moonbridge

annotate example_application.lua @ 13:96b6c31d72e3

Emptied prepare method and use request:send_text_status_response(...) in example_application.lua
author jbe
date Thu Jan 29 16:53:02 2015 +0100 (2015-01-29)
parents 0c951f8ee92b
children 1fc0142c32e4
rev   line source
jbe@0 1 -- Moonbridge example application
jbe@0 2 -- invoke with ./moonbridge example_application.lua
jbe@0 3
jbe@4 4 local http = require "moonbridge_http"
jbe@0 5
jbe@13 6 local documents = {}
jbe@13 7 for i, document_name in ipairs{"example_webpage.html", "example_webpage.css"} do
jbe@13 8 local file = assert(io.open(document))
jbe@13 9 documents[document_name] = file:read("*a")
jbe@13 10 file:close()
jbe@13 11 end
jbe@0 12
jbe@0 13 listen{
jbe@0 14 -- listen to a tcp version 4 socket
jbe@0 15 { proto = "tcp4", port = 8080, localhost = true },
jbe@0 16
jbe@0 17 -- listen to a tcp version 6 socket
jbe@0 18 { proto = "tcp6", port = 8080, localhost = true },
jbe@0 19
jbe@0 20 -- listen to a unix domain socket
jbe@0 21 --{ proto = "local", path = 'socket' },
jbe@0 22
jbe@0 23 -- execute the listener regularly (without incoming connection)
jbe@0 24 --{ proto = "interval", name = "myint", delay = 10, strict = false },
jbe@0 25
jbe@0 26 -- desired number of spare (idle) processes
jbe@0 27 pre_fork = 1, -- number of forks
jbe@0 28
jbe@0 29 -- minimum number of processes
jbe@0 30 min_fork = 2, -- number of forks
jbe@0 31
jbe@0 32 -- maximum number of processes (hard limit)
jbe@0 33 max_fork = 16, -- number of forks
jbe@0 34
jbe@0 35 -- delay between creation of spare processes
jbe@0 36 fork_delay = 1, -- seconds
jbe@0 37
jbe@0 38 -- delay before retry of failed process creation
jbe@0 39 fork_error_delay = 2, -- seconds
jbe@0 40
jbe@0 41 -- delay between destruction of excessive spare processes
jbe@0 42 exit_delay = 60, -- seconds
jbe@0 43
jbe@0 44 -- idle time after a fork gets terminated
jbe@0 45 idle_timeout = 0, -- seconds (0 for no timeout)
jbe@0 46
jbe@0 47 -- maximum memory consumption before process gets terminated
jbe@0 48 memory_limit = 1024*1024, -- bytes
jbe@0 49
jbe@11 50 -- preparation of process (executed after fork)
jbe@0 51 prepare = function()
jbe@0 52 end,
jbe@0 53
jbe@0 54 -- connection handler
jbe@0 55 connect = http.generate_handler(
jbe@0 56 {
jbe@0 57 static_headers = {"Server: Moonbridge Example Server"},
jbe@0 58 request_body_size_limit = 16*1024*1024*1024 -- allow big file uploads
jbe@0 59 },
jbe@0 60 function(request)
jbe@0 61
jbe@0 62 if request.method == "GET" or request.method == "HEAD" then
jbe@0 63
jbe@10 64 if request.path == "" then
jbe@0 65 request:send_status("303 See Other")
jbe@0 66 request:send_header("Location", "http://" .. request.headers_value.host .. "/example_webpage.html")
jbe@0 67
jbe@0 68 else
jbe@10 69 local document_name = request.path
jbe@0 70 local document_extension = string.match(document_name, "%.([^.])$")
jbe@10 71 local document = documents[document_name]
jbe@0 72 if document then
jbe@0 73 request:send_status("200 OK")
jbe@0 74
jbe@0 75 if document_extension == "html" then
jbe@0 76 request:send_header("Content-Type", "text/html; charset=UTF-8")
