forked from TrueCloudLab/frostfs-s3-gw
Initial commit based on https://github.com/minio/minio/releases/tag/RELEASE.2020-07-02T00-15-09Z
This commit is contained in:
Evgeniy Kulikov
commit
9bf57615b0
1206 changed files with 281445 additions and 0 deletions
454
cmd/handler-utils.go
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454
cmd/handler-utils.go
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/*
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* MinIO Cloud Storage, (C) 2015, 2016, 2017 MinIO, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package cmd
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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"
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"io/ioutil"
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"mime/multipart"
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"net"
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"net/http"
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"net/url"
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"regexp"
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"strings"
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"time"
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xhttp "github.com/minio/minio/cmd/http"
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"github.com/minio/minio/cmd/logger"
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"github.com/minio/minio/pkg/auth"
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"github.com/minio/minio/pkg/handlers"
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"github.com/minio/minio/pkg/madmin"
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)
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const (
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copyDirective = "COPY"
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replaceDirective = "REPLACE"
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)
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// Parses location constraint from the incoming reader.
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func parseLocationConstraint(r *http.Request) (location string, s3Error APIErrorCode) {
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// If the request has no body with content-length set to 0,
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// we do not have to validate location constraint. Bucket will
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// be created at default region.
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locationConstraint := createBucketLocationConfiguration{}
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err := xmlDecoder(r.Body, &locationConstraint, r.ContentLength)
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if err != nil && r.ContentLength != 0 {
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logger.LogIf(GlobalContext, err)
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// Treat all other failures as XML parsing errors.
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return "", ErrMalformedXML
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} // else for both err as nil or io.EOF
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location = locationConstraint.Location
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if location == "" {
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location = globalServerRegion
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}
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return location, ErrNone
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}
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// Validates input location is same as configured region
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// of MinIO server.
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func isValidLocation(location string) bool {
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return globalServerRegion == "" || globalServerRegion == location
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}
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// Supported headers that needs to be extracted.
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var supportedHeaders = []string{
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"content-type",
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"cache-control",
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"content-language",
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"content-encoding",
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"content-disposition",
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xhttp.AmzStorageClass,
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xhttp.AmzObjectTagging,
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"expires",
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// Add more supported headers here.
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}
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// isDirectiveValid - check if tagging-directive is valid.
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func isDirectiveValid(v string) bool {
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// Check if set metadata-directive is valid.
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return isDirectiveCopy(v) || isDirectiveReplace(v)
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}
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// Check if the directive COPY is requested.
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func isDirectiveCopy(value string) bool {
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// By default if directive is not set we
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// treat it as 'COPY' this function returns true.
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return value == copyDirective || value == ""
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}
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// Check if the directive REPLACE is requested.
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func isDirectiveReplace(value string) bool {
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return value == replaceDirective
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}
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// userMetadataKeyPrefixes contains the prefixes of used-defined metadata keys.
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// All values stored with a key starting with one of the following prefixes
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// must be extracted from the header.
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var userMetadataKeyPrefixes = []string{
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"X-Amz-Meta-",
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"X-Minio-Meta-",
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"x-amz-meta-",
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"x-minio-meta-",
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}
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// extractMetadata extracts metadata from HTTP header and HTTP queryString.
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func extractMetadata(ctx context.Context, r *http.Request) (metadata map[string]string, err error) {
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query := r.URL.Query()
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header := r.Header
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metadata = make(map[string]string)
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// Extract all query values.
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err = extractMetadataFromMap(ctx, query, metadata)
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if err != nil {
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return nil, err
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}
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// Extract all header values.
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err = extractMetadataFromMap(ctx, header, metadata)
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if err != nil {
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return nil, err
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}
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// Set content-type to default value if it is not set.
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if _, ok := metadata["content-type"]; !ok {
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metadata["content-type"] = "application/octet-stream"
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}
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// Success.
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return metadata, nil
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}
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// extractMetadata extracts metadata from map values.
