func httpProxy(writer http.ResponseWriter, request *http.Request) {
proxyRequest := new(http.Request)
*proxyRequest = *request
log.Printf("request = %s %s", request.Method, request.URL.Host)
if strings.ToUpper(proxyRequest.Method) == "CONNECT" {
hostPort := request.URL.Host
pandora, err := dialer.Dial("tcp", hostPort) // tuner.pandora.com:443
if err != nil {
log.Printf("pianobarproxy: error: %v", err)
writer.WriteHeader(http.StatusInternalServerError)
return
}
client, writer, err := writer.(http.Hijacker).Hijack()
writer.WriteString("HTTP/1.0 200 Connection Established\r\n\r\n")
writer.Flush()
go pipe(client, pandora)
go pipe(pandora, client)
return
}
proxyRequest.Proto = "HTTP/1.1"
proxyRequest.ProtoMajor = 1
proxyRequest.ProtoMinor = 1
proxyRequest.Close = false
// Remove the connection header to the backend. We want a
// persistent connection, regardless of what the client sent
// to us.
if proxyRequest.Header.Get("Connection") != "" {
proxyRequest.Header = make(http.Header)
copyHeader(proxyRequest.Header, request.Header)
proxyRequest.Header.Del("Connection")
}
response, err := transport.RoundTrip(proxyRequest)
if err != nil {
log.Printf("pianobarproxy: error: %v", err)
writer.WriteHeader(http.StatusInternalServerError)
return
}
copyHeader(writer.Header(), response.Header)
writer.WriteHeader(response.StatusCode)
if response.Body != nil {
io.Copy(io.Writer(writer), response.Body)
}
}
// serveQuery parses an incoming query and, if valid, executes the query.
func (h *Handler) serveQuery(w http.ResponseWriter, r *http.Request, user *meta.UserInfo) {
atomic.AddInt64(&h.stats.QueryRequests, 1)
defer func(start time.Time) {
atomic.AddInt64(&h.stats.QueryRequestDuration, time.Since(start).Nanoseconds())
}(time.Now())
// Retrieve the underlying ResponseWriter or initialize our own.
rw, ok := w.(ResponseWriter)
if !ok {
rw = NewResponseWriter(w, r)
}
// Retrieve the node id the query should be executed on.
nodeID, _ := strconv.ParseUint(r.FormValue("node_id"), 10, 64)
var qr io.Reader
// Attempt to read the form value from the "q" form value.
if qp := strings.TrimSpace(r.FormValue("q")); qp != "" {
qr = strings.NewReader(qp)
} else if r.MultipartForm != nil && r.MultipartForm.File != nil {
// If we have a multipart/form-data, try to retrieve a file from 'q'.
if fhs := r.MultipartForm.File["q"]; len(fhs) > 0 {
f, err := fhs[0].Open()
if err != nil {
h.httpError(rw, err.Error(), http.StatusBadRequest)
return
}
defer f.Close()
qr = f
}
}
if qr == nil {
h.httpError(rw, `missing required parameter "q"`, http.StatusBadRequest)
return
}
epoch := strings.TrimSpace(r.FormValue("epoch"))
p := influxql.NewParser(qr)
db := r.FormValue("db")
// Sanitize the request query params so it doesn't show up in the response logger.
// Do this before anything else so a parsing error doesn't leak passwords.
sanitize(r)
// Parse the parameters
rawParams := r.FormValue("params")
if rawParams != "" {
var params map[string]interface{}
decoder := json.NewDecoder(strings.NewReader(rawParams))
decoder.UseNumber()
if err := decoder.Decode(¶ms); err != nil {
h.httpError(rw, "error parsing query parameters: "+err.Error(), http.StatusBadRequest)
return
}
// Convert json.Number into int64 and float64 values
for k, v := range params {
if v, ok := v.(json.Number); ok {
var err error
if strings.Contains(string(v), ".") {
params[k], err = v.Float64()
} else {
params[k], err = v.Int64()
}
if err != nil {
h.httpError(rw, "error parsing json value: "+err.Error(), http.StatusBadRequest)
return
}
}
}
p.SetParams(params)
}
// Parse query from query string.
