diff options
Diffstat (limited to 'plugins/http')
-rw-r--r-- | plugins/http/attributes/attributes.go | 85 | ||||
-rw-r--r-- | plugins/http/config.go | 294 | ||||
-rw-r--r-- | plugins/http/constants.go | 8 | ||||
-rw-r--r-- | plugins/http/errors.go | 25 | ||||
-rw-r--r-- | plugins/http/errors_windows.go | 27 | ||||
-rw-r--r-- | plugins/http/handler.go | 237 | ||||
-rw-r--r-- | plugins/http/parse.go | 147 | ||||
-rw-r--r-- | plugins/http/plugin.go | 532 | ||||
-rw-r--r-- | plugins/http/request.go | 186 | ||||
-rw-r--r-- | plugins/http/response.go | 105 | ||||
-rw-r--r-- | plugins/http/uploads.go | 158 | ||||
-rw-r--r-- | plugins/http/uploads_config.go | 46 |
12 files changed, 1850 insertions, 0 deletions
diff --git a/plugins/http/attributes/attributes.go b/plugins/http/attributes/attributes.go new file mode 100644 index 00000000..4c453766 --- /dev/null +++ b/plugins/http/attributes/attributes.go @@ -0,0 +1,85 @@ +package attributes + +import ( + "context" + "errors" + "net/http" +) + +// contextKey is a value for use with context.WithValue. It's used as +// a pointer so it fits in an interface{} without allocation. +type contextKey struct { + name string +} + +func (k *contextKey) String() string { return k.name } + +var ( + // PsrContextKey is a context key. It can be used in the http attributes + PsrContextKey = &contextKey{"psr_attributes"} +) + +type attrs map[string]interface{} + +func (v attrs) get(key string) interface{} { + if v == nil { + return "" + } + + return v[key] +} + +func (v attrs) set(key string, value interface{}) { + v[key] = value +} + +func (v attrs) del(key string) { + delete(v, key) +} + +// Init returns request with new context and attribute bag. +func Init(r *http.Request) *http.Request { + return r.WithContext(context.WithValue(r.Context(), PsrContextKey, attrs{})) +} + +// All returns all context attributes. +func All(r *http.Request) map[string]interface{} { + v := r.Context().Value(PsrContextKey) + if v == nil { + return attrs{} + } + + return v.(attrs) +} + +// Get gets the value from request context. It replaces any existing +// values. +func Get(r *http.Request, key string) interface{} { + v := r.Context().Value(PsrContextKey) + if v == nil { + return nil + } + + return v.(attrs).get(key) +} + +// Set sets the key to value. It replaces any existing +// values. Context specific. +func Set(r *http.Request, key string, value interface{}) error { + v := r.Context().Value(PsrContextKey) + if v == nil { + return errors.New("unable to find `psr:attributes` context key") + } + + v.(attrs).set(key, value) + return nil +} + +// Delete deletes values associated with attribute key. +func (v attrs) Delete(key string) { + if v == nil { + return + } + + v.del(key) +} diff --git a/plugins/http/config.go b/plugins/http/config.go new file mode 100644 index 00000000..abde8917 --- /dev/null +++ b/plugins/http/config.go @@ -0,0 +1,294 @@ +package http + +import ( + "net" + "os" + "runtime" + "strings" + "time" + + "github.com/spiral/errors" + poolImpl "github.com/spiral/roadrunner/v2/pkg/pool" +) + +// Cidrs is a slice of IPNet addresses +type Cidrs []*net.IPNet + +// IsTrusted checks if the ip address exists in the provided in the config addresses +func (c *Cidrs) IsTrusted(ip string) bool { + if len(*c) == 0 { + return false + } + + i := net.ParseIP(ip) + if i == nil { + return false + } + + for _, cird := range *c { + if cird.Contains(i) { + return true + } + } + + return false +} + +// Config configures RoadRunner HTTP server. +type Config struct { + // Port and port to handle as http server. + Address string + + // SSL defines https server options. + SSL *SSLConfig + + // FCGI configuration. You can use FastCGI without HTTP server. + FCGI *FCGIConfig + + // HTTP2 configuration + HTTP2 *HTTP2Config + + // MaxRequestSize specified max size for payload body in megabytes, set 0 to unlimited. + MaxRequestSize uint64 `yaml:"max_request_size"` + + // TrustedSubnets declare IP subnets which are allowed to set ip using X-Real-Ip and X-Forwarded-For + TrustedSubnets []string `yaml:"trusted_subnets"` + + // Uploads configures uploads configuration. + Uploads *UploadsConfig + + // Pool configures worker pool. + Pool *poolImpl.Config + + // Env is environment variables passed to the http pool + Env map[string]string + + // List of the middleware names (order will be preserved) + Middleware []string + + // slice of net.IPNet + cidrs Cidrs +} + +// FCGIConfig for FastCGI server. +type FCGIConfig struct { + // Address and port to handle as http server. + Address string +} + +// HTTP2Config HTTP/2 server customizations. +type HTTP2Config struct { + // Enable or disable HTTP/2 extension, default enable. + Enabled bool + + // H2C enables HTTP/2 over TCP + H2C bool + + // MaxConcurrentStreams defaults to 128. + MaxConcurrentStreams uint32 `yaml:"max_concurrent_streams"` +} + +// InitDefaults sets default values for HTTP/2 configuration. +func (cfg *HTTP2Config) InitDefaults() error { + cfg.Enabled = true + cfg.MaxConcurrentStreams = 128 + + return nil +} + +// SSLConfig defines https server configuration. +type SSLConfig struct { + // Port to listen as HTTPS server, defaults to 443. + Port int + + // Redirect when enabled forces all http connections to switch to https. + Redirect bool + + // Key defined private server key. + Key string + + // Cert is https certificate. + Cert string + + // Root CA file + RootCA string +} + +// EnableHTTP is true when http server must run. +func (c *Config) EnableHTTP() bool { + return c.Address != "" +} + +// EnableTLS returns true if pool must listen TLS connections. +func (c *Config) EnableTLS() bool { + return c.SSL.Key != "" || c.SSL.Cert != "" || c.SSL.RootCA != "" +} + +// EnableHTTP2 when HTTP/2 extension must be enabled (only with TSL). +func (c *Config) EnableHTTP2() bool { + return c.HTTP2.Enabled +} + +// EnableH2C when HTTP/2 extension must be enabled on TCP. +func (c *Config) EnableH2C() bool { + return c.HTTP2.H2C +} + +// EnableFCGI is true when FastCGI server must be enabled. +func (c *Config) EnableFCGI() bool { + return c.FCGI.Address != "" +} + +// InitDefaults must populate Config values using given Config source. Must return error if Config is not valid. +func (c *Config) InitDefaults() error { + if c.Pool == nil { + // default pool + c.Pool = &poolImpl.Config{ + Debug: false, + NumWorkers: int64(runtime.NumCPU()), + MaxJobs: 1000, + AllocateTimeout: time.Second * 60, + DestroyTimeout: time.Second * 60, + Supervisor: nil, + } + } + + if c.HTTP2 == nil { + c.HTTP2 = &HTTP2Config{} + } + + if c.FCGI == nil { + c.FCGI = &FCGIConfig{} + } + + if c.Uploads == nil { + c.Uploads = &UploadsConfig{} + } + + if c.SSL == nil { + c.SSL = &SSLConfig{} + } + + if c.SSL.Port == 0 { + c.SSL.Port = 443 + } + + err := c.HTTP2.InitDefaults() + if err != nil { + return err + } + err = c.Uploads.InitDefaults() + if err != nil { + return err + } + + if c.TrustedSubnets == nil { + // @see https://en.wikipedia.org/wiki/Reserved_IP_addresses + c.TrustedSubnets = []string{ + "10.0.0.0/8", + "127.0.0.0/8", + "172.16.0.0/12", + "192.168.0.0/16", + "::1/128", + "fc00::/7", + "fe80::/10", + } + } + + cidrs, err := ParseCIDRs(c.TrustedSubnets) + if err != nil { + return err + } + c.cidrs = cidrs + + return c.Valid() +} + +// ParseCIDRs parse IPNet addresses and return slice of its +func ParseCIDRs(subnets []string) (Cidrs, error) { + c := make(Cidrs, 0, len(subnets)) + for _, cidr := range subnets { + _, cr, err := net.ParseCIDR(cidr) + if err != nil { + return nil, err + } + + c = append(c, cr) + } + + return c, nil +} + +// IsTrusted if api can be trusted to use X-Real-Ip, X-Forwarded-For +func (c *Config) IsTrusted(ip string) bool { + if c.cidrs == nil { + return false + } + + i := net.ParseIP(ip) + if i == nil { + return false + } + + for _, cird := range c.cidrs { + if cird.Contains(i) { + return true + } + } + + return false +} + +// Valid validates the configuration. +func (c *Config) Valid() error { + const op = errors.Op("validation") + if c.Uploads == nil { + return errors.E(op, errors.Str("malformed uploads config")) + } + + if c.HTTP2 == nil { + return errors.E(op, errors.Str("malformed http2 config")) + } + + if c.Pool == nil { + return errors.E(op, "malformed pool config") + } + + if !c.EnableHTTP() && !c.EnableTLS() && !c.EnableFCGI() { + return errors.E(op, errors.Str("unable to run http service, no method has been specified (http, https, http/2 or FastCGI)")) + } + + if c.Address != "" && !strings.Contains(c.Address, ":") { + return errors.E(op, errors.Str("malformed http server address")) + } + + if c.EnableTLS() { + if _, err := os.Stat(c.SSL.Key); err != nil { + if os.IsNotExist(err) { + return errors.E(op, errors.Errorf("key file '%s' does not exists", c.SSL.Key)) + } + + return err + } + + if _, err := os.Stat(c.SSL.Cert); err != nil { + if os.IsNotExist(err) { + return errors.E(op, errors.Errorf("cert file '%s' does not exists", c.SSL.Cert)) + } + + return err + } + + // RootCA is optional, but if provided - check it + if c.SSL.RootCA != "" { + if _, err := os.Stat(c.SSL.RootCA); err != nil { + if os.IsNotExist(err) { + return errors.E(op, errors.Errorf("root ca path provided, but path '%s' does not exists", c.SSL.RootCA)) + } + return err + } + } + } + + return nil +} diff --git a/plugins/http/constants.go b/plugins/http/constants.go new file mode 100644 index 00000000..c3d5c589 --- /dev/null +++ b/plugins/http/constants.go @@ -0,0 +1,8 @@ +package http + +import "net/http" + +var http2pushHeaderKey = http.CanonicalHeaderKey("http2-push") + +// TrailerHeaderKey http header key +var TrailerHeaderKey = http.CanonicalHeaderKey("trailer") diff --git a/plugins/http/errors.go b/plugins/http/errors.go new file mode 100644 index 00000000..fb8762ef --- /dev/null +++ b/plugins/http/errors.go @@ -0,0 +1,25 @@ +// +build !windows + +package http + +import ( + "errors" + "net" + "os" + "syscall" +) + +// Broken pipe +var errEPIPE = errors.New("EPIPE(32) -> connection reset by peer") + +// handleWriteError just check if error was caused by aborted connection on linux +func handleWriteError(err error) error { + if netErr, ok2 := err.(*net.OpError); ok2 { + if syscallErr, ok3 := netErr.Err.(*os.SyscallError); ok3 { + if syscallErr.Err == syscall.EPIPE { + return errEPIPE + } + } + } + return err +} diff --git a/plugins/http/errors_windows.go b/plugins/http/errors_windows.go new file mode 100644 index 00000000..3d0ba04c --- /dev/null +++ b/plugins/http/errors_windows.go @@ -0,0 +1,27 @@ +// +build windows + +package http + +import ( + "errors" + "net" + "os" + "syscall" +) + +//Software caused connection abort. +//An established connection was aborted by the software in your host computer, +//possibly due to a data transmission time-out or protocol error. +var errEPIPE = errors.New("WSAECONNABORTED (10053) -> an established connection was aborted by peer") + +// handleWriteError just check if error was caused by aborted connection on windows +func handleWriteError(err error) error { + if netErr, ok2 := err.(*net.OpError); ok2 { + if syscallErr, ok3 := netErr.Err.