acae5dcfff
Updated to latest version of go aws sdk. Use vendored sub pakages within aws sdk. Adds missing vendor packages for letsencrypt Fixes #1832 Signed-off-by: Derek McGowan <derek@mcgstyle.net> (github: dmcgowan)
256 lines
6 KiB
Go
256 lines
6 KiB
Go
// Package rest provides RESTful serialization of AWS requests and responses.
|
|
package rest
|
|
|
|
import (
|
|
"bytes"
|
|
"encoding/base64"
|
|
"fmt"
|
|
"io"
|
|
"net/http"
|
|
"net/url"
|
|
"path"
|
|
"reflect"
|
|
"strconv"
|
|
"strings"
|
|
"time"
|
|
|
|
"github.com/aws/aws-sdk-go/aws/awserr"
|
|
"github.com/aws/aws-sdk-go/aws/request"
|
|
)
|
|
|
|
// RFC822 returns an RFC822 formatted timestamp for AWS protocols
|
|
const RFC822 = "Mon, 2 Jan 2006 15:04:05 GMT"
|
|
|
|
// Whether the byte value can be sent without escaping in AWS URLs
|
|
var noEscape [256]bool
|
|
|
|
var errValueNotSet = fmt.Errorf("value not set")
|
|
|
|
func init() {
|
|
for i := 0; i < len(noEscape); i++ {
|
|
// AWS expects every character except these to be escaped
|
|
noEscape[i] = (i >= 'A' && i <= 'Z') ||
|
|
(i >= 'a' && i <= 'z') ||
|
|
(i >= '0' && i <= '9') ||
|
|
i == '-' ||
|
|
i == '.' ||
|
|
i == '_' ||
|
|
i == '~'
|
|
}
|
|
}
|
|
|
|
// BuildHandler is a named request handler for building rest protocol requests
|
|
var BuildHandler = request.NamedHandler{Name: "awssdk.rest.Build", Fn: Build}
|
|
|
|
// Build builds the REST component of a service request.
|
|
func Build(r *request.Request) {
|
|
if r.ParamsFilled() {
|
|
v := reflect.ValueOf(r.Params).Elem()
|
|
buildLocationElements(r, v)
|
|
buildBody(r, v)
|
|
}
|
|
}
|
|
|
|
func buildLocationElements(r *request.Request, v reflect.Value) {
|
|
query := r.HTTPRequest.URL.Query()
|
|
|
|
for i := 0; i < v.NumField(); i++ {
|
|
m := v.Field(i)
|
|
if n := v.Type().Field(i).Name; n[0:1] == strings.ToLower(n[0:1]) {
|
|
continue
|
|
}
|
|
|
|
if m.IsValid() {
|
|
field := v.Type().Field(i)
|
|
name := field.Tag.Get("locationName")
|
|
if name == "" {
|
|
name = field.Name
|
|
}
|
|
if m.Kind() == reflect.Ptr {
|
|
m = m.Elem()
|
|
}
|
|
if !m.IsValid() {
|
|
continue
|
|
}
|
|
|
|
var err error
|
|
switch field.Tag.Get("location") {
|
|
case "headers": // header maps
|
|
err = buildHeaderMap(&r.HTTPRequest.Header, m, field.Tag.Get("locationName"))
|
|
case "header":
|
|
err = buildHeader(&r.HTTPRequest.Header, m, name)
|
|
case "uri":
|
|
err = buildURI(r.HTTPRequest.URL, m, name)
|
|
case "querystring":
|
|
err = buildQueryString(query, m, name)
|
|
}
|
|
r.Error = err
|
|
}
|
|
if r.Error != nil {
|
|
return
|
|
}
|
|
}
|
|
|
|
r.HTTPRequest.URL.RawQuery = query.Encode()
|
|
updatePath(r.HTTPRequest.URL, r.HTTPRequest.URL.Path)
|
|
}
|
|
|
|
func buildBody(r *request.Request, v reflect.Value) {
|
|
if field, ok := v.Type().FieldByName("_"); ok {
|
|
if payloadName := field.Tag.Get("payload"); payloadName != "" {
|
|
pfield, _ := v.Type().FieldByName(payloadName)
|
|
if ptag := pfield.Tag.Get("type"); ptag != "" && ptag != "structure" {
|
|
payload := reflect.Indirect(v.FieldByName(payloadName))
|
|
if payload.IsValid() && payload.Interface() != nil {
|
|
switch reader := payload.Interface().(type) {
|
|
case io.ReadSeeker:
|
|
r.SetReaderBody(reader)
|
|
case []byte:
|
|
r.SetBufferBody(reader)
|
|
case string:
|
|
r.SetStringBody(reader)
|
|
default:
|
|
r.Error = awserr.New("SerializationError",
|
|
"failed to encode REST request",
|
|
fmt.Errorf("unknown payload type %s", payload.Type()))
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
