{"id":92107,"date":"2020-08-23T07:42:16","date_gmt":"2020-08-23T05:42:16","guid":{"rendered":"https:\/\/prohoster.info\/blog\/administrirovanie\/etyud-po-realizaczii-row-level-secutity-v-postgresql"},"modified":"2020-08-23T07:42:16","modified_gmt":"2020-08-23T05:42:16","slug":"etyud-po-realizaczii-row-level-secutity-v-postgresql","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/administrirovanie\/etyud-po-realizaczii-row-level-secutity-v-postgresql","title":{"rendered":"Et\u00fc\u00fcd PostgreSQL-i ridade taseme turvameetmete rakendamisest","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

T\u00e4ienduseks Et\u00fc\u00fcd \u00e4riloogika rakendamisest PostgreSQL-i salvestatud protseduuride tasandil<\/a><\/noindex> ja peamiselt p\u00f5hjaliku vastuse jaoks<\/b> . Tundub, et kommentaar<\/a><\/noindex>.<\/p>\n

Teoreetiline osa on dokumentatsioonis suurep\u00e4raselt kirjeldatud Postgres Pro<\/a><\/noindex> \u2014 Ridade kaitse poliitikad<\/a><\/noindex>. Allpool k\u00e4sitletakse v\u00e4ikese konkreetse \u00e4riprobleemi \u2014 kustutatud andmete peitmine.<\/b> Et\u00fc\u00fcd on p\u00fchendatud rakendamisele Rollimudel koos RLS-iga<\/a><\/noindex><\/b> on esitatud eraldi.<\/p>\n

\"Et\u00fc\u00fcd<\/p>\n

Artiklis ei ole midagi uut, pole peidetud t\u00e4hendust ega saladusi. Lihtsalt visand teoreetilise idee praktilisest rakendamisest. Kui see huvitab, lugege. Kui ei, siis \u00e4rge raisake oma aega.<\/p><\/blockquote>\n

<\/a><\/noindex><\/p>\n

\u00dclesande seadmine<\/h3>\n

\nMitte s\u00fcvenedes s\u00fcgavale teemasse, on \u00fclesanne l\u00fchidalt j\u00e4rgmine: on tabel, mis rakendab mingit \u00e4ri\u00fcksust. Tabelist saavad read kustutatud, kuid f\u00fc\u00fcsiliselt ei tohi ridu kustutada, neid tuleb peita. <\/p>\n

Nagu \u00f6eldud \u2014 '\u00c4ra kustuta midagi, lihtsalt nimetage \u00fcmber. Internet hoiab K\u00d5IKE' <\/b><\/p>\n

<\/i> Samas on soovitav mitte kirjutada \u00fcmber juba olemasolevaid salvestatud funktsioone, mis t\u00f6\u00f6tavad selle \u00fcksusega.<\/p>\n

Selle kontseptsiooni rakendamiseks on tabelil atribuut is_deleted<\/i>. Edasi on k\u00f5ik lihtne \u2014 tuleb teha nii, et klient n\u00e4eb ainult ridu, kus atribuut is_deleted<\/i> on vale. Selleks kasutatakse Ridade taseme turvalisust.<\/b><\/p>\n

Rakendamine<\/h3>\n

\nLoome eraldi rolli ja skeemi<\/p>\n

LOODE ROLLI repos;\nLOODE SKEEM repos;<\/code><\/pre>\n
\nLoome sihtotstarbelise tabeli<\/p>\n
LOODE TABEL repos.file\n(\n...\nis_del BOOLEAN DEFAULT FALSE\n);\nLOODE SKEEM repos<\/code><\/pre>\n
\nL\u00fclitame sisse Rea taseme turvalisuse<\/i><\/p>\n
MUUDA TABEL repos.file  LUBA REA TASEME TURVALISUS ;\nLOODE POLIITIKA file_invisible_deleted  ON repos.file K\u00d5IK DBA_ROLLILE KASUTAMINE (MITTE is_deleted );\nANNE K\u00d5IK TABELILE repos.file dba_rollile ;\nANNE KASUTUS SKEEMILE repos dba_rollile ;<\/code><\/pre>\n
\nTeenindusfunktsioon<\/b> \u2014 rida kustutamine tabelis<\/p>\n
LOODE V\u00d5I ASENDA repo.delete( curr_id repos.file.id%T\u00dc\u00dcP)\nNAJAL integer KUI $$\nALUSTAGE\n...\nUUENDAGE repos.file\nSEADKE is_del = T\u00d5ENE \nKUS id = curr_id ; \n...\nL\u00d5PP\n$$ KEEL plpgsql TURVALINE DEFINIATOR;<\/code><\/pre>\n
\n\u00c4rifunktsioon<\/b> \u2014 dokumentide kustutamine<\/p>\n
LOODE V\u00d5I ASENDA business_functions.deleteDoc( doc_for_delete JSON )\nNAJAL JSON KUI $$\nALUSTAGE\n...\nSOORITUSTA repos.delete( doc_id ) ;\n...\nL\u00d5PP\n$$ KEEL plpgsql TURVALINE DEFINIATOR;<\/code><\/pre>\n
<\/p>\n
tulemused n\u00e4itasid ainult nelja ebaolulise koodibloki kattuvust, mis olid tingitud POSIX ja ANSI C n\u00f5uetest.<\/h3>\n
\nKlient kustutab dokumendi<\/p>\n
VALI business_functions.delCFile( (VALI json_build_object( 'CId', 3 )) );<\/code><\/pre>\n
\nP\u00e4rast kustutamist ei n\u00e4e dokumendi klient<\/p>\n
SELECT business_functions.getCFile( (SELECT json_build_object( 'CId', 3 )) ) ;\n-----------------\n(0 rows)<\/code><\/pre>\n
\nKuid andmebaasis ei ole dokument kustutatud, vaid ainult atribuudi is_del<\/i><\/p>\n
psql -d my_db\nVALI  id, name , is_del FROM repos.file ;\nid |  name  | is_del\n--+---------+------------\n 1 |  test_1 | t\n(1 rida)<\/code><\/pre>\n
\nJust seda n\u00f5uti \u00fclesande m\u00e4\u00e4ramisel. <\/p>\n
Kokkuv\u00f5te<\/h2>\n
\nKui teema tundub huvitav, siis j\u00e4rgmises et\u00fc\u00fcdis saab n\u00e4idata n\u00e4idet rollimudeli rakendamisest andmete juurdep\u00e4\u00e4su jagamiseks, kasutades Row Level Security't.
\n
Allikas: habr.com<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"
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