(*os.SyscallError); ok3 { + if syscallErr.Err == syscall.WSAECONNABORTED { + return errEPIPE + } + } + } + return err +} diff --git a/plugins/http/handler.go b/plugins/http/handler.go new file mode 100644 index 00000000..9c40cdfc --- /dev/null +++ b/plugins/http/handler.go @@ -0,0 +1,237 @@ +package http + +import ( + "net" + "net/http" + "strconv" + "strings" + "sync" + "time" + + "github.com/hashicorp/go-multierror" + "github.com/spiral/errors" + "github.com/spiral/roadrunner/v2/interfaces/events" + "github.com/spiral/roadrunner/v2/interfaces/pool" + "github.com/spiral/roadrunner/v2/plugins/logger" +) + +const ( + // EventResponse thrown after the request been processed. See ErrorEvent as payload. + EventResponse = iota + 500 + + // EventError thrown on any non job error provided by road runner server. + EventError +) + +// MB is 1024 bytes +const MB = 1024 * 1024 + +// ErrorEvent represents singular http error event. +type ErrorEvent struct { + // Request contains client request, must not be stored. + Request *http.Request + + // Error - associated error, if any. + Error error + + // event timings + start time.Time + elapsed time.Duration +} + +// Elapsed returns duration of the invocation. +func (e *ErrorEvent) Elapsed() time.Duration { + return e.elapsed +} + +// ResponseEvent represents singular http response event. +type ResponseEvent struct { + // Request contains client request, must not be stored. + Request *Request + + // Response contains service response. + Response *Response + + // event timings + start time.Time + elapsed time.Duration +} + +// Elapsed returns duration of the invocation. +func (e *ResponseEvent) Elapsed() time.Duration { + return e.elapsed +} + +// Handler serves http connections to underlying PHP application using PSR-7 protocol. Context will include request headers, +// parsed files and query, payload will include parsed form dataTree (if any). +type Handler struct { + maxRequestSize uint64 + uploads UploadsConfig + trusted Cidrs + log logger.Logger + pool pool.Pool + mul sync.Mutex + lsn events.Listener +} + +// NewHandler return handle interface implementation +func NewHandler(maxReqSize uint64, uploads UploadsConfig, trusted Cidrs, pool pool.Pool) (*Handler, error) { + if pool == nil { + return nil, errors.E(errors.Str("pool should be initialized")) + } + return &Handler{ + maxRequestSize: maxReqSize * MB, + uploads: uploads, + pool: pool, + trusted: trusted, + }, nil +} + +// AddListener attaches handler event controller. +func (h *Handler) AddListener(l events.Listener) { + h.mul.Lock() + defer h.mul.Unlock() + + h.lsn = l +} + +// mdwr serve using PSR-7 requests passed to underlying application. Attempts to serve static files first if enabled. +func (h *Handler) ServeHTTP(w http.ResponseWriter, r *http.Request) { + const op = errors.Op("ServeHTTP") + start := time.Now() + + // validating request size + if h.maxRequestSize != 0 { + err := h.maxSize(w, r, start, op) + if err != nil { + return + } + } + + req, err := NewRequest(r, h.uploads) + if err != nil { + h.handleError(w, r, err, start) + return + } + + // proxy IP resolution + h.resolveIP(req) + + req.Open(h.log) + defer req.Close(h.log) + + p, err := req.Payload() + if err != nil { + h.handleError(w, r, err, start) + return + } + + rsp, err := h.pool.Exec(p) + if err != nil { + h.handleError(w, r, err, start) + return + } + + resp, err := NewResponse(rsp) + if err != nil { + h.handleError(w, r, err, start) + return + } + + h.handleResponse(req, resp, start) + err = resp.Write(w) + if err != nil { + h.handleError(w, r, err, start) + } +} + +func (h *Handler) maxSize(w http.ResponseWriter, r *http.Request, start time.Time, op errors.Op) error { + if length := r.Header.Get("content-length"); length != "" { + if size, err := strconv.ParseInt(length, 10, 64); err != nil { + h.handleError(w, r, err, start) + return err + } else if size > int64(h.maxRequestSize) { + h.handleError(w, r, errors.E(op, errors.Str("request body max size is exceeded")), start) + return err + } + } + return nil +} + +// handleError sends error. +func (h *Handler) handleError(w http.ResponseWriter, r *http.Request, err error, start time.Time) { + h.mul.Lock() + defer h.mul.Unlock() + // if pipe is broken, there is no sense to write the header + // in this case we just report about error + if err == errEPIPE { + h.throw(ErrorEvent{Request: r, Error: err, start: start, elapsed: time.Since(start)}) + return + } + err = multierror.Append(err) + // ResponseWriter is ok, write the error code + w.WriteHeader(500) + _, err2 := w.Write([]byte(err.Error())) + // error during the writing to the ResponseWriter + if err2 != nil { + err = multierror.Append(err2, err) + // concat original error with ResponseWriter error + h.throw(ErrorEvent{Request: r, Error: errors.E(err), start: start, elapsed: time.Since(start)}) + return + } + h.throw(ErrorEvent{Request: r, Error: err, start: start, elapsed: time.Since(start)}) +} + +// handleResponse triggers response event. +func (h *Handler) handleResponse(req *Request, resp *Response, start time.Time) { + h.throw(ResponseEvent{Request: req, Response: resp, start: start, elapsed: time.Since(start)}) +} + +// throw invokes event handler if any. +func (h *Handler) throw(event interface{}) { + if h.lsn != nil { + h.lsn(event) + } +} + +// get real ip passing multiple proxy +func (h *Handler) resolveIP(r *Request) { + if h.trusted.IsTrusted(r.RemoteAddr) == false { + return + } + + if r.Header.Get("X-Forwarded-For") != "" { + ips := strings.Split(r.Header.Get("X-Forwarded-For"), ",") + ipCount := len(ips) + + for i := ipCount - 1; i >= 0; i-- { + addr := strings.TrimSpace(ips[i]) + if net.ParseIP(addr) != nil { + r.RemoteAddr = addr + return + } + } + + return + } + + // The logic here is the following: + // In general case, we only expect X-Real-Ip header. If it exist, we get the IP address from header and set request Remote address + // But, if there is no X-Real-Ip header, we also trying to check CloudFlare headers + // True-Client-IP is a general CF header in which copied information from X-Real-Ip in CF. + // CF-Connecting-IP is an Enterprise feature and we check it last in order. + // This operations are near O(1) because Headers struct are the map type -> type MIMEHeader map[string][]string + if r.Header.Get("X-Real-Ip") != "" { + r.RemoteAddr = fetchIP(r.Header.Get("X-Real-Ip")) + return + } + + if r.Header.Get("True-Client-IP") != "" { + r.RemoteAddr = fetchIP(r.Header.Get("True-Client-IP")) + return + } + + if r.Header.Get("CF-Connecting-IP") != "" { + r.RemoteAddr = fetchIP(r.Header.Get("CF-Connecting-IP")) + } +} diff --git a/plugins/http/parse.go b/plugins/http/parse.go new file mode 100644 index 00000000..d4a1604b --- /dev/null +++ b/plugins/http/parse.go @@ -0,0 +1,147 @@ +package http + +import ( + "net/http" +) + +// MaxLevel defines maximum tree depth for incoming request data and files. +const MaxLevel = 127 + +type dataTree map[string]interface{} +type fileTree map[string]interface{} + +// parseData parses incoming request body into data tree. +func parseData(r *http.Request) dataTree { + data := make(dataTree) + if r.PostForm != nil { + for k, v := range r.PostForm { + data.push(k, v) + } + } + + if r.MultipartForm != nil { + for k, v := range r.MultipartForm.Value { + data.push(k, v) + } + } + + return data +} + +// pushes value into data tree. +func (d dataTree) push(k string, v []string) { + keys := FetchIndexes(k) + if len(keys) <= MaxLevel { + d.mount(keys, v) + } +} + +// mount mounts data tree recursively. +func (d dataTree) mount(i []string, v []string) { + if len(i) == 1 { + // single value context (last element) + d[i[0]] = v[len(v)-1] + return + } + + if len(i) == 2 && i[1] == "" { + // non associated array of elements + d[i[0]] = v + return + } + + if p, ok := d[i[0]]; ok { + p.(dataTree).mount(i[1:], v) + return + } + + d[i[0]] = make(dataTree) + d[i[0]].(dataTree).mount(i[1:], v) +} + +// parse incoming dataTree request into JSON (including contentMultipart form dataTree) +func parseUploads(r *http.Request, cfg UploadsConfig) *Uploads { + u := &Uploads{ + cfg: cfg, + tree: make(fileTree), + list: make([]*FileUpload, 0), + } + + for k, v := range r.MultipartForm.File { + files := make([]*FileUpload, 0, len(v)) + for _, f := range v { + files = append(files, NewUpload(f)) + } + + u.list = append(u.list, files...) + u.tree.push(k, files) + } + + return u +} + +// pushes new file upload into it's proper place. +func (d fileTree) push(k string, v []*FileUpload) { + keys := FetchIndexes(k) + if len(keys) <= MaxLevel { + d.mount(keys, v) + } +} + +// mount mounts data tree recursively. +func (d fileTree) mount(i []string, v []*FileUpload) { + if len(i) == 1 { + // single value context + d[i[0]] = v[0] + return + } + + if len(i) == 2 && i[1] == "" { + // non associated array of elements + d[i[0]] = v + return + } + + if p, ok := d[i[0]]; ok { + p.(fileTree).mount(i[1:], v) + return + } + + d[i[0]] = make(fileTree) + d[i[0]].(fileTree).mount(i[1:], v) +} + +// FetchIndexes parses input name and splits it into separate indexes list. +func FetchIndexes(s string) []string { + var ( + pos int + ch string + keys = make([]string, 1) + ) + + for _, c := range s { + ch = string(c) + switch ch { + case " ": + // ignore all spaces + continue + case "[": + pos = 1 + continue + case "]": + if pos == 1 { + keys = append(keys, "") + } + pos = 2 + default: + if pos == 1 || pos == 2 { + keys = append(keys, "") + } + + keys[len(keys)-1] += ch + pos = 0 + } + } + + return keys +} diff --git a/plugins/http/plugin.go b/plugins/http/plugin.go new file mode 100644 index 00000000..e6aba78b --- /dev/null +++ b/plugins/http/plugin.go @@ -0,0 +1,532 @@ +package http + +import ( + "context" + "crypto/tls" + "crypto/x509" + "fmt" + "io/ioutil" + "net/http" + "net/http/fcgi" + "net/url" + "strings" + "sync" + + "github.com/hashicorp/go-multierror" + "github.com/spiral/endure" + "github.com/spiral/errors" + "github.com/spiral/roadrunner/v2/interfaces/pool" + "github.com/spiral/roadrunner/v2/interfaces/worker" + poolImpl "github.com/spiral/roadrunner/v2/pkg/pool" + "github.com/spiral/roadrunner/v2/plugins/checker" + "github.com/spiral/roadrunner/v2/plugins/config" + "github.com/spiral/roadrunner/v2/plugins/http/attributes" + "github.com/spiral/roadrunner/v2/plugins/logger" + "github.com/spiral/roadrunner/v2/plugins/server" + "github.com/spiral/roadrunner/v2/utils" + "golang.org/x/net/http2" + "golang.org/x/net/http2/h2c" + "golang.org/x/sys/cpu" +) + +const ( + // PluginName declares plugin name. + PluginName = "http" + + // EventInitSSL thrown at moment of https initialization. SSL server passed as context. + EventInitSSL = 750 +) + +// Middleware interface +type Middleware interface { + Middleware(f http.Handler) http.HandlerFunc +} + +type middleware map[string]Middleware + +// Plugin manages pool, http servers. The main http plugin structure +type Plugin struct { + sync.RWMutex + + configurer config.Configurer + server server.Server + log logger.Logger + + cfg *Config + // middlewares to chain + mdwr middleware + + // Pool which attached to all servers + pool pool.Pool + + // servers RR handler + handler *Handler + + // servers + http *http.Server + https *http.Server + fcgi *http.Server +} + +// Init must return configure svc and return true if svc hasStatus enabled. Must return error in case of +// misconfiguration. Services must not be used without proper configuration pushed first. +func (s *Plugin) Init(cfg config.Configurer, log logger.Logger, server server.Server) error { + const op = errors.Op("http Init") + err := cfg.UnmarshalKey(PluginName, &s.cfg) + if err != nil { + return errors.E(op, err) + } + + err = s.cfg.InitDefaults() + if err != nil { + return errors.E(op, err) + } + + s.configurer = cfg + s.log = log + s.mdwr = make(map[string]Middleware) + + if !s.cfg.EnableHTTP() && !s.cfg.EnableTLS() && !s.cfg.EnableFCGI() { + return errors.E(op, errors.Disabled) + } + + s.pool, err = server.NewWorkerPool(context.Background(), poolImpl.Config{ + Debug: s.cfg.Pool.Debug, + NumWorkers: s.cfg.Pool.NumWorkers, + MaxJobs: s.cfg.Pool.MaxJobs, + AllocateTimeout: s.cfg.Pool.AllocateTimeout, + DestroyTimeout: s.cfg.Pool.DestroyTimeout, + Supervisor: s.cfg.Pool.Supervisor, + }, s.cfg.Env, s.logCallback) + if err != nil { + return errors.E(op, err) + } + + s.server = server + + return nil +} + +func (s *Plugin) logCallback(event interface{}) { + if ev, ok := event.