(C) 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"
      }
    ]
  }
}

Chilkat C/C++ Library Downloads
MS Visual C/C++ Linux/CentOS C/C++ Alpine Linux C/C++ MAC OS X C/C++	armhf/aarch64 C/C++ C++ Builder iOS C/C++ Android C/C++	Solaris C/C++ MinGW C/C++

#include <C_CkHttpRequest.h>
#include <C_CkJsonObject.h>
#include <C_CkJsonArray.h>

void ChilkatSample(void)
    {
    HCkHttpRequest req;
    HCkJsonObject json;
    HCkJsonObject vFactors;
    HCkJsonArray vArray;
    HCkJsonObject factorObj;
    const char *requestMime;

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

    req = CkHttpRequest_Create();

    // The ContentType, HttpVerb, and Path properties should
    // always be explicitly set.
    CkHttpRequest_putHttpVerb(req,"POST");
    CkHttpRequest_putPath(req,"/something");
    CkHttpRequest_putContentType(req,"application/json");

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

    // We'll use Chilkat's JSON API to create the JSON body of the HTTP request.
    json = CkJsonObject_Create();
    CkJsonObject_AppendString(json,"username","my_username");
    CkJsonObject_AppendString(json,"password","my_password");
    vFactors = CkJsonObject_AppendObject(json,"validation-factors");
    vArray = CkJsonObject_AppendArray(vFactors,"validationFactors");
    CkJsonArray_AddObjectAt(vArray,0);
    factorObj = CkJsonArray_ObjectAt(vArray,0);
    CkJsonObject_AppendString(factorObj,"name","remote_address");
    CkJsonObject_AppendString(factorObj,"value","127.0.0.1");
    CkJsonObject_Dispose(factorObj);
    CkJsonArray_Dispose(vArray);
    CkJsonObject_Dispose(vFactors);

    // 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
    CkJsonObject_putEmitCompact(json,FALSE);
    CkHttpRequest_LoadBodyFromString(req,CkJsonObject_emit(json),"utf-8");

    // View the request that would be sent if SynchronousRequest was called:
    requestMime = CkHttpRequest_generateRequestText(req);
    printf("%s\n",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 SynchronousRequest
    //    is called


    CkHttpRequest_Dispose(req);
    CkJsonObject_Dispose(json);

    }