97 lines
2.3 KiB
Go
97 lines
2.3 KiB
Go
// For more tutorials: https://blog.learngoprogramming.com
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//
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// Copyright © 2018 Inanc Gumus
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// Learn Go Programming Course
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// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
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//
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package main
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import (
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"compress/gzip"
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"fmt"
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"net/http"
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)
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func main() {
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/*
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store := list{
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&book{product{"moby dick", 10}, toTimestamp(118281600)},
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&book{product{"odyssey", 15}, toTimestamp("733622400")},
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&book{product{"hobbit", 25}, unknown},
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&puzzle{product{"rubik's cube", 5}},
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&game{product{"minecraft", 20}},
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&game{product{"tetris", 5}},
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&toy{product{"yoda", 150}},
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}
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db := database{list: &store}
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out, err := json.MarshalIndent(&db, "", "\t")
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if err != nil {
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log.Fatalln(err)
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}
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fmt.Println(string(out))
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// store.discount(.5)
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// fmt.Print(store)
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*/
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var store list
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db := database{list: &store}
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db.register("book", new(book))
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db.register("game", new(game))
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db.register("puzzle", new(puzzle))
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db.register("toy", new(toy))
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// load from a file
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// f, _ := os.Open("database.json")
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// db.load(f)
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// f.Close()
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// load from a string
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// const data = `[
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// { "Type": "book", "Item": { "Title": "1984", "Price": 8, "Published": -649641600 } },
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// { "Type": "game", "Item": { "Title": "paperboy", "Price": 20 } }]`
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// r := strings.NewReader(data)
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// db.load(r)
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// load from a web server
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// res, _ := http.Get("https://inancgumus.github.io/x/database.json")
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// db.load(res.Body)
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// res.Body.Close()
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// decompress the reader while reading from it
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// res, _ := http.Get("https://inancgumus.github.io/x/database.json.gz")
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// gr, _ := gzip.NewReader(res.Body)
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// db.load(gr)
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// gr.Close()
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// res.Body.Close()
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// decompress and count the number of compressed bytes read
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// res, _ := http.Get("https://inancgumus.github.io/x/database.json.gz")
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// c := newCounter(res.Body) // count the bytes read
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// gr, _ := gzip.NewReader(c)
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// db.load(gr)
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// fmt.Printf("%d bytes read.\n\n", c.total())
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// gr.Close()
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// res.Body.Close()
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// count the number of compressed bytes read from the web server then decompress
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res, _ := http.Get("https://inancgumus.github.io/x/database.json.gz")
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gr, _ := gzip.NewReader(res.Body)
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c := newCounter(gr)
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db.load(c)
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fmt.Printf("%d bytes read.\n\n", c.total())
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gr.Close()
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res.Body.Close()
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fmt.Print(store)
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}
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