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func extractMetadataFromMap(ctx context.Context, v map[string][]string, m map[string]string) error {
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if v == nil {
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logger.LogIf(ctx, errInvalidArgument)
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return errInvalidArgument
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}
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// Save all supported headers.
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for _, supportedHeader := range supportedHeaders {
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if value, ok := v[http.CanonicalHeaderKey(supportedHeader)]; ok {
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m[supportedHeader] = value[0]
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} else if value, ok := v[supportedHeader]; ok {
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m[supportedHeader] = value[0]
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}
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}
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for key := range v {
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for _, prefix := range userMetadataKeyPrefixes {
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if !strings.HasPrefix(strings.ToLower(key), strings.ToLower(prefix)) {
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continue
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}
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value, ok := v[key]
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if ok {
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m[key] = strings.Join(value, ",")
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break
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}
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}
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}
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return nil
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}
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// The Query string for the redirect URL the client is
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// redirected on successful upload.
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func getRedirectPostRawQuery(objInfo ObjectInfo) string {
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redirectValues := make(url.Values)
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redirectValues.Set("bucket", objInfo.Bucket)
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redirectValues.Set("key", objInfo.Name)
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redirectValues.Set("etag", "\""+objInfo.ETag+"\"")
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return redirectValues.Encode()
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}
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// Returns access credentials in the request Authorization header.
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func getReqAccessCred(r *http.Request, region string) (cred auth.Credentials) {
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cred, _, _ = getReqAccessKeyV4(r, region, serviceS3)
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if cred.AccessKey == "" {
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cred, _, _ = getReqAccessKeyV2(r)
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}
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if cred.AccessKey == "" {
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claims, owner, _ := webRequestAuthenticate(r)
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if owner {
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return globalActiveCred
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}
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if claims != nil {
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cred, _ = globalIAMSys.GetUser(claims.AccessKey)
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}
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}
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return cred
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}
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// Extract request params to be sent with event notifiation.
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func extractReqParams(r *http.Request) map[string]string {
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if r == nil {
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return nil
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}
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region := globalServerRegion
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cred := getReqAccessCred(r, region)
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// Success.
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return map[string]string{
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"region": region,
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"accessKey": cred.AccessKey,
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"sourceIPAddress": handlers.GetSourceIP(r),
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// Add more fields here.
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}
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}
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// Extract response elements to be sent with event notifiation.
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func extractRespElements(w http.ResponseWriter) map[string]string {
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return map[string]string{
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"requestId": w.Header().Get(xhttp.AmzRequestID),
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"content-length": w.Header().Get(xhttp.ContentLength),
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// Add more fields here.
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}
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}
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// Trims away `aws-chunked` from the content-encoding header if present.
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// Streaming signature clients can have custom content-encoding such as
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// `aws-chunked,gzip` here we need to only save `gzip`.
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// For more refer http://docs.aws.amazon.com/AmazonS3/latest/API/sigv4-streaming.html
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func trimAwsChunkedContentEncoding(contentEnc string) (trimmedContentEnc string) {
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if contentEnc == "" {
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return contentEnc
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}
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var newEncs []string
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for _, enc := range strings.Split(contentEnc, ",") {
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if enc != streamingContentEncoding {
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newEncs = append(newEncs, enc)
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}
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}
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return strings.Join(newEncs, ",")
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}
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// Validate form field size for s3 specification requirement.
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func validateFormFieldSize(ctx context.Context, formValues http.Header) error {
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// Iterate over form values
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for k := range formValues {
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// Check if value's field exceeds S3 limit
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if int64(len(formValues.Get(k))) > maxFormFieldSize {
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logger.LogIf(ctx, errSizeUnexpected)
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return errSizeUnexpected
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}
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}
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// Success.
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return nil
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}
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// Extract form fields and file data from a HTTP POST Policy
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func extractPostPolicyFormValues(ctx context.Context, form *multipart.Form) (filePart io.ReadCloser, fileName string, fileSize int64, formValues http.Header, err error) {
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/// HTML Form values
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fileName = ""
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// Canonicalize the form values into http.Header.
