{"id":527,"date":"2026-03-26T12:43:20","date_gmt":"2026-03-26T12:43:20","guid":{"rendered":"https:\/\/www.visualize-ai.com\/vi\/data-flow-diagrams-api-documentation\/"},"modified":"2026-03-26T12:43:20","modified_gmt":"2026-03-26T12:43:20","slug":"data-flow-diagrams-api-documentation","status":"publish","type":"post","link":"https:\/\/www.visualize-ai.com\/vi\/data-flow-diagrams-api-documentation\/","title":{"rendered":"S\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u cho t\u00e0i li\u1ec7u API"},"content":{"rendered":"
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\"Hand-drawn<\/figure>\n<\/div>\n

X\u00e2y d\u1ef1ng c\u00e1c giao di\u1ec7n l\u1eadp tr\u00ecnh \u1ee9ng d\u1ee5ng m\u1ea1nh m\u1ebd \u0111\u00f2i h\u1ecfi h\u01a1n c\u1ea3 vi\u1ec7c x\u00e1c \u0111\u1ecbnh c\u00e1c \u0111i\u1ec3m cu\u1ed1i v\u00e0 m\u00e3 tr\u1ea3 v\u1ec1. N\u00f3 \u0111\u00f2i h\u1ecfi s\u1ef1 hi\u1ec3u r\u00f5 r\u00f5 r\u00e0ng v\u1ec1 c\u00e1ch th\u00f4ng tin di chuy\u1ec3n qua m\u1ed9t h\u1ec7 th\u1ed1ng. S\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u (DFD) cung c\u1ea5p s\u1ef1 r\u00f5 r\u00e0ng v\u1ec1 c\u1ea5u tr\u00fac n\u00e0y. Khi \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng v\u00e0o t\u00e0i li\u1ec7u API, ch\u00fang bi\u1ebfn c\u00e1c \u0111\u1eb7c t\u1ea3 k\u1ef9 thu\u1eadt tr\u1eebu t\u01b0\u1ee3ng th\u00e0nh nh\u1eefng c\u00e2u chuy\u1ec7n tr\u1ef1c quan c\u1ee5 th\u1ec3. C\u00e1ch ti\u1ebfp c\u1eadn n\u00e0y gi\u00fap c\u00e1c b\u00ean li\u00ean quan, nh\u00e0 ph\u00e1t tri\u1ec3n v\u00e0 ng\u01b0\u1eddi d\u00f9ng hi\u1ec3u \u0111\u01b0\u1ee3c chu k\u1ef3 s\u1ed1ng c\u1ee7a d\u1eef li\u1ec7u m\u00e0 kh\u00f4ng c\u1ea7n ph\u1ea3i ph\u00e2n t\u00edch c\u00e1c m\u00f4 t\u1ea3 v\u0103n b\u1ea3n ph\u1ee9c t\u1ea1p.<\/p>\n

H\u01b0\u1edbng d\u1eabn n\u00e0y kh\u00e1m ph\u00e1 c\u00e1ch \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf c\u1ee7a DFD trong b\u1ed1i c\u1ea3nh thi\u1ebft k\u1ebf API. Ch\u00fang ta s\u1ebd xem x\u00e9t c\u00e1c th\u00e0nh ph\u1ea7n, c\u00e1c m\u1ee9c \u0111\u1ed9 tr\u1eebu t\u01b0\u1ee3ng v\u00e0 c\u00e1ch c\u00e1c s\u01a1 \u0111\u1ed3 n\u00e0y t\u00edch h\u1ee3p v\u1edbi c\u00e1c th\u1ef1c h\u00e0nh t\u00e0i li\u1ec7u chu\u1ea9n. M\u1ee5c ti\u00eau l\u00e0 t\u1ea1o ra s\u1ef1 hi\u1ec3u bi\u1ebft chung v\u1ec1 ki\u1ebfn tr\u00fac d\u1eef li\u1ec7u, h\u1ed7 tr\u1ee3 vi\u1ec7c b\u1ea3o tr\u00ec v\u00e0 m\u1edf r\u1ed9ng h\u1ec7 th\u1ed1ng.<\/p>\n

Hi\u1ec3u r\u00f5 kh\u00e1i ni\u1ec7m c\u1ed1t l\u00f5i \ud83e\udde9<\/h2>\n

S\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u l\u00e0 m\u1ed9t bi\u1ec3u di\u1ec5n \u0111\u1ed3 h\u1ecda v\u1ec1 lu\u1ed3ng d\u1eef li\u1ec7u qua m\u1ed9t h\u1ec7 th\u1ed1ng th\u00f4ng tin. Kh\u00e1c v\u1edbi s\u01a1 \u0111\u1ed3 tu\u1ea7n t\u1ef1, t\u1eadp trung v\u00e0o th\u1eddi gian v\u00e0 th\u1ee9 t\u1ef1, DFD t\u1eadp trung v\u00e0o
\n\u0111i\u1ec1u g\u00ec<\/strong>di chuy\u1ec3n v\u00e0 \u1edf \u0111\u00e2u<\/strong>n\u00f3 \u0111i \u0111\u1ebfn \u0111\u00e2u. Trong b\u1ed1i c\u1ea3nh m\u1ed9t API, s\u01a1 \u0111\u1ed3 n\u00e0y m\u00f4 t\u1ea3 s\u1ef1 t\u01b0\u01a1ng t\u00e1c gi\u1eefa c\u00e1c h\u1ec7 th\u1ed1ng b\u00ean ngo\u00e0i v\u00e0 logic x\u1eed l\u00fd n\u1ed9i b\u1ed9.<\/p>\n

