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33
.github/workflows/go.yml vendored Normal file
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name: Go
on:
push:
branches: [ "main" ]
pull_request:
branches: [ "main" ]
jobs:
build:
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@v4
- name: Set up Go
uses: actions/setup-go@v4
with:
go-version: '1.25.1'
- name: Cache Go Modules
uses: actions/cache@v3
with:
path: ~/go/pkg/mod
key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
restore-keys: |
${{ runner.os }}-go-
- name: Build
run: go build -v ./...
- name: Test
run: go test -v ./...

64
.github/workflows/image.yml vendored Normal file
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name: Docker
on:
push:
branches: [ "main" ]
env:
REGISTRY: ghcr.io
IMAGE_NAME: ${{ github.repository }}
jobs:
build:
runs-on: ubuntu-latest
permissions:
contents: read
packages: write
id-token: write
steps:
- name: Checkout repository
uses: actions/checkout@v4
- name: Install cosign
if: github.event_name != 'pull_request'
uses: sigstore/cosign-installer@v3.5.0
with:
cosign-release: 'v2.1.1'
- name: Set up Docker Buildx
uses: docker/setup-buildx-action@v3
with:
platforms: linux/amd64,linux/arm64
- name: Log into registry ${{ env.REGISTRY }}
if: github.event_name != 'pull_request'
uses: docker/login-action@v3
with:
registry: ${{ env.REGISTRY }}
username: ${{ github.actor }}
password: ${{ secrets.GITHUB_TOKEN }}
- name: Extract Docker metadata
id: meta
uses: docker/metadata-action@v5
with:
images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
- name: Build and push Docker image
id: build-and-push
uses: docker/build-push-action@v5
with:
context: .
push: ${{ github.event_name != 'pull_request' }}
tags: ${{ steps.meta.outputs.tags }}
labels: ${{ steps.meta.outputs.labels }}
cache-from: type=gha
cache-to: type=gha,mode=max
platforms: linux/amd64,linux/arm64
- name: Sign the published Docker image
if: ${{ github.event_name != 'pull_request' }}
env:
DIGEST: ${{ steps.build-and-push.outputs.digest }}
run: echo "${TAGS}" | xargs -I {} cosign sign --yes {}@${DIGEST}

15
Dockerfile Normal file
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FROM golang:1.25.1-alpine AS builder
RUN apk add --no-cache build-base vips-dev
WORKDIR /app
COPY go.mod go.sum ./
RUN go mod download
COPY . .
RUN CGO_ENABLED=1 go build -ldflags="-s -w" -o /mediaproxy .
FROM alpine:latest
RUN apk add --no-cache vips
RUN adduser -D -g '' appuser
USER appuser
COPY --from=builder /mediaproxy /mediaproxy
EXPOSE 8080
ENTRYPOINT ["/mediaproxy"]

21
compose.dev.yaml Normal file
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services:
mediaproxy:
build: .
container_name: mediaproxy
ports:
- "8080:8080"
# restart: unless-stopped
environment:
- LOG_LEVEL=DEBUG
# - CACHE_TTL=30m
# - ALLOWED_DOMAINS=images.unsplash.com,static.pexels.com,*.example.com
# - DEFAULT_IMAGE_QUALITY=100
# - MAX_ALLOWED_SIZE=10485760
# deploy:
# resources:
# limits:
# cpus: '0.5' # Limit to 50% of a single CPU core
# memory: '256M' # Limit to 256 Megabytes of RAM
# reservations:
# cpus: '0.25'
# memory: '128M'

13
compose.yaml Normal file
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services:
mediaproxy:
image: ghcr.io/skidoodle/mediaproxy
container_name: mediaproxy
ports:
- "8080:8080"
restart: unless-stopped
environment:
- CACHE_TTL=30m
- ALLOWED_DOMAINS=images.unsplash.com,static.pexels.com,*.example.com
- DEFAULT_IMAGE_QUALITY=100
- MAX_ALLOWED_SIZE=10485760
- CLIENT_TIMEOUT=120s

