/
MSGraphAuthServlet.java
280 lines (242 loc) · 6.35 KB
/
MSGraphAuthServlet.java
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/**
* Copyright (c) 2006-2019, JGraph Ltd
*/
package com.mxgraph.online;
import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.net.HttpURLConnection;
import java.net.URL;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@SuppressWarnings("serial")
public class MSGraphAuthServlet extends HttpServlet
{
/**
*
*/
public static final String DEV_CLIENT_SECRET_FILE_PATH = "/WEB-INF/msgraph_dev_client_secret";
/**
*
*/
private static String DEV_CLIENT_SECRET = null;
/**
*
*/
public static final String CLIENT_SECRET_FILE_PATH = "/WEB-INF/msgraph_client_secret";
/**
*
*/
private static String CLIENT_SECRET = null;
/**
*
*/
public static final String DEV_CLIENT_ID_FILE_PATH = "/WEB-INF/msgraph_dev_client_id";
/**
*
*/
private static String DEV_CLIENT_ID = null;
/**
*
*/
public static final String CLIENT_ID_FILE_PATH = "/WEB-INF/msgraph_client_id";
/**
*
*/
private static String CLIENT_ID = null;
/**
*
*/
public static final String DEV_REDIRECT_URI = "https://test.draw.io/microsoft";
/**
*
*/
public static final String REDIRECT_URI = "https://www.draw.io/microsoft";
/**
* @see HttpServlet#HttpServlet()
*/
public MSGraphAuthServlet()
{
super();
}
/**
* Loads the key.
*/
protected void updateKeys()
{
if (DEV_CLIENT_SECRET == null)
{
try
{
DEV_CLIENT_SECRET = Utils
.readInputStream(getServletContext()
.getResourceAsStream(DEV_CLIENT_SECRET_FILE_PATH))
.replaceAll("\n", "");
}
catch (IOException e)
{
throw new RuntimeException("Dev client secret path invalid.");
}
}
if (CLIENT_SECRET == null)
{
try
{
CLIENT_SECRET = Utils
.readInputStream(getServletContext()
.getResourceAsStream(CLIENT_SECRET_FILE_PATH))
.replaceAll("\n", "");
}
catch (IOException e)
{
throw new RuntimeException("Client secret path invalid.");
}
}
if (DEV_CLIENT_ID == null)
{
try
{
DEV_CLIENT_ID = Utils
.readInputStream(getServletContext()
.getResourceAsStream(DEV_CLIENT_ID_FILE_PATH))
.replaceAll("\n", "");
}
catch (IOException e)
{
throw new RuntimeException("Dev client ID invalid.");
}
}
if (CLIENT_ID == null)
{
try
{
CLIENT_ID = Utils
.readInputStream(getServletContext()
.getResourceAsStream(CLIENT_ID_FILE_PATH))
.replaceAll("\n", "");
}
catch (IOException e)
{
throw new RuntimeException("Client ID invalid.");
}
}
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException
{
String code = request.getParameter("code");
String refreshToken = request.getParameter("refresh_token");
updateKeys();
String secret, client, redirectUri;
if ("127.0.0.1".equals(request.getServerName()))
{
secret = DEV_CLIENT_SECRET;
client = DEV_CLIENT_ID;
redirectUri = DEV_REDIRECT_URI;
}
else
{
secret = CLIENT_SECRET;
client = CLIENT_ID;
redirectUri = REDIRECT_URI;
}
if (code == null && refreshToken == null)
{
response.setStatus(HttpServletResponse.SC_BAD_REQUEST);
}
else
{
try
{
String url = "https://login.microsoftonline.com/common/oauth2/v2.0/token";
URL obj = new URL(url);
HttpURLConnection con = (HttpURLConnection) obj.openConnection();
con.setRequestMethod("POST");
con.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
boolean jsonResponse = false;
StringBuilder urlParameters = new StringBuilder();
urlParameters.append("client_id=");
urlParameters.append(client);
urlParameters.append("&redirect_uri=");
urlParameters.append(redirectUri);
urlParameters.append("&client_secret=");
urlParameters.append(secret);
if (code != null)
{
urlParameters.append("&code=");
urlParameters.append(code);
urlParameters.append("&grant_type=authorization_code");
}
else
{
urlParameters.append("&refresh_token=");
urlParameters.append(refreshToken);
urlParameters.append("&grant_type=refresh_token");
jsonResponse = true;
}
// Send post request
con.setDoOutput(true);
DataOutputStream wr = new DataOutputStream(con.getOutputStream());
wr.writeBytes(urlParameters.toString());
wr.flush();
wr.close();
BufferedReader in = new BufferedReader(
new InputStreamReader(con.getInputStream()));
String inputLine;
StringBuffer res = new StringBuffer();
//Call the opener callback function directly with the given json
if (!jsonResponse)
{
res.append("<!DOCTYPE html><html><head><script src=\"https://appsforoffice.microsoft.com/lib/1.1/hosted/office.js\" type=\"text/javascript\"></script><script>");
res.append("var authInfo = "); //The following is a json containing access_token and redresh_token
}
while ((inputLine = in.readLine()) != null)
{
res.append(inputLine);
}
in.close();
if (!jsonResponse)
{
res.append(";");
res.append("if (window.opener != null && window.opener.onOneDriveCallback != null)");
res.append("{");
res.append(" window.opener.onOneDriveCallback(authInfo, window);");
res.append("} else {");
res.append(" Office.initialize = function () { Office.context.ui.messageParent(JSON.stringify(authInfo));}");
res.append("}");
res.append("</script></head><body></body></html>");
}
response.setStatus(con.getResponseCode());
OutputStream out = response.getOutputStream();
PrintWriter writer = new PrintWriter(out);
// Writes JavaScript code
writer.println(res.toString());
writer.flush();
writer.close();
}
catch(IOException e)
{
if (e.getMessage().contains("401"))
{
response.setStatus(HttpServletResponse.SC_UNAUTHORIZED);
}
else
{
response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
}
}
catch (Exception e)
{
response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
}
}
}
}