// exec a program, redirecting output
func DateServer(rw http.ResponseWriter, req *http.Request) {
rw.Header().Set("Content-Type", "text/plain; charset=utf-8")
date, err := exec.Command("/bin/date").Output()
if err != nil {
http.Error(rw, err.Error(), 500)
return
}
rw.Write(date)
}
// Symbol looks up the program counters listed in the request,
// responding with a table mapping program counters to function names.
// The package initialization registers it as /debug/pprof/symbol.
func Symbol(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "text/plain; charset=utf-8")
// We have to read the whole POST body before
// writing any output. Buffer the output here.
var buf bytes.Buffer
// We don't know how many symbols we have, but we
// do have symbol information. Pprof only cares whether
// this number is 0 (no symbols available) or > 0.
fmt.Fprintf(&buf, "num_symbols: 1\n")
var b *bufio.Reader
if r.Method == "POST" {
b = bufio.NewReader(r.Body)
} else {
b = bufio.NewReader(strings.NewReader(r.URL.RawQuery))
}
for {
word, err := b.ReadSlice('+')
if err == nil {
word = word[0 : len(word)-1] // trim +
}
pc, _ := strconv.ParseUint(string(word), 0, 64)
if pc != 0 {
f := runtime.FuncForPC(uintptr(pc))
if f != nil {
fmt.Fprintf(&buf, "%#x %s\n", pc, f.Name())
}
}
// Wait until here to check for err; the last
// symbol will have an err because it doesn't end in +.
if err != nil {
if err != io.EOF {
fmt.Fprintf(&buf, "reading request: %v\n", err)
}
break
}
}
w.Write(buf.Bytes())
}
func (h *Handler) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
root := h.Root
if root == "" {
root = "/"
}
if len(req.TransferEncoding) > 0 && req.TransferEncoding[0] == "chunked" {
rw.WriteHeader(http.StatusBadRequest)
rw.Write([]byte("Chunked request bodies are not supported by CGI."))
return
}
pathInfo := req.URL.Path
if root != "/" && strings.HasPrefix(pathInfo, root) {
pathInfo = pathInfo[len(root):]
}
port := "80"
if matches := trailingPort.FindStringSubmatch(req.Host); len(matches) != 0 {
port = matches[1]
}
env := []string{
"SERVER_SOFTWARE=go",
"SERVER_NAME=" + req.Host,
"SERVER_PROTOCOL=HTTP/1.1",
"HTTP_HOST=" + req.Host,
"GATEWAY_INTERFACE=CGI/1.1",
"REQUEST_METHOD=" + req.Method,
"QUERY_STRING=" + req.URL.RawQuery,
"REQUEST_URI=" + req.URL.RequestURI(),
"PATH_INFO=" + pathInfo,
"SCRIPT_NAME=" + root,
"SCRIPT_FILENAME=" + h.Path,
"REMOTE_ADDR=" + req.RemoteAddr,
"REMOTE_HOST=" + req.RemoteAddr,
"SERVER_PORT=" + port,
}
if req.TLS != nil {
env = append(env, "HTTPS=on")
}
for k, v := range req.Header {
k = strings.Map(upperCaseAndUnderscore, k)
joinStr := ", "
if k == "COOKIE" {
joinStr = "; "
}
env = append(env, "HTTP_"+k+"="+strings.Join(v, joinStr))
}
if req.ContentLength > 0 {
env = append(env, fmt.Sprintf("CONTENT_LENGTH=%d", req.ContentLength))
}
if ctype := req.Header.Get("Content-Type"); ctype != "" {
env = append(env, "CONTENT_TYPE="+ctype)
}
if h.Env != nil {
env = append(env, h.Env...)
