I created a console program on visual basic asp.net that sends a generated email through a post API call. I was successful in sending an email to any recipient email using a godaddy domain through sendgrid. On this domain godaddy, I set up a proofpoint encryption attachment that should create encrypted emails through a trigger of putting "[encrypt]" in the subject line. However, it did not trigger because for the encryption to be automatically attached to the email it has to pass through the office 365 server. Since I am using sendgrid according to the workflow it doesn't go through outlook whatsoever:
https://sendgrid.com/docs/ui/sending-email/email-flow/
I have been doing research and I see send sendgrid supports end-to-end encryption with TLS. However, I cannot find anywhere how to establish this encryption with sendgrid and visual basic API calls. This program is for a medical diagnostic company, who will be sending patient information via email, to maintain HIPPA compliance the emails must be encrypted in some way. Here is the code:
Private Sub SendEmail(PARAMETERS_FOR_AUTOMATING_EMAIL)
Try
System.Net.ServicePointManager.SecurityProtocol = System.Net.SecurityProtocolType.Tls12
Dim uri As String = "https://api.sendgrid.com/v3/mail/send"
Dim Request As WebRequest = WebRequest.CreateHttp(uri)
Request.Method = "POST"
Request.PreAuthenticate = True
Request.Headers.Add("Authorization", "Bearer API_KEY")
Dim json_data As String = "{""personalizations"": [{""To"": [{""email"": ""TO_EMAIL""}]}],""from"": {""email"": ""FROM_EMAIL""},""subject"":""[Encrypt]This is a automated report"",""content"": [{""type"": ""text/html"",""value"": ""Hello!,<br>Please find attachment.""}], ""attachments"": [{""content"": ""File_translated_to_64_encoded"", ""type"": ""EXCEL_MIME"", ""filename"": ""FILE_NAME_FOR_ATTACHMENT""}]}}"
Request.ContentType = "application/json"
Dim json_bytes() As Byte = Encoding.UTF8.GetBytes(json_data)
Request.ContentLength = json_bytes.Length
Using requeststream = Request.GetRequestStream
requeststream.Write(json_bytes, 0, json_bytes.Length)
End Using
Dim responsecontent As String = Nothing
Using Response = DirectCast(Request.GetResponse, HttpWebResponse),
responseStream = Response.GetResponseStream()
Using reader = New StreamReader(responseStream)
responsecontent = reader.ReadToEnd()
End Using
End Using
Catch ex As Exception
ErrLog(ex, currentLocID)
End Try
End Sub
If you guys have any ideas to give me a solution please share! thank you in advance.
Related
I'm trying to upload a file from an FTP site to Basecamp using the Basecamp API. I'm using a simple console application. Here's my code:
Try
Dim accountID As String = ConfigurationManager.AppSettings("BaseCampID")
Dim projectID As Integer = 9999999
Dim folderName As String = "XXXXX/XXXXX"
Dim fileName As String = "XXX.zip"
'The URL to access the attachment method of the API
Dim apiURL = String.Format("https://basecamp.com/{0}/api/v1/projects/{1}/attachments.json", accountID, projectID)
'Get the file from the FTP server as a byte array
Dim fileBytes As Byte() = GetFileBytes(String.Format("{0}\\{1}", folderName, fileName))
'Initialize the WebClient object
Dim client As New WebClient()
client.Headers.Add("Content-Type", "application/zip")
'Need to provide a user-agent with a URL or email address
client.Headers.Add("User-Agent", "Basecamp Upload (email#email.com)")
'Keep the connection alive so it doesn't close
client.Headers.Add("Keep-Alive", "true")
'Provide the Basecamp credentials
client.Credentials = New NetworkCredential("username", "password")
'Upload the file as a byte array to the API, and get the response
Dim responseStr As Byte() = client.UploadData(apiURL, "POST", fileBytes)
'Convert the JSON response to a BaseCampAttachment object
Dim attachment As BaseCampAttachment
attachment = JSonHelper.FromJSon(Of BaseCampAttachment)(Encoding.Default.GetString(responseStr))
Catch ex As Exception
Console.WriteLine(ex.Message)
Finally
Console.ReadLine()
End Try
But whenever it calls client.UploadData, I get the error message "The underlying connection was closed: The connection was closed unexpectedly." I ran into this issue earlier and thought I solved it by adding the "Keep-Alive" header, but it's not working anymore. The API works if I upload a local file with client.UploadFile, but I'd like to just upload the file from they byte array from the FTP rather than downloading the file locally then uploading it to Basecamp.
Any thoughts would be greatly appreciated. Thanks!
I never figured out what was wrong with the WebClient call, but I ended up using a Basecamp API wrapper from https://basecampwrapper.codeplex.com. That wrapper uses HTTPRequest and HTTPResponse instead of WebClient.UploadData. It's also much easier to just use that wrapper than to try writing my own code from scratch.
I created http request application to test my web site qulatiy (see below).
Dim Request As HttpWebRequest = WebRequest.Create(webAddress)
Dim Response As HttpWebResponse = Request.GetResponse()
Request.Method = "Get"
Dim Reader As New StreamReader(Response.GetResponseStream)
Dim Html As String = Reader.ReadToEnd()
In this case, I would like to create anonymous request without catching the response. How can I do that?
