Rust Requires Chilkat v11.1.0+

Creating an application/json HTTP POST Request

See more HTTP Examples

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"
      }
    ]
  }
}

Rust

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

let req = chilkat::HttpRequest::new();

// The ContentType, HttpVerb, and Path properties should
// always be explicitly set.
req.set_http_verb("POST");
req.set_path("/something");
req.set_content_type("application/json");

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

// We'll use Chilkat's JSON API to create the JSON body of the HTTP request.
let json = chilkat::JsonObject::new();
let _ = json.append_string("username", "my_username");
let _ = json.append_string("password", "my_password");

let v_factors = chilkat::JsonObject::new();
let _ = json.append_object2("validation-factors", &v_factors);

let v_array = chilkat::JsonArray::new();
let _ = v_factors.append_array2("validationFactors", &v_array);

let factor_obj = chilkat::JsonObject::new();
let _ = v_array.add_object_at2(0, &factor_obj);
let _ = factor_obj.append_string("name", "remote_address");
let _ = factor_obj.append_string("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
json.set_emit_compact(false);
let _ = req.load_body_from_string(&json.emit().unwrap_or_default(), "utf-8");

// View the request that would be sent if HttpSReq was called:
let request_mime = req.generate_request_text().unwrap_or_default();
println!("{}", request_mime);

// 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.