func handleVerify(conn http.ResponseWriter, req *http.Request) {
if !(req.Method == "POST" && req.URL.Path == "/camli/sig/verify") {
httputil.BadRequestError(conn, "Inconfigured handler.")
return
}
req.ParseForm()
sjson := req.FormValue("sjson")
if sjson == "" {
httputil.BadRequestError(conn, "Missing sjson parameter.")
return
}
m := make(map[string]interface{})
vreq := jsonsign.NewVerificationRequest(sjson, pubKeyFetcher)
if vreq.Verify() {
m["signatureValid"] = 1
m["verifiedData"] = vreq.PayloadMap
} else {
errStr := vreq.Err.String()
m["signatureValid"] = 0
m["errorMessage"] = errStr
}
conn.WriteHeader(http.StatusOK) // no HTTP response code fun, error info in JSON
httputil.ReturnJson(conn, m)
}
func handleTestForm(conn http.ResponseWriter, req *http.Request) {
if !(req.Method == "POST" && req.URL.Path == "/camli/testform") {
httputil.BadRequestError(conn, "Inconfigured handler.")
return
}
multipart, err := req.MultipartReader()
if multipart == nil {
httputil.BadRequestError(conn, fmt.Sprintf("Expected multipart/form-data POST request; %v", err))
return
}
for {
part, err := multipart.NextPart()
if err != nil {
fmt.Println("Error reading:", err)
break
}
if part == nil {
break
}
formName := part.FormName()
fmt.Printf("New value [%s], part=%v\n", formName, part)
sha1 := sha1.New()
io.Copy(sha1, part)
fmt.Printf("Got part digest: %x\n", sha1.Sum())
}
fmt.Println("Done reading multipart body.")
}
func handleRemove(conn http.ResponseWriter, req *http.Request, storage blobserver.Storage) {
if w, ok := storage.(blobserver.ContextWrapper); ok {
storage = w.WrapContext(req)
}
if req.Method != "POST" {
log.Fatalf("Invalid method; handlers misconfigured")
}
configer, ok := storage.(blobserver.Configer)
if !ok {
conn.WriteHeader(http.StatusForbidden)
fmt.Fprintf(conn, "Remove handler's blobserver.Storage isn't a blobserver.Configuer; can't remove")
return
}
if !configer.Config().IsQueue {
conn.WriteHeader(http.StatusForbidden)
fmt.Fprintf(conn, "Can only remove blobs from a queue.\n")
return
}
n := 0
toRemove := make([]*blobref.BlobRef, 0)
toRemoveStr := make([]string, 0)
for {
n++
if n > maxRemovesPerRequest {
httputil.BadRequestError(conn,
fmt.Sprintf("Too many removes in this request; max is %d", maxRemovesPerRequest))
return
}
key := fmt.Sprintf("blob%v", n)
value := req.FormValue(key)
if value == "" {
break
}
ref := blobref.Parse(value)
if ref == nil {
httputil.BadRequestError(conn, "Bogus blobref for key "+key)
return
}
toRemove = append(toRemove, ref)
toRemoveStr = append(toRemoveStr, ref.String())
}
err := storage.RemoveBlobs(toRemove)
if err != nil {
conn.WriteHeader(http.StatusInternalServerError)
log.Printf("Server error during remove: %v", err)
fmt.Fprintf(conn, "Server error")
return
}
reply := make(map[string]interface{}, 0)
reply["removed"] = toRemoveStr
httputil.ReturnJson(conn, reply)
}
func handleCamli(conn http.ResponseWriter, req *http.Request) {
handler := func(conn http.ResponseWriter, req *http.Request) {
httputil.BadRequestError(conn,
fmt.Sprintf("Unsupported path (%s) or method (%s).",
req.URL.Path, req.Method))
}
if *flagRequestLog {
log.Printf("%s %s", req.Method, req.RawURL)
}
switch req.Method {
case "GET":
switch req.URL.Path {
case "/camli/enumerate-blobs":
handler = auth.RequireAuth(handleEnumerateBlobs)
default:
handler = createGetHandler(blobFetcher)
}
case "POST":
switch req.URL.Path {
case "/camli/preupload":
handler = auth.RequireAuth(handlePreUpload)
case "/camli/upload":
handler = auth.RequireAuth(handleMultiPartUpload)
case "/camli/testform": // debug only
handler = handleTestForm
case "/camli/form": // debug only
handler = handleCamliForm
}
case "PUT": // no longer part of spec
handler = auth.RequireAuth(handlePut)
}
handler(conn, req)
}
func handlePut(conn http.ResponseWriter, req *http.Request) {
blobRef := BlobFromUrlPath(req.URL.Path)
if blobRef == nil {
httputil.BadRequestError(conn, "Malformed PUT URL.")
