去http获取高延迟资源时崩溃

I have a panicking program which intends to illustrate the issue of retrieving high-latency resources via golang's http client.

Does someone have a clue why this is happening?

go version go1.5.1 linux/amd64

package main

import ("fmt"
    "net/http"
    "time"
    "net")

func main() {


    for i:=0; i<2000; i++ {
        start := time.Now()

         client := &http.Client{} // this enough for the program to crash
        /*client := &http.Client{
            Transport: &http.Transport{
                Dial: (&net.Dialer{
                    Timeout:   1 * time.Second,
                    KeepAlive: 0,
                }).Dial,
                DisableKeepAlives: true,
                DisableCompression: true,
                MaxIdleConnsPerHost: 1,
                ResponseHeaderTimeout: 1*time.Second,
            },
        }*/

        req, _ := http.NewRequest("GET", "http://mickle.com.au/wp-content/uploads/2015/03/11222.jpg", nil)
        req.Header.Add("Connection", "close")
        req.Header.Add("Accept-Encoding", "none")

        response, _ := client.Do(req)
        fmt.Printf("httpreq took %s. resp status: %s
", time.Since(start), response.Status)
        response.Body.Close()
    }
}

http://play.golang.org/p/nMnFb_x2yU

httpreq took 817.750359ms. resp status: 200 OK
httpreq took 798.177493ms. resp status: 200 OK
[[... left out 33 lines...]]
httpreq took 795.433486ms. resp status: 200 OK
httpreq took 805.610082ms. resp status: 200 OK
panic: runtime error: invalid memory address or nil pointer dereference
[signal 0xb code=0x1 addr=0x0 pc=0x4014a6]

goroutine 1 [running]:
main.main()
    /home/bongo/Downloads/a.go:32 +0x4a6

goroutine 17 [syscall, locked to thread]:
runtime.goexit()
    /usr/lib/golang/src/runtime/asm_amd64.s:1696 +0x1

goroutine 8 [select]:
net/http.(*persistConn).readLoop(0xc8200ac000)
    /usr/lib/golang/src/net/http/transport.go:976 +0xac7
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:685 +0xc78

goroutine 9 [select]:
net/http.(*persistConn).writeLoop(0xc8200ac000)
    /usr/lib/golang/src/net/http/transport.go:1009 +0x40c
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:686 +0xc9d

goroutine 40 [select]:
net/http.(*persistConn).readLoop(0xc8200ac2c0)
    /usr/lib/golang/src/net/http/transport.go:976 +0xac7
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:685 +0xc78

goroutine 76 [select]:
net/http.(*persistConn).readLoop(0xc8200e22c0)
    /usr/lib/golang/src/net/http/transport.go:976 +0xac7
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:685 +0xc78

goroutine 34 [select]:
net/http.(*persistConn).readLoop(0xc8200e2000)
    /usr/lib/golang/src/net/http/transport.go:976 +0xac7
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:685 +0xc78

goroutine 35 [select]:
net/http.(*persistConn).writeLoop(0xc8200e2000)
    /usr/lib/golang/src/net/http/transport.go:1009 +0x40c
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:686 +0xc9d

goroutine 12 [select]:
net/http.(*persistConn).readLoop(0xc8200ac0b0)
    /usr/lib/golang/src/net/http/transport.go:976 +0xac7
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:685 +0xc78

goroutine 13 [select]:
net/http.(*persistConn).writeLoop(0xc8200ac0b0)
    /usr/lib/golang/src/net/http/transport.go:1009 +0x40c
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:686 +0xc9d

goroutine 16 [select]:
net/http.(*persistConn).readLoop(0xc8200ac160)
    /usr/lib/golang/src/net/http/transport.go:976 +0xac7
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:685 +0xc78

goroutine 50 [select]:
net/http.(*persistConn).writeLoop(0xc8200ac160)
    /usr/lib/golang/src/net/http/transport.go:1009 +0x40c
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:686 +0xc9d

goroutine 38 [select]:
net/http.(*persistConn).readLoop(0xc82010e000)
    /usr/lib/golang/src/net/http/transport.go:976 +0xac7
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:685 +0xc78

goroutine 39 [select]:
net/http.(*persistConn).writeLoop(0xc82010e000)
    /usr/lib/golang/src/net/http/transport.go:1009 +0x40c
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:686 +0xc9d