62
env.go Normal file
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package main
import (
"log/slog"
"os"
"strconv"
"strings"
"time"
)
func getEnvLogLevel(key string, fallback slog.Level) slog.Level {
if value, ok := os.LookupEnv(key); ok {
switch strings.ToUpper(value) {
case "DEBUG":
return slog.LevelDebug
case "INFO":
return slog.LevelInfo
case "WARN", "WARNING":
return slog.LevelWarn
case "ERROR", "ERR":
return slog.LevelError
}
}
return fallback
}
func getEnvDuration(key string, fallback time.Duration) time.Duration {
if value, ok := os.LookupEnv(key); ok {
if duration, err := time.ParseDuration(value); err == nil {
return duration
}
}
return fallback
}
func getEnvStringSlice(key string, fallback []string) []string {
if value, ok := os.LookupEnv(key); ok {
if value == "" {
return []string{}
}
return strings.Split(value, ",")
}
return fallback
}
func getEnvInt(key string, fallback int) int {
if value, ok := os.LookupEnv(key); ok {
if i, err := strconv.Atoi(value); err == nil {
return i
}
}
return fallback
}
func getEnvInt64(key string, fallback int64) int64 {
if value, ok := os.LookupEnv(key); ok {
if i, err := strconv.ParseInt(value, 10, 64); err == nil {
return i
}
}
return fallback
}

17
go.mod Normal file
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module mediaproxy
go 1.25.1
require (
github.com/dgraph-io/ristretto v0.2.0
github.com/gabriel-vasile/mimetype v1.4.10
github.com/h2non/bimg v1.1.9
)
require (
github.com/cespare/xxhash/v2 v2.3.0 // indirect
github.com/dustin/go-humanize v1.0.1 // indirect
github.com/pkg/errors v0.9.1 // indirect
github.com/stretchr/testify v1.11.1 // indirect
golang.org/x/sys v0.36.0 // indirect
)

24
go.sum Normal file
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github.com/cespare/xxhash/v2 v2.3.0 h1:UL815xU9SqsFlibzuggzjXhog7bL6oX9BbNZnL2UFvs=
github.com/cespare/xxhash/v2 v2.3.0/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/dgraph-io/ristretto v0.2.0 h1:XAfl+7cmoUDWW/2Lx8TGZQjjxIQ2Ley9DSf52dru4WE=
github.com/dgraph-io/ristretto v0.2.0/go.mod h1:8uBHCU/PBV4Ag0CJrP47b9Ofby5dqWNh4FicAdoqFNU=
github.com/dgryski/go-farm v0.0.0-20200201041132-a6ae2369ad13 h1:fAjc9m62+UWV/WAFKLNi6ZS0675eEUC9y3AlwSbQu1Y=
github.com/dgryski/go-farm v0.0.0-20200201041132-a6ae2369ad13/go.mod h1:SqUrOPUnsFjfmXRMNPybcSiG0BgUW2AuFH8PAnS2iTw=
github.com/dustin/go-humanize v1.0.1 h1:GzkhY7T5VNhEkwH0PVJgjz+fX1rhBrR7pRT3mDkpeCY=
github.com/dustin/go-humanize v1.0.1/go.mod h1:Mu1zIs6XwVuF/gI1OepvI0qD18qycQx+mFykh5fBlto=
github.com/gabriel-vasile/mimetype v1.4.10 h1:zyueNbySn/z8mJZHLt6IPw0KoZsiQNszIpU+bX4+ZK0=
github.com/gabriel-vasile/mimetype v1.4.10/go.mod h1:d+9Oxyo1wTzWdyVUPMmXFvp4F9tea18J8ufA774AB3s=
github.com/h2non/bimg v1.1.9 h1:WH20Nxko9l/HFm4kZCA3Phbgu2cbHvYzxwxn9YROEGg=
github.com/h2non/bimg v1.1.9/go.mod h1:R3+UiYwkK4rQl6KVFTOFJHitgLbZXBZNFh2cv3AEbp8=
github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
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/stretchr/testify v1.11.1 h1:7s2iGBzp5EwR7/aIZr8ao5+dra3wiQyKjjFuvgVKu7U=
github.com/stretchr/testify v1.11.1/go.mod h1:wZwfW3scLgRK+23gO65QZefKpKQRnfz6sD981Nm4B6U=
golang.org/x/sys v0.36.0 h1:KVRy2GtZBrk1cBYA7MKu5bEZFxQk4NIDV6RLVcC8o0k=
golang.org/x/sys v0.36.0/go.mod h1:OgkHotnGiDImocRcuBABYBEXf8A9a87e/uXjp9XT3ks=
gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

