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