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jbe@215
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1 --[[--
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jbe@327
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2 success = -- false if an error occurred, true otherwise
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jbe@215
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3 request.handler(
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jbe@349
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4 http_request -- HTTP request object
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5 )
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6
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7 Called by mcp.lua to process an HTTP request. Calls request.router() and handles the request. Note: request initializers (see request.initialize()) are to be executed by mcp.lua before this function is invoked by mcp.lua.
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8
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jbe@215
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9 --]]--
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jbe@210
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10
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jbe@347
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11 function request.handler(http_request)
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jbe@212
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12 request._http_request = http_request
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jbe@215
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13 local path = http_request.path
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jbe@215
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14 if path then
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jbe@221
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15 local relative_baseurl_elements = {}
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jbe@215
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16 for match in string.gmatch(path, "/") do
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jbe@221
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17 relative_baseurl_elements[#relative_baseurl_elements+1] = "../"
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jbe@215
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18 end
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jbe@280
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19 if #relative_baseurl_elements > 0 then
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jbe@280
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20 request._relative_baseurl = table.concat(relative_baseurl_elements)
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jbe@280
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21 else
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jbe@280
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22 request._relative_baseurl = "./"
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jbe@280
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23 end
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jbe@215
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24 else
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jbe@215
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25 request._relative_baseurl = nil
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jbe@215
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26 end
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jbe@329
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27 request._route = request.router()
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jbe@275
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28 do
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jbe@275
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29 local post_id = http_request.post_params["_webmcp_id"]
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jbe@275
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30 if post_id then
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jbe@275
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31 request._route.id = post_id
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jbe@275
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32 end
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jbe@275
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33 end
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jbe@255
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34
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35 local success, error_info = xpcall(
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36 function()
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jbe@255
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37
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jbe@329
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38 if not request._route then
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jbe@329
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39 request._route = {}
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jbe@329
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40 if request.get_404_route() then
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41 request.set_status("404 Not Found")
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jbe@329
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42 request.forward(request.get_404_route())
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jbe@329
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43 else
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jbe@329
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44 error("Could not route request URL")
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jbe@329
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45 end
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jbe@329
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46 end
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jbe@329
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47
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jbe@255
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48 if request._route.static then
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jbe@358
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49 local subpath = request._route.static
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jbe@358
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50 for element in string.gmatch(subpath, "[^/]+") do
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51 if element == "." or element == ".." then
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52 subpath = nil
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53 break
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jbe@358
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54 end
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jbe@358
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55 end
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jbe@347
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56 local fstat, f, errmsg
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57 if subpath then
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58 local filename = WEBMCP_BASE_PATH .. "static/" .. subpath
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59 fstat, errmsg = extos.stat(filename)
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jbe@358
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60 if fstat then
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jbe@358
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61 if fstat.isdir then
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62 errmsg = "Is a directory"
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jbe@358
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63 elseif not fstat.isreg then
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64 errmsg = "Not a regular file"
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jbe@358
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65 else
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66 f, errmsg = io.open(filename, "r")
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67 end
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jbe@347
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68 end
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jbe@347
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69 end
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jbe@270
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70 if not f then
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71 if request.get_404_route() then
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jbe@329
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72 request.set_status("404 Not Found")
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jbe@270
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73 request.forward(request.get_404_route())
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74 else
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75 error('Could not open static file "' .. subpath .. '": ' .. errmsg)
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jbe@270
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76 end
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jbe@327
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77 else
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jbe@327
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78 local d = assert(f:read("*a"))
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79 f:close()
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80 slot.put_into("data", d)
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81 local filename_extension = string.match(subpath, "%.([^.]+)$")
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82 slot.set_layout(nil, request._mime_types[filename_extension] or "application/octet-stream")
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83 request.allow_caching()
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84 return
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jbe@270
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85 end
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jbe@255
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86 end
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jbe@255
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87
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jbe@255
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88 -- restore slots if coming from http redirect
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jbe@327
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89 do
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90 local tempstore_value = http_request.get_params["_tempstore"]
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jbe@327
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91 if tempstore_value then
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92 trace.restore_slots{}
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jbe@327
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93 local blob = tempstore.pop(tempstore_value)
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94 if blob then slot.restore_all(blob) end
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95 end
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jbe@255
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96 end
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jbe@255
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97
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98 if request.get_action() then
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99 trace.request{
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100 module = request.get_module(),
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101 action = request.get_action()
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102 }
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jbe@255
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103 if
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jbe@352
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104 not execute.action{
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105 module = request.get_module(),
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106 action = request.get_action(),
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107 test_existence = true
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jbe@358
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108 } and
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109 request.get_404_route()
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jbe@255
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110 then
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111 request.set_status("404 Not Found")
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112 request.forward(request.get_404_route())
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113 else
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jbe@255
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114 if http_request.method ~= "POST" then
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115 request.set_status("405 Method Not Allowed")
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116 request.add_header("Allow", "POST")
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117 error("Tried to invoke an action with a GET request.")
