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8b064fa4be
Bumping version to include changes that better handle TLS errors. Bump nescessary to prepare for when the version of Go is bumped to 1.20 Signed-off-by: Madhav Jivrajani <madhav.jiv@gmail.com>
115 lines
3.0 KiB
Go
115 lines
3.0 KiB
Go
/*
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Copyright (c) 2019 VMware, Inc. All Rights Reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package rest
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import (
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"bytes"
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"encoding/json"
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"io"
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"net/http"
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"net/url"
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)
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const (
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Path = "/rest"
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)
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// Resource wraps url.URL with helpers
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type Resource struct {
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u *url.URL
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}
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func (r *Resource) String() string {
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return r.u.String()
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}
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// WithID appends id to the URL.Path
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func (r *Resource) WithID(id string) *Resource {
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r.u.Path += "/id:" + id
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return r
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}
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// WithAction sets adds action to the URL.RawQuery
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func (r *Resource) WithAction(action string) *Resource {
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return r.WithParam("~action", action)
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}
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// WithParam adds one parameter on the URL.RawQuery
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func (r *Resource) WithParam(name string, value string) *Resource {
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// ParseQuery handles empty case, and we control access to query string so shouldn't encounter an error case
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params, err := url.ParseQuery(r.u.RawQuery)
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if err != nil {
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panic(err)
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}
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params[name] = append(params[name], value)
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r.u.RawQuery = params.Encode()
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return r
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}
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// WithPathEncodedParam appends a parameter on the URL.RawQuery,
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// For special cases where URL Path-style encoding is needed
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func (r *Resource) WithPathEncodedParam(name string, value string) *Resource {
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t := &url.URL{Path: value}
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encodedValue := t.String()
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t = &url.URL{Path: name}
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encodedName := t.String()
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// ParseQuery handles empty case, and we control access to query string so shouldn't encounter an error case
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params, err := url.ParseQuery(r.u.RawQuery)
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if err != nil {
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panic(err)
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}
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// Values.Encode() doesn't escape exactly how we want, so we need to build the query string ourselves
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if len(params) >= 1 {
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r.u.RawQuery = r.u.RawQuery + "&" + encodedName + "=" + encodedValue
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} else {
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r.u.RawQuery = r.u.RawQuery + encodedName + "=" + encodedValue
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}
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return r
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}
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// Request returns a new http.Request for the given method.
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// An optional body can be provided for POST and PATCH methods.
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func (r *Resource) Request(method string, body ...interface{}) *http.Request {
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rdr := io.MultiReader() // empty body by default
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if len(body) != 0 {
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rdr = encode(body[0])
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}
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req, err := http.NewRequest(method, r.u.String(), rdr)
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if err != nil {
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panic(err)
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}
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return req
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}
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type errorReader struct {
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e error
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}
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func (e errorReader) Read([]byte) (int, error) {
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return -1, e.e
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}
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// encode body as JSON, deferring any errors until io.Reader is used.
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func encode(body interface{}) io.Reader {
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var b bytes.Buffer
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err := json.NewEncoder(&b).Encode(body)
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if err != nil {
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return errorReader{err}
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}
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return &b
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}
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