feat: Initial commit

go.mod

@@ -0,0 +1,8 @@
+module git.ddd.rip/ptrcnull/pkgs
+
+go 1.15
+
+require (
+	github.com/gofiber/fiber/v2 v2.12.0
+	golang.org/x/net v0.0.0-20210510120150-4163338589ed
+)

go.sum

@@ -0,0 +1,25 @@
+github.com/andybalholm/brotli v1.0.2 h1:JKnhI/XQ75uFBTiuzXpzFrUriDPiZjlOSzh6wXogP0E=
+github.com/andybalholm/brotli v1.0.2/go.mod h1:loMXtMfwqflxFJPmdbJO0a3KNoPuLBgiu3qAvBg8x/Y=
+github.com/gofiber/fiber/v2 v2.12.0 h1:R7FVMs9mtMREjfCzCioh2j8RHwhz0/H+X0rH6BpBkJ4=
+github.com/gofiber/fiber/v2 v2.12.0/go.mod h1:oZTLWqYnqpMMuF922SjGbsYZsdpE1MCfh416HNdweIM=
+github.com/golang/snappy v0.0.3/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
+github.com/klauspost/compress v1.12.2 h1:2KCfW3I9M7nSc5wOqXAlW2v2U6v+w6cbjvbfp+OykW8=
+github.com/klauspost/compress v1.12.2/go.mod h1:8dP1Hq4DHOhN9w426knH3Rhby4rFm6D8eO+e+Dq5Gzg=
+github.com/valyala/bytebufferpool v1.0.0 h1:GqA5TC/0021Y/b9FG4Oi9Mr3q7XYx6KllzawFIhcdPw=
+github.com/valyala/bytebufferpool v1.0.0/go.mod h1:6bBcMArwyJ5K/AmCkWv1jt77kVWyCJ6HpOuEn7z0Csc=
+github.com/valyala/fasthttp v1.26.0 h1:k5Tooi31zPG/g8yS6o2RffRO2C9B9Kah9SY8j/S7058=
+github.com/valyala/fasthttp v1.26.0/go.mod h1:cmWIqlu99AO/RKcp1HWaViTqc57FswJOfYYdPJBl8BA=
+github.com/valyala/tcplisten v1.0.0 h1:rBHj/Xf+E1tRGZyWIWwJDiRY0zc1Js+CV5DqwacVSA8=
+github.com/valyala/tcplisten v1.0.0/go.mod h1:T0xQ8SeCZGxckz9qRXTfG43PvQ/mcWh7FwZEA7Ioqkc=
+golang.org/x/crypto v0.0.0-20210513164829-c07d793c2f9a/go.mod h1:P+XmwS30IXTQdn5tA2iutPOUgjI07+tq3H3K9MVA1s8=
+golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
+golang.org/x/net v0.0.0-20210510120150-4163338589ed h1:p9UgmWI9wKpfYmgaV/IZKGdXc5qEK45tDwwwDyjS26I=
+golang.org/x/net v0.0.0-20210510120150-4163338589ed/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
+golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210514084401-e8d321eab015 h1:hZR0X1kPW+nwyJ9xRxqZk1vx5RUObAPBdKVvXPDUH/E=
+golang.org/x/sys v0.0.0-20210514084401-e8d321eab015/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
+golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
+golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
+golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=

main.go

@@ -0,0 +1,49 @@
+package main
+
+import (
+	"fmt"
+	"git.ddd.rip/ptrcnull/pkgs/utils"
+	"github.com/gofiber/fiber/v2"
+	"net/http"
+)
+
+func main() {
+	app := fiber.New()
+
+	app.Get("/:file", func(ctx *fiber.Ctx) error {
+		file := ctx.Params("file")
+
+		res, err := http.Get("https://pkgs.alpinelinux.org/contents?file=" + file + "&path=&name=&branch=&arch=x86_64")
+		if err != nil {
+			return err
+		}
+
+		node, err := utils.Parse(res.Body)
+		if err != nil {
+			return err
+		}
+
+		tbody := node.QuerySelector("tbody")
+		if tbody == nil {
+			return fmt.Errorf("cannot find tbody")
+		}
+
+		//log.Println(tbody.Render())
+
+		reply := ""
+		tbody.ForEach(func(row *utils.Node) {
+			cells := row.Children()
+			if len(cells) == 0 {
+				return
+			}
+			if len(cells) == 3 {
+				reply = "Not found :("
+			}
+			reply += cells[1].Text() + "\n" + cells[0].Text() + "\n\n"
+		})
+
+		return ctx.SendString(reply)
+	})
+
+	panic(app.Listen(":8080"))
+}

