sendListing() — netty Function Reference

Architecture documentation for the sendListing() function in Http2StaticFileServerHandler.java from the netty codebase.

Function java Buffer Telemetry called by 1

Entity Profile

Buffer→ Telemetry→ sendListing() — netty Function Reference

Dependency Diagram

graph TD
  d930130d_166e_d545_8a2f_33a40d608cd0["sendListing()"]
  0106d702_a5aa_70a0_2d44_3e8c79971862["Http2StaticFileServerHandler"]
  d930130d_166e_d545_8a2f_33a40d608cd0 -->|defined in| 0106d702_a5aa_70a0_2d44_3e8c79971862
  f3d3a002_604b_1387_a2bd_93edd96b6d76["channelRead()"]
  f3d3a002_604b_1387_a2bd_93edd96b6d76 -->|calls| d930130d_166e_d545_8a2f_33a40d608cd0
  style d930130d_166e_d545_8a2f_33a40d608cd0 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

example/src/main/java/io/netty/example/http2/file/Http2StaticFileServerHandler.java lines 251–297

    private void sendListing(ChannelHandlerContext ctx, File dir, String dirPath) {
        StringBuilder buf = new StringBuilder()
                .append("<!DOCTYPE html>\r\n")
                .append("<html><head><meta charset='utf-8' /><title>")
                .append("Listing of: ")
                .append(dirPath)
                .append("</title></head><body>\r\n")

                .append("<h3>Listing of: ")
                .append(dirPath)
                .append("</h3>\r\n")

                .append("<ul>")
                .append("<li><a href=\"../\">..</a></li>\r\n");

        File[] files = dir.listFiles();
        if (files != null) {
            for (File f : files) {
                if (f.isHidden() || !f.canRead()) {
                    continue;
                }

                String name = f.getName();
                if (!ALLOWED_FILE_NAME.matcher(name).matches()) {
                    continue;
                }

                buf.append("<li><a href=\"")
                        .append(name)
                        .append("\">")
                        .append(name)
                        .append("</a></li>\r\n");
            }
        }

        buf.append("</ul></body></html>\r\n");

        ByteBuf buffer = ctx.alloc().buffer(buf.length());
        buffer.writeCharSequence(buf.toString(), CharsetUtil.UTF_8);

        Http2Headers headers = new DefaultHttp2Headers();
        headers.status(OK.toString());
        headers.add(HttpHeaderNames.CONTENT_TYPE, "text/html; charset=UTF-8");

        ctx.write(new DefaultHttp2HeadersFrame(headers).stream(stream));
        ctx.writeAndFlush(new DefaultHttp2DataFrame(buffer, true).stream(stream));
    }