This is implementation VServer used python. The source project Nodejs-VServer.

Base on Python2.7 and Flask 0.10.1, you can refers requirements.txt .

Virtual Server (vserver) is used as a virtual https server for test purpose.

It behaves according to the request's headers.

For example, it can be controlled to return 404 by setting the header 'X-VS-CTRL-Status-Code: 404'.

For more details, please refers to the section HTTP HEADER Parameters.

1. Generate self-signed certs for vserver by openssl.

   Generate vserver certs:

   $ openssl req -x509 -sha256 -passout "pass:nu5/SM/JIRHa=pi8" -days 365 -newkey rsa:2048 -keyout vserver.pri.pem -out vserver.crt.pem

   Put them into the 'certs' directory.

2. Generate self-signed certs for vserver-client by openssl

   Generate vserver-client certs:

   $ openssl req -x509 -sha256 -passout "pass:P9Va6!" -days 365 -newkey rsa:2048 -keyout vserver-client.pri.pem -out vserver-client.crt.pem

   Put them into the 'certs' directory.

3. Specify trusted client certs to the 'TRUSTED_CACERT' variable in file 'config.py'.

   SERVER_SSL_CERT = 'certs/vserver.crt.pem'
   SERVER_SSL_KEY = 'certs/vserver.pri.pem'
   SERVER_SSL_PASS = 'nu5/SM/JIRHa=pi8'
   TRUSTED_CACERT = 'certs/vserver-client.crt.pem'

   See Client Certs for details.

4. Start server.

   $ python vserver.py

5. Test with curl

   Test certs:

   $ curl -i -X POST -d "{ \"key\": \"value\" }" --cert certs/vserver-client.crt.pem --key certs/vserver-client.pri.pem --pass P9Va6! --cacert certs/vserver.crt.pem -H "X-VS-CTRL-STATUS-CODE: 404" -H "CONTENT-TYPE: text/json; charset=utf8" --insecure https://127.0.0.1:8443
    % Total % Received % Xferd Average Speed Time Time Time Current
    Dload Upload Total Spent Left Speed
   100 22 100 11 100 11 63 63 --:--:-- --:--:-- --:--:-- 63
   HTTP/1.0 404 NOT FOUND
   Content-Type: text/json; charset=utf8
   Content-Length: 18
   Server: Werkzeug/0.11.3 Python/2.7.11
   Date: 2016年3月29日 01:29:32 GMT
   { "key": "value" }

   Specify the response status code:

   $ curl -i --cert certs/vserver-client.crt.pem --key certs/vserver-client.pri.pem --pass P9Va6! --cacert certs/vserver.crt.pem --insecure -H "x-vs-ctrl-status-code: 404" -H "Content-Type: text/json; charset=utf8" -d "{ \"key\": \"value\" }" -X POST https://127.0.0.1:8443
    % Total % Received % Xferd Average Speed Time Time Time Current
    Dload Upload Total Spent Left Speed
   100 36 100 18 100 18 104 104 --:--:-- --:--:-- --:--:-- 104
   HTTP/1.0 404 NOT FOUND
   Content-Type: text/json; charset=utf8
   Content-Length: 18
   Server: Werkzeug/0.11.3 Python/2.7.11
   Date: 2016年3月29日 01:31:57 GMT
   { "key": "value" }
   

   Wait 5 seconds then return empty body with 404 status code:

   $ curl -i --cert certs/vserver-client.crt.pem --key certs/vserver-client.pri.pem --pass P9Va6! --cacert certs/vserver.crt.pem --insecure -H "x-vs-ctrl-body-content-length: 0" -H "x-vs-ctrl-response-interval: 5" -H "x-vs-ctrl-status-code: 404" -H "Content-Type: text/json; charset=utf8" -d "{ \"key\": \"value\" }" -X POST https://127.0.0.1:8443
    % Total % Received % Xferd Average Speed Time Time Time Current
    Dload Upload Total Spent Left Speed
   100 18 0 0 100 18 0 3 0:00:06 0:00:05 0:00:01 0
   HTTP/1.0 404 NOT FOUND
   Content-Type: text/json; charset=utf8
   Content-Length: 0
   Server: Werkzeug/0.11.3 Python/2.7.11
   Date: 2016年3月29日 01:33:36 GMT
   

Define the return status code. The default value is: 200.

Define whether to clean all headers. Or it will return all headers in the request by default.

true: clean all headers from the request
false: keep the same headers as in the request (except the ones defined in "FILTER_HEADERS" of config.py)

Define whether generate random content, the header 'Content-Type: text/plain;charset=utf8' will be set to the response.

true: generate randome content.
false: use the original content. (default)

Define the content length.

-1: return the body content in the request. (default)
N|Nk|Nm: define the content length.

N is a number, states bytes of the content. e.g. "1024", "1k", "1m"

If the content of the request is not enough for this requirement, the content will be repeated. If the content of the request is too long, it will be truncated.

Define the waiting time before return.

-1: return immediately (default)
N: wait (at least) N seconds before returning.

By default, vserver requires client cert to validate requests. All configurations can be set in the file 'config.py'.

1. Specify your own certs in the "TRUSTED_CACERT" property.

   Example:

   TRUSTED_CACERT = 'certs/vserver-client.crt.pem'

2. Accept client connections without trusted certs, this is Fixed inside the code of vserver.py

   	ssl_ctx.verify_mode = ssl.CERT_REQUIRED

python-vserver is licensed under GPL v3. The license is availabe here.