func handleConn(conn net.Conn) {
defer conn.Close()
log.Println("connected from:", conn.RemoteAddr())
dst, err := dialer.Dial("tcp", *dstAddr)
if err != nil {
log.Println(err)
return
}
defer dst.Close()
wg := &sync.WaitGroup{}
wg.Add(2)
go func(wg *sync.WaitGroup) {
buf := bufferPool.Get()
_, err = io.CopyBuffer(conn, dst, buf.([]byte))
if err != nil {
log.Println(err)
}
bufferPool.Put(buf)
wg.Done()
}(wg)
go func(wg *sync.WaitGroup) {
buf := bufferPool.Get()
_, err = io.CopyBuffer(dst, conn, buf.([]byte))
if err != nil {
log.Println(err)
}
bufferPool.Put(buf)
wg.Done()
}(wg)
wg.Wait()
}
func forward(lconn net.Conn, raddr string) {
if err := exec.Command("wakeonlan", "18:66:DA:17:A2:95").Run(); err != nil {
glog.Warningf("exec wakeonlan error: %+v", err)
}
glog.Infof("try connect to %+v for %+v forwarding", raddr, lconn.RemoteAddr())
rconn, err := net.Dial("tcp", raddr)
if err != nil {
glog.Errorf("net.Dial(%#v) error: %v", raddr, err)
return
}
glog.Infof("forward %+v to %+v", lconn.RemoteAddr(), rconn.RemoteAddr())
go func() {
buf := bufpool.Get().([]byte)
defer bufpool.Put(buf)
defer rconn.Close()
defer lconn.Close()
io.CopyBuffer(rconn, lconn, buf)
}()
go func() {
buf := bufpool.Get().([]byte)
defer bufpool.Put(buf)
defer lconn.Close()
defer rconn.Close()
io.CopyBuffer(lconn, rconn, buf)
}()
}
func (p *Proxy) proxy(w http.ResponseWriter, r *http.Request) {
if p.daemon.VM == nil {
w.WriteHeader(http.StatusServiceUnavailable)
w.Write([]byte("The virtual machine has not been started"))
return
}
addr, err := p.daemon.VM.Address()
if err != nil {
w.WriteHeader(http.StatusServiceUnavailable)
w.Write([]byte("Unable to locate the virtual machine"))
return
}
backend, err := net.DialTCP("tcp", nil, addr)
if err != nil {
w.WriteHeader(http.StatusServiceUnavailable)
w.Write([]byte("Unable to connect to the virtual machine"))
return
}
defer backend.Close()
r.URL.Scheme = "http"
r.URL.Host = fmt.Sprintf("%s:%d", addr.IP.String(), addr.Port)
hijacker, ok := w.(http.Hijacker)
if !ok {
w.WriteHeader(http.StatusServiceUnavailable)
w.Write([]byte("Unable to create hijacker"))
return
}
conn, _, err := hijacker.Hijack()
if err != nil {
w.WriteHeader(http.StatusServiceUnavailable)
w.Write([]byte("Unable to hijack connection"))
return
}
r.Write(backend)
finished := make(chan error, 1)
go func(backend *net.TCPConn, conn net.Conn, finished chan error) {
buf := make([]byte, 8092)
_, err := io.CopyBuffer(backend, conn, buf)
backend.CloseWrite()
finished <- err
}(backend, conn, finished)
go func(backend *net.TCPConn, conn net.Conn, finished chan error) {
buf := make([]byte, 8092)
_, err := io.CopyBuffer(conn, backend, buf)
conn.Close()
finished <- err
}(backend, conn, finished)
<-finished
<-finished
}
func TestBigFile(t *testing.T) {
src := testutil.CreateDummyBuf(147611)
dst := &bytes.Buffer{}
srcEnc := &bytes.Buffer{}
wEnc, err := encrypt.NewWriter(srcEnc, TestKey)
if err != nil {
t.Errorf("Cannot create write-encryption layer: %v", err)
return
}
if err := wEnc.Close(); err != nil {
t.Errorf("Cannot close write-encryption layer: %v", err)
return
}
wDec, err := encrypt.NewReader(bytes.NewReader(srcEnc.Bytes()), TestKey)
if err != nil {
