Description

Computes the length of the prettified JSON document that JsonArray::prettyPrintTo() produces, excluding the null-terminator.

This function is handy to fill the Content-Length header.

Signature

size_t measurePrettyLength() const

Return value

The number of characters that JsonArray::prettyPrintTo() produces, excluding the null-terminator.

Example

// Send headers
client.println("Content-Type: application/json");
client.print("Content-Length: ");
client.println(root.measurePrettyLength());

// Terminate headers
client.prettyPrintln();

// Send body
root.printTo(client);

See also