go

Golang Socket编程

由 余生长醉 提交于 2020-12-07 06:23:23
Socket编程 在很多底层网络应用开发者的眼里一切编程都是Socket，话虽然有点夸张，但却也几乎如此了，现在的网络编程几乎都是用Socket来编程。你想过这些情景么？我们每天打开浏览器浏览网页时，浏览器进程怎么和Web服务器进行通信的呢？当你用QQ聊天时，QQ进程怎么和服务器或者是你的好友所在的QQ进程进行通信的呢？当你打开PPstream观看视频时，PPstream进程如何与视频服务器进行通信的呢？ 如此种种，都是靠Socket来进行通信的，以一斑窥全豹，可见Socket编程在现代编程中占据了多么重要的地位，这一节我们将介绍Go语言中如何进行Socket编程。 什么是Socket？ Socket起源于Unix，而Unix基本哲学之一就是“一切皆文件”，都可以用“打开open –> 读写write/read –> 关闭close”模式来操作。Socket就是该模式的一个实现，网络的Socket数据传输是一种特殊的I/O，Socket也是一种文件描述符。Socket也具有一个类似于打开文件的函数调用：Socket()，该函数返回一个整型的Socket描述符，随后的连接建立、数据传输等操作都是通过该Socket实现的。 常用的Socket类型有两种：流式Socket（SOCK_STREAM）和数据报式Socket（SOCK_DGRAM）。流式是一种面向连接的Socket

golang udp connection refused on every other write

由 落爺英雄遲暮 提交于 2020-12-07 05:14:52
问题 I ran this UDP client program on ubuntu linux 16.04: package main import ( "fmt" "net" "time" "strconv" ) func CheckError(err error) { if err != nil { fmt.Println("Error: " , err) } } func main() { ServerAddr,err := net.ResolveUDPAddr("udp","127.0.0.1:10001") CheckError(err) LocalAddr, err := net.ResolveUDPAddr("udp", "127.0.0.1:0") CheckError(err) Conn, err := net.DialUDP("udp", LocalAddr, ServerAddr) CheckError(err) defer Conn.Close() i := 0 for { msg := strconv.Itoa(i) i++ buf := []byte

golang udp connection refused on every other write

由 家住魔仙堡 提交于 2020-12-07 05:14:18
问题 I ran this UDP client program on ubuntu linux 16.04: package main import ( "fmt" "net" "time" "strconv" ) func CheckError(err error) { if err != nil { fmt.Println("Error: " , err) } } func main() { ServerAddr,err := net.ResolveUDPAddr("udp","127.0.0.1:10001") CheckError(err) LocalAddr, err := net.ResolveUDPAddr("udp", "127.0.0.1:0") CheckError(err) Conn, err := net.DialUDP("udp", LocalAddr, ServerAddr) CheckError(err) defer Conn.Close() i := 0 for { msg := strconv.Itoa(i) i++ buf := []byte

golang udp connection refused on every other write

由 旧巷老猫 提交于 2020-12-07 05:12:36
问题 I ran this UDP client program on ubuntu linux 16.04: package main import ( "fmt" "net" "time" "strconv" ) func CheckError(err error) { if err != nil { fmt.Println("Error: " , err) } } func main() { ServerAddr,err := net.ResolveUDPAddr("udp","127.0.0.1:10001") CheckError(err) LocalAddr, err := net.ResolveUDPAddr("udp", "127.0.0.1:0") CheckError(err) Conn, err := net.DialUDP("udp", LocalAddr, ServerAddr) CheckError(err) defer Conn.Close() i := 0 for { msg := strconv.Itoa(i) i++ buf := []byte

golang udp connection refused on every other write

由 吃可爱长大的小学妹 提交于 2020-12-07 05:12:19
问题 I ran this UDP client program on ubuntu linux 16.04: package main import ( "fmt" "net" "time" "strconv" ) func CheckError(err error) { if err != nil { fmt.Println("Error: " , err) } } func main() { ServerAddr,err := net.ResolveUDPAddr("udp","127.0.0.1:10001") CheckError(err) LocalAddr, err := net.ResolveUDPAddr("udp", "127.0.0.1:0") CheckError(err) Conn, err := net.DialUDP("udp", LocalAddr, ServerAddr) CheckError(err) defer Conn.Close() i := 0 for { msg := strconv.Itoa(i) i++ buf := []byte

How to extend a template in go?

