inets httpd:服务器配置文件语法(proplist_file)

Question

启动httpd服务器时，配置文件的语法如下：

inets:start(httpd, 
    [{proplist_file, "./server_config.txt"}]
).

httpd文档说：

{proplist_file路径()} 如果定义了该属性，则Inet希望找到该文件中定义的所有其他属性。

和：

这些属性将从一个配置文件中获取，该配置文件可以由一个普通的Erlang属性列表组成。

但是有了这个文件：

server_config.txt：

[
  {port, 0},
  {server_name, "httpd_test"},
  {server_root, "/Users/7stud/erlang_programs/inets_proj"},
  {document_root, "/Users/7stud/erlang_programs/inets_proj/htdocs"},
  {ipfamily, inet6},
  { bind_address, {0,0,0,0,0,0,0,1} }
]

我知道错误：

$ erl
Erlang/OTP 19 [erts-8.2] [source] [64-bit] [smp:4:4] [async-threads:10] [hipe] [kernel-poll:false]

Eshell V8.2  (abort with ^G)

1> inets:start().
ok

2> inets:start(httpd, [{proplist_file, "/Users/7stud/erlang_programs/inets_proj/server_config.txt"}]).
** exception error: no try clause matching {error,{8,erl_parse,["syntax error before: ",[]]}}
     in function  httpd_sup:httpd_config/1 (httpd_sup.erl, line 144)
     in call from httpd_sup:start_child/1 (httpd_sup.erl, line 52)
     in call from inets:call_service/3 (inets.erl, line 461)

接下来，我尝试了Apache语法，但这也不起作用：

server_config.txt：

Port 0
ServerName "httpd_test"
ServerRoot "/Users/7stud/erlang_programs/inets_proj"
DocumentRoot "./htdocs"
Ipfamily inet6
BindAddress {0,0,0,0,0,0,0,1}

3> inets:start(httpd, [{file, "./server_config.txt"}]).         
{error,"httpd_conf: \"/Users/7stud/erlang_programs/inets_proj\" is an invalid ServerRoot"}

4>

好吧，通过去掉引号，我在Apache样式语法方面取得了一些进展：

Port 0
ServerName httpd_test
ServerRoot /Users/7stud/erlang_programs/inets_proj
DocumentRoot ./htdocs
Ipfamily inet6
BindAddress 0:0:0:0:0:0:0:1

现在，我得到了错误：

8> inets:start(httpd, [{file, "./server_config.txt"}]).
{error,"httpd_conf: 0:0:0:0:0:0:0:1 is an invalid address"}

Answer 1

我算出了proplist syntax。当我开始使用proplist语法时，我缩短了路径：

server_config.txt：

[
  {port, 0},
  {server_name, "httpd_test"},
  {server_root, "."},
  {document_root, "./htdocs"},
  {ipfamily, inet6},
  { bind_address, {0,0,0,0,0,0,0,1} }
].

注意结尾处的.！语法是如此明显，难怪文档没有给出一个例子。:(

$ erl
Erlang/OTP 19 [erts-8.2] [source] [64-bit] [smp:4:4] [async-threads:10] [hipe] [kernel-poll:false]

Eshell V8.2  (abort with ^G)

1> inets:start().
ok

2> {ok, Server} =  inets:start(httpd, [{proplist_file, "./server_config.txt"}]).
{ok,<0.73.0>}

3> httpd:info(Server).
[{mime_types,[{"htm","text/html"},{"html","text/html"}]},
 {ipfamily,inet6},
 {server_name,"httpd_test"},
 {bind_address,{0,0,0,0,0,0,0,1}},
 {server_root,"."},
 {port,49400},
 {document_root,"./htdocs"}]

我仍然想知道如何用ipv6指定一个Apache syntax绑定地址。也许ipv6是在erlang语法实现之后出现的？