|
|
@@ -1,124 +0,0 @@
|
|
|
-// Copyright 2015 The go-ethereum Authors
|
|
|
-// This file is part of the go-ethereum library.
|
|
|
-//
|
|
|
-// The go-ethereum library is free software: you can redistribute it and/or modify
|
|
|
-// it under the terms of the GNU Lesser General Public License as published by
|
|
|
-// the Free Software Foundation, either version 3 of the License, or
|
|
|
-// (at your option) any later version.
|
|
|
-//
|
|
|
-// The go-ethereum library is distributed in the hope that it will be useful,
|
|
|
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
|
-// GNU Lesser General Public License for more details.
|
|
|
-//
|
|
|
-// You should have received a copy of the GNU Lesser General Public License
|
|
|
-// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
|
|
|
-
|
|
|
-package httpclient
|
|
|
-
|
|
|
-import (
|
|
|
- "fmt"
|
|
|
- "io/ioutil"
|
|
|
- "net/http"
|
|
|
- "path/filepath"
|
|
|
-
|
|
|
- "github.com/ethereum/go-ethereum/common"
|
|
|
- "github.com/ethereum/go-ethereum/crypto"
|
|
|
-)
|
|
|
-
|
|
|
-type HTTPClient struct {
|
|
|
- *http.Transport
|
|
|
- DocRoot string
|
|
|
- schemes []string
|
|
|
-}
|
|
|
-
|
|
|
-func New(docRoot string) (self *HTTPClient) {
|
|
|
- self = &HTTPClient{
|
|
|
- Transport: &http.Transport{},
|
|
|
- DocRoot: docRoot,
|
|
|
- schemes: []string{"file"},
|
|
|
- }
|
|
|
- self.RegisterProtocol("file", http.NewFileTransport(http.Dir(self.DocRoot)))
|
|
|
- return
|
|
|
-}
|
|
|
-
|
|
|
-// Clients should be reused instead of created as needed. Clients are safe for concurrent use by multiple goroutines.
|
|
|
-
|
|
|
-// A Client is higher-level than a RoundTripper (such as Transport) and additionally handles HTTP details such as cookies and redirects.
|
|
|
-
|
|
|
-func (self *HTTPClient) Client() *http.Client {
|
|
|
- return &http.Client{
|
|
|
- Transport: self,
|
|
|
- }
|
|
|
-}
|
|
|
-
|
|
|
-func (self *HTTPClient) RegisterScheme(scheme string, rt http.RoundTripper) {
|
|
|
- self.schemes = append(self.schemes, scheme)
|
|
|
- self.RegisterProtocol(scheme, rt)
|
|
|
-}
|
|
|
-
|
|
|
-func (self *HTTPClient) HasScheme(scheme string) bool {
|
|
|
- for _, s := range self.schemes {
|
|
|
- if s == scheme {
|
|
|
- return true
|
|
|
- }
|
|
|
- }
|
|
|
- return false
|
|
|
-}
|
|
|
-
|
|
|
-func (self *HTTPClient) GetAuthContent(uri string, hash common.Hash) ([]byte, error) {
|
|
|
- // retrieve content
|
|
|
- content, err := self.Get(uri, "")
|
|
|
- if err != nil {
|
|
|
- return nil, err
|
|
|
- }
|
|
|
-
|
|
|
- // check hash to authenticate content
|
|
|
- chash := crypto.Keccak256Hash(content)
|
|
|
- if chash != hash {
|
|
|
- return nil, fmt.Errorf("content hash mismatch %x != %x (exp)", hash[:], chash[:])
|
|
|
- }
|
|
|
-
|
|
|
- return content, nil
|
|
|
-
|
|
|
-}
|
|
|
-
|
|
|
-// Get(uri, path) downloads the document at uri, if path is non-empty it
|
|
|
-// is interpreted as a filepath to which the contents are saved
|
|
|
-func (self *HTTPClient) Get(uri, path string) ([]byte, error) {
|
|
|
- // retrieve content
|
|
|
- resp, err := self.Client().Get(uri)
|
|
|
- if err != nil {
|
|
|
- return nil, err
|
|
|
- }
|
|
|
- defer func() {
|
|
|
- if resp != nil {
|
|
|
- resp.Body.Close()
|
|
|
- }
|
|
|
- }()
|
|
|
-
|
|
|
- var content []byte
|
|
|
- content, err = ioutil.ReadAll(resp.Body)
|
|
|
- if err != nil {
|
|
|
- return nil, err
|
|
|
- }
|
|
|
-
|
|
|
- if resp.StatusCode/100 != 2 {
|
|
|
- return content, fmt.Errorf("HTTP error: %s", resp.Status)
|
|
|
- }
|
|
|
-
|
|
|
- if path != "" {
|
|
|
- var abspath string
|
|
|
- abspath, err = filepath.Abs(path)
|
|
|
- if err != nil {
|
|
|
- return nil, err
|
|
|
- }
|
|
|
- err = ioutil.WriteFile(abspath, content, 0600)
|
|
|
- if err != nil {
|
|
|
- return nil, err
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- return content, nil
|
|
|
-
|
|
|
-}
|