80b45bf034
* feat: support shortened exchange urls * feat: add shortener processing for exchange /a/:id conventions
59 lines
1.3 KiB
Go
59 lines
1.3 KiB
Go
package routes
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import (
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"fmt"
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"net/http"
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"os"
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"strings"
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"github.com/gin-gonic/gin"
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"github.com/go-resty/resty/v2"
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)
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func RedirectShortenedOverflowURL(c *gin.Context) {
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id := c.Param("id")
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answerId := c.Param("answerId")
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sub := c.Param("sub")
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// fetch the stack overflow URL
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client := resty.New()
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client.SetRedirectPolicy(
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resty.RedirectPolicyFunc(func(req *http.Request, via []*http.Request) error {
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return http.ErrUseLastResponse
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}),
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)
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domain := "www.stackoverflow.com"
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if strings.Contains(sub, ".") {
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domain = sub
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} else if sub != "" {
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domain = fmt.Sprintf("%s.stackexchange.com", sub)
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}
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resp, err := client.R().Get(fmt.Sprintf("https://%s/a/%s/%s", domain, id, answerId))
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if err != nil {
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c.HTML(400, "home.html", gin.H{
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"errorMessage": "Unable to fetch stack overflow URL",
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"theme": c.MustGet("theme").(string),
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})
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return
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}
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if resp.StatusCode() != 302 {
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c.HTML(400, "home.html", gin.H{
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"errorMessage": fmt.Sprintf("Unexpected HTTP status from origin: %d", resp.StatusCode()),
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"theme": c.MustGet("theme").(string),
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})
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return
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}
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// get the redirect URL
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location := resp.Header().Get("Location")
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redirectPrefix := os.Getenv("APP_URL")
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if sub != "" {
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redirectPrefix += fmt.Sprintf("/exchange/%s", sub)
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}
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c.Redirect(302, fmt.Sprintf("%s%s", redirectPrefix, location))
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}
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