mirror of
https://github.com/seaweedfs/seaweedfs.git
synced 2024-01-19 02:48:24 +00:00
261 lines
6.5 KiB
Go
261 lines
6.5 KiB
Go
package storage
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import (
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"encoding/json"
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"fmt"
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"io/ioutil"
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"mime"
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"net/http"
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"path"
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"strconv"
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"strings"
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"time"
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"github.com/chrislusf/seaweedfs/weed/glog"
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"github.com/chrislusf/seaweedfs/weed/images"
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"github.com/chrislusf/seaweedfs/weed/operation"
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. "github.com/chrislusf/seaweedfs/weed/storage/types"
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)
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const (
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NeedleChecksumSize = 4
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PairNamePrefix = "Seaweed-"
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)
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/*
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* A Needle means a uploaded and stored file.
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* Needle file size is limited to 4GB for now.
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*/
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type Needle struct {
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Cookie Cookie `comment:"random number to mitigate brute force lookups"`
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Id NeedleId `comment:"needle id"`
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Size uint32 `comment:"sum of DataSize,Data,NameSize,Name,MimeSize,Mime"`
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DataSize uint32 `comment:"Data size"` //version2
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Data []byte `comment:"The actual file data"`
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Flags byte `comment:"boolean flags"` //version2
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NameSize uint8 //version2
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Name []byte `comment:"maximum 256 characters"` //version2
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MimeSize uint8 //version2
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Mime []byte `comment:"maximum 256 characters"` //version2
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PairsSize uint16 //version2
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Pairs []byte `comment:"additional name value pairs, json format, maximum 64kB"`
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LastModified uint64 //only store LastModifiedBytesLength bytes, which is 5 bytes to disk
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Ttl *TTL
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Checksum CRC `comment:"CRC32 to check integrity"`
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Padding []byte `comment:"Aligned to 8 bytes"`
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}
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func (n *Needle) String() (str string) {
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str = fmt.Sprintf("Cookie:%d, Id:%d, Size:%d, DataSize:%d, Name: %s, Mime: %s", n.Cookie, n.Id, n.Size, n.DataSize, n.Name, n.Mime)
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return
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}
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func ParseUpload(r *http.Request) (
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fileName string, data []byte, mimeType string, pairMap map[string]string, isGzipped bool,
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modifiedTime uint64, ttl *TTL, isChunkedFile bool, e error) {
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pairMap = make(map[string]string)
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for k, v := range r.Header {
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if len(v) > 0 && strings.HasPrefix(k, PairNamePrefix) {
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pairMap[k] = v[0]
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}
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}
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form, fe := r.MultipartReader()
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if fe != nil {
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glog.V(0).Infoln("MultipartReader [ERROR]", fe)
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e = fe
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return
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}
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//first multi-part item
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part, fe := form.NextPart()
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if fe != nil {
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glog.V(0).Infoln("Reading Multi part [ERROR]", fe)
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e = fe
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return
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}
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fileName = part.FileName()
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if fileName != "" {
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fileName = path.Base(fileName)
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}
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data, e = ioutil.ReadAll(part)
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if e != nil {
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glog.V(0).Infoln("Reading Content [ERROR]", e)
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return
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}
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//if the filename is empty string, do a search on the other multi-part items
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for fileName == "" {
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part2, fe := form.NextPart()
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if fe != nil {
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break // no more or on error, just safely break
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}
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fName := part2.FileName()
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//found the first <file type> multi-part has filename
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if fName != "" {
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data2, fe2 := ioutil.ReadAll(part2)
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if fe2 != nil {
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glog.V(0).Infoln("Reading Content [ERROR]", fe2)
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e = fe2
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return
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}
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//update
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data = data2
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fileName = path.Base(fName)
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break
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}
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}
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isChunkedFile, _ = strconv.ParseBool(r.FormValue("cm"))
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if !isChunkedFile {
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dotIndex := strings.LastIndex(fileName, ".")
