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roles: introduce role for http servers
This patch adds `roles.httpd`. This role allows to configure one or more HTTP servers. Those servers could be reused by several other roles. Servers could be accessed by their names (from the config). `get_server(name)` method returns a server by its name. If `nil` is passed, default server is returned. The server is default, if it has `DEFAULT_SERVER_NAME` (`"default"`) as a name. Closes #196
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,2 @@ | ||
| # Install. | ||
| install(FILES httpd.lua DESTINATION ${TARANTOOL_INSTALL_LUADIR}/roles) |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,133 @@ | ||
| local checks = require('checks') | ||
| local urilib = require('uri') | ||
| local http_server = require('http.server') | ||
|
|
||
| local M = { | ||
| DEFAULT_SERVER_NAME = 'default', | ||
| } | ||
| local servers = {} | ||
|
|
||
| local function parse_listen(listen) | ||
| if listen == nil then | ||
| return nil, nil, "must exist" | ||
| end | ||
| if type(listen) ~= "string" and type(listen) ~= "number" then | ||
| return nil, nil, "must be a string or a number, got " .. type(listen) | ||
| end | ||
|
|
||
| local host | ||
| local port | ||
| if type(listen) == "string" then | ||
| local uri, err = urilib.parse(listen) | ||
| if err ~= nil then | ||
| return nil, nil, "failed to parse URI: " .. err | ||
| end | ||
|
|
||
| if uri.scheme ~= nil then | ||
| if uri.scheme == "unix" then | ||
| uri.unix = uri.path | ||
| else | ||
| return nil, nil, "URI scheme is not supported" | ||
| end | ||
| end | ||
|
|
||
| if uri.login ~= nil or uri.password then | ||
| return nil, nil, "URI login and password are not supported" | ||
| end | ||
|
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||
| if uri.query ~= nil then | ||
| return nil, nil, "URI query component is not supported" | ||
| end | ||
|
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| if uri.unix ~= nil then | ||
| host = "unix/" | ||
| port = uri.unix | ||
| else | ||
| if uri.service == nil then | ||
| return nil, nil, "URI must contain a port" | ||
| end | ||
|
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||
| port = tonumber(uri.service) | ||
| if port == nil then | ||
| return nil, nil, "URI port must be a number" | ||
| end | ||
| if uri.host ~= nil then | ||
| host = uri.host | ||
| elseif uri.ipv4 ~= nil then | ||
| host = uri.ipv4 | ||
| elseif uri.ipv6 ~= nil then | ||
| host = uri.ipv6 | ||
| else | ||
| host = "0.0.0.0" | ||
| end | ||
| end | ||
| elseif type(listen) == "number" then | ||
| host = "0.0.0.0" | ||
| port = listen | ||
| end | ||
|
|
||
| if type(port) == "number" and (port < 1 or port > 65535) then | ||
| return nil, nil, "port must be in the range [1, 65535]" | ||
| end | ||
| return host, port, nil | ||
| end | ||
|
|
||
| local function apply_http(name, node) | ||
| local host, port, err = parse_listen(node.listen) | ||
| if err ~= nil then | ||
| error("failed to parse URI: " .. err) | ||
| end | ||
|
|
||
| if servers[name] == nil then | ||
| local httpd = http_server.new(host, port) | ||
| httpd:start() | ||
| servers[name] = { | ||
| httpd = httpd, | ||
| routes = {}, | ||
| } | ||
| end | ||
| end | ||
|
|
||
| M.validate = function(conf) | ||
| if conf ~= nil and type(conf) ~= "table" then | ||
| error("configuration must be a table, got " .. type(conf)) | ||
| end | ||
| conf = conf or {} | ||
|
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||
| for name, node in pairs(conf) do | ||
| if type(name) ~= 'string' then | ||
| error("name of the server must be a string") | ||
| end | ||
|
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||
| local _, _, err = parse_listen(node.listen) | ||
| if err ~= nil then | ||
| error("failed to parse http 'listen' param: " .. err) | ||
| end | ||
| end | ||
| end | ||
|
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||
| M.apply = function(conf) | ||
| -- This should be called on the role's lifecycle, but it's better to give | ||
| -- a meaningful error if something goes wrong. | ||
| M.validate(conf) | ||
|
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||
| for name, node in pairs(conf or {}) do | ||
| apply_http(name, node) | ||
| end | ||
| end | ||
|
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| M.stop = function() | ||
| for _, server in pairs(servers) do | ||
| server.httpd:stop() | ||
| end | ||
| servers = {} | ||
| end | ||
|
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||
| M.get_server = function(name) | ||
| checks('?string') | ||
|
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| name = name or M.DEFAULT_SERVER_NAME | ||
| return (servers[name] or {}).httpd | ||
| end | ||
|
|
||
| return M |
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