(C# UWP/WinRT) Debug REST HTTP Request

Demonstrates how to generate the HTTP Request (with all headers intact) without actually sending the request.

Note: This example requires Chilkat v9.5.0.77 or later.

Chilkat Universal Windows Platform (UWP) / WinRT Downloads Chilkat for the Universal Windows Platform (UWP)

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

// This example will connect to the web server, but does not actually send a request.
// When in DebugMode, the request is composed in memory and can be retrieved by calling
// GetLastDebugRequest.

Chilkat.Rest rest = new Chilkat.Rest();

// Connect Code...
// URL: https://test-api.service.hmrc.gov.uk/organisations/vat/MY_HMRC_VRN/returns
bool bTls = true;
int port = 443;
bool bAutoReconnect = true;
bool success = await rest.ConnectAsync("test-api.service.hmrc.gov.uk",port,bTls,bAutoReconnect);
if (success != true) {
    Debug.WriteLine("ConnectFailReason: " + Convert.ToString(rest.ConnectFailReason));
    Debug.WriteLine(rest.LastErrorText);
    return;
}

// Build the request body...
Chilkat.JsonObject json = new Chilkat.JsonObject();
json.UpdateString("periodKey","A001");
json.UpdateNumber("vatDueSales","105.50");
json.UpdateNumber("vatDueAcquisitions","-100.45");
json.UpdateNumber("totalVatDue","5.05");
json.UpdateNumber("vatReclaimedCurrPeriod","105.15");
json.UpdateNumber("netVatDue","100.10");
json.UpdateInt("totalValueSalesExVAT",300);
json.UpdateInt("totalValuePurchasesExVAT",300);
json.UpdateInt("totalValueGoodsSuppliedExVAT",3000);
json.UpdateInt("totalAcquisitionsExVAT",3000);
json.UpdateBool("finalised",true);

// Add Headers...
rest.AddHeader("Accept","application/vnd.hmrc.1.0+json");
rest.AddHeader("Authorization","Bearer HMRC_ACCESS_TOKEN");
rest.AddHeader("Content-Type","application/json");

Chilkat.StringBuilder sbRequestBody = new Chilkat.StringBuilder();
json.EmitSb(sbRequestBody);

// Set DebugMode so that no request is actually sent.
rest.DebugMode = true;

Chilkat.StringBuilder sbResponseBody = new Chilkat.StringBuilder();
success = await rest.FullRequestSbAsync("POST","/organisations/vat/MY_HMRC_VRN/returns",sbRequestBody,sbResponseBody);
if (success != true) {
    Debug.WriteLine(rest.LastErrorText);
    return;
}

// Get the exact contents of what would've been sent.
// This includes the HTTP start line, the HTTP request headers, and the request body.
// Given that it's possible for the request body to contain binary data,
// the GetLastDebugRequest fetches into a BinData object.
// In this case, however, our request body contained JSON, so we can
// examine it as a string..
Chilkat.BinData bdRequest = new Chilkat.BinData();
success = rest.GetLastDebugRequest(bdRequest);

Debug.WriteLine("----");
Debug.WriteLine(bdRequest.GetString("utf-8"));
Debug.WriteLine("----");

// The output for the above case:

// POST /organisations/vat/MY_HMRC_VRN/returns HTTP/1.1
// Accept: application/vnd.hmrc.1.0+json
// Host: test-api.service.hmrc.gov.uk
// Authorization: Bearer HMRC_ACCESS_TOKEN
// Content-Type: application/json
// Content-Length: 281
// 
// {"periodKey":"A001","vatDueSales":105.50, ... ,"finalised":true}
// 
//