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netdisk.go
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netdisk.go
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package baidu
import (
"bytes"
"context"
"encoding/json"
"errors"
"fmt"
"io"
"log"
"mime/multipart"
"net/http"
"os"
"path/filepath"
"strings"
"time"
)
const (
//用户授权跳转
authorizeUrl = "https://openapi.baidu.com/oauth/2.0/authorize?response_type=code&client_id=__CLIENT_ID__&redirect_uri=__REGISTERED_REDIRECT_URI__&scope=basic,netdisk&display=tv&qrcode=1&force_login=0"
//token换取access_token链接
tokenUrl = "https://openapi.baidu.com/oauth/2.0/token?grant_type=authorization_code&code=__CODE__&client_id=__CLIENT_ID__&client_secret=__CLIENT_SECRET__&redirect_uri=__REGISTERED_REDIRECT_URI__"
//刷新Token有效期链接
refreshTokenUrl = "https://openapi.baidu.com/oauth/2.0/token?grant_type=refresh_token&refresh_token=__REFRESH_TOKEN__&client_id=__API_KEY__&client_secret=__SECRET_KEY__"
//获取用户信息
userInfoUrl = "https://pan.baidu.com/rest/2.0/xpan/nas?method=uinfo&access_token=__ACCESS_TOKEN__"
//预创建文件
preCreateFileUrl = "https://pan.baidu.com/rest/2.0/xpan/file?method=precreate&access_token=__ACCESS_TOKEN__"
//分片上传文件
uploadFileUrl = "https://d.pcs.baidu.com/rest/2.0/pcs/superfile2?"
//创建文件
createFileUrl = "https://pan.baidu.com/rest/2.0/xpan/file?method=create&access_token=__ACCESS_TOKEN__"
)
type NetDisk struct {
appId string
appKey string
secretKey string
signKey string
isDebug bool
token *TokenResponse
user *UserInfo
log *log.Logger
}
func NewNetDisk(appId, appKey, secretKey, signKey string) *NetDisk {
return &NetDisk{
appId: appId,
appKey: appKey,
secretKey: secretKey,
signKey: signKey,
log: log.New(os.Stderr, "", log.LstdFlags|log.Lshortfile),
}
}
func (d *NetDisk) IsDebug(isDebug bool) {
d.isDebug = isDebug
}
//AuthorizeURI 获取用户授权页面.
func (d *NetDisk) AuthorizeURI(registeredUrl string, display string) string {
urlStr := strings.ReplaceAll(authorizeUrl, "__CLIENT_ID__", d.appKey)
urlStr = strings.ReplaceAll(urlStr, "__REGISTERED_REDIRECT_URI__", registeredUrl)
if display != "" {
urlStr += "&display=" + display
}
return urlStr
}
//GetAccessToken 获取access_token值.
func (d *NetDisk) GetAccessToken(code, registeredUrl string) (*TokenResponse, error) {
d.printf("开始申请access_token:code=%s; registered_url=%s", code, registeredUrl)
if d.token != nil {
d.printf("已存在access_token则复用:code=%s; registered_url=%s", code, registeredUrl)
if d.token.IsExpired() {
d.printf("access_token已过期则刷新token:code=%s; registered_url=%s", code, registeredUrl)
if err := d.RefreshToken(true); err == nil {
return d.token.Clone(), nil
} else {
d.printf("刷新token失败:code=%s; registered_url=%s; error=%+v", code, registeredUrl, err)
}
} else {
return d.token.Clone(), nil
}
}
urlStr := strings.ReplaceAll(tokenUrl, "__CODE__", code)
urlStr = strings.ReplaceAll(urlStr, "__CLIENT_ID__", d.appKey)
urlStr = strings.ReplaceAll(urlStr, "__CLIENT_SECRET__", d.secretKey)
urlStr = strings.ReplaceAll(urlStr, "__REGISTERED_REDIRECT_URI__", registeredUrl)
resp, err := http.Get(urlStr)
if err != nil {
d.printf("发起申请token请求失败:code=%s; registered_url=%s; error=%+v", code, registeredUrl, err)
return nil, err
}
defer resp.Body.Close()
body, err := io.ReadAll(resp.Body)
if err != nil {
d.printf("读取申请token结果:code=%s; registered_url=%s; response_body=%s,error=%+v", code, registeredUrl, string(body), err)
return nil, err
}
var errResp ErrorResponse
err = json.Unmarshal(body, &errResp)
if err != nil {
d.printf("解析响应结果失败:code=%s; registered_url=%s; response_body=%s,error=%+v", code, registeredUrl, string(body), err)
