rmongodb (version 1.8.0)

mongo.gridfile.pipe: Pipe a mongo.gridfile to an R connection

Description

Pipe a mongo.gridfile to an R connection. This outputs the entire GridFS file to a connection. If the connection is open, it must be in binary output mode; otherwise, the connection is opened in binary output mode and closed afterwards.

Usage

mongo.gridfile.pipe(gridfile, con)

Arguments

gridfile

A (mongo.gridfile) object.

con

(connection) An R connection object.

See Also

mongo.gridfs, mongo.gridfs.find, mongo.gridfile, mongo.gridfile.get.descriptor, mongo.gridfile.get.filename, mongo.gridfile.get.length, mongo.gridfile.get.chunk.size, mongo.gridfile.get.chunk.count, mongo.gridfile.get.content.type, mongo.gridfile.get.upload.date, mongo.gridfile.get.md5, mongo.gridfile.get.metadata, mongo.gridfile.get.chunk, mongo.gridfile.get.chunks, mongo.gridfile.read, mongo.gridfile.seek.

Examples

mongo <- mongo.create()
if (mongo.is.connected(mongo)) {
    gridfs <- mongo.gridfs.create(mongo, "grid")
    mongo.gridfs.store.file(gridfs, "tests/test.R", "test.R")

    gf <- mongo.gridfs.find(gridfs, "test.R")
    if (!is.null(gf)) {
        f <- file("mongodb_copy.pdf")
        mongo.gridfile.pipe(gf, f)

        mongo.gridfile.destroy(gf)
    }

    mongo.gridfs.destroy(gridfs)
}