commit a3024346831989c32ae4fd42579ca2542d5f3c61 Author: Djeeberjr Date: Fri Dec 31 01:03:38 2021 +0100 initial commit diff --git a/.drone.yml b/.drone.yml new file mode 100644 index 0000000..40aa6ea --- /dev/null +++ b/.drone.yml @@ -0,0 +1,14 @@ +kind: pipeline +name: default + +steps: +- name: docker + image: plugins/docker + settings: + repo: djeeberjr/s3-proxy + username: djeeberjr + password: + from_secret: DOCKER_HUB_TOKEN +trigger: + branch: + - master diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..fec1144 --- /dev/null +++ b/.gitignore @@ -0,0 +1,10 @@ +* +!.gitignore +!docker-compose.yml +!Dockerfile +!go.mod +!go.sum +!main.go +!.drone.yml +!LICENCE +!README.md \ No newline at end of file diff --git a/Dockerfile b/Dockerfile new file mode 100644 index 0000000..6ee52d2 --- /dev/null +++ b/Dockerfile @@ -0,0 +1,13 @@ +FROM golang as gobuild + +ADD . /build +WORKDIR /build +RUN go build main.go + +FROM gcr.io/distroless/base-debian10 + +COPY --from=gobuild /build/main /s3-proxy + +EXPOSE 3000 + +CMD [ "/s3-proxy" ] diff --git a/LICENCE b/LICENCE new file mode 100644 index 0000000..94a9ed0 --- /dev/null +++ b/LICENCE @@ -0,0 +1,674 @@ + GNU GENERAL PUBLIC LICENSE + Version 3, 29 June 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + 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. 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If not, see . + +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: + + Copyright (C) + 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 +parts of the General Public License. Of course, your program's commands +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 +. + + 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 +. diff --git a/README.md b/README.md new file mode 100644 index 0000000..b1838c4 --- /dev/null +++ b/README.md @@ -0,0 +1,19 @@ +A reverse proxy for using S3 buckets as a web server. Behaves like a web server with a filesystem as a backend instaed of a S3 bucket. + +# Usage + +``` +s3-proxy 0.1 +Usage: main --s3-endpoint ENDPOINT --s3-bucket BUCKET [--s3-access-key ACCESS_KEY] [--s3-secret-key SECRET_KEY] [--s3-disable-ssl] [--address ADDRESS] + +Options: + --s3-endpoint ENDPOINT + host[:port] [env: S3_ENDPOINT] + --s3-bucket BUCKET [env: S3_BUCKET] + --s3-access-key ACCESS_KEY [env: S3_ACCESS_KEY] + --s3-secret-key SECRET_KEY [env: S3_SECRET_KEY] + --s3-disable-ssl [default: false, env: S3_DISABLE_SSL] + --address ADDRESS what address to listen on [default: :3000, env: ADDRESS] + --help, -h display this help and exit + --version display version and exit +``` \ No newline at end of file diff --git a/docker-compose.yml b/docker-compose.yml new file mode 100644 index 0000000..7896501 --- /dev/null +++ b/docker-compose.yml @@ -0,0 +1,11 @@ +version: "3" + +services: + s3-proxy: + image: djeeberjr/s3-proxy + build: . + container_name: s3-proxy + environment: + - name=value + ports: + - 3000:3000 \ No newline at end of file diff --git a/go.mod b/go.mod new file mode 100644 index 0000000..23cc0a8 --- /dev/null +++ b/go.mod @@ -0,0 +1,27 @@ +module git.kapelle.org/niklas/s3-proxy + +go 1.17 + +require github.com/minio/minio-go/v7 v7.0.20 + +require ( + github.com/alexflint/go-arg v1.4.2 // indirect + github.com/alexflint/go-scalar v1.0.0 // indirect + github.com/dustin/go-humanize v1.0.0 // indirect + github.com/google/uuid v1.1.1 // indirect + github.com/json-iterator/go v1.1.10 // indirect + github.com/klauspost/compress v1.13.5 // indirect + github.com/klauspost/cpuid v1.3.1 // indirect + github.com/minio/md5-simd v1.1.0 // indirect + github.com/minio/sha256-simd v0.1.1 // indirect + github.com/mitchellh/go-homedir v1.1.0 // indirect + github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect + github.com/modern-go/reflect2 v1.0.1 // indirect + github.com/rs/xid v1.2.1 // indirect + github.com/sirupsen/logrus v1.8.1 // indirect + golang.org/x/crypto v0.0.0-20201216223049-8b5274cf687f // indirect + golang.org/x/net v0.0.0-20200707034311-ab3426394381 // indirect + golang.org/x/sys v0.0.0-20200625212154-ddb9806d33ae // indirect + golang.org/x/text v0.3.3 // indirect + gopkg.in/ini.v1 v1.57.0 // indirect +) diff --git a/go.sum b/go.sum new file mode 100644 index 0000000..397aaa2 --- /dev/null +++ b/go.sum @@ -0,0 +1,60 @@ +github.com/alexflint/go-arg v1.4.2 h1:lDWZAXxpAnZUq4qwb86p/3rIJJ2Li81EoMbTMujhVa0= +github.com/alexflint/go-arg v1.4.2/go.mod h1:9iRbDxne7LcR/GSvEr7ma++GLpdIU1zrghf2y2768kM= +github.com/alexflint/go-scalar v1.0.0 h1:NGupf1XV/Xb04wXskDFzS0KWOLH632W/EO4fAFi+A70= +github.com/alexflint/go-scalar v1.0.0/go.mod h1:GpHzbCOZXEKMEcygYQ5n/aa4Aq84zbxjy3MxYW0gjYw= +github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= +github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= +github.com/dustin/go-humanize v1.0.0 h1:VSnTsYCnlFHaM2/igO1h6X3HA71jcobQuxemgkq4zYo= +github.com/dustin/go-humanize v1.0.0/go.mod h1:HtrtbFcZ19U5GC7JDqmcUSB87Iq5E25KnS6fMYU6eOk= +github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg= +github.com/google/uuid v1.1.1 h1:Gkbcsh/GbpXz7lPftLA3P6TYMwjCLYm83jiFQZF/3gY= +github.com/google/uuid v1.1.1/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo= +github.com/json-iterator/go v1.1.10 h1:Kz6Cvnvv2wGdaG/V8yMvfkmNiXq9Ya2KUv4rouJJr68= +github.com/json-iterator/go v1.1.10/go.mod h1:KdQUCv79m/52Kvf8AW2vK1V8akMuk1QjK/uOdHXbAo4= +github.com/klauspost/compress v1.13.5 h1:9O69jUPDcsT9fEm74W92rZL9FQY7rCdaXVneq+yyzl4= +github.com/klauspost/compress v1.13.5/go.mod h1:/3/Vjq9QcHkK5uEr5lBEmyoZ1iFhe47etQ6QUkpK6sk= +github.com/klauspost/cpuid v1.2.3/go.mod h1:Pj4uuM528wm8OyEC2QMXAi2YiTZ96dNQPGgoMS4s3ek= +github.com/klauspost/cpuid v1.3.1 h1:5JNjFYYQrZeKRJ0734q51WCEEn2huer72Dc7K+R/b6s= +github.com/klauspost/cpuid v1.3.1/go.mod h1:bYW4mA6ZgKPob1/Dlai2LviZJO7KGI3uoWLd42rAQw4= +github.com/minio/md5-simd v1.1.0 h1:QPfiOqlZH+Cj9teu0t9b1nTBfPbyTl16Of5MeuShdK4= +github.com/minio/md5-simd v1.1.0/go.mod h1:XpBqgZULrMYD3R+M28PcmP0CkI7PEMzB3U77ZrKZ0Gw= +github.com/minio/minio-go/v7 v7.0.20 h1:0+Xt1SkCKDgcx5cmo3UxXcJ37u5Gy+/2i/+eQYqmYJw= +github.com/minio/minio-go/v7 v7.0.20/go.mod h1:ei5JjmxwHaMrgsMrn4U/+Nmg+d8MKS1U2DAn1ou4+Do= +github.com/minio/sha256-simd v0.1.1 h1:5QHSlgo3nt5yKOJrC7W8w7X+NFl8cMPZm96iu8kKUJU= +github.com/minio/sha256-simd v0.1.1/go.mod h1:B5e1o+1/KgNmWrSQK08Y6Z1Vb5pwIktudl0J58iy0KM= +github.com/mitchellh/go-homedir v1.1.0 h1:lukF9ziXFxDFPkA1vsr5zpc1XuPDn/wFntq5mG+4E0Y= +github.com/mitchellh/go-homedir v1.1.0/go.mod h1:SfyaCUpYCn1Vlf4IUYiD9fPX4A5wJrkLzIz1N1q0pr0= +github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q= +github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd h1:TRLaZ9cD/w8PVh93nsPXa1VrQ6jlwL5oN8l14QlcNfg= +github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q= +github.com/modern-go/reflect2 v0.0.0-20180701023420-4b7aa43c6742/go.mod h1:bx2lNnkwVCuqBIxFjflWJWanXIb3RllmbCylyMrvgv0= +github.com/modern-go/reflect2 v1.0.1 h1:9f412s+6RmYXLWZSEzVVgPGK7C2PphHj5RJrvfx9AWI= +github.com/modern-go/reflect2 v1.0.1/go.mod h1:bx2lNnkwVCuqBIxFjflWJWanXIb3RllmbCylyMrvgv0= +github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4= +github.com/rs/xid v1.2.1 