|
|
package request
|
|
|
|
|
|
import (
|
|
|
"context"
|
|
|
"encoding/json"
|
|
|
"errors"
|
|
|
"fmt"
|
|
|
model "github.com/HFO4/cloudreve/models"
|
|
|
"github.com/HFO4/cloudreve/pkg/auth"
|
|
|
"github.com/HFO4/cloudreve/pkg/serializer"
|
|
|
"github.com/HFO4/cloudreve/pkg/util"
|
|
|
"io"
|
|
|
"io/ioutil"
|
|
|
"net/http"
|
|
|
"time"
|
|
|
)
|
|
|
|
|
|
// GeneralClient 通用 HTTP Client
|
|
|
var GeneralClient Client = HTTPClient{}
|
|
|
|
|
|
// Response 请求的响应或错误信息
|
|
|
type Response struct {
|
|
|
Err error
|
|
|
Response *http.Response
|
|
|
}
|
|
|
|
|
|
// Client 请求客户端
|
|
|
type Client interface {
|
|
|
Request(method, target string, body io.Reader, opts ...Option) *Response
|
|
|
}
|
|
|
|
|
|
// HTTPClient 实现 Client 接口
|
|
|
type HTTPClient struct {
|
|
|
}
|
|
|
|
|
|
// Option 发送请求的额外设置
|
|
|
type Option interface {
|
|
|
apply(*options)
|
|
|
}
|
|
|
|
|
|
type options struct {
|
|
|
timeout time.Duration
|
|
|
header http.Header
|
|
|
sign auth.Auth
|
|
|
signTTL int64
|
|
|
ctx context.Context
|
|
|
contentLength int64
|
|
|
}
|
|
|
|
|
|
type optionFunc func(*options)
|
|
|
|
|
|
func (f optionFunc) apply(o *options) {
|
|
|
f(o)
|
|
|
}
|
|
|
|
|
|
func newDefaultOption() *options {
|
|
|
return &options{
|
|
|
header: http.Header{},
|
|
|
timeout: time.Duration(30) * time.Second,
|
|
|
contentLength: -1,
|
|
|
}
|
|
|
}
|
|
|
|
|
|
// WithTimeout 设置请求超时
|
|
|
func WithTimeout(t time.Duration) Option {
|
|
|
return optionFunc(func(o *options) {
|
|
|
o.timeout = t
|
|
|
})
|
|
|
}
|
|
|
|
|
|
// WithContext 设置请求上下文
|
|
|
func WithContext(c context.Context) Option {
|
|
|
return optionFunc(func(o *options) {
|
|
|
o.ctx = c
|
|
|
})
|
|
|
}
|
|
|
|
|
|
// WithCredential 对请求进行签名
|
|
|
func WithCredential(instance auth.Auth, ttl int64) Option {
|
|
|
return optionFunc(func(o *options) {
|
|
|
o.sign = instance
|
|
|
o.signTTL = ttl
|
|
|
})
|
|
|
}
|
|
|
|
|
|
// WithHeader 设置请求Header
|
|
|
func WithHeader(header http.Header) Option {
|
|
|
return optionFunc(func(o *options) {
|
|
|
for k, v := range header {
|
|
|
o.header[k] = v
|
|
|
}
|
|
|
})
|
|
|
}
|
|
|
|
|
|
// WithoutHeader 设置清除请求Header
|
|
|
func WithoutHeader(header []string) Option {
|
|
|
return optionFunc(func(o *options) {
|
|
|
for _, v := range header {
|
|
|
delete(o.header, v)
|
|
|
}
|
|
|
|
|
|
})
|
|
|
}
|
|
|
|
|
|
// WithContentLength 设置请求大小
|
|
|
func WithContentLength(s int64) Option {
|
|
|
return optionFunc(func(o *options) {
|
|
|
o.contentLength = s
|
|
|
})
|
|
|
}
|
|
|
|
|
|
// Request 发送HTTP请求
|
|
|
func (c HTTPClient) Request(method, target string, body io.Reader, opts ...Option) *Response {
|
|
|
// 应用额外设置
|
|
|
options := newDefaultOption()
|
|
|
for _, o := range opts {
|
|
|
o.apply(options)
|
|
|
}
|
|
|
|
|
|
// 创建请求客户端
|
|
|
client := &http.Client{Timeout: options.timeout}
|
|
|
|
|
|
// size为0时将body设为nil
|
|
|
if options.contentLength == 0 {
|
|
|
body = nil
|
|
|
}
|
|
|
|
|
|
// 创建请求
|
|
|
var (
|
|
|
req *http.Request
|
|
|
err error
|
|
|
)
|
|
|
if options.ctx != nil {
|
|
|
req, err = http.NewRequestWithContext(options.ctx, method, target, body)
|
|
|
} else {
|
|
|
req, err = http.NewRequest(method, target, body)
|
|
|
}
|
|
|
if err != nil {
|
|
|
return &Response{Err: err}
|
|
|
}
|
|
|
|
|
|
// 添加请求相关设置
|
|
|
req.Header = options.header
|
|
|
if options.contentLength != -1 {
|
|
|
req.ContentLength = options.contentLength
|
|
|
}
|
|
|
|
|
|
// 签名请求
|
|
|
if options.sign != nil {
|
|
|
auth.SignRequest(options.sign, req, options.signTTL)
|
|