jbe@0 77 elseif document_extension == "css" then
jbe@0 78 request:send_header("Content-Type", "text/css; charset=UTF-8")
jbe@0 79 end
jbe@0 80 request:send_data(document)
jbe@0 81 else
jbe@0 82 request:send_status("404 Not Found")
jbe@0 83 request:send_header("Content-Type", "text/html; chatset=UTF-8")
jbe@0 84 request:send_data("<html><head><title>404 Not Found</title></head><body><h1>404 Not Found</h1></body></html>")
jbe@0 85 end
jbe@0 86
jbe@0 87 end
jbe@0 88
jbe@0 89 elseif request.method == "POST" then
jbe@0 90
jbe@10 91 if request.path == "post_example" then
jbe@0 92 local files = {}
jbe@0 93 do
jbe@0 94 local file
jbe@0 95 request:stream_post_param("files", function(chunk, field_name, meta)
jbe@0 96 if meta then
jbe@0 97 file = {
jbe@0 98 file_name = meta.file_name,
jbe@0 99 content_type = meta.content_type,
jbe@0 100 length = 0
jbe@0 101 }
jbe@0 102 end
jbe@0 103 if chunk then
jbe@0 104 file.length = file.length + #chunk
jbe@0 105 else
jbe@0 106 files[#files+1] = file
jbe@0 107 end
jbe@0 108 end)
jbe@0 109 end
jbe@0 110
jbe@0 111 request:send_status("200 OK")
jbe@0 112 request:send_header("Content-Type", "text/html; chatset=UTF-8")
jbe@0 113 request:send_data("<html>\n<head>\n")
jbe@0 114 request:send_data('<link href="example_webpage.css" rel="stylesheet" type="text/css">\n')
jbe@0 115 request:send_data("<title>Moonbridge Network Server for Lua Applications &ndash; Example Application</title>\n")
jbe@0 116 request:send_data("</head>\n<body>\n")
jbe@0 117 request:send_data("<h1>Moonbridge Network Server for Lua &ndash; Example Application</h1>\n")
jbe@0 118 request:send_data("<h2>POST request successful</h2>\n")
jbe@0 119 request:send_data('<table>\n<thead><th>File name</th><th>Content type</th><th class="numeric">Bytes received</th></thead>\n<tbody>\n')
jbe@0 120 for i, file in ipairs(files) do
jbe@0 121 request:send_data("<tr>")
jbe@0 122 request:send_data("<td>", http.encode_html(file.file_name or "(unknown)"), "</td>")
jbe@0 123 request:send_data("<td>", http.encode_html(file.content_type or "(unknown)"), "</td>")
jbe@0 124 request:send_data('<td class="numeric">', http.encode_html(tostring(file.length)), "</td>")
jbe@0 125 request:send_data("</tr>\n")
jbe@0 126 end
jbe@0 127 request:send_data("</tbody>\n</table>\n")
jbe@0 128 request:send_data("<p>Submitted comment: ", http.encode_html(request.post_params.comment), "</p>\n")
jbe@0 129 request:send_data("</body>\n</html>\n")
jbe@0 130
jbe@0 131 else
jbe@0 132 request:send_status("404 Not Found")
jbe@0 133 request:send_data("<html><head><title>404 Not Found</title></head><body><h1>404 Not Found</h1></body></html>")
jbe@0 134
jbe@0 135 end
jbe@0 136
jbe@0 137 else
jbe@13 138 request:send_text_status_response("405 Method not allowed")
jbe@0 139
jbe@0 140 end
jbe@0 141
jbe@0 142 -- returning false causes termination of current process (and re-forking)
jbe@0 143 return true
jbe@0 144 end),
jbe@0 145
jbe@0 146 -- executed on process termination
jbe@0 147 finish = function()
jbe@0 148 end
jbe@0 149 }
jbe@0 150

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