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118 end
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jbe@255
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119 local action_status = execute.filtered_action{
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120 module = request.get_module(),
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121 action = request.get_action(),
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jbe@255
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122 }
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jbe@255
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123 if not request.is_rerouted() then
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jbe@255
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124 local routing_mode, routing_module, routing_view, routing_anchor
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jbe@255
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125 routing_mode = http_request.post_params["_webmcp_routing." .. action_status .. ".mode"]
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126 routing_module = http_request.post_params["_webmcp_routing." .. action_status .. ".module"]
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127 routing_view = http_request.post_params["_webmcp_routing." .. action_status .. ".view"]
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128 routing_anchor = http_request.post_params["_webmcp_routing." .. action_status .. ".anchor"]
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jbe@255
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129 if not (routing_mode or routing_module or routing_view) then
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130 action_status = "default"
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131 routing_mode = http_request.post_params["_webmcp_routing.default.mode"]
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132 routing_module = http_request.post_params["_webmcp_routing.default.module"]
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133 routing_view = http_request.post_params["_webmcp_routing.default.view"]
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134 routing_anchor = http_request.post_params["_webmcp_routing.default.anchor"]
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jbe@255
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135 end
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jbe@255
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136 assert(routing_module, "Routing information has no module.")
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137 assert(routing_view, "Routing information has no view.")
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138 if routing_mode == "redirect" then
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139 local routing_params = {}
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140 for key, value in pairs(request.get_param_strings{ method="POST", include_internal=true }) do
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141 local status, stripped_key = string.match(
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jbe@255
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142 key, "^_webmcp_routing%.([^%.]*)%.params%.(.*)$"
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143 )
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jbe@255
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144 if status == action_status then
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145 routing_params[stripped_key] = value
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146 end
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jbe@255
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147 end
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jbe@255
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148 request.redirect{
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jbe@255
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149 module = routing_module,
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150 view = routing_view,
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jbe@255
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151 id = http_request.post_params["_webmcp_routing." .. action_status .. ".id"],
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152 params = routing_params,
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153 anchor = routing_anchor
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jbe@255
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154 }
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jbe@255
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155 elseif routing_mode == "forward" then
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156 request.forward{ module = routing_module, view = routing_view }
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jbe@255
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157 else
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158 error("Missing or unknown routing mode in request parameters.")
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159 end
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jbe@255
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160 end
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161 end
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jbe@255
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162 else
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jbe@255
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163 -- no action
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jbe@255
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164 trace.request{
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165 module = request.get_module(),
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166 view = request.get_view()
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167 }
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jbe@255
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168 if
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jbe@352
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169 not execute.view{
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170 module = request.get_module(),
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171 view = request.get_view(),
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172 test_existence = true
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173 } and request.get_404_route()
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jbe@255
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174 then
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175 request.set_status("404 Not Found")
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176 request.forward(request.get_404_route())
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177 end
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jbe@255
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178 end
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jbe@255
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179
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jbe@255
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180 if not request.get_redirect_data() then
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jbe@255
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181 request.process_forward()
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jbe@255
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182 local view = request.get_view()
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jbe@255
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183 if string.find(view, "^_") then
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jbe@255
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184 error("Tried to call a private view (prefixed with underscore).")
