text: package pagination
  
  import (
  	"encoding/json"
  	"io/ioutil"
  	"net/http"
  	"net/url"
  	"strings"
  
  	"github.com/gophercloud/gophercloud"
  )
  
  // PageResult stores the HTTP response that returned the current page of results.
  type PageResult struct {
  	gophercloud.Result
  	url.URL
  }
  
  // PageResultFrom parses an HTTP response as JSON and returns a PageResult containing the
  // results, interpreting it as JSON if the content type indicates.
  func PageResultFrom(resp *http.Response) (PageResult, error) {
  	var parsedBody interface{}
  
  	defer resp.Body.Close()
  	rawBody, err := ioutil.ReadAll(resp.Body)
  	if err != nil {
  		return PageResult{}, err
  	}
  
  	if strings.HasPrefix(resp.Header.Get("Content-Type"), "application/json") {
  		err = json.Unmarshal(rawBody, &parsedBody)
  		if err != nil {
  			return PageResult{}, err
  		}
  	} else {
  		parsedBody = rawBody
  	}
  
  	return PageResultFromParsed(resp, parsedBody), err
  }
  
  // PageResultFromParsed constructs a PageResult from an HTTP response that has already had its
  // body parsed as JSON (and closed).
  func PageResultFromParsed(resp *http.Response, body interface{}) PageResult {
  	return PageResult{
  		Result: gophercloud.Result{
  			Body:   body,
  			Header: resp.Header,
  		},
  		URL: *resp.Request.URL,
  	}
  }
  
  // Request performs an HTTP request and extracts the http.Response from the result.
  func Request(client *gophercloud.ServiceClient, headers map[string]string, url string) (*http.Response, error) {
  	return client.Get(url, nil, &gophercloud.RequestOpts{
  		MoreHeaders: headers,
  		OkCodes:     []int{200, 204, 300},
  	})
  }
  