H\u00e3y h\u00ecnh dung m\u1ed9t API nh\u01b0 m\u1ed9t c\u00e2y c\u1ea7u. DFD minh h\u1ecda d\u00f2ng giao th\u00f4ng \u0111i qua c\u00e2y c\u1ea7u \u0111\u00f3, c\u00e1c \u0111i\u1ec3m ki\u1ec3m tra \u1edf hai \u0111\u1ea7u, v\u00e0 c\u00e1c \u0111i\u1ec3m \u0111\u1ebfn b\u00ean trong h\u1ea1 t\u1ea7ng nh\u1eadn d\u1eef li\u1ec7u. S\u1ef1 tr\u1eebu t\u01b0\u1ee3ng tr\u1ef1c quan n\u00e0y r\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi c\u00e1c \u0111\u1ed9i ng\u0169 qu\u1ea3n l\u00fd c\u00e1c microservice ph\u1ee9c t\u1ea1p ho\u1eb7c t\u00edch h\u1ee3p h\u1ec7 th\u1ed1ng c\u0169.<\/p>\n

C\u00e1c th\u00e0nh ph\u1ea7n ch\u00ednh c\u1ee7a DFD cho API \ud83d\udcdd<\/h3>\n

\u0110\u1ec3 x\u00e2y d\u1ef1ng m\u1ed9t s\u01a1 \u0111\u1ed3 hi\u1ec7u qu\u1ea3, c\u1ea7n hi\u1ec3u r\u00f5 b\u1ed1n y\u1ebfu t\u1ed1 c\u01a1 b\u1ea3n \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong k\u00fd hi\u1ec7u chu\u1ea9n.<\/p>\n

    \n
  • C\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i:<\/strong> \u0110\u00e2y l\u00e0 c\u00e1c ngu\u1ed3n ho\u1eb7c \u0111\u00edch n\u1eb1m ngo\u00e0i ranh gi\u1edbi h\u1ec7 th\u1ed1ng. Trong thu\u1eadt ng\u1eef API, \u0111i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 l\u00e0 m\u1ed9t \u1ee9ng d\u1ee5ng di \u0111\u1ed9ng, m\u1ed9t d\u1ecbch v\u1ee5 b\u00ean th\u1ee9 ba ho\u1eb7c giao di\u1ec7n ng\u01b0\u1eddi d\u00f9ng con ng\u01b0\u1eddi. Ch\u00fang kh\u1edfi t\u1ea1o c\u00e1c y\u00eau c\u1ea7u ho\u1eb7c nh\u1eadn ph\u1ea3n h\u1ed3i.<\/li>\n
  • C\u00e1c qu\u00e1 tr\u00ecnh:<\/strong> \u0110\u00e2y l\u00e0 c\u00e1c h\u00e0nh \u0111\u1ed9ng bi\u1ebfn \u0111\u1ed5i d\u1eef li\u1ec7u. M\u1ed9t \u0111i\u1ec3m cu\u1ed1i API th\u01b0\u1eddng \u0111\u00f3ng vai tr\u00f2 l\u00e0 n\u00fat qu\u00e1 tr\u00ecnh. V\u00ed d\u1ee5, m\u1ed9t qu\u00e1 tr\u00ecnh “X\u00e1c th\u1ef1c ng\u01b0\u1eddi d\u00f9ng” nh\u1eadn th\u00f4ng tin \u0111\u0103ng nh\u1eadp v\u00e0 xu\u1ea5t ra m\u1ed9t m\u00e3 truy c\u1eadp.<\/li>\n
  • C\u00e1c kho d\u1eef li\u1ec7u:<\/strong> \u0110\u00e2y l\u00e0 c\u00e1c kho l\u01b0u tr\u1eef n\u01a1i th\u00f4ng tin \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef. M\u1ed9t c\u01a1 s\u1edf d\u1eef li\u1ec7u, b\u1ed9 nh\u1edb \u0111\u1ec7m ho\u1eb7c h\u1ec7 th\u1ed1ng t\u1ec7p thu\u1ed9c lo\u1ea1i n\u00e0y. API th\u01b0\u1eddng \u0111\u1ecdc t\u1eeb ho\u1eb7c ghi v\u00e0o c\u00e1c kho n\u00e0y.<\/li>\n
  • Lu\u1ed3ng d\u1eef li\u1ec7u:<\/strong> \u0110\u00e2y l\u00e0 c\u00e1c m\u0169i t\u00ean ch\u1ec9 s\u1ef1 di chuy\u1ec3n c\u1ee7a th\u00f4ng tin. M\u1ed7i \u0111\u01b0\u1eddng tr\u00ean s\u01a1 \u0111\u1ed3 \u0111\u1ea1i di\u1ec7n cho m\u1ed9t g\u00f3i d\u1eef li\u1ec7u \u0111ang di chuy\u1ec3n t\u1eeb m\u1ed9t th\u00e0nh ph\u1ea7n sang th\u00e0nh ph\u1ea7n kh\u00e1c.<\/li>\n<\/ul>\n