|
}
|
|
|
|
|
|
// 发送请求
|
|
|
resp, err := client.Do(req)
|
|
|
if err != nil {
|
|
|
return &Response{Err: err}
|
|
|
}
|
|
|
|
|
|
return &Response{Err: nil, Response: resp}
|
|
|
}
|
|
|
|
|
|
// GetResponse 检查响应并获取响应正文
|
|
|
func (resp *Response) GetResponse() (string, error) {
|
|
|
if resp.Err != nil {
|
|
|
return "", resp.Err
|
|
|
}
|
|
|
respBody, err := ioutil.ReadAll(resp.Response.Body)
|
|
|
_ = resp.Response.Body.Close()
|
|
|
|
|
|
return string(respBody), err
|
|
|
}
|
|
|
|
|
|
// CheckHTTPResponse 检查请求响应HTTP状态码
|
|
|
func (resp *Response) CheckHTTPResponse(status int) *Response {
|
|
|
if resp.Err != nil {
|
|
|
return resp
|
|
|
}
|
|
|
|
|
|
// 检查HTTP状态码
|
|
|
if resp.Response.StatusCode != status {
|
|
|
resp.Err = fmt.Errorf("服务器返回非正常HTTP状态%d", resp.Response.StatusCode)
|
|
|
}
|
|
|
return resp
|
|
|
}
|
|
|
|
|
|
// DecodeResponse 尝试解析为serializer.Response，并对状态码进行检查
|
|
|
func (resp *Response) DecodeResponse() (*serializer.Response, error) {
|
|
|
if resp.Err != nil {
|
|
|
return nil, resp.Err
|
|
|
}
|
|
|
|
|
|
respString, err := resp.GetResponse()
|
|
|
if err != nil {
|
|
|
return nil, err
|
|
|
}
|
|
|
|
|
|
var res serializer.Response
|
|
|
err = json.Unmarshal([]byte(respString), &res)
|
|
|
if err != nil {
|
|
|
util.Log().Debug("无法解析回调服务端响应：%s", string(respString))
|
|
|
return nil, err
|
|
|
}
|
|
|
return &res, nil
|
|
|
}
|
|
|
|
|
|
// NopRSCloser 实现不完整seeker
|
|
|
type NopRSCloser struct {
|
|
|
body io.ReadCloser
|
|
|
status *rscStatus
|
|
|
}
|
|
|
|
|
|
type rscStatus struct {
|
|
|
// http.ServeContent 会读取一小块以决定内容类型，
|
|
|
// 但是响应body无法实现seek，所以此项为真时第一个read会返回假数据
|
|
|
IgnoreFirst bool
|
|
|
|
|
|
Size int64
|
|
|
}
|
|
|
|
|
|
// GetRSCloser 返回带有空seeker的RSCloser，供http.ServeContent使用
|
|
|
func (resp *Response) GetRSCloser() (*NopRSCloser, error) {
|
|
|
if resp.Err != nil {
|
|
|
return nil, resp.Err
|
|
|
}
|
|
|
|
|
|
return &NopRSCloser{
|
|
|
body: resp.Response.Body,
|
|
|
status: &rscStatus{
|
|
|
Size: resp.Response.ContentLength,
|
|
|
},
|
|
|
}, resp.Err
|
|
|
}
|
|
|
|
|
|
// SetFirstFakeChunk 开启第一次read返回空数据
|
|
|
// TODO 测试
|
|
|
func (instance NopRSCloser) SetFirstFakeChunk() {
|
|
|
instance.status.IgnoreFirst = true
|
|
|
}
|
|
|
|
|
|
// SetContentLength 设置数据流大小
|
|
|
func (instance NopRSCloser) SetContentLength(size int64) {
|
|
|
instance.status.Size = size
|
|
|
}
|
|
|
|
|
|
// Read 实现 NopRSCloser reader
|
|
|
func (instance NopRSCloser) Read(p []byte) (n int, err error) {
|
|
|
if instance.status.IgnoreFirst && len(p) == 512 {
|
|
|
return 0, io.EOF
|
|
|
}
|
|
|
return instance.body.Read(p)
|
|
|
}
|
|
|
|
|
|
// Close 实现 NopRSCloser closer
|
|
|
func (instance NopRSCloser) Close() error {
|
|
|
return instance.body.Close()
|
|
|
}
|
|
|
|
|
|
// Seek 实现 NopRSCloser seeker, 只实现seek开头/结尾以便http.ServeContent用于确定正文大小
|
|
|
func (instance NopRSCloser) Seek(offset int64, whence int) (int64, error) {
|
|
|
// 进行第一次Seek操作后，取消忽略选项
|
|
|
if instance.status.IgnoreFirst {
|
|
|
instance.status.IgnoreFirst = false
|
|
|
}
|
|
|
if offset == 0 {
|
|
|
switch whence {
|
|
|
case io.SeekStart:
|
|
|
return 0, nil
|
|
|
case io.SeekEnd:
|
|
|
return instance.status.Size, nil
|
|
|
}
|
|
|
}
|
|
|
return 0, errors.New("未实现")
|
|
|
|
|
|
}
|
|
|
|
|
|
// BlackHole 将客户端发来的数据放入黑洞
|
|
|
func BlackHole(r io.Reader) {
|
|
|
if !model.IsTrueVal(model.GetSettingByName("reset_after_upload_failed")) {
|
|
|
_, err := io.Copy(ioutil.Discard, r)
|
|
|
if err != nil {
|
|
|
util.Log().Debug("黑洞数据出错，%s", err)
|
|
|
}
|
|
|
}
|
|
|
}
|
