Parsing a Char GET response

Using Arduino Programming Questions
1

Hi, could use some help, As a response to a Http GET I receive the following;

startedRequest ok
Got status code: 200
Content length is: 316

Body returned follows:
"postId": 11,
"id": 52,
"name": "esse autem dolorum",
"email": "Abigail.OConnell@june.org",
"body": "et enim voluptatem totam laudantium\nimpedit nam labore repellendus enim earum aut\nconsectetur mollitia fugit qui repellat expedita sunt\naut fugiat vel illo quos aspernatur ducimus"

Using this code...

char c;
       while ( (http.connected() || http.available()) &&
               ((millis() - timeoutStart) < kNetworkTimeout) )
        {
            if (http.available())
            {
                c = http.read();
                // Print out this character
                Serial.print(c);

I would like to extract the name from this text as a char but have no idea where to begin. Thx

2

By "name" you mean the HTML title?

3

I don't think so, looks like the third line of the body is required.

I'd read it char by char into an array and whenever you see a comma search that buffer for "name":. If it's found, the remainder of the buffer is the content you're looking for. If not, reset the buffer index before reading more.

Don't forget to check to avoid buffer overflow.

4

no, the variable "name" in the text

5

ok,I expected to be able to search for "name" and extract what comes next

6

First you need something holding the text so that it can be searched, hence the suggestion to use an array of chars

7

Then maybe something like this if you have no objections to using the String class.

String response = http.responseBody();  
size_t startIndex = response.indexOf("\"name\": \"") + 9;
size_t endIndex = response.indexOf("\"", startIndex);
Serial.println(response.substring(startIndex, endIndex));
8 
void setup() {
  Serial.begin(115200);
}
struct Input {
  uint16_t postId;
  uint16_t id;
  String name;
  String email;
  String body;
} inputString;

void loop() {
  while (!Serial.available());
  if ( Serial.available() > 10)
  {
    inputString.postId = Serial.parseInt();
    inputString.id = Serial.parseInt();
    Serial.readStringUntil(' ');
    Serial.readStringUntil(' ');
    inputString.name = Serial.readStringUntil(',');
    Serial.readStringUntil(' ');
    Serial.readStringUntil(' ');
    inputString.email = Serial.readStringUntil(',');
    Serial.readStringUntil(' ');
    Serial.readStringUntil(' ');
    inputString.body = Serial.readStringUntil(',');
    Serial.flush();
    Serial.println(inputString.postId);
    Serial.println(inputString.id);
    Serial.println(inputString.name);
    Serial.println(inputString.email);
    Serial.println(inputString.body);
  }
}
9

This topic was automatically closed 180 days after the last reply. New replies are no longer allowed.