goroutine 53 [select]:
net/http.(*persistConn).readLoop(0xc8200ac210)
    /usr/lib/golang/src/net/http/transport.go:976 +0xac7
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:685 +0xc78

goroutine 54 [select]:
net/http.(*persistConn).writeLoop(0xc8200ac210)
    /usr/lib/golang/src/net/http/transport.go:1009 +0x40c
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:686 +0xc9d

goroutine 61 [select]:
net/http.(*persistConn).readLoop(0xc8200e2160)
    /usr/lib/golang/src/net/http/transport.go:976 +0xac7
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:685 +0xc78

goroutine 41 [select]:
net/http.(*persistConn).writeLoop(0xc8200ac2c0)
    /usr/lib/golang/src/net/http/transport.go:1009 +0x40c
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:686 +0xc9d

goroutine 44 [select]:
net/http.(*persistConn).readLoop(0xc82010e0b0)
    /usr/lib/golang/src/net/http/transport.go:976 +0xac7
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:685 +0xc78

goroutine 45 [select]:
net/http.(*persistConn).writeLoop(0xc82010e0b0)
    /usr/lib/golang/src/net/http/transport.go:1009 +0x40c
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:686 +0xc9d

goroutine 59 [select]:
net/http.(*persistConn).readLoop(0xc8200ac370)
    /usr/lib/golang/src/net/http/transport.go:976 +0xac7
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:685 +0xc78

goroutine 60 [select]:
net/http.(*persistConn).writeLoop(0xc8200ac370)
    /usr/lib/golang/src/net/http/transport.go:1009 +0x40c
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:686 +0xc9d

goroutine 22 [select]:
net/http.(*persistConn).readLoop(0xc8200e20b0)
    /usr/lib/golang/src/net/http/transport.go:976 +0xac7
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:685 +0xc78

goroutine 23 [select]:
net/http.(*persistConn).writeLoop(0xc8200e20b0)
    /usr/lib/golang/src/net/http/transport.go:1009 +0x40c
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:686 +0xc9d

goroutine 78 [select]:
net/http.(*persistConn).readLoop(0xc8200e2370)
    /usr/lib/golang/src/net/http/transport.go:976 +0xac7
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:685 +0xc78

goroutine 62 [select]:
net/http.(*persistConn).writeLoop(0xc8200e2160)
    /usr/lib/golang/src/net/http/transport.go:1009 +0x40c
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:686 +0xc9d

goroutine 48 [select]:
net/http.(*persistConn).readLoop(0xc82010e160)
    /usr/lib/golang/src/net/http/transport.go:976 +0xac7
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:685 +0xc78

goroutine 49 [select]:
net/http.(*persistConn).writeLoop(0xc82010e160)
    /usr/lib/golang/src/net/http/transport.go:1009 +0x40c
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:686 +0xc9d

goroutine 28 [select]:
net/http.(*persistConn).readLoop(0xc8200e2210)
    /usr/lib/golang/src/net/http/transport.go:976 +0xac7
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:685 +0xc78

goroutine 29 [select]:
net/http.(*persistConn).writeLoop(0xc8200e2210)
    /usr/lib/golang/src/net/http/transport.go:1009 +0x40c
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:686 +0xc9d

goroutine 70 [select]:
net/http.(*persistConn).readLoop(0xc8200ac420)
    /usr/lib/golang/src/net/http/transport.go:976 +0xac7
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:685 +0xc78

goroutine 68 [select]:
net/http.(*persistConn).readLoop(0xc820170000)
    /usr/lib/golang/src/net/http/transport.go:976 +0xac7
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:685 +0xc78

goroutine 69 [select]:
net/http.(*persistConn).writeLoop(0xc820170000)
    /usr/lib/golang/src/net/http/transport.go:1009 +0x40c
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:686 +0xc9d

goroutine 101 [select]:
net/http.(*persistConn).readLoop(0xc8201702c0)
    /usr/lib/golang/src/net/http/transport.go:976 +0xac7
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:685 +0xc78

goroutine 71 [select]:
net/http.(*persistConn).writeLoop(0xc8200ac420)
    /usr/lib/golang/src/net/http/transport.go:1009 +0x40c
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:686 +0xc9d

goroutine 74 [select]:
net/http.(*persistConn).readLoop(0xc8201700b0)
    /usr/lib/golang/src/net/http/transport.go:976 +0xac7
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:685 +0xc78

