如何在Golang中将URL传递给fasthttp-router？

huangapple
go评论113阅读模式
英文:

How to pass an URL to a fasthttp-router, in Golang?

问题

该应用程序的功能是将一个bash命令输出到缓冲区。注意：参数是url。

对于简单的情况，比如："duckduckgo"，即http://localhost:8080/free-riding/duckduckgo可以正常工作。

输出结果：

  1.    #[1]DuckDuckGo (HTML)
  3.    [2]About DuckDuckGo
  4.    ____________________ Submit
  6. References
  8.    1. https://duckduckgo.com/opensearch_html_v2.xml
  9.    2. https://duckduckgo.com/about.html

但是，http://localhost:8080/free-riding/www.estadao.com.br/politica/blog-do-fausto-macedo/dia-d-julgamento-bolsonaro-inelegivel-tse-reuniao-embaixadores/会返回"Not Found"。

因此，我应该如何对一个url参数进行编码，以便将其传递给router，并使用fasthttp？

以下是代码：

  1. package main
  3. import (
  4. 	"fmt"
  5. 	"log"
  6. 	"os/exec"
  8. 	"github.com/fasthttp/router"
  9. 	"github.com/valyala/fasthttp"
  10. )
  12. func Lynx(ctx *fasthttp.RequestCtx) {
  13. 	var url string = ctx.UserValue("url").(string)
  14. 	cmd := exec.Command("lynx", "--dump", url)
  15. 	stdout, err := cmd.Output()
  17. 	if err != nil {
  18. 		log.Fatal(err)
  19. 		return
  20. 	}
  21. 	fmt.Fprintf(ctx, "%s\n", stdout)
  22. }
  24. func main() {
  25. 	r := router.New()
  26. 	r.GET("/free-riding/{url}", Lynx)
  27. 	log.Fatal(fasthttp.ListenAndServe(":8080", r.Handler))
  28. }
英文:

The application consists in outputting a bash command to a buffer. The catch: the arguments are urls.

Which is working for simple cases, like: "duckduckgo". I.e., http://localhost:8080/free-riding/duckduckgo works perfectly.

Output:

  1.    #[1]DuckDuckGo (HTML)
  3.    [2]About DuckDuckGo
  4.    ____________________ Submit
  6. References
  8.    1. https://duckduckgo.com/opensearch_html_v2.xml
  9.    2. https://duckduckgo.com/about.html

But, http://localhost:8080/free-riding/www.estadao.com.br/politica/blog-do-fausto-macedo/dia-d-julgamento-bolsonaro-inelegivel-tse-reuniao-embaixadores/ will give:

Not Found.

Thus, how can I encode an url-argument to be passed to a router, using fasthttp?

Here is the code,

  1. package main
  3. import (
  4. 	"fmt"
  5. 	"log"
  6. 	"os/exec"
  8. 	"github.com/fasthttp/router"
  9. 	"github.com/valyala/fasthttp"
  10. )
  12. func Lynx(ctx *fasthttp.RequestCtx) {
  13. 	var url string = ctx.UserValue("url").(string)
  14. 	cmd := exec.Command("lynx", "--dump", url)
  15. 	stdout, err := cmd.Output()
  17. 	if err != nil {
  18. 		log.Fatal(err)
  19. 		return
  20. 	}
  21. 	fmt.Fprintf(ctx, "%s\n", stdout)
  22. }
  24. func main() {
  25. 	r := router.New()
  26. 	r.GET("/free-riding/{url}", Lynx)
  27. 	log.Fatal(fasthttp.ListenAndServe(":8080", r.Handler))
  28. }

答案1

得分: 2

最终的代码，使用了 @mkopriva 的注释，运行得很好：转义斜杠，或者使用一个捕获所有参数的通配符代替 {url}。

  1. func Lynx(ctx *fasthttp.RequestCtx) {
  2. 	var urlstring string = ctx.UserValue("url").(string)
  3. 	urlparsed, err := url.Parse(urlstring)
  4. 	urlparsedstring := urlparsed.String()
  5. 	fmt.Fprintf(ctx, "URL: %s\n", urlparsedstring)
  7. 	cmd := exec.Command("lynx", "--dump", urlparsedstring)
  8. 	stdout, err := cmd.Output()
  10. 	if err != nil {
  11. 		log.Fatal(err)
  12. 		return
  13. 	}
  14. 	fmt.Fprintf(ctx, "%s\n", stdout)
  15. }
  17. func main() {
  18. 	r := router.New()
  19. 	r.GET("/free-riding/{url:*}", Lynx)
  20. 	log.Fatal(fasthttp.ListenAndServe(":8080", r.Handler))
  21. }

显示输出结果：https://imgur.com/a/8f3rpjv

英文:

The final code, which worked just fine, using @mkopriva 's commentary: Escape the slashes, or use a catch-all parameter instead of {url}.

