mirror of https://github.com/minio/minio.git
126 lines
4.1 KiB
Go
126 lines
4.1 KiB
Go
/*
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* Minio Cloud Storage, (C) 2015, 2016 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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"io"
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"io/ioutil"
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"mime/multipart"
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"net/http"
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"strings"
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)
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// Validates location constraint in PutBucket request body.
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// The location value in the request body should match the
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// region configured at serverConfig, otherwise error is returned.
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func isValidLocationConstraint(r *http.Request) (s3Error APIErrorCode) {
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serverRegion := serverConfig.GetRegion()
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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 || err == io.EOF {
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// Successfully decoded, proceed to verify the region.
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// Once region has been obtained we proceed to verify it.
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incomingRegion := locationConstraint.Location
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if incomingRegion == "" {
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// Location constraint is empty for region "us-east-1",
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// in accordance with protocol.
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incomingRegion = "us-east-1"
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}
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// Return errInvalidRegion if location constraint does not match
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// with configured region.
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s3Error = ErrNone
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if serverRegion != incomingRegion {
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s3Error = ErrInvalidRegion
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}
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return s3Error
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}
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errorIf(err, "Unable to xml decode location constraint")
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// Treat all other failures as XML parsing errors.
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return ErrMalformedXML
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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-encoding",
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"content-disposition",
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// Add more supported headers here.
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}
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// extractMetadataFromHeader extracts metadata from HTTP header.
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func extractMetadataFromHeader(header http.Header) map[string]string {
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metadata := make(map[string]string)
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// Save standard supported headers.
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for _, supportedHeader := range supportedHeaders {
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canonicalHeader := http.CanonicalHeaderKey(supportedHeader)
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// HTTP headers are case insensitive, look for both canonical
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// and non canonical entries.
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if _, ok := header[canonicalHeader]; ok {
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metadata[supportedHeader] = header.Get(canonicalHeader)
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} else if _, ok := header[supportedHeader]; ok {
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metadata[supportedHeader] = header.Get(supportedHeader)
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}
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}
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// Go through all other headers for any additional headers that needs to be saved.
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for key := range header {
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cKey := http.CanonicalHeaderKey(key)
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if strings.HasPrefix(cKey, "X-Amz-Meta-") {
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metadata[cKey] = header.Get(cKey)
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} else if strings.HasPrefix(key, "X-Minio-Meta-") {
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metadata[cKey] = header.Get(cKey)
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}
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}
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// Return.
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return metadata
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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(reader *multipart.Reader) (filePart io.Reader, fileName string, formValues map[string]string, err error) {
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/// HTML Form values
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formValues = make(map[string]string)
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fileName = ""
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for err == nil {
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var part *multipart.Part
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part, err = reader.NextPart()
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if part != nil {
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canonicalFormName := http.CanonicalHeaderKey(part.FormName())
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if canonicalFormName != "File" {
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var buffer []byte
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limitReader := io.LimitReader(part, maxFormFieldSize+1)
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buffer, err = ioutil.ReadAll(limitReader)
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if err != nil {
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return nil, "", nil, err
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}
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if int64(len(buffer)) > maxFormFieldSize {
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return nil, "", nil, errSizeUnexpected
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}
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formValues[canonicalFormName] = string(buffer)
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} else {
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filePart = part
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fileName = part.FileName()
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// As described in S3 spec, we expect file to be the last form field
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break
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}
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}
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}
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return filePart, fileName, formValues, nil
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}
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