func LargeFileStream(r *multipart.Reader) {
p, err := r.NextPart()
if err == io.EOF {
return
}
file, err := os.OpenFile(p.FileName(), os.O_CREATE|os.O_TRUNC|os.O_RDWR, 0644)
if err != nil {
return
}
defer file.Close()
for {
err := WriteFileChunk(p, file)
if err == io.EOF {
return
}
}
for {
p, err := r.NextPart()
if err == io.EOF {
return
}
for {
err := WriteFileChunk(p, file)
if err == io.EOF {
break
}
}
}
return
}
func extractHTTPFormValues(reader *multipart.Reader) (io.Reader, map[string]string, *probe.Error) {
/// HTML Form values
formValues := make(map[string]string)
filePart := new(bytes.Buffer)
var err error
for err == nil {
var part *multipart.Part
part, err = reader.NextPart()
if part != nil {
if part.FileName() == "" {
buffer, err := ioutil.ReadAll(part)
if err != nil {
return nil, nil, probe.NewError(err)
}
formValues[http.CanonicalHeaderKey(part.FormName())] = string(buffer)
} else {
_, err := io.Copy(filePart, part)
if err != nil {
return nil, nil, probe.NewError(err)
}
}
}
}
return filePart, formValues, nil
}
// Extract form fields and file data from a HTTP POST Policy
func extractPostPolicyFormValues(reader *multipart.Reader) (filePart io.Reader, fileName string, formValues map[string]string, err error) {
/// HTML Form values
formValues = make(map[string]string)
fileName = ""
for err == nil {
var part *multipart.Part
part, err = reader.NextPart()
if part != nil {
canonicalFormName := http.CanonicalHeaderKey(part.FormName())
if canonicalFormName != "File" {
var buffer []byte
limitReader := io.LimitReader(part, maxFormFieldSize+1)
buffer, err = ioutil.ReadAll(limitReader)
if err != nil {
return nil, "", nil, err
}
if int64(len(buffer)) > maxFormFieldSize {
return nil, "", nil, errSizeUnexpected
}
formValues[canonicalFormName] = string(buffer)
} else {
filePart = part
fileName = part.FileName()
// As described in S3 spec, we expect file to be the last form field
break
}
}
}
return filePart, fileName, formValues, nil
}
func parseMultipartContent(content, boundary string) (Content, error) {
var (
reader *multipart.Reader = multipart.NewReader(strings.NewReader(content),
boundary)
part *multipart.Part
mailParts Content = make(Content, 1)
partHeader PMIMEHeader
err error
)
for {
if part, err = reader.NextPart(); err == io.EOF {
// 1) EOF error means, we're finished reading the multiparts
break
} else if err != nil {
// 2) other errors are real => print a warning for that part and continue with the next
fmt.Printf("[watney] WARNING: Couldn't parse multipart 'Part' Header & Content: %s\n",
err.Error())
continue
}
// 3) Try to read the content of this multipart body ...