}
envPath := os.Getenv("PATH")
if envPath == "" {
envPath = "/bin:/usr/bin:/usr/ucb:/usr/bsd:/usr/local/bin"
}
env = append(env, "PATH="+envPath)
for _, e := range h.InheritEnv {
if v := os.Getenv(e); v != "" {
env = append(env, e+"="+v)
}
}
for _, e := range osDefaultInheritEnv[runtime.GOOS] {
if v := os.Getenv(e); v != "" {
env = append(env, e+"="+v)
}
}
env = removeLeadingDuplicates(env)
var cwd, path string
if h.Dir != "" {
path = h.Path
cwd = h.Dir
} else {
cwd, path = filepath.Split(h.Path)
}
if cwd == "" {
cwd = "."
}
internalError := func(err error) {
rw.WriteHeader(http.StatusInternalServerError)
h.printf("CGI error: %v", err)
}
cmd := &exec.Cmd{
Path: path,
Args: append([]string{h.Path}, h.Args...),
Dir: cwd,
Env: env,
Stderr: os.Stderr, // for now
}
if req.ContentLength != 0 {
cmd.Stdin = req.Body
}
stdoutRead, err := cmd.StdoutPipe()
if err != nil {
internalError(err)
return
}
err = cmd.Start()
if err != nil {
internalError(err)
return
}
if hook := testHookStartProcess; hook != nil {
hook(cmd.Process)
}
defer cmd.Wait()
defer stdoutRead.Close()
linebody := bufio.NewReaderSize(stdoutRead, 1024)
headers := make(http.Header)
statusCode := 0
headerLines := 0
sawBlankLine := false
for {
line, isPrefix, err := linebody.ReadLine()
if isPrefix {
rw.WriteHeader(http.StatusInternalServerError)
h.printf("cgi: long header line from subprocess.")
return
}
if err == io.EOF {
break
}
if err != nil {
rw.WriteHeader(http.StatusInternalServerError)
h.printf("cgi: error reading headers: %v", err)
return
}
if len(line) == 0 {
sawBlankLine = true
break
}
headerLines++
parts := strings.SplitN(string(line), ":", 2)
if len(parts) < 2 {
h.printf("cgi: bogus header line: %s", string(line))
continue
}
header, val := parts[0], parts[1]
header = strings.TrimSpace(header)
val = strings.TrimSpace(val)
switch {
case header == "Status":
if len(val) < 3 {
h.printf("cgi: bogus status (short): %q", val)
return
}
code, err := strconv.Atoi(val[0:3])
if err != nil {
h.printf("cgi: bogus status: %q", val)
h.printf("cgi: line was %q", line)
return
}
statusCode = code
default:
headers.Add(header, val)
}
}
if headerLines == 0 || !sawBlankLine {
rw.WriteHeader(http.StatusInternalServerError)
h.printf("cgi: no headers")
return
}
if loc := headers.Get("Location"); loc != "" {
if strings.HasPrefix(loc, "/") && h.PathLocationHandler != nil {
h.handleInternalRedirect(rw, req, loc)
return
}
if statusCode == 0 {
statusCode = http.StatusFound
}
}
if statusCode == 0 && headers.Get("Content-Type") == "" {
rw.WriteHeader(http.StatusInternalServerError)
h.printf("cgi: missing required Content-Type in headers")
return
}
if statusCode == 0 {
statusCode = http.StatusOK
}
// Copy headers to rw's headers, after we've decided not to
// go into handleInternalRedirect, which won't want its rw
// headers to have been touched.
for k, vv := range headers {
for _, v := range vv {
rw.Header().Add(k, v)
}
}
rw.WriteHeader(statusCode)
_, err = io.Copy(rw, linebody)
if err != nil {
h.printf("cgi: copy error: %v", err)
// And kill the child CGI process so we don't hang on
// the deferred cmd.Wait above if the error was just
// the client (rw) going away. If it was a read error
// (because the child died itself), then the extra
// kill of an already-dead process is harmless (the PID
// won't be reused until the Wait above).
cmd.Process.Kill()
}
}
func (s ConstantServer) ServeHTTP(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "text/plain; charset=iso-8859-8")
//w.Header().Set("Content-Type","text/plain; charset=cp-1255")
w.Write([]byte{0xe3, 0xf3})
}