query, err := p.ParseQuery()
if err != nil {
h.httpError(rw, "error parsing query: "+err.Error(), http.StatusBadRequest)
return
}
// Check authorization.
if h.Config.AuthEnabled {
if err := h.QueryAuthorizer.AuthorizeQuery(user, query, db); err != nil {
if err, ok := err.(meta.ErrAuthorize); ok {
h.Logger.Printf("Unauthorized request | user: %q | query: %q | database %q\n", err.User, err.Query.String(), err.Database)
}
h.httpError(rw, "error authorizing query: "+err.Error(), http.StatusForbidden)
return
}
}
// Parse chunk size. Use default if not provided or unparsable.
chunked := r.FormValue("chunked") == "true"
chunkSize := DefaultChunkSize
if chunked {
if n, err := strconv.ParseInt(r.FormValue("chunk_size"), 10, 64); err == nil && int(n) > 0 {
chunkSize = int(n)
}
}
// Parse whether this is an async command.
async := r.FormValue("async") == "true"
// Make sure if the client disconnects we signal the query to abort
var closing chan struct{}
if !async {
closing = make(chan struct{})
if notifier, ok := w.(http.CloseNotifier); ok {
// CloseNotify() is not guaranteed to send a notification when the query
// is closed. Use this channel to signal that the query is finished to
// prevent lingering goroutines that may be stuck.
done := make(chan struct{})
defer close(done)
notify := notifier.CloseNotify()
go func() {
// Wait for either the request to finish
// or for the client to disconnect
select {
case <-done:
case <-notify:
close(closing)
}
}()
} else {
defer close(closing)
}
}
// Execute query.
rw.Header().Add("Connection", "close")
results := h.QueryExecutor.ExecuteQuery(query, influxql.ExecutionOptions{
Database: db,
ChunkSize: chunkSize,
ReadOnly: r.Method == "GET",
NodeID: nodeID,
}, closing)
// If we are running in async mode, open a goroutine to drain the results
// and return with a StatusNoContent.
if async {
go h.async(query, results)
h.writeHeader(w, http.StatusNoContent)
return
}
// if we're not chunking, this will be the in memory buffer for all results before sending to client
resp := Response{Results: make([]*influxql.Result, 0)}
// Status header is OK once this point is reached.
// Attempt to flush the header immediately so the client gets the header information
// and knows the query was accepted.
h.writeHeader(rw, http.StatusOK)
if w, ok := w.(http.Flusher); ok {
w.Flush()
}
// pull all results from the channel
rows := 0
for r := range results {
// Ignore nil results.
if r == nil {
continue
}
// if requested, convert result timestamps to epoch
if epoch != "" {
convertToEpoch(r, epoch)
}
// Write out result immediately if chunked.
if chunked {
n, _ := rw.WriteResponse(Response{
Results: []*influxql.Result{r},
})
atomic.AddInt64(&h.stats.QueryRequestBytesTransmitted, int64(n))
w.(http.Flusher).Flush()
continue
}
// Limit the number of rows that can be returned in a non-chunked response.
// This is to prevent the server from going OOM when returning a large response.
// If you want to return more than the default chunk size, then use chunking
// to process multiple blobs.
rows += len(r.Series)
if h.Config.MaxRowLimit > 0 && rows > h.Config.MaxRowLimit {
break
}
// It's not chunked so buffer results in memory.
// Results for statements need to be combined together.