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formValues = make(http.Header)
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for k, v := range form.Value {
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formValues[http.CanonicalHeaderKey(k)] = v
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}
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// Validate form values.
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if err = validateFormFieldSize(ctx, formValues); err != nil {
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return nil, "", 0, nil, err
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}
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// this means that filename="" was not specified for file key and Go has
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// an ugly way of handling this situation. Refer here
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// https://golang.org/src/mime/multipart/formdata.go#L61
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if len(form.File) == 0 {
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var b = &bytes.Buffer{}
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for _, v := range formValues["File"] {
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b.WriteString(v)
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}
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fileSize = int64(b.Len())
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filePart = ioutil.NopCloser(b)
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return filePart, fileName, fileSize, formValues, nil
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}
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// Iterator until we find a valid File field and break
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for k, v := range form.File {
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canonicalFormName := http.CanonicalHeaderKey(k)
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if canonicalFormName == "File" {
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if len(v) == 0 {
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logger.LogIf(ctx, errInvalidArgument)
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return nil, "", 0, nil, errInvalidArgument
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}
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// Fetch fileHeader which has the uploaded file information
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fileHeader := v[0]
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// Set filename
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fileName = fileHeader.Filename
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// Open the uploaded part
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filePart, err = fileHeader.Open()
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if err != nil {
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logger.LogIf(ctx, err)
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return nil, "", 0, nil, err
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}
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// Compute file size
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fileSize, err = filePart.(io.Seeker).Seek(0, 2)
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if err != nil {
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logger.LogIf(ctx, err)
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return nil, "", 0, nil, err
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}
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// Reset Seek to the beginning
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_, err = filePart.(io.Seeker).Seek(0, 0)
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if err != nil {
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logger.LogIf(ctx, err)
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return nil, "", 0, nil, err
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}
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// File found and ready for reading
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break
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}
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}
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return filePart, fileName, fileSize, formValues, nil
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}
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// Log headers and body.
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func httpTraceAll(f http.HandlerFunc) http.HandlerFunc {
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return func(w http.ResponseWriter, r *http.Request) {
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if !globalHTTPTrace.HasSubscribers() {
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f.ServeHTTP(w, r)
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return
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}
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trace := Trace(f, true, w, r)
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globalHTTPTrace.Publish(trace)
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}
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}
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// Log only the headers.
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func httpTraceHdrs(f http.HandlerFunc) http.HandlerFunc {
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return func(w http.ResponseWriter, r *http.Request) {
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if !globalHTTPTrace.HasSubscribers() {
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f.ServeHTTP(w, r)
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return
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}
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trace := Trace(f, false, w, r)
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globalHTTPTrace.Publish(trace)
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}
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}
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func collectAPIStats(api string, f http.HandlerFunc) http.HandlerFunc {
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return func(w http.ResponseWriter, r *http.Request) {
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globalHTTPStats.currentS3Requests.Inc(api)
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defer globalHTTPStats.currentS3Requests.Dec(api)
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statsWriter := logger.NewResponseWriter(w)
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f.ServeHTTP(statsWriter, r)
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// Time duration in secs since the call started.
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// We don't need to do nanosecond precision in this
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// simply for the fact that it is not human readable.
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durationSecs := time.Since(statsWriter.StartTime).Seconds()
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globalHTTPStats.updateStats(api, r, statsWriter, durationSecs)
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}
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}
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// Returns "/bucketName/objectName" for path-style or virtual-host-style requests.
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func getResource(path string, host string, domains []string) (string, error) {
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if len(domains) == 0 {
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return path, nil
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}
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// If virtual-host-style is enabled construct the "resource" properly.
