GET the first result in HTTP request

Question

I have a String content="" and if I put an HTTP request like this:

client.println("GET /api/actions?parking_id=39 HTTP/1.1");
client.println("Host: ramp-rampcontrol.rhcloud.com");
client.println("Connection: close");
client.println();

the output I get is:

 [{"action_id":35,"action_type":"up","parking_id":39,"user_id":17,"ramp":"exit","created_at":"2015-07-10 18:02:40","updated_at":"2015-07-10 18:02:40"},{"action_id":41,"action_type":"up","parking_id":39,"user_id":17,"ramp":"entry","created_at":"2015-08-16 20:50:14","updated_at":"2015-08-16 20:50:14"},{"action_id":42,"action_type":"down","parking_id":39,"user_id":17,"ramp":"entry","created_at":"2015-08-16 20:50:21","updated_at":"2015-08-16 20:50:21"},{"action_id":43,"action_type":"down","parking_id":39,"user_id":17,"ramp":"exit","created_at":"2015-08-16 20:50:22","updated_at":"2015-08-16 20:50:22"}]

The little parser I created is this:

while(client.available()) {
 char c = client.read();   
    if(c == '{'){
      begin1 = true;
    }

  if (begin1) { 
    content += c;
   }

  if (c == '}') {
      break; 
    }
 }

Is it possible to store only the first action in JSON output, because the actions are updated, and if the number of chars extends 256 than I get errors while working with the String content?

Answer 1

Your question is not clear to me. First of all does your parser get the whole response? And second by first action do you mean "action_id":35"? If both are true then your solution is simple.

First you separate every comma ", " and put in a string array then you further split each index by ":" so the first part is the name "action_id" and the second is the value "35". I hope that helps . You can look up the split function, it's easy.

But if the above is not what you needed then I am afraid you cannot get only the first response, because that has to do with the server itself.

Here is a solution, do try it.

I found an easier solution. Follow the example and replace the content and fields with your response content and you will be done in minutes.