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Simplest TLS (gemini) fetch in Go

Created 2022-06-09

Below is the "simplest thing that could possibly work" in terms of fetching a file from a Gemini server. There is no verification of certificates, or any of that ilk. This example just fetches the root document "/", which should translate to "/index.gmi". It is trivial to fetch any document you like, though.

I don't think any further elaboration is required. I have yet to figure out the whole certificate thing.

/*
Retrieve a resource from gemini using Go.
Demonstrates the use of TLS. No verfication

Created 2022-06-09

	/


package main

import (
        "fmt"
        "log"
        "crypto/tls"
        "io/ioutil"
)

func main() {
        log.SetFlags(log.Lshortfile)

        conf := &tls.Config{
                InsecureSkipVerify: true, // don't fuss over the server's certificate
        }

        uri := "gemini.conman.org:1965"
        //uri =  "blinkyshark.chickenkiller.com:1965"
        conn, err := tls.Dial("tcp", uri, conf)
        if err != nil {
                log.Println(err)
                return
        }
        defer conn.Close()

        n, err := conn.Write([]byte("gemini://" + uri + "/" + "\r\n"))
        if err != nil {
                log.Println(n, err)
                return
        }

        result, err := ioutil.ReadAll(conn)
        full_response := string(result) // includes the status line
        if err != nil {
                log.Println(result, err)
                return
        }
        fmt.Println(full_response)


}

References

Gemini protocol

Simple Golang HTTPS/TLS examples

getgem.go - source code