107
helper.go Normal file
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package main
import (
"bytes"
"context"
"fmt"
"image/gif"
"log/slog"
"net/http"
"strconv"
"strings"
"time"
"github.com/h2non/bimg"
)
type contextKey string
const loggerKey contextKey = "logger"
type responseWriter struct {
http.ResponseWriter
statusCode int
}
func (rw *responseWriter) WriteHeader(code int) {
rw.statusCode = code
rw.ResponseWriter.WriteHeader(code)
}
// loggingMiddleware injects a contextual logger into the request and logs request metrics.
func loggingMiddleware(next http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
start := time.Now()
requestID := strconv.FormatInt(time.Now().UnixNano(), 36)
logger := slog.With(
"request_id", requestID,
"method", r.Method,
"path", r.URL.Path,
"remote_addr", r.RemoteAddr,
)
ctx := context.WithValue(r.Context(), loggerKey, logger)
rw := &responseWriter{ResponseWriter: w, statusCode: http.StatusOK}
next.ServeHTTP(rw, r.WithContext(ctx))
statusText := fmt.Sprintf("%d %s", rw.statusCode, http.StatusText(rw.statusCode))
logger.Info("Handled request",
"status", statusText,
"duration", time.Since(start).String(),
"user_agent", r.UserAgent(),
)
})
}
// isAllowedType performs a categorical check for 'image/*', 'video/*', and 'audio/*'.
func isAllowedType(mimeType string, allowGeneric bool) bool {
mimeType = strings.Split(mimeType, ";")[0]
category := strings.Split(mimeType, "/")[0]
switch category {
case "image", "video", "audio":
return true
}
// Allow generic binary streams on the initial HEAD request, forcing the
// more reliable content sniffing to make the final decision.
if allowGeneric && mimeType == "application/octet-stream" {
return true
}
return false
}
// isAllowedDomain checks if a host is in the configured whitelist.
func isAllowedDomain(host string, allowedDomains []string) bool {
if len(allowedDomains) == 0 {
return true
}
for _, domain := range allowedDomains {
if host == domain || strings.HasSuffix(host, "."+domain) {
return true
}
}
return false
}
// isGif checks if the provided byte slice represents an animated GIF.
func isGif(data []byte) (bool, error) {
r := bytes.NewReader(data)
g, err := gif.DecodeAll(r)
if err != nil {
return false, err
}
return len(g.Image) > 1, nil
}
// optimizeMedia converts a static image to WebP and applies a quality setting.
func optimizeMedia(data []byte, quality int) ([]byte, error) {
webp, err := bimg.NewImage(data).Convert(bimg.WEBP)
if err != nil {
return nil, fmt.Errorf("failed to convert image to webp: %w", err)
}
processed, err := bimg.NewImage(webp).Process(bimg.Options{Quality: quality})
if err != nil {
return nil, fmt.Errorf("failed to process image quality: %w", err)
}
return processed, nil
}

