142 lines
4.0 KiB
Go
142 lines
4.0 KiB
Go
package middleware
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import (
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"bufio"
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"bytes"
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"net"
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"net/http"
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"strconv"
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"strings"
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swaggerFiles "github.com/swaggo/files"
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"github.com/gin-gonic/gin"
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)
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func SwaggerHandler() gin.HandlerFunc {
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return func(c *gin.Context) {
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rawPath := c.Request.URL.Path
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relPath := strings.TrimPrefix(rawPath, "/swagger")
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if relPath == "" || relPath == "/" {
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c.Request.URL.Path = "/index.html"
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} else {
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c.Request.URL.Path = relPath
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}
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isCSS := strings.HasSuffix(relPath, "swagger-ui.css")
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if isCSS {
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crw := &captureResponseWriter{
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ginWriter: c.Writer,
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code: 200,
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}
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c.Writer = crw
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swaggerFiles.Handler.ServeHTTP(crw, c.Request)
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c.Writer = crw.ginWriter
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if crw.code == 200 && crw.buf.Len() > 0 {
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body := append(crw.buf.Bytes(), []byte(brandingCSS)...)
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c.Header("Content-Length", strconv.Itoa(len(body)))
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c.Header("Content-Type", "text/css; charset=utf-8")
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c.Writer.WriteHeader(crw.code)
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c.Writer.Write(body)
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c.Request.URL.Path = rawPath
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return
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}
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if crw.buf.Len() > 0 {
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c.Writer.WriteHeader(crw.code)
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c.Writer.Write(crw.buf.Bytes())
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c.Request.URL.Path = rawPath
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return
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}
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c.Writer.WriteHeader(crw.code)
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c.Request.URL.Path = rawPath
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return
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}
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swaggerFiles.Handler.ServeHTTP(c.Writer, c.Request)
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c.Request.URL.Path = rawPath
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}
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}
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type captureResponseWriter struct {
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ginWriter gin.ResponseWriter
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code int
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buf bytes.Buffer
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}
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func (w *captureResponseWriter) Header() http.Header { return w.ginWriter.Header() }
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func (w *captureResponseWriter) Write(b []byte) (int, error) { return w.buf.Write(b) }
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func (w *captureResponseWriter) WriteHeader(code int) { w.code = code }
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func (w *captureResponseWriter) WriteString(s string) (int, error) { return w.buf.WriteString(s) }
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func (w *captureResponseWriter) Status() int { return w.code }
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func (w *captureResponseWriter) Size() int { return w.buf.Len() }
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func (w *captureResponseWriter) Written() bool { return w.buf.Len() > 0 }
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func (w *captureResponseWriter) WriteHeaderNow() {}
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func (w *captureResponseWriter) Pusher() http.Pusher { return nil }
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func (w *captureResponseWriter) Hijack() (net.Conn, *bufio.ReadWriter, error) {
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return w.ginWriter.Hijack()
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}
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func (w *captureResponseWriter) CloseNotify() <-chan bool { return w.ginWriter.CloseNotify() }
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func (w *captureResponseWriter) Flush() {}
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const brandingCSS = `
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/* MengStack API branding — replace Swagger SmartBear logo */
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.topbar {
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display: flex !important;
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align-items: center !important;
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background-color: #1b1b1f !important;
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padding: 8px 20px !important;
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min-height: 50px !important;
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position: relative !important;
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}
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.topbar > * {
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visibility: hidden !important;
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width: 0 !important;
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height: 0 !important;
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overflow: hidden !important;
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margin: 0 !important;
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padding: 0 !important;
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flex: 0 !important;
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}
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.topbar::before {
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content: "MengStack API \6587\6863" !important;
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visibility: visible !important;
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width: auto !important;
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height: auto !important;
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overflow: visible !important;
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flex: 0 0 auto !important;
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color: #fff !important;
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font-size: 20px !important;
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font-weight: 700 !important;
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font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif !important;
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letter-spacing: 1px !important;
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text-decoration: none !important;
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position: absolute !important;
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left: 20px !important;
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top: 50% !important;
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transform: translateY(-50%) !important;
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}
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.topbar::after {
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content: "v0.3.0" !important;
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visibility: visible !important;
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width: auto !important;
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height: auto !important;
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overflow: visible !important;
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flex: 0 0 auto !important;
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color: rgba(255,255,255,0.5) !important;
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font-size: 12px !important;
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font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif !important;
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position: absolute !important;
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left: 230px !important;
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top: 50% !important;
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transform: translateY(-50%) !important;
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}
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.swagger-ui {
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margin-top: 0 !important;
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}
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`
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