t.Errorf("Cannot create read-encryption layer: %v", err)
return
}
// Act a bit like the fuse layer:
lay := NewLayer(wDec)
lay.Truncate(0)
bufSize := 128 * 1024
if _, err := io.CopyBuffer(lay, bytes.NewReader(src), make([]byte, bufSize)); err != nil {
t.Errorf("Could not encrypt data")
return
}
lay.Truncate(int64(len(src)))
if _, err := lay.Seek(0, os.SEEK_SET); err != nil {
t.Errorf("Seeking to 0 in big file failed: %v", err)
return
}
n, err := io.CopyBuffer(dst, lay, make([]byte, bufSize))
if err != nil {
t.Errorf("Could not copy big file data over overlay: %v", err)
return
}
if n != int64(len(src)) {
t.Errorf("Did not fully copy big file: got %d, should be %d bytes", n, len(src))
return
}
if !bytes.Equal(dst.Bytes(), src) {
t.Errorf("Source and destination buffers differ.")
return
}
}
func testDeterministic(i int, t *testing.T) {
t.Parallel()
// Test so much we cross a good number of block boundaries.
var length = maxStoreBlockSize*30 + 500
if testing.Short() {
length /= 10
}
// Create a random, but compressible stream.
rng := rand.New(rand.NewSource(1))
t1 := make([]byte, length)
for i := range t1 {
t1[i] = byte(rng.Int63() & 7)
}
// Do our first encode.
var b1 bytes.Buffer
br := bytes.NewBuffer(t1)
w, err := NewWriter(&b1, i)
if err != nil {
t.Fatal(err)
}
// Use a very small prime sized buffer.
cbuf := make([]byte, 787)
_, err = io.CopyBuffer(w, struct{ io.Reader }{br}, cbuf)
if err != nil {
t.Fatal(err)
}
w.Close()
// We choose a different buffer size,
// bigger than a maximum block, and also a prime.
var b2 bytes.Buffer
cbuf = make([]byte, 81761)
br2 := bytes.NewBuffer(t1)
w2, err := NewWriter(&b2, i)
if err != nil {
t.Fatal(err)
}
_, err = io.CopyBuffer(w2, struct{ io.Reader }{br2}, cbuf)
if err != nil {
t.Fatal(err)
}
w2.Close()
b1b := b1.Bytes()
b2b := b2.Bytes()
if !bytes.Equal(b1b, b2b) {
t.Errorf("level %d did not produce deterministic result, result mismatch, len(a) = %d, len(b) = %d", i, len(b1b), len(b2b))
}
}
// In performance critical applications, Reset can be used to discard the
// current compressor or decompressor state and reinitialize them quickly
// by taking advantage of previously allocated memory.
func Example_reset() {
proverbs := []string{
"Don't communicate by sharing memory, share memory by communicating.\n",
"Concurrency is not parallelism.\n",
"The bigger the interface, the weaker the abstraction.\n",
"Documentation is for users.\n",
}
var r strings.Reader
var b bytes.Buffer
buf := make([]byte, 32<<10)
zw, err := flate.NewWriter(nil, flate.DefaultCompression)
if err != nil {
log.Fatal(err)
}
zr := flate.NewReader(nil)
for _, s := range proverbs {
r.Reset(s)
b.Reset()
// Reset the compressor and encode from some input stream.
zw.Reset(&b)
if _, err := io.CopyBuffer(zw, &r, buf); err != nil {
log.Fatal(err)
}
if err := zw.Close(); err != nil {
log.Fatal(err)
}
// Reset the decompressor and decode to some output stream.
if err := zr.(flate.Resetter).Reset(&b, nil); err != nil {
log.Fatal(err)
}
if _, err := io.CopyBuffer(os.Stdout, zr, buf); err != nil {
log.Fatal(err)
}
if err := zr.Close(); err != nil {
log.Fatal(err)
}
}
// Output:
// Don't communicate by sharing memory, share memory by communicating.