func buildHeader(header *http.Header, v reflect.Value, name string) error {
|
|
str, err := convertType(v)
|
|
if err == errValueNotSet {
|
|
return nil
|
|
} else if err != nil {
|
|
return awserr.New("SerializationError", "failed to encode REST request", err)
|
|
}
|
|
|
|
header.Add(name, str)
|
|
|
|
return nil
|
|
}
|
|
|
|
func buildHeaderMap(header *http.Header, v reflect.Value, prefix string) error {
|
|
for _, key := range v.MapKeys() {
|
|
str, err := convertType(v.MapIndex(key))
|
|
if err == errValueNotSet {
|
|
continue
|
|
} else if err != nil {
|
|
return awserr.New("SerializationError", "failed to encode REST request", err)
|
|
|
|
}
|
|
|
|
header.Add(prefix+key.String(), str)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func buildURI(u *url.URL, v reflect.Value, name string) error {
|
|
value, err := convertType(v)
|
|
if err == errValueNotSet {
|
|
return nil
|
|
} else if err != nil {
|
|
return awserr.New("SerializationError", "failed to encode REST request", err)
|
|
}
|
|
|
|
uri := u.Path
|
|
uri = strings.Replace(uri, "{"+name+"}", EscapePath(value, true), -1)
|
|
uri = strings.Replace(uri, "{"+name+"+}", EscapePath(value, false), -1)
|
|
u.Path = uri
|
|
|
|
return nil
|
|
}
|
|
|
|
func buildQueryString(query url.Values, v reflect.Value, name string) error {
|
|
switch value := v.Interface().(type) {
|
|
case []*string:
|
|
for _, item := range value {
|
|
query.Add(name, *item)
|
|
}
|
|
case map[string]*string:
|
|
for key, item := range value {
|
|
query.Add(key, *item)
|
|
}
|
|
case map[string][]*string:
|
|
for key, items := range value {
|
|
for _, item := range items {
|
|
query.Add(key, *item)
|
|
}
|
|
}
|
|
default:
|
|
str, err := convertType(v)
|
|
if err == errValueNotSet {
|
|
return nil
|
|
} else if err != nil {
|
|
return awserr.New("SerializationError", "failed to encode REST request", err)
|
|
}
|
|
query.Set(name, str)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func updatePath(url *url.URL, urlPath string) {
|
|
scheme, query := url.Scheme, url.RawQuery
|
|
|
|
hasSlash := strings.HasSuffix(urlPath, "/")
|
|
|
|
// clean up path
|
|
urlPath = path.Clean(urlPath)
|
|
if hasSlash && !strings.HasSuffix(urlPath, "/") {
|
|
urlPath += "/"
|
|
}
|
|
|
|
// get formatted URL minus scheme so we can build this into Opaque
|
|
url.Scheme, url.Path, url.RawQuery = "", "", ""
|
|
s := url.String()
|
|
url.Scheme = scheme
|
|
url.RawQuery = query
|
|
|
|
// build opaque URI
|
|
url.Opaque = s + urlPath
|
|
}
|
|
|
|
// EscapePath escapes part of a URL path in Amazon style
|
|
func EscapePath(path string, encodeSep bool) string {
|
|
var buf bytes.Buffer
|
|
for i := 0; i < len(path); i++ {
|
|
c := path[i]
|
|
if noEscape[c] || (c == '/' && !encodeSep) {
|
|
buf.WriteByte(c)
|
|
} else {
|
|
fmt.Fprintf(&buf, "%%%02X", c)
|
|
}
|
|
}
|
|
return buf.String()
|
|
}
|
|
|
|
func convertType(v reflect.Value) (string, error) {
|
|
v = reflect.Indirect(v)
|
|
if !v.IsValid() {
|
|
return "", errValueNotSet
|
|
}
|
|
|
|
var str string
|
|
switch value := v.Interface().(type) {
|
|
case string:
|
|
str = value
|
|
case []byte:
|
|
str = base64.StdEncoding.EncodeToString(value)
|
|
case bool:
|
|
str = strconv.FormatBool(value)
|
|
case int64:
|
|
str = strconv.FormatInt(value, 10)
|
|
case float64:
|
|
str = strconv.FormatFloat(value, 'f', -1, 64)
|
|
case time.Time:
|
|
str = value.UTC().Format(RFC822)
|
|
default:
|
|
err := fmt.Errorf("Unsupported value for param %v (%s)", v.Interface(), v.Type())
|
|
return "", err
|
|
}
|
|
return str, nil
|
|
}
|