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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" | ||
) | ||
|
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const UrlLog = "/log" | ||
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type RouteLog struct { | ||
Request | ||
Response | ||
crawler pkg.Crawler | ||
logger pkg.Logger | ||
stream pkg.Stream | ||
} | ||
|
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func (h *RouteLog) Pattern() string { | ||
return UrlLog | ||
} | ||
|
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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 | ||
} | ||
|
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flusher, ok := w.(http.Flusher) | ||
if !ok { | ||
http.Error(w, "Streaming not supported", http.StatusInternalServerError) | ||
return | ||
} | ||
|
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logChannel := make(chan []byte, 100) | ||
h.stream.Register("", logChannel) | ||
defer func() { | ||
h.stream.Unregister("") | ||
close(logChannel) | ||
}() | ||
|
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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 | ||
} | ||
} | ||
} | ||
|
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func (h *RouteLog) FromCrawler(crawler pkg.Crawler) pkg.Route { | ||
if h == nil { | ||
return new(RouteLog).FromCrawler(crawler) | ||
} | ||
|
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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 | ||
|
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import "io" | ||
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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 | ||
} | ||
|
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type Stream struct { | ||
channels map[string]chan []byte | ||
register chan Ch | ||
unregister chan string | ||
channel chan []byte | ||
} | ||
|
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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) | ||
} | ||
} | ||
}() | ||
|
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return | ||
} | ||
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func (s *Stream) Write(p []byte) (n int, err error) { | ||
select { | ||
case s.channel <- p: | ||
default: | ||
<-s.channel | ||
s.channel <- p | ||
} | ||
return | ||
} | ||
|
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func (s *Stream) Register(name string, channel chan []byte) { | ||
s.register <- Ch{ | ||
Name: name, | ||
Channel: channel, | ||
} | ||
} | ||
|
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func (s *Stream) Unregister(name string) { | ||
s.unregister <- name | ||
} |
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