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package s3api
import (
"encoding/json"
"fmt"
"github.com/chrislusf/seaweedfs/weed/glog"
"github.com/gorilla/mux"
"io"
"io/ioutil"
"net/http"
)
var (
client *http.Client
)
func init() {
client = &http.Client{Transport: &http.Transport{
MaxIdleConnsPerHost: 1024,
}}
}
type UploadResult struct {
Name string `json:"name,omitempty"`
Size uint32 `json:"size,omitempty"`
Error string `json:"error,omitempty"`
}
func (s3a *S3ApiServer) PutObjectHandler(w http.ResponseWriter, r *http.Request) {
// http://docs.aws.amazon.com/AmazonS3/latest/dev/UploadingObjects.html
vars := mux.Vars(r)
bucket := vars["bucket"]
object := vars["object"]
_, err := validateContentMd5(r.Header)
if err != nil {
writeErrorResponse(w, ErrInvalidDigest, r.URL)
return
}
uploadUrl := fmt.Sprintf("http://%s%s/%s/%s?collection=%s",
s3a.option.Filer, s3a.option.BucketsPath, bucket, object, bucket)
proxyReq, err := http.NewRequest("PUT", uploadUrl, r.Body)
if err != nil {
glog.Errorf("NewRequest %s: %v", uploadUrl, err)
writeErrorResponse(w, ErrInternalError, r.URL)
return
}
proxyReq.Header.Set("Host", s3a.option.Filer)
proxyReq.Header.Set("X-Forwarded-For", r.RemoteAddr)
for header, values := range r.Header {
for _, value := range values {
proxyReq.Header.Add(header, value)
}
}
resp, postErr := client.Do(proxyReq)
if postErr != nil {
glog.Errorf("post to filer: %v", postErr)
writeErrorResponse(w, ErrInternalError, r.URL)
return
}
defer resp.Body.Close()
resp_body, ra_err := ioutil.ReadAll(resp.Body)
if ra_err != nil {
glog.Errorf("upload to filer response read: %v", ra_err)
writeErrorResponse(w, ErrInternalError, r.URL)
return
}
var ret UploadResult
unmarshal_err := json.Unmarshal(resp_body, &ret)
if unmarshal_err != nil {
glog.Errorf("failing to read upload to %s : %v", uploadUrl, string(resp_body))
writeErrorResponse(w, ErrInternalError, r.URL)
return
}
if ret.Error != "" {
glog.Errorf("upload to filer error: %v", ret.Error)
writeErrorResponse(w, ErrInternalError, r.URL)
return
}
writeSuccessResponseEmpty(w)
}
func (s3a *S3ApiServer) GetObjectHandler(w http.ResponseWriter, r *http.Request) {
destUrl := fmt.Sprintf("http://%s%s%s",
s3a.option.Filer, s3a.option.BucketsPath, r.RequestURI)
s3a.proxyToFiler(w, r, destUrl, passThroghResponse)
}
func (s3a *S3ApiServer) HeadObjectHandler(w http.ResponseWriter, r *http.Request) {
destUrl := fmt.Sprintf("http://%s%s%s",
s3a.option.Filer, s3a.option.BucketsPath, r.RequestURI)
s3a.proxyToFiler(w, r, destUrl, passThroghResponse)
}
func (s3a *S3ApiServer) DeleteObjectHandler(w http.ResponseWriter, r *http.Request) {
destUrl := fmt.Sprintf("http://%s%s%s",
s3a.option.Filer, s3a.option.BucketsPath, r.RequestURI)
s3a.proxyToFiler(w, r, destUrl, func(proxyResonse *http.Response, w http.ResponseWriter) {
for k, v := range proxyResonse.Header {
w.Header()[k] = v
}
w.WriteHeader(http.StatusNoContent)
})
}
func (s3a *S3ApiServer) proxyToFiler(w http.ResponseWriter, r *http.Request, destUrl string, responseFn func(proxyResonse *http.Response, w http.ResponseWriter)) {
glog.V(2).Infof("s3 proxying %s to %s", r.Method, destUrl)
proxyReq, err := http.NewRequest(r.Method, destUrl, r.Body)
if err != nil {
glog.Errorf("NewRequest %s: %v", destUrl, err)
writeErrorResponse(w, ErrInternalError, r.URL)
return
}
proxyReq.Header.Set("Host", s3a.option.Filer)
proxyReq.Header.Set("X-Forwarded-For", r.RemoteAddr)
for header, values := range r.Header {
for _, value := range values {
proxyReq.Header.Add(header, value)
}
}
resp, postErr := client.Do(proxyReq)
if postErr != nil {
glog.Errorf("post to filer: %v", postErr)
writeErrorResponse(w, ErrInternalError, r.URL)
return
}
defer resp.Body.Close()
responseFn(resp, w)
}
func passThroghResponse(proxyResonse *http.Response, w http.ResponseWriter) {
for k, v := range proxyResonse.Header {
w.Header()[k] = v
}
w.WriteHeader(proxyResonse.StatusCode)
io.Copy(w, proxyResonse.Body)
}
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