由 不打扰是莪最后的温柔 提交于 2020-12-07 04:53:48
问题 Here is the problem: There are several article s on each page's content section and I'd like to insert a likebar template below each article. So the base.tmpl is like: <html> <head> {{template "head.tmpl" .}} </head> <body> {{template "content.tmpl" .}} </body> </html> and in article.tmpl I want to have : {{define "content"}} <div>article 1 {{template "likebar.tmpl" .}} </div> <div>article 2 {{template "likebar.tmpl" .}} </div> ... //these divs are generated dynamically {{end}} How can I

How to extend a template in go?

由 巧了我就是萌 提交于 2020-12-07 04:51:08
问题 Here is the problem: There are several article s on each page's content section and I'd like to insert a likebar template below each article. So the base.tmpl is like: <html> <head> {{template "head.tmpl" .}} </head> <body> {{template "content.tmpl" .}} </body> </html> and in article.tmpl I want to have : {{define "content"}} <div>article 1 {{template "likebar.tmpl" .}} </div> <div>article 2 {{template "likebar.tmpl" .}} </div> ... //these divs are generated dynamically {{end}} How can I

How to extend a template in go?

由 。_饼干妹妹 提交于 2020-12-07 04:49:31
问题 Here is the problem: There are several article s on each page's content section and I'd like to insert a likebar template below each article. So the base.tmpl is like: <html> <head> {{template "head.tmpl" .}} </head> <body> {{template "content.tmpl" .}} </body> </html> and in article.tmpl I want to have : {{define "content"}} <div>article 1 {{template "likebar.tmpl" .}} </div> <div>article 2 {{template "likebar.tmpl" .}} </div> ... //these divs are generated dynamically {{end}} How can I

英语影视台词---绿皮书（2）（利普 我以为你要把那家伙打死了）

由 孤街浪徒 提交于 2020-12-07 00:55:02
英语影视台词---绿皮书（2）（利普 我以为你要把那家伙打死了） 一、总结 一句话总结： Lip, I thought you were gonna kill that guy. 1、你也敢动我 你个小瘪三？ You put your hands on me, you punk? 2、你别找麻烦了 带上朋友回家吧？ Do yourself a favor. Go home with your friends. 3、还轮不到你指挥我 你知道我是谁吗 我要进去？ You don't tell me where to go! Do you know who I am?! I'm goin' back in there! 4、告诉朱利·波戴尔 我要是找不到帽子 就把这地方一把火烧了？ You tell Julely Podell. If I don't get my hat I'm gonna burn this joint down. You hear me?! 5、会找到的 我保证肯定会找到？ I swear to God it's gonna turn up. 6、是吗 告诉那个死犹太肥佬 帽子没了 我就把科帕烧了？ Really? You tell that fat Jew bastard I don't get my hat, I'll burn the Copa down! 7

How can I serve files while using GRPC

由 China☆狼群 提交于 2020-12-06 08:25:40
问题 Is there any way how to serve files in Go with GRPC, like in gin-gonic's variant: router.Static("/static", "/var/www") 回答1: You can't do it exactly like that. But you can use the proto bytes type and put the file bytes in that field. Also (as pointed out in the comments) with large files you should use streaming instead of a unary call. (most GRPC implementation have a limit of 4MB per message). Proto example: syntax = "proto3"; message Response { bytes fileChunk = 1; } message Request {
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