return
}
if !blobRef.IsSupported() {
httputil.BadRequestError(conn, "unsupported object hash function")
return
}
_, err := receiveBlob(blobRef, req.Body)
if err != nil {
httputil.ServerError(conn, err)
return
}
fmt.Fprint(conn, "OK")
}
func handlePut(conn http.ResponseWriter, req *http.Request, blobReceiver blobserver.BlobReceiver) {
if w, ok := blobReceiver.(blobserver.ContextWrapper); ok {
blobReceiver = w.WrapContext(req)
}
blobRef := blobref.FromPattern(kPutPattern, req.URL.Path)
if blobRef == nil {
httputil.BadRequestError(conn, "Malformed PUT URL.")
return
}
if !blobRef.IsSupported() {
httputil.BadRequestError(conn, "unsupported object hash function")
return
}
_, err := blobReceiver.ReceiveBlob(blobRef, req.Body)
if err != nil {
httputil.ServerError(conn, err)
return
}
fmt.Fprint(conn, "OK")
}
func handleCamliSig(conn http.ResponseWriter, req *http.Request) {
handler := func(conn http.ResponseWriter, req *http.Request) {
httputil.BadRequestError(conn, "Unsupported path or method.")
}
switch req.Method {
case "POST":
switch req.URL.Path {
case "/camli/sig/sign":
handler = auth.RequireAuth(handleSign)
case "/camli/sig/verify":
handler = handleVerify
}
}
handler(conn, req)
}
func handleStat(conn http.ResponseWriter, req *http.Request, storage blobserver.BlobStatter) {
if w, ok := storage.(blobserver.ContextWrapper); ok {
storage = w.WrapContext(req)
}
toStat := make([]*blobref.BlobRef, 0)
switch req.Method {
case "POST":
fallthrough
case "GET":
camliVersion := req.FormValue("camliversion")
if camliVersion == "" {
httputil.BadRequestError(conn, "No camliversion")
return
}
n := 0
for {
n++
key := fmt.Sprintf("blob%v", n)
value := req.FormValue(key)
if value == "" {
n--
break
}
if n > maxStatBlobs {
httputil.BadRequestError(conn, "Too many stat blob checks")
return
}
ref := blobref.Parse(value)
if ref == nil {
httputil.BadRequestError(conn, "Bogus blobref for key "+key)
return
}
toStat = append(toStat, ref)
}
default:
httputil.BadRequestError(conn, "Invalid method.")
return
}
waitSeconds := 0
if waitStr := req.FormValue("maxwaitsec"); waitStr != "" {
waitSeconds, _ = strconv.Atoi(waitStr)
switch {
case waitSeconds < 0:
waitSeconds = 0
case waitSeconds > 30:
// TODO: don't hard-code 30. push this up into a blobserver interface
// for getting the configuration of the server (ultimately a flag in
// in the binary)
waitSeconds = 30
}
}
statRes := make([]map[string]interface{}, 0)
if len(toStat) > 0 {
blobch := make(chan blobref.SizedBlobRef)
resultch := make(chan os.Error, 1)
go func() {
err := storage.StatBlobs(blobch, toStat, waitSeconds)
close(blobch)
resultch <- err
}()
for sb := range blobch {
ah := make(map[string]interface{})
ah["blobRef"] = sb.BlobRef.String()
ah["size"] = sb.Size
statRes = append(statRes, ah)
}
err := <-resultch
if err != nil {
log.Printf("Stat error: %v", err)
conn.WriteHeader(http.StatusInternalServerError)
return
}
}
configer, _ := storage.(blobserver.Configer)
ret := commonUploadResponse(configer, req)
ret["stat"] = statRes
ret["canLongPoll"] = true
httputil.ReturnJson(conn, ret)
}
func unsupportedHandler(conn http.ResponseWriter, req *http.Request) {
httputil.BadRequestError(conn, "Unsupported camlistore path or method.")
