siteworxpro/top-wallpaper
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Ron Rise
2025-02-15 21:33:54 -05:00
commit aa7fd1cdb7
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.gitignore vendored Normal file
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.idea/
top-wallpaper

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Dockerfile Normal file
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FROM siteworxpro/golang:1.23.5 AS build
WORKDIR /app
ADD . .
ENV GOPRIVATE=git.s.int
ENV GOPROXY=direct
ENV CGO_ENABLED=0
RUN go mod tidy && go build -o top-wallpaper .
FROM alpine:latest AS runtime
EXPOSE 8080
WORKDIR /app
COPY --from=build /app/top-wallpaper /app/top-wallpaper
ENTRYPOINT ["/app/top-wallpaper"]

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README.md Normal file
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# Top Wallpaper Image
A simple app that fetches the top wallpaper image from [/r/wallpaper](https://reddit.com/r/wallpaper) and serves it as a wallpaper.
## Installation
```bash
go mod tidy
go build
```
## Usage
```bash
./top-wallpaper
```
[http://localhost:8080](http://localhost:8080) will serve the top wallpaper image.
Available environment variables:
```
REDIS_URL: Redis URL (default: localhost)
REDIS_PORT: Redis port (default: 6379)
REDIS_PASSWORD: Redis password (default: "")
REDIS_DB: Redis database (default: 0)
ALLOWED_ORIGINS: Allowed origins for CORS (default: "")
PATH: Path to serve the image (default: /)
PORT: Port to serve the image (default: 8080)
```
## docker
```shell
docker run -d -p 8080:8080 --name top-wallpaper -e REDIS_URL=redis -e REDIS_PORT=6379 -e REDIS_PASSWORD=pass -e REDIS_DB=0 -e ALLOWED_ORIGINS=http://localhost:8080 -e PATH=/wallpaper -e PORT=8080 --network=host --restart=always siteworxpro/top-wallpaper:latest
```
## License
[MIT](https://choosealicense.com/licenses/mit/)
```
MIT License
Copyright (c) 2025 Siteworx Professionals, LLC
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
```

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go.mod Normal file
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module github.com/siteworxpro/top-wallpaper
go 1.23.5
require (
github.com/labstack/echo/v4 v4.13.3
github.com/redis/go-redis/v9 v9.7.0
)
require (
github.com/cespare/xxhash/v2 v2.2.0 // indirect
github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f // indirect
github.com/labstack/gommon v0.4.2 // indirect
github.com/mattn/go-colorable v0.1.13 // indirect
github.com/mattn/go-isatty v0.0.20 // indirect
github.com/valyala/bytebufferpool v1.0.0 // indirect
github.com/valyala/fasttemplate v1.2.2 // indirect
golang.org/x/crypto v0.31.0 // indirect
golang.org/x/net v0.33.0 // indirect
golang.org/x/sys v0.28.0 // indirect
golang.org/x/text v0.21.0 // indirect
golang.org/x/time v0.8.0 // indirect
)

