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|
package buildkit
import (
"io"
"net/http"
"strings"
"sync"
"github.com/moby/buildkit/identity"
"github.com/pkg/errors"
)
const urlPrefix = "build-context-"
type reqBodyHandler struct {
mu sync.Mutex
rt http.RoundTripper
requests map[string]io.ReadCloser
}
func newReqBodyHandler(rt http.RoundTripper) *reqBodyHandler {
return &reqBodyHandler{
rt: rt,
requests: map[string]io.ReadCloser{},
}
}
func (h *reqBodyHandler) newRequest(rc io.ReadCloser) (string, func()) {
id := identity.NewID()
h.mu.Lock()
h.requests[id] = rc
h.mu.Unlock()
return "http://" + urlPrefix + id, func() {
h.mu.Lock()
delete(h.requests, id)
h.mu.Unlock()
rc.Close()
}
}
func (h *reqBodyHandler) RoundTrip(req *http.Request) (*http.Response, error) {
host := req.URL.Host
if strings.HasPrefix(host, urlPrefix) {
if req.Method != http.MethodGet {
return nil, errors.Errorf("invalid request")
}
id := strings.TrimPrefix(host, urlPrefix)
h.mu.Lock()
rc, ok := h.requests[id]
delete(h.requests, id)
h.mu.Unlock()
if !ok {
return nil, errors.Errorf("context not found")
}
resp := &http.Response{
Status: "200 OK",
StatusCode: http.StatusOK,
Body: rc,
ContentLength: -1,
}
return resp, nil
}
return h.rt.RoundTrip(req)
}
|