h1:mhH9Nq+C1fY2l1XIpgxIiUOfNpRBYH1kKcr+qfKgjRc= +github.com/rs/xid v1.2.1/go.mod h1:+uKXf+4Djp6Md1KODXJxgGQPKngRmWyn10oCKFzNHOQ= +github.com/sirupsen/logrus v1.8.1 h1:dJKuHgqk1NNQlqoA6BTlM1Wf9DOH3NBjQyu0h9+AZZE= +github.com/sirupsen/logrus v1.8.1/go.mod h1:yWOB1SBYBC5VeMP7gHvWumXLIWorT60ONWic61uBYv0= +github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME= +github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs= +github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI= +golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w= +golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto= +golang.org/x/crypto v0.0.0-20201216223049-8b5274cf687f h1:aZp0e2vLN4MToVqnjNEYEtrEA8RH8U8FN1CU7JgqsPU= +golang.org/x/crypto v0.0.0-20201216223049-8b5274cf687f/go.mod h1:jdWPYTVW3xRLrWPugEBEK3UY2ZEsg3UU495nc5E+M+I= +golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg= +golang.org/x/net v0.0.0-20200707034311-ab3426394381 h1:VXak5I6aEWmAXeQjA+QSZzlgNrpq9mjcfDemuexIKsU= +golang.org/x/net v0.0.0-20200707034311-ab3426394381/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA= +golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY= +golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= +golang.org/x/sys v0.0.0-20191026070338-33540a1f6037/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= +golang.org/x/sys v0.0.0-20200323222414-85ca7c5b95cd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= +golang.org/x/sys v0.0.0-20200625212154-ddb9806d33ae h1:Ih9Yo4hSPImZOpfGuA4bR/ORKTAbhZo2AbWNRCnevdo= +golang.org/x/sys v0.0.0-20200625212154-ddb9806d33ae/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= +golang.org/x/term v0.0.0-20201117132131-f5c789dd3221/go.mod h1:Nr5EML6q2oocZ2LXRh80K7BxOlk5/8JxuGnuhpl+muw= +golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ= +golang.org/x/text v0.3.3 h1:cokOdA+Jmi5PJGXLlLllQSgYigAEfHXJAERHVMaCc2k= +golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ= +golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ= +gopkg.in/ini.v1 v1.57.0 h1:9unxIsFcTt4I55uWluz+UmL95q4kdJ0buvQ1ZIqVQww= +gopkg.in/ini.v1 v1.57.0/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k= diff --git a/main.go b/main.go new file mode 100644 index 0000000..627767e --- /dev/null +++ b/main.go @@ -0,0 +1,217 @@ +package main + +import ( + "context" + "io" + "log" + "net/http" + "strings" + + "github.com/alexflint/go-arg" + "github.com/minio/minio-go/v7" + "github.com/minio/minio-go/v7/pkg/credentials" +) + +type args struct { + S3Endpoint string `arg:"--s3-endpoint,required,env:S3_ENDPOINT" help:"host[:port]" placeholder:"ENDPOINT"` + S3Bucket string `arg:"--s3-bucket,required,env:S3_BUCKET" placeholder:"BUCKET"` + S3AccessKey string `arg:"--s3-access-key,env:S3_ACCESS_KEY" placeholder:"ACCESS_KEY"` + S3SecretKey string `arg:"--s3-secret-key,env:S3_SECRET_KEY" placeholder:"SECRET_KEY"` + S3DisableSSL bool `arg:"--s3-disable-ssl,env:S3_DISABLE_SSL" default:"false"` + Address string `arg:"--address,env:ADDRESS" default:":3000" help:"what address to listen on" placeholder:"ADDRESS"` +} + +func (args) Version() string { + // TODO + return "s3-proxy 0.1" +} + +var s3Client *minio.Client + +func main() { + // Warning: Shitty code + + var args args + arg.MustParse(&args) + + client, err := newClientFromArgs(args) + + if err != nil { + log.Panicf("Failed to create s3 client: %s", err.Error()) + } + + s3Client = client + + log.Printf("Starting webserver on: %s", args.Address) + + err = http.ListenAndServe(args.Address, http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) { + path := r.URL.Path + + // Only allow