VB.NET

Example: Http.HttpJson method - Send a POST with JSON Body

See more HTTP Examples

Demonstrates how to call the HttpJson method, which sends an HTTP POST with a JSON body. This example sends the following request:

POST /echo_request_body.asp HTTP/1.1
Host: chilkatsoft.com
Accept: */*
Accept-Encoding: gzip
Content-Type: application/json
Content-Length: 26

{"greeting":"Hello World"}

Also see: Chilkat Http Default and Auto-Filled Headers

VB.NET

Dim success As Boolean = False

Dim http As New Chilkat.Http
success = False

Dim json As New Chilkat.JsonObject

' Build the following JSON:  {"greeting":"Hello World"}
json.UpdateString("greeting","Hello World")

' This URL echoes the contents of the request body, letting us view it.
Dim url As String = "https://chilkatsoft.com/echo_request_body.asp"

' Send a POST with the JSON in the HTTP request body.
Dim resp As New Chilkat.HttpResponse
success = http.HttpJson("POST",url,json,"application/json",resp)
If (success = False) Then
    Debug.WriteLine(http.LastErrorText)
    Exit Sub
End If


Debug.WriteLine("Response Status Code: " & resp.StatusCode)

' Examine the request we sent.
' The LastHeader property stores the HTTP request header of the most recent request sent,
' and in this instance, the response body mirrors the request body.
Debug.WriteLine(http.LastHeader)
Debug.WriteLine(resp.BodyStr)

' Output:

' POST /echo_request_body.asp HTTP/1.1
' Host: chilkatsoft.com
' Accept: */*
' Accept-Encoding: gzip
' Content-Type: application/json
' Content-Length: 26
' 
' {"greeting":"Hello World"}