correct method PUT WebRequest() in MQL4 - mql4

Question

I attempted to update a JSON at myjson.com, using the WebRequest(), resulting in a failure.
return result: 2018.05.22 23:54:44.401 webreq NZDCAD,H1: Status code: 404, error: 4000
I want to change name from "John" to "Labu"
My code is like the following:
void postJson()
{
char post[], result[];
string headers = "Content-Type: application/json\r\n";
string obj = "'data:{\"name\":\"Labu\"}'";
StringToCharArray( obj, post, 0, WHOLE_ARRAY ); // Must specify string length;
// otherwise array has
// terminating null character in it
int res = WebRequest( "POST",
"https://api.myjson.com/bins/tj8e2",
"PUT",
NULL,
10000,
post,
ArraySize( post ),
result,
headers
);
Print( "Status code: " , res, ", error: ", GetLastError() );
Print( "Server response: ", CharArrayToString( result ) );
}

Answer 1

string obj="'data:{\"name\":\"Labu\"}'";
you do not need the '-chars
you must make sure that the address is valid and that it is added to the list of allowed web sites ( inside the MetaTrader Terminal configuration setup panel ).

Answer 2

remove POST and put PUT,
read your own code: WebRequest( "POST",
should be, WebRequest( "PUT",
You are using POST method still.
Here:
int WebRequest(
const string method, // HTTP method
const string url, // URL
const string cookie, // cookie
const string referer, // referer
int timeout, // timeout
const char &data[], // the array of the HTTP message body
int data_size, // data[] array size in bytes
char &result[], // an array containing server response data
string &result_headers // headers of server response
);
Now would be a good time to also mention mt4 don't support PUT or DELETE only POST and GET ;)