Unicode C++
Unicode C++
Generate an E-way Bill
See more HTTP Misc Examples
Demonstrates how to send an HTTP POST request to generate an e-way bill.Chilkat Unicode C++ Downloads
#include <CkJsonObjectW.h>
#include <CkCrypt2W.h>
#include <CkHttpW.h>
#include <CkHttpResponseW.h>
#include <CkStringBuilderW.h>
#include <CkBinDataW.h>
void ChilkatSample(void)
{
bool success = false;
// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.
// This example uses the previously obtained access token that was retrieved
// in this example: Get EWAY Auth Token using Gstin, username, password, and app_key
CkJsonObjectW jsonAuth;
success = jsonAuth.LoadFile(L"qa_data/tokens/ewayAuth.json");
if (success == false) {
wprintf(L"%s\n",jsonAuth.lastErrorText());
return;
}
// The jsonAuth contains something like this:
// {
// "authToken": "IBTeFtxNfVurg71LTzZ2r0xK7",
// "decryptedSek": "5g1TyTie7yoslU3DrbYATa7mWyPazlODE7cEh5Vy4Ho="
// }
// Generate the JSON data for the e-way bill.
// The following code can be generated by pasting representative JSON into this online tool:
// Generate JSON Code
CkJsonObjectW jsonData;
jsonData.UpdateString(L"supplyType",L"O");
jsonData.UpdateString(L"subSupplyType",L"1");
jsonData.UpdateString(L"docType",L"INV");
jsonData.UpdateString(L"docNo",L"AW1234-2");
jsonData.UpdateString(L"docDate",L"05/04/2018");
jsonData.UpdateString(L"fromGstin",L"09ABDC24212B1FK");
jsonData.UpdateString(L"fromTrdName",L"willy");
jsonData.UpdateString(L"fromAddr1",L"3RD CROSS NO 200 19 A");
jsonData.UpdateString(L"fromAddr2",L"GROUND FLOOR OZZY ROAD");
jsonData.UpdateString(L"fromPlace",L"BUSY TOWN");
jsonData.UpdateNumber(L"fromPincode",L"640033");
jsonData.UpdateNumber(L"actFromStateCode",L"05");
jsonData.UpdateNumber(L"fromStateCode",L"05");
jsonData.UpdateString(L"toGstin",L"01AAAASCC10BBBB");
jsonData.UpdateString(L"toTrdName",L"mthustra");
jsonData.UpdateString(L"toAddr1",L"Shrek Ogre");
jsonData.UpdateString(L"toAddr2",L"Basadronsil");
jsonData.UpdateString(L"toPlace",L"Grifl Blagar");
jsonData.UpdateNumber(L"toPincode",L"699988");
jsonData.UpdateNumber(L"actToStateCode",L"29");
jsonData.UpdateNumber(L"toStateCode",L"02");
jsonData.UpdateNumber(L"totalValue",L"5609889");
jsonData.UpdateNumber(L"cgstValue",L"0");
jsonData.UpdateNumber(L"sgstValue",L"0");
jsonData.UpdateNumber(L"igstValue",L"168296.67");
jsonData.UpdateNumber(L"cessValue",L"224395.56");
jsonData.UpdateString(L"transporterId",L"09ABDC24212B1FK");
jsonData.UpdateString(L"transporterName",L"");
jsonData.UpdateString(L"transDocNo",L"12332");
jsonData.UpdateNumber(L"transMode",L"1");
jsonData.UpdateString(L"transDistance",L"656");
jsonData.UpdateString(L"transDocDate",L"10/04/2018");
jsonData.UpdateString(L"vehicleNo",L"PBN4567");
jsonData.UpdateString(L"vehicleType",L"R");
jsonData.put_I(0);
jsonData.UpdateString(L"itemList[i].productName",L"Wheat");
jsonData.UpdateString(L"itemList[i].productDesc",L"Wheat");
jsonData.UpdateNumber(L"itemList[i].hsnCode",L"1001");
jsonData.UpdateNumber(L"itemList[i].quantity",L"4");
jsonData.UpdateString(L"itemList[i].qtyUnit",L"BOX");
jsonData.UpdateNumber(L"itemList[i].cgstRate",L"0");
jsonData.UpdateNumber(L"itemList[i].sgstRate",L"0");
jsonData.UpdateNumber(L"itemList[i].igstRate",L"3");
jsonData.UpdateNumber(L"itemList[i].cessRate",L"4");
jsonData.UpdateNumber(L"itemList[i].cessAdvol",L"0");
jsonData.UpdateNumber(L"itemList[i].taxableAmount",L"5609889");
// The body of the HTTP POST will contain JSON that looks like this:
// {
// "action":"GENEWAYBILL",
// "data": " iJiJGXq ... oUZp/25Y "
// }
// The "data" is the encrypted jsonData using our previously agreed-upon symmetric encryption key.
