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cmd/flatend, config: support serving static files
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,135 @@ | ||
| package main | ||
|
|
||
| import ( | ||
| "errors" | ||
| "fmt" | ||
| "net/http" | ||
| "net/url" | ||
| "strings" | ||
| "time" | ||
| ) | ||
|
|
||
| type Config struct { | ||
| HTTP []ConfigHTTP | ||
| } | ||
|
|
||
| func (c Config) Validate() error { | ||
| for _, srv := range c.HTTP { | ||
| err := srv.Validate() | ||
| if err != nil { | ||
| return err | ||
| } | ||
| } | ||
|
|
||
| return nil | ||
| } | ||
|
|
||
| type Duration struct { | ||
| time.Duration | ||
| } | ||
|
|
||
| func (d *Duration) UnmarshalText(text []byte) error { | ||
| var err error | ||
| d.Duration, err = time.ParseDuration(string(text)) | ||
| return err | ||
| } | ||
|
|
||
| type ConfigHTTP struct { | ||
| Addr string | ||
| Addrs []string | ||
|
|
||
| RedirectTrailingSlash *bool `toml:"redirect_trailing_slash"` | ||
| RedirectFixedPath *bool `toml:"redirect_fixed_path"` | ||
|
|
||
| Timeout struct { | ||
| Read Duration | ||
| ReadHeader Duration | ||
| Idle Duration | ||
| Write Duration | ||
| Shutdown Duration | ||
| } | ||
|
|
||
| Min struct { | ||
| BodySize *int `toml:"body_size"` | ||
| } | ||
|
|
||
| Max struct { | ||
| HeaderSize int `toml:"header_size"` | ||
| BodySize *int `toml:"body_size"` | ||
| } | ||
|
|
||
| Routes []ConfigRoute | ||
| } | ||
|
|
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| func (h ConfigHTTP) GetAddrs() []string { | ||
| if h.Addr != "" { | ||
| return []string{h.Addr} | ||
| } | ||
| return h.Addrs | ||
| } | ||
|
|
||
| func (h ConfigHTTP) Validate() error { | ||
| if h.Addr != "" && h.Addrs != nil { | ||
| return errors.New("'addr' and 'addrs' cannot both be non-nil at the same time") | ||
| } | ||
|
|
||
| for _, route := range h.Routes { | ||
| err := route.Validate() | ||
| if err != nil { | ||
| return err | ||
| } | ||
| } | ||
|
|
||
| return nil | ||
| } | ||
|
|
||
| type ConfigRoute struct { | ||
| Path string | ||
| Dispatch string | ||
| Static string // static files | ||
| Service string | ||
| Services []string | ||
|
|
||
| NoCache bool | ||
|
|
||
| Min struct { | ||
| BodySize *int `toml:"body_size"` | ||
| } | ||
|
|
||
| Max struct { | ||
| BodySize *int `toml:"body_size"` | ||
| } | ||
| } | ||
|
|
||
| func (r ConfigRoute) Validate() error { | ||
| if r.Service != "" && r.Services != nil { | ||
| return errors.New("'service' and 'services' cannot both be non-nil at the same time") | ||
| } | ||
|
|
||
| fields := strings.Fields(r.Path) | ||
| if len(fields) != 2 { | ||
| return fmt.Errorf("invalid number of fields in route path '%s' (format: 'HTTP_METHOD /path/here')", | ||
| r.Path) | ||
| } | ||
|
|
||
| method := strings.ToUpper(fields[0]) | ||
| _, exists := Methods[method] | ||
| if !exists { | ||
| return fmt.Errorf("unknown http method '%s'", method) | ||
| } | ||
|
|
||
| if len(fields[1]) < 1 || fields[1][0] != '/' { | ||
| return fmt.Errorf("path must begin with '/' in path '%s'", fields[1]) | ||
| } | ||
|
|
||
| _, err := url.ParseRequestURI(fields[1]) | ||
| if err != nil { | ||
| return fmt.Errorf("invalid http path '%s': %w", fields[1], err) | ||
| } | ||
|
|
||
| if r.Static != "" && method != http.MethodGet { | ||
| return fmt.Errorf("path '%s' method must be 'GET' to serve files", r.Path) | ||
| } | ||
|
|
||
| return nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,39 @@ | ||
| package main | ||
|
|
||
| import ( | ||
| "github.com/julienschmidt/httprouter" | ||
| "github.com/lithdew/flatend" | ||
| "io" | ||
| "net/http" | ||
| "strings" | ||
| ) | ||
|
|
||
| func HandleService(node *flatend.Node, services []string) http.Handler { | ||
| return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { | ||
| headers := make(map[string]string) | ||
| for key := range r.Header { | ||
| headers[strings.ToLower(key)] = r.Header.Get(key) | ||
| } | ||
|
|
||
| for key := range r.URL.Query() { | ||
| headers["query."+strings.ToLower(key)] = r.URL.Query().Get(key) | ||
| } | ||
|
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| params := httprouter.ParamsFromContext(r.Context()) | ||
| for _, param := range params { | ||
| headers["params."+strings.ToLower(param.Key)] = param.Value | ||
| } | ||
|
|
||
| stream, err := node.Push(services, headers, r.Body) | ||
| if err != nil { | ||
| w.Write([]byte(err.Error())) | ||
| return | ||
| } | ||
|
|
||
| for name, val := range stream.Header.Headers { | ||
| w.Header().Set(name, val) | ||
| } | ||
|
|
||
| _, _ = io.Copy(w, stream.Reader) | ||
| }) | ||
| } |
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