674
license Normal file
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GNU GENERAL PUBLIC LICENSE
Version 3, 29 June 2007
Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
Preamble
The GNU General Public License is a free, copyleft license for
software and other kinds of works.
The licenses for most software and other practical works are designed
to take away your freedom to share and change the works. By contrast,
the GNU General Public License is intended to guarantee your freedom to
share and change all versions of a program--to make sure it remains free
software for all its users. We, the Free Software Foundation, use the
GNU General Public License for most of our software; it applies also to
any other work released this way by its authors. You can apply it to
your programs, too.
When we speak of free software, we are referring to freedom, not
price. Our General Public Licenses are designed to make sure that you
have the freedom to distribute copies of free software (and charge for
them if you wish), that you receive source code or can get it if you
want it, that you can change the software or use pieces of it in new
free programs, and that you know you can do these things.
To protect your rights, we need to prevent others from denying you
these rights or asking you to surrender the rights. Therefore, you have
certain responsibilities if you distribute copies of the software, or if
you modify it: responsibilities to respect the freedom of others.
For example, if you distribute copies of such a program, whether
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Developers that use the GNU GPL protect your rights with two steps:
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For the developers' and authors' protection, the GPL clearly explains
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Nothing in this License shall be construed as excluding or limiting
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Notwithstanding any other provision of this License, you have
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If the Program specifies that a proxy can decide which future
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END OF TERMS AND CONDITIONS
How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.
To do so, attach the following notices to the program. It is safest
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state the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
This program is free software: you can redistribute it and/or modify
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(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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Also add information on how to contact you by electronic and paper mail.
If the program does terminal interaction, make it output a short
notice like this when it starts in an interactive mode:
<program> Copyright (C) <year> <name of author>
This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
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might be different; for a GUI interface, you would use an "about box".
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
<https://www.gnu.org/licenses/>.
The GNU General Public License does not permit incorporating your program
into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<https://www.gnu.org/licenses/why-not-lgpl.html>.