43
go.sum Normal file
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github.com/bsm/ginkgo/v2 v2.12.0 h1:Ny8MWAHyOepLGlLKYmXG4IEkioBysk6GpaRTLC8zwWs=
github.com/bsm/ginkgo/v2 v2.12.0/go.mod h1:SwYbGRRDovPVboqFv0tPTcG1sN61LM1Z4ARdbAV9g4c=
github.com/bsm/gomega v1.27.10 h1:yeMWxP2pV2fG3FgAODIY8EiRE3dy0aeFYt4l7wh6yKA=
github.com/bsm/gomega v1.27.10/go.mod h1:JyEr/xRbxbtgWNi8tIEVPUYZ5Dzef52k01W3YH0H+O0=
github.com/cespare/xxhash/v2 v2.2.0 h1:DC2CZ1Ep5Y4k3ZQ899DldepgrayRUGE6BBZ/cd9Cj44=
github.com/cespare/xxhash/v2 v2.2.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f h1:lO4WD4F/rVNCu3HqELle0jiPLLBs70cWOduZpkS1E78=
github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f/go.mod h1:cuUVRXasLTGF7a8hSLbxyZXjz+1KgoB3wDUb6vlszIc=
github.com/labstack/echo/v4 v4.13.3 h1:pwhpCPrTl5qry5HRdM5FwdXnhXSLSY+WE+YQSeCaafY=
github.com/labstack/echo/v4 v4.13.3/go.mod h1:o90YNEeQWjDozo584l7AwhJMHN0bOC4tAfg+Xox9q5g=
github.com/labstack/gommon v0.4.2 h1:F8qTUNXgG1+6WQmqoUWnz8WiEU60mXVVw0P4ht1WRA0=
github.com/labstack/gommon v0.4.2/go.mod h1:QlUFxVM+SNXhDL/Z7YhocGIBYOiwB0mXm1+1bAPHPyU=
github.com/mattn/go-colorable v0.1.13 h1:fFA4WZxdEF4tXPZVKMLwD8oUnCTTo08duU7wxecdEvA=
github.com/mattn/go-colorable v0.1.13/go.mod h1:7S9/ev0klgBDR4GtXTXX8a3vIGJpMovkB8vQcUbaXHg=
github.com/mattn/go-isatty v0.0.16/go.mod h1:kYGgaQfpe5nmfYZH+SKPsOc2e4SrIfOl2e/yFXSvRLM=
github.com/mattn/go-isatty v0.0.20 h1:xfD0iDuEKnDkl03q4limB+vH+GxLEtL/jb4xVJSWWEY=
github.com/mattn/go-isatty v0.0.20/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
github.com/redis/go-redis/v9 v9.7.0 h1:HhLSs+B6O021gwzl+locl0zEDnyNkxMtf/Z3NNBMa9E=
github.com/redis/go-redis/v9 v9.7.0/go.mod h1:f6zhXITC7JUJIlPEiBOTXxJgPLdZcA93GewI7inzyWw=
github.com/stretchr/testify v1.10.0 h1:Xv5erBjTwe/5IxqUQTdXv5kgmIvbHo3QQyRwhJsOfJA=
github.com/stretchr/testify v1.10.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
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/fasttemplate v1.2.2 h1:lxLXG0uE3Qnshl9QyaK6XJxMXlQZELvChBOCmQD0Loo=
github.com/valyala/fasttemplate v1.2.2/go.mod h1:KHLXt3tVN2HBp8eijSv/kGJopbvo7S+qRAEEKiv+SiQ=
golang.org/x/crypto v0.31.0 h1:ihbySMvVjLAeSH1IbfcRTkD/iNscyz8rGzjF/E5hV6U=
golang.org/x/crypto v0.31.0/go.mod h1:kDsLvtWBEx7MV9tJOj9bnXsPbxwJQ6csT/x4KIN4Ssk=
golang.org/x/net v0.33.0 h1:74SYHlV8BIgHIFC/LrYkOGIwL19eTYXQ5wc6TBuO36I=
golang.org/x/net v0.33.0/go.mod h1:HXLR5J+9DxmrqMwG9qjGCxZ+zKXxBru04zlTvWlWuN4=
golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.28.0 h1:Fksou7UEQUWlKvIdsqzJmUmCX3cZuD2+P3XyyzwMhlA=
golang.org/x/sys v0.28.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
golang.org/x/text v0.21.0 h1:zyQAAkrwaneQ066sspRyJaG9VNi/YJ1NfzcGB3hZ/qo=
golang.org/x/text v0.21.0/go.mod h1:4IBbMaMmOPCJ8SecivzSH54+73PCFmPWxNTLm+vZkEQ=
golang.org/x/time v0.8.0 h1:9i3RxcPv3PZnitoVGMPDKZSq1xW1gK1Xy3ArNOGZfEg=
golang.org/x/time v0.8.0/go.mod h1:3BpzKBy/shNhVucY/MWOyx10tF3SFh9QdLuxbVysPQM=
gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

