94 lines
1.5 KiB
Go
94 lines
1.5 KiB
Go
|
package timeout
|
||
|
|
|
||
|
|
import (
|
||
|
|
"time"
|
||
|
|
|
||
|
|
"github.com/gin-gonic/gin"
|
||
|
|
)
|
||
|
|
|
||
|
|
var bufPool *BufferPool
|
||
|
|
|
||
|
|
const (
|
||
|
|
defaultTimeout = 5 * time.Second
|
||
|
|
)
|
||
|
|
|
||
|
|
// New wraps a handler and aborts the process of the handler if the timeout is reached
|
||
|
|
func New(opts ...Option) gin.HandlerFunc {
|
||
|
|
t := &Timeout{
|
||
|
|
timeout: defaultTimeout,
|
||
|
|
handler: nil,
|
||
|
|
response: defaultResponse,
|
||
|
|
}
|
||
|
|
|
||
|
|
// Loop through each option
|
||
|
|
for _, opt := range opts {
|
||
|
|
if opt == nil {
|
||
|
|
panic("timeout Option not be nil")
|
||
|
|
}
|
||
|
|
|
||
|
|
// Call the option giving the instantiated
|
||
|
|
opt(t)
|
||
|
|
}
|
||
|
|
|
||
|
|
if t.timeout <= 0 {
|
||
|
|
return t.handler
|
||
|
|
}
|
||
|
|
|
||
|
|
bufPool = &BufferPool{}
|
||
|
|
|
||
|
|
return func(c *gin.Context) {
|
||
|
|
finish := make(chan struct{}, 1)
|
||
|
|
panicChan := make(chan interface{}, 1)
|
||
|
|
|
||
|
|
w := c.Writer
|
||
|
|
buffer := bufPool.Get()
|
||
|
|
tw := NewWriter(w, buffer)
|
||
|
|
c.Writer = tw
|
||
|
|
buffer.Reset()
|
||
|
|
|
||
|
|
go func() {
|
||
|
|
defer func() {
|
||
|
|
if p := recover(); p != nil {
|
||
|
|
panicChan <- p
|
||
|
|
}
|
||
|
|
}()
|
||
|
|
t.handler(c)
|
||
|
|
finish <- struct{}{}
|
||
|
|
}()
|
||
|
|
|
||
|
|
select {
|
||
|
|
case p := <-panicChan:
|
||
|
|
tw.FreeBuffer()
|
||
|
|
c.Writer = w
|
||
|
|
panic(p)
|
||
|
|
|
||
|
|
case <-finish:
|
||
|
|
c.Next()
|
||
|
|
tw.mu.Lock()
|
||
|
|
defer tw.mu.Unlock()
|
||
|
|
dst := tw.ResponseWriter.Header()
|
||
|
|
for k, vv := range tw.Header() {
|
||
|
|
dst[k] = vv
|
||
|
|
}
|
||
|
|
|
||
|
|
if _, err := tw.ResponseWriter.Write(buffer.Bytes()); err != nil {
|
||
|
|
panic(err)
|
||
|
|
}
|
||
|
|
tw.FreeBuffer()
|
||
|
|
bufPool.Put(buffer)
|
||
|
|
|
||
|
|
case <-time.After(t.timeout):
|
||
|
|
c.Abort()
|
||
|
|
tw.mu.Lock()
|
||
|
|
defer tw.mu.Unlock()
|
||
|
|
tw.timeout = true
|
||
|
|
tw.FreeBuffer()
|
||
|
|
bufPool.Put(buffer)
|
||
|
|
|
||
|
|
c.Writer = w
|
||
|
|
t.response(c)
|
||
|
|
c.Writer = tw
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|