if readBytes, err := ioutil.ReadAll(part); err != nil {
fmt.Printf("[watney] WARNING: Couldn't read multipart body content: %s\n", err.Error())
continue
} else {
// 4) The body of this part has been successfully parsed => extract content
if partHeader = parseMIMEHeader(part.Header); len(partHeader.ContentType) > 0 {
// 5) We got a Content-Type, check if that one is multipart again
if strings.Contains(partHeader.ContentType, "multipart") {
// 5a) It is multipart => recursively add its parts
if innerParts, err := parseMultipartContent(string(readBytes),
partHeader.MultipartBoundary); err != nil {
fmt.Printf("[watney] WARNING: Couldn't parse inner multipart body: %s\n",
err.Error())
continue
} else {
for key, value := range innerParts {
mailParts[key] = value
}
}
} else {
// 5b) We have a content type other than multipart, just add it
mailParts[partHeader.ContentType] = ContentPart{
Encoding: partHeader.Encoding,
Charset: "UTF-8",
Body: string(readBytes),
}
}
} else {
// 4b) This part has no MIME information -> assume text/plain
// ATTENTION: We're overwriting previously parsed text/plain parts
mailParts["text/plain"] = ContentPart{
Encoding: "quoted-printable",
Charset: "UTF-8",
Body: string(readBytes),
}
}
}
}
return mailParts, nil
}
func (r *Resumable) MakeChunk(reader *multipart.Reader) (*Chunk, error) {
var total int64 = 0
chunk := &Chunk{Body: make([]byte, 0), Extra: make(map[string]string)}
for {
part, err := reader.NextPart()
if err == io.EOF {
break
}
if err != nil {
return nil, err
}
name := part.FormName()
switch name {
case r.OffsetParamName:
v, err := ConsumePart(part, 8, ConsumeInt)
if err != nil {
return nil, errors.New(err.Error() + " (" + name + ")")
}
chunk.Offset = v.(int64)
break
case r.TotalParamName:
v, err := ConsumePart(part, 8, ConsumeInt)
if err != nil {
return nil, errors.New(err.Error() + " (" + name + ")")
}
total = v.(int64)
break
case r.UploadIdParamName:
v, err := ConsumePart(part, 1024, ConsumeString)
if err != nil {
return nil, errors.New(err.Error() + " (" + name + ")")
}
chunk.UploadId = v.(string)
break
case r.FileParamName:
chunk.Filename = part.FileName()
err = r.ReadBody(part, chunk)
if err != nil {
return nil, errors.New(err.Error() + " (" + name + ")")
}
break
default:
v, err := ConsumePart(part, 1024, ConsumeString)
if err != nil {
return nil, errors.New(err.Error() + " (" + name + ")")
}
chunk.Extra[name] = v.(string)
break
}
}
if len(chunk.UploadId) == 0 {
return nil, errors.New("empty" + " (" + r.UploadIdParamName + ")")
}
if len(chunk.Filename) == 0 {
return nil, errors.New("empty" + " (filename)")
}
chunk.Final = chunk.Offset+int64(len(chunk.Body)) >= total
return chunk, nil
}
func formToMap(c *check.C, mr *multipart.Reader) map[string]string {
formData := map[string]string{}
for {
p, err := mr.NextPart()
if err == io.EOF {
break
}
c.Assert(err, check.IsNil)
slurp, err := ioutil.ReadAll(p)
c.Assert(err, check.IsNil)
formData[p.FormName()] = string(slurp)
}
return formData
}
// OpenStream sends request to target and handles
// response. It opens MJPEG-stream and copies received
// frame to m.curImg. It closes stream if m.CloseStream()
// is called or if difference between current time and
// time of last request to ServeHTTP is bigger than timeout.
func (m *Mjpegproxy) openstream(mjpegStream, user, pass string, timeout time.Duration) {
m.setRunning(true)
m.conChan = make(chan time.Time)
m.mjpegStream = mjpegStream
var lastconn time.Time
var img *multipart.Part
request, err := http.NewRequest("GET", mjpegStream, nil)
if err != nil {
log.Fatal(m.mjpegStream, err)
}
if user != "" && pass != "" {
request.SetBasicAuth(user, pass)
}
var response *http.Response
var boundary string
var mpread *multipart.Reader
var starttime time.Time
buf := new(bytes.Buffer)
log.Println("Starting streaming from", mjpegStream)
for m.GetRunning() {
lastconn = <-m.conChan
m.lastConnLock.Lock()
m.lastConn = lastconn
m.lastConnLock.Unlock()
if !m.GetRunning() {
continue
}
response, err = m.getresponse(request)
if err != nil {
log.Println(m.mjpegStream, err)
time.Sleep(m.waittime)
continue
}
starttime = time.Now()
boundary, err = m.getboundary(response)
if err != nil {
log.Println(m.mjpegStream, err)
response.Body.Close()
time.Sleep(m.waittime)
continue
}
mpread = multipart.NewReader(response.Body, boundary)
for m.GetRunning() && (time.Since(lastconn) < timeout) && err == nil {
if time.Since(starttime) > m.responseduration {
break
}
if time.Since(lastconn) > timeout/2 {
m.lastConnLock.RLock()
lastconn = m.lastConn
m.lastConnLock.RUnlock()
}
img, err = mpread.NextPart()
if err != nil {
log.Println(m.mjpegStream, err)
break
}
// buf is an additional buffer that allows
// serving curImg while loading next part.