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package main
import (
"context"
"encoding/json"
"fmt"
"github.com/labstack/echo/v4"
"github.com/labstack/echo/v4/middleware"
"github.com/labstack/gommon/log"
"github.com/redis/go-redis/v9"
"io"
"net/http"
"os"
"strconv"
"strings"
"time"
)
type redditResponse struct {
Data struct {
Children []struct {
Data struct {
Kind string `json:"kind"`
Title string `json:"title"`
URL string `json:"url"`
Data struct {
} `json:"data"`
}
} `json:"children"`
} `json:"data"`
}
type CustomContext struct {
echo.Context
redis *redis.Client
}
func main() {
e := echo.New()
e.Logger.SetLevel(log.INFO)
e.HideBanner = true
// Middleware
e.Use(func(next echo.HandlerFunc) echo.HandlerFunc {
return func(c echo.Context) error {
redisUrl := os.Getenv("REDIS_URL")
if redisUrl == "" {
c.Logger().Warn("REDIS_URL not set, skipping redis connection. Use REDIS_URL to cache the image")
return next(&CustomContext{})
}
redisPort := os.Getenv("REDIS_PORT")
if redisPort == "" {
redisPort = "6379"
}
redisDb := os.Getenv("REDIS_DB")
if redisDb == "" {
redisDb = "0"
}
redisDbInt, err := strconv.ParseInt(redisDb, 10, 64)
if err != nil {
c.Logger().Warn("REDIS_DB is not a valid integer, skipping redis connection. Use REDIS_DB to cache the image")
return next(&CustomContext{})
}
cc := &CustomContext{c, redis.NewClient(&redis.Options{
Addr: fmt.Sprintf("%s:%s", redisUrl, redisPort),
Password: os.Getenv("REDIS_PASSWORD"),
DB: int(redisDbInt),
})}
cmd := cc.redis.Ping(context.Background())
if cmd.Err() != nil {
c.Logger().Warn("could not connect to redis")
cc.redis = nil
}
return next(cc)
}
})
e.Use(middleware.Logger())
e.Use(middleware.RequestID())
e.Use(middleware.CORSWithConfig(middleware.CORSConfig{
AllowOrigins: strings.Split(os.Getenv("ALLOWED_ORIGINS"), ","),
AllowHeaders: []string{echo.HeaderOrigin, echo.HeaderContentType, echo.HeaderAccept},
AllowMethods: []string{http.MethodGet, http.MethodOptions},
}))
path := os.Getenv("PATH")
if path == "" {
path = "/"
}
e.GET(path, func(c echo.Context) error {
cc := c.(*CustomContext)
latestImage := cc.redis.Get(context.TODO(), "latestImage")
latestImageVal, err := latestImage.Result()
if err != nil || latestImageVal == "" {
c.Logger().Info("Fetching latest image")
latestImageVal = getLatestImage()
cmd := cc.redis.Set(context.TODO(), "latestImage", latestImageVal, 600*time.Second)
if cmd.Err() != nil {
c.Logger().Warn("could not cache image")
}
} else {
c.Logger().Info("Image name fetched from cache")
}
latestImageBin := cc.redis.Get(context.TODO(), "latestImage:bin:"+latestImageVal)
imageData := latestImageBin.Val()
if imageData == "" {
response, err := http.Get(latestImageVal)
if err != nil {
return c.String(http.StatusInternalServerError, "Error fetching image")
}
defer func(Body io.ReadCloser) {
_ = Body.Close()
}(response.Body)
imageDataBytes, err := io.ReadAll(response.Body)
if err != nil {
return c.String(http.StatusInternalServerError, "Error fetching image")
}
imageData = string(imageDataBytes)
go func(data string) {
_, err = cc.redis.Set(context.TODO(), "latestImage:bin:"+latestImageVal, data, 600*time.Second).Result()
if err != nil {
c.Logger().Warn("could not cache image")
}
}(imageData)
} else {
c.Logger().Info("Image data fetched from cache")
}
c.Response().Header().Set("Cache-Control", "public, max-age=600")
return c.Blob(http.StatusOK, "image/jpeg", []byte(imageData))
})
e.Logger.Info("Starting server at path " + path)
// start the server
port := os.Getenv("PORT")
if port == "" {
port = "8080"
}
e.Logger.Fatal(e.Start(":" + port))
}
func getLatestImage() string {
response, err := http.Get("https://www.reddit.com/r/wallpaper/.json")
if err != nil {
panic(err)
}
defer func(Body io.ReadCloser) {
_ = Body.Close()
}(response.Body)
jsonBytes, err := io.ReadAll(response.Body)
redditData := redditResponse{}
err = json.Unmarshal(jsonBytes, &redditData)
if err != nil {
panic(err)
}
url := redditData.Data.Children[1].Data.URL
return url
}