// Concurrency is not parallelism.
// The bigger the interface, the weaker the abstraction.
// Documentation is for users.
}
func (z *unzipper) unzip(f *zip.File) error {
if f.FileInfo().IsDir() {
return nil
}
fName := filepath.Join(z.dst, f.Name)
dir, _ := filepath.Split(fName)
if err := os.MkdirAll(dir, perm); err != nil && os.IsNotExist(err) {
return err
}
r, err := f.Open()
if err != nil {
return err
}
defer r.Close()
w, err := os.Create(filepath.Join(z.dst, f.Name))
if err != nil {
return err
}
defer w.Close()
if _, err := io.CopyBuffer(w, r, z.buffer); err != nil {
w.Close()
return err
}
if err := r.Close(); err != nil {
return err
}
return w.Close()
}
// zipper.walk gets called for each file in given directory tree
func (z *zipper) walk(path string, info os.FileInfo, err error) error {
if err != nil {
return err
}
if !info.Mode().IsRegular() || info.Size() == 0 {
return nil
}
file, err := os.Open(path)
if err != nil {
return err
}
defer file.Close()
fileName := strings.TrimPrefix(path, z.src+string(filepath.Separator))
w, err := z.writer.Create(fileName)
if err != nil {
return err
}
_, err = io.CopyBuffer(w, file, z.buffer)
return err
}
// hashCopyBuffer is identical to hashCopyN except that it stages
// through the provided buffer (if one is required) rather than
// allocating a temporary one. If buf is nil, one is allocated for 5MiB.
func (c Client) hashCopyBuffer(writer io.Writer, reader io.Reader, buf []byte) (md5Sum, sha256Sum []byte, size int64, err error) {
// MD5 and SHA256 hasher.
var hashMD5, hashSHA256 hash.Hash
// MD5 and SHA256 hasher.
hashMD5 = md5.New()
hashWriter := io.MultiWriter(writer, hashMD5)
if c.signature.isV4() {
hashSHA256 = sha256.New()
hashWriter = io.MultiWriter(writer, hashMD5, hashSHA256)
}
// Allocate buf if not initialized.
if buf == nil {
buf = make([]byte, optimalReadBufferSize)
}
// Using io.CopyBuffer to copy in large buffers, default buffer
// for io.Copy of 32KiB is too small.
size, err = io.CopyBuffer(hashWriter, reader, buf)
if err != nil {
return nil, nil, 0, err
}
// Finalize md5 sum and sha256 sum.
md5Sum = hashMD5.Sum(nil)
if c.signature.isV4() {
sha256Sum = hashSHA256.Sum(nil)
}
return md5Sum, sha256Sum, size, err
}
// Verify returns nil or an error describing the mismatch between the block
// list and actual reader contents
func Verify(r io.Reader, blocksize int, blocks []protocol.BlockInfo) error {
hf := sha256.New()
// A 32k buffer is used for copying into the hash function.
buf := make([]byte, 32<<10)
for i, block := range blocks {
lr := &io.LimitedReader{R: r, N: int64(blocksize)}
_, err := io.CopyBuffer(hf, lr, buf)
if err != nil {
return err
}
hash := hf.Sum(nil)
hf.Reset()
if !bytes.Equal(hash, block.Hash) {
return fmt.Errorf("hash mismatch %x != %x for block %d", hash, block.Hash, i)
}
}
// We should have reached the end now
bs := make([]byte, 1)
n, err := r.Read(bs)
if n != 0 || err != io.EOF {
return fmt.Errorf("file continues past end of blocks")
}
return nil
}
func handleArticle(c *v1Conn, line string, hooks EventHooks) (err error) {
msgid := MessageID(line[8:])
if msgid.Valid() && c.storage.HasArticle(msgid.String()) == nil {
// valid id and we have it
var r io.ReadCloser
var buff [1024]byte
r, err = c.storage.OpenArticle(msgid.String())
if err == nil {
err = c.printfLine("%s %s", RPL_Article, msgid)
for err == nil {
_, err = io.CopyBuffer(c.C.W, r, buff[:])
}
if err == io.EOF {
err = nil
}
if err == nil {
err = c.printfLine(".")
