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Update sessions example to show speed difference (#8528)

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Fixes #8505
This commit is contained in:
Earle F. Philhower, III
2022-04-04 01:48:29 -07:00
committed by GitHub
parent 04fe1b9667
commit d205a63309
3 changed files with 45 additions and 94 deletions
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19
libraries/ESP8266WiFi/examples/BearSSL_Sessions/BearSSL_Sessions.ino
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@ -1,5 +1,12 @@
// Example of using SSL sessions to speed up SSL connection initiation
//
// Note that sessions are a function of individual HTTPS servers, so if you
// are connecting to a service through a load abalncer (i.e. Azure, AWS, GitHub)
// two connections to the same IP address will generally connect to two
// different web servers, meaning that sessions won't work. If you are
// connecting to a single server not behind a load balancer/etc., however,
// there should be a significant speedup.
//
// September 2018 by Earle F. Philhower, III
// Released to the public domain
@ -94,12 +101,14 @@ void fetchURL(BearSSL::WiFiClientSecure *client, const char *host, const uint16_
void loop() {
uint32_t start, finish;
BearSSL::WiFiClientSecure client;
BearSSL::X509List cert(cert_DigiCert_High_Assurance_EV_Root_CA);
BearSSL::X509List cert(certForum);
const char *host = "esp8266.com";
const int port = 443;
Serial.printf("Connecting without sessions...");
start = millis();
client.setTrustAnchors(&cert);
fetchURL(&client, github_host, github_port, path);
fetchURL(&client, host, port, path);
finish = millis();
Serial.printf("Total time: %dms\n", finish - start);
@ -108,21 +117,21 @@ void loop() {
Serial.printf("Connecting with an uninitialized session...");
start = millis();
client.setTrustAnchors(&cert);
fetchURL(&client, github_host, github_port, path);
fetchURL(&client, host, port, path);
finish = millis();
Serial.printf("Total time: %dms\n", finish - start);
Serial.printf("Connecting with the just initialized session...");
start = millis();
client.setTrustAnchors(&cert);
fetchURL(&client, github_host, github_port, path);
fetchURL(&client, host, port, path);
finish = millis();
Serial.printf("Total time: %dms\n", finish - start);
Serial.printf("Connecting again with the initialized session...");
start = millis();
client.setTrustAnchors(&cert);
fetchURL(&client, github_host, github_port, path);
fetchURL(&client, host, port, path);
finish = millis();
Serial.printf("Total time: %dms\n", finish - start);