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ext, mtype := "", ""
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if dotIndex > 0 {
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ext = strings.ToLower(fileName[dotIndex:])
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mtype = mime.TypeByExtension(ext)
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}
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contentType := part.Header.Get("Content-Type")
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if contentType != "" && mtype != contentType {
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mimeType = contentType //only return mime type if not deductable
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mtype = contentType
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}
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if part.Header.Get("Content-Encoding") == "gzip" {
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isGzipped = true
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} else if operation.IsGzippable(ext, mtype) {
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if data, e = operation.GzipData(data); e != nil {
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return
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}
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isGzipped = true
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}
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if ext == ".gz" {
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if strings.HasSuffix(fileName, ".css.gz") ||
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strings.HasSuffix(fileName, ".html.gz") ||
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strings.HasSuffix(fileName, ".txt.gz") ||
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strings.HasSuffix(fileName, ".js.gz") {
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fileName = fileName[:len(fileName)-3]
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isGzipped = true
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}
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}
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}
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modifiedTime, _ = strconv.ParseUint(r.FormValue("ts"), 10, 64)
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ttl, _ = ReadTTL(r.FormValue("ttl"))
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return
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}
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func NewNeedle(r *http.Request, fixJpgOrientation bool) (n *Needle, e error) {
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var pairMap map[string]string
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fname, mimeType, isGzipped, isChunkedFile := "", "", false, false
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n = new(Needle)
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fname, n.Data, mimeType, pairMap, isGzipped, n.LastModified, n.Ttl, isChunkedFile, e = ParseUpload(r)
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if e != nil {
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return
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}
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if len(fname) < 256 {
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n.Name = []byte(fname)
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n.SetHasName()
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}
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if len(mimeType) < 256 {
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n.Mime = []byte(mimeType)
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n.SetHasMime()
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}
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if len(pairMap) != 0 {
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trimmedPairMap := make(map[string]string)
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for k, v := range pairMap {
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trimmedPairMap[k[len(PairNamePrefix):]] = v
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}
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pairs, _ := json.Marshal(trimmedPairMap)
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if len(pairs) < 65536 {
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n.Pairs = pairs
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n.PairsSize = uint16(len(pairs))
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n.SetHasPairs()
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}
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}
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if isGzipped {
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n.SetGzipped()
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}
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if n.LastModified == 0 {
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n.LastModified = uint64(time.Now().Unix())
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}
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n.SetHasLastModifiedDate()
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if n.Ttl != EMPTY_TTL {
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n.SetHasTtl()
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}
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if isChunkedFile {
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n.SetIsChunkManifest()
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}
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if fixJpgOrientation {
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loweredName := strings.ToLower(fname)
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if mimeType == "image/jpeg" || strings.HasSuffix(loweredName, ".jpg") || strings.HasSuffix(loweredName, ".jpeg") {
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n.Data = images.FixJpgOrientation(n.Data)
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}
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}
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n.Checksum = NewCRC(n.Data)
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commaSep := strings.LastIndex(r.URL.Path, ",")
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dotSep := strings.LastIndex(r.URL.Path, ".")
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fid := r.URL.Path[commaSep+1:]
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if dotSep > 0 {
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fid = r.URL.Path[commaSep+1: dotSep]
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}
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e = n.ParsePath(fid)
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return
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}
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func (n *Needle) ParsePath(fid string) (err error) {
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length := len(fid)
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if length <= CookieSize*2 {
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return fmt.Errorf("Invalid fid: %s", fid)
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}
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delta := ""
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deltaIndex := strings.LastIndex(fid, "_")
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if deltaIndex > 0 {
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fid, delta = fid[0:deltaIndex], fid[deltaIndex+1:]
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}
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n.Id, n.Cookie, err = ParseNeedleIdCookie(fid)
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if err != nil {
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return err
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}
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if delta != "" {
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if d, e := strconv.ParseUint(delta, 10, 64); e == nil {
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n.Id += NeedleId(d)
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} else {
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return e
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}
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}
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return err
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}
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func ParseNeedleIdCookie(key_hash_string string) (NeedleId, Cookie, error) {
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if len(key_hash_string) <= CookieSize*2 {
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return 0, 0, fmt.Errorf("KeyHash is too short.")
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}
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if len(key_hash_string) > (NeedleIdSize+CookieSize)*2 {
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return 0, 0, fmt.Errorf("KeyHash is too long.")
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}
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split := len(key_hash_string) - CookieSize*2
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needleId, err := ParseNeedleId(key_hash_string[:split])
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if err != nil {
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return 0, 0, fmt.Errorf("Parse needleId error: %v", err)
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}
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cookie, err := ParseCookie(key_hash_string[split:])
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if err != nil {
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return 0, 0, fmt.Errorf("Parse cookie error: %v", err)
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}
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return needleId, cookie, nil
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}
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