retriablerequest.go

Documentation: github.com/Azure/go-autorest/autorest

     1  package autorest
     2  
     3  // Copyright 2017 Microsoft Corporation
     4  //
     5  //  Licensed under the Apache License, Version 2.0 (the "License");
     6  //  you may not use this file except in compliance with the License.
     7  //  You may obtain a copy of the License at
     8  //
     9  //      http://www.apache.org/licenses/LICENSE-2.0
    10  //
    11  //  Unless required by applicable law or agreed to in writing, software
    12  //  distributed under the License is distributed on an "AS IS" BASIS,
    13  //  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    14  //  See the License for the specific language governing permissions and
    15  //  limitations under the License.
    16  
    17  import (
    18  	"bytes"
    19  	"io"
    20  	"io/ioutil"
    21  	"net/http"
    22  )
    23  
    24  // NewRetriableRequest returns a wrapper around an HTTP request that support retry logic.
    25  func NewRetriableRequest(req *http.Request) *RetriableRequest {
    26  	return &RetriableRequest{req: req}
    27  }
    28  
    29  // Request returns the wrapped HTTP request.
    30  func (rr *RetriableRequest) Request() *http.Request {
    31  	return rr.req
    32  }
    33  
    34  func (rr *RetriableRequest) prepareFromByteReader() (err error) {
    35  	// fall back to making a copy (only do this once)
    36  	b := []byte{}
    37  	if rr.req.ContentLength > 0 {
    38  		b = make([]byte, rr.req.ContentLength)
    39  		_, err = io.ReadFull(rr.req.Body, b)
    40  		if err != nil {
    41  			return err
    42  		}
    43  	} else {
    44  		b, err = ioutil.ReadAll(rr.req.Body)
    45  		if err != nil {
    46  			return err
    47  		}
    48  	}
    49  	rr.br = bytes.NewReader(b)
    50  	rr.req.Body = ioutil.NopCloser(rr.br)
    51  	return err
    52  }
    53
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