inets httpc：用户指南中的客户端示例不起作用

Question

我从 inets User's Guide 复制了以下代码：

$ 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> httpc:set_options([{proxy, {{"www-proxy.mycompany.com", 8000}, ["localhost"]}}]).
ok

3> {ok, {{Version, 200, ReasonPhrase}, Headers, Body}} = httpc:request("http://www.erlang.org").
* exception error: no match of right hand side value 
                {error,
                    {failed_connect,
                        [{to_address,{"www-proxy.mycompany.com",8000}},
                         {inet,[inet],etimedout}]}}

我需要有关如何成功完成该请求的建议。

Answer 1

这似乎有效：

$ 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, {{Version, 200, ReasonPhrase}, Headers, Body}} = httpc:request("http://www.erlang.org").
{ok,{{"HTTP/1.1",200,"OK"},
     [{"connection","keep-alive"},
      {"date","Sun, 25 Feb 2018 13:44:59 GMT"},
      {"server","nginx"},
      {"vary","Accept-Encoding"},
      {"content-length","12816"},
      {"content-type","text/html; charset=UTF-8"}],
     "<!DOCTYPE html>\n<html>\n  <head>\n    <title>Erlang Programming Language</title>\n    <meta http-equiv=\"Content-Type\" content=\"text/html;charset=utf-8\"/>\n    <meta name=\"description\" content=\"Erlang Programming Language\"/>\n    <meta name=\"keywords\" content=\"erlang, functional, programming, fault-tolerant, distributed, multi-platform, portable, software, multi-core, smp, concurrency\"/>\n

用户指南说：

The following calls use the default client profile. Use the proxy "www-proxy.mycompany.com:8000", except from requests to localhost. This applies to all the following requests.

这对我来说很有意义：

Maecenas in tincidunt diam. Pellentesque in orci sed dolor vulputate tincidunt. Etiam malesuada finibus nisi. Lorem ipsum dolor sit amet, consectetur adipiscing elit.

要停止客户端，我只是这样做：

  inets:stop()

?

编辑：我一定已经知道如何停止服务器了，因为我在这段代码中做到了：

inets httpc：用户指南中的客户端示例不起作用

inets httpc: client example in User's Guide not working

erlang

inets