8000 added a response_reader that tracks response body size by shmul · Pull Request #4 · miolini/datacounter · GitHub
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added a response_reader that tracks response body size #4

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added a response_reader that tracks response body size #4

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bd2f4e6
added a response_reader that tracks response body size
Nov 20, 2019
aee1175
cosmetics to satisfy build checks
Nov 21, 2019
0a5a889
changed mod file
Nov 21, 2019
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2 changes: 1 addition & 1 deletion go.mod
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Original file line number Diff line number Diff line change
@@ -1,3 +1,3 @@
module github.com/miolini/datacounter
module github.com/shmul/datacounter

go 1.11
36 changes: 36 additions & 0 deletions response_reader.go
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Original file line number Diff line number Diff line change
@@ -0,0 +1,36 @@
package datacounter

import (
"io"
"sync/atomic"
)

// ResponseBodyCounter is counter for ReadCloser primarily targeted at wrapping http.Request Body
type ResponseBodyCounter struct {
io.ReadCloser
count uint64
}

// NewResponseBodyCounter function for create new ResponseBodyCounter
func NewResponseBodyCounter(r io.ReadCloser) *ResponseBodyCounter {
return &ResponseBodyCounter{
ReadCloser: r,
}
}

// Read invokes the underlying Reader
func (counter *ResponseBodyCounter) Read(buf []byte) (int, error) {
n, err := counter.ReadCloser.Read(buf)
atomic.AddUint64(&counter.count, uint64(n))
return n, err
}

// Close invokes the underlying Closer
func (counter *ResponseBodyCounter) Close() error {
return counter.ReadCloser.Close()
}

// Count function return counted bytes
func (counter *ResponseBodyCounter) Count() uint64 {
return atomic.LoadUint64(&counter.count)
}
0