goroutine 75 [select]:
net/http.(*persistConn).writeLoop(0xc8201700b0)
    /usr/lib/golang/src/net/http/transport.go:1009 +0x40c
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:686 +0xc9d

goroutine 84 [select]:
net/http.(*persistConn).readLoop(0xc82010e210)
    /usr/lib/golang/src/net/http/transport.go:976 +0xac7
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:685 +0xc78

goroutine 85 [select]:
net/http.(*persistConn).writeLoop(0xc82010e210)
    /usr/lib/golang/src/net/http/transport.go:1009 +0x40c
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:686 +0xc9d

goroutine 99 [select]:
net/http.(*persistConn).readLoop(0xc8200ac4d0)
    /usr/lib/golang/src/net/http/transport.go:976 +0xac7
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:685 +0xc78

goroutine 100 [select]:
net/http.(*persistConn).writeLoop(0xc8200ac4d0)
    /usr/lib/golang/src/net/http/transport.go:1009 +0x40c
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:686 +0xc9d

goroutine 88 [select]:
net/http.(*persistConn).readLoop(0xc82010e2c0)
    /usr/lib/golang/src/net/http/transport.go:976 +0xac7
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:685 +0xc78

goroutine 89 [select]:
net/http.(*persistConn).writeLoop(0xc82010e2c0)
    /usr/lib/golang/src/net/http/transport.go:1009 +0x40c
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:686 +0xc9d

goroutine 80 [select]:
net/http.(*persistConn).readLoop(0xc82010e370)
    /usr/lib/golang/src/net/http/transport.go:976 +0xac7
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:685 +0xc78

goroutine 77 [select]:
net/http.(*persistConn).writeLoop(0xc8200e22c0)
    /usr/lib/golang/src/net/http/transport.go:1009 +0x40c
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:686 +0xc9d

goroutine 122 [select]:
net/http.(*persistConn).readLoop(0xc820170160)
    /usr/lib/golang/src/net/http/transport.go:976 +0xac7
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:685 +0xc78

goroutine 79 [select]:
net/http.(*persistConn).writeLoop(0xc8200e2370)
    /usr/lib/golang/src/net/http/transport.go:1009 +0x40c
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:686 +0xc9d

goroutine 116 [select]:
net/http.(*persistConn).readLoop(0xc8200e2420)
    /usr/lib/golang/src/net/http/transport.go:976 +0xac7
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:685 +0xc78

goroutine 117 [select]:
net/http.(*persistConn).writeLoop(0xc8200e2420)
    /usr/lib/golang/src/net/http/transport.go:1009 +0x40c
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:686 +0xc9d

goroutine 120 [select]:
net/http.(*persistConn).readLoop(0xc8200e24d0)
    /usr/lib/golang/src/net/http/transport.go:976 +0xac7
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:685 +0xc78

goroutine 121 [select]:
net/http.(*persistConn).writeLoop(0xc8200e24d0)
    /usr/lib/golang/src/net/http/transport.go:1009 +0x40c
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:686 +0xc9d

goroutine 81 [select]:
net/http.(*persistConn).writeLoop(0xc82010e370)
    /usr/lib/golang/src/net/http/transport.go:1009 +0x40c
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:686 +0xc9d

goroutine 147 [select]:
net/http.(*persistConn).readLoop(0xc8200e2580)
    /usr/lib/golang/src/net/http/transport.go:976 +0xac7
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:685 +0xc78

goroutine 123 [select]:
net/http.(*persistConn).writeLoop(0xc820170160)
    /usr/lib/golang/src/net/http/transport.go:1009 +0x40c
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:686 +0xc9d

goroutine 134 [select]:
net/http.(*persistConn).readLoop(0xc820170210)
    /usr/lib/golang/src/net/http/transport.go:976 +0xac7
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:685 +0xc78

goroutine 135 [select]:
net/http.(*persistConn).writeLoop(0xc820170210)
    /usr/lib/golang/src/net/http/transport.go:1009 +0x40c
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:686 +0xc9d

goroutine 178 [select]:
net/http.(*persistConn).readLoop(0xc82010e580)
    /usr/lib/golang/src/net/http/transport.go:976 +0xac7
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:685 +0xc78

