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author | Harshavardhana <harsha@minio.io> | 2016-10-26 05:21:07 -0700 |
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committer | Christopher Speller <crspeller@gmail.com> | 2016-10-26 08:21:07 -0400 |
commit | f02620b291b988848392c455a7719699f6b5c00f (patch) | |
tree | 695e07607e86b000b9fe78e77df7f33673f1a755 /vendor/github.com/minio/minio-go/hook-reader.go | |
parent | b354d25d3731b53613489d95cfa4c946cf8e0888 (diff) | |
download | chat-f02620b291b988848392c455a7719699f6b5c00f.tar.gz chat-f02620b291b988848392c455a7719699f6b5c00f.tar.bz2 chat-f02620b291b988848392c455a7719699f6b5c00f.zip |
Moving away from goamz to use minio-go instead. (#4193)
minio-go does fully managed way of handling S3 API requests
- Automatic bucket location management across all s3 regions.
- Transparently upload large files in multipart if file 64MB
or larger.
- Right GetObject() API provides compatibility with
io.ReadWriteSeeker interface.
- Various other APIs including bulk deletes, server side object
copy, bucket policies and bucket notifications.
Fixes #4182
Diffstat (limited to 'vendor/github.com/minio/minio-go/hook-reader.go')
-rw-r--r-- | vendor/github.com/minio/minio-go/hook-reader.go | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/vendor/github.com/minio/minio-go/hook-reader.go b/vendor/github.com/minio/minio-go/hook-reader.go new file mode 100644 index 000000000..bc9ece049 --- /dev/null +++ b/vendor/github.com/minio/minio-go/hook-reader.go @@ -0,0 +1,70 @@ +/* + * Minio Go Library for Amazon S3 Compatible Cloud Storage (C) 2015, 2016 Minio, Inc. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package minio + +import "io" + +// hookReader hooks additional reader in the source stream. It is +// useful for making progress bars. Second reader is appropriately +// notified about the exact number of bytes read from the primary +// source on each Read operation. +type hookReader struct { + source io.Reader + hook io.Reader +} + +// Seek implements io.Seeker. Seeks source first, and if necessary +// seeks hook if Seek method is appropriately found. +func (hr *hookReader) Seek(offset int64, whence int) (n int64, err error) { + // Verify for source has embedded Seeker, use it. + sourceSeeker, ok := hr.source.(io.Seeker) + if ok { + return sourceSeeker.Seek(offset, whence) + } + // Verify if hook has embedded Seeker, use it. + hookSeeker, ok := hr.hook.(io.Seeker) + if ok { + return hookSeeker.Seek(offset, whence) + } + return n, nil +} + +// Read implements io.Reader. Always reads from the source, the return +// value 'n' number of bytes are reported through the hook. Returns +// error for all non io.EOF conditions. +func (hr *hookReader) Read(b []byte) (n int, err error) { + n, err = hr.source.Read(b) + if err != nil && err != io.EOF { + return n, err + } + // Progress the hook with the total read bytes from the source. + if _, herr := hr.hook.Read(b[:n]); herr != nil { + if herr != io.EOF { + return n, herr + } + } + return n, err +} + +// newHook returns a io.ReadSeeker which implements hookReader that +// reports the data read from the source to the hook. +func newHook(source, hook io.Reader) io.Reader { + if hook == nil { + return source + } + return &hookReader{source, hook} +} |