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BearSSL Max Fragment Length Negotation and Node.js server (#5929)

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* Minor bug fixes in Maximum Fragment Length Negotation example, mainly giving background processes some time in fetch()

* Minor layout changes to pass travis tests

* Use PolledTimeout for timeout
This commit is contained in:
Jeroen88 2019-04-11 14:21:04 +02:00 committed by david gauchard
parent f950d53d82
commit 667816ebe0
1 changed files with 13 additions and 7 deletions
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20
libraries/ESP8266WiFi/examples/BearSSL_MaxFragmentLength/BearSSL_MaxFragmentLength.ino
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@ -5,6 +5,7 @@
// Released to the public domain
#include <ESP8266WiFi.h>
#include <PolledTimeout.h>
#ifndef STASSID
#define STASSID "your-ssid"
@ -17,17 +18,22 @@ const char *pass = STAPSK;
void fetch(BearSSL::WiFiClientSecure *client) {
client->write("GET / HTTP/1.0\r\nHost: tls.mbed.org\r\nUser-Agent: ESP8266\r\n\r\n");
client->flush();
uint32_t to = millis() + 5000;
using oneShot = esp8266::polledTimeout::oneShot;
oneShot timeout(5000);
do {
char tmp[32];
memset(tmp, 0, 32);
int rlen = client->read((uint8_t*)tmp, sizeof(tmp) - 1);
yield();
if (rlen < 0) {
break;
}
if (rlen == 0) {
delay(10); // Give background processes some time
continue;
}
tmp[rlen] = '\0';
Serial.print(tmp);
} while (millis() < to);
} while (!timeout);
client->stop();
Serial.printf("\n-------\n");
}
@ -73,11 +79,11 @@ int fetchMaxFragmentLength() {
BearSSL::WiFiClientSecure client;
client.setInsecure();
bool mfln = client.probeMaxFragmentLength("tls.mbed.org", 443, 1024);
bool mfln = client.probeMaxFragmentLength("tls.mbed.org", 443, 512);
Serial.printf("\nConnecting to https://tls.mbed.org\n");
Serial.printf("MFLN supported: %s\n", mfln ? "yes" : "no");
if (mfln) {
client.setBufferSizes(1024, 1024);
client.setBufferSizes(512, 512);
}
client.connect("tls.mbed.org", 443);
if (client.connected()) {
@ -125,6 +131,6 @@ void loop() {
yield();
Serial.printf("\n\n");
Serial.printf("Default SSL: %d bytes used\n", a);
Serial.printf("1024 byte MFLN SSL: %d bytes used\n", b);
Serial.printf("Default SSL: %d bytes used\n", a);
Serial.printf("512 byte MFLN SSL: %d bytes used\n", b);
}