iterating through all records of an mrt (routing) file with go-mrt

read-mrt.go

package main

import (
    "log"
    "os"

    mrt "github.com/kaorimatz/go-mrt"
)

// basic bgp/mrt library: https://github.com/kaorimatz/go-mrt/
// full bgp library: https://github.com/osrg/gobgp
//
// go-mrt is useful because I only need to parse mrt files

func main() {
    f, err := os.Open("updates-201608252015")
    if err != nil {
        log.Fatal(err)
    }
    defer f.Close()

    mf := mrt.NewReader(f)
    i := 0

    // protect ourselves from panic (due to corrupt MRT files)
    defer func() {
        log.Printf("done processing")
        if x := recover(); x != nil {
            log.Printf("run time panic: %v, processing ended early", x)
        }
    }()

    // iterate through all records
    for {
        record, err := mf.Next() // one day, I'll implement a Read()

        if record == nil {
            break
        }
        if err != nil {
            log.Printf("error: %s, continuing...\n", err)
            continue
        }

        // only care about timestamp
        ts, _ := (*record).Timestamp().MarshalText()
        log.Printf("%d %s\n", i, ts)

        i = i + 1
    }
}