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700d9e88ad
It is now possible to intercept HTTP messages from a lua action and reply to clients. To do so, a reply object must be provided to the function txn:done(). It may contain a status code with a reason, a header list and a body. By default, if an empty reply object is used, an empty 200 response is returned. If no reply is passed when txn:done() is called, the previous behaviour is respected, the transaction is terminated and nothing is returned to the client. The same is done for TCP streams. When txn:done() is called, the action is terminated with the code ACT_RET_DONE on success and ACT_RET_ERR on error, interrupting the message analysis. The reply object may be created for the lua, by hand. Or txn:reply() may be called. If so, this object provides some methods to fill it: * Reply:set_status(<status> [ <reason>]) : Set the status and optionally the reason. If no reason is provided, the default one corresponding to the status code is used. * Reply:add_header(<name>, <value>) : Add a header. For a given name, the values are stored in an ordered list. * Reply:del_header(<name>) : Removes all occurrences of a header name. * Reply:set_body(<body>) : Set the reply body. Here are some examples, all doing the same: -- ex. 1 txn:done{ status = 400, reason = "Bad request", headers = { ["content-type"] = { "text/html" }, ["cache-control"] = { "no-cache", "no-store" }, }, body = "<html><body><h1>invalid request<h1></body></html>" } -- ex. 2 local reply = txn:reply{ status = 400, reason = "Bad request", headers = { ["content-type"] = { "text/html" }, ["cache-control"] = { "no-cache", "no-store" } }, body = "<html><body><h1>invalid request<h1></body></html>" } txn:done(reply) -- ex. 3 local reply = txn:reply() reply:set_status(400, "Bad request") reply:add_header("content-length", "text/html") reply:add_header("cache-control", "no-cache") reply:add_header("cache-control", "no-store") reply:set_body("<html><body><h1>invalid request<h1></body></html>") txn:done(reply) |
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.. | ||
design-thoughts | ||
internals | ||
lua-api | ||
51Degrees-device-detection.txt | ||
acl.fig | ||
architecture.txt | ||
close-options.txt | ||
coding-style.txt | ||
configuration.txt | ||
cookie-options.txt | ||
DeviceAtlas-device-detection.txt | ||
gpl.txt | ||
haproxy.1 | ||
intro.txt | ||
lgpl.txt | ||
linux-syn-cookies.txt | ||
lua.txt | ||
management.txt | ||
netscaler-client-ip-insertion-protocol.txt | ||
network-namespaces.txt | ||
peers-v2.0.txt | ||
peers.txt | ||
proxy-protocol.txt | ||
queuing.fig | ||
regression-testing.txt | ||
seamless_reload.txt | ||
SOCKS4.protocol.txt | ||
SPOE.txt | ||
WURFL-device-detection.txt |