272
main.go Normal file
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package main
import (
"context"
"errors"
"fmt"
"io"
"log/slog"
"net/http"
"net/url"
"os"
"os/signal"
"strings"
"syscall"
"time"
"github.com/dgraph-io/ristretto"
"github.com/gabriel-vasile/mimetype"
)
type CacheEntry struct {
ContentType string
Data []byte
}
type Config struct {
CacheTTL time.Duration
AllowedDomains []string
MaxAllowedSize int64
DefaultImageQuality int
ClientTimeout time.Duration
LogLevel slog.Level
}
type App struct {
Config *Config
Cache *ristretto.Cache
Client *http.Client
Logger *slog.Logger
}
func main() {
logLevel := getEnvLogLevel("LOG_LEVEL", slog.LevelInfo)
logger := slog.New(slog.NewJSONHandler(os.Stdout, &slog.HandlerOptions{Level: logLevel}))
slog.SetDefault(logger)
config := &Config{
CacheTTL: getEnvDuration("CACHE_TTL", 10*time.Minute),
AllowedDomains: getEnvStringSlice("ALLOWED_DOMAINS", []string{}),
MaxAllowedSize: getEnvInt64("MAX_ALLOWED_SIZE", 1024*1024*50),
DefaultImageQuality: getEnvInt("DEFAULT_IMAGE_QUALITY", 80),
ClientTimeout: getEnvDuration("CLIENT_TIMEOUT", 2*time.Minute),
LogLevel: logLevel,
}
cache, err := ristretto.NewCache(&ristretto.Config{
NumCounters: 1e7, // Number of keys to track frequency of (10M).
MaxCost: 1 << 30, // Maximum cost of cache (1GB).
BufferItems: 64, // Number of keys per Get buffer.
})
if err != nil {
logger.Error("Failed to create Ristretto cache", "error", err)
os.Exit(1)
}
httpClient := &http.Client{
Timeout: config.ClientTimeout,
}
app := &App{
Config: config,
Cache: cache,
Client: httpClient,
Logger: logger,
}
handler := loggingMiddleware(http.HandlerFunc(app.handleProxy))
server := &http.Server{
Addr: ":8080",
Handler: handler,
ReadTimeout: 5 * time.Second,
WriteTimeout: 60 * time.Second,
IdleTimeout: 120 * time.Second,
}
go func() {
quit := make(chan os.Signal, 1)
signal.Notify(quit, syscall.SIGINT, syscall.SIGTERM)
<-quit
logger.Info("Shutting down server...")
ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
defer cancel()
if err := server.Shutdown(ctx); err != nil {
logger.Error("Server forced to shutdown", "error", err)
os.Exit(1)
}
}()
logger.Info("Starting server", "address", server.Addr, "log_level", logLevel.String())
if err := server.ListenAndServe(); err != nil && !errors.Is(err, http.ErrServerClosed) {
logger.Error("Could not start server", "error", err)
os.Exit(1)
}
logger.Info("Server stopped gracefully.")
}
func (app *App) handleProxy(w http.ResponseWriter, r *http.Request) {
ctx := r.Context()
logger := ctx.Value(loggerKey).(*slog.Logger)
mediaURL := r.URL.Path[1:]
if strings.HasPrefix(mediaURL, "https:/") && !strings.HasPrefix(mediaURL, "https://") {
mediaURL = "https://" + mediaURL[6:]
}
if strings.HasPrefix(mediaURL, "http:/") && !strings.HasPrefix(mediaURL, "http://") {
mediaURL = "http://" + mediaURL[5:]
}
logger = logger.With("media_url", mediaURL)
if mediaURL == "" {
http.Error(w, "Media URL is required", http.StatusBadRequest)
return
}
parsedURL, err := url.Parse(mediaURL)
if err != nil || (parsedURL.Scheme != "http" && parsedURL.Scheme != "https") {
logger.Warn("Invalid media URL received", "error", err)
http.Error(w, fmt.Sprintf("Invalid media URL: %s", mediaURL), http.StatusBadRequest)
return
}
if !isAllowedDomain(parsedURL.Host, app.Config.AllowedDomains) {
logger.Warn("Domain not allowed", "domain", parsedURL.Host)
http.Error(w, "Domain not allowed", http.StatusForbidden)
return
}
if value, found := app.Cache.Get(mediaURL); found {
if cachedEntry, ok := value.(CacheEntry); ok {
logger.Debug("Serving image from cache")
w.Header().Set("Content-Type", cachedEntry.ContentType)
w.Write(cachedEntry.Data)
return
}
}
logger.Debug("Cache miss, performing HEAD request to origin")
headResp, err := app.Client.Head(mediaURL)
if err != nil {
logger.Error("Failed to make HEAD request to origin", "error", err)
http.Error(w, "Could not fetch media metadata", http.StatusInternalServerError)
return
}
if headResp.StatusCode != http.StatusOK {
logger.Warn("Origin server returned non-200 status for HEAD request", "status", headResp.StatusCode)
http.Error(w, fmt.Sprintf("Media source returned status: %d", headResp.StatusCode), headResp.StatusCode)
return
}
defer headResp.Body.Close()
headerContentType := headResp.Header.Get("Content-Type")
if !isAllowedType(headerContentType, true) {
logger.Warn("Unsupported content type in header", "content_type", headerContentType)
http.Error(w, fmt.Sprintf("Unsupported content type from header: %s", headerContentType), http.StatusUnsupportedMediaType)
return
}
mediaTypeCategory := strings.Split(headerContentType, "/")[0]
switch mediaTypeCategory {
case "image":
logger.Debug("Delegating to image handler")
app.handleImage(w, r)
case "video", "audio":
logger.Debug("Delegating to stream handler")
app.handleStream(w, r)
default:
logger.Warn("Media type passed initial checks but is not an image, video, or audio", "category", mediaTypeCategory)
http.Error(w, "Unsupported media type", http.StatusUnsupportedMediaType)
}
}
func (app *App) handleImage(w http.ResponseWriter, r *http.Request) {
logger := r.Context().Value(loggerKey).(*slog.Logger)
mediaURL := r.URL.Path[1:]
resp, err := app.Client.Get(mediaURL)
if err != nil {
logger.Error("Failed to fetch image from origin", "error", err)
http.Error(w, "Could not fetch image", http.StatusInternalServerError)
return
}
defer resp.Body.Close()
r.Body = http.MaxBytesReader(w, r.Body, app.Config.MaxAllowedSize)
mediaData, err := io.ReadAll(resp.Body)
if err != nil {
logger.Error("Could not read image data", "error", err)
http.Error(w, "Could not read image data", http.StatusRequestEntityTooLarge)
return
}
mtype := mimetype.Detect(mediaData)
if !strings.HasPrefix(mtype.String(), "image/") {
logger.Warn("Content sniffing detected non-image type after HEAD request", "sniffed_type", mtype.String())
http.Error(w, "Content sniffing detected non-image type", http.StatusUnsupportedMediaType)
return
}
var entryToCache CacheEntry
isAnimated := false
if mtype.Is("image/gif") {
var gifErr error
isAnimated, gifErr = isGif(mediaData)
if gifErr != nil {
logger.Warn("Could not determine GIF animation, treating as static", "error", gifErr)
}
}
if isAnimated {
entryToCache = CacheEntry{ContentType: mtype.String(), Data: mediaData}
} else {
optimizedImage, err := optimizeMedia(mediaData, app.Config.DefaultImageQuality)
if err != nil {
logger.Error("Failed to process image", "error", err)
http.Error(w, "Could not process image", http.StatusInternalServerError)
return
}
entryToCache = CacheEntry{ContentType: "image/webp", Data: optimizedImage}
}
app.Cache.SetWithTTL(mediaURL, entryToCache, 1, app.Config.CacheTTL)
app.Cache.Wait()
w.Header().Set("Content-Type", entryToCache.ContentType)
w.Write(entryToCache.Data)
}
func (app *App) handleStream(w http.ResponseWriter, r *http.Request) {
logger := r.Context().Value(loggerKey).(*slog.Logger)
mediaURL := r.URL.Path[1:]
originReq, err := http.NewRequestWithContext(r.Context(), r.Method, mediaURL, r.Body)
if err != nil {
logger.Error("Failed to create origin request", "error", err)
http.Error(w, "Internal server error", http.StatusInternalServerError)
return
}
originReq.Header = r.Header.Clone()
originResp, err := app.Client.Do(originReq)
if err != nil {
logger.Error("Failed to proxy stream request to origin", "error", err)
http.Error(w, "Bad gateway", http.StatusBadGateway)
return
}
defer originResp.Body.Close()
for key, values := range originResp.Header {
for _, value := range values {
w.Header().Add(key, value)
}
}
w.WriteHeader(originResp.StatusCode)
io.Copy(w, originResp.Body)
}

