Running gemini server diagnostics check against heavysquare.com:1965
...

[IPv4Address] Establish a connection over an IPv4 address
Looking up IPv4 address for 'heavysquare.com'
  ✓ '95.216.162.65'
Attempting to connect to 95.216.162.65:1965
  ✓ Successfully established connection

[IPv6Address] Establish a connection over an IPv6 address
Looking up IPv6 address for 'heavysquare.com'
  Found IPv4-mapped address, skipping check

[TLSVersion] Server must negotiate at least TLS v1.2, ideally TLS v1.3
Checking client library
  'OpenSSL 1.1.1d  10 Sep 2019'
Determining highest supported TLS version
  ✓ Negotiated TLSv1.3

[TLSClaims] Certificate claims must be valid
Checking "Not Valid Before" timestamp
  ✓ 2019-07-09 00:00:00 UTC
Checking "Not Valid After" timestamp
  ✓ 2021-07-08 23:59:59 UTC
Checking subject claim matches server hostname
  {'subject': ((('commonName', '*.heavysquare.com'),),), 'subjectAltName': (('DNS', '*.heavysquare.com'), ('DNS', 'heavysquare.com'))}
  ✓ Hostname 'heavysquare.com' matches claim

[TLSVerified] Certificate should be self-signed or have a trusted issuer
Connecting over verified SSL socket
  x [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1076)

[TLSRequired] Non-TLS requests should be refused
Sending non-TLS request
  ✓ ConnectionResetError(54, 'Connection reset by peer')

[ConcurrentConnections] Server should support concurrent connections
Attempting to establish two connections
  Opening socket 1
  Opening socket 2
  Closing socket 2
  Closing socket 1
  ✓ Concurrent connections supported

[Homepage] Request the gemini homepage
Requesting URL
  'gemini://heavysquare.com/\r\n';
Response header
  '20\ttext/gemini\r\n'
Status should return a success code (20 SUCCESS)
  ✓ Received status of '20'
Mime type should be "text/gemini"
  ✓ 'text/gemini'
Header should end with "\r\n"
  ✓ '\r\n'
Body should be non-empty
  ✓ 'HEAVYSQUARE GEMINI SERVER\n\n** Some local test file'
Body should terminate with a newline
  ✓ '\n'
Body should use "\r\n" line endings
  x Invalid line ending 'HEAVYSQUARE GEMINI SERVER\n'

[HomepageRedirect] A URL with no trailing slash should redirect to the canonical resource
Requesting URL
  'gemini://heavysquare.com\r\n';
Response header
  '20\ttext/gemini\r\n'
Status should return code 31 (REDIRECT PERMANENT)
  x '20'
Meta should redirect to location "gemini://hostname/";
  x 'text/gemini'
Header should end with "\r\n"
  ✓ '\r\n'
Body should be empty
  x 'HEAVYSQUARE GEMINI SERVER\n\n** Some local test file'

[PageNotFound] Request a gemini URL that does not exist
Requesting URL
  'gemini://heavysquare.com/09pdsakjo73hjn12id78\r\n';
Response header
  '51\tNot Found\r\n'
Status should return code 51 (NOT FOUND)
  ✓ '51'
Header should end with "\r\n"
  ✓ '\r\n'
Body should be empty
  ✓ ''

[RequestMissingCR] A request without a <CR> should timeout
Requesting URL
  'gemini://heavysquare.com/\n';
No response should be received
  ✓ The read operation timed out

[URLIncludePort] Send the URL with the port explicitly defined
Requesting URL
  'gemini://heavysquare.com/\r\n';
Response header
  '20\ttext/gemini\r\n'
Status should return a success code (20 SUCCESS)
  ✓ Received status of '20'

[URLSchemeMissing] A URL without a scheme should be inferred as gemini
Requesting URL
  '//heavysquare.com/\r\n'
Response header
  '51\tNot Found\r\n'
Status should return a success code (20 SUCCESS)
  x Received status of '51'

[URLByIPAddress] Send the URL using the IPv4 address
Requesting URL
  'gemini://95.216.162.65/\r\n';
Response header
  '20\ttext/gemini\r\n'
Verify that the status matches your desired behavior
  '20'

[URLInvalidUTF8Byte] Send a URL containing a non-UTF8 byte sequence
Requesting URL
  'gemini://heavysquare.com/\udcdc\r\n';
Response header
  '51\tNot Found\r\n'
Connection should either drop, or return 59 (BAD REQUEST)
  x '51'

[URLMaxSize] Send a 1024 byte URL, the maximum allowed size
Requesting URL
  'gemini://heavysquare.com/000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000\r\n';
Response header
  '40\tInternal server error\r\n'
Status should return code 51 (NOT FOUND)
  x '40'

[URLAboveMaxSize] Send a 1025 byte URL, above the maximum allowed size
Requesting URL
  'gemini://heavysquare.com/0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000\r\n';
Response header
  '40\tInternal server error\r\n'
Connection should either drop, or return 59 (BAD REQUEST)
  x '40'

[URLWrongPort] A URL with an incorrect port number should be rejected
Requesting URL
  'gemini://heavysquare.com:443/\r\n';
Response header
  '20\ttext/gemini\r\n'
Status should return a failure code (5X PERMANENT FAILURE)
  x Received status of '20'

[URLWrongHost] A URL with a foreign hostname should be rejected
Requesting URL
  'gemini://wikipedia.org/\r\n';
Response header
  '20\ttext/gemini\r\n'
Status should return a failure code (5X PERMANENT FAILURE)
  x Received status of '20'

[URLSchemeHTTP] Send a URL with an HTTP scheme
Requesting URL
  'http://heavysquare.com/\r\n';
Response header
  '20\ttext/gemini\r\n'
Status should return a failure code (5X PERMANENT FAILURE)
  x Received status of '20'

[URLSchemeHTTPS] Send a URL with an HTTPS scheme
Requesting URL
  'https://heavysquare.com/\r\n';
Response header
  '20\ttext/gemini\r\n'
Status should return a failure code (5X PERMANENT FAILURE)
  x Received status of '20'

[URLSchemeGopher] Send a URL with a Gopher scheme
Requesting URL
  'gopher://heavysquare.com/\r\n';
Response header
  '20\ttext/gemini\r\n'
Status should return a failure code (5X PERMANENT FAILURE)
  x Received status of '20'

[URLEmpty] Empty URLs should not be accepted by the server
Requesting URL
  '\r\n'
Response header
  '40\tInternal server error\r\n'
Status should return a failure code (5X PERMANENT FAILURE)
  x Received status of '40'

[URLRelative] Relative URLs should not be accepted by the server
Requesting URL
  '/\r\n'
Response header
  '20\ttext/gemini\r\n'
Status should return a failure code (5X PERMANENT FAILURE)
  x Received status of '20'

[URLDotEscape] A URL should not be able to escape the root using dot notation
Requesting URL
  'gemini://heavysquare.com/../../\r\n';
Response header
  '20\ttext/gemini\r\n'
Status should return a failure code (5X PERMANENT FAILURE)
  x Received status of '20'

Done!