seaweedfs/weed/operation/upload_content.go

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package operation
import (
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"bytes"
"compress/flate"
"compress/gzip"
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"encoding/json"
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"errors"
"fmt"
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"io"
"io/ioutil"
"mime"
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"mime/multipart"
"net/http"
"net/textproto"
"path/filepath"
"strings"
"github.com/chrislusf/seaweedfs/weed/glog"
"github.com/chrislusf/seaweedfs/weed/security"
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)
type UploadResult struct {
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Name string `json:"name,omitempty"`
Size uint32 `json:"size,omitempty"`
Error string `json:"error,omitempty"`
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ETag string `json:"eTag,omitempty"`
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}
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var (
client *http.Client
)
func init() {
client = &http.Client{Transport: &http.Transport{
MaxIdleConnsPerHost: 1024,
}}
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}
var fileNameEscaper = strings.NewReplacer("\\", "\\\\", "\"", "\\\"")
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// Upload sends a POST request to a volume server to upload the content
func Upload(uploadUrl string, filename string, reader io.Reader, isGzipped bool, mtype string, pairMap map[string]string, jwt security.EncodedJwt) (*UploadResult, error) {
contentIsGzipped := isGzipped
shouldGzipNow := false
if !isGzipped {
if shouldBeZipped, iAmSure := IsGzippableFileType(filepath.Base(filename), mtype); iAmSure && shouldBeZipped {
shouldGzipNow = true
contentIsGzipped = true
}
}
return upload_content(uploadUrl, func(w io.Writer) (err error) {
if shouldGzipNow {
gzWriter, _ := gzip.NewWriterLevel(w, flate.BestSpeed)
_, err = io.Copy(gzWriter, reader)
gzWriter.Close()
} else {
_, err = io.Copy(w, reader)
}
return
}, filename, contentIsGzipped, mtype, pairMap, jwt)
}
func upload_content(uploadUrl string, fillBufferFunction func(w io.Writer) error, filename string, isGzipped bool, mtype string, pairMap map[string]string, jwt security.EncodedJwt) (*UploadResult, error) {
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body_buf := bytes.NewBufferString("")
body_writer := multipart.NewWriter(body_buf)
h := make(textproto.MIMEHeader)
h.Set("Content-Disposition", fmt.Sprintf(`form-data; name="file"; filename="%s"`, fileNameEscaper.Replace(filename)))
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if mtype == "" {
mtype = mime.TypeByExtension(strings.ToLower(filepath.Ext(filename)))
}
if mtype != "" {
h.Set("Content-Type", mtype)
}
if isGzipped {
h.Set("Content-Encoding", "gzip")
}
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file_writer, cp_err := body_writer.CreatePart(h)
if cp_err != nil {
glog.V(0).Infoln("error creating form file", cp_err.Error())
return nil, cp_err
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}
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if err := fillBufferFunction(file_writer); err != nil {
glog.V(0).Infoln("error copying data", err)
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return nil, err
}
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content_type := body_writer.FormDataContentType()
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if err := body_writer.Close(); err != nil {
glog.V(0).Infoln("error closing body", err)
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return nil, err
}
req, postErr := http.NewRequest("POST", uploadUrl, body_buf)
if postErr != nil {
glog.V(0).Infoln("failing to upload to", uploadUrl, postErr.Error())
return nil, postErr
}
req.Header.Set("Content-Type", content_type)
for k, v := range pairMap {
req.Header.Set(k, v)
}
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if jwt != "" {
req.Header.Set("Authorization", "BEARER "+string(jwt))
}
resp, post_err := client.Do(req)
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if post_err != nil {
glog.V(0).Infoln("failing to upload to", uploadUrl, post_err.Error())
return nil, post_err
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}
defer resp.Body.Close()
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etag := getEtag(resp)
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resp_body, ra_err := ioutil.ReadAll(resp.Body)
if ra_err != nil {
return nil, ra_err
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}
var ret UploadResult
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unmarshal_err := json.Unmarshal(resp_body, &ret)
if unmarshal_err != nil {
glog.V(0).Infoln("failing to read upload response", uploadUrl, string(resp_body))
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return nil, unmarshal_err
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}
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if ret.Error != "" {
return nil, errors.New(ret.Error)
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}
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ret.ETag = etag
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return &ret, nil
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}
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func getEtag(r *http.Response) (etag string) {
etag = r.Header.Get("ETag")
if strings.HasPrefix(etag, "\"") && strings.HasSuffix(etag, "\"") {
etag = etag[1 : len(etag)-1]
}
return
}