Chilkat Online Tools

BatchDetectKeyPhrases VB.NET Example

Amazon Comprehend

' This example requires the Chilkat API to have been previously unlocked.
' See Global Unlock Sample for sample code.

Dim rest As New Chilkat.Rest
Dim success As Boolean

Dim authAws As New Chilkat.AuthAws
authAws.AccessKey = "AWS_ACCESS_KEY"
authAws.SecretKey = "AWS_SECRET_KEY"

' Don't forget to change the region to your particular region. (Also make the same change in the call to Connect below.)
authAws.Region = "us-west-2"
authAws.ServiceName = "comprehend"
' SetAuthAws causes Chilkat to automatically add the following headers: Authorization, X-Amz-Date
rest.SetAuthAws(authAws)

' URL: https://comprehend.us-west-2.amazonaws.com/
' Use the same region as specified above.
success = rest.Connect("comprehend.us-west-2.amazonaws.com",443,True,True)
If (success <> True) Then
    Debug.WriteLine("ConnectFailReason: " & rest.ConnectFailReason)
    Debug.WriteLine(rest.LastErrorText)
    Exit Sub
End If


' The following code creates the JSON request body.
' The JSON created by this code is shown below.

' Use this online tool to generate code from sample JSON:
' Generate Code to Create JSON

Dim json As New Chilkat.JsonObject
json.UpdateString("LanguageCode","string")
json.UpdateString("TextList[0]","string")

' The JSON request body created by the above code:

' {
'   "LanguageCode": "string",
'   "TextList": [
'     "string"
'   ]
' }

rest.AddHeader("Content-Type","application/x-amz-json-1.1")
rest.AddHeader("X-Amz-Target","Comprehend_20171127.BatchDetectKeyPhrases")

Dim sbRequestBody As New Chilkat.StringBuilder
json.EmitSb(sbRequestBody)
Dim sbResponseBody As New Chilkat.StringBuilder
success = rest.FullRequestSb("POST","/",sbRequestBody,sbResponseBody)
If (success <> True) Then
    Debug.WriteLine(rest.LastErrorText)
    Exit Sub
End If

Dim respStatusCode As Integer = rest.ResponseStatusCode
Debug.WriteLine("response status code = " & respStatusCode)
If (respStatusCode <> 200) Then
    Debug.WriteLine("Response Header:")
    Debug.WriteLine(rest.ResponseHeader)
    Debug.WriteLine("Response Body:")
    Debug.WriteLine(sbResponseBody.GetAsString())
    Exit Sub
End If


Dim jResp As New Chilkat.JsonObject
jResp.LoadSb(sbResponseBody)

' The following code parses the JSON response.
' A sample JSON response is shown below the sample code.

' Use this online tool to generate parsing code from sample JSON:
' Generate Parsing Code from JSON



Dim ErrorCode As String
Dim ErrorMessage As String
Dim Index As Integer
Dim j As Integer
Dim count_j As Integer
Dim BeginOffset As Integer
Dim EndOffset As Integer
Dim Score As Integer
Dim Text As String

Dim i As Integer = 0
Dim count_i As Integer = jResp.SizeOfArray("ErrorList")
While i < count_i
    jResp.I = i
    ErrorCode = jResp.StringOf("ErrorList[i].ErrorCode")
    ErrorMessage = jResp.StringOf("ErrorList[i].ErrorMessage")
    Index = jResp.IntOf("ErrorList[i].Index")
    i = i + 1
End While
i = 0
count_i = jResp.SizeOfArray("ResultList")
While i < count_i
    jResp.I = i
    Index = jResp.IntOf("ResultList[i].Index")
    j = 0
    count_j = jResp.SizeOfArray("ResultList[i].KeyPhrases")
    While j < count_j
        jResp.J = j
        BeginOffset = jResp.IntOf("ResultList[i].KeyPhrases[j].BeginOffset")
        EndOffset = jResp.IntOf("ResultList[i].KeyPhrases[j].EndOffset")
        Score = jResp.IntOf("ResultList[i].KeyPhrases[j].Score")
        Text = jResp.StringOf("ResultList[i].KeyPhrases[j].Text")
        j = j + 1
    End While
    i = i + 1
End While


' A sample JSON response body parsed by the above code:

' {
'   "ErrorList": [
'     {
'       "ErrorCode": "string",
'       "ErrorMessage": "string",
'       "Index": number
'     }
'   ],
'   "ResultList": [
'     {
'       "Index": number,
'       "KeyPhrases": [
'         {
'           "BeginOffset": number,
'           "EndOffset": number,
'           "Score": number,
'           "Text": "string"
'         }
'       ]
'     }
'   ]
' }