    C\u00e1c m\u1ee9c \u0111\u1ed9 tr\u1eebu t\u01b0\u1ee3ng \ud83d\udcc9<\/h2>\n

    C\u00e1c h\u1ec7 th\u1ed1ng ph\u1ee9c t\u1ea1p \u0111\u00f2i h\u1ecfi t\u00e0i li\u1ec7u \u1edf c\u00e1c m\u1ee9c \u0111\u1ed9 chi ti\u1ebft kh\u00e1c nhau. DFD h\u1ed7 tr\u1ee3 \u0111i\u1ec1u n\u00e0y th\u00f4ng qua ph\u01b0\u01a1ng ph\u00e1p ph\u00e2n c\u1ea5p. \u0110i\u1ec1u n\u00e0y cho ph\u00e9p c\u00e1c b\u00ean li\u00ean quan nh\u00ecn th\u1ea5y b\u1ee9c tranh t\u1ed5ng th\u1ec3 m\u00e0 kh\u00f4ng b\u1ecb l\u1ea1c trong chi ti\u1ebft tri\u1ec3n khai ngay l\u1eadp t\u1ee9c.<\/p>\n

    1. S\u01a1 \u0111\u1ed3 b\u1ed1i c\u1ea3nh (M\u1ee9c \u0111\u1ed9 0)<\/h3>\n

    S\u01a1 \u0111\u1ed3 b\u1ed1i c\u1ea3nh l\u00e0 m\u1ee9c \u0111\u1ed9 tr\u1eebu t\u01b0\u1ee3ng cao nh\u1ea5t. N\u00f3 th\u1ec3 hi\u1ec7n to\u00e0n b\u1ed9 h\u1ec7 th\u1ed1ng API nh\u01b0 m\u1ed9t qu\u00e1 tr\u00ecnh duy nh\u1ea5t v\u00e0 m\u1ed1i quan h\u1ec7 c\u1ee7a n\u00f3 v\u1edbi c\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i. N\u00f3 tr\u1ea3 l\u1eddi c\u00e2u h\u1ecfi: \u201cAPI n\u00e0y l\u00e0 g\u00ec, v\u00e0 ai \u0111ang s\u1eed d\u1ee5ng n\u00f3?\u201d<\/p>\n\n\n\n\n\n\n\n\n
    Th\u00e0nh ph\u1ea7n<\/th>\nM\u00f4 t\u1ea3<\/th>\n<\/tr>\n<\/thead>\n
    Qu\u00e1 tr\u00ecnh trung t\u00e2m<\/td>\n\u0110\u1ea1i di\u1ec7n cho to\u00e0n b\u1ed9 API.<\/td>\n<\/tr>\n
    Th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i<\/td>\n\u1ee8ng d\u1ee5ng kh\u00e1ch h\u00e0ng.<\/td>\n<\/tr>\n
    Th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i<\/td>\nM\u00e1y ch\u1ee7 c\u01a1 s\u1edf d\u1eef li\u1ec7u.<\/td>\n<\/tr>\n
    Lu\u1ed3ng d\u1eef li\u1ec7u<\/td>\nD\u1eef li\u1ec7u y\u00eau c\u1ea7u v\u00e0 ph\u1ea3n h\u1ed3i.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    S\u01a1 \u0111\u1ed3 n\u00e0y l\u00fd t\u01b0\u1edfng cho c\u00e1c cu\u1ed9c \u0111\u00e1nh gi\u00e1 ki\u1ebfn tr\u00fac c\u1ea5p cao. N\u00f3 x\u00e1c \u0111\u1ecbnh ranh gi\u1edbi cho h\u1ec7 th\u1ed1ng v\u00e0 \u0111\u1ecbnh ngh\u0129a ph\u1ea1m vi t\u00edch h\u1ee3p.<\/p>\n

