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files.go
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files.go
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package coderd
import (
"crypto/sha256"
"database/sql"
"encoding/hex"
"errors"
"fmt"
"io"
"net/http"
"github.com/go-chi/chi/v5"
"github.com/google/uuid"
"github.com/coder/coder/coderd/database"
"github.com/coder/coder/coderd/httpapi"
"github.com/coder/coder/coderd/httpmw"
"github.com/coder/coder/coderd/rbac"
"github.com/coder/coder/codersdk"
)
const (
tarMimeType = "application/x-tar"
)
// @Summary Upload file
// @Description Swagger notice: Swagger 2.0 doesn't support file upload with a `content-type` different than `application/x-www-form-urlencoded`.
// @ID upload-file
// @Security CoderSessionToken
// @Produce json
// @Accept application/x-tar
// @Tags Files
// @Param Content-Type header string true "Content-Type must be `application/x-tar`" default(application/x-tar)
// @Param file formData file true "File to be uploaded"
// @Success 201 {object} codersdk.UploadResponse
// @Router /files [post]
func (api *API) postFile(rw http.ResponseWriter, r *http.Request) {
ctx := r.Context()
apiKey := httpmw.APIKey(r)
// This requires the site wide action to create files.
// Once created, a user can read their own files uploaded
if !api.Authorize(r, rbac.ActionCreate, rbac.ResourceFile.WithOwner(apiKey.UserID.String())) {
httpapi.Forbidden(rw)
return
}
contentType := r.Header.Get("Content-Type")
switch contentType {
case tarMimeType:
default:
httpapi.Write(ctx, rw, http.StatusBadRequest, codersdk.Response{
Message: fmt.Sprintf("Unsupported content type header %q.", contentType),
})
return
}
r.Body = http.MaxBytesReader(rw, r.Body, 10*(10<<20))
data, err := io.ReadAll(r.Body)
if err != nil {
httpapi.Write(ctx, rw, http.StatusBadRequest, codersdk.Response{
Message: "Failed to read file from request.",
Detail: err.Error(),
})
return
}
hashBytes := sha256.Sum256(data)
hash := hex.EncodeToString(hashBytes[:])
file, err := api.Database.GetFileByHashAndCreator(ctx, database.GetFileByHashAndCreatorParams{
Hash: hash,
CreatedBy: apiKey.UserID,
})
if err == nil {
// The file already exists!
httpapi.Write(ctx, rw, http.StatusOK, codersdk.UploadResponse{
ID: file.ID,
})
return
} else if !errors.Is(err, sql.ErrNoRows) {
httpapi.Write(ctx, rw, http.StatusInternalServerError, codersdk.Response{
Message: "Internal error getting file.",
Detail: err.Error(),
})
return
}
id := uuid.New()
file, err = api.Database.InsertFile(ctx, database.InsertFileParams{
ID: id,
Hash: hash,
CreatedBy: apiKey.UserID,
CreatedAt: database.Now(),
Mimetype: contentType,
Data: data,
})
if err != nil {
httpapi.Write(ctx, rw, http.StatusInternalServerError, codersdk.Response{
Message: "Internal error saving file.",
Detail: err.Error(),
})
return
}
httpapi.Write(ctx, rw, http.StatusCreated, codersdk.UploadResponse{
ID: file.ID,
})
}
// @Summary Get file by ID
// @ID get-file-by-id
// @Security CoderSessionToken
// @Tags Files
// @Param fileID path string true "File ID" format(uuid)
// @Success 200
// @Router /files/{fileID} [get]
func (api *API) fileByID(rw http.ResponseWriter, r *http.Request) {
ctx := r.Context()
fileID := chi.URLParam(r, "fileID")
if fileID == "" {
httpapi.Write(ctx, rw, http.StatusBadRequest, codersdk.Response{
Message: "File id must be provided in url.",
})
return
}
id, err := uuid.Parse(fileID)
if err != nil {
httpapi.Write(ctx, rw, http.StatusBadRequest, codersdk.Response{
Message: "File id must be a valid UUID.",
})
return
}
file, err := api.Database.GetFileByID(ctx, id)
if errors.Is(err, sql.ErrNoRows) {
httpapi.ResourceNotFound(rw)
return
}
if err != nil {
httpapi.Write(ctx, rw, http.StatusInternalServerError, codersdk.Response{
Message: "Internal error fetching file.",
Detail: err.Error(),
})
return
}
if !api.Authorize(r, rbac.ActionRead, file) {
// Return 404 to not leak the file exists
httpapi.ResourceNotFound(rw)
return
}
rw.Header().Set("Content-Type", file.Mimetype)
rw.WriteHeader(http.StatusOK)
_, _ = rw.Write(file.Data)
}