func (u *Upstream) FilterRequest(request *falcore.Request) (res *http.Response) {
var err error
req := request.HttpRequest
// Force the upstream to use http
if u.ForceHttp || req.URL.Scheme == "" {
req.URL.Scheme = "http"
req.URL.Host = req.Host
}
before := time.Now()
req.Header.Set("Connection", "Keep-Alive")
if u.tcpconn != nil {
u.tcpconn.SetDeadline(time.Now().Add(u.Timeout))
}
res, err = u.transport.RoundTrip(req)
diff := falcore.TimeDiff(before, time.Now())
if err != nil {
if nerr, ok := err.(net.Error); ok && nerr.Timeout() {
falcore.Error("%s Upstream Timeout error: %v", request.ID, err)
res = falcore.SimpleResponse(req, 504, nil, "Gateway Timeout\n")
request.CurrentStage.Status = 2 // Fail
} else {
falcore.Error("%s Upstream error: %v", request.ID, err)
res = falcore.SimpleResponse(req, 502, nil, "Bad Gateway\n")
request.CurrentStage.Status = 2 // Fail
}
}
falcore.Debug("%s [%s] [%s] %s s=%d Time=%.4f", request.ID, req.Method, u.host, req.URL, res.StatusCode, diff)
return
}
func (u *Upstream) ping() (up bool, ok bool) {
if u.PingPath != "" {
// the url must be syntactically valid for this to work but the host will be ignored because we
// are overriding the connection always
request, err := http.NewRequest("GET", "http://localhost"+u.PingPath, nil)
request.Header.Set("Connection", "Keep-Alive") // not sure if this should be here for a ping
if err != nil {
falcore.Error("Bad Ping request: %v", err)
return false, true
}
if u.tcpconn != nil {
u.tcpconn.SetDeadline(time.Now().Add(u.Timeout))
}
res, err := u.transport.RoundTrip(request)
if err != nil {
falcore.Error("Failed Ping to %v:%v: %v", u.Host, u.Port, err)
return false, true
} else {
res.Body.Close()
}
if res.StatusCode == 200 {
return true, true
}
falcore.Error("Failed Ping to %v:%v: %v", u.Host, u.Port, res.Status)
// bad status
return false, true
}
return false, false
}
// The config consists of a map of the servers in the pool in the format host_or_ip:port
// where port is optional and defaults to 80. The map value is an int with the weight
// only 0 and 1 are supported weights (0 disables a server and 1 enables it)
func NewUpstreamPool(name string, config []UpstreamEntryConfig) *UpstreamPool {
up := new(UpstreamPool)
up.pool = make([]*UpstreamEntry, len(config))
up.Name = name
up.nextUpstream = make(chan *UpstreamEntry)
up.weightMutex = new(sync.RWMutex)
up.shutdown = make(chan int)
up.pinger = time.NewTicker(3e9) // 3s
// create the pool
for i, uec := range config {
parts := strings.Split(uec.HostPort, ":")
upstreamHost := parts[0]
upstreamPort := 80
if len(parts) > 1 {
var err error
upstreamPort, err = strconv.Atoi(parts[1])
if err != nil {
upstreamPort = 80
falcore.Error("UpstreamPool Error converting port to int for", upstreamHost, ":", err)
}
}
ups := NewUpstream(upstreamHost, upstreamPort, uec.ForceHttp)
ups.PingPath = uec.PingPath
ue := new(UpstreamEntry)
ue.Upstream = ups
ue.Weight = uec.Weight
up.pool[i] = ue
}
go up.nextServer()
go up.pingUpstreams()
return up
}
func (f *Filter) FilterRequest(req *falcore.Request) (res *http.Response) {
// Clean asset path
asset_path := filepath.Clean(filepath.FromSlash(req.HttpRequest.URL.Path))
// Resolve PathPrefix
if strings.HasPrefix(asset_path, f.PathPrefix) {
asset_path = asset_path[len(f.PathPrefix):]
} else {
falcore.Debug("%v doesn't match prefix %v", asset_path, f.PathPrefix)
res = falcore.SimpleResponse(req.HttpRequest, 404, nil, "Not found.")