// Let's begin build the JSON request body..
CkJsonObjectW jsonRequestBody;
jsonRequestBody.UpdateString(L"action",L"GENEWAYBILL");
// Setup the encryptor using the decryptedSek from the jsonAuth
CkCrypt2W crypt;
crypt.put_CryptAlgorithm(L"aes");
crypt.put_CipherMode(L"ecb");
crypt.put_KeyLength(256);
crypt.SetEncodedKey(jsonAuth.stringOf(L"decryptedSek"),L"base64");
crypt.put_EncodingMode(L"base64");
// Encrypt the jsonData and add it to our JSON request body
jsonRequestBody.UpdateString(L"data",crypt.encryptStringENC(jsonData.emit()));
CkHttpW http;
// Add the authtoken to the request header.
// Be careful to be precise with uppercase/lowercase ("authtoken" vs "authToken")
http.SetRequestHeader(L"authtoken",jsonAuth.stringOf(L"authToken"));
http.SetRequestHeader(L"Gstin",L"09ABDC24212B1FK");
http.put_Accept(L"application/json");
// POST the request to generate an e-way bill:
CkHttpResponseW resp;
success = http.HttpJson(L"POST",L"http://ewb.wepgst.com/api/EWayBill",jsonRequestBody,L"application/json",resp);
if (success == false) {
wprintf(L"%s\n",http.lastErrorText());
return;
}
int respStatusCode = resp.get_StatusCode();
wprintf(L"response status code =%d\n",respStatusCode);
wprintf(L"response body:\n");
wprintf(L"%s\n",resp.bodyStr());
if (respStatusCode != 200) {
wprintf(L"Failed in some unknown way.\n");
return;
}
// When the response status code = 200, we'll have either
// success response like this:
// {"status":"1","data":"..."}
//
// or a failed response like this:
//
// {"status":"0","error":"eyJlcnJvckNvZGVzIjoiMTA4In0="}
// Load the response body into a JSON object.
CkJsonObjectW json;
json.Load(resp.bodyStr());
int status = json.IntOf(L"status");
wprintf(L"status = %d\n",status);
if (status != 1) {
// Failed. Base64 decode the error
// {"status":"0","error":"eyJlcnJvckNvZGVzIjoiMTA4In0="}
// For an invalid password, the error is: {"errorCodes":"108"}
CkStringBuilderW sbError;
json.StringOfSb(L"error",sbError);
sbError.Decode(L"base64",L"utf-8");
wprintf(L"error: %s\n",sbError.getAsString());
return;
}
json.put_EmitCompact(false);
wprintf(L"JSON response:\n");
wprintf(L"%s\n",json.emit());
CkBinDataW bdData;
bdData.AppendEncoded(json.stringOf(L"data"),L"base64");
crypt.DecryptBd(bdData);
// Decrypts to
// {"ewayBillNo":331001121234,"ewayBillDate":"24/05/2018 04:38:00 PM","validUpto":"31/05/2018 11:59:00 PM"}
CkJsonObjectW jsonBill;
jsonBill.Load(bdData.getString(L"utf-8"));
int ewayBillNo = jsonBill.IntOf(L"ewayBillNo");
wprintf(L"ewayBillNo = %d\n",ewayBillNo);
const wchar_t *ewayBillDate = jsonBill.stringOf(L"ewayBillDate");
wprintf(L"ewayBillDate = %s\n",ewayBillDate);
const wchar_t *validUpto = jsonBill.stringOf(L"validUpto");
wprintf(L"validUpto = %s\n",validUpto);
// Sample output:
// ewayBillNo = 331001121234
// ewayBillDate = 24/05/2018 04:55:00 PM
// validUpto = 31/05/2018 11:59:00 PM
}