goroutine 102 [select]:
net/http.(*persistConn).writeLoop(0xc8201702c0)
    /usr/lib/golang/src/net/http/transport.go:1009 +0x40c
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:686 +0xc9d

goroutine 105 [select]:
net/http.(*persistConn).readLoop(0xc8200ac580)
    /usr/lib/golang/src/net/http/transport.go:976 +0xac7
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:685 +0xc78

goroutine 106 [select]:
net/http.(*persistConn).writeLoop(0xc8200ac580)
    /usr/lib/golang/src/net/http/transport.go:1009 +0x40c
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:686 +0xc9d

goroutine 109 [select]:
net/http.(*persistConn).readLoop(0xc8200ac630)
    /usr/lib/golang/src/net/http/transport.go:976 +0xac7
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:685 +0xc78

goroutine 110 [select]:
net/http.(*persistConn).writeLoop(0xc8200ac630)
    /usr/lib/golang/src/net/http/transport.go:1009 +0x40c
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:686 +0xc9d

goroutine 113 [select]:
net/http.(*persistConn).readLoop(0xc8200ac6e0)
    /usr/lib/golang/src/net/http/transport.go:976 +0xac7
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:685 +0xc78

goroutine 146 [select]:
net/http.(*persistConn).writeLoop(0xc8200ac6e0)
    /usr/lib/golang/src/net/http/transport.go:1009 +0x40c
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:686 +0xc9d

goroutine 140 [select]:
net/http.(*persistConn).readLoop(0xc820170370)
    /usr/lib/golang/src/net/http/transport.go:976 +0xac7
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:685 +0xc78

goroutine 141 [select]:
net/http.(*persistConn).writeLoop(0xc820170370)
    /usr/lib/golang/src/net/http/transport.go:1009 +0x40c
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:686 +0xc9d

goroutine 144 [select]:
net/http.(*persistConn).readLoop(0xc820170420)
    /usr/lib/golang/src/net/http/transport.go:976 +0xac7
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:685 +0xc78

goroutine 145 [select]:
net/http.(*persistConn).writeLoop(0xc820170420)
    /usr/lib/golang/src/net/http/transport.go:1009 +0x40c
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:686 +0xc9d

goroutine 94 [select]:
net/http.(*persistConn).readLoop(0xc82010e420)
    /usr/lib/golang/src/net/http/transport.go:976 +0xac7
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:685 +0xc78

goroutine 95 [select]:
net/http.(*persistConn).writeLoop(0xc82010e420)
    /usr/lib/golang/src/net/http/transport.go:1009 +0x40c
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:686 +0xc9d

goroutine 162 [select]:
net/http.(*persistConn).readLoop(0xc82010e4d0)
    /usr/lib/golang/src/net/http/transport.go:976 +0xac7
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:685 +0xc78

goroutine 163 [select]:
net/http.(*persistConn).writeLoop(0xc82010e4d0)
    /usr/lib/golang/src/net/http/transport.go:1009 +0x40c
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:686 +0xc9d

goroutine 179 [select]:
net/http.(*persistConn).writeLoop(0xc82010e580)
    /usr/lib/golang/src/net/http/transport.go:1009 +0x40c
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:686 +0xc9d

goroutine 126 [select]:
net/http.(*persistConn).readLoop(0xc82010e630)
    /usr/lib/golang/src/net/http/transport.go:976 +0xac7
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:685 +0xc78

goroutine 148 [select]:
net/http.(*persistConn).writeLoop(0xc8200e2580)
    /usr/lib/golang/src/net/http/transport.go:1009 +0x40c
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:686 +0xc9d

goroutine 127 [select]:
net/http.(*persistConn).writeLoop(0xc82010e630)
    /usr/lib/golang/src/net/http/transport.go:1009 +0x40c
created by net/http.(*Transport).dialConn
    /usr/lib/golang/src/net/http/transport.go:686 +0xc9d
exit status 2

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duaevb1511 2015-10-30 23:13
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The request is getting an error which you're just ignoring and then you get a nil pointer dereference when you attempt to access the response status in the Printf on the next line.

Here is your example printing the error; http://play.golang.org/p/V8BCrM_Ag7

Every request gets this; Get http://mickle.com.au/wp-content/uploads/2015/03/11222.jpg: dial tcp: Protocol not available

Basically, you need to assign the error to something and check it before you allow execution to continue. The common syntax would look like this;

if response, err := client.Do(req); err != nil { // handles error and return }
本回答被题主选为最佳回答 , 对您是否有帮助呢?