buf.Reset()
_, err = buf.ReadFrom(io.LimitReader(img, m.partbufsize))
if err != nil {
img.Close()
log.Println(m.mjpegStream, err)
break
}
if m.caching {
m.lastModLock.Lock()
m.lastModified = time.Now().UTC()
m.lastModLock.Unlock()
}
m.curImgLock.Lock()
m.curImg.Reset()
_, err = m.curImg.ReadFrom(buf)
m.curImgLock.Unlock()
img.Close()
if err != nil {
log.Println(m.mjpegStream, err)
break
}
}
response.Body.Close()
time.Sleep(m.waittime)
}
log.Println("Stopped streaming from", mjpegStream)
}
func ReadMultipartDocument(reader *multipart.Reader) (Body, error) {
// First read the main JSON document body:
mainPart, err := reader.NextPart()
if err != nil {
return nil, err
}
var body Body
err = ReadJSONFromMIME(http.Header(mainPart.Header), mainPart, &body)
mainPart.Close()
if err != nil {
return nil, err
}
digestIndex := map[string]string{} // maps digests -> names
// Now look for "following" attachments:
attachments := BodyAttachments(body)
for name, value := range attachments {
meta := value.(map[string]interface{})
if meta["follows"] == true {
digest, ok := meta["digest"].(string)
if !ok {
return nil, &base.HTTPError{http.StatusBadRequest, "Missing digest in attachment"}
}
digestIndex[digest] = name
}
}
// Read the parts one by one:
for i := 0; i < len(digestIndex); i++ {
part, err := reader.NextPart()
if err != nil {
if err == io.EOF {
err = &base.HTTPError{http.StatusBadRequest, "Too few MIME parts"}
}
return nil, err
}
data, err := ioutil.ReadAll(part)
part.Close()
if err != nil {
return nil, err
}
// Look up the attachment by its digest:
digest := sha1DigestKey(data)
name, ok := digestIndex[digest]
if !ok {
name, ok = digestIndex[md5DigestKey(data)]
}
if !ok {
return nil, &base.HTTPError{http.StatusBadRequest,
fmt.Sprintf("MIME part #%d doesn't match any attachment", i+2)}
}
meta := attachments[name].(map[string]interface{})
length, ok := meta["encoded_length"].(float64)
if !ok {
length, ok = meta["length"].(float64)
}
if ok {
if int(length) != len(data) {
return nil, &base.HTTPError{http.StatusBadRequest, fmt.Sprintf("Attachment length mismatch for %q: read %d bytes, should be %g", name, len(data), length)}
}
}
delete(meta, "follows")
meta["data"] = data
meta["digest"] = digest
}
// Make sure there are no unused MIME parts:
_, err = reader.NextPart()
if err != io.EOF {
return nil, &base.HTTPError{http.StatusBadRequest, "Too many MIME parts"}
}
return body, nil
}
func ReadMultipartDocument(reader *multipart.Reader) (Body, error) {
// First read the main JSON document body:
mainPart, err := reader.NextPart()
if err != nil {
return nil, err
}
var body Body
err = ReadJSONFromMIME(http.Header(mainPart.Header), mainPart, &body)
mainPart.Close()
if err != nil {
return nil, err
}
// Collect the attachments with a "follows" property, which will appear as MIME parts:
followingAttachments := map[string]map[string]interface{}{}
for name, value := range BodyAttachments(body) {
if meta := value.(map[string]interface{}); meta["follows"] == true {
followingAttachments[name] = meta
}
}
// Subroutine to look up a following attachment given its digest. (I used to precompute a
// map from digest->name, which was faster, but that broke down if there were multiple
// attachments with the same contents! See #96)
