121 lines
3.6 KiB
Go
121 lines
3.6 KiB
Go
// Copyright 2015 go-swagger maintainers
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//
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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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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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package swag
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import (
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"fmt"
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"io/ioutil"
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"log"
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"net/http"
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"net/url"
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"path/filepath"
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"runtime"
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"strings"
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"time"
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)
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// LoadHTTPTimeout the default timeout for load requests
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var LoadHTTPTimeout = 30 * time.Second
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// LoadHTTPBasicAuthUsername the username to use when load requests require basic auth
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var LoadHTTPBasicAuthUsername = ""
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// LoadHTTPBasicAuthPassword the password to use when load requests require basic auth
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var LoadHTTPBasicAuthPassword = ""
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// LoadHTTPCustomHeaders an optional collection of custom HTTP headers for load requests
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var LoadHTTPCustomHeaders = map[string]string{}
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// LoadFromFileOrHTTP loads the bytes from a file or a remote http server based on the path passed in
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func LoadFromFileOrHTTP(path string) ([]byte, error) {
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return LoadStrategy(path, ioutil.ReadFile, loadHTTPBytes(LoadHTTPTimeout))(path)
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}
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// LoadFromFileOrHTTPWithTimeout loads the bytes from a file or a remote http server based on the path passed in
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// timeout arg allows for per request overriding of the request timeout
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func LoadFromFileOrHTTPWithTimeout(path string, timeout time.Duration) ([]byte, error) {
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return LoadStrategy(path, ioutil.ReadFile, loadHTTPBytes(timeout))(path)
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}
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// LoadStrategy returns a loader function for a given path or uri
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func LoadStrategy(path string, local, remote func(string) ([]byte, error)) func(string) ([]byte, error) {
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if strings.HasPrefix(path, "http") {
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return remote
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}
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return func(pth string) ([]byte, error) {
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upth, err := pathUnescape(pth)
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if err != nil {
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return nil, err
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}
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if strings.HasPrefix(pth, `file://`) {
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if runtime.GOOS == "windows" {
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// support for canonical file URIs on windows.
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// Zero tolerance here for dodgy URIs.
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u, _ := url.Parse(upth)
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if u.Host != "" {
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// assume UNC name (volume share)
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// file://host/share/folder\... ==> \\host\share\path\folder
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// NOTE: UNC port not yet supported
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upth = strings.Join([]string{`\`, u.Host, u.Path}, `\`)
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} else {
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// file:///c:/folder/... ==> just remove the leading slash
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upth = strings.TrimPrefix(upth, `file:///`)
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}
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} else {
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upth = strings.TrimPrefix(upth, `file://`)
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}
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}
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return local(filepath.FromSlash(upth))
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}
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}
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func loadHTTPBytes(timeout time.Duration) func(path string) ([]byte, error) {
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return func(path string) ([]byte, error) {
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client := &http.Client{Timeout: timeout}
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req, err := http.NewRequest("GET", path, nil) // nolint: noctx
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if err != nil {
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return nil, err
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}
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if LoadHTTPBasicAuthUsername != "" && LoadHTTPBasicAuthPassword != "" {
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req.SetBasicAuth(LoadHTTPBasicAuthUsername, LoadHTTPBasicAuthPassword)
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}
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for key, val := range LoadHTTPCustomHeaders {
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req.Header.Set(key, val)
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}
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resp, err := client.Do(req)
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defer func() {
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if resp != nil {
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if e := resp.Body.Close(); e != nil {
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log.Println(e)
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}
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}
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}()
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if err != nil {
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return nil, err
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}
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if resp.StatusCode != http.StatusOK {
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return nil, fmt.Errorf("could not access document at %q [%s] ", path, resp.Status)
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}
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return ioutil.ReadAll(resp.Body)
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}
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}
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