refactoring: split into 4 files

weed/server/filer_server_handlers_write_monopart.go

@@ -0,0 +1,67 @@
+package weed_server
+
+import (
+	"bytes"
+	"crypto/md5"
+	"encoding/base64"
+	"fmt"
+	"io/ioutil"
+	"net/http"
+	"strings"
+
+	"github.com/chrislusf/seaweedfs/weed/glog"
+)
+
+func checkContentMD5(w http.ResponseWriter, r *http.Request) (err error) {
+	if contentMD5 := r.Header.Get("Content-MD5"); contentMD5 != "" {
+		buf, _ := ioutil.ReadAll(r.Body)
+		//checkMD5
+		sum := md5.Sum(buf)
+		fileDataMD5 := base64.StdEncoding.EncodeToString(sum[0:len(sum)])
+		if strings.ToLower(fileDataMD5) != strings.ToLower(contentMD5) {
+			glog.V(0).Infof("fileDataMD5 [%s] is not equal to Content-MD5 [%s]", fileDataMD5, contentMD5)
+			err = fmt.Errorf("MD5 check failed")
+			writeJsonError(w, r, http.StatusNotAcceptable, err)
+			return
+		}
+		//reconstruct http request body for following new request to volume server
+		r.Body = ioutil.NopCloser(bytes.NewBuffer(buf))
+	}
+	return
+}
+
+func (fs *FilerServer) monolithicUploadAnalyzer(w http.ResponseWriter, r *http.Request, replication, collection string) (fileId, urlLocation string, err error) {
+	/*
+		Amazon S3 ref link:[http://docs.aws.amazon.com/AmazonS3/latest/API/Welcome.html]
+		There is a long way to provide a completely compatibility against all Amazon S3 API, I just made
+		a simple data stream adapter between S3 PUT API and seaweedfs's volume storage Write API
+		1. The request url format should be http://$host:$port/$bucketName/$objectName
+		2. bucketName will be mapped to seaweedfs's collection name
+		3. You could customize and make your enhancement.
+	*/
+	lastPos := strings.LastIndex(r.URL.Path, "/")
+	if lastPos == -1 || lastPos == 0 || lastPos == len(r.URL.Path)-1 {
+		glog.V(0).Infoln("URL Path [%s] is invalid, could not retrieve file name", r.URL.Path)
+		err = fmt.Errorf("URL Path is invalid")
+		writeJsonError(w, r, http.StatusInternalServerError, err)
+		return
+	}
+
+	if err = checkContentMD5(w, r); err != nil {
+		return
+	}
+
+	fileName := r.URL.Path[lastPos+1:]
+	if err = multipartHttpBodyBuilder(w, r, fileName); err != nil {
+		return
+	}
+
+	secondPos := strings.Index(r.URL.Path[1:], "/") + 1
+	collection = r.URL.Path[1:secondPos]
+	path := r.URL.Path
+
+	if fileId, urlLocation, err = fs.queryFileInfoByPath(w, r, path); err == nil && fileId == "" {
+		fileId, urlLocation, err = fs.assignNewFileInfo(w, r, replication, collection)
+	}
+	return
+}