    2. S\u01a1 \u0111\u1ed3 c\u1ea5p 0 (Ph\u00e2n r\u00e3 ch\u1ee9c n\u0103ng)<\/h3>\n

    Khi ranh gi\u1edbi \u0111\u00e3 r\u00f5 r\u00e0ng, qu\u00e1 tr\u00ecnh trung t\u00e2m s\u1ebd \u0111\u01b0\u1ee3c t\u00e1ch ra th\u00e0nh c\u00e1c qu\u00e1 tr\u00ecnh con ch\u00ednh. M\u1ee9c \u0111\u1ed9 n\u00e0y chia nh\u1ecf API th\u00e0nh c\u00e1c khu v\u1ef1c ch\u1ee9c n\u0103ng logic. V\u00ed d\u1ee5, m\u1ed9t API th\u01b0\u01a1ng m\u1ea1i \u0111i\u1ec7n t\u1eed c\u00f3 th\u1ec3 bao g\u1ed3m c\u00e1c quy tr\u00ecnh nh\u01b0 \u201cQu\u1ea3n l\u00fd \u0111\u01a1n h\u00e0ng\u201d, \u201cKi\u1ec3m tra t\u1ed3n kho\u201d v\u00e0 \u201cX\u1eed l\u00fd thanh to\u00e1n\u201d.<\/p>\n

    \u1ede giai \u0111o\u1ea1n n\u00e0y, s\u01a1 \u0111\u1ed3 ti\u1ebft l\u1ed9 c\u1ea5u tr\u00fac b\u00ean trong m\u00e0 kh\u00f4ng chi ti\u1ebft t\u1eebng c\u1ed5ng logic. N\u00f3 gi\u00fap c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n th\u1ea5y \u0111\u01b0\u1ee3c c\u00e1ch d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c chia t\u00e1ch v\u00e0 h\u1ee3p nh\u1ea5t qua c\u00e1c m\u00f4-\u0111un ch\u1ee9c n\u0103ng kh\u00e1c nhau.<\/p>\n

    3. S\u01a1 \u0111\u1ed3 c\u1ea5p 1 (Logic chi ti\u1ebft)<\/h3>\n

    \u0110\u00e2y l\u00e0 m\u1ee9c \u0111\u1ed9 chi ti\u1ebft nh\u1ea5t. M\u1ed7i qu\u00e1 tr\u00ecnh t\u1eeb c\u1ea5p 0 s\u1ebd \u0111\u01b0\u1ee3c chia nh\u1ecf h\u01a1n n\u1eefa. \u0110\u00e2y l\u00e0 n\u01a1i c\u00e1c \u0111i\u1ec3m cu\u1ed1i API c\u1ee5 th\u1ec3 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n. N\u00f3 cho th\u1ea5y ch\u00ednh x\u00e1c c\u00e1c tr\u01b0\u1eddng d\u1eef li\u1ec7u n\u00e0o c\u1ea7n thi\u1ebft cho m\u1ed9t h\u00e0nh \u0111\u1ed9ng c\u1ee5 th\u1ec3 v\u00e0 k\u1ebft qu\u1ea3 \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef \u1edf \u0111\u00e2u.<\/p>\n

    M\u1ee9c \u0111\u1ed9 n\u00e0y r\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi vi\u1ec7c gi\u1edbi thi\u1ec7u nh\u00e0 ph\u00e1t tri\u1ec3n m\u1edbi. N\u00f3 cung c\u1ea5p b\u1ea3n \u0111\u1ed3 lu\u1ed3ng logic b\u1ed5 tr\u1ee3 cho m\u00e3 ngu\u1ed3n.<\/p>\n

    T\u1ea1i sao DFD c\u1ea3i thi\u1ec7n t\u00e0i li\u1ec7u API \ud83d\udee1\ufe0f<\/h2>\n

    T\u00e0i li\u1ec7u API ti\u00eau chu\u1ea9n th\u01b0\u1eddng ph\u1ee5 thu\u1ed9c r\u1ea5t nhi\u1ec1u v\u00e0o v\u0103n b\u1ea3n v\u00e0 \u0111o\u1ea1n m\u00e3. M\u1eb7c d\u00f9 c\u1ea7n thi\u1ebft, v\u0103n b\u1ea3n c\u00f3 th\u1ec3 d\u00e0y \u0111\u1eb7c v\u00e0 kh\u00f3 h\u00ecnh dung. M\u1ed9t DFD th\u00eam m\u1ed9t l\u1edbp hi\u1ec3u bi\u1ebft m\u00e0 v\u0103n b\u1ea3n \u0111\u01a1n thu\u1ea7n kh\u00f4ng th\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c.<\/p>\n

