85 lines
2.6 KiB
Go
85 lines
2.6 KiB
Go
package upload
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import (
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"bytes"
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"context"
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"fmt"
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"io/ioutil"
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"mime/multipart"
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"net/http"
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"github.com/golang-jwt/jwt/v4"
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"gitlab.com/gitlab-org/gitlab/workhorse/internal/api"
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"gitlab.com/gitlab-org/gitlab/workhorse/internal/helper"
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"gitlab.com/gitlab-org/gitlab/workhorse/internal/upload/destination"
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"gitlab.com/gitlab-org/gitlab/workhorse/internal/upload/exif"
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"gitlab.com/gitlab-org/gitlab/workhorse/internal/zipartifacts"
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)
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const RewrittenFieldsHeader = "Gitlab-Workhorse-Multipart-Fields"
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type PreAuthorizer interface {
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PreAuthorizeHandler(next api.HandleFunc, suffix string) http.Handler
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}
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type MultipartClaims struct {
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RewrittenFields map[string]string `json:"rewritten_fields"`
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jwt.StandardClaims
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}
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// MultipartFormProcessor abstracts away implementation differences
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// between generic MIME multipart file uploads and CI artifact uploads.
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type MultipartFormProcessor interface {
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ProcessFile(ctx context.Context, formName string, file *destination.FileHandler, writer *multipart.Writer) error
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ProcessField(ctx context.Context, formName string, writer *multipart.Writer) error
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Finalize(ctx context.Context) error
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Name() string
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Count() int
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}
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// interceptMultipartFiles is the core of the implementation of
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// Multipart.
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func interceptMultipartFiles(w http.ResponseWriter, r *http.Request, h http.Handler, preauth *api.Response, filter MultipartFormProcessor, opts *destination.UploadOpts) {
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var body bytes.Buffer
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writer := multipart.NewWriter(&body)
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defer writer.Close()
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// Rewrite multipart form data
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err := rewriteFormFilesFromMultipart(r, writer, preauth, filter, opts)
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if err != nil {
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switch err {
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case ErrInjectedClientParam:
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helper.CaptureAndFail(w, r, err, "Bad Request", http.StatusBadRequest)
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case ErrTooManyFilesUploaded:
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helper.CaptureAndFail(w, r, err, err.Error(), http.StatusBadRequest)
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case http.ErrNotMultipart:
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h.ServeHTTP(w, r)
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case destination.ErrEntityTooLarge:
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helper.RequestEntityTooLarge(w, r, err)
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case zipartifacts.ErrBadMetadata:
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helper.RequestEntityTooLarge(w, r, err)
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case exif.ErrRemovingExif:
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helper.CaptureAndFail(w, r, err, "Failed to process image", http.StatusUnprocessableEntity)
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default:
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helper.Fail500(w, r, fmt.Errorf("handleFileUploads: extract files from multipart: %v", err))
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}
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return
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}
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// Close writer
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writer.Close()
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// Hijack the request
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r.Body = ioutil.NopCloser(&body)
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r.ContentLength = int64(body.Len())
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r.Header.Set("Content-Type", writer.FormDataContentType())
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if err := filter.Finalize(r.Context()); err != nil {
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helper.Fail500(w, r, fmt.Errorf("handleFileUploads: Finalize: %v", err))
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return
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}
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// Proxy the request
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h.ServeHTTP(w, r)
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}
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