// We need to check if this new result is for the same statement as
// the last result, or for the next statement
l := len(resp.Results)
if l == 0 {
resp.Results = append(resp.Results, r)
} else if resp.Results[l-1].StatementID == r.StatementID {
if r.Err != nil {
resp.Results[l-1] = r
continue
}
cr := resp.Results[l-1]
rowsMerged := 0
if len(cr.Series) > 0 {
lastSeries := cr.Series[len(cr.Series)-1]
for _, row := range r.Series {
if !lastSeries.SameSeries(row) {
// Next row is for a different series than last.
break
}
// Values are for the same series, so append them.
lastSeries.Values = append(lastSeries.Values, row.Values...)
rowsMerged++
}
}
// Append remaining rows as new rows.
r.Series = r.Series[rowsMerged:]
cr.Series = append(cr.Series, r.Series...)
cr.Messages = append(cr.Messages, r.Messages...)
} else {
resp.Results = append(resp.Results, r)
}
}
// If it's not chunked we buffered everything in memory, so write it out
if !chunked {
n, _ := rw.WriteResponse(resp)
atomic.AddInt64(&h.stats.QueryRequestBytesTransmitted, int64(n))
}
}
func handler(w http.ResponseWriter, req *http.Request) {
defer func() {
r := recover()
if r != nil {
w.Header().Set("Content-Type", "text/plain")
Fprintf(w, "%v", r)
}
}()
req.ParseForm()
if f4, ok4 := req.Form["list"]; ok4 {
what := f4[0]
if what == "" {
// List all files
names, err := filepath.Glob("*.bas")
if err != nil {
panic(err)
}
sort.Strings(names)
w.Header().Set("Content-Type", "text/html")
Fprintf(w, "<html><body>")
for _, name := range names {
Fprintf(w, `<a href="/?list=%s">%s</a><br>`+"\n", name, name)
}
} else {
// List one file
fd, err := os.Open(what)
if err != nil {
panic(err)
}
w.Header().Set("Content-Type", "text/plain")
_, err = io.Copy(w, fd)
if err != nil {
panic(err)
}
err = fd.Close()
if err != nil {
panic(err)
}
}
} else if f1, ok1 := req.Form["run"]; ok1 {
var putchar func(ch byte)
forward_putchar := func(ch byte) {
putchar(ch)
}
terp := NewTerp(f1[0], forward_putchar)
terp.SetExpiration("30s")
d := draw.Register(terp)
putchar = d.Putchar
if f3, ok3 := req.Form["progname"]; ok3 {
name := f3[0]
if name == "" {
name = "untitled"
}
name = strings.Trim(name, " \t\r\n")
flags := os.O_CREATE | os.O_WRONLY | os.O_APPEND
if strings.HasSuffix(name, "!") {
flags |= os.O_EXCL
}
fd, err := os.OpenFile(CurlyEncode(name)+".bas", flags, 0666)
if err != nil {
panic(err)
}
w := bufio.NewWriter(fd)
Fprintf(w, "###### ###### ###### ###### ###### ######\n")
Fprintf(w, "%s\n", strings.Replace(f1[0], "\r", "", -1))
w.Flush()
fd.Close()
}
terp.Run()
if d.HasImage() {
w.Header().Set("Content-Type", "image/png")
d.WritePng(w)
} else {
w.Header().Set("Content-Type", "text/plain")
Fprintf(w, "Use 'PRINT' or 'CALL triangle' statements to produce output.")
}
} else {
dict := make(map[string]interface{})
if f2, ok2 := req.Form["load"]; ok2 {
code, err := ioutil.ReadFile(strings.Trim(f2[0], " \t\n\r"))
s := "\n" + string(code)
if err != nil {
panic(err)
}
m := THRU_CRUNCH.FindStringSubmatch(s)
if m != nil {
s = m[1]
}
dict["Code"] = s
} else {
dict["Code"] = template.HTML(DEMO)
}
{
names, err := filepath.Glob("*{33}.bas")
if err != nil {
panic(err)
}
for i, e := range names {
names[i] = e[:len(e)-8] // Chop "{33}.bas"
}
sort.Strings(names)
dict["Links"] = names
}
Tmpl.ExecuteTemplate(w, "Main", dict)
}
}