    1. L\u00e0m r\u00f5 ranh gi\u1edbi d\u1eef li\u1ec7u<\/h3>\n

    B\u1ea3o m\u1eadt l\u00e0 m\u1ed1i quan t\u00e2m h\u00e0ng \u0111\u1ea7u trong ph\u00e1t tri\u1ec3n hi\u1ec7n \u0111\u1ea1i. DFD hi\u1ec3n th\u1ecb r\u00f5 r\u00e0ng n\u01a1i d\u1eef li\u1ec7u v\u01b0\u1ee3t qua ranh gi\u1edbi h\u1ec7 th\u1ed1ng. B\u1eb1ng c\u00e1ch x\u00e1c \u0111\u1ecbnh r\u00f5 c\u00e1c th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i, c\u00e1c \u0111\u1ed9i nh\u00f3m c\u00f3 th\u1ec3 tri\u1ec3n khai x\u00e1c th\u1ef1c v\u00e0 \u1ee7y quy\u1ec1n t\u1ed1t h\u01a1n t\u1ea1i c\u00e1c \u0111i\u1ec3m ph\u00f9 h\u1ee3p. Vi\u1ec7c d\u1eef li\u1ec7u nh\u1ea1y c\u1ea3m \u0111i v\u00e0o hay r\u1eddi kh\u1ecfi khu v\u1ef1c \u0111\u00e1ng tin c\u1eady tr\u1edf n\u00ean r\u00f5 r\u00e0ng v\u1ec1 m\u1eb7t tr\u1ef1c quan.<\/p>\n

    2. Gi\u1ea3m thi\u1ec3u s\u1ef1 m\u01a1 h\u1ed3<\/h3>\n

    M\u00f4 t\u1ea3 v\u0103n b\u1ea3n v\u1ec1 lu\u1ed3ng d\u1eef li\u1ec7u c\u00f3 th\u1ec3 b\u1ecb hi\u1ec3u nh\u1ea7m. \u201cH\u1ec7 th\u1ed1ng g\u1eedi d\u1eef li\u1ec7u \u0111\u1ebfn c\u01a1 s\u1edf d\u1eef li\u1ec7u\u201d c\u00f3 th\u1ec3 \u00e1m ch\u1ec9 thao t\u00e1c ghi, \u0111\u1ecdc ho\u1eb7c c\u1eadp nh\u1eadt. M\u1ed9t DFD s\u1eed d\u1ee5ng c\u00e1c h\u00ecnh d\u1ea1ng v\u00e0 m\u0169i t\u00ean c\u1ee5 th\u1ec3 \u0111\u1ec3 ch\u1ec9 h\u01b0\u1edbng v\u00e0 lo\u1ea1i. \u0110i\u1ec1u n\u00e0y gi\u1ea3m t\u1ea3i nh\u1eadn th\u1ee9c cho ng\u01b0\u1eddi \u0111\u1ecdc khi c\u1ed1 g\u1eafng hi\u1ec3u ki\u1ebfn tr\u00fac.<\/p>\n

    3. H\u1ed7 tr\u1ee3 g\u1ee1 l\u1ed7i<\/h3>\n

    Khi m\u1ed9t t\u00edch h\u1ee3p th\u1ea5t b\u1ea1i, vi\u1ec7c c\u00f3 b\u1ea3n \u0111\u1ed3 tr\u1ef1c quan v\u1ec1 \u0111\u01b0\u1eddng \u0111i d\u1eef li\u1ec7u mong \u0111\u1ee3i l\u00e0 v\u00f4 gi\u00e1. C\u00e1c k\u1ef9 s\u01b0 c\u00f3 th\u1ec3 theo d\u00f5i lu\u1ed3ng tr\u00ean s\u01a1 \u0111\u1ed3 \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh \u0111i\u1ec3m x\u1ea3y ra s\u1ef1 c\u1ed1. D\u1eef li\u1ec7u c\u00f3 \u0111ang kh\u00f4ng \u0111\u1ebfn \u0111\u01b0\u1ee3c qu\u00e1 tr\u00ecnh? K\u1ebft qu\u1ea3 t\u1eeb qu\u00e1 tr\u00ecnh c\u00f3 \u0111ang kh\u00f4ng \u0111\u1ebfn \u0111\u01b0\u1ee3c \u0111\u00edch?<\/p>\n

    T\u00edch h\u1ee3p DFD v\u1edbi c\u00e1c t\u00e0i li\u1ec7u k\u1ef9 thu\u1eadt \ud83d\udd04<\/h2>\n

    DFD kh\u00f4ng thay th\u1ebf c\u00e1c t\u00e0i li\u1ec7u OpenAPI hay s\u01a1 \u0111\u1ed3 GraphQL. Ch\u00fang b\u1ed5 sung cho nhau. C\u00e1c t\u00e0i li\u1ec7u d\u1ef1a tr\u00ean v\u0103n b\u1ea3n \u0111\u1ecbnh ngh\u0129a ng\u1eef ph\u00e1p (c\u00e1c quy t\u1eafc), trong khi DFD \u0111\u1ecbnh ngh\u0129a ng\u1eef ngh\u0129a (\u00fd ngh\u0129a v\u00e0 lu\u1ed3ng).<\/p>\n

    \u0110\u1ec3 t\u00edch h\u1ee3p hi\u1ec7u qu\u1ea3, h\u00e3y xem x\u00e9t quy tr\u00ecnh sau:<\/p>\n