return
}
// Resolve FSBase
if f.BasePath != "" {
asset_path = filepath.Join(f.BasePath, asset_path)
} else {
falcore.Error("file_filter requires a BasePath")
return falcore.SimpleResponse(req.HttpRequest, 500, nil, "Server Error\n")
}
// Open File
if file, err := os.Open(asset_path); err == nil {
// Make sure it's an actual file
if stat, err := file.Stat(); err == nil && stat.Mode()&os.ModeType == 0 {
res = &http.Response{
Request: req.HttpRequest,
StatusCode: 200,
Proto: "HTTP/1.1",
ProtoMajor: 1,
ProtoMinor: 1,
Body: file,
Header: make(http.Header),
ContentLength: stat.Size(),
}
if ct := mime.TypeByExtension(filepath.Ext(asset_path)); ct != "" {
res.Header.Set("Content-Type", ct)
}
} else {
file.Close()
return falcore.SimpleResponse(req.HttpRequest, 404, nil, "File not found\n")
}
} else {
falcore.Debug("Can't open %v: %v", asset_path, err)
res = falcore.SimpleResponse(req.HttpRequest, 404, nil, "File not found\n")
}
return
}
func NewUpstream(host string, port int, forceHttp bool, rewriteHost bool) *Upstream {
u := new(Upstream)
u.Host = host
u.Port = port
u.ForceHttp = forceHttp
u.RewriteHost = rewriteHost
ips, err := net.LookupIP(host)
var ip net.IP = nil
for i := range ips {
ip = ips[i].To4()
if ip != nil {
break
}
}
if err == nil && ip != nil {
u.tcpaddr = new(net.TCPAddr)
u.tcpaddr.Port = port
u.tcpaddr.IP = ip
} else {
falcore.Warn("Can't get IP addr for %v: %v", host, err)
}
u.Timeout = 60e9
u.host = fmt.Sprintf("%v:%v", u.Host, u.Port)
u.transport = new(http.Transport)
u.transport.Dial = func(n, addr string) (c net.Conn, err error) {
falcore.Fine("Dialing connection to %v", u.tcpaddr)
var ctcp *net.TCPConn
ctcp, err = net.DialTCP("tcp4", nil, u.tcpaddr)
if ctcp != nil {
u.tcpconn = ctcp
u.tcpconn.SetDeadline(time.Now().Add(u.Timeout))
}
if err != nil {
falcore.Error("Dial Failed: %v", err)
}
return ctcp, err
}
u.transport.MaxIdleConnsPerHost = 15
return u
}
func NewUpstream(host string, port int, forceHttp bool) *Upstream {
u := new(Upstream)
u.Host = host
u.Port = port
u.ForceHttp = forceHttp
ips, err := net.LookupIP(host)
var ip net.IP = nil
for i := range ips {
ip = ips[i].To4()
if ip != nil {
break
}
}
if err == nil && ip != nil {
u.tcpaddr = &net.TCPAddr{}
u.tcpaddr.Port = port
u.tcpaddr.IP = ip
} else {
falcore.Warn("Can't get IP addr for %v: %v", host, err)
}
u.Timeout = 60 * time.Second
u.host = fmt.Sprintf("%v:%v", u.Host, u.Port)
u.transport = &http.Transport{}
// This dial ignores the addr passed in and dials based on the upstream host and port
u.transport.Dial = func(n, addr string) (c net.Conn, err error) {
falcore.Fine("Dialing connection to %v", u.tcpaddr)
var ctcp *net.TCPConn
ctcp, err = net.DialTCP("tcp4", nil, u.tcpaddr)
if err != nil {
falcore.Error("Dial Failed: %v", err)
return
}
c = &connWrapper{conn: ctcp, timeout: u.Timeout}
return
}
u.transport.MaxIdleConnsPerHost = 15
return u
}
func (u *Upstream) FilterRequest(request *falcore.Request) (res *http.Response) {
var err error
req := request.HttpRequest
// Force the upstream to use http
if u.ForceHttp || req.URL.Scheme == "" {
req.URL.Scheme = "http"
req.URL.Host = req.Host
}
before := time.Now()
req.Header.Set("Connection", "Keep-Alive")
if u.tcpconn != nil {
u.tcpconn.SetDeadline(time.Now().Add(u.Timeout))
}
var upstrRes *http.Response
upstrRes, err = u.transport.RoundTrip(req)
diff := falcore.TimeDiff(before, time.Now())
if err == nil {
// Copy response over to new record. Remove connection noise. Add some sanity.
res = falcore.SimpleResponse(req, upstrRes.StatusCode, nil, "")
if upstrRes.ContentLength > 0 && upstrRes.Body != nil {
res.ContentLength = upstrRes.ContentLength
res.Body = upstrRes.Body
} else if upstrRes.ContentLength == 0 && upstrRes.Body != nil {
// Any bytes?
var testBuf [1]byte
n, _ := io.ReadFull(upstrRes.Body, testBuf[:])
if n == 1 {
// Yes there are. Chunked it is.