}
r.Close()
return
}
}
// invalid id or we don't have it
err = c.printfLine("%s %s", RPL_NoArticleMsgID, msgid)
return
}
func (t *tarmonster) walk(path string, info os.FileInfo, err error) error {
if err != nil {
return err
}
if !info.Mode().IsRegular() || info.Size() == 0 {
return nil
}
file, err := os.Open(path)
if err != nil {
return err
}
defer file.Close()
// Get tar.Header
fih, err := tar.FileInfoHeader(info, "")
if err != nil {
return err
}
fih.Name = strings.TrimPrefix(path, t.src+string(filepath.Separator))
// Begin a new file
if err := t.writer.WriteHeader(fih); err != nil {
return err
}
// Write the file
if _, err := io.CopyBuffer(t.writer, file, t.buffer); err != nil {
return err
}
return err
}
// AppendFile - append a byte array at path, if file doesn't exist at
// path this call explicitly creates it.
func (s *posix) AppendFile(volume, path string, buf []byte) (err error) {
defer func() {
if err == syscall.EIO {
atomic.AddInt32(&s.ioErrCount, 1)
}
}()
if s.ioErrCount > maxAllowedIOError {
return errFaultyDisk
}
// Create file if not found
w, err := s.createFile(volume, path)
if err != nil {
return err
}
// Close upon return.
defer w.Close()
bufp := s.pool.Get().(*[]byte)
// Reuse buffer.
defer s.pool.Put(bufp)
// Return io.Copy
_, err = io.CopyBuffer(w, bytes.NewReader(buf), *bufp)
return err
}
func copyZeroAlloc(w io.Writer, r io.Reader) (int64, error) {
vbuf := copyBufPool.Get()
buf := vbuf.([]byte)
n, err := io.CopyBuffer(w, r, buf)
copyBufPool.Put(vbuf)
return n, err
}
// get ftp-file and parse to lines
func (v *FTPConn) FTPFile(filename *ftp.Entry) (good bool, errOut error) {
rd, err := v.ServerConn.Retr(filename.Name)
if err != nil {
errOut = err
CLog.PrintLog(true, "Error getting the file: ", filename.Name, ". ", errOut)
return false, errOut
}
reader := bufio.NewReader(rd)
err = nil
fiDesc, err := os.Create(filename.Name)
if err != nil {
errOut = err
CLog.PrintLog(true, "Error creating the file: ", filename.Name, ". ", errOut)
rd.Close()
return false, errOut
}
err = nil
buf := make([]byte, bufferSize)
writer := bufio.NewWriter(fiDesc)
writeBytes, err := io.CopyBuffer(writer, reader, buf)
//writeBytes, err := io.Copy(writer, reader)
if err != nil || uint64(writeBytes) != filename.Size {
errOut = err
CLog.PrintLog(true, "Error writing the file: ", filename.Name, ". ", errOut)
rd.Close()
return false, errOut
}
writer.Flush()
rd.Close()
return true, errOut
}
func doCopy(source string, dest string, createReader createReaderFunc, createWriter createWriterFunc) (err error) {
sf, err := os.Open(source)
if err != nil {
return err
}
defer sf.Close()
reader := createReader(sf)
df, err := os.OpenFile(dest, os.O_WRONLY|os.O_CREATE, 0644)
if err != nil {
return err
}
var writer io.Writer
defer func() {
if writer != nil {
if flusher, ok := writer.(Flusher); ok {
flusher.Flush()
}
}
df.Close()
}()
writer = createWriter(df)
buffer := make([]byte, ioBufferSize)
_, err = io.CopyBuffer(writer, reader, buffer)
