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digraph state {
edge [color=green];
connect -> reqstart -> read -> reqend -> handlereq -> respstart -> write -> respend -> connect;
edge [color=grey];
reqend -> readpost -> handlereq [ label="POST" ];
edge [ color=blue]
respend -> reqstart [ label="keep-alive" ];
edge [ color=lightblue]
handlereq -> handlereq [ label="sub-request" ];
edge [style=dashed, color=red];
error -> close -> connect;
error -> connect;
handlereq -> error;
read -> error;
readpost -> error;
write -> error;
connect [shape=box];
}
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