(ResponseEvent); ok { + s.log.Debug("http handler response received", "elapsed", ev.Elapsed().String(), "remote address", ev.Request.RemoteAddr) + } +} + +// Serve serves the svc. +func (s *Plugin) Serve() chan error { + s.Lock() + defer s.Unlock() + + const op = errors.Op("serve http") + errCh := make(chan error, 2) + + var err error + s.handler, err = NewHandler( + s.cfg.MaxRequestSize, + *s.cfg.Uploads, + s.cfg.cidrs, + s.pool, + ) + if err != nil { + errCh <- errors.E(op, err) + return errCh + } + + s.handler.AddListener(s.logCallback) + + if s.cfg.EnableHTTP() { + if s.cfg.EnableH2C() { + s.http = &http.Server{Addr: s.cfg.Address, Handler: h2c.NewHandler(s, &http2.Server{})} + } else { + s.http = &http.Server{Addr: s.cfg.Address, Handler: s} + } + } + + if s.cfg.EnableTLS() { + s.https = s.initSSL() + if s.cfg.SSL.RootCA != "" { + err = s.appendRootCa() + if err != nil { + errCh <- errors.E(op, err) + return errCh + } + } + + if s.cfg.EnableHTTP2() { + if err := s.initHTTP2(); err != nil { + errCh <- errors.E(op, err) + return errCh + } + } + } + + if s.cfg.EnableFCGI() { + s.fcgi = &http.Server{Handler: s} + } + + // apply middlewares before starting the server + if len(s.mdwr) > 0 { + s.addMiddlewares() + } + + if s.http != nil { + go func() { + httpErr := s.http.ListenAndServe() + if httpErr != nil && httpErr != http.ErrServerClosed { + errCh <- errors.E(op, httpErr) + return + } + }() + } + + if s.https != nil { + go func() { + httpErr := s.https.ListenAndServeTLS( + s.cfg.SSL.Cert, + s.cfg.SSL.Key, + ) + + if httpErr != nil && httpErr != http.ErrServerClosed { + errCh <- errors.E(op, httpErr) + return + } + }() + } + + if s.fcgi != nil { + go func() { + httpErr := s.serveFCGI() + if httpErr != nil && httpErr != http.ErrServerClosed { + errCh <- errors.E(op, httpErr) + return + } + }() + } + + return errCh +} + +// Stop stops the http. +func (s *Plugin) Stop() error { + s.Lock() + defer s.Unlock() + + var err error + if s.fcgi != nil { + err = s.fcgi.Shutdown(context.Background()) + if err != nil && err != http.ErrServerClosed { + s.log.Error("error shutting down the fcgi server", "error", err) + // write error and try to stop other transport + err = multierror.Append(err) + } + } + + if s.https != nil { + err = s.https.Shutdown(context.Background()) + if err != nil && err != http.ErrServerClosed { + s.log.Error("error shutting down the https server", "error", err) + // write error and try to stop other transport + err = multierror.Append(err) + } + } + + if s.http != nil { + err = s.http.Shutdown(context.Background()) + if err != nil && err != http.ErrServerClosed { + s.log.Error("error shutting down the http server", "error", err) + // write error and try to stop other transport + err = multierror.Append(err) + } + } + + s.pool.Destroy(context.Background()) + + return err +} + +// ServeHTTP handles connection using set of middleware and pool PSR-7 server. +func (s *Plugin) ServeHTTP(w http.ResponseWriter, r *http.Request) { + if headerContainsUpgrade(r, s) { + http.Error(w, "server does not support upgrade header", http.StatusInternalServerError) + return + } + + if s.redirect(w, r) { + return + } + + if s.https != nil && r.TLS != nil { + w.Header().Add("Strict-Transport-Security", "max-age=31536000; includeSubDomains; preload") + } + + r = attributes.Init(r) + // protect the case, when user send Reset and we are replacing handler with pool + s.RLock() + s.handler.ServeHTTP(w, r) + s.RUnlock() +} + +// Workers returns associated pool workers +func (s *Plugin) Workers() []worker.BaseProcess { + return s.pool.Workers() +} + +// Name returns endure.Named interface implementation +func (s *Plugin) Name() string { + return PluginName +} + +// Reset destroys the old pool and replaces it with new one, waiting for old pool to die +func (s *Plugin) Reset() error { + s.Lock() + defer s.Unlock() + const op = errors.Op("http reset") + s.log.Info("HTTP plugin got restart request. Restarting...") + s.pool.Destroy(context.Background()) + s.pool = nil + + // re-read the config + err := s.configurer.UnmarshalKey(PluginName, &s.cfg) + if err != nil { + return errors.E(op, err) + } + + s.pool, err = s.server.NewWorkerPool(context.Background(), poolImpl.Config{ + Debug: s.cfg.Pool.Debug, + NumWorkers: s.cfg.Pool.NumWorkers, + MaxJobs: s.cfg.Pool.MaxJobs, + AllocateTimeout: s.cfg.Pool.AllocateTimeout, + DestroyTimeout: s.cfg.Pool.DestroyTimeout, + Supervisor: s.cfg.Pool.Supervisor, + }, s.cfg.Env, s.logCallback) + if err != nil { + return errors.E(op, err) + } + + s.log.Info("HTTP listeners successfully re-added") + + s.log.Info("HTTP workers Pool successfully restarted") + s.handler, err = NewHandler( + s.cfg.MaxRequestSize, + *s.cfg.Uploads, + s.cfg.cidrs, + s.pool, + ) + if err != nil { + return errors.E(op, err) + } + + s.log.Info("HTTP plugin successfully restarted") + return nil +} + +// Collects collecting http middlewares +func (s *Plugin) Collects() []interface{} { + return []interface{}{ + s.AddMiddleware, + } +} + +// AddMiddleware is base requirement for the middleware (name and Middleware) +func (s *Plugin) AddMiddleware(name endure.Named, m Middleware) { + s.mdwr[name.Name()] = m +} + +// Status return status of the particular plugin +func (s *Plugin) Status() checker.Status { + workers := s.Workers() + for i := 0; i < len(workers); i++ { + if