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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,70 @@ | ||
| package api | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "github.com/lizongying/go-crawler/pkg" | ||
| "net/http" | ||
| ) | ||
|
|
||
| const UrlLog = "/log" | ||
|
|
||
| type RouteLog struct { | ||
| Request | ||
| Response | ||
| crawler pkg.Crawler | ||
| logger pkg.Logger | ||
| stream pkg.Stream | ||
| } | ||
|
|
||
| func (h *RouteLog) Pattern() string { | ||
| return UrlLog | ||
| } | ||
|
|
||
| func (h *RouteLog) ServeHTTP(w http.ResponseWriter, r *http.Request) { | ||
| w.Header().Set("Content-Type", "text/event-stream") | ||
| w.Header().Set("Cache-Control", "no-cache") | ||
| w.Header().Set("Connection", "keep-alive") | ||
|
|
||
| if r.URL.Query().Get("task_id") == "" { | ||
| http.Error(w, "TaskId empty", http.StatusInternalServerError) | ||
| return | ||
| } | ||
|
|
||
| flusher, ok := w.(http.Flusher) | ||
| if !ok { | ||
| http.Error(w, "Streaming not supported", http.StatusInternalServerError) | ||
| return | ||
| } | ||
|
|
||
| logChannel := make(chan []byte, 100) | ||
| h.stream.Register("", logChannel) | ||
| defer func() { | ||
| h.stream.Unregister("") | ||
| close(logChannel) | ||
| }() | ||
|
|
||
| for { | ||
| var message []byte | ||
| select { | ||
| case message, ok = <-logChannel: | ||
| if !ok { | ||
| return | ||
| } | ||
| _, _ = fmt.Fprintf(w, "data: %s\n\n", string(message)) | ||
| flusher.Flush() | ||
| case <-r.Context().Done(): | ||
| return | ||
| } | ||
| } | ||
| } | ||
|
|
||
| func (h *RouteLog) FromCrawler(crawler pkg.Crawler) pkg.Route { | ||
| if h == nil { | ||
| return new(RouteLog).FromCrawler(crawler) | ||
| } | ||
|
|
||
| h.logger = crawler.GetLogger() | ||
| h.crawler = crawler | ||
| h.stream = crawler.GetStream() | ||
| return h | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,8 @@ | ||
| package loggers | ||
|
|
||
| import "io" | ||
|
|
||
| type Out struct { | ||
| io.Writer | ||
| Name string | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,67 @@ | ||
| package loggers | ||
|
|
||
| type Ch struct { | ||
| Name string | ||
| Channel chan []byte | ||
| } | ||
|
|
||
| type Stream struct { | ||
| channels map[string]chan []byte | ||
| register chan Ch | ||
| unregister chan string | ||
| channel chan []byte | ||
| } | ||
|
|
||
| func NewStream() (s *Stream) { | ||
| s = &Stream{ | ||
| channels: make(map[string]chan []byte), | ||
| register: make(chan Ch), | ||
| unregister: make(chan string), | ||
| channel: make(chan []byte, 10), | ||
| } | ||
| go func() { | ||
| for msg := range s.channel { | ||
| for _, ch := range s.channels { | ||
| select { | ||
| case ch <- msg: | ||
| default: | ||
| <-ch | ||
| ch <- msg | ||
| } | ||
| } | ||
| } | ||
| }() | ||
| go func() { | ||
| for { | ||
| select { | ||
| case ch := <-s.register: | ||
| s.channels[ch.Name] = ch.Channel | ||
| case chName := <-s.unregister: | ||
| delete(s.channels, chName) | ||
| } | ||
| } | ||
| }() | ||
|
|
||
| return | ||
| } | ||
|
|
||
| func (s *Stream) Write(p []byte) (n int, err error) { | ||
| select { | ||
| case s.channel <- p: | ||
| default: | ||
| <-s.channel | ||
| s.channel <- p | ||
| } | ||
| return | ||
| } | ||
|
|
||
| func (s *Stream) Register(name string, channel chan []byte) { | ||
| s.register <- Ch{ | ||
| Name: name, | ||
| Channel: channel, | ||
| } | ||
| } | ||
|
|
||
| func (s *Stream) Unregister(name string) { | ||
| s.unregister <- name | ||
| } |
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