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if strings.Contains(host, ":") {
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// In bucket.mydomain.com:9000, strip out :9000
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var err error
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if host, _, err = net.SplitHostPort(host); err != nil {
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reqInfo := (&logger.ReqInfo{}).AppendTags("host", host)
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reqInfo.AppendTags("path", path)
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ctx := logger.SetReqInfo(GlobalContext, reqInfo)
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logger.LogIf(ctx, err)
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return "", err
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}
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}
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for _, domain := range domains {
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if !strings.HasSuffix(host, "."+domain) {
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continue
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}
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bucket := strings.TrimSuffix(host, "."+domain)
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return SlashSeparator + pathJoin(bucket, path), nil
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}
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return path, nil
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}
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var regexVersion = regexp.MustCompile(`(\w\d+)`)
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func extractAPIVersion(r *http.Request) string {
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return regexVersion.FindString(r.URL.Path)
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}
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// If none of the http routes match respond with appropriate errors
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func errorResponseHandler(w http.ResponseWriter, r *http.Request) {
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version := extractAPIVersion(r)
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switch {
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case strings.HasPrefix(r.URL.Path, peerRESTPrefix):
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desc := fmt.Sprintf("Expected 'peer' API version '%s', instead found '%s', please upgrade the servers",
|
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peerRESTVersion, version)
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writeErrorResponseString(r.Context(), w, APIError{
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Code: "XMinioPeerVersionMismatch",
|
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Description: desc,
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HTTPStatusCode: http.StatusUpgradeRequired,
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}, r.URL)
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case strings.HasPrefix(r.URL.Path, storageRESTPrefix):
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desc := fmt.Sprintf("Expected 'storage' API version '%s', instead found '%s', please upgrade the servers",
|
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storageRESTVersion, version)
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writeErrorResponseString(r.Context(), w, APIError{
|
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Code: "XMinioStorageVersionMismatch",
|
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Description: desc,
|
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HTTPStatusCode: http.StatusUpgradeRequired,
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||||
}, r.URL)
|
||||
case strings.HasPrefix(r.URL.Path, lockRESTPrefix):
|
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desc := fmt.Sprintf("Expected 'lock' API version '%s', instead found '%s', please upgrade the servers",
|
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lockRESTVersion, version)
|
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writeErrorResponseString(r.Context(), w, APIError{
|
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Code: "XMinioLockVersionMismatch",
|
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Description: desc,
|
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HTTPStatusCode: http.StatusUpgradeRequired,
|
||||
}, r.URL)
|
||||
case strings.HasPrefix(r.URL.Path, adminPathPrefix):
|
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var desc string
|
||||
if version == "v1" {
|
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desc = fmt.Sprintf("Server expects client requests with 'admin' API version '%s', found '%s', please upgrade the client to latest releases", madmin.AdminAPIVersion, version)
|
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} else if version == madmin.AdminAPIVersion {
|
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desc = fmt.Sprintf("This 'admin' API is not supported by server in '%s'", getMinioMode())
|
||||
} else {
|
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desc = fmt.Sprintf("Unexpected client 'admin' API version found '%s', expected '%s', please downgrade the client to older releases", version, madmin.AdminAPIVersion)
|
||||
}
|
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writeErrorResponseJSON(r.Context(), w, APIError{
|
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Code: "XMinioAdminVersionMismatch",
|
||||
Description: desc,
|
||||
HTTPStatusCode: http.StatusUpgradeRequired,
|
||||
}, r.URL)
|
||||
default:
|
||||
desc := fmt.Sprintf("Unknown API request at %s", r.URL.Path)
|
||||
writeErrorResponse(r.Context(), w, APIError{
|
||||
Code: "XMinioUnknownAPIRequest",
|
||||
Description: desc,
|
||||
HTTPStatusCode: http.StatusBadRequest,
|
||||
}, r.URL, guessIsBrowserReq(r))
|
||||
}
|
||||
}
|
||||
|
||||
// gets host name for current node
|
||||
func getHostName(r *http.Request) (hostName string) {
|
||||
if globalIsDistXL {
|
||||
hostName = GetLocalPeer(globalEndpoints)
|
||||
} else {
|
||||
hostName = r.Host
|
||||
}
|
||||
return
|
||||
}
|
||||
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