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102 lines
2.7 KiB
102 lines
2.7 KiB
package s3api
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import (
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"bytes"
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"encoding/base64"
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"encoding/xml"
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"fmt"
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"github.com/chrislusf/seaweedfs/weed/glog"
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"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
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"github.com/chrislusf/seaweedfs/weed/util"
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"net/http"
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"net/url"
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"time"
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)
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type mimeType string
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const (
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mimeNone mimeType = ""
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mimeJSON mimeType = "application/json"
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mimeXML mimeType = "application/xml"
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)
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func setCommonHeaders(w http.ResponseWriter) {
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w.Header().Set("x-amz-request-id", fmt.Sprintf("%d", time.Now().UnixNano()))
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w.Header().Set("Accept-Ranges", "bytes")
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}
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// Encodes the response headers into XML format.
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func encodeResponse(response interface{}) []byte {
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var bytesBuffer bytes.Buffer
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bytesBuffer.WriteString(xml.Header)
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e := xml.NewEncoder(&bytesBuffer)
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e.Encode(response)
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return bytesBuffer.Bytes()
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}
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func (s3a *S3ApiServer) withFilerClient(fn func(filer_pb.SeaweedFilerClient) error) error {
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grpcConnection, err := util.GrpcDial(s3a.option.FilerGrpcAddress)
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if err != nil {
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return fmt.Errorf("fail to dial %s: %v", s3a.option.FilerGrpcAddress, err)
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}
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defer grpcConnection.Close()
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client := filer_pb.NewSeaweedFilerClient(grpcConnection)
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return fn(client)
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}
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// If none of the http routes match respond with MethodNotAllowed
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func notFoundHandler(w http.ResponseWriter, r *http.Request) {
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glog.V(0).Infof("unsupported %s %s", r.Method, r.RequestURI)
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writeErrorResponse(w, ErrMethodNotAllowed, r.URL)
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}
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func writeErrorResponse(w http.ResponseWriter, errorCode ErrorCode, reqURL *url.URL) {
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apiError := getAPIError(errorCode)
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errorResponse := getRESTErrorResponse(apiError, reqURL.Path)
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encodedErrorResponse := encodeResponse(errorResponse)
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writeResponse(w, apiError.HTTPStatusCode, encodedErrorResponse, mimeXML)
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}
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func getRESTErrorResponse(err APIError, resource string) RESTErrorResponse {
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return RESTErrorResponse{
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Code: err.Code,
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Message: err.Description,
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Resource: resource,
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RequestID: fmt.Sprintf("%d", time.Now().UnixNano()),
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}
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}
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func writeResponse(w http.ResponseWriter, statusCode int, response []byte, mType mimeType) {
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setCommonHeaders(w)
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if mType != mimeNone {
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w.Header().Set("Content-Type", string(mType))
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}
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w.WriteHeader(statusCode)
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if response != nil {
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w.Write(response)
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w.(http.Flusher).Flush()
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}
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}
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func writeSuccessResponseXML(w http.ResponseWriter, response []byte) {
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writeResponse(w, http.StatusOK, response, mimeXML)
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}
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func writeSuccessResponseEmpty(w http.ResponseWriter) {
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writeResponse(w, http.StatusOK, nil, mimeNone)
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}
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func validateContentMd5(h http.Header) ([]byte, error) {
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md5B64, ok := h["Content-Md5"]
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if ok {
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if md5B64[0] == "" {
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return nil, fmt.Errorf("Content-Md5 header set to empty value")
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}
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return base64.StdEncoding.DecodeString(md5B64[0])
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}
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return []byte{}, nil
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}
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