Код состояния 303 - это код перенаправления. Чтобы выполнить перенаправление, вам нужно передать опцию HTTPoison, чтобы следовать ей:
HTTPoison.get!("https://www.nature.com/articles/d41586-020-00741-x", [], follow_redirect: true)
Однако вам, скорее всего, нужно будет передать опцию :force_redirect
и Хакни, так как AFAIK это не принимает 303 в качестве действительного кода состояния перенаправления.
Итак, рабочая версия будет:
HTTPoison.get!("https://www.nature.com/articles/d41586-020-00741-x",
[],
follow_redirect: true,
hackney: [{:force_redirect, true}])
, которая будет выдавать:
%HTTPoison.Response{
body: "\n\n\n\n\n\n\n\n<!DOCTYPE html>\n<html lang=\"en\" class=\"grade-c\">\n<head>\n <meta charset=\"utf-8\">\n<link rel=\"dns-prefetch\" href=\"//ajax.googleapis.com\"/>\n<link rel=\"dns-prefetch\" href=\"//fonts.googleapis.com\"/>\n<link rel=\"dns-prefetch\" href=\"//fonts.gstatic.com\"/>\n<meta http-equiv=\"X-UA-Compatible\" content=\"IE=edge\">\n<meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0, shrink-to-fit=no\">\n\n <title>What China’s coronavirus response can teach the rest of the world</title>\n <meta name=\"description\" content=\"Researchers are studying the effects of China's lockdowns to glean insights about controlling the viral pandemic.\"/>\n <meta property=\"og:url\" content=\"https://www.nature.com/articles/d41586-020-00741-x\"/>\n <meta property=\"og:type\" content=\"article\"/>\n <meta property=\"og:title\" content=\"What China’s coronavirus response can teach the rest of the world\"/>\n <meta property=\"og:description\" content=\"Researchers are studying the effects of China's lockdowns to glean insights about controlling the viral pandemic.\"/>\n <meta property=\"og:image\"\n content=\"https://media.nature.com/lw1024/magazine-assets/d41586-020-00741-x/d41586-020-00741-x_17788864.jpg\"/>\n <meta name=\"twitter:card\" content=\"summary_large_image\"/>\n <meta name=\"twitter:site\" content=\"@nature\"/>\n <meta name=\"twitter:title\" content=\"What China’s coronavirus response can teach the rest of the world\"/>\n <meta name=\"twitter:description\" content=\"Researchers are studying the effects of China's lockdowns to glean insights about controlling the viral pandemic.\"/>\n <meta name=\"twitter:image\"\n content=\"https://media.nature.com/lw1024/magazine-assets/d41586-020-00741-x/d41586-020-00741-x_17788864.jpg\"/>\n \n\n <meta name=\"journal_id\" content=\"41586\"/>\n\n <meta name=\"dc.title\" content=\"What China’s coronavirus response can teach the rest of the world\"/>\n\n <meta name=\"dc.source\" content=\"Nature 2020\"/>\n\n <meta name=\"dc.format\" content=\"text/html\"/>\n\n <meta name=\"dc.publisher\" content=\"Nature Publishing Group\"/>\n\n <meta name=\"dc.date\" content=\"2020-03-17\"/>\n\n <meta name=\"dc.type\" content=\"News Explainer\"/>\n\n <meta name=\"dc.language\" content=\"En\"/>\n\n <meta name=\"dc.copyright\" content=\"2020 Nature\"/>\n\n <meta name=\"dc.rightsAgent\" content=\"journalpermissions@springernature.com\"/>\n\n <meta name=\"dc.description\" content=\"Researchers are studying the effects of China's lockdowns to glean insights about controlling the viral pandemic. Researchers are studying the effects of China's lockdowns to glean insights about controlling the viral pandemic.\"/>\n\n <meta name=\"prism.publicationName\" content=\"Nature\"/>\n\n <meta name=\"prism.publicationDate\" content=\"2020-03-17\"/>\n\n <meta name=\"prism.section\" content=\"News\"/>\n\n <meta name=\"prism.startingPage\" content=\"\"/>\n\n <meta name=\"prism.endingPage\" content=\"\"/>\n\n <meta name=\"prism.copyright\" content=\"2020 Nature\"/>\n\n <meta name=\"prism.rightsAgent\" content=\"journalpermissions@springernature.com\"/>\n\n <meta name=\"prism.url\" content=\"https://www.nature.com/articles/d41586-020-00741-x\"/>\n\n <meta name=\"prism.doi\" content=\"doi:10.1038/d41586-020-00741-x\"/>\n\n <meta name=\"dc.identifier\" content=\"doi:10.1038/d41586-020-00741-x\"/>\n\n <meta name=\"DOI\" content=\"10.1038/d41586-020-00741-x\"/>\n\n <meta name=\"description\" content=\"Researchers are studying the effects of China's lockdowns to glean insights about controlling the viral pandemic. Researchers are studying the effects of China's lockdowns to glean insights about controlling the viral pandemic.\"/>\n\n <meta name=\"dc.creator\" content=\"David Cyranoski\"/>\n\n <meta name=\"dc.subject\" content=\"Government\"/>\n\n <meta name=\"dc.subject\" content=\"Infection\"/>\n\n <meta name=\"dc.subject\" content=\"Public health\"/>\n\n\n\n<script>(function(e){var t=e.documentElement,n=e.implementation;t.className='js';if(n&&n.hasFeature('http://www.w3.org/TR/SVG11/feature#Image','1.1')){t.className+=' svg'}})(document)</script>\n<link rel=\"stylesheet\" href=\"/static/css/m" <> ...,
headers: [
...
],
request: %HTTPoison.Request{
body: "",
headers: [],
method: :get,
options: [follow_redirect: true, hackney: [force_redirect: true]],
params: %{},
url: "https://www.nature.com/articles/d41586-020-00741-x"
},
request_url: "https://www.nature.com/articles/d41586-020-00741-x",
status_code: 200
}