{"id":55407,"date":"2020-01-20T00:00:00","date_gmt":"2020-01-19T21:00:00","guid":{"rendered":"https:\/\/prohoster.info\/blog\/blog_prohoster\/nginx-kak-pobedit-response_status-0"},"modified":"2020-02-18T14:03:31","modified_gmt":"2020-02-18T11:03:31","slug":"nginx-kak-pobedit-response_status-0","status":"publish","type":"post","link":"https:\/\/prohoster.info\/fr\/blog\/administrirovanie\/nginx-kak-pobedit-response_status-0","title":{"rendered":"[Nginx] \u041a\u0430\u043a \u043f\u043e\u0431\u0435\u0434\u0438\u0442\u044c response_status = 0","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Article du genre \u00ab notes en marge \u00bb.<\/p>\n

TL:DR :<\/b><\/p>\n

http2_max_field_size 8k; # tout le monde sera sauv\u00e9 !<\/code><\/pre>\n
Dans l'un de mes projets, apr\u00e8s modification de la logique interne du backend, j'ai commenc\u00e9 \u00e0 observer un code de r\u00e9ponse \u00e9trange dans les logs, \u00e0 savoir \u2014 0. Dans les logs, cela ressemble \u00e0 peu pr\u00e8s \u00e0 ceci :<\/p>\n
{\n  \"timestamp\": \"2020-01-17T08:41:51+00:00\",\n  \"remote_addr\": \"zzz.zzz.zzz.zzz\",\n  \"request_time\": 0,\n  \"upstream_response_time\": \"\",\n  \"upstream_header_time\": \"\",\n  \"http_accept_language\": \"-language\",\n  \"response_status\": 0,\n  \"request\": \"\",\n  \"host\": \"example.com\",\n  \"upstream_addr\": \"\",\n  \"http_referrer\": \"\",\n  \"request_length\": 5854,\n  \"bytes_sent\": 0,\n  \"http_user_agent\": \"\"\n}\n<\/code><\/pre>\n
<\/a><\/noindex>
\nLire la documentation et googler sur ce sujet n\u2019a rien donn\u00e9 \u2014 car il est affirm\u00e9 que ce comportement survient lorsque le client ferme la connexion sans transmettre les en-t\u00eates. Et il y a une certaine excentricit\u00e9 concernant la taille du buffer pour wsgi_, qui dans notre cas ne convenait absolument pas.<\/p>\n
En gros, nous avons d\u00e9cid\u00e9 que le probl\u00e8me n'\u00e9tait pas un probl\u00e8me, \u00e9tant donn\u00e9 que dans nos volumes, cela n'est absolument pas critique.<\/p>\n
Jusqu'\u00e0 ce que je sois confront\u00e9 \u00e0 un autre probl\u00e8me : dans certains cas, les liens s'ouvrent sans probl\u00e8me en http, mais refusent compl\u00e8tement de fonctionner en https, affichant la merveilleuse : Connection #0 to host example.com left intact.