findFollowingAttachment := func(withDigest string) (string, map[string]interface{}) {
for name, meta := range followingAttachments {
if meta["follows"] == true {
if digest, ok := meta["digest"].(string); ok && digest == withDigest {
return name, meta
}
}
}
return "", nil
}
// Read the parts one by one:
for i := 0; i < len(followingAttachments); i++ {
part, err := reader.NextPart()
if err != nil {
if err == io.EOF {
err = base.HTTPErrorf(http.StatusBadRequest,
"Too few MIME parts: expected %d attachments, got %d",
len(followingAttachments), i)
}
return nil, err
}
data, err := ioutil.ReadAll(part)
part.Close()
if err != nil {
return nil, err
}
// Look up the attachment by its digest:
digest := sha1DigestKey(data)
name, meta := findFollowingAttachment(digest)
if meta == nil {
name, meta = findFollowingAttachment(md5DigestKey(data))
if meta == nil {
return nil, base.HTTPErrorf(http.StatusBadRequest,
"MIME part #%d doesn't match any attachment", i+2)
}
}
length, ok := base.ToInt64(meta["encoded_length"])
if !ok {
length, ok = base.ToInt64(meta["length"])
}
if ok {
if length != int64(len(data)) {
return nil, base.HTTPErrorf(http.StatusBadRequest, "Attachment length mismatch for %q: read %d bytes, should be %g", name, len(data), length)
}
}
// Stuff the data into the attachment metadata and remove the "follows" property:
delete(meta, "follows")
meta["data"] = data
meta["digest"] = digest
}
// Make sure there are no unused MIME parts:
if _, err = reader.NextPart(); err != io.EOF {
if err == nil {
err = base.HTTPErrorf(http.StatusBadRequest,
"Too many MIME parts (expected %d)", len(followingAttachments)+1)
}
return nil, err
}
return body, nil
}
func (receiver *endpointReceiver) handleMultipartMessage(mreader *multipart.Reader) (*todoList, error) {
todo := &todoList{}
// iterate through parts of multipart/form-data content
for {
part, err := mreader.NextPart()
if err == io.EOF {
receiver.log.Printf("End of stream reached")
break
} else if err != nil {
return nil, fmt.Errorf("Error reading part: %v", err)
}
formName := part.FormName()
receiver.log.Printf("Handling part: %v", formName)
switch formName {
case "buyersecret":
if receiver.buyerSecret != ZEROHASH {
return nil, fmt.Errorf("Buyer's secret already received")
}
b := make([]byte, 64)
n, err := part.Read(b)
if err != nil || n != len(b) {
return nil, fmt.Errorf("Error reading buyersecret: %v (%v bytes read)", err, n)
}
n, err = hex.Decode(receiver.buyerSecret[:], b)
if err != nil || n != len(receiver.buyerSecret) {
return nil, fmt.Errorf("Error decoding buyersecret: %v (%v bytes written)", err, n)
}
case "work":
if receiver.builder != nil || receiver.workFile != nil {
return nil, fmt.Errorf("Work already received")
}
temp := receiver.storage.Create(receiver.info)
defer temp.Dispose()
const MAXBYTES = 2 << 24 // 16MB
// Copy up to MAXBYTES and expect EOF
if n, err := io.CopyN(temp, part, MAXBYTES); err != io.EOF {
return nil, fmt.Errorf("Work too long or error: %v (%v bytes read)", err, n)
}
if err := temp.Close(); err != nil {
return nil, fmt.Errorf("Error creating file from temporary data: %v", err)
}
receiver.workFile = temp.File()
todo.mustHandleWork = true
case "a32chunks":
if receiver.builder != nil || receiver.workFile != nil {