workers[i].State().IsActive() { + return checker.Status{ + Code: http.StatusOK, + } + } + } + // if there are no workers, threat this as error + return checker.Status{ + Code: http.StatusInternalServerError, + } +} + +func (s *Plugin) redirect(w http.ResponseWriter, r *http.Request) bool { + if s.https != nil && r.TLS == nil && s.cfg.SSL.Redirect { + target := &url.URL{ + Scheme: "https", + Host: s.tlsAddr(r.Host, false), + Path: r.URL.Path, + RawQuery: r.URL.RawQuery, + } + + http.Redirect(w, r, target.String(), http.StatusTemporaryRedirect) + return true + } + return false +} + +func headerContainsUpgrade(r *http.Request, s *Plugin) bool { + if _, ok := r.Header["Upgrade"]; ok { + // https://golang.org/pkg/net/http/#Hijacker + s.log.Error("server does not support Upgrade header") + return true + } + return false +} + +// append RootCA to the https server TLS config +func (s *Plugin) appendRootCa() error { + const op = errors.Op("append root CA") + rootCAs, err := x509.SystemCertPool() + if err != nil { + return nil + } + if rootCAs == nil { + rootCAs = x509.NewCertPool() + } + + CA, err := ioutil.ReadFile(s.cfg.SSL.RootCA) + if err != nil { + return err + } + + // should append our CA cert + ok := rootCAs.AppendCertsFromPEM(CA) + if !ok { + return errors.E(op, errors.Str("could not append Certs from PEM")) + } + // disable "G402 (CWE-295): TLS MinVersion too low. (Confidence: HIGH, Severity: HIGH)" + // #nosec G402 + cfg := &tls.Config{ + InsecureSkipVerify: false, + RootCAs: rootCAs, + } + s.http.TLSConfig = cfg + + return nil +} + +// Init https server +func (s *Plugin) initSSL() *http.Server { + var topCipherSuites []uint16 + var defaultCipherSuitesTLS13 []uint16 + + hasGCMAsmAMD64 := cpu.X86.HasAES && cpu.X86.HasPCLMULQDQ + hasGCMAsmARM64 := cpu.ARM64.HasAES && cpu.ARM64.HasPMULL + // Keep in sync with crypto/aes/cipher_s390x.go. + hasGCMAsmS390X := cpu.S390X.HasAES && cpu.S390X.HasAESCBC && cpu.S390X.HasAESCTR && (cpu.S390X.HasGHASH || cpu.S390X.HasAESGCM) + + hasGCMAsm := hasGCMAsmAMD64 || hasGCMAsmARM64 || hasGCMAsmS390X + + if hasGCMAsm { + // If AES-GCM hardware is provided then priorities AES-GCM + // cipher suites. + topCipherSuites = []uint16{ + tls.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + tls.TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + tls.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + tls.TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + tls.TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + tls.TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, + } + defaultCipherSuitesTLS13 = []uint16{ + tls.TLS_AES_128_GCM_SHA256, + tls.TLS_CHACHA20_POLY1305_SHA256, + tls.TLS_AES_256_GCM_SHA384, + } + } else { + // Without AES-GCM hardware, we put the ChaCha20-Poly1305 + // cipher suites first. + topCipherSuites = []uint16{ + tls.TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, + tls.TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, + tls.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + tls.TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + tls.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + tls.TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + } + defaultCipherSuitesTLS13 = []uint16{ + tls.TLS_CHACHA20_POLY1305_SHA256, + tls.TLS_AES_128_GCM_SHA256, + tls.TLS_AES_256_GCM_SHA384, + } + } + + DefaultCipherSuites := make([]uint16, 0, 22) + DefaultCipherSuites = append(DefaultCipherSuites, topCipherSuites...) + DefaultCipherSuites = append(DefaultCipherSuites, defaultCipherSuitesTLS13...) + + server := &http.Server{ + Addr: s.tlsAddr(s.cfg.Address, true), + Handler: s, + TLSConfig: &tls.Config{ + CurvePreferences: []tls.CurveID{ + tls.CurveP256, + tls.CurveP384, + tls.CurveP521, + tls.X25519, + }, + CipherSuites: DefaultCipherSuites, + MinVersion: tls.VersionTLS12, + PreferServerCipherSuites: true, + }, + } + + return server +} + +// init http/2 server +func (s *Plugin) initHTTP2() error { + return http2.ConfigureServer(s.https, &http2.Server{ + MaxConcurrentStreams: s.cfg.HTTP2.MaxConcurrentStreams, + }) +} + +// serveFCGI starts FastCGI server. +func (s *Plugin) serveFCGI() error { + l, err := utils.CreateListener(s.cfg.FCGI.Address) + if err != nil { + return err + } + + err = fcgi.Serve(l, s.fcgi.Handler) + if err != nil { + return err + } + + return nil +} + +// tlsAddr replaces listen or host port with port configured by SSL config. +func (s *Plugin) tlsAddr(host string, forcePort bool) string { + // remove current forcePort first + host = strings.Split(host, ":")[0] + + if forcePort || s.cfg.SSL.Port != 443 { + host = fmt.Sprintf("%s:%v", host, s.cfg.SSL.Port) + } + + return host +} + +func (s *Plugin) addMiddlewares() { + if s.http != nil { + applyMiddlewares(s.http, s.mdwr, s.cfg.Middleware, s.log) + } + if s.https != nil { + applyMiddlewares(s.https, s.mdwr, s.cfg.Middleware, s.log) + } + + if s.fcgi != nil { + applyMiddlewares(s.fcgi, s.mdwr, s.cfg.Middleware, s.log) + } +} + +func applyMiddlewares(server *http.Server, middlewares map[string]Middleware, order []string, log logger.Logger) { + for i := 0; i < len(order); i++ { + if mdwr, ok := middlewares[order[i]]; ok { + server.Handler = mdwr.Middleware(server.Handler) + } else { + log.Warn("requested middleware does not exist", "requested", order[i]) + } + } +} diff --git a/plugins/http/request.go b/plugins/http/request.go new file mode 100644 index 00000000..3983fdde --- /dev/null +++ b/plugins/http/request.go @@ -0,0 +1,186 @@ +package http + +import ( + "fmt" + "io/ioutil" + "net" + "net/http" + "net/url" + "strings" + + j "github.com/json-iterator/go" + "github.com/spiral/roadrunner/v2/pkg/payload" + "github.com/spiral/roadrunner/v2/plugins/http/attributes" + "github.com/spiral/roadrunner/v2/plugins/logger" +) + +var json = j.ConfigCompatibleWithStandardLibrary + +const ( + defaultMaxMemory = 32 << 20 // 32 MB + contentNone = iota + 900 + contentStream + contentMultipart + contentFormData +) + +// Request maps net/http requests to PSR7 compatible structure and managed state of temporary uploaded files. +type Request struct { + // RemoteAddr contains ip address of client, make sure to check X-Real-Ip and X-Forwarded-For for real client address. + RemoteAddr string `json:"remoteAddr"` + + // Protocol includes HTTP protocol version. + Protocol string `json:"protocol"` + + // Method contains name of HTTP method used for the request. + Method string `json:"method"` + + // URI contains full request URI with scheme and query. + URI string `json:"uri"` + + // Header contains list of request headers. + Header http.Header `json:"headers"` + + // Cookies contains list of request cookies. + Cookies map[string]string `json:"cookies"` + + // RawQuery contains non parsed query string (to be parsed on php end). + RawQuery string `json:"rawQuery"` + + // Parsed indicates that request body has been parsed on RR end. + Parsed bool `json:"parsed"` + + // Uploads contains list of uploaded files, their names, sized and associations with temporary files. + Uploads *Uploads `json:"uploads"` + + // Attributes can be set by chained mdwr to safely pass value from Golang to PHP. See: GetAttribute, SetAttribute functions. + Attributes map[string]interface{} `json:"attributes"` + + // request body can be parsedData or []byte + body interface{} +} + +func fetchIP(pair string) string { + if !strings.ContainsRune(pair, ':') { + return pair + } + + addr, _, _ := net.SplitHostPort(pair) + return addr +} + +// NewRequest creates new PSR7 compatible request using net/http request. +func NewRequest(r *http.Request, cfg UploadsConfig) (*Request, error) { + req := &Request{ + RemoteAddr: fetchIP(r.RemoteAddr), + Protocol: r.Proto, + Method: r.Method, + URI: uri(r), + Header: r.Header, + Cookies: make(map[string]string), + RawQuery: r.URL.RawQuery, + Attributes: attributes.All(r), + } + + for _, c := range r.Cookies() { + if v, err := url.QueryUnescape(c.Value); err == nil { + req.Cookies[c.Name] = v + } + } + + switch req.contentType() { + case contentNone: + return req, nil + + case contentStream: + var err error + req.body, err = ioutil.ReadAll(r.Body) + return req, err + + case contentMultipart: + if err := r.ParseMultipartForm(defaultMaxMemory); err != nil { + return nil, err + } + + req.Uploads = parseUploads(r, cfg) + fallthrough + case contentFormData: + if err := r.ParseForm(); err != nil { + return nil, err + } + + req.body = parseData(r) + } + + req.Parsed = true + return req, nil +} + +// Open moves all uploaded files to temporary directory so it can be given to php later. +func (r *Request) Open(log logger.Logger) { + if r.Uploads == nil { + return + } + + r.Uploads.Open(log) +} + +// Close clears all temp file uploads +func (r *Request) Close(log logger.Logger) { + if r.Uploads == nil { + return + } + + r.Uploads.Clear(log) +} + +// Payload request marshaled RoadRunner payload based on PSR7 data. values encode method is JSON. Make sure to open +// files prior to calling this method. +func (r *Request) Payload() (payload.Payload, error) { + p := payload.Payload{} + + var err error + if p.Context, err = json.Marshal(r); err != nil { + return payload.Payload{}, err + } + + if r.Parsed { + if p.Body, err = json.Marshal(r.body); err != nil { + return payload.Payload{}, err + } + } else if r.body != nil { + p.Body = r.body.([]byte) + } + + return p, nil +} + +// contentType returns the payload content type. +func (r *Request) contentType() int { + if r.Method == "HEAD" || r.Method == "OPTIONS" { + return contentNone + } + + ct := r.Header.Get("content-type") + if strings.Contains(ct, "application/x-www-form-urlencoded") { + return contentFormData + } + + if strings.Contains(ct, "multipart/form-data") { + return contentMultipart + } + + return contentStream +} + +// uri fetches full uri from request in a form of string (including https scheme if TLS connection is enabled). +func uri(r *http.Request) string { + if r.URL.Host != "" { + return r.URL.String() + } + if r.TLS != nil { + return fmt.Sprintf("https://%s%s", r.Host, r.URL.String()) + } + + return fmt.Sprintf("http://%s%s", r.Host, r.URL.String()) +} diff --git a/plugins/http/response.go b/plugins/http/response.go new file mode 100644 index 00000000..17049ce1 --- /dev/null +++ b/plugins/http/response.go @@ -0,0 +1,105 @@ +package http + +import ( + "io" + "net/http" + "strings" + "sync" + + "github.com/spiral/roadrunner/v2/pkg/payload" +) + +// Response handles PSR7 response logic. +type Response struct { + // Status contains response status. + Status int `json:"status"` + + // Header contains list of response headers. + Headers map[string][]string `json:"headers"` + + // associated Body payload. + Body interface{} + sync.Mutex +} + +// NewResponse creates new response based on given pool payload. +func NewResponse(p payload.Payload) (*Response, error) { + r := &Response{Body: p.Body} + if err := json.Unmarshal(p.Context, r); err != nil { + return nil, err + } + + return r, nil +} + +// Write writes response headers, status and body into ResponseWriter. +func (r *Response) Write(w http.ResponseWriter) error { + // INFO map is the reference type in golang + p := handlePushHeaders(r.Headers) + if pusher, ok := w.(http.Pusher); ok { + for _, v := range p { + err := pusher.Push(v, nil) + if err != nil { + return err + } + } + } + + handleTrailers(r.Headers) + for n, h := range r.Headers { + for _, v := range h { + w.Header().Add(n, v) + } + } + + w.WriteHeader(r.Status) + + if data, ok := r.Body.([]byte); ok { + _, err := w.Write(data) + if err != nil { + return handleWriteError(err) + } + } + + if rc, ok := r.Body.