(PowerBuilder) Creating an application/json HTTP POST Request

Demonstrates how to create an HTTP POST request having the Content-Type application/json, where the body of the HTTP request is the following JSON:

{
   "username" : "my_username",
   "password" : "my_password",
   "validation-factors" : {
      "validationFactors" : [
         {
            "name" : "remote_address",
            "value" : "127.0.0.1"
         }
      ]
   }
}

The generated HTTP request looks like this:

POST /something HTTP/1.1
Content-Type: application/json
Accept: application/json
Host: domain
Content-Length: 216

{
  "username": "my_username",
  "password": "my_password",
  "validation-factors": {
    "validationFactors": [
      {
        "name": "remote_address",
        "value": "127.0.0.1"
      }
    ]
  }
}

Note: This example requires Chilkat v11.1.0 or greater.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

integer li_rc
oleobject loo_Req
oleobject loo_Json
oleobject loo_VFactors
oleobject loo_VArray
oleobject loo_FactorObj
string ls_RequestMime

// This example demonstrates building an application/json request.

loo_Req = create oleobject
li_rc = loo_Req.ConnectToNewObject("Chilkat.HttpRequest")
if li_rc < 0 then
    destroy loo_Req
    MessageBox("Error","Connecting to COM object failed")
    return
end if

// The ContentType, HttpVerb, and Path properties should
// always be explicitly set.
loo_Req.HttpVerb = "POST"
loo_Req.Path = "/something"
loo_Req.ContentType = "application/json"

// We may wish to add an "Accept" header to the request.
// This tells the server we'll accept an application/json response.
loo_Req.AddHeader("Accept","application/json")

// We'll use Chilkat's JSON API to create the JSON body of the HTTP request.
loo_Json = create oleobject
li_rc = loo_Json.ConnectToNewObject("Chilkat.JsonObject")

loo_Json.AppendString("username","my_username")
loo_Json.AppendString("password","my_password")

loo_VFactors = create oleobject
li_rc = loo_VFactors.ConnectToNewObject("Chilkat.JsonObject")

loo_Json.AppendObject2("validation-factors",loo_VFactors)

loo_VArray = create oleobject
li_rc = loo_VArray.ConnectToNewObject("Chilkat.JsonArray")

loo_VFactors.AppendArray2("validationFactors",loo_VArray)

loo_FactorObj = create oleobject
li_rc = loo_FactorObj.ConnectToNewObject("Chilkat.JsonObject")

loo_VArray.AddObjectAt2(0,loo_FactorObj)
loo_FactorObj.AppendString("name","remote_address")
loo_FactorObj.AppendString("value","127.0.0.1")

// Use the JSON for the HTTP request body
// By default, the Emit method will output compact JSON.
// This is best for generating the smallest size request.
// To generate a more human-readable (pretty-printed) JSON request body,
// set the EmitCompact property to FALSE
loo_Json.EmitCompact = 0
loo_Req.LoadBodyFromString(loo_Json.Emit(),"utf-8")

// View the request that would be sent if HttpSReq was called:
ls_RequestMime = loo_Req.GenerateRequestText()
Write-Debug ls_RequestMime

// A few important comments about the HTTP request that is generated:
// 
// 1) The Content-Length header is automatically generated based on the actual length of the MIME message
//    that follows the intial (topmost) MIME header.
// 2) The HOST header will automatically get filled in with the actual domain when HttpSReq
//    is called


destroy loo_Req
destroy loo_Json
destroy loo_VFactors
destroy loo_VArray
destroy loo_FactorObj