return nil, err
}
if errResp.Error != "" {
d.printf("申请token失败:code=%s; registered_url=%s; response_body=%s,error=%s", code, registeredUrl, string(body), errResp.String())
return nil, errors.New(errResp.Error + " " + errResp.ErrorDescription)
}
tokenResp := errResp.TokenResponse
tokenResp.CreateAt = time.Now().Unix()
tokenResp.RefreshTokenCreateAt = time.Now().Unix()
d.token = (&tokenResp).Clone()
return &tokenResp, err
}
func (d *NetDisk) SetAccessToken(token *TokenResponse) {
d.token = token.Clone()
}
func (d *NetDisk) AutoRefreshToken(ctx context.Context) error {
if d.token == nil {
return ErrAccessTokenEmpty
}
err := d.RefreshToken(false)
if err != nil {
return err
}
interval := time.Duration(d.token.ExpiresIn-1) * time.Second
t := time.NewTicker(interval)
for {
select {
case <-t.C:
err = d.RefreshToken(true)
if err != nil {
d.printf("刷新access_token失败 -> %+v", err)
} else {
interval = time.Duration(d.token.ExpiresIn-1) * time.Second
}
t.Reset(interval)
case <-ctx.Done():
return ctx.Err()
}
}
}
//RefreshToken 刷新access_token值.
func (d *NetDisk) RefreshToken(force bool) error {
if d.token == nil || d.token.IsRefreshTokenExpired() {
d.printf("access_token未授权或已过期")
return ErrRefreshTokenExpired
}
if !force && !d.token.IsExpired() {
return nil
}
urlStr := strings.ReplaceAll(refreshTokenUrl, "__REFRESH_TOKEN__", d.token.RefreshToken)
urlStr = strings.ReplaceAll(urlStr, "__CLIENT_ID__", d.appKey)
urlStr = strings.ReplaceAll(urlStr, "__CLIENT_SECRET__", d.secretKey)
resp, err := http.Get(urlStr)
if err != nil {
d.printf("刷新access_token失败:error:%+v", err)
return err
}
defer resp.Body.Close()
body, err := io.ReadAll(resp.Body)
if err != nil {
d.printf("刷新access_token失败:error:%+v", err)
return err
}
var errResp ErrorResponse
err = json.Unmarshal(body, &errResp)
if err != nil {
d.printf("刷新access_token失败:response_body=%s; error:%+v", string(body), err)
return err
}
if errResp.Error == "" {
return errors.New(errResp.Error + " " + errResp.ErrorDescription)
}
var tokenResp TokenResponse
err = json.Unmarshal(body, &tokenResp)
if err == nil {
tokenResp.CreateAt = time.Now().Unix()
d.token = &tokenResp
} else {
d.printf("刷新access_token失败:error:%+v", err)
}
return err
}
//UserInfo 获取用户信息.
func (d *NetDisk) UserInfo() (*UserInfo, error) {
if d.user != nil {
return d.user.Clone(), nil
}
if d.token == nil {
d.printf("未授权access_token")
return nil, ErrAccessTokenEmpty
}
if d.token.IsExpired() {
return nil, ErrAccessTokenExpired
}
urlStr := strings.ReplaceAll(userInfoUrl, "__ACCESS_TOKEN__", d.token.AccessToken)
resp, err := http.Get(urlStr)
if err != nil {
return nil, err
}
defer resp.Body.Close()
body, err := io.ReadAll(resp.Body)
if err != nil {
return nil, err
}
var userinfo UserInfo
err = json.Unmarshal(body, &userinfo)
if err != nil {
return nil, err
}
d.user = &userinfo
return d.user.Clone(), nil
}
//PreCreate 预创建文件.
func (d *NetDisk) PreCreate(uploadFile *PreCreateUploadFileParam) (*PreCreateUploadFile, error) {
if d.token == nil {
return nil, ErrAccessTokenEmpty
}
if d.token.IsExpired() {
return nil, ErrAccessTokenExpired
}
urlStr := strings.ReplaceAll(preCreateFileUrl, "__ACCESS_TOKEN__", d.token.AccessToken)
resp, err := http.PostForm(urlStr, uploadFile.Values())
if err != nil {
return nil, err
}
defer resp.Body.Close()
body, err := io.ReadAll(resp.Body)
if err != nil {
d.printf("读取预创建文件结果失败 -> %s", err)
return nil, err
}
var preUploadFile PreCreateUploadFile
err = json.Unmarshal(body, &preUploadFile)
if err != nil {
d.printf("解析预创建文件结果失败 -> %s", string(body))
}
return &preUploadFile, err
}
//UploadFile 上传指定路径的文件.
