{"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\/et\/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":"

Artikkel, mille v\u00f5iks klassifitseerida kui \u201em\u00e4rkmed lehtede serval\u201c.<\/p>\n

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

http2_max_field_size 8k; # k\u00f5ik p\u00e4\u00e4stab!<\/code><\/pre>\n
\u00dcks meie projektidest, p\u00e4rast teatud sisemise logika muutmist backend'is, hakkas n\u00e4itama kummalist response_code'i logides, nimelt \u2014 0. Logides n\u00e4eb see v\u00e4lja umbes nii:<\/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>
\nDokumentatsiooni lugemine ja selle teema guugeldamine ei andnud absoluutselt midagi \u2014 kuna v\u00e4idetakse, et selline k\u00e4itumine tekib, kui klient sulgeb \u00fchenduse, edastamata p\u00e4iseid. No ja erinev eksootika wsgi_ pufferi suurusega, mis meie puhul ei sobinud \u00fcldse.<\/p>\n
Kokkuv\u00f5ttes otsustasime, et probleem \u2014 ei ole probleem, arvestades, et meie mahu korral ei ole see sugugi kriitiline.<\/p>\n
T\u00e4pselt kuni hetkeni, mil mind h\u00e4iris j\u00e4rgmine probleem: m\u00f5nel juhul avanevad lingid probleemideta http kaudu, kuid keeldusid t\u00e4ielikult t\u00f6\u00f6tamast https kaudu, andes imelise: Connection #0 to host example.com left intact
\ncurl: (52) T\u00fchi vastus serverilt<\/p>\n
Logidest on seda asja j\u00e4lgida saanud ainult IP kaudu \u2014 ei ole n\u00e4htavust ei p\u00e4ringutest ega teistest andmetest, nagu n\u00e4ide \u00fclal n\u00e4itab. Ainult see kurikuulus staatus 0, aga ma ju tean, et ma p\u00e4ringut ei katkestanud! Hakkasin uurima, mis v\u00f5ib valesti minna. Ja k\u00f5ik osutus v\u00e4ga lihtsaks:<\/p>\n
listen 443 ssl<\/a> http2<\/b> backlog=8192;<\/i><\/p>\n
Nii et kui kasutada http2 ssl-\u00fchenduste jaoks, ei piisa lihtsalt p\u00e4ringupuhvrite konfigureerimisest, neid tuleb konfigureerida ka ngx_http_v2_module'is, nimelt:<\/p>\n
S\u00fcntaks:\thttp2_max_field_size suurus;\nVaikimisi:\thttp2_max_field_size 4k;\nKontekst:\thttp, server\n<\/code><\/pre>\n
\nPiirab maksimaalset p\u00e4ringu p\u00e4ise suurust, mis on kokku surutud HPACK-i abil. Piirang kehtib v\u00f5rdselt nii nime kui ka v\u00e4\u00e4rtuse kohta. Kui kasutatakse Huffmani kodeerimist, v\u00f5ib nimede ja v\u00e4\u00e4rtuste dekomprimeeritud stringide tegelik suurus olla suurem. Vaikimisi piirang sobib enamikule p\u00e4ringutele.<\/i><\/p>\n
Kokkuv\u00f5tteks, see ongi p\u00f5hjus. Ja k\u00f5ik sellep\u00e4rast, et lingi pikkus oli suur \u2014 rohkem kui need 4k.<\/p>\n
Seades selle n\u00e4iteks 8 kb (v\u00f5i nii palju, kui t\u00f5en\u00e4oliselt piisab) \u2014 lahendame probleemi.
\nSellised lood.
\n
Allikas: habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"
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