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(C#) Quickbooks OAuth1 Authorization (3-legged)

Demonstrates 3-legged OAuth1 authorization for Quickbooks.

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string consumerKey = "QUICKBOOKS_CONSUMER_KEY";
string consumerSecret = "QUICKBOOKS_CONSUMER_SECRET";

string requestTokenUrl = "https://oauth.intuit.com/oauth/v1/get_request_token";
string authorizeUrl = "https://appcenter.intuit.com/Connect/Begin";
string accessTokenUrl = "https://oauth.intuit.com/oauth/v1/get_access_token";

//  The port number is picked at random. It's some unused port that won't likely conflict with anything else..
string callbackUrl = "http://localhost:3017/";
int callbackLocalPort = 3017;

//  The 1st step in 3-legged OAuth1.0a is to send a POST to the request token URL to obtain an OAuth Request Token
Chilkat.Http http = new Chilkat.Http();
bool success;

http.OAuth1 = true;
http.OAuthConsumerKey = consumerKey;
http.OAuthConsumerSecret = consumerSecret;
http.OAuthCallback = callbackUrl;

Chilkat.HttpRequest req = new Chilkat.HttpRequest();
Chilkat.HttpResponse resp = http.PostUrlEncoded(requestTokenUrl,req);
if (http.LastMethodSuccess != true) {
    Console.WriteLine(http.LastErrorText);
    return;
}

if (resp.StatusCode >= 400) {
    Console.WriteLine("Error response status code = " + Convert.ToString(resp.StatusCode));
    Console.WriteLine(resp.BodyStr);
    return;
}

//  If successful, the resp.BodyStr contains this:
//  oauth_token=-Wa_KwAAAAAAxfEPAAABV8Qar4Q&oauth_token_secret=OfHY4tZBX2HK4f7yIw76WYdvnl99MVGB&oauth_callback_confirmed=true
Console.WriteLine(resp.BodyStr);

Chilkat.Hashtable hashTab1 = new Chilkat.Hashtable();
hashTab1.AddQueryParams(resp.BodyStr);

string requestToken = hashTab1.LookupStr("oauth_token");
string requestTokenSecret = hashTab1.LookupStr("oauth_token_secret");
http.OAuthTokenSecret = requestTokenSecret;

Console.WriteLine("oauth_token = " + requestToken);
Console.WriteLine("oauth_token_secret = " + requestTokenSecret);

//  ---------------------------------------------------------------------------
//  The next step is to form a URL to send to the AuthorizeUrl
//  This is an HTTP GET that we load into a popup browser.
Chilkat.StringBuilder sbUrlForBrowser = new Chilkat.StringBuilder();
sbUrlForBrowser.Append(authorizeUrl);
sbUrlForBrowser.Append("?oauth_token=");
sbUrlForBrowser.Append(requestToken);
string urlForBrowser = sbUrlForBrowser.GetAsString();

//  When the urlForBrowser is loaded into a browser, the response from Quickbooks will redirect back to localhost:3017
//  We'll need to start a socket that is listening on port 3017 for the callback from the browser.
Chilkat.Socket listenSock = new Chilkat.Socket();

int backLog = 5;
success = listenSock.BindAndListen(callbackLocalPort,backLog);
if (success != true) {
    Console.WriteLine(listenSock.LastErrorText);
    return;
}

//  Wait for the browser's connection in a background thread.
//  (We'll send load the URL into the browser following this..)
//  Wait a max of 60 seconds before giving up.
int maxWaitMs = 60000;
Chilkat.Task task = listenSock.AcceptNextConnectionAsync(maxWaitMs);
task.Run();

//   At this point, your application should load the URL in a browser.
//   For example,
//   in C#:  System.Diagnostics.Process.Start(urlForBrowser);
//   in Java: Desktop.getDesktop().browse(new URI(urlForBrowser));
//   in VBScript: Set wsh=WScript.CreateObject("WScript.Shell")
//                wsh.Run urlForBrowser
//   The Quickbooks account owner would interactively accept or deny the authorization request.

//   Add the code to load the url in a web browser here...
//   Add the code to load the url in a web browser here...
//   Add the code to load the url in a web browser here...
// System.Diagnostics.Process.Start(urlForBrowser);

//  Wait for the listenSock's task to complete.
success = task.Wait(maxWaitMs);
if (!success || (task.StatusInt != 7) || (task.TaskSuccess != true)) {
    if (!success) {
        //  The task.LastErrorText applies to the Wait method call.
        Console.WriteLine(task.LastErrorText);
    }
    else {
        //  The ResultErrorText applies to the underlying task method call (i.e. the AcceptNextConnection)
        Console.WriteLine(task.Status);
        Console.WriteLine(task.ResultErrorText);
    }

    return;
}

//  If we get to this point, the connection from the browser arrived and was accepted.