78
readme.md Normal file
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# mediaproxy
`mediaproxy` is a high-performance, low-resource media proxy written in Go. It intelligently caches and optimizes images, while efficiently streaming video and audio to offload traffic from your origin servers.
## Features
- **Intelligent**: Optimizes static images to WebP, preserves GIF animations, and streams video/audio.
- **High-Performance**: Uses an in-memory cache (ristretto) for instant delivery of hot assets.
- **Low Usage**: Built with Go and `libvips` for minimal CPU and memory footprint.
- **Whitelisting**: Optionally restrict proxying to a specific list of allowed domains.
- **Configurable**: All settings are managed via environment variables for easy deployment.
## Example Usage
The service endpoint is `https://<your-domain>/<full_media_url>`.
## Configuration
The service is configured using environment variables:
| Variable | Description | Default |
| --------------------- | ------------------------------------------------------------ | ---------------- |
| `LOG_LEVEL` | The logging level (`DEBUG`, `INFO`, `WARN`, `ERROR`). | `INFO` |
| `CACHE_TTL` | The duration for which images are cached. | `10m` |
| `ALLOWED_DOMAINS` | Comma-separated list of domains to whitelist. | (empty, all allowed) |
| `MAX_ALLOWED_SIZE` | Maximum media file size in bytes. | `52428800` (50MB)|
| `DEFAULT_IMAGE_QUALITY` | Quality for optimized WebP images (1-100). | `80` |
| `CLIENT_TIMEOUT` | Timeout for fetching media from the origin. | `2m` |
## Running Locally
### With Docker (Recommended)
This is the easiest way to run the service, as it handles the `libvips` dependency automatically.
```sh
git clone https://github.com/skidoodle/mediaproxy
cd mediaproxy
docker compose up -f compose.dev.yaml --build
```
### Without Docker
Requires Go and `libvips` to be installed on your system.
```sh
# Note: You must install libvips first.
# See: https://www.libvips.org/install.html
git clone https://github.com/skidoodle/mediaproxy
cd mediaproxy
go mod tidy
go run .
```
## Deploying
### Docker Compose
Create a `compose.yaml` file with the following content:
```yaml
services:
mediaproxy:
image: ghcr.io/skidoodle/mediaproxy:main
container_name: mediaproxy
restart: unless-stopped
ports:
- "8080:8080"
environment:
LOG_LEVEL: INFO
CACHE_TTL: 1h
ALLOWED_DOMAINS: images.pexels.com,media.giphy.com,videos.pexels.com
```
## License
[GPL-3.0](https://github.com/skidoodle/mediaproxy/blob/main/license)