Communicating with an SSL-enabled HTTP server

Application Developer Guide > Interapplication Communication for UNIX > Communicating with an SSL-enabled HTTP server

note	Due to export restrictions, the SSL_connect OPI is only available upon request.

The SSL_connect OPI allows PV-WAVE sessions to communicate and exchange data with an SSL-enabled HTTP server (HTTPS). The PV-WAVE SSL_connect OPI uses the OpenSSL library to support the client side of an SSL connection. There is currently no support for PV-WAVE to act as an SSL-enabled server. If you wish to have two PV-WAVE sessions communicate with each other you should use the PV-WAVE socket OPI.

The basic steps for exchanging data with an HTTPS server are:

Load the SSL_connect OPI into your PV-WAVE session.

Establish a connection with the remote server.

Optionally validate the server as a trusted source.

Send your command to the server as a PV-WAVE STRING.

Read and parse the response, returned as a PV-WAVE BYTE array.

Close the connection.

SSL_connect OPI Routines lists the SSL_connect OPI routines.

Table 2-4: SSL_connect OPI Routines
Function/Procedure	Purpose
SSL_CLIENT_CLOSE Procedure	Closes an SSL connection and frees the local resources.
SSL_CLIENT_CONNECT Function	Initializes the OpenSSL library and establishes a connection with a remote HTTPS server.
SSL_CLIENT_READ Function	Reads a BYTE array from a connection with an SSL-enabled HTTP server.
SSL_CLIENT_WRITE Function	Writes a PV-WAVE STRING to an established SSL connection.
SSL_CONNECT_LOAD Procedure	Loads the SSL_connect OPI into your PV-WAVE session.

A working example of this process is found in the ssl_demo.pro procedure in the SSL_connect lib directory.

The OpenSSL library is statically linked to the SSL_connect shared objects, so you do not need to have it present on your system. The OpenSSL version is 1.0.2a.

Version 2017.0