portal/controller/files.go

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package controller
import (
"bytes"
"encoding/hex"
"errors"
"fmt"
"git.lumeweb.com/LumeWeb/portal/bao"
"git.lumeweb.com/LumeWeb/portal/cid"
"git.lumeweb.com/LumeWeb/portal/db"
"git.lumeweb.com/LumeWeb/portal/model"
"git.lumeweb.com/LumeWeb/portal/renterd"
"github.com/go-resty/resty/v2"
"github.com/kataras/iris/v12"
"io"
"lukechampine.com/blake3"
)
type FilesController struct {
Ctx iris.Context
}
var client *resty.Client
type UploadResponse struct {
Cid string `json:"cid"`
}
func InitFiles() {
client = resty.New()
client.SetBaseURL(renterd.GetApiAddr() + "/api")
client.SetBasicAuth("", renterd.GetAPIPassword())
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client.SetDisableWarn(true)
}
func (f *FilesController) PostUpload() {
ctx := f.Ctx
file, meta, err := f.Ctx.FormFile("file")
if internalErrorCustom(ctx, err, errors.New("invalid file data")) {
return
}
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buf, err := io.ReadAll(file)
if internalError(ctx, err) {
return
}
if internalErrorCustom(ctx, err, errors.New("failed to read file data")) {
return
}
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hashBytes := blake3.Sum256(buf)
hashHex := hex.EncodeToString(hashBytes[:])
fileCid, err := cid.EncodeFixed(hashBytes, uint64(meta.Size))
if internalError(ctx, err) {
return
}
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_, err = file.Seek(0, io.SeekStart)
if internalError(ctx, err) {
return
}
var upload model.Upload
result := db.Get().Where("hash = ?", hashHex).First(&upload)
if (result.Error != nil && result.Error.Error() != "record not found") || result.RowsAffected > 0 {
ctx.JSON(&UploadResponse{Cid: fileCid})
return
}
_, err = file.Seek(0, io.SeekStart)
if internalError(ctx, err) {
return
}
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tree, err := bao.ComputeBaoTree(bytes.NewReader(buf))
if internalError(ctx, err) {
return
}
objectExistsResult, err := client.R().Get(fmt.Sprintf("/worker/objects/%s", hashHex))
if internalError(ctx, err) {
return
}
if objectExistsResult.StatusCode() != 404 {
ctx.JSON(&UploadResponse{Cid: fileCid})
return
}
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if internalError(ctx, err) {
return
}
ret, err := client.R().SetBody(buf).Put(fmt.Sprintf("/worker/objects/%s", hashHex))
if ret.StatusCode() != 200 {
err = errors.New(string(ret.Body()))
}
if internalError(ctx, err) {
return
}
ret, err = client.R().SetBody(tree).Put(fmt.Sprintf("/worker/objects/%s.obao", hashHex))
if ret.StatusCode() != 200 {
err = errors.New(string(ret.Body()))
}
if internalError(ctx, err) {
return
}
upload = model.Upload{
Hash: hashHex,
}
if err := db.Get().Create(&upload).Error; err != nil {
if internalError(ctx, err) {
return
}
}
ctx.JSON(&UploadResponse{Cid: fileCid})
}
func (f *FilesController) GetDownload() {
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ctx := f.Ctx
cidString := ctx.URLParam("cid")
_, err := cid.Valid(cidString)
if sendError(ctx, err, iris.StatusBadRequest) {
return
}
cidObject, _ := cid.Decode(cidString)
hashHex := hex.EncodeToString(cidObject.Hash[:])
result := db.Get().Table("uploads").Where("hash = ?", hashHex).Row()
if result.Err() != nil {
sendError(ctx, result.Err(), iris.StatusNotFound)
return
}
fetch, err := client.R().SetDoNotParseResponse(true).Get(fmt.Sprintf("/worker/objects/%s", hashHex))
if err != nil {
if fetch.StatusCode() == 404 {
sendError(ctx, err, iris.StatusNotFound)
return
}
internalError(ctx, err)
return
}
ctx.Header("Transfer-Encoding", "chunked")
if internalError(ctx, err) {
return
}
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err = ctx.StreamWriter(func(w io.Writer) error {
_, err = io.Copy(w, fetch.RawBody())
_ = fetch.RawBody().Close()
return err
})
internalError(ctx, err)
}
func sendErrorCustom(ctx iris.Context, err error, customError error, irisError int) bool {
if err != nil {
if customError != nil {
err = customError
}
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ctx.StopWithError(irisError, err)
return true
}
return false
}
func internalError(ctx iris.Context, err error) bool {
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return sendErrorCustom(ctx, err, nil, iris.StatusInternalServerError)
}
func internalErrorCustom(ctx iris.Context, err error, customError error) bool {
return sendErrorCustom(ctx, err, customError, iris.StatusInternalServerError)
}
func sendError(ctx iris.Context, err error, irisError int) bool {
return sendErrorCustom(ctx, err, nil, irisError)
}