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go-library/vendor/github.com/go-openapi/swag/loading.go

122 lines
3.6 KiB

// Copyright 2015 go-swagger maintainers
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package swag
import (
"fmt"
"io"
"log"
"net/http"
"net/url"
"os"
"path/filepath"
"runtime"
"strings"
"time"
)
// LoadHTTPTimeout the default timeout for load requests
var LoadHTTPTimeout = 30 * time.Second
// LoadHTTPBasicAuthUsername the username to use when load requests require basic auth
var LoadHTTPBasicAuthUsername = ""
// LoadHTTPBasicAuthPassword the password to use when load requests require basic auth
var LoadHTTPBasicAuthPassword = ""
// LoadHTTPCustomHeaders an optional collection of custom HTTP headers for load requests
var LoadHTTPCustomHeaders = map[string]string{}
// LoadFromFileOrHTTP loads the bytes from a file or a remote http server based on the path passed in
func LoadFromFileOrHTTP(path string) ([]byte, error) {
return LoadStrategy(path, os.ReadFile, loadHTTPBytes(LoadHTTPTimeout))(path)
}
// LoadFromFileOrHTTPWithTimeout loads the bytes from a file or a remote http server based on the path passed in
// timeout arg allows for per request overriding of the request timeout
func LoadFromFileOrHTTPWithTimeout(path string, timeout time.Duration) ([]byte, error) {
return LoadStrategy(path, os.ReadFile, loadHTTPBytes(timeout))(path)
}
// LoadStrategy returns a loader function for a given path or uri
func LoadStrategy(path string, local, remote func(string) ([]byte, error)) func(string) ([]byte, error) {
if strings.HasPrefix(path, "http") {
return remote
}
return func(pth string) ([]byte, error) {
upth, err := pathUnescape(pth)
if err != nil {
return nil, err
}
if strings.HasPrefix(pth, `file://`) {
if runtime.GOOS == "windows" {
// support for canonical file URIs on windows.
// Zero tolerance here for dodgy URIs.
u, _ := url.Parse(upth)
if u.Host != "" {
// assume UNC name (volume share)
// file://host/share/folder\... ==> \\host\share\path\folder
// NOTE: UNC port not yet supported
upth = strings.Join([]string{`\`, u.Host, u.Path}, `\`)
} else {
// file:///c:/folder/... ==> just remove the leading slash
upth = strings.TrimPrefix(upth, `file:///`)
}
} else {
upth = strings.TrimPrefix(upth, `file://`)
}
}
return local(filepath.FromSlash(upth))
}
}
func loadHTTPBytes(timeout time.Duration) func(path string) ([]byte, error) {
return func(path string) ([]byte, error) {
client := &http.Client{Timeout: timeout}
req, err := http.NewRequest(http.MethodGet, path, nil) //nolint:noctx
if err != nil {
return nil, err
}
if LoadHTTPBasicAuthUsername != "" && LoadHTTPBasicAuthPassword != "" {
req.SetBasicAuth(LoadHTTPBasicAuthUsername, LoadHTTPBasicAuthPassword)
}
for key, val := range LoadHTTPCustomHeaders {
req.Header.Set(key, val)
}
resp, err := client.Do(req)
defer func() {
if resp != nil {
if e := resp.Body.Close(); e != nil {
log.Println(e)
}
}
}()
if err != nil {
return nil, err
}
if resp.StatusCode != http.StatusOK {
return nil, fmt.Errorf("could not access document at %q [%s] ", path, resp.Status)
}
return io.ReadAll(resp.Body)
}
}