I’m running local blynk server v0.28.4
I received the following error, could you pls help explain what could be causing it (I simply upgraded from older version server to this, I am running local server on Java 9 on Windows 10) - all my apps running ok however :
"Error creating new authz :: Too many invalid authorizations recently."
all my apps running ok however curiously all of a sudden the following statement client.connet call fails to open connection…I’m investigating if this server version broke something, I’ve confirmed it works via s simple URL in a browser but not the the app:
if (!client.connect(blynk_server_info.blynk_server, blynk_server_info.blynk_https_port))
{
Serial.println("connection failed");
blynk_return.blynk_int_valve = -2; // -2 means there was an error and Appliance name contains the error information
blynk_return.blynk_float_value = -2; // -2 means there was an error and Appliance name contains the error information
strcpy(blynk_return.appliance_name, "ERR:0x1:Failed2connect"); // "Failed to conect to client : Error information contained in appliance name
return (blynk_return);
}
else
it was an output on the screen just after I startup Blynk server…it appears after the line where blynk server prints that certificate has been created.
I managed to eliminate error by re-installing Java 9 into a different directory from Java 8. At least thats what I think fixed it
@Dmitriy@psoro
psoro - even though its 0.28.3 on web site its actually shows 0.28.4-SNAPSHOT on CMD output.
Dmitriy: I have one server
I just did another test: (my conclusion, client.connect breaks when using local server with Java 9 implementation)
My Configuration: Given I am using the default blynk server generated certificates I wonder if Java 9 does not like it as it seems to work when I try a client.connet to say “api.github.com” using WifiClientSecure.
my steps: uninstalled Java 8 and installed Java 9 and then started local Blynk server
C:\Users\m>java -version
java version "9.0.1"
Java(TM) SE Runtime Environment (build 9.0.1+11)
Java HotSpot(TM) 64-Bit Server VM (build 9.0.1+11, mixed mode)
Output from CMD:
Blynk Server 0.28.4-SNAPSHOT successfully started.
All server output is stored in folder 'C:\Users\m\Downloads\.\logs' file.
Generating own initial certificates...
Error during certificate generation.
Challenge failed... Giving up.
I am using the following code to run tests on Java 8 and Java 9. Using Java 9 and v0.28.4 trying to connect to my local blynk server via client.connet (using wificlientsecure) fails to connect to my local server but works if I go to “api.github.com”. Could it be that I don’t have CA signed certificates ?
Once I rolled back to Java 8 all works fine using v0.28.4 i.e. client.connect in below code works fine when trying to connect to my local blynk server.
*
* HTTP over TLS (HTTPS) example sketch
*
* This example demonstrates how to use
* WiFiClientSecure class to access HTTPS API.
* We fetch and display the status of
* esp8266/Arduino project continuous integration
* build.
*
* Created by Ivan Grokhotkov, 2015.
* This example is in public domain.
*/
#include <ESP8266WiFi.h>
#include <WiFiClientSecure.h>
const char* ssid = "xxxxx";
const char* password = "xxxx";
const char* host = "localblynkserver.com";
const int httpsPort = 9443;
// Use web browser to view and copy
// SHA1 fingerprint of the certificate
const char* fingerprint = "CF 05 98 89 CA FF 8E D8 5E 5C E0 C2 E4 F7 E6 C3 C7 50 DD 5C"; // NOTE: this is not my local blynk server fingerprint
// Use WiFiClientSecure class to create TLS connection
WiFiClientSecure client;
void setup() {
Serial.begin(115200);
Serial.println();
Serial.print("connecting to ");
Serial.println(ssid);
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println("");
Serial.println("WiFi connected");
Serial.println("IP address: ");
Serial.println(WiFi.localIP());
}
void loop() {
Serial.print("connecting to ");
Serial.println(host);
if (!client.connect(host, httpsPort)) { // NOTE: this is where failes to connected using Java 9
Serial.println(">>> connection failed");
return;
}
if (client.verify(fingerprint, host)) {
Serial.println("certificate matches");
} else {
Serial.println("certificate doesn't match");
}
String url = "/repos/esp8266/Arduino/commits/master/status";
Serial.print("requesting URL: ");
Serial.println(url);
client.print(String("GET ") + url + " HTTP/1.1\r\n" +
"Host: " + host + "\r\n" +
"User-Agent: BuildFailureDetectorESP8266\r\n" +
"Connection: close\r\n\r\n");
Serial.println("request sent");
while (client.connected()) {
String line = client.readStringUntil('\n');
if (line == "\r") {
Serial.println("headers received");
Serial.println (line);
break;
}
}
String line = client.readStringUntil('\n');
if (line.startsWith("{\"state\":\"success\"")) {
Serial.println("esp8266/Arduino CI successfull!");
Serial.println(line);
} else {
Serial.println("esp8266/Arduino CI has failed");
Serial.println(line);
}
Serial.println("closing connection");
Serial.println(ESP.getFreeHeap());
}
Sorry, I’m not sure I’m doing a good job in explaining the issue. Basically the above statement fails to successfully connect to my local blynk server when I use java 9 run time installed (I assume it’s jdk I needed to install), but successfully connects when I use java 8 version of blynk server with Java 8 runtime installed.