      \n
    1. X\u00e1c \u0111\u1ecbnh l\u01b0\u1ee3c \u0111\u1ed3:<\/strong>T\u1ea1o t\u00e0i li\u1ec7u m\u00f4 t\u1ea3 API tr\u01b0\u1edbc ti\u00ean. \u0110i\u1ec1u n\u00e0y x\u00e1c \u0111\u1ecbnh \u0111\u1ea7u v\u00e0o v\u00e0 \u0111\u1ea7u ra.<\/li>\n
    2. B\u1ea3n \u0111\u1ed3 lu\u1ed3ng:<\/strong>S\u1eed d\u1ee5ng t\u00e0i li\u1ec7u \u0111\u1ec3 v\u1ebd DFD. G\u00e1n m\u1ed7i \u0111i\u1ec3m cu\u1ed1i v\u00e0o m\u1ed9t n\u00fat qu\u00e1 tr\u00ecnh.<\/li>\n
    3. X\u00e1c minh t\u00ednh nh\u1ea5t qu\u00e1n:<\/strong>Xem x\u00e9t s\u01a1 \u0111\u1ed3 \u0111\u1ed1i chi\u1ebfu v\u1edbi t\u00e0i li\u1ec7u. \u0110\u1ea3m b\u1ea3o m\u1ecdi lu\u1ed3ng d\u1eef li\u1ec7u trong s\u01a1 \u0111\u1ed3 \u0111\u1ec1u c\u00f3 \u0111i\u1ec3m cu\u1ed1i t\u01b0\u01a1ng \u1ee9ng trong t\u00e0i li\u1ec7u.<\/li>\n
    4. C\u1eadp nh\u1eadt c\u00f9ng l\u00fac:<\/strong>Xem s\u01a1 \u0111\u1ed3 nh\u01b0 t\u00e0i li\u1ec7u s\u1ed1ng. N\u1ebfu \u0111i\u1ec3m cu\u1ed1i thay \u0111\u1ed5i, h\u00e3y c\u1eadp nh\u1eadt s\u01a1 \u0111\u1ed3 ngay l\u1eadp t\u1ee9c.<\/li>\n<\/ol>\n

      C\u00e1c c\u00e2n nh\u1eafc v\u1ec1 b\u1ea3o m\u1eadt v\u00e0 quy\u1ec1n ri\u00eang t\u01b0 \ud83d\udd10<\/h2>\n

      Khi t\u00e0i li\u1ec7u lu\u1ed3ng d\u1eef li\u1ec7u, c\u00e1c quy \u0111\u1ecbnh v\u1ec1 quy\u1ec1n ri\u00eang t\u01b0 nh\u01b0 GDPR hay CCPA ph\u1ea3i \u0111\u01b0\u1ee3c xem x\u00e9t. M\u1ed9t s\u01a1 \u0111\u1ed3 DFD \u0111\u01b0\u1ee3c v\u1ebd t\u1ed1t s\u1ebd l\u00e0m n\u1ed5i b\u1eadt n\u01a1i d\u1eef li\u1ec7u th\u00f4ng tin nh\u1eadn d\u1ea1ng c\u00e1 nh\u00e2n (PII) di chuy\u1ec3n.<\/p>\n

      B\u1eb1ng c\u00e1ch \u0111\u00e1nh d\u1ea5u c\u00e1c lu\u1ed3ng d\u1eef li\u1ec7u c\u1ee5 th\u1ec3 v\u1edbi m\u1ee9c \u0111\u1ed9 nh\u1ea1y c\u1ea3m, c\u00e1c \u0111\u1ed9i nh\u00f3m c\u00f3 th\u1ec3 \u0111\u1ea3m b\u1ea3o m\u00e3 h\u00f3a d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng \u1edf n\u01a1i c\u1ea7n thi\u1ebft. V\u00ed d\u1ee5, m\u1ed9t lu\u1ed3ng chuy\u1ec3n d\u1eef li\u1ec7u t\u1eeb th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i \u0111\u1ebfn kho l\u01b0u tr\u1eef d\u1eef li\u1ec7u n\u00ean \u0111\u01b0\u1ee3c \u0111\u00e1nh d\u1ea5u l\u00e0 \u201c\u0110\u01b0\u1ee3c m\u00e3 h\u00f3a\u201d n\u1ebfu n\u00f3 ch\u1ee9a th\u00f4ng tin \u0111\u0103ng nh\u1eadp ng\u01b0\u1eddi d\u00f9ng.<\/p>\n

      H\u01a1n n\u1eefa, DFD gi\u00fap ph\u00e1t hi\u1ec7n c\u00e1c \u0111\u01b0\u1eddng \u0111i d\u1eef li\u1ec7u kh\u00f4ng \u0111\u01b0\u1ee3c ph\u00e9p. N\u1ebfu s\u01a1 \u0111\u1ed3 cho th\u1ea5y d\u1eef li\u1ec7u di chuy\u1ec3n t\u1eeb m\u1ed9t kho l\u01b0u tr\u1eef n\u1ed9i b\u1ed9 an to\u00e0n \u0111\u1ebfn m\u1ed9t th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i m\u00e0 kh\u00f4ng c\u00f3 n\u00fat qu\u00e1 tr\u00ecnh \u1edf gi\u1eefa, \u0111i\u1ec1u \u0111\u00f3 cho th\u1ea5y m\u1ed9t l\u1ed7 h\u1ed5ng b\u1ea3o m\u1eadt ti\u1ec1m t\u00e0ng c\u1ea7n \u0111\u01b0\u1ee3c x\u1eed l\u00fd.<\/p>\n

