Chilkat Examples

ChilkatHOMEAndroid™Classic ASPCC++C#Mono C#.NET Core C#C# UWP/WinRTDataFlexDelphi ActiveXDelphi DLLVisual FoxProJavaLianjaMFCObjective-CPerlPHP ActiveXPHP ExtensionPowerBuilderPowerShellPureBasicCkPythonChilkat2-PythonRubySQL ServerSwift 2Swift 3/4TclUnicode CUnicode C++Visual Basic 6.0VB.NETVB.NET UWP/WinRTVBScriptXojo PluginNode.jsExcelGo

Visual Basic 6.0 Examples

ASN.1
Amazon S3
Amazon S3 (new)
Amazon SES
Amazon SNS
Amazon SQS
Async
Azure Cloud Storage
Azure Service Bus
Base64
Bounced Email
Box
CSR
CSV
Certificates
Compression
DKIM / DomainKey
DSA
Diffie-Hellman
Digital Signatures
Dropbox
Dynamics CRM
ECC
Email Object
Encryption
FTP
Facebook
FileAccess
Firebase
GMail REST API
GeoOp
Google APIs
Google Calendar
Google Cloud Storage
Google Drive
Google Sheets
Gzip
HTML-to-XML/Text
HTTP
HTTP Misc
IMAP
JSON
JSON Web Encryption (JWE)
JSON Web Signatures (JWS)
JSON Web Token (JWT)

Java KeyStore (JKS)
Jira
MHT / HTML Email
MIME
Microsoft Graph
NTLM
OAuth1
OAuth2
OneDrive
OpenSSL
Outlook
PEM
PFX/P12
POP3
PRNG
PayPal
Peoplevox
QuickBooks
REST
REST Misc
RSA Encryption
SCP
SFTP
SMTP
SSH
SSH Key
SSH Tunnel
SharePoint
Shopify
Socket/SSL/TLS
Spider
Stream
Stripe
SugarCRM
Tar Archive
Twitter
Upload
VoiceBase
Walmart
WebSocket
XAdES
XML
XML Digital Signatures
XMP
Xero
Zip
curl
eBay

 

 

 

(Visual Basic 6.0) Twitter OAuth1 Authorization (3-legged)

Demonstrates 3-legged OAuth1 authorization for Twitter.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

Dim consumerKey As String
consumerKey = "TWITTER_CONSUMER_KEY"
Dim consumerSecret As String
consumerSecret = "TWITTER_CONSUMER_SECRET"

Dim requestTokenUrl As String
requestTokenUrl = "https://api.twitter.com/oauth/request_token"
Dim authorizeUrl As String
authorizeUrl = "https://api.twitter.com/oauth/authorize"
Dim accessTokenUrl As String
accessTokenUrl = "https://api.twitter.com/oauth/access_token"

'  The port number is picked at random. It's some unused port that won't likely conflict with anything else..
Dim callbackUrl As String
callbackUrl = "http://localhost:3017/"
Dim callbackLocalPort As Long
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
Dim http As New ChilkatHttp
Dim success As Long

http.OAuth1 = 1
http.OAuthConsumerKey = consumerKey
http.OAuthConsumerSecret = consumerSecret
http.OAuthCallback = callbackUrl

Dim req As New ChilkatHttpRequest
Dim resp As ChilkatHttpResponse
Set resp = http.PostUrlEncoded(requestTokenUrl,req)
If (http.LastMethodSuccess <> 1) Then
    Debug.Print http.LastErrorText
    Exit Sub
End If

'  If successful, the resp.BodyStr contains something like this:
'  oauth_token=-Wa_KwAAAAAAxfEPAAABV8Qar4Q&oauth_token_secret=OfHY4tZBX2HK4f7yIw76WYdvnl99MVGB&oauth_callback_confirmed=true
Debug.Print resp.BodyStr

Dim hashTab As New ChilkatHashtable
success = hashTab.AddQueryParams(resp.BodyStr)

Dim requestToken As String
requestToken = hashTab.LookupStr("oauth_token")
Dim requestTokenSecret As String
requestTokenSecret = hashTab.LookupStr("oauth_token_secret")
http.OAuthTokenSecret = requestTokenSecret

Debug.Print "oauth_token = " & requestToken
Debug.Print "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.
Dim sbUrlForBrowser As New ChilkatStringBuilder
success = sbUrlForBrowser.Append(authorizeUrl)
success = sbUrlForBrowser.Append("?oauth_token=")
success = sbUrlForBrowser.Append(requestToken)
Dim urlForBrowser As String
urlForBrowser = sbUrlForBrowser.GetAsString()

'  When the urlForBrowser is loaded into a browser, the response from Twitter 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.
Dim listenSock As New ChilkatSocket

Dim backLog As Long
backLog = 5
success = listenSock.BindAndListen(callbackLocalPort,backLog)
If (success <> 1) Then
    Debug.Print listenSock.LastErrorText
    Exit Sub
End If

