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package markdown |
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import ( |
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"net/http" |
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"strconv" |
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"gopkg.in/russross/blackfriday.v2" |
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"bitbucket.org/lightcodelabs/caddy2" |
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"bitbucket.org/lightcodelabs/caddy2/modules/caddyhttp" |
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) |
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func init() { |
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caddy2.RegisterModule(caddy2.Module{ |
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Name: "http.middleware.markdown", |
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New: func() interface{} { return new(Markdown) }, |
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}) |
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} |
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// Markdown is a middleware for rendering a Markdown response body.
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type Markdown struct { |
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} |
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func (m Markdown) ServeHTTP(w http.ResponseWriter, r *http.Request, next caddyhttp.Handler) error { |
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mrw := &markdownResponseWriter{ |
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ResponseWriterWrapper: &caddyhttp.ResponseWriterWrapper{ResponseWriter: w}, |
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} |
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return next.ServeHTTP(mrw, r) |
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} |
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type markdownResponseWriter struct { |
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*caddyhttp.ResponseWriterWrapper |
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statusCode int |
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wroteHeader bool |
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} |
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func (mrw *markdownResponseWriter) WriteHeader(code int) { |
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mrw.statusCode = code |
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} |
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func (mrw *markdownResponseWriter) Write(d []byte) (int, error) { |
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output := blackfriday.Run(d) |
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if !mrw.wroteHeader { |
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mrw.Header().Set("Content-Length", strconv.Itoa(len(output))) |
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mrw.Header().Set("Content-Type", "text/html; charset=utf-8") |
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mrw.WriteHeader(mrw.statusCode) |
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mrw.wroteHeader = true |
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} |
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return mrw.ResponseWriter.Write(output) |
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} |
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// Interface guard
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var _ caddyhttp.MiddlewareHandler = (*Markdown)(nil) |
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