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185 end
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jbe@255
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186 execute.filtered_view{
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187 module = request.get_module(),
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188 view = view,
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189 }
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jbe@255
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190 end
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jbe@255
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191
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jbe@255
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192 end,
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jbe@255
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193
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jbe@255
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194 function(errobj)
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jbe@255
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195 return {
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jbe@255
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196 errobj = errobj,
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jbe@255
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197 stacktrace = string.gsub(
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jbe@255
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198 debug.traceback('', 2),
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199 "^\r?\n?stack traceback:\r?\n?", ""
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200 )
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jbe@255
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201 }
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jbe@255
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202 end
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jbe@255
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203 )
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jbe@255
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204
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jbe@255
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205 if not success then trace.error{} end
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jbe@255
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206
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jbe@255
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207 slot.select('trace', trace.render) -- render trace information
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jbe@255
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208
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jbe@255
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209 local redirect_data = request.get_redirect_data()
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jbe@255
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210
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jbe@255
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211 -- log error and switch to error layout, unless success
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jbe@255
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212 if not success then
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jbe@255
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213 local errobj = error_info.errobj
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jbe@255
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214 local stacktrace = error_info.stacktrace
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jbe@255
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215 if not request._status then
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jbe@255
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216 request._status = "500 Internal Server Error"
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jbe@255
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217 end
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jbe@328
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218 http_request:close_after_finish()
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jbe@255
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219 slot.set_layout('system_error')
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jbe@255
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220 slot.select('system_error', function()
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jbe@255
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221 if getmetatable(errobj) == mondelefant.errorobject_metatable then
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jbe@255
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222 slot.put(
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jbe@255
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223 "<p>Database error of class <b>",
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jbe@255
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224 encode.html(errobj.code),
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jbe@255
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225 "</b> occured:<br/><b>",
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jbe@255
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226 encode.html(errobj.message),
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jbe@255
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227 "</b></p>"
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jbe@255
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228 )
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jbe@255
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229 else
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jbe@255
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230 slot.put("<p><b>", encode.html(tostring(errobj)), "</b></p>")
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jbe@255
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231 end
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jbe@255
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232 slot.put("<p>Stack trace follows:<br/>")
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jbe@255
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233 slot.put(encode.html_newlines(encode.html(stacktrace)))
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jbe@255
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234 slot.put("</p>")
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jbe@255
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235 end)
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jbe@255
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236 elseif redirect_data then
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jbe@267
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237 redirect_data = table.new(redirect_data)
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jbe@267
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238 redirect_data.params = table.new(redirect_data.params)
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jbe@255
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239 local slot_dump = slot.dump_all()
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jbe@255
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240 if slot_dump ~= "" then
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jbe@312
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241 redirect_data.params._tempstore = tempstore.save(slot_dump)
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jbe@255
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242 end
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jbe@255
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243 http_request:send_status("303 See Other")
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jbe@264
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244 for i, header in ipairs(request._response_headers) do
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jbe@264
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245 http_request:send_header(header[1], header[2])
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jbe@264
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246 end
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jbe@267
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247 http_request:send_header("Location", encode.url(redirect_data))
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jbe@255
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248 http_request:finish()
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jbe@255
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249 end
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jbe@255
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250
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jbe@255
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251 if not success or not redirect_data then
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jbe@255
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252
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jbe@255
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253 http_request:send_status(request._status or "200 OK")
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jbe@255
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254 for i, header in ipairs(request._response_headers) do
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jbe@255
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255 http_request:send_header(header[1], header[2])
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jbe@255
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256 end
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jbe@291
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257 if not request._cache_manual then
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jbe@291
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258 local cache_time = request._cache_time
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jbe@291
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259 if request._cache and cache_time and cache_time > 0 then
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jbe@291
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260 http_request:send_header("Cache-Control", "max-age=" .. cache_time)
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jbe@291
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261 else
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jbe@291
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262 http_request:send_header("Cache-Control", "no-cache")
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jbe@291
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263 end
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jbe@291
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264 end
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jbe@255
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265 http_request:send_header("Content-Type", slot.get_content_type())
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jbe@255
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266 http_request:send_data(slot.render_layout())
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jbe@255
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267 http_request:finish()
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jbe@255
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268 end
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jbe@255
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269
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jbe@327
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270 return success
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jbe@327
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271
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jbe@215
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272 end
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