con.getResponseCode()~=201)
            display(sprintf('transaction failed, http code: %d',con.getResponseCode()));
            con.disconnect();
            success = false;
            return;
        else
            %display(sprintf('transaction complete, http code: %d',con.getResponseCode()));
            success=true;
            %continue;
        end
end
catch ME
    disp(ME.message);
    disp(['from line: ' num2str(ME.stack.line)]);
    success = false;
    return;
end

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