utils/html.go

@@ -0,0 +1,154 @@
+package utils
+
+import (
+	"bytes"
+	"golang.org/x/net/html"
+	"io"
+	"strings"
+)
+
+type Node struct {
+	*html.Node
+}
+
+func Parse(r io.Reader) (*Node, error) {
+	n, err := html.Parse(r)
+	if err != nil {
+		return nil, err
+	}
+	return &Node{n}, nil
+}
+
+func (n *Node) QuerySelector(selector string) *Node {
+	if strings.HasPrefix(selector, "#") {
+		return n.GetElementById(selector[1:])
+	}
+	if strings.HasPrefix(selector, ".") {
+		return n.GetElementByClass(selector[1:])
+	}
+	return n.GetElementByTagName(selector)
+}
+
+func (n *Node) GetElementById(id string) *Node {
+	return n.FindOne(func(n *Node) bool {
+		return n.HasAttr("id", id)
+	})
+}
+
+func (n *Node) GetElementByClass(class string) *Node {
+	return n.FindOne(func(n *Node) bool {
+		return n.HasClass(class)
+	})
+}
+
+func (n *Node) GetElementByTagName(name string) *Node {
+	return n.FindOne(func (n *Node) bool {
+		return n.Type == html.ElementNode && n.Data == name
+	})
+}
+
+func (n *Node) HasClass(class string) bool {
+	return n.HasAttr("class", class)
+}
+
+func (n *Node) GetAttr(key string) []string {
+	var res []string
+	for _, attr := range n.Attr {
+		if attr.Key == key {
+			res = append(res, attr.Val)
+		}
+	}
+	return res
+}
+
+func (n *Node) HasAttr(key, value string) bool {
+	for _, attr := range n.Attr {
+		if attr.Key == key && attr.Val == value {
+			return true
+		}
+	}
+	return false
+}
+
+func (n *Node) ForEach(cb func (n *Node)) {
+	for c := n.FirstChild; c != nil; c = c.NextSibling {
+		cb(&Node{c})
+	}
+}
+
+func (n *Node) ChildNodes() []*Node {
+	var res []*Node
+	n.ForEach(func(n *Node) {
+		res = append(res, n)
+	})
+	return res
+}
+
+func (n *Node) Children() []*Node {
+	var res []*Node
+	n.ForEach(func(n *Node) {
+		if n.Type == html.ElementNode {
+			res = append(res, n)
+		}
+	})
+	return res
+}
+
+func (n *Node) Traverse(cb func(n *Node)) {
+	var f func(*Node)
+	f = func(n *Node) {
+		cb(n)
+		n.ForEach(f)
+	}
+	f(n)
+}
+
+func (n *Node) FindOne(cb func(n *Node) bool) *Node {
+	var res *Node
+
+	var f func(*Node)
+	f = func(n *Node) {
+		if res != nil {
+			return
+		}
+		if cb(n) {
+			res = n
+			return
+		}
+		n.ForEach(f)
+	}
+	f(n)
+
+	return res
+}
+
+func (n *Node) FindMany(cb func(n *Node) bool) []*Node {
+	var res []*Node
+
+	var f func(*Node)
+	f = func(n *Node) {
+		if cb(n) {
+			res = append(res, n)
+		}
+		n.ForEach(f)
+	}
+	f(n)
+
+	return res
+}
+
+func (n *Node) Text() string {
+	res := ""
+	n.Traverse(func(n *Node) {
+		if n.Type == html.TextNode {
+			res += n.Data
+		}
+	})
+	return res
+}
+
+func (n *Node) Render() (string, error) {
+	w := bytes.NewBuffer([]byte{})
+	err := html.Render(w, n.Node)
+	return w.String(), err
+}