if err != nil && err != io.EOF {
return err
}
err = df.Sync()
if err != nil {
return err
}
return nil
}
func writeBodyFixedSize(w *bufio.Writer, r io.Reader, size int) error {
vbuf := copyBufPool.Get()
if vbuf == nil {
vbuf = make([]byte, 4096)
}
buf := vbuf.([]byte)
vlr := limitReaderPool.Get()
if vlr == nil {
vlr = &io.LimitedReader{}
}
lr := vlr.(*io.LimitedReader)
lr.R = r
lr.N = int64(size)
n, err := io.CopyBuffer(w, lr, buf)
limitReaderPool.Put(vlr)
copyBufPool.Put(vbuf)
if n != int64(size) && err == nil {
err = fmt.Errorf("read %d bytes from BodyStream instead of %d bytes", n, size)
}
return err
}
func checkForCorrectFile(t *testing.T, path string, data []byte) bool {
// Try to read it over fuse:
helloBuffer := &bytes.Buffer{}
fd, err := os.Open(path)
if err != nil {
t.Errorf("Unable to open simple file over fuse: %v", err)
return false
}
defer func() {
if err := fd.Close(); err != nil {
t.Errorf("Unable to close simple file over fuse: %v", err)
}
}()
n, err := io.CopyBuffer(helloBuffer, fd, make([]byte, 128*1024))
if err != nil {
t.Errorf("Unable to read full simple file over fuse: %v", err)
return false
}
if n != int64(len(data)) {
t.Errorf("Data differs over fuse: got %d, should be %d bytes", n, len(data))
return false
}
if !bytes.Equal(helloBuffer.Bytes(), data) {
t.Errorf("Data from simple file does not match source. Len: %d", len(data))
t.Errorf("\tExpected: %v", data)
t.Errorf("\tGot: %v", helloBuffer.Bytes())
return false
}
return true
}
// XServerProxy creates a TCP proxy on port 6000 to a the Unix
// socket that XQuartz is listening on.
//
// NOTE: this function does not start/install the XQuartz service
func XServerProxy(port int) {
if runtime.GOOS != "darwin" {
log.Debug("Not running an OSX environment, skip run X Server Proxy")
return
}
l, err := net.Listen("tcp", fmt.Sprintf(":%d", port))
if err != nil {
log.Fatal(err)
}
defer l.Close()
// Send all traffic back to unix $DISPLAY socket on a running XQuartz server
addr, err := net.ResolveUnixAddr("unix", os.Getenv("DISPLAY"))
if err != nil {
log.Error("Error: ", err.Error())
}
log.Info("X Service Proxy available on all network interfaces on port %d", port)
if host, err := utils.DockerVMHost(); err == nil {
log.Info("Parity has detected your Docker environment and recommends running 'export DISPLAY=%s:0' in your container to forward the X display", host)
}
for {
xServerClient, err := net.DialUnix("unix", nil, addr)
if err != nil {
log.Error("Error: ", err.Error())
}
defer xServerClient.Close()
conn, err := l.Accept()
log.Debug("X Service Proxy connected to client on: %s (remote: %s)", conn.LocalAddr(), conn.RemoteAddr())
if err != nil {
log.Fatal(err)
}
go func(c net.Conn, s *net.UnixConn) {
buf := make([]byte, 8092)
io.CopyBuffer(s, c, buf)
s.CloseWrite()
}(conn, xServerClient)
go func(c net.Conn, s *net.UnixConn) {
buf := make([]byte, 8092)
io.CopyBuffer(c, s, buf)
c.Close()
}(conn, xServerClient)
}
}
// UnpackModpack downloads mods and unpacks file contents.