\ncurl: (52) R\u00e9ponse vide du serveur<\/p>\n
Dans les logs, cette anomalie n'a pu \u00eatre suivie que par IP \u2014 ni la requ\u00eate, ni d'autres donn\u00e9es, comme le montre l'exemple ci-dessus \u2014 n'\u00e9taient pr\u00e9sentes. Juste le fameux statut 0, mais je sais que je n'ai pas interrompu la requ\u00eate ! J'ai commenc\u00e9 \u00e0 gratter pour voir ce qui pouvait mal tourner. Et tout s\u2019est av\u00e9r\u00e9 tr\u00e8s simple :<\/p>\n
listen 443 ssl<\/a> http2<\/b> backlog=8192;<\/i><\/p>\n
Donc, si vous utilisez http2 pour les connexions ssl, il ne suffit pas de configurer simplement les buffers de requ\u00eate, il faut aussi les configurer dans ngx_http_v2_module, \u00e0 savoir :<\/p>\n
Syntaxe :\thttp2_max_field_size taille;\nValeur par d\u00e9faut :\thttp2_max_field_size 4k;\nContexte :\thttp, server\n<\/code><\/pre>\n
\nLimite la taille maximale des en-t\u00eates de requ\u00eate, compress\u00e9e \u00e0 l'aide de HPACK. La limite s'applique \u00e9galement bien au nom qu'\u00e0 la valeur. Si le codage de Huffman est utilis\u00e9, la taille r\u00e9elle des cha\u00eenes de nom et de valeur d\u00e9compress\u00e9es peut \u00eatre sup\u00e9rieure. La limite par d\u00e9faut convient \u00e0 la plupart des requ\u00eates.<\/i><\/p>\n
En gros, c'est \u00e7a. Et pourquoi donc ? Parce que la longueur du lien \u00e9tait grande \u2014 plus que ces 4k.<\/p>\n
En le r\u00e9glant, par exemple, \u00e0 8kb (ou autant que n\u00e9cessaire) \u2014 nous r\u00e9solvons le probl\u00e8me.
\nVoil\u00e0 donc.
\n
Source : habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"
\u0421\u0442\u0430\u0442\u044c\u044f \u0438\u0437 \u0440\u0430\u0437\u0440\u044f\u0434\u0430 \u00ab\u0437\u0430\u043c\u0435\u0442\u043a\u0438 \u043d\u0430 \u043f\u043e\u043b\u044f\u0445\u00bb. TL:DR: http2_max_field_size 8k; # \u0432\u0441\u0435\u0445 \u0441\u043f\u0430\u0441\u0435\u0442! \u041d\u0430 \u043e\u0434\u043d\u043e\u043c \u0438\u0437 \u043f\u0440\u043e\u0435\u043a\u0442\u043e\u0432, \u043f\u043e\u0441\u043b\u0435 \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u044f \u043d\u0435\u043a\u043e\u0442\u043e\u0440\u043e\u0439 \u0432\u043d\u0443\u0442\u0440\u0435\u043d\u043d\u0435\u0439 \u043b\u043e\u0433\u0438\u043a\u0438 \u0431\u0435\u043a\u0435\u043d\u0434\u0430, \u043d\u0430\u0447\u0430\u043b \u043d\u0430\u0431\u043b\u044e\u0434\u0430\u0442\u044c \u0441\u0442\u0440\u0430\u043d\u043d\u044b\u0439 response_code \u0432 \u043b\u043e\u0433\u0430\u0445, \u0430 \u0438\u043c\u0435\u043d\u043d\u043e \u2014 0. \u0412 \u043b\u043e\u0433\u0430\u0445 \u0432\u044b\u0433\u043b\u044f\u0434\u0438\u0442 \u043f\u0440\u0438\u043c\u0435\u0440\u043d\u043e \u0442\u0430\u043a: { "timestamp": "2020-01-17T08:41:51+00:00", "remote_addr": "zzz.zzz.zzz.zzz", "request_time": 0, "upstream_response_time": "", "upstream_header_time": "", "http_accept_language": "-language", "response_status": 0, "request": "", "host": […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-55407","post","type-post","status-publish","format-standard","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47[Nginx] \u041a\u0430\u043a \u043f\u043e\u0431\u0435\u0434\u0438\u0442\u044c response_status = 0 | ProHoster","description":"Article du type \u00ab notes en marge \u00bb. TL:DR : http2_max_field_size 8k ; # tout le monde sera sauv\u00e9 ! Dans l'un des projets, apr\u00e8s avoir apport\u00e9 certaines modifications.","canonical_url":"https:\/\/prohoster.info\/fr\/blog\/administrirovanie\/nginx-kak-pobedit-response_status-0","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"fr_FR","og:site_name":"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b","og:type":"article","og:title":"\ud83e\udd47[Nginx] \u041a\u0430\u043a \u043f\u043e\u0431\u0435\u0434\u0438\u0442\u044c response_status = 0 | ProHoster","og:description":"\u0421\u0442\u0430\u0442\u044c\u044f \u0438\u0437 \u0440\u0430\u0437\u0440\u044f\u0434\u0430 \u00ab\u0437\u0430\u043c\u0435\u0442\u043a\u0438 \u043d\u0430 \u043f\u043e\u043b\u044f\u0445\u00bb. TL:DR:http2_max_field_size 8k; # \u0432\u0441\u0435\u0445 \u0441\u043f\u0430\u0441\u0435\u0442! \u041d\u0430 \u043e\u0434\u043d\u043e\u043c \u0438\u0437 \u043f\u0440\u043e\u0435\u043a\u0442\u043e\u0432, \u043f\u043e\u0441\u043b\u0435 \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u044f \u043d\u0435\u043a\u043e\u0442\u043e\u0440\u043e\u0439.","og:url":"https:\/\/prohoster.info\/fr\/blog\/administrirovanie\/nginx-kak-pobedit-response_status-0","og:image":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:secure_url":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:width":350,"og:image:height":350,"article:published_time":"2020-01-19T21:00:00+00:00","article:modified_time":"2020-02-18T11:03:31+00:00","article:publisher":"https:\/\/www.facebook.com\/prohoster","article:author":"https:\/\/www.facebook.com\/prohoster"},"aioseo_meta_data":{"post_id":"55407","title":null,"description":null,"keywords":null,"keyphrases":null,"primary_term":null,"canonical_url":null,"og_title":null,"og_description":null,"og_object_type":"default","og_image_type":"default","og_image_url":null,"og_image_width":null,"og_image_height":null,"og_image_custom_url":null,"og_image_custom_fields":null,"og_video":null,"og_custom_url":null,"og_article_section":null,"og_article_tags":null,"twitter_use_og":false,"twitter_card":"default","twitter_image_type":"default","twitter_image_url":null,"twitter_image_custom_url":null,"twitter_image_custom_fields":null,"twitter_title":null,"twitter_description":null,"schema":{"blockGraphs":[],"customGraphs":[],"default":{"data":{"Article":[],"Course":[],"Dataset":[],"FAQPage":[],"Movie":[],"Person":[],"Product":[],"ProductReview":[],"Car":[],"Recipe":[],"Service":[],"SoftwareApplication":[],"WebPage":[]},"graphName":"","isEnabled":true},"graphs":[]},"schema_type":null,"schema_type_options":null,"pillar_content":false,"robots_default":true,"robots_noindex":false,"robots_noarchive":false,"robots_nosnippet":false,"robots_nofollow":false,"robots_noimageindex":false,"robots_noodp":false,"robots_notranslate":false,"robots_max_snippet":null,"robots_max_videopreview":null,"robots_max_imagepreview":"large","priority":null,"frequency":null,"local_seo":null,"seo_analyzer_scan_date":null,"breadcrumb_settings":null,"limit_modified_date":false,"reviewed_by":null,"ai":null,"created":"2021-02-28 19:44:26","updated":"2026-02-09 17:28:53","focus_keyword":null,"additional_keywords":null,"truseo_locale":null},"gt_translate_keys":[{"key":"link","format":"url"}],"_links":{"self":[{"href":"https:\/\/prohoster.info\/fr\/wp-json\/wp\/v2\/posts\/55407","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/fr\/wp-json\/wp\/v2\/comments?post=55407"}],"version-history":[{"count":1,"href":"https:\/\/prohoster.info\/fr\/wp-json\/wp\/v2\/posts\/55407\/revisions"}],"predecessor-version":[{"id":159518,"href":"https:\/\/prohoster.info\/fr\/wp-json\/wp\/v2\/posts\/55407\/revisions\/159518"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/fr\/wp-json\/wp\/v2\/media?parent=55407"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/fr\/wp-json\/wp\/v2\/categories?post=55407"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/fr\/wp-json\/wp\/v2\/tags?post=55407"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}