Call mongoc_handshake_data_append

Summary Calls the libmongoc function mongoc_handshake_data_append to add additional metadata to the connection handshake to identify wrapping drivers.

Motivation The MongoDB driver handshake specification Supporting Wrapping Libraries defines an API for wrapping libraries to identify themselves. mongoc_handshake_data_append is utilized by the MongoDB PHP driver and MongoDB C++ driver.

Testing

I am new to R. I was able to build and install locally with:

R CMD BUILD mongolite
R CMD INSTALL mongolite_2_3_1.tar.gz

I tested this by opening a connection with:

library(mongolite)
m <- mongo()

I observed the logs of a local running mongod to see the difference in the handshake metadata.

Before this change:

{"t":{"$date":"2021-08-23T11:56:25.010-04:00"},"s":"I",  "c":"NETWORK",  "id":51800,   "ctx":"conn1073","msg":"client metadata","attr":{"remote":"127.0.0.1:60575","client":"conn1072","doc":{"application":{"name":"r/mongolite"},"driver":{"name":"mongoc","version":"1.16.2"},"os":{"type":"Darwin","name":"macOS","version":"20.5.0","architecture":"x86_64"},"platform":"cfg=0x000216aa65 posix=200112 stdc=201710 CC=clang 12.0.5 (clang-1205.0.22.11) CFLAGS=\"\" LDFLAGS=\"\""}}}

After this change:

{"t":{"$date":"2021-08-23T12:15:27.444-04:00"},"s":"I",  "c":"NETWORK",  "id":51800,   "ctx":"conn1074","msg":"client metadata","attr":{"remote":"127.0.0.1:61003","client":"conn1074","doc":{"application":{"name":"r/mongolite"},"driver":{"name":"mongoc / mongolite","version":"1.16.2 / "},"os":{"type":"Darwin","name":"macOS","version":"20.5.0","architecture":"x86_64"},"platform":"R=4.1.1 cfg=0x000216aa65 posix=200112 stdc=201710 CC=clang 12.0.5 (clang-1205.0.22.11) CFLAGS=\"\" LDFLAGS=\"\""}}}

jeroen / mongolite

Call mongoc_handshake_data_append #225