      C\u00e1c th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t cho b\u1ea3o tr\u00ec \ud83d\udccb<\/h2>\n

      T\u00e0i li\u1ec7u th\u01b0\u1eddng tr\u1edf n\u00ean l\u1ed7i th\u1eddi v\u00ec kh\u00f3 duy tr\u00ec. \u0110\u1ec3 gi\u1eef cho DFD h\u1eefu \u00edch, h\u00e3y tu\u00e2n theo c\u00e1c h\u01b0\u1edbng d\u1eabn sau.<\/p>\n

      Gi\u1eef \u0111\u01a1n gi\u1ea3n<\/h3>\n

      \u0110\u1eebng c\u1ed1 g\u1eafng ghi l\u1ea1i t\u1eebng d\u00f2ng m\u00e3 ngu\u1ed3n trong s\u01a1 \u0111\u1ed3. H\u00e3y t\u1eadp trung v\u00e0o lu\u1ed3ng logic. N\u1ebfu s\u01a1 \u0111\u1ed3 tr\u1edf n\u00ean qu\u00e1 ch\u1eadt ch\u1ed9i, n\u00f3 s\u1ebd m\u1ea5t gi\u00e1 tr\u1ecb. Chia c\u00e1c quy tr\u00ecnh ph\u1ee9c t\u1ea1p th\u00e0nh c\u00e1c s\u01a1 \u0111\u1ed3 ri\u00eang bi\u1ec7t n\u1ebfu c\u1ea7n thi\u1ebft.<\/p>\n

      S\u1eed d\u1ee5ng k\u00fd hi\u1ec7u nh\u1ea5t qu\u00e1n<\/h3>\n

      \u0110\u1ea3m b\u1ea3o m\u1ecdi ng\u01b0\u1eddi trong nh\u00f3m \u0111\u1ec1u hi\u1ec3u c\u00e1c k\u00fd hi\u1ec7u \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng. N\u1ebfu b\u1ea1n d\u00f9ng m\u1ed9t h\u00ecnh d\u1ea1ng c\u1ee5 th\u1ec3 cho c\u01a1 s\u1edf d\u1eef li\u1ec7u, \u0111\u1eebng d\u00f9ng h\u00ecnh d\u1ea1ng kh\u00e1c cho b\u1ed9 nh\u1edb \u0111\u1ec7m tr\u1eeb khi c\u00f3 l\u00fd do r\u00f5 r\u00e0ng. T\u00ednh nh\u1ea5t qu\u00e1n s\u1ebd gi\u1ea3m thi\u1ec3u kh\u00f3 kh\u0103n khi \u0111\u1ecdc t\u00e0i li\u1ec7u.<\/p>\n

      Ki\u1ec3m so\u00e1t phi\u00ean b\u1ea3n<\/h3>\n

      L\u01b0u s\u01a1 \u0111\u1ed3 trong c\u00f9ng m\u1ed9t kho l\u01b0u tr\u1eef v\u1edbi m\u00e3 ngu\u1ed3n. S\u1eed d\u1ee5ng ki\u1ec3m so\u00e1t phi\u00ean b\u1ea3n \u0111\u1ec3 theo d\u00f5i c\u00e1c thay \u0111\u1ed5i theo th\u1eddi gian. L\u1ecbch s\u1eed n\u00e0y gi\u00fap c\u00e1c nh\u00f3m th\u1ea5y \u0111\u01b0\u1ee3c s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a ki\u1ebfn tr\u00fac d\u1eef li\u1ec7u, \u0111i\u1ec1u n\u00e0y r\u1ea5t h\u1eefu \u00edch trong c\u00e1c cu\u1ed9c ki\u1ec3m to\u00e1n ho\u1eb7c \u0111\u00e1nh gi\u00e1 sau d\u1ef1 \u00e1n.<\/p>\n

      H\u1ee3p t\u00e1c gi\u1eefa c\u00e1c \u0111\u1ed9i ng\u0169 \ud83e\udd1d<\/h2>\n

      API n\u1eb1m \u1edf giao \u0111i\u1ec3m gi\u1eefa c\u00e1c nh\u00f3m frontend, backend v\u00e0 h\u1ea1 t\u1ea7ng. M\u1ed9t ng\u00f4n ng\u1eef h\u00ecnh \u1ea3nh chung gi\u00fap th\u00fac \u0111\u1ea9y giao ti\u1ebfp.<\/p>\n