//  We no longer need the listen socket...
//  Close it so that it's no longer listening on port 3017.
listenSock.Close(10);

//  The first thing to do is to get the connected socket.
Chilkat.Socket sock = new Chilkat.Socket();
sock.LoadTaskResult(task);

//  Read the start line of the request..
string startLine = sock.ReceiveUntilMatch("\r\n");
if (sock.LastMethodSuccess != true) {
    Console.WriteLine(sock.LastErrorText);
    return;
}

//  Read the request header.
string requestHeader = sock.ReceiveUntilMatch("\r\n\r\n");
if (sock.LastMethodSuccess != true) {
    Console.WriteLine(sock.LastErrorText);
    return;
}

//  The browser SHOULD be sending us a GET request, and therefore there is no body to the request.
//  Once the request header is received, we have all of it.
//  We can now send our HTTP response.
Chilkat.StringBuilder sbResponseHtml = new Chilkat.StringBuilder();
sbResponseHtml.Append("<html><body><p>Chilkat thanks you!</b></body</html>");

Chilkat.StringBuilder sbResponse = new Chilkat.StringBuilder();
sbResponse.Append("HTTP/1.1 200 OK\r\n");
sbResponse.Append("Content-Length: ");
sbResponse.AppendInt(sbResponseHtml.Length);
sbResponse.Append("\r\n");
sbResponse.Append("Content-Type: text/html\r\n");
sbResponse.Append("\r\n");
sbResponse.AppendSb(sbResponseHtml);

sock.SendString(sbResponse.GetAsString());
sock.Close(50);

//  The information we need is in the startLine.
//  For example, the startLine will look like this:
//   GET /?oauth_token=abcdRQAAZZAAxfBBAAABVabcd_k&oauth_verifier=9rdOq5abcdCe6cn8M3jabcdj3Eabcd HTTP/1.1
Chilkat.StringBuilder sbStartLine = new Chilkat.StringBuilder();
sbStartLine.Append(startLine);
int numReplacements = sbStartLine.Replace("GET /?","");
numReplacements = sbStartLine.Replace(" HTTP/1.1","");
sbStartLine.Trim();

//  oauth_token=qyprdP04IrTDIXtP1HRZz0geQdjXHVlGDxXPexlXZsjZNRcY&oauth_verifier=arx5pj5&realmId=193514465596199&dataSource=QBO
Console.WriteLine("startline: " + sbStartLine.GetAsString());

hashTab1.Clear();
hashTab1.AddQueryParams(sbStartLine.GetAsString());

requestToken = hashTab1.LookupStr("oauth_token");
string authVerifier = hashTab1.LookupStr("oauth_verifier");

//  ------------------------------------------------------------------------------
//  Finally , we must exchange the OAuth Request Token for an OAuth Access Token.

http.OAuthToken = requestToken;
http.OAuthVerifier = authVerifier;
resp = http.PostUrlEncoded(accessTokenUrl,req);
if (http.LastMethodSuccess != true) {
    Console.WriteLine(http.LastErrorText);
    return;
}

//  Make sure a successful response was received.
if (resp.StatusCode != 200) {
    Console.WriteLine(resp.StatusLine);
    Console.WriteLine(resp.Header);
    Console.WriteLine(resp.BodyStr);
    return;
}

//  If successful, the resp.BodyStr contains something like this:
//  oauth_token=12347455-ffffrrlaBdCjbdGfyjZabcdb5APNtuTPNabcdEpp&oauth_token_secret=RxxxxJ8mTzUhwES4xxxxuJyFWDN8ZfHmrabcddh88LmWE
Console.WriteLine(resp.BodyStr);

Chilkat.Hashtable hashTab2 = new Chilkat.Hashtable();
hashTab2.AddQueryParams(resp.BodyStr);

string accessToken = hashTab2.LookupStr("oauth_token");
string accessTokenSecret = hashTab2.LookupStr("oauth_token_secret");

//  The access token + secret is what should be saved and used for
//  subsequent REST API calls.
Console.WriteLine("Access Token = " + accessToken);
Console.WriteLine("Access Token Secret = " + accessTokenSecret);

//  Save this access token for future calls.
Chilkat.JsonObject json = new Chilkat.JsonObject();
json.AppendString("oauth_token",accessToken);
json.AppendString("oauth_token_secret",accessTokenSecret);

//  Also save the realmId and dataSource from hashTab1.
string realmId = hashTab1.LookupStr("realmId");
Console.WriteLine("realmId = " + realmId);
string dataSource = hashTab1.LookupStr("dataSource");
Console.WriteLine("dataSource = " + dataSource);

json.AppendString("realmId",realmId);
json.AppendString("dataSource",dataSource);

Chilkat.FileAccess fac = new Chilkat.FileAccess();
fac.WriteEntireTextFile("qa_data/tokens/quickbooks.json",json.Emit(),"utf-8",false);

Console.WriteLine("Success.");

 

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