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179 lines
4.3 KiB
Go
179 lines
4.3 KiB
Go
package autorest
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import (
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"bytes"
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"encoding/json"
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"encoding/xml"
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"fmt"
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"io"
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"net/url"
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"reflect"
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"sort"
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"strings"
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)
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// EncodedAs is a series of constants specifying various data encodings
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type EncodedAs string
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const (
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// EncodedAsJSON states that data is encoded as JSON
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EncodedAsJSON EncodedAs = "JSON"
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// EncodedAsXML states that data is encoded as Xml
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EncodedAsXML EncodedAs = "XML"
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)
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// Decoder defines the decoding method json.Decoder and xml.Decoder share
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type Decoder interface {
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Decode(v interface{}) error
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}
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// NewDecoder creates a new decoder appropriate to the passed encoding.
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// encodedAs specifies the type of encoding and r supplies the io.Reader containing the
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// encoded data.
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func NewDecoder(encodedAs EncodedAs, r io.Reader) Decoder {
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if encodedAs == EncodedAsJSON {
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return json.NewDecoder(r)
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} else if encodedAs == EncodedAsXML {
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return xml.NewDecoder(r)
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}
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return nil
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}
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// CopyAndDecode decodes the data from the passed io.Reader while making a copy. Having a copy
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// is especially useful if there is a chance the data will fail to decode.
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// encodedAs specifies the expected encoding, r provides the io.Reader to the data, and v
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// is the decoding destination.
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func CopyAndDecode(encodedAs EncodedAs, r io.Reader, v interface{}) (bytes.Buffer, error) {
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b := bytes.Buffer{}
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return b, NewDecoder(encodedAs, io.TeeReader(r, &b)).Decode(v)
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}
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// TeeReadCloser returns a ReadCloser that writes to w what it reads from rc.
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// It utilizes io.TeeReader to copy the data read and has the same behavior when reading.
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// Further, when it is closed, it ensures that rc is closed as well.
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func TeeReadCloser(rc io.ReadCloser, w io.Writer) io.ReadCloser {
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return &teeReadCloser{rc, io.TeeReader(rc, w)}
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}
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type teeReadCloser struct {
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rc io.ReadCloser
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r io.Reader
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}
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func (t *teeReadCloser) Read(p []byte) (int, error) {
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return t.r.Read(p)
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}
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func (t *teeReadCloser) Close() error {
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return t.rc.Close()
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}
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func containsInt(ints []int, n int) bool {
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for _, i := range ints {
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if i == n {
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return true
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}
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}
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return false
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}
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func escapeValueStrings(m map[string]string) map[string]string {
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for key, value := range m {
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m[key] = url.QueryEscape(value)
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}
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return m
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}
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func ensureValueStrings(mapOfInterface map[string]interface{}) map[string]string {
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mapOfStrings := make(map[string]string)
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for key, value := range mapOfInterface {
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mapOfStrings[key] = ensureValueString(value)
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}
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return mapOfStrings
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}
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func ensureValueString(value interface{}) string {
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if value == nil {
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return ""
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}
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switch v := value.(type) {
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case string:
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return v
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case []byte:
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return string(v)
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default:
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return fmt.Sprintf("%v", v)
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}
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}
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// MapToValues method converts map[string]interface{} to url.Values.
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func MapToValues(m map[string]interface{}) url.Values {
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v := url.Values{}
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for key, value := range m {
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x := reflect.ValueOf(value)
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if x.Kind() == reflect.Array || x.Kind() == reflect.Slice {
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for i := 0; i < x.Len(); i++ {
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v.Add(key, ensureValueString(x.Index(i)))
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}
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} else {
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v.Add(key, ensureValueString(value))
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}
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}
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return v
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}
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// String method converts interface v to string. If interface is a list, it
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// joins list elements using separator.
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func String(v interface{}, sep ...string) string {
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if len(sep) > 0 {
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return ensureValueString(strings.Join(v.([]string), sep[0]))
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}
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return ensureValueString(v)
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}
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// Encode method encodes url path and query parameters.
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func Encode(location string, v interface{}, sep ...string) string {
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s := String(v, sep...)
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switch strings.ToLower(location) {
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case "path":
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return pathEscape(s)
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case "query":
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return queryEscape(s)
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default:
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return s
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}
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}
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func pathEscape(s string) string {
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return strings.Replace(url.QueryEscape(s), "+", "%20", -1)
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}
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func queryEscape(s string) string {
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return url.QueryEscape(s)
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}
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// This method is same as Encode() method of "net/url" go package,
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// except it does not encode the query parameters because they
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// already come encoded. It formats values map in query format (bar=foo&a=b).
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func createQuery(v url.Values) string {
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var buf bytes.Buffer
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keys := make([]string, 0, len(v))
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for k := range v {
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keys = append(keys, k)
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}
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sort.Strings(keys)
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for _, k := range keys {
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vs := v[k]
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prefix := url.QueryEscape(k) + "="
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for _, v := range vs {
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if buf.Len() > 0 {
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buf.WriteByte('&')
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}
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buf.WriteString(prefix)
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buf.WriteString(v)
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}
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}
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return buf.String()
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}
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