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109 lines
3.1 KiB
109 lines
3.1 KiB
package s3err
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import (
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"bytes"
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"encoding/xml"
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"fmt"
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"github.com/aws/aws-sdk-go/private/protocol/xml/xmlutil"
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"github.com/gorilla/mux"
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"github.com/seaweedfs/seaweedfs/weed/glog"
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"net/http"
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"strconv"
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"strings"
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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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MimeXML mimeType = "application/xml"
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)
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func WriteAwsXMLResponse(w http.ResponseWriter, r *http.Request, statusCode int, result interface{}) {
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var bytesBuffer bytes.Buffer
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err := xmlutil.BuildXML(result, xml.NewEncoder(&bytesBuffer))
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if err != nil {
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WriteErrorResponse(w, r, ErrInternalError)
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return
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}
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WriteResponse(w, r, statusCode, bytesBuffer.Bytes(), MimeXML)
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}
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func WriteXMLResponse(w http.ResponseWriter, r *http.Request, statusCode int, response interface{}) {
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WriteResponse(w, r, statusCode, EncodeXMLResponse(response), MimeXML)
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}
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func WriteEmptyResponse(w http.ResponseWriter, r *http.Request, statusCode int) {
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WriteResponse(w, r, statusCode, []byte{}, mimeNone)
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PostLog(r, statusCode, ErrNone)
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}
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func WriteErrorResponse(w http.ResponseWriter, r *http.Request, errorCode ErrorCode) {
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vars := mux.Vars(r)
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bucket := vars["bucket"]
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object := vars["object"]
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if strings.HasPrefix(object, "/") {
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object = object[1:]
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}
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apiError := GetAPIError(errorCode)
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errorResponse := getRESTErrorResponse(apiError, r.URL.Path, bucket, object)
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WriteXMLResponse(w, r, apiError.HTTPStatusCode, errorResponse)
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PostLog(r, apiError.HTTPStatusCode, errorCode)
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}
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func getRESTErrorResponse(err APIError, resource string, bucket, object string) RESTErrorResponse {
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return RESTErrorResponse{
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Code: err.Code,
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BucketName: bucket,
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Key: object,
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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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// Encodes the response headers into XML format.
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func EncodeXMLResponse(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 setCommonHeaders(w http.ResponseWriter, r *http.Request) {
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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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if r.Header.Get("Origin") != "" {
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w.Header().Set("Access-Control-Allow-Origin", "*")
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w.Header().Set("Access-Control-Expose-Headers", "*")
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w.Header().Set("Access-Control-Allow-Credentials", "true")
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}
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}
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func WriteResponse(w http.ResponseWriter, r *http.Request, statusCode int, response []byte, mType mimeType) {
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setCommonHeaders(w, r)
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if response != nil {
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w.Header().Set("Content-Length", strconv.Itoa(len(response)))
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}
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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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glog.V(4).Infof("status %d %s: %s", statusCode, mType, string(response))
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_, err := w.Write(response)
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if err != nil {
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glog.V(0).Infof("write err: %v", err)
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}
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w.(http.Flusher).Flush()
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}
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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, r, ErrMethodNotAllowed)
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}
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