88 lines
2.0 KiB
Go
88 lines
2.0 KiB
Go
package s3browser
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import (
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"context"
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"fmt"
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"io"
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"mime"
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"net/http"
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"path/filepath"
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"github.com/graphql-go/graphql"
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"github.com/graphql-go/handler"
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"github.com/minio/minio-go/v7"
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)
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// initHttp setup and start the http server. Blocking
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func initHttp(schema graphql.Schema, resolveContext context.Context) {
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h := handler.New(&handler.Config{
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Schema: &schema,
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Pretty: true,
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GraphiQL: false,
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Playground: true,
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})
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s3Client := resolveContext.Value("s3Client").(*minio.Client)
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http.HandleFunc("/graphql", func(rw http.ResponseWriter, r *http.Request) {
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h.ContextHandler(resolveContext, rw, r)
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})
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http.HandleFunc("/api/file", func(rw http.ResponseWriter, r *http.Request) {
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if r.Method == "GET" {
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httpGetFile(rw, r, s3Client)
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return
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}
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if r.Method == "POST" {
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httpPostFile(rw, r, s3Client)
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return
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}
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})
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http.ListenAndServe(":8080", nil)
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}
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func httpGetFile(rw http.ResponseWriter, r *http.Request, s3Client *minio.Client) {
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id := r.URL.Query().Get("id")
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objInfo, err := s3Client.StatObject(context.Background(), bucketName, id, minio.GetObjectOptions{})
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if err != nil {
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rw.WriteHeader(500)
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return
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}
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reqEtag := r.Header.Get("If-None-Match")
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if reqEtag == objInfo.ETag {
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rw.WriteHeader(304)
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return
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}
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obj, err := s3Client.GetObject(context.Background(), bucketName, id, minio.GetObjectOptions{})
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if err != nil {
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rw.WriteHeader(500)
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return
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}
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rw.Header().Set("Cache-Control", "must-revalidate")
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rw.Header().Set("Content-Disposition", fmt.Sprintf("attachment; filename=\"%s\"", filepath.Base((objInfo.Key))))
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rw.Header().Set("Content-Type", objInfo.ContentType)
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rw.Header().Set("ETag", objInfo.ETag)
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io.Copy(rw, obj)
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}
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func httpPostFile(rw http.ResponseWriter, r *http.Request, s3Client *minio.Client) {
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contentType := r.Header.Get("Content-Type")
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mimeType, err, _ := mime.ParseMediaType(contentType)
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if mimeType != "multipart/form-data" || err != nil {
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rw.WriteHeader(400)
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return
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}
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r.ParseMultipartForm(10 << 20)
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}
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