func UnpackModpack(fname string) {
z, ze := zip.OpenReader(fname)
util.Must(ze)
defer util.MustClose(z)
info := new(modpackmanifest)
var zf *zip.File
ov := "overrides/"
buf := make([]byte, 32*1024)
for _, zf = range z.File {
if zf.Name == "manifest.json" {
ozf, oze := zf.Open()
util.Must(oze)
util.Must(json.NewDecoder(ozf).Decode(info))
util.MustClose(ozf)
break
}
}
if info != nil {
ov = info.Overrides + "/"
for i, xf := range info.Files {
pid := strconv.FormatInt(int64(xf.PID), 10)
pkg := GetPackage(pid)
if pkg == nil {
fmt.Printf("Package with ID %s is missing!\n", pid)
continue
}
fmt.Printf("%d / %d ", i, len(info.Files))
pkg.DownloadFileWithID(strconv.FormatInt(int64(xf.FID), 10), buf)
}
}
lov := len(ov)
for _, zf = range z.File {
if len(zf.Name) < lov {
continue
}
n := zf.Name[:lov]
if n == ov {
n = zf.Name[lov:]
if n == "" {
continue
}
if zf.FileInfo().IsDir() {
util.Must(util.MkDirIfNotExist(n))
} else {
xf, xe := zf.Open()
util.Must(xe)
fmt.Printf("Unpacking %#v...\n", n)
pr := util.NewReadProgress(xf, zf.UncompressedSize64)
f, fe := os.Create(n)
util.Must(fe)
_, ce := io.CopyBuffer(f, pr, buf)
util.Must(ce)
util.MustClose(f)
util.MustClose(xf)
pr.Close()
}
}
}
}
func (r *stringReader) Discard(n int) (int, error) {
r.limRd = io.LimitedReader{R: r, N: int64(n)}
n64, err := io.CopyBuffer(ioutil.Discard, &r.limRd, r.scratch[:])
if err == nil && n64 < int64(n) {
err = io.EOF
}
return int(n64), err
}
// Decrypt is a utility function which decrypts the data from source with key
// and writes the resulting encrypted data to dest.
func Decrypt(key []byte, source io.Reader, dest io.Writer) (int64, error) {
layer, err := NewReader(source, key)
if err != nil {
return 0, err
}
return io.CopyBuffer(dest, layer, make([]byte, defaultDecBufferSize))
}
func throughput(b *testing.B, totalBytes int64, dynamicRecordSizingDisabled bool) {
ln := newLocalListener(b)
defer ln.Close()
N := b.N
// Less than 64KB because Windows appears to use a TCP rwin < 64KB.
// See Issue #15899.
const bufsize = 32 << 10
go func() {
buf := make([]byte, bufsize)
for i := 0; i < N; i++ {
sconn, err := ln.Accept()
if err != nil {
// panic rather than synchronize to avoid benchmark overhead
// (cannot call b.Fatal in goroutine)
panic(fmt.Errorf("accept: %v", err))
}
serverConfig := testConfig.Clone()
serverConfig.CipherSuites = nil // the defaults may prefer faster ciphers
serverConfig.DynamicRecordSizingDisabled = dynamicRecordSizingDisabled
srv := Server(sconn, serverConfig)
if err := srv.Handshake(); err != nil {
panic(fmt.Errorf("handshake: %v", err))
}
if _, err := io.CopyBuffer(srv, srv, buf); err != nil {
panic(fmt.Errorf("copy buffer: %v", err))
}
}
}()
b.SetBytes(totalBytes)
clientConfig := testConfig.Clone()
clientConfig.CipherSuites = nil // the defaults may prefer faster ciphers
clientConfig.DynamicRecordSizingDisabled = dynamicRecordSizingDisabled
buf := make([]byte, bufsize)
chunks := int(math.Ceil(float64(totalBytes) / float64(len(buf))))
for i := 0; i < N; i++ {
conn, err := Dial("tcp", ln.Addr().String(), clientConfig)
if err != nil {
b.Fatal(err)
}
for j := 0; j < chunks; j++ {
_, err := conn.Write(buf)
if err != nil {
b.Fatal(err)
}
_, err = io.ReadFull(conn, buf)
if err != nil {
b.Fatal(err)
}
}
conn.Close()
}
}
func ExampleCopyBuffer() {
r1 := strings.NewReader("first reader\n")
r2 := strings.NewReader("second reader\n")
buf := make([]byte, 8)
// buf is used here...