'  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.
Dim maxWaitMs As Long
maxWaitMs = 60000
Dim task As ChilkatTask
Set task = listenSock.AcceptNextConnectionAsync(maxWaitMs)
success = 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 Twitter 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 (Not success Or (task.StatusInt <> 7) Or (task.TaskSuccess <> 1)) Then
    If (Not success) Then
        '  The task.LastErrorText applies to the Wait method call.
        Debug.Print task.LastErrorText
    Else
        '  The ResultErrorText applies to the underlying task method call (i.e. the AcceptNextConnection)
        Debug.Print task.Status
        Debug.Print task.ResultErrorText
    End If

    Exit Sub
End If

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

'  We no longer need the listen socket...
'  Stop listening on port 3017.
success = listenSock.Close(10)

'  First get the connected socket.
Dim sock As New ChilkatSocket
success = sock.LoadTaskResult(task)

'  Read the start line of the request..
Dim startLine As String
startLine = sock.ReceiveUntilMatch(vbCrLf)
If (sock.LastMethodSuccess <> 1) Then
    Debug.Print sock.LastErrorText
    Exit Sub
End If

'  Read the request header.
Dim requestHeader As String
requestHeader = sock.ReceiveUntilMatch(vbCrLf & vbCrLf)
If (sock.LastMethodSuccess <> 1) Then
    Debug.Print sock.LastErrorText
    Exit Sub
End If

'  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.
Dim sbResponseHtml As New ChilkatStringBuilder
success = sbResponseHtml.Append("<html><body><p>Chilkat thanks you!</b></body</html>")

Dim sbResponse As New ChilkatStringBuilder
success = sbResponse.Append("HTTP/1.1 200 OK" & vbCrLf)
success = sbResponse.Append("Content-Length: ")
success = sbResponse.AppendInt(sbResponseHtml.Length)
success = sbResponse.Append(vbCrLf)
success = sbResponse.Append("Content-Type: text/html" & vbCrLf)
success = sbResponse.Append(vbCrLf)
success = sbResponse.AppendSb(sbResponseHtml)

success = sock.SendString(sbResponse.GetAsString())
success = 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
Dim sbStartLine As New ChilkatStringBuilder
success = sbStartLine.Append(startLine)
Dim numReplacements As Long
numReplacements = sbStartLine.Replace("GET /?","")
numReplacements = sbStartLine.Replace(" HTTP/1.1","")
success = sbStartLine.Trim()

'  oauth_token=abcdRQAAZZAAxfBBAAABVabcd_k&oauth_verifier=9rdOq5abcdCe6cn8M3jabcdj3Eabcd
Debug.Print "startline: " & sbStartLine.GetAsString()

hashTab.Clear 
success = hashTab.AddQueryParams(sbStartLine.GetAsString())

requestToken = hashTab.LookupStr("oauth_token")
Dim authVerifier As String
authVerifier = hashTab.LookupStr("oauth_verifier")

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

http.OAuthToken = requestToken
http.OAuthVerifier = authVerifier
Set resp = http.PostUrlEncoded(accessTokenUrl,req)
If (http.LastMethodSuccess <> 1) Then
    Debug.Print http.LastErrorText
    Exit Sub
End If

'  Make sure a successful response was received.
If (resp.StatusCode <> 200) Then
    Debug.Print resp.StatusLine
    Debug.Print resp.Header
    Debug.Print resp.BodyStr
    Exit Sub
End If

'  If successful, the resp.BodyStr contains something like this:
'  oauth_token=85123455-fF41296Bi3daM8eCo9Y5vZabcdxXpRv864plYPOjr&oauth_token_secret=afiYJOgabcdSfGae7BDvJVVTwys8fUGpra5guZxbmFBZo&user_id=85612355&screen_name=chilkatsoft&x_auth_expires=0
Debug.Print resp.BodyStr

hashTab.Clear 
success = hashTab.AddQueryParams(resp.BodyStr)

Dim accessToken As String
accessToken = hashTab.LookupStr("oauth_token")
Dim accessTokenSecret As String
accessTokenSecret = hashTab.LookupStr("oauth_token_secret")
Dim userId As String
userId = hashTab.LookupStr("user_id")
Dim screenName As String
screenName = hashTab.LookupStr("screen_name")

'  The access token + secret is what should be saved and used for
'  subsequent REST API calls.
Debug.Print "Access Token = " & accessToken
Debug.Print "Access Token Secret = " & accessTokenSecret
Debug.Print "user_id = " & userId
Debug.Print "screen_name  = " & screenName

'  Save this access token for future calls.
'  Just in case we need user_id and screen_name, save those also..
Dim json As New ChilkatJsonObject
success = json.AppendString("oauth_token",accessToken)
success = json.AppendString("oauth_token_secret",accessTokenSecret)
success = json.AppendString("user_id",userId)
success = json.AppendString("screen_name",screenName)

Dim fac As New CkFileAccess
success = fac.WriteEntireTextFile("qa_data/tokens/twitter.json",json.Emit(),"utf-8",0)

Debug.Print "Success."

 

© 2000-2016 Chilkat Software, Inc. All Rights Reserved.