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Initial commit

This commit is contained in:
Lauri Võsandi 2021-05-25 23:28:00 +03:00
commit d1bc505cb4
4 changed files with 211 additions and 0 deletions

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FROM golang:1.16-alpine
RUN apk add libcap git
WORKDIR $GOPATH/src/git.k-space.ee/pinecrypt/goredirect
COPY go.mod .
RUN go mod download
COPY main.go .
RUN go build -o goredirect main.go
RUN setcap 'cap_net_bind_service=+ep' goredirect
CMD ["./goredirect"]

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module git.k-space.ee/pinecrypt/goredns
go 1.15
require (
go.mongodb.org/mongo-driver v1.4.6
golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550 // indirect
)

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gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

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main.go Normal file
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package main
import (
"context"
"log"
"os"
"regexp"
"time"
"net/http"
"go.mongodb.org/mongo-driver/bson"
"go.mongodb.org/mongo-driver/mongo"
"go.mongodb.org/mongo-driver/mongo/options"
)
type ShortenerAttr struct {
Slug string
URL string
}
type Elem struct {
Shortener ShortenerAttr
}
var reValid = regexp.MustCompile(os.Getenv("GOREDIRECT_REGEX"))
var mongoUri string = os.Getenv("MONGO_URI")
var databaseName string = os.Getenv("GOREDIRECT_DATABASE")
var collectionName string = os.Getenv("GOREDIRECT_COLLECTION")
var redirectFound string = os.Getenv("GOREDIRECT_NOT_FOUND")
var redirectNotFound string = os.Getenv("GOREDIRECT_NOT_FOUND")
func wrapper(coll *mongo.Collection) func (w http.ResponseWriter, r *http.Request) {
return func(w http.ResponseWriter, r *http.Request) {
slug := r.URL.Path[1:]
match := reValid.MatchString(slug)
if (!match) {
w.WriteHeader(400)
}
var elem Elem
if err := coll.FindOne(context.TODO(), bson.M{"shortener.slug": slug}).Decode(&elem); err != nil {
log.Fatal(err)
}
log.Printf("Redirecting %s to %s\n", slug, elem.Shortener.URL)
http.Redirect(w, r, elem.Shortener.URL, 302)
}
}
func main() {
client, err := mongo.NewClient(options.Client().ApplyURI(mongoUri))
if err != nil {
log.Fatal(err)
}
ctx, _ := context.WithTimeout(context.Background(), 10*time.Second)
err = client.Connect(ctx)
if err != nil {
log.Fatal(err)
}
coll := client.Database(databaseName).Collection(collectionName)
defer client.Disconnect(ctx)
http.HandleFunc("/", wrapper(coll))
log.Printf("Starting HTTP server\n")
err2 := http.ListenAndServe(":80", nil)
if err2 != nil {
log.Fatal("ListenAndServe: ", err2)
}
}