github.com/gophercloud/gophercloud@v1.11.0/pagination/http.go (about)

     1  package pagination
     2  
     3  import (
     4  	"encoding/json"
     5  	"io/ioutil"
     6  	"net/http"
     7  	"net/url"
     8  	"strings"
     9  
    10  	"github.com/gophercloud/gophercloud"
    11  )
    12  
    13  // PageResult stores the HTTP response that returned the current page of results.
    14  type PageResult struct {
    15  	gophercloud.Result
    16  	url.URL
    17  }
    18  
    19  // PageResultFrom parses an HTTP response as JSON and returns a PageResult containing the
    20  // results, interpreting it as JSON if the content type indicates.
    21  func PageResultFrom(resp *http.Response) (PageResult, error) {
    22  	var parsedBody interface{}
    23  
    24  	defer resp.Body.Close()
    25  	rawBody, err := ioutil.ReadAll(resp.Body)
    26  	if err != nil {
    27  		return PageResult{}, err
    28  	}
    29  
    30  	if strings.HasPrefix(resp.Header.Get("Content-Type"), "application/json") {
    31  		err = json.Unmarshal(rawBody, &parsedBody)
    32  		if err != nil {
    33  			return PageResult{}, err
    34  		}
    35  	} else {
    36  		parsedBody = rawBody
    37  	}
    38  
    39  	return PageResultFromParsed(resp, parsedBody), err
    40  }
    41  
    42  // PageResultFromParsed constructs a PageResult from an HTTP response that has already had its
    43  // body parsed as JSON (and closed).
    44  func PageResultFromParsed(resp *http.Response, body interface{}) PageResult {
    45  	return PageResult{
    46  		Result: gophercloud.Result{
    47  			Body:       body,
    48  			StatusCode: resp.StatusCode,
    49  			Header:     resp.Header,
    50  		},
    51  		URL: *resp.Request.URL,
    52  	}
    53  }
    54  
    55  // Request performs an HTTP request and extracts the http.Response from the result.
    56  func Request(client *gophercloud.ServiceClient, headers map[string]string, url string) (*http.Response, error) {
    57  	return client.Get(url, nil, &gophercloud.RequestOpts{
    58  		MoreHeaders:      headers,
    59  		OkCodes:          []int{200, 204, 300},
    60  		KeepResponseBody: true,
    61  	})
    62  }