To do so, u have to get a little low level , working with sockets
TcpCient in this case
Sample code
Imports System.Net.Sockets
Module Module1
Sub Main()
Dim tcpcli = New TcpClient()
tcpcli.Connect("google.co.in", 80)
Dim stream As NetworkStream = tcpcli.GetStream()
Dim reqdata As String = String.Format("GET / HTTP/1.1{0}Host: www.google.co.in{0}Connection: Close{0}{0}", vbCrLf)
Dim reqbytes() As Byte = Text.Encoding.ASCII.GetBytes(reqdata)
stream.Write(reqbytes, 0, reqbytes.Length)
stream.Close()
stream.Dispose()
tcpcli.Close()
End Sub
End Module
Network capture via wireshark (no response received)
You can make a web request anonymously by using ProxySharp. It basically makes the web request behind a random vpn each time. This makes it look like the request is coming from a different IP address on each request.
I'm new to WebRequest authentication and have been researching how to authenticate w/ a couple websites to pull some excel data from them. Couple things I'm confused about is
a.) how to properly read a log from Fiddler (using this to pick up get/post data from the website authentication)
b.) how do use the data from Fiddler to program the VB.NET WebRequest properly.
I've been able to authenticate w/ websites that use simple authentication HTTPS, but any site that does any redirects/REST/cookie auth I'm lost...
Let me know if I can provide anymore detail.
Dim req As Net.HttpWebRequest = Net.WebRequest.Create(Url)
If Not Login = Nothing AndAlso Not Password = Nothing Then
Dim myCache As New System.Net.CredentialCache()
myCache.Add(New Uri(Url), "Basic", New System.Net.NetworkCredential(Login, Password))
req.Credentials = myCache
End If
Dim sr As New StreamReader(req.GetResponse().GetResponseStream())
Dim ss as string = sr.ReadToEnd
'Save it as excel & close stream
sr.Close()
I'm a newbie about web services in VB.NET. I'm making a desktop application that will talk to JIRA (http://www.atlassian.com/software/jira/). They provided a REST api that I decided to use. The first step is to login which they say that...
"To log in to JIRA, you need to POST a username and password in JSON format..."
{"username" : "admin", "password" : "admin"}
to this url...
https://addressgoeshere (we are using https)
Can someone provide me a sample code to do this so I can have a guide and a good start?
Here is the code to post json effectively. The variable res is able to give you the responce to your query
remember to import
System.Net
System.IO
System.text
by using
Imports
and then the import names
to bypass expired ssl certificate check this: http://blog.jameshiggs.com/2008/05/01/c-how-to-accept-an-invalid-ssl-certificate-programmatically/
Private Function SendRequest(uri As Uri, jsonDataBytes As Byte(), contentType As String, method As String) As String
Dim response As String
Dim request As WebRequest
request = WebRequest.Create(uri)
request.ContentLength = jsonDataBytes.Length
request.ContentType = contentType
request.Method = method
Using requestStream = request.GetRequestStream
requestStream.Write(jsonDataBytes, 0, jsonDataBytes.Length)
requestStream.Close()
Using responseStream = request.GetResponse.GetResponseStream
Using reader As New StreamReader(responseStream)
response = reader.ReadToEnd()
End Using
End Using
End Using
Return response
End Function
to use this function
Dim data = Encoding.UTF8.GetBytes(jsonSring)
Dim result_post = SendRequest(uri, data, "application/json", "POST")
--EDIT--
The linked page has expired by now. Here is a working archived copy:
https://web.archive.org/web/20110924191356/http://blog.jameshiggs.com/2008/05/01/c-how-to-accept-an-invalid-ssl-certificate-programmatically/
For 'The underlying connection was closed:' error include these 2 lines of code after the line ...WebRequest.Create(Url) -it should work
System.Net.ServicePointManager.UseNagleAlgorithm = False
System.Net.ServicePointManager.Expect100Continue = False
Trying to download file in code.
Current code:
Dim uri As New UriBuilder
uri.UserName = "xxx"
uri.Password = "xxx"
uri.Host = "xxx"
uri.Path = "xxx.aspx?q=65"
Dim request As HttpWebRequest = DirectCast(WebRequest.Create(uri.Uri), HttpWebRequest)
request.AllowAutoRedirect = True
request = DirectCast(WebRequest.Create(DownloadUrlIn), HttpWebRequest)
request.Timeout = 10000
'request.AllowWriteStreamBuffering = True
Dim response As HttpWebResponse = Nothing
response = DirectCast(request.GetResponse(), HttpWebResponse)
Dim s As Stream = response.GetResponseStream()
'Write to disk
Dim fs As New FileStream("c:\xxx.pdf", FileMode.Create)
Dim read As Byte() = New Byte(255) {}
Dim count As Integer = s.Read(read, 0, read.Length)
While count > 0
fs.Write(read, 0, count)
count = s.Read(read, 0, read.Length)
End While
'Close everything
fs.Close()
s.Close()
response.Close()
Running this code and checking the response.ResponseUri indicates im being redirected back to the login page and not to the pdf file.
For some reason its not authorising access what could I be missing as Im sending the user name and password in the uri? Thanks for your help
You don't need all of that code to download a file from the net
just use the WebClient class and its DownloadFile method
you should check and see if the site requires cookies (most do), i'd use a packet analyzer and run your code and see exactly what the server is returning. use fiddler or http analyzer to log packets
With UWP, this has become a more pertinent question as UWP does not have a WebClient. The correct answer to this question is if you are being re-directed to the login page, then there must be an issue with your credentials OR the setting (or lack of) header for the HttpWebRequest.
According to Microsoft, the request for downloading is sent with the call to GetResponse() on the HttpWebRequest, therefore the downloaded file SHOULD be in the stream in the response (returned by the GetResponse() call mentioned above).