res.TransferEncoding = []string{"chunked"}
res.ContentLength = -1
rc := &passThruReadCloser{
io.MultiReader(bytes.NewBuffer(testBuf[:]), upstrRes.Body),
upstrRes.Body,
}
res.Body = rc
}
} else if upstrRes.Body != nil {
res.Body = upstrRes.Body
res.ContentLength = -1
res.TransferEncoding = []string{"chunked"}
}
// Copy over headers with a few exceptions
res.Header = make(http.Header)
for hn, hv := range upstrRes.Header {
switch hn {
case "Content-Length":
case "Connection":
case "Transfer-Encoding":
default:
res.Header[hn] = hv
}
}
} else {
if nerr, ok := err.(net.Error); ok && nerr.Timeout() {
falcore.Error("%s Upstream Timeout error: %v", request.ID, err)
res = falcore.SimpleResponse(req, 504, nil, "Gateway Timeout\n")
request.CurrentStage.Status = 2 // Fail
} else {
falcore.Error("%s Upstream error: %v", request.ID, err)
res = falcore.SimpleResponse(req, 502, nil, "Bad Gateway\n")
request.CurrentStage.Status = 2 // Fail
}
}
falcore.Debug("%s [%s] [%s] %s s=%d Time=%.4f", request.ID, req.Method, u.host, req.URL, res.StatusCode, diff)
return
}
func (f *Filter) FilterRequest(req *falcore.Request) (res *http.Response) {
// Clean asset path
asset_path := filepath.Clean(filepath.FromSlash(req.HttpRequest.URL.Path))
if filepath.Ext(asset_path) != ".css" {
return
}
// Resolve PathPrefix
if strings.HasPrefix(asset_path, f.PathPrefix) {
asset_path = asset_path[len(f.PathPrefix):]
} else {
falcore.Debug("%v doesn't match prefix %v", asset_path, f.PathPrefix)
res = falcore.SimpleResponse(req.HttpRequest, 404, nil, "Not found.")
return
}
// Resolve FSBase
if f.BasePath != "" {
asset_path = filepath.Join(f.BasePath, asset_path)
} else {
falcore.Error("file_filter requires a BasePath")
return falcore.SimpleResponse(req.HttpRequest, 500, nil, "Server Error\n")
}
scss_asset_path := strings.Replace(asset_path, ".css", ".scss", -1)
sass_asset_path := strings.Replace(asset_path, ".css", ".sass", -1)
if _, err := os.Stat(scss_asset_path); err == nil {
asset_path = scss_asset_path
} else if _, err := os.Stat(sass_asset_path); err == nil {
asset_path = sass_asset_path
} else {
return
}
if file, err := os.Open(asset_path); err == nil {
// Make sure it's an actual file
if stat, err := file.Stat(); err == nil && stat.Mode()&os.ModeType == 0 {
cmd := exec.Command("sass", "--scss", asset_path)
var out bytes.Buffer
cmd.Stdout = &out
err = cmd.Run()
if err != nil {
falcore.Error("Can't compile SCSS file : %v", asset_path)
return
}
css := out.String()
res = &http.Response{
Request: req.HttpRequest,
StatusCode: 200,
Proto: "HTTP/1.1",
ProtoMajor: 1,
ProtoMinor: 1,
Body: ioutil.NopCloser(bytes.NewBufferString(css)),
Header: make(http.Header),
ContentLength: int64(len(css)),
}
res.Header.Set("Content-Type", mime.TypeByExtension(".css"))
// css, err := sc.CompileFile(asset_path)
// if err != nil {
// falcore.Error("%v", err)
// return
// }
// res = &http.Response{
// Request: req.HttpRequest,
// StatusCode: 200,
// Proto: "HTTP/1.1",
// ProtoMajor: 1,
// ProtoMinor: 1,
// Body: ioutil.NopCloser(bytes.NewBufferString(css)),
// Header: make(http.Header),
// ContentLength: int64(len(css)),
// }
// res.Header.Set("Content-Type", mime.TypeByExtension(".css"))
} else {
file.Close()
}
} else {
falcore.Finest("Can't open %v: %v", asset_path, err)
}
return
}
func (c *Filter) FilterResponse(request *falcore.Request, res *http.Response) {
req := request.HttpRequest
if accept := req.Header.Get("Accept-Encoding"); accept != "" {
// Is content an acceptable type for encoding?
var compress = false
var content_type = res.Header.Get("Content-Type")
for _, t := range c.types {
if content_type == t {
compress = true
break
}
}
// Is the content already compressed
if res.Header.Get("Content-Encoding") != "" {
compress = false
}
if !compress {
request.CurrentStage.Status = 1 // Skip
return
}
// Figure out which encoding to use
options := strings.Split(accept, ",")
var mode string
for _, opt := range options {
if m := strings.TrimSpace(opt); m == "gzip" || m == "deflate" {
mode = m
break
}
}
var compressor io.WriteCloser
var buf = bytes.NewBuffer(make([]byte, 0, 1024))
switch mode {
case "gzip":
compressor = gzip.NewWriter(buf)
case "deflate":
comp, err := flate.NewWriter(buf, -1)
if err != nil {
falcore.Error("Compression Error: %v", err)
request.CurrentStage.Status = 1 // Skip
return
}
compressor = comp
default:
request.CurrentStage.Status = 1 // Skip
return
}
// Perform compression
r := make([]byte, 1024)
var err error
var i int
for err == nil {
i, err = res.Body.Read(r)
compressor.Write(r[0:i])
}
compressor.Close()
res.Body.Close()
res.ContentLength = int64(buf.Len())
res.Body = (*filteredBody)(buf)
res.Header.Set("Content-Encoding", mode)
} else {
request.CurrentStage.Status = 1 // Skip
}
}