return nil, fmt.Errorf("Work already received on 'a32chunks'")
}
if b, err := cafs.NewBuilder(receiver.storage, part, receiver.info); err != nil {
return nil, fmt.Errorf("Error receiving chunk hashes: %v", err)
} else {
receiver.builder = b
todo.mustHandleChunkHashes = true
}
case "chunkdata":
if receiver.builder == nil {
return nil, fmt.Errorf("Didn't receive chunk hashes")
}
if receiver.workFile != nil {
return nil, fmt.Errorf("Work already received")
}
if f, err := receiver.builder.ReconstructFileFromRequestedChunks(part); err != nil {
return nil, fmt.Errorf("Error reconstructing work from sent chunks: %v", err)
} else {
receiver.workFile = f
}
todo.mustHandleWork = true
default:
return nil, fmt.Errorf("Don't know what to do with part %#v", formName)
}
}
return todo, nil
}
func main() {
var rr *http.Response
var myreader multipart.Reader
syscall.Umask(0000)
if !parseME() {
os.Exit(1)
}
var requesturl string
requesturl = ("http://" + (*camera_ip) + ":" + strconv.Itoa(*camera_port) + "/mjpg/1/video.mjpg")
fmt.Println("request sent to " + requesturl)
rr, _, _ = http.Get(requesturl)
myreader, _ = MultipartReader(rr)
var p *multipart.Part
var curr_length int = 0
var templen int
var buff []byte
var s string
var m int
var info *os.FileInfo
var err os.Error
info, err = os.Lstat(*save_folder)
if err != nil {
fmt.Println("Folder " + (*save_folder) + " Is problematic")
fmt.Println(err.String())
os.Exit(1)
}
if !info.IsDirectory() {
fmt.Println("Folder " + (*save_folder) + " Is not a directory")
os.Exit(1)
}
var foldertime *time.Time = nil
var foldersecs int64
var folderstamp string
var tstamp_secs int64
var tstamp_nsecs int64
var msecs int64
var update bool
var foldername string
var imagename string
var mywriter *os.File
for i := 0; i < 1; {
p, _ = myreader.NextPart()
update = false
tstamp_secs, tstamp_nsecs, _ = os.Time()
if foldertime == nil {
foldertime = time.SecondsToLocalTime(tstamp_secs)
foldersecs = tstamp_secs
update = true
} else {
if tstamp_secs > foldersecs {
foldertime = time.SecondsToLocalTime(tstamp_secs)
foldersecs = tstamp_secs
update = true
}
}
if update {
folderstamp = strconv.Itoa64(foldertime.Year) + "_" +
strconv.Itoa(foldertime.Month) + "_" +
strconv.Itoa(foldertime.Day) + "_" +
strconv.Itoa(foldertime.Hour) + "_" +
strconv.Itoa(foldertime.Minute) + "_" +
strconv.Itoa(foldertime.Second)
foldername = (*save_folder) + "/" + (*camera_name) + "_" + folderstamp
err = os.Mkdir(foldername, 0700)
if err != nil {
fmt.Fprintf(os.Stderr, "error creating %s because : %s\n", foldername, err.String())
os.Exit(1)
}
}
templen, _ = strconv.Atoi(p.Header["Content-Length"])
if templen > curr_length {
curr_length = templen
buff = make([]byte, curr_length)
}
for counter := 0; counter < templen; {
m, _ = p.Read(buff[counter:templen])
counter += m
}
p.Close()
msecs = tstamp_nsecs / 1e6
imagename = "image_" + folderstamp + "_" + strconv.Itoa64(msecs) + ".jpg"
s = foldername + "/" + imagename
mywriter, err = os.Open(s, os.O_CREAT|os.O_WRONLY, 0600)
if err != nil {
fmt.Fprintf(os.Stderr, "error writing %d bytes because : %s\n", templen, err.String())
os.Exit(1)
}
for counter := 0; counter < templen; {
m, _ = mywriter.Write(buff[counter:templen])
counter += m
}
}
}
