mirror of
https://github.com/minio/minio.git
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447 lines
14 KiB
Go
447 lines
14 KiB
Go
// Copyright (c) 2015-2021 MinIO, Inc.
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//
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// This file is part of MinIO Object Storage stack
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package cmd
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import (
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"context"
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"errors"
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"fmt"
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"net/http"
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"net/textproto"
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"regexp"
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"strings"
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"github.com/minio/madmin-go/v3"
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"github.com/minio/minio/internal/auth"
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"github.com/minio/minio/internal/handlers"
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xhttp "github.com/minio/minio/internal/http"
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"github.com/minio/minio/internal/logger"
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"github.com/minio/minio/internal/mcontext"
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xnet "github.com/minio/pkg/v2/net"
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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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accessDirective = "ACCESS"
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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.LogOnceIf(GlobalContext, err, "location-constraint-xml-parsing")
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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 = globalSite.Region
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}
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if !isValidLocation(location) {
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return location, ErrInvalidRegion
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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 globalSite.Region == "" || globalSite.Region == 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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"x-amz-storage-class",
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xhttp.AmzStorageClass,
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xhttp.AmzObjectTagging,
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"expires",
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xhttp.AmzBucketReplicationStatus,
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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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}
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// extractMetadataFromReq extracts metadata from HTTP header and HTTP queryString.
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func extractMetadataFromReq(ctx context.Context, r *http.Request) (metadata map[string]string, err error) {
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return extractMetadata(ctx, textproto.MIMEHeader(r.Form), textproto.MIMEHeader(r.Header))
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}
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func extractMetadata(ctx context.Context, mimesHeader ...textproto.MIMEHeader) (metadata map[string]string, err error) {
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metadata = make(map[string]string)
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for _, hdr := range mimesHeader {
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// Extract all query values.
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err = extractMetadataFromMime(ctx, hdr, metadata)
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if err != nil {
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return nil, err
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}
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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[strings.ToLower(xhttp.ContentType)]; !ok {
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metadata[strings.ToLower(xhttp.ContentType)] = "binary/octet-stream"
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}
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// https://github.com/google/security-research/security/advisories/GHSA-76wf-9vgp-pj7w
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for k := range metadata {
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if equals(k, xhttp.AmzMetaUnencryptedContentLength, xhttp.AmzMetaUnencryptedContentMD5) {
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delete(metadata, k)
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}
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}
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if contentEncoding, ok := metadata[strings.ToLower(xhttp.ContentEncoding)]; ok {
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contentEncoding = trimAwsChunkedContentEncoding(contentEncoding)
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if contentEncoding != "" {
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// Make sure to trim and save the content-encoding
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// parameter for a streaming signature which is set
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// to a custom value for example: "aws-chunked,gzip".
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metadata[strings.ToLower(xhttp.ContentEncoding)] = contentEncoding
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} else {
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// Trimmed content encoding is empty when the header
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// value is set to "aws-chunked" only.
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// Make sure to delete the content-encoding parameter
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// for a streaming signature which is set to value
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// for example: "aws-chunked"
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delete(metadata, strings.ToLower(xhttp.ContentEncoding))
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}
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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 extractMetadataFromMime(ctx context.Context, v textproto.MIMEHeader, 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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nv := make(textproto.MIMEHeader, len(v))
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for k, kv := range v {
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// Canonicalize all headers, to remove any duplicates.
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nv[http.CanonicalHeaderKey(k)] = kv
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}
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// Save all supported headers.
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for _, supportedHeader := range supportedHeaders {
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value, ok := nv[http.CanonicalHeaderKey(supportedHeader)]
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if ok {
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m[supportedHeader] = strings.Join(value, ",")
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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 !stringsHasPrefixFold(key, prefix) {
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continue
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}
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value, ok := nv[http.CanonicalHeaderKey(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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// 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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return cred
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}
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// Extract request params to be sent with event notification.
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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 := globalSite.Region
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cred := getReqAccessCred(r, region)
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principalID := cred.AccessKey
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if cred.ParentUser != "" {
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principalID = cred.ParentUser
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}
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// Success.
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m := map[string]string{
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"region": region,
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"principalId": principalID,
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"sourceIPAddress": handlers.GetSourceIP(r),
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// Add more fields here.
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}
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if rangeField := r.Header.Get(xhttp.Range); rangeField != "" {
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m["range"] = rangeField
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}
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if _, ok := r.Header[xhttp.MinIOSourceReplicationRequest]; ok {
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m[xhttp.MinIOSourceReplicationRequest] = ""
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}
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return m
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}
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// Extract response elements to be sent with event notification.