GET and HEAD request + if r.Method != http.MethodGet && r.Method != http.MethodHead { + rw.WriteHeader(http.StatusMethodNotAllowed) + return + } + + // Edge case with root "/" + if path == "/" { + succ, err := tryObject(createIndexPath(path), rw, r) + + if err != nil { + handleError(err, rw, r) + return + } + + if !succ { + handle404(rw, r) + return + } + + return + } + + // Edge case with paths ending with "/index.html" + if strings.HasSuffix(path, "/index.html") { + http.Redirect(rw, r, strings.TrimSuffix(path, "index.html"), http.StatusMovedPermanently) + return + } + + // If path ends with "/" + if strings.HasSuffix(path, "/") { + // Try the index file first + succ, err := tryObject(createIndexPath(path), rw, r) + + if err != nil { + handleError(err, rw, r) + return + } + + if succ { + return + } + + // If file without the "/" exists then redirect + if objectExists(r.Context(), strings.TrimSuffix(path, "/")) { + // Redirect + http.Redirect(rw, r, strings.TrimSuffix(path, "/"), http.StatusMovedPermanently) + return + } + + // Else 404 + handle404(rw, r) + return + } else { + // Try file first + succ, err := tryObject(path, rw, r) + + if err != nil { + handleError(err, rw, r) + return + } + + if succ { + return + } + + // If if path + "/" + "index.html" exists then redirect to path + "/" + if objectExists(r.Context(), createIndexPath(path)) { + redirectUrl := path + "/" + http.Redirect(rw, r, redirectUrl, http.StatusMovedPermanently) + return + } + + // else 404 + handle404(rw, r) + return + } + + })) + + if err != nil { + log.Printf("Failed to start webserver: %s", err.Error()) + } +} + +func objectExists(ctx context.Context, key string) bool { + _, err := s3Client.StatObject(ctx, "www", key, minio.GetObjectOptions{}) + response := minio.ToErrorResponse(err) + + return !(response.StatusCode == http.StatusNotFound) +} + +func tryObject(key string, rw http.ResponseWriter, r *http.Request) (bool, error) { + stat, err := s3Client.StatObject(r.Context(), "www", key, minio.GetObjectOptions{}) + + if err != nil { + if is404(err) { + return false, nil + } else { + return false, err + } + } + + reqEtag := r.Header.Get("If-None-Match") + if reqEtag == stat.ETag { + rw.WriteHeader(http.StatusNotModified) + return true, nil + } + + rw.Header().Add("content-type", stat.ContentType) + rw.Header().Add("ETag", stat.ETag) + rw.Header().Add("Server", "Yo mama lol") + + if r.Method == http.MethodGet { + obj, err := s3Client.GetObject(r.Context(), "www", key, minio.GetObjectOptions{}) + + if err != nil { + return false, err + } + + _, err = io.Copy(rw, obj) + + if err != nil { + return false, err + } + } + + return true, nil +} + +func createIndexPath(s string) string { + index := s + + if !strings.HasSuffix(s, "/") { + index += "/" + } + + index += "index.html" + + return index +} + +func handleError(err error, rw http.ResponseWriter, r *http.Request) { + log.Printf("error: %s : %s", r.URL.Path, err.Error()) + rw.WriteHeader(http.StatusInternalServerError) +} + +func handle404(rw http.ResponseWriter, r *http.Request) { + rw.WriteHeader(http.StatusNotFound) +} + +func is404(err error) bool { + resp := minio.ToErrorResponse(err) + return resp.StatusCode == http.StatusNotFound +} + +func newClientFromArgs(args args) (*minio.Client, error) { + if args.S3AccessKey == "" { + return minio.New(args.S3Endpoint, &minio.Options{ + Secure: !args.S3DisableSSL, + }) + } else { + return minio.New(args.S3Endpoint, &minio.Options{ + Secure: !args.S3DisableSSL, + Creds: credentials.NewStaticV4(args.S3AccessKey, args.S3SecretKey, ""), + }) + } +}