(io.Reader); ok { + if _, err := io.Copy(w, rc); err != nil { + return err + } + } + + return nil +} + +func handlePushHeaders(h map[string][]string) []string { + var p []string + pushHeader, ok := h[http2pushHeaderKey] + if !ok { + return p + } + + p = append(p, pushHeader...) + + delete(h, http2pushHeaderKey) + + return p +} + +func handleTrailers(h map[string][]string) { + trailers, ok := h[TrailerHeaderKey] + if !ok { + return + } + + for _, tr := range trailers { + for _, n := range strings.Split(tr, ",") { + n = strings.Trim(n, "\t ") + if v, ok := h[n]; ok { + h["Trailer:"+n] = v + + delete(h, n) + } + } + } + + delete(h, TrailerHeaderKey) +} diff --git a/plugins/http/uploads.go b/plugins/http/uploads.go new file mode 100644 index 00000000..d5196844 --- /dev/null +++ b/plugins/http/uploads.go @@ -0,0 +1,158 @@ +package http + +import ( + "github.com/spiral/roadrunner/v2/plugins/logger" + + "io" + "io/ioutil" + "mime/multipart" + "os" + "sync" +) + +const ( + // UploadErrorOK - no error, the file uploaded with success. + UploadErrorOK = 0 + + // UploadErrorNoFile - no file was uploaded. + UploadErrorNoFile = 4 + + // UploadErrorNoTmpDir - missing a temporary folder. + UploadErrorNoTmpDir = 6 + + // UploadErrorCantWrite - failed to write file to disk. + UploadErrorCantWrite = 7 + + // UploadErrorExtension - forbidden file extension. + UploadErrorExtension = 8 +) + +// Uploads tree manages uploaded files tree and temporary files. +type Uploads struct { + // associated temp directory and forbidden extensions. + cfg UploadsConfig + + // pre processed data tree for Uploads. + tree fileTree + + // flat list of all file Uploads. + list []*FileUpload +} + +// MarshalJSON marshal tree tree into JSON. +func (u *Uploads) MarshalJSON() ([]byte, error) { + return json.Marshal(u.tree) +} + +// Open moves all uploaded files to temp directory, return error in case of issue with temp directory. File errors +// will be handled individually. +func (u *Uploads) Open(log logger.Logger) { + var wg sync.WaitGroup + for _, f := range u.list { + wg.Add(1) + go func(f *FileUpload) { + defer wg.Done() + err := f.Open(u.cfg) + if err != nil && log != nil { + log.Error("error opening the file", "err", err) + } + }(f) + } + + wg.Wait() +} + +// Clear deletes all temporary files. +func (u *Uploads) Clear(log logger.Logger) { + for _, f := range u.list { + if f.TempFilename != "" && exists(f.TempFilename) { + err := os.Remove(f.TempFilename) + if err != nil && log != nil { + log.Error("error removing the file", "err", err) + } + } + } +} + +// FileUpload represents singular file NewUpload. +type FileUpload struct { + // ID contains filename specified by the client. + Name string `json:"name"` + + // Mime contains mime-type provided by the client. + Mime string `json:"mime"` + + // Size of the uploaded file. + Size int64 `json:"size"` + + // Error indicates file upload error (if any). See http://php.net/manual/en/features.file-upload.errors.php + Error int `json:"error"` + + // TempFilename points to temporary file location. + TempFilename string `json:"tmpName"` + + // associated file header + header *multipart.FileHeader +} + +// NewUpload wraps net/http upload into PRS-7 compatible structure. +func NewUpload(f *multipart.FileHeader) *FileUpload { + return &FileUpload{ + Name: f.Filename, + Mime: f.Header.Get("Content-Type"), + Error: UploadErrorOK, + header: f, + } +} + +// Open moves file content into temporary file available for PHP. +// NOTE: +// There is 2 deferred functions, and in case of getting 2 errors from both functions +// error from close of temp file would be overwritten by error from the main file +// STACK +// DEFER FILE CLOSE (2) +// DEFER TMP CLOSE (1) +func (f *FileUpload) Open(cfg UploadsConfig) (err error) { + if cfg.Forbids(f.Name) { + f.Error = UploadErrorExtension + return nil + } + + file, err := f.header.Open() + if err != nil { + f.Error = UploadErrorNoFile + return err + } + + defer func() { + // close the main file + err = file.Close() + }() + + tmp, err := ioutil.TempFile(cfg.TmpDir(), "upload") + if err != nil { + // most likely cause of this issue is missing tmp dir + f.Error = UploadErrorNoTmpDir + return err + } + + f.TempFilename = tmp.Name() + defer func() { + // close the temp file + err = tmp.Close() + }() + + if f.Size, err = io.Copy(tmp, file); err != nil { + f.Error = UploadErrorCantWrite + } + + return err +} + +// exists if file exists. +func exists(path string) bool { + if _, err := os.Stat(path); os.IsNotExist(err) { + return false + } + return true +} diff --git a/plugins/http/uploads_config.go b/plugins/http/uploads_config.go new file mode 100644 index 00000000..4c20c8e8 --- /dev/null +++ b/plugins/http/uploads_config.go @@ -0,0 +1,46 @@ +package http + +import ( + "os" + "path" + "strings" +) + +// UploadsConfig describes file location and controls access to them. +type UploadsConfig struct { + // Dir contains name of directory to control access to. + Dir string + + // Forbid specifies list of file extensions which are forbidden for access. + // Example: .php, .exe, .bat, .htaccess and etc. + Forbid []string +} + +// InitDefaults sets missing values to their default values. +func (cfg *UploadsConfig) InitDefaults() error { + cfg.Forbid = []string{".php", ".exe", ".bat"} + cfg.Dir = os.TempDir() + return nil +} + +// TmpDir returns temporary directory. +func (cfg *UploadsConfig) TmpDir() string { + if cfg.Dir != "" { + return cfg.Dir + } + + return os.TempDir() +} + +// Forbids must return true if file extension is not allowed for the upload. +func (cfg *UploadsConfig) Forbids(filename string) bool { + ext := strings.ToLower(path.Ext(filename)) + + for _, v := range cfg.Forbid { + if ext == v { + return true + } + } + + return false +} |