func (d *NetDisk) UploadFile(uploadFile *PreCreateUploadFile, localFile string) ([]SuperFile, error) {
if d.token == nil {
return nil, ErrAccessTokenEmpty
}
if d.token.IsExpired() {
return nil, ErrAccessTokenExpired
}
f, err := os.Open(localFile)
if err != nil {
d.printf("打开文件失败 -> [filename=%s] %+v", localFile, err)
return nil, err
}
defer f.Close()
superFiles, err := d.UploadFiles(uploadFile, f)
if err != nil {
d.printf("上传文件到百度网盘失败 -> %s - %+v", uploadFile, err)
return nil, fmt.Errorf("upload file fail: filename:%s; error:%w", localFile, errors.Unwrap(err))
}
return superFiles, nil
}
//UploadFiles 批量上传文件.
func (d *NetDisk) UploadFiles(uploadFile *PreCreateUploadFile, reader io.Reader) ([]SuperFile, error) {
if d.token == nil {
return nil, ErrAccessTokenEmpty
}
if d.token.IsExpired() {
return nil, ErrAccessTokenExpired
}
param := SuperFileParam{
AccessToken: d.token.AccessToken,
Path: uploadFile.Path,
UploadId: uploadFile.UploadId,
}
var superFiles []SuperFile
b := make([]byte, 4096*1024)
for i := 0; ; i++ {
n, err := io.ReadFull(reader, b)
if err == io.EOF {
break
}
param.PartSeq = i
urlStr := uploadFileUrl + param.Values().Encode()
body := bytes.NewBufferString("")
bodyWriter := multipart.NewWriter(body)
fileWriter, err := bodyWriter.CreateFormFile("file", filepath.Base(uploadFile.Path))
if err != nil {
d.printf("初始化文件shibai -> %+v", err)
return nil, err
}
_, err = fileWriter.Write(b[:n])
contentType := bodyWriter.FormDataContentType()
_ = bodyWriter.Close()
resp, err := http.Post(urlStr, contentType, body)
if err != nil {
return nil, fmt.Errorf("file index:%d, error:%w", i, err)
}
respBody, err := io.ReadAll(resp.Body)
_ = resp.Body.Close()
if err != nil {
return nil, fmt.Errorf("file index:%d, error:%w", i, err)
}
var superFile SuperFile
err = json.Unmarshal(respBody, &superFile)
if err != nil {
return nil, fmt.Errorf("file index:%d;resp: %s; error:%w", i, string(respBody), err)
}
if superFile.ErrorNo != 0 {
return nil, fmt.Errorf("分片上传文件失败 -> [resp:%s] [errcode:%d] [errormsg:%s]", string(respBody), superFile.ErrorNo, superFile.ErrorMsg)
}
d.printf("分片上传成功->[index:%d] [size:%d] [resp:%s]", i, n, string(respBody))
superFiles = append(superFiles, superFile)
}
return superFiles, nil
}
func (d *NetDisk) CreateFile(uploadFile *CreateFileParam) (*CreateFile, error) {
if d.token == nil {
return nil, ErrAccessTokenEmpty
}
if d.token.IsExpired() {
return nil, ErrAccessTokenExpired
}
urlStr := strings.ReplaceAll(createFileUrl, "__ACCESS_TOKEN__", d.token.AccessToken)
resp, err := http.PostForm(urlStr, uploadFile.Values())
if err != nil {
return nil, err
}
defer resp.Body.Close()
body, err := io.ReadAll(resp.Body)
if err != nil {
return nil, err
}
d.printf("最终创建文件响应值 ->%s", string(body))
var createFile CreateFile
err = json.Unmarshal(body, &createFile)
if createFile.ErrNo != 0 {
return nil, fmt.Errorf("创建文件失败 -> [errno=%d]", createFile.ErrNo)
}
return &createFile, err
}
func (d *NetDisk) printf(format string, v ...interface{}) {
if d.isDebug {
if len(v) == 0 {
_ = d.log.Output(2, format)
} else {
_ = d.log.Output(2, fmt.Sprintf(format, v...))
}
}
}