[英]yaws crashes with httpc:request for URL served by docker container
I use yaws
and adminer
in my docker stack.我在我的
adminer
堆栈中使用yaws
和adminer
。 Formerly, I used to route https://mydomain.tld/adm?foo=bar
with nginx
to the proper container via以前,我曾经通过
nginx
将https://mydomain.tld/adm?foo=bar
路由到适当的容器
location /adm/ {
proxy_pass http://adm:8080;
}
How to do that in yaws
?如何在
yaws
做到这一点?
The idea is to get the result from the container adm
directly.这个想法是直接从容器
adm
获取结果。 Entering the yaws
container and issuing curl -v 'http://adm:8080'
works as expected.进入
yaws
容器并发出curl -v 'http://adm:8080'
按预期工作。
My Erlang code is straightforward, but I get an error I cannot make sense of.我的 Erlang 代码很简单,但出现了一个我无法理解的错误。 I start with parsing the URL for
adm
and if true translate the URL from https://mydomain.tld/adm?foo=bar
to http://adm:8080?foo=bar
and then call out_adm
我首先解析
adm
的 URL,如果为 true,则将 URL 从https://mydomain.tld/adm?foo=bar
为http://adm:8080?foo=bar
,然后调用out_adm
out_adm(Url, A) ->
inets:start(),
Http_result = httpc:request(Url),
case Http_result of
{ok, {{_Version, 200, _ReasonPhrase}, _Headers, Html}} ->
?trace('out_check_adm(A)======PASS_THROUGH HTML====> Url', [Url]),
Html;
_ ->
not_200
end.
With the help of trace I know that Http_result
is ok with Status
200.在跟踪的帮助下,我知道
Http_result
与Status
200 一致。
Mod:myurl line:863 'out_adm(A)=====PASS_THROUGH HTML====> Url' ["http://adm:8080"]
=ERROR REPORT==== 11-Oct-2021::17:55:28.784448 ===
yaws code at appmod:0 crashed or ret bad val:60
Req: {http_request,'GET',{abs_path,"/adm"},{1,1}}
I'm left with no clue.我一无所知。 To me all is clear and easy, hence the error comes as a surprise.
对我来说,一切都很简单明了,因此错误出人意料。 What is the problem?
问题是什么? How can I understand the error message?
我如何理解错误信息? Is something wrong with
Html
? Html
有什么问题吗? If so, what?如果是这样,是什么?
Looking at the definition inhttps://github.com/erlyaws/yaws/blob/master/src/yaws_server.erl did not help me:查看https://github.com/erlyaws/yaws/blob/master/src/yaws_server.erl中的定义对我没有帮助:
handle_out_reply(Reply, LineNo, YawsFile, _UT, ARG) ->
L = ?F("yaws code at ~s:~p crashed or "
"ret bad val:~p ~nReq: ~p",
[YawsFile, LineNo, Reply, ARG#arg.req]),
handle_crash(ARG, L).
How can I debug this?我该如何调试? Is this a problem of
docker
or yaws
?这是
docker
还是yaws
的问题?
Found my error:发现我的错误:
Instead of a simple Html;
而不是一个简单的
Html;
in my out_adm
function it has to be {html, Html};
在我的
out_adm
函数中,它必须是{html, Html};
But now I face another problem: See HTML is not applying the CSS when viewed in browser但现在我面临另一个问题: 在浏览器中查看时,请参阅HTML 未应用 CSS
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