}
func handleMultiPartUpload(conn http.ResponseWriter, req *http.Request, blobReceiver blobserver.BlobReceiveConfiger) {
if w, ok := blobReceiver.(blobserver.ContextWrapper); ok {
blobReceiver = w.WrapContext(req).(blobserver.BlobReceiveConfiger)
}
if !(req.Method == "POST" && strings.Contains(req.URL.Path, "/camli/upload")) {
log.Printf("Inconfigured handler upload handler")
httputil.BadRequestError(conn, "Inconfigured handler.")
return
}
receivedBlobs := make([]blobref.SizedBlobRef, 0, 10)
multipart, err := req.MultipartReader()
if multipart == nil {
httputil.BadRequestError(conn, fmt.Sprintf(
"Expected multipart/form-data POST request; %v", err))
return
}
var errText string
addError := func(s string) {
log.Printf("Client error: %s", s)
if errText == "" {
errText = s
return
}
errText = errText + "\n" + s
}
for {
mimePart, err := multipart.NextPart()
if err == os.EOF {
break
}
if err != nil {
addError(fmt.Sprintf("Error reading multipart section: %v", err))
break
}
//POST-r60:
//contentDisposition, params, err := mime.ParseMediaType(mimePart.Header.Get("Content-Disposition"))
//if err != nil {
// addError(err.String())
// break
//}
// r60:
contentDisposition, params := mime.ParseMediaType(mimePart.Header.Get("Content-Disposition"))
if contentDisposition == "" {
addError("invalid Content-Disposition")
break
}
if contentDisposition != "form-data" {
addError(fmt.Sprintf("Expected Content-Disposition of \"form-data\"; got %q", contentDisposition))
break
}
formName := params["name"]
ref := blobref.Parse(formName)
if ref == nil {
addError(fmt.Sprintf("Ignoring form key %q", formName))
continue
}
if oldAppEngineHappySpec {
_, hasContentType := mimePart.Header["Content-Type"]
if !hasContentType {
addError(fmt.Sprintf("Expected Content-Type header for blobref %s; see spec", ref))
continue
}
_, hasFileName := params["filename"]
if !hasFileName {
addError(fmt.Sprintf("Expected 'filename' Content-Disposition parameter for blobref %s; see spec", ref))
continue
}
}
blobGot, err := blobReceiver.ReceiveBlob(ref, mimePart)
if err != nil {
addError(fmt.Sprintf("Error receiving blob %v: %v\n", ref, err))
break
}
log.Printf("Received blob %v\n", blobGot)
receivedBlobs = append(receivedBlobs, blobGot)
}
log.Println("Done reading multipart body.")
ret := commonUploadResponse(blobReceiver, req)
received := make([]map[string]interface{}, 0)
for _, got := range receivedBlobs {
log.Printf("Got blob: %v\n", got)
blob := make(map[string]interface{})
blob["blobRef"] = got.BlobRef.String()
blob["size"] = got.Size
received = append(received, blob)
}
ret["received"] = received
if errText != "" {
ret["errorText"] = errText
}
httputil.ReturnJson(conn, ret)
}
func handleMultiPartUpload(conn http.ResponseWriter, req *http.Request) {
if !(req.Method == "POST" && req.URL.Path == "/camli/upload") {
httputil.BadRequestError(conn, "Inconfigured handler.")
