A minimal HTTP library for working with web services natively in NetLinx.
As there’s no blocking socket IO in NetLinx when you make a call to any of the request function (http_get, http_head, http_put, http_post, http_patch or http_delete) this will return you a unique ‘sequence number’.
When a response is received it will call back to a function http_response_received(..) which you implement in your code. This will contain 3 arguments: the sequence number, the full request object and a fully parsed response object ready for you to deal with as you like. If you’re not interested in response feel free to omit this, otherwise just pop in a #define HTTP_RESPONSE_CALLBACK - similar to the RMS SDK.
An error, when encountered, will callback to http_error(..) along with the sequence number, the target request host, the full request object and an error number. #define HTTP_ERROR_CALLBACK signifies you’re interested in dealing with these.
By default it can handle up to 10 parallel requests but if you’re really hammering it, or dealing with a slow connection / server this can be bumped up or down by changing HTTP_MAX_PARALLEL_REQUESTS.
This software is distributed under MIT license, so feel free to integrate it in your commercial products.