if _, err := io.CopyBuffer(os.Stdout, r1, buf); err != nil {
log.Fatal(err)
}
// ... reused here also. No need to allocate an extra buffer.
if _, err := io.CopyBuffer(os.Stdout, r2, buf); err != nil {
log.Fatal(err)
}
// Output:
// first reader
// second reader
}
// readMetaData reads meta data according to RFC section 9.2.
func (br *Reader) readMetaData() {
rd := io.LimitReader(&br.rd, int64(br.blkLen))
br.metaBuf = extendUint8s(br.metaBuf, 4096) // Lazy allocate
if cnt, err := io.CopyBuffer(br.metaWr, rd, br.metaBuf); err != nil {
panic(err)
} else if cnt < int64(br.blkLen) {
panic(io.ErrUnexpectedEOF)
}
br.readBlockHeader()
}
func BenchmarkReadWriter(b *testing.B) {
buf := newWriter(nil)
data, _ := ioutil.ReadAll(io.LimitReader(rand.Reader, 32*1024))
temp := make([]byte, 32*1024)
for i := 0; i < b.N; i++ {
buf.Write(data)
io.CopyBuffer(ioutil.Discard, buf, temp)
}
b.ReportAllocs()
}
// Test if errors from the underlying writer is passed upwards.
func TestWriteError(t *testing.T) {
t.Parallel()
buf := new(bytes.Buffer)
n := 65536
if !testing.Short() {
n *= 4
}
for i := 0; i < n; i++ {
fmt.Fprintf(buf, "asdasfasf%d%dfghfgujyut%dyutyu\n", i, i, i)
}
in := buf.Bytes()
// We create our own buffer to control number of writes.
copyBuffer := make([]byte, 128)
for l := 0; l < 10; l++ {
for fail := 1; fail <= 256; fail *= 2 {
// Fail after 'fail' writes
ew := &errorWriter{N: fail}
w, err := NewWriter(ew, l)
if err != nil {
t.Fatalf("NewWriter: level %d: %v", l, err)
}
n, err := io.CopyBuffer(w, struct{ io.Reader }{bytes.NewBuffer(in)}, copyBuffer)
if err == nil {
t.Fatalf("Level %d: Expected an error, writer was %#v", l, ew)
}
n2, err := w.Write([]byte{1, 2, 2, 3, 4, 5})
if n2 != 0 {
t.Fatal("Level", l, "Expected 0 length write, got", n)
}
if err == nil {
t.Fatal("Level", l, "Expected an error")
}
err = w.Flush()
if err == nil {
t.Fatal("Level", l, "Expected an error on flush")
}
err = w.Close()
if err == nil {
t.Fatal("Level", l, "Expected an error on close")
}
w.Reset(ioutil.Discard)
n2, err = w.Write([]byte{1, 2, 3, 4, 5, 6})
if err != nil {
t.Fatal("Level", l, "Got unexpected error after reset:", err)
}
if n2 == 0 {
t.Fatal("Level", l, "Got 0 length write, expected > 0")
}
if testing.Short() {
return
}
}
}
}
// 下载对账单到 io.Writer.