return
}
receivedBlobs := make([]*receivedBlob, 0, 10)
multipart, err := req.MultipartReader()
if multipart == nil {
httputil.BadRequestError(conn, fmt.Sprintf(
"Expected multipart/form-data POST request; %v", err))
return
}
var errText string
addError := func(s string) {
log.Printf("Client error: %s", s)
if errText == "" {
errText = s
return
}
errText = errText + "\n" + s
}
for {
part, err := multipart.NextPart()
if err != nil {
addError(fmt.Sprintf("Error reading multipart section: %v", err))
break
}
if part == nil {
break
}
contentDisposition, params := mime.ParseMediaType(part.Header["Content-Disposition"])
if contentDisposition != "form-data" {
addError(fmt.Sprintf("Expected Content-Disposition of \"form-data\"; got %q", contentDisposition))
break
}
formName := params["name"]
ref := blobref.Parse(formName)
if ref == nil {
addError(fmt.Sprintf("Ignoring form key %q", formName))
continue
}
_, hasContentType := part.Header["Content-Type"]
if !hasContentType {
addError(fmt.Sprintf("Expected Content-Type header for blobref %s; see spec", ref))
continue
}
_, hasFileName := params["filename"]
if !hasFileName {
addError(fmt.Sprintf("Expected 'filename' Content-Disposition parameter for blobref %s; see spec", ref))
continue
}
blobGot, err := receiveBlob(ref, part)
if err != nil {
addError(fmt.Sprintf("Error receiving blob %v: %v\n", ref, err))
break
}
log.Printf("Received blob %v\n", blobGot)
receivedBlobs = append(receivedBlobs, blobGot)
}
log.Println("Done reading multipart body.")
ret := commonUploadResponse(req)
received := make([]map[string]interface{}, 0)
for _, got := range receivedBlobs {
log.Printf("Got blob: %v\n", got)
blob := make(map[string]interface{})
blob["blobRef"] = got.blobRef.String()
blob["size"] = got.size
received = append(received, blob)
}
ret["received"] = received
if errText != "" {
ret["errorText"] = errText
}
httputil.ReturnJson(conn, ret)
}
// Unauthenticated user. Be paranoid.
func handleGetViaSharing(conn http.ResponseWriter, req *http.Request,
blobRef *blobref.BlobRef, fetcher blobref.StreamingFetcher) {
if w, ok := fetcher.(blobserver.ContextWrapper); ok {
fetcher = w.WrapContext(req)
}
viaPathOkay := false
startTime := time.Nanoseconds()
defer func() {
if !viaPathOkay {
// Insert a delay, to hide timing attacks probing
// for the existence of blobs.
sleep := fetchFailureDelayNs - (time.Nanoseconds() - startTime)
if sleep > 0 {
time.Sleep(sleep)
}
}
}()
viaBlobs := make([]*blobref.BlobRef, 0)
if via := req.FormValue("via"); via != "" {
for _, vs := range strings.Split(via, ",") {
if br := blobref.Parse(vs); br == nil {
httputil.BadRequestError(conn, "Malformed blobref in via param")
return
} else {
viaBlobs = append(viaBlobs, br)
}
}
}
fetchChain := make([]*blobref.BlobRef, 0)
fetchChain = append(fetchChain, viaBlobs...)
fetchChain = append(fetchChain, blobRef)
for i, br := range fetchChain {
switch i {
case 0:
file, size, err := fetcher.FetchStreaming(br)
if err != nil {
log.Printf("Fetch chain 0 of %s failed: %v", br.String(), err)
auth.SendUnauthorized(conn)
return
}
defer file.Close()
if size > maxJsonSize {
log.Printf("Fetch chain 0 of %s too large", br.String())
auth.SendUnauthorized(conn)
return
}
jd := json.NewDecoder(file)
m := make(map[string]interface{})
if err := jd.Decode(&m); err != nil {
log.Printf("Fetch chain 0 of %s wasn't JSON: %v", br.String(), err)
auth.SendUnauthorized(conn)
return
}
if m["camliType"].(string) != "share" {
log.Printf("Fetch chain 0 of %s wasn't a share", br.String())
auth.SendUnauthorized(conn)
return
}
if len(fetchChain) > 1 && fetchChain[1].String() != m["target"].(string) {
log.Printf("Fetch chain 0->1 (%s -> %q) unauthorized, expected hop to %q",
br.String(), fetchChain[1].String(), m["target"])
auth.SendUnauthorized(conn)
return
}
case len(fetchChain) - 1:
// Last one is fine (as long as its path up to here has been proven, and it's
// not the first thing in the chain)
continue
default:
file, _, err := fetcher.FetchStreaming(br)
if err != nil {
log.Printf("Fetch chain %d of %s failed: %v", i, br.String(), err)
auth.SendUnauthorized(conn)
return
}
defer file.Close()
lr := io.LimitReader(file, maxJsonSize)
slurpBytes, err := ioutil.ReadAll(lr)
if err != nil {
log.Printf("Fetch chain %d of %s failed in slurp: %v", i, br.String(), err)
auth.SendUnauthorized(conn)
return
}
saught := fetchChain[i+1].String()
if bytes.IndexAny(slurpBytes, saught) == -1 {
log.Printf("Fetch chain %d of %s failed; no reference to %s",
i, br.String(), saught)
auth.SendUnauthorized(conn)
return
}
}
}
viaPathOkay = true
serveBlobRef(conn, req, blobRef, fetcher)
}
func handleGet(conn http.ResponseWriter, req *http.Request, fetcher blobref.Fetcher) {
isOwner := auth.IsAuthorized(req)
blobRef := BlobFromUrlPath(req.URL.Path)
if blobRef == nil {
httputil.BadRequestError(conn, "Malformed GET URL.")
