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Let's say the GET response is a flat string containing large .json file with all the commas and curly brackets. The idea is to read it byte-by-byte and instead of storing it just find the key you need and extract its value.

HTTPClient http;
http.begin("http://data.nba.net/data/10s/prod/v1/20190223/scoreboard.json");
int httpCode = http.GET();
if (httpCode == HTTP_CODE_OK)
 Serial.println(getValue(http, "97.5 FM", 3, 4));

where the getValue() function is defined as follows:

String getValue(HTTPClient &http, String key, int skip, int get) {
 bool found = false, look = false;
 int ind = 0;
 String ret_str = "";
 int len = http.getSize();
 char char_buff[1];
 WiFiClient * stream = http.getStreamPtr();
 while (http.connected() && (len > 0 || len == -1)) {
 size_t size = stream->available();
 if (size) {
 int c = stream->readBytes(char_buff, ((size > sizeof(char_buff)) ? sizeof(char_buff) : size));
 if (len > 0)
 len -= c;
 if (found) {
 if (skip == 0) {
 ret_str += char_buff[0];
 get --;
 } else
 skip --;
 if (get <= 0)
 break;
 }
 else if ((!look) && (char_buff[0] == key[0])) {
 look = true;
 ind = 1;
 } else if (look && (char_buff[0] == key[ind])) {
 ind ++;
 if (ind == key.length()) found = true;
 } else if (look && (char_buff[0] != key[ind])) {
 ind = 0;
 look = false;
 }
 }
 }
 return ret_str;
}

There is probably (i.e., most likely) a better way of doing this, but this approach works and it's pretty fast, so...

Let's say the GET response is a flat string containing a large .json file with all the commas and curly brackets. The idea is to read it byte-by-byte, and instead of storing it, just find the key you need and extract its value.

 HTTPClient http;
 http.begin("http://data.nba.net/data/10s/prod/v1/20190223/scoreboard.json");
 int httpCode = http.GET();
 if (httpCode == HTTP_CODE_OK)
 Serial.println(getValue(http, "97.5 FM", 3, 4));

Where the getValue() function is defined as follows:

 String getValue(HTTPClient &http, String key, int skip, int get) {
 bool found = false, look = false;
 int ind = 0;
 String ret_str = "";
 
 int len = http.getSize();
 char char_buff[1];
 WiFiClient * stream = http.getStreamPtr();
 while (http.connected() && (len > 0 || len == -1)) {
 size_t size = stream->available();
 if (size) {
 int c = stream->readBytes(char_buff, ((size > sizeof(char_buff)) ? sizeof(char_buff) : size));
 if (len > 0)
 len -= c;
 if (found) {
 if (skip == 0) {
 ret_str += char_buff[0];
 get --;
 } else
 skip --;
 if (get <= 0)
 break;
 }
 else if ((!look) && (char_buff[0] == key[0])) {
 look = true;
 ind = 1;
 } else if (look && (char_buff[0] == key[ind])) {
 ind ++;
 if (ind == key.length()) found = true;
 } else if (look && (char_buff[0] != key[ind])) {
 ind = 0;
 look = false;
 }
 }
 }
 return ret_str;
 }

There is probably (i.e., most likely) a better way of doing this, but this approach works and it's pretty fast.

Let's say the GET response is a flat string containing large .json file with all the commas and curly brackets. The idea is to read it byte-by-byte and instead fo storing it just find whatever key you need and extract its value.

Let's say the GET response is a flat string containing large .json file with all the commas and curly brackets. The idea is to read it byte-by-byte and instead of storing it just find the key you need and extract its value.