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fix: explicitly set Content-Type for swagger static files
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MengStack Dev 2026-10-03 04:11:34 +08:00
parent d26f5962ed
commit 10d3342f74
1 changed files with 16 additions and 9 deletions
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25
internal/app/middleware/swagger.go
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@ -3,8 +3,10 @@ package middleware
import (
"bufio"
"bytes"
"mime"
"net"
"net/http"
"path/filepath"
"strconv"
"strings"
@ -12,8 +14,6 @@ import (
"github.com/gin-gonic/gin"
)
// SwaggerHandler serves Swagger UI with relaxed CSP headers and MengStack
// branding CSS injected into swagger-ui.css.
func SwaggerHandler() gin.HandlerFunc {
return func(c *gin.Context) {
rawPath := c.Request.URL.Path
@ -37,21 +37,28 @@ func SwaggerHandler() gin.HandlerFunc {
c.Writer = underlying
c.Header("X-Content-Type-Options", "nosniff")
c.Header("X-Frame-Options", "DENY")
c.Header("X-XSS-Protection", "1; mode=block")
c.Header("Referrer-Policy", "strict-origin-when-cross-origin")
c.Header("Content-Security-Policy", "default-src 'self'; style-src 'self' 'unsafe-inline'; img-src 'self' data:; font-src 'self' data:")
h := underlying.Header()
h.Set("X-Content-Type-Options", "nosniff")
h.Set("X-Frame-Options", "DENY")
h.Set("X-XSS-Protection", "1; mode=block")
h.Set("Referrer-Policy", "strict-origin-when-cross-origin")
h.Set("Content-Security-Policy", "default-src 'self'; style-src 'self' 'unsafe-inline'; img-src 'self' data:; font-src 'self' data:")
if isCSS && crw.code == 200 && crw.buf.Len() > 0 {
body := append(crw.buf.Bytes(), []byte(brandingCSS)...)
c.Header("Content-Length", strconv.Itoa(len(body)))
c.Header("Content-Type", "text/css; charset=utf-8")
h.Set("Content-Length", strconv.Itoa(len(body)))
h.Set("Content-Type", "text/css; charset=utf-8")
underlying.WriteHeader(crw.code)
underlying.Write(body)
return
}
if crw.buf.Len() > 0 {
ext := filepath.Ext(relPath)
if ct := mime.TypeByExtension(ext); ct != "" {
h.Set("Content-Type", ct)
}
h.Del("Content-Length")
underlying.WriteHeader(crw.code)
underlying.Write(crw.buf.Bytes())
return