return
}
var viaBlobs []*blobref.BlobRef
if !isOwner {
viaPathOkay := false
startTime := time.Nanoseconds()
defer func() {
if !viaPathOkay {
// Insert a delay, to hide timing attacks probing
// for the existence of blobs.
sleep := fetchFailureDelayNs - (time.Nanoseconds() - startTime)
if sleep > 0 {
time.Sleep(sleep)
}
}
}()
viaBlobs = make([]*blobref.BlobRef, 0)
if via := req.FormValue("via"); via != "" {
for _, vs := range strings.Split(via, ",", -1) {
if br := blobref.Parse(vs); br == nil {
httputil.BadRequestError(conn, "Malformed blobref in via param")
return
} else {
viaBlobs = append(viaBlobs, br)
}
}
}
fetchChain := make([]*blobref.BlobRef, 0)
fetchChain = append(fetchChain, viaBlobs...)
fetchChain = append(fetchChain, blobRef)
for i, br := range fetchChain {
switch i {
case 0:
file, size, err := fetcher.Fetch(br)
if err != nil {
log.Printf("Fetch chain 0 of %s failed: %v", br.String(), err)
sendUnauthorized(conn)
return
}
defer file.Close()
if size > maxJsonSize {
log.Printf("Fetch chain 0 of %s too large", br.String())
sendUnauthorized(conn)
return
}
jd := json.NewDecoder(file)
m := make(map[string]interface{})
if err := jd.Decode(&m); err != nil {
log.Printf("Fetch chain 0 of %s wasn't JSON: %v", br.String(), err)
sendUnauthorized(conn)
return
}
if m["camliType"].(string) != "share" {
log.Printf("Fetch chain 0 of %s wasn't a share", br.String())
sendUnauthorized(conn)
return
}
if len(fetchChain) > 1 && fetchChain[1].String() != m["target"].(string) {
log.Printf("Fetch chain 0->1 (%s -> %q) unauthorized, expected hop to %q",
br.String(), fetchChain[1].String(), m["target"])
sendUnauthorized(conn)
return
}
case len(fetchChain) - 1:
// Last one is fine (as long as its path up to here has been proven, and it's
// not the first thing in the chain)
continue
default:
file, _, err := fetcher.Fetch(br)
if err != nil {
log.Printf("Fetch chain %d of %s failed: %v", i, br.String(), err)
sendUnauthorized(conn)
return
}
defer file.Close()
lr := io.LimitReader(file, maxJsonSize)
slurpBytes, err := ioutil.ReadAll(lr)
if err != nil {
log.Printf("Fetch chain %d of %s failed in slurp: %v", i, br.String(), err)
sendUnauthorized(conn)
return
}
saught := fetchChain[i+1].String()
if bytes.IndexAny(slurpBytes, saught) == -1 {
log.Printf("Fetch chain %d of %s failed; no reference to %s",
i, br.String(), saught)
sendUnauthorized(conn)
return
}
}
}
viaPathOkay = true
}
file, size, err := fetcher.Fetch(blobRef)
switch err {
case nil:
break
case os.ENOENT:
conn.WriteHeader(http.StatusNotFound)
fmt.Fprintf(conn, "Object not found.")
