README
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DoppelgangerReader 
DoppelgangerReader provides a way to read one io.Reader multiple times.
package main
import (
"fmt"
"bytes"
"io/ioutil"
"github.com/Eun/go-doppelgangerreader"
)
func main() {
reader := bytes.NewBufferString("Hello World")
factory := doppelgangerreader.NewFactory(reader)
defer factory.Close()
d1 := factory.NewDoppelganger()
defer d1.Close()
fmt.Println(ioutil.ReadAll(d1))
d2 := factory.NewDoppelganger()
defer d2.Close()
fmt.Println(ioutil.ReadAll(d2))
}
Documentation
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Index ¶
Examples ¶
Constants ¶
This section is empty.
Variables ¶
This section is empty.
Functions ¶
func HTTPMiddleware ¶
HTTPMiddleware adds a doppelganger factory for the body to the request. At the same time it replaces the original body with a doppelganger reader. You can specify a size limit for the reader (0 disables the limit) The factory can be fetched by using HTTPBodyFactory()
func IsNilReaderError ¶
IsNilReaderError returns true if the specified error is a NilReaderError
Types ¶
type DoppelgangerFactory ¶
type DoppelgangerFactory interface {
NewDoppelganger() io.ReadCloser
RemoveDoppelganger(r io.ReadCloser) error
Close() error
}
DoppelgangerFactory is a reader that mimics the behaviour of an other reader it can be used to read readers multiple times
Example (HttpErrorHandler) ¶
handler := http.NewServeMux()
handler.HandleFunc("/", func(w http.ResponseWriter, request *http.Request) {
_, _ = ioutil.ReadAll(request.Body)
panic("some random error")
})
http.ListenAndServe(":8000", errorHandler{handler})
Output:
func GetFactory ¶
func GetFactory(reader io.Reader) DoppelgangerFactory
GetFactory returns the DoppelgangerFactory if the reader is a Doppelganger
func HTTPBodyFactory ¶
func HTTPBodyFactory(r *http.Request) DoppelgangerFactory
HTTPBodyFactory returns a http body factory for a request. Notice that you have to use the HTTPMiddleware function.
func NewFactory ¶
func NewFactory(readerToMimic io.Reader) DoppelgangerFactory
NewFactory creates a new DoppelgangerFactory with the original reader specified if the reader is already a Doppelganger it will return the original factory
type NilReaderError ¶
type NilReaderError struct{}
NilReaderError will be reported if the provided reader is nil
Source Files