refactoring: go fmt, reorg

weed/server/filer_server_handlers_write_monopart.go

@@ -5,13 +5,56 @@ import (
 	"crypto/md5"
 	"encoding/base64"
 	"fmt"
+	"io"
 	"io/ioutil"
+	"mime/multipart"
 	"net/http"
+	"net/textproto"
 	"strings"
 
 	"github.com/chrislusf/seaweedfs/weed/glog"
 )
 
+var quoteEscaper = strings.NewReplacer("\\", "\\\\", `"`, "\\\"")
+
+func escapeQuotes(s string) string {
+	return quoteEscaper.Replace(s)
+}
+
+func createFormFile(writer *multipart.Writer, fieldname, filename, mime string) (io.Writer, error) {
+	h := make(textproto.MIMEHeader)
+	h.Set("Content-Disposition",
+		fmt.Sprintf(`form-data; name="%s"; filename="%s"`,
+			escapeQuotes(fieldname), escapeQuotes(filename)))
+	if len(mime) == 0 {
+		mime = "application/octet-stream"
+	}
+	h.Set("Content-Type", mime)
+	return writer.CreatePart(h)
+}
+
+func makeFormData(filename, mimeType string, content io.Reader) (formData io.Reader, contentType string, err error) {
+	buf := new(bytes.Buffer)
+	writer := multipart.NewWriter(buf)
+	defer writer.Close()
+
+	part, err := createFormFile(writer, "file", filename, mimeType)
+	if err != nil {
+		glog.V(0).Infoln(err)
+		return
+	}
+	_, err = io.Copy(part, content)
+	if err != nil {
+		glog.V(0).Infoln(err)
+		return
+	}
+
+	formData = buf
+	contentType = writer.FormDataContentType()
+
+	return
+}
+
 func checkContentMD5(w http.ResponseWriter, r *http.Request) (err error) {
 	if contentMD5 := r.Header.Get("Content-MD5"); contentMD5 != "" {
 		buf, _ := ioutil.ReadAll(r.Body)
@@ -65,3 +108,32 @@ func (fs *FilerServer) monolithicUploadAnalyzer(w http.ResponseWriter, r *http.R
 	}
 	return
 }
+
+func multipartHttpBodyBuilder(w http.ResponseWriter, r *http.Request, fileName string) (err error) {
+	body, contentType, te := makeFormData(fileName, r.Header.Get("Content-Type"), r.Body)
+	if te != nil {
+		glog.V(0).Infoln("S3 protocol to raw seaweed protocol failed", te.Error())
+		writeJsonError(w, r, http.StatusInternalServerError, te)
+		err = te
+		return
+	}
+
+	if body != nil {
+		switch v := body.(type) {
+		case *bytes.Buffer:
+			r.ContentLength = int64(v.Len())
+		case *bytes.Reader:
+			r.ContentLength = int64(v.Len())
+		case *strings.Reader:
+			r.ContentLength = int64(v.Len())
+		}
+	}
+
+	r.Header.Set("Content-Type", contentType)
+	rc, ok := body.(io.ReadCloser)
+	if !ok && body != nil {
+		rc = ioutil.NopCloser(body)
+	}
+	r.Body = rc
+	return
+}