return
default:
httputil.ServerError(conn, err)
return
}
defer file.Close()
reqRange := getRequestedRange(req)
if reqRange.SkipBytes != 0 {
_, err = file.Seek(reqRange.SkipBytes, 0)
if err != nil {
httputil.ServerError(conn, err)
return
}
}
var input io.Reader = file
if reqRange.LimitBytes != -1 {
input = io.LimitReader(file, reqRange.LimitBytes)
}
remainBytes := size - reqRange.SkipBytes
if reqRange.LimitBytes != -1 &&
reqRange.LimitBytes < remainBytes {
remainBytes = reqRange.LimitBytes
}
// Assume this generic content type by default. For better
// demos we'll try to sniff and guess the "right" MIME type in
// certain cases (no Range requests, etc) but this isn't part
// of the Camli spec at all. We just do it to ease demos.
contentType := "application/octet-stream"
if reqRange.IsWholeFile() {
const peekSize = 1024
bufReader, _ := bufio.NewReaderSize(input, peekSize)
header, _ := bufReader.Peek(peekSize)
if len(header) >= 8 {
switch {
case isValidUtf8(string(header)):
contentType = "text/plain; charset=utf-8"
case bytes.HasPrefix(header, []byte{0xff, 0xd8, 0xff, 0xe2}):
contentType = "image/jpeg"
case bytes.HasPrefix(header, []byte{0x89, 0x50, 0x4e, 0x47, 0xd, 0xa, 0x1a, 0xa}):
contentType = "image/png"
}
}
input = bufReader
}
conn.SetHeader("Content-Type", contentType)
if !reqRange.IsWholeFile() {
conn.SetHeader("Content-Range",
fmt.Sprintf("bytes %d-%d/%d", reqRange.SkipBytes,
reqRange.SkipBytes+remainBytes,
size))
conn.WriteHeader(http.StatusPartialContent)
}
bytesCopied, err := io.Copy(conn, input)
// If there's an error at this point, it's too late to tell the client,
// as they've already been receiving bytes. But they should be smart enough
// to verify the digest doesn't match. But we close the (chunked) response anyway,
// to further signal errors.
killConnection := func() {
closer, _, err := conn.Hijack()
if err != nil {
closer.Close()
}
}
if err != nil {
fmt.Fprintf(os.Stderr, "Error sending file: %v, err=%v\n", blobRef, err)
killConnection()
return
}
if bytesCopied != remainBytes {
fmt.Fprintf(os.Stderr, "Error sending file: %v, copied=%d, not %d\n", blobRef,
bytesCopied, remainBytes)
killConnection()
return
}
}
func handlePreUpload(conn http.ResponseWriter, req *http.Request) {
if !(req.Method == "POST" && req.URL.Path == "/camli/preupload") {
httputil.BadRequestError(conn, "Inconfigured handler.")
return
}
req.ParseForm()
camliVersion := req.FormValue("camliversion")
if camliVersion == "" {
httputil.BadRequestError(conn, "No camliversion")
return
}
n := 0
haveVector := new(vector.Vector)
haveChan := make(chan *map[string]interface{})
for {
key := fmt.Sprintf("blob%v", n+1)
value := req.FormValue(key)
if value == "" {
break
}
ref := blobref.Parse(value)
if ref == nil {
httputil.BadRequestError(conn, "Bogus blobref for key "+key)
return
}
if !ref.IsSupported() {
httputil.BadRequestError(conn, "Unsupported or bogus blobref "+key)
}
n++
// Parallel stat all the files...
go func() {
fi, err := os.Stat(BlobFileName(ref))
if err == nil && fi.IsRegular() {
info := make(map[string]interface{})
info["blobRef"] = ref.String()
info["size"] = fi.Size
haveChan <- &info
} else {
haveChan <- nil
}
}()
}
if n > 0 {
for have := range haveChan {
if have != nil {
haveVector.Push(have)
}
n--
if n == 0 {
break
}
}
}
ret := commonUploadResponse(req)
ret["alreadyHave"] = haveVector.Copy()
httputil.ReturnJson(conn, ret)
}