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去http获取高延迟资源时崩溃 http
2015-10-30 22:41

回答 2 已采纳 The request is getting an error which you're just ignoring and then you get a nil pointer derefere
服务器偶尔会出现网络延迟很高的现象服务器网络
2021-09-13 09:23

回答 10 已采纳 CPU占用率高的时候也会导致网络延迟。1.查看程序中是否有内存泄露，有没有及时释放内存2.查看程序中是否有定时触发的功能，如果有，检查定时触发功能的机制是否合理（比如是否有反复消息确认、数据丢包重发，
网络延迟计算单位换算问题 tcp/ip 有问必答网络协议
2022-03-22 16:45

回答 2 已采纳 1S=1000mS1mS=1000μS1us是10的负6次方秒，1M就是一百万10的4次方除以10的7次方等于10的-3次方10的-3次方秒=1ms=1000us
【网络入门】详解常用的基础网络知识（面试笔试常考内容）
2022-04-26 21:26

dvlinker的博客本文结合多年来的工作实践，来详细讲述一下作为IT从业人员要掌握的一些基础网络知识。
如何计算网络延迟，。。。。。 c++
2016-02-14 03:10

回答 1 已采纳最简单的当然是如你所说计算数据发送与接收应答的时间差，但这个时间差肯定是大于网络延时的。用于大概的网络延时计算，是可以的。
为什么Golang http.ResponseWriter执行被延迟？ http
2018-01-15 17:03

回答 2 已采纳 The original concept of the HTTP protocol is a simple request-response server-client computation m
微信小程序——在js中使用this.data.xxxx获取数据有延迟微信小程序
2021-03-23 00:25

回答 2 已采纳 foodList中的数据应该是通过ajax异步方式加载的，onLoad生命周期不会等待异步加载这一过程。 onLoad生命周期会在ajax异步加载数据完成之前执行，这个时间foodList中还没有数
HTTP介绍：一文了解什么是HTTP
2023-09-02 13:13

我是一盘牛肉的博客在当今数字时代，互联网已经成为人们生活中不可或缺的一部分。无论是浏览网页、发送电子邮件还是在线...无论您是开发人员、网络管理员还是普通用户，这篇文章都将为您揭开HTTP的神秘面纱，带您进入网络世界的奥妙之中。
去延迟函数返回值
2019-08-12 16:54

回答 1 已采纳 If DeferFunc1 makes sense to you then DeferFunc3 should as well as they illustrate the same concep
flink消费kafka数据延迟 flink postgresql scala 有问必答
2022-01-28 09:47

回答 1 已采纳那最后写入到库了吗，如果写不进去，上游kafka肯定会延迟越来越大的，可以在sink里多打印下错误，或者设置写入超时时间，问题应该在写入
使用延迟时函数中的返回值
2018-12-25 01:32

回答 1 已采纳 what's the difference between the two functions? The Go Programming Language Specificati
网络安全管理员高级工理论题库（持续更新中）
2023-11-06 10:37

越来越不懂！的博客网络安全管理员高级工理论题库，持续更新中……
微信小程序发送post请求参数获取时出问题. javascript 前端微信小程序
2023-02-22 18:13

回答 3 已采纳还是看下赋值逻辑，是不是还没来的及改变就提交上去了。。或者后面把data有重写的逻辑。。
计算机网络面试题汇总
2021-09-24 15:01

爱上布洛格的鸭鸭的博客 2. OSI的七层模型五层模型的作用 : （字节跳动）TCP、UDP的区别如何在应用层保证udp可靠传输TCP流量控制TCP拥塞控制网络拥塞的原因主要有以下三点:拥塞控制的目的:拥塞控制的方法:拥塞控制的常见算法:1.慢开始2.拥塞...
计算机网络常见面试题总结
2021-04-06 00:52

张维鹏的博客计算机网络模型： TCP/IP 与 OSI 都是为了使网络中的两台计算机能够互相连接并实现通信与回应，但他们最大的不同在于，OSI 是一个理论上的网络通信模型，而 TCP/IP 则是实际上的网络通信标准。一、OSI七层模型...
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去http获取高延迟资源时崩溃

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