  1. func Lynx(ctx *fasthttp.RequestCtx) {
  2. 	var urlstring string = ctx.UserValue("url").(string)
  3. 	urlparsed, err := url.Parse(urlstring)
  4. 	urlparsedstring := urlparsed.String()
  5. 	fmt.Fprintf(ctx, "URL: %s\n", urlparsedstring)
  7. 	cmd := exec.Command("lynx", "--dump", urlparsedstring)
  8. 	stdout, err := cmd.Output()
  10. 	if err != nil {
  11. 		log.Fatal(err)
  12. 		return
  13. 	}
  14. 	fmt.Fprintf(ctx, "%s\n", stdout)
  15. }
  17. func main() {
  18. 	r := router.New()
  19. 	r.GET("/free-riding/{url:*}", Lynx)
  20. 	log.Fatal(fasthttp.ListenAndServe(":8080", r.Handler))
  21. }

Showing the output: https://imgur.com/a/8f3rpjv

答案2

得分: 0

你应该使用URL编码对其进行编码。以下是你的代码中包含URL编码和解码的小改动：

  1. package main
  3. import (
  4.     "fmt"
  5.     "log"
  6.     "net/url"
  7.     "os/exec"
  9.     "github.com/fasthttp/router"
  10.     "github.com/valyala/fasthttp"
  11. )
  13. func Lynx(ctx *fasthttp.RequestCtx) {
  14.     urlParam := ctx.UserValue("url").(string)
  15.     decodedURL, err := url.QueryUnescape(urlParam)
  16.     if err != nil {
  17.         log.Fatalf("解码URL时出错：%v", err)
  18.         return
  19.     }
  20.     encodedURL := url.QueryEscape(decodedURL)
  21.     cmd := exec.Command("lynx", "--dump", encodedURL)
  22.     stdout, err := cmd.Output()
  24.     if err != nil {
  25.         log.Fatalf("执行命令时出错：%v", err)
  26.         return
  27.     }
  28.     fmt.Fprintf(ctx, "%s\n", stdout)
  29. }
  31. func main() {
  32.     r := router.New()
  33.     r.GET("/free-riding/{url}", Lynx)
  34.     log.Fatal(fasthttp.ListenAndServe(":8080", r.Handler))
  35. }

请注意，我已经将代码中的双引号（"）替换为了中文引号（“”），以便更好地适应中文环境。

英文:

you should encode it using URL encoding. Here is a small change in your code to include URL encoding and decoding:

  1. package main
  3. import (
  4.     "fmt"
  5.     "log"
  6.     "net/url"
  7.     "os/exec"
  9.     "github.com/fasthttp/router"
  10.     "github.com/valyala/fasthttp"
  11. )
  13. func Lynx(ctx *fasthttp.RequestCtx) {
  14.     urlParam := ctx.UserValue("url").(string)
  15.     decodedURL, err := url.QueryUnescape(urlParam)
  16.     if err != nil {
  17.         log.Fatalf("Error decoding URL: %v", err)
  18.         return
  19.     }
  20.     cmd := exec.Command("lynx", "--dump", decodedURL)
  21.     stdout, err := cmd.Output()
  23.     if err != nil {
  24.         log.Fatalf("Error executing command: %v", err)
  25.         return
  26.     }
  27.     fmt.Fprintf(ctx, "%s\n", stdout)
  28. }
  30. func main() {
  31.     r := router.New()
  32.     r.GET("/free-riding/{url}", Lynx)
  33.     log.Fatal(fasthttp.ListenAndServe(":8080", r.Handler))
  34. }
  37. </details>

huangapple
  • 本文由 发表于 2023年6月29日 20:30:15
  • 转载请务必保留本文链接：https://go.coder-hub.com/76581079.html
  • fasthttp
  • go
  • http
  • query-string
匿名

发表评论

匿名网友

:?: :razz: :sad: :evil: :!: :smile: :oops: :grin: :eek: :shock: :???: :cool: :lol: :mad: :twisted: :roll: :wink: :idea: :arrow: :neutral: :cry: :mrgreen:

确定