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func extractRespElements(w http.ResponseWriter) map[string]string {
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if w == nil {
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return map[string]string{}
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}
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return map[string]string{
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"requestId": w.Header().Get(xhttp.AmzRequestID),
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"nodeId": w.Header().Get(xhttp.AmzRequestHostID),
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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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func collectInternodeStats(f http.HandlerFunc) http.HandlerFunc {
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return func(w http.ResponseWriter, r *http.Request) {
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f.ServeHTTP(w, r)
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tc, ok := r.Context().Value(mcontext.ContextTraceKey).(*mcontext.TraceCtxt)
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if !ok || tc == nil {
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return
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}
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globalConnStats.incInternodeInputBytes(int64(tc.RequestRecorder.Size()))
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globalConnStats.incInternodeOutputBytes(int64(tc.ResponseRecorder.Size()))
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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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resource, err := getResource(r.URL.Path, r.Host, globalDomainNames)
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if err != nil {
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defer logger.AuditLog(r.Context(), w, r, mustGetClaimsFromToken(r))
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apiErr := errorCodes.ToAPIErr(ErrUnsupportedHostHeader)
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apiErr.Description = fmt.Sprintf("%s: %v", apiErr.Description, err)
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writeErrorResponse(r.Context(), w, apiErr, r.URL)
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return
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}
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bucket, _ := path2BucketObject(resource)
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meta, err := globalBucketMetadataSys.Get(bucket) // check if this bucket exists.
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countBktStat := bucket != "" && bucket != minioReservedBucket && err == nil && !meta.Created.IsZero()
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if countBktStat {
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globalBucketHTTPStats.updateHTTPStats(bucket, api, nil)
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}
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globalHTTPStats.currentS3Requests.Inc(api)
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f.ServeHTTP(w, r)
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globalHTTPStats.currentS3Requests.Dec(api)
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tc, _ := r.Context().Value(mcontext.ContextTraceKey).(*mcontext.TraceCtxt)
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if tc != nil {
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globalHTTPStats.updateStats(api, tc.ResponseRecorder)
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globalConnStats.incS3InputBytes(int64(tc.RequestRecorder.Size()))
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globalConnStats.incS3OutputBytes(int64(tc.ResponseRecorder.Size()))
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if countBktStat {
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globalBucketConnStats.incS3InputBytes(bucket, int64(tc.RequestRecorder.Size()))
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globalBucketConnStats.incS3OutputBytes(bucket, int64(tc.ResponseRecorder.Size()))
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globalBucketHTTPStats.updateHTTPStats(bucket, api, tc.ResponseRecorder)
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}
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}
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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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xhost, err := xnet.ParseHost(host)
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if err != nil {
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return "", err
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}
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for _, domain := range domains {
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if xhost.Name == minioReservedBucket+"."+domain {
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continue
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}
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if !strings.HasSuffix(xhost.Name, "."+domain) {
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continue
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}
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bucket := strings.TrimSuffix(xhost.Name, "."+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(`^/minio.*/(v\d+)/.*`)
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func extractAPIVersion(r *http.Request) string {
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if matches := regexVersion.FindStringSubmatch(r.URL.Path); len(matches) > 1 {
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return matches[1]
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}
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return "unknown"
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}
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func methodNotAllowedHandler(api string) func(w http.ResponseWriter, r *http.Request) {
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return errorResponseHandler
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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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if r.Method == http.MethodOptions {
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return
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}
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desc := "Do not upgrade one server at a time - please follow the recommended guidelines mentioned here https://github.com/minio/minio#upgrading-minio for your environment"
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switch {
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case strings.HasPrefix(r.URL.Path, peerRESTPrefix):
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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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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)
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case strings.HasPrefix(r.URL.Path, adminPathPrefix):
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var desc string
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version := extractAPIVersion(r)
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switch version {
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case "v1", madmin.AdminAPIVersionV2:
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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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case madmin.AdminAPIVersion:
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desc = fmt.Sprintf("This 'admin' API is not supported by server in '%s'", getMinioMode())
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default:
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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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}
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writeErrorResponseJSON(r.Context(), w, APIError{
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Code: "XMinioAdminVersionMismatch",
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Description: desc,
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HTTPStatusCode: http.StatusUpgradeRequired,
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}, r.URL)
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default:
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writeErrorResponse(r.Context(), w, APIError{
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Code: "BadRequest",
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Description: fmt.Sprintf("An error occurred when parsing the HTTP request %s at '%s'",
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r.Method, r.URL.Path),
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HTTPStatusCode: http.StatusBadRequest,
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}, r.URL)
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}
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}
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// gets host name for current node
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func getHostName(r *http.Request) (hostName string) {
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if globalIsDistErasure {
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hostName = globalLocalNodeName
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} else {
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hostName = r.Host
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}
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return
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}
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// Proxy any request to an endpoint.
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func proxyRequest(ctx context.Context, w http.ResponseWriter, r *http.Request, ep ProxyEndpoint) (success bool) {
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success = true
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// Make sure we remove any existing headers before
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// proxying the request to another node.
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for k := range w.Header() {
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w.Header().Del(k)
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}
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f := handlers.NewForwarder(&handlers.Forwarder{
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PassHost: true,
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RoundTripper: ep.Transport,
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ErrorHandler: func(w http.ResponseWriter, r *http.Request, err error) {
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success = false
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if err != nil && !errors.Is(err, context.Canceled) {
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logger.LogIf(GlobalContext, err)
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}
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},
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})
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r.URL.Scheme = "http"
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if globalIsTLS {
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r.URL.Scheme = "https"
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}
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r.URL.Host = ep.Host
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f.ServeHTTP(w, r)
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return
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}
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