Reading from news API server seems to have buffer overflow.

[twiereng]

I can receive the JSON string from the server with this function but it is truncated - the end is not a correct ending for a JSON string. I believe I have buffer overflow. How can I change the buffer size? Using Arduino IDE 2.2.1 and Espressif ESP32 board 2.0.14.

Thanks, Theron WIerenga

Code: [Select all] [Expand/Collapse]

1. // Retrieve news headlines from newsapi.org
2. // *****************************************************************************************************************
3. void getNewsFromInternet()
4. {
5.    const char* server = "newsapi.org";
6.    WiFiClientSecure client;
7.    client.setInsecure();
8.    const int httpPort = 443; // 80 is for HTTP / 443 is for HTTPS!
9.    int httpCode, count = 0;
10.    news_payload = "        ";
11.  
12.   Serial.println("\nStarting connection to server...");
13.   httpCode = client.connect(server, 443);
14.   Serial.println(httpCode);
15.   if (httpCode == 0)
16.     Serial.println("Connection failed!");
17.   else {
18.     Serial.println("Connected to server!");
19.     // Make a HTTP request:
20.     client.println("GET /v2/top-headlines?country=us&apiKey=myKey HTTP/1.1");
21.     client.println("Host: newsapi.org");
22.     client.println("Connection: close");
23.     client.println("User-Agent: ArduinoWiFi/1.0"); // This is an example User-Agent; you can set it to anything relevant
24.     client.println();
25.  
26.     while (client.connected()) {
27.       String line = client.readStringUntil('\n');
28.       if (line == "\r") {
29.         Serial.println("headers received");
30.         break;
31.       }
32.     }
33.     // if there are incoming bytes available
34.     // from the server, read them and print them:
35.     count = 0;
36.     while (client.available()) {
37.       n_payload[count++] = client.read();
38.       // news_payload += c;
39.     }
40.     n_payload[count] = 0x00;
41.     // Convert to String  
42.     news_payload = String(n_payload);
43.     Serial.print("news_payload = ");
44.     Serial.println(news_payload);
45.     Serial.println(news_payload.length());
46.     Serial.println(count);
47.     client.stop();
48.   }
49. }

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[pipi61]

Check these variable definitions:
news_payload
n_payload