func downloadBillToWriter(writer io.Writer, req map[string]string, httpClient *http.Client) (written int64, err error) {
if httpClient == nil {
httpClient = http.DefaultClient
}
buf := make([]byte, 32*1024) // 与 io.copyBuffer 里的默认大小一致
reqBuf := bytes.NewBuffer(buf[:0])
if err = util.EncodeXMLFromMap(reqBuf, req, "xml"); err != nil {
return
}
httpResp, err := httpClient.Post("https://api.mch.weixin.qq.com/pay/downloadbill", "text/xml; charset=utf-8", reqBuf)
if err != nil {
return
}
defer httpResp.Body.Close()
if httpResp.StatusCode != http.StatusOK {
err = fmt.Errorf("http.Status: %s", httpResp.Status)
return
}
n, err := io.ReadFull(httpResp.Body, buf)
switch {
case err == nil:
// n == len(buf), 可以认为返回的是对账单而不是xml格式的错误信息
written, err = bytes.NewReader(buf).WriteTo(writer)
if err != nil {
return
}
var n2 int64
n2, err = io.CopyBuffer(writer, httpResp.Body, buf)
written += n2
return
case err == io.ErrUnexpectedEOF:
readBytes := buf[:n]
if index := bytes.Index(readBytes, downloadBillErrorRootNodeStartElement); index != -1 {
if bytes.Contains(readBytes[index+len(downloadBillErrorRootNodeStartElement):], downloadBillErrorReturnCodeNodeStartElement) {
// 可以认为是错误信息了, 尝试解析xml
var result core.Error
if err = xml.Unmarshal(readBytes, &result); err == nil {
err = &result
return
}
// err != nil 执行默认的动作, 写入 writer
}
}
return bytes.NewReader(readBytes).WriteTo(writer)
case err == io.EOF: // 返回空的body
err = nil
return
default: // 其他的错误
return
}
}
func walk(path string, info os.FileInfo, inErr error) (err error) {
if inErr != nil {
return inErr
}
if !info.Mode().IsRegular() {
return
}
shouldRemove := false
file, err := os.Open(path)
if err != nil {
return
}
defer func() {
file.Close()
if shouldRemove {
err = os.Remove(path)
}
}()
crc32Hash.Reset()
md5Hash.Reset()
sha1Hash.Reset()
md5TeeReader := io.TeeReader(file, md5Hash)
sha1TeeReader := io.TeeReader(md5TeeReader, sha1Hash)
io.CopyBuffer(crc32Hash, sha1TeeReader, copyBuffer)
var key FileSum
key.size = info.Size()
key.crc32Sum = crc32Hash.Sum32()
copy(key.md5Sum[:], md5Hash.Sum(nil))
copy(key.sha1Sum[:], sha1Hash.Sum(nil))
fmt.Printf("path: %s\r\nsize: %d bytes\r\ncrc32: %x\r\nmd5: %s\r\nsha1: %s\r\n\r\n",
path,
key.size,
key.crc32Sum,
hex.EncodeToString(key.md5Sum[:]),
hex.EncodeToString(key.sha1Sum[:]),
)
if pathx, ok := FileSumSet[key]; ok {
shouldRemove = true
fmt.Printf("%s 与 %s 重复, 将被移除\r\n", path, pathx)
} else {
FileSumSet[key] = path
}
return
}
// deliver mail to this maildir
func (d MailDir) Deliver(body io.Reader) (err error) {
var oldwd string
oldwd, err = os.Getwd()
if err == nil {
// no error getting working directory, let's begin
// when done chdir to previous directory
defer func() {
err := os.Chdir(oldwd)
if err != nil {
glog.Fatal("chdir failed", err)
}
}()
// chdir to maildir
err = os.Chdir(d.String())
if err == nil {
fname := d.File()
for {
_, err = os.Stat(d.Temp(fname))
if os.IsNotExist(err) {
break
}
time.Sleep(time.Second * 2)
fname = d.File()
}
// set err to nil
err = nil
var f *os.File
// create tmp file
f, err = os.Create(d.Temp(fname))
if err == nil {
// success creation
err = f.Close()
}
// try writing file
if err == nil {
f, err = os.OpenFile(d.Temp(fname), os.O_CREATE|os.O_WRONLY, 0600)
if err == nil {
// write body
_, err = io.CopyBuffer(f, body, nil)
f.Close()
if err == nil {
// now symlink
err = os.Symlink(filepath.Join("tmp", fname), filepath.Join("new", fname))
// if err is nil it's delivered
}
}
}
}
}
return
}