      Khi m\u1ed9t nh\u00e0 ph\u00e1t tri\u1ec3n frontend c\u1ea7n bi\u1ebft d\u1eef li\u1ec7u m\u00e0 API tr\u1ea3 v\u1ec1, h\u1ecd s\u1ebd xem c\u00e1c lu\u1ed3ng \u0111\u1ea7u ra tr\u00ean s\u01a1 \u0111\u1ed3. Khi m\u1ed9t nh\u00e0 ph\u00e1t tri\u1ec3n backend c\u1ea7n bi\u1ebft \u0111i\u1ec1u g\u00ec k\u00edch ho\u1ea1t m\u1ed9t quy tr\u00ecnh, h\u1ecd s\u1ebd xem c\u00e1c lu\u1ed3ng \u0111\u1ea7u v\u00e0o. \u0110i\u1ec3m tham chi\u1ebfu chung n\u00e0y gi\u1ea3m nhu c\u1ea7u t\u1ed5 ch\u1ee9c c\u00e1c cu\u1ed9c h\u1ecdp d\u00e0i \u0111\u1ec3 gi\u1ea3i th\u00edch c\u00e1c t\u01b0\u01a1ng t\u00e1c c\u01a1 b\u1ea3n.<\/p>\n

      N\u00f3 c\u0169ng h\u1ed7 tr\u1ee3 c\u00e1c b\u00ean li\u00ean quan kh\u00f4ng chuy\u00ean. C\u00e1c qu\u1ea3n l\u00fd s\u1ea3n ph\u1ea9m v\u00e0 nh\u00e0 ph\u00e2n t\u00edch kinh doanh c\u00f3 th\u1ec3 xem DFD \u0111\u1ec3 hi\u1ec3u t\u00e1c \u0111\u1ed9ng c\u1ee7a m\u1ed9t y\u00eau c\u1ea7u t\u00ednh n\u0103ng m\u00e0 kh\u00f4ng c\u1ea7n \u0111\u1ecdc c\u00e1c t\u00e0i li\u1ec7u k\u1ef9 thu\u1eadt.<\/p>\n

      V\u00ed d\u1ee5 t\u00ecnh hu\u1ed1ng: X\u00e1c th\u1ef1c ng\u01b0\u1eddi d\u00f9ng \ud83d\udd11<\/h2>\n

      H\u00e3y xem x\u00e9t m\u1ed9t lu\u1ed3ng x\u00e1c th\u1ef1c ti\u00eau chu\u1ea9n. M\u1ed9t th\u1ef1c th\u1ec3 b\u00ean ngo\u00e0i (\u1ee9ng d\u1ee5ng di \u0111\u1ed9ng) g\u1eedi th\u00f4ng tin \u0111\u0103ng nh\u1eadp \u0111\u1ebfn API (quy tr\u00ecnh). API x\u00e1c minh th\u00f4ng tin \u0111\u0103ng nh\u1eadp v\u1edbi C\u01a1 s\u1edf d\u1eef li\u1ec7u Ng\u01b0\u1eddi d\u00f9ng (kho d\u1eef li\u1ec7u). N\u1ebfu h\u1ee3p l\u1ec7, API s\u1ebd t\u1ea1o m\u1ed9t m\u00e3 th\u00f4ng b\u00e1o v\u00e0 g\u1eedi l\u1ea1i cho \u1ee9ng d\u1ee5ng di \u0111\u1ed9ng.<\/p>\n

      Trong s\u01a1 \u0111\u1ed3 DFD, \u0111i\u1ec1u n\u00e0y \u0111\u01b0\u1ee3c th\u1ec3 hi\u1ec7n nh\u01b0 sau:<\/p>\n

        \n
      • M\u0169i t\u00ean t\u1eeb \u1ee8ng d\u1ee5ng di \u0111\u1ed9ng \u0111\u1ebfn Quy tr\u00ecnh API \u0111\u01b0\u1ee3c ghi nh\u00e3n \u201cY\u00eau c\u1ea7u \u0111\u0103ng nh\u1eadp\u201d.<\/li>\n
      • M\u0169i t\u00ean t\u1eeb Quy tr\u00ecnh API \u0111\u1ebfn C\u01a1 s\u1edf d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c ghi nh\u00e3n \u201cX\u00e1c minh th\u00f4ng tin \u0111\u0103ng nh\u1eadp\u201d.<\/li>\n
      • M\u0169i t\u00ean t\u1eeb C\u01a1 s\u1edf d\u1eef li\u1ec7u \u0111\u1ebfn Quy tr\u00ecnh API \u0111\u01b0\u1ee3c ghi nh\u00e3n \u201cD\u1eef li\u1ec7u ng\u01b0\u1eddi d\u00f9ng\u201d.<\/li>\n
      • M\u0169i t\u00ean t\u1eeb Quy tr\u00ecnh API \u0111\u1ebfn \u1ee8ng d\u1ee5ng di \u0111\u1ed9ng \u0111\u01b0\u1ee3c ghi nh\u00e3n \u201cM\u00e3 x\u00e1c th\u1ef1c\u201d.<\/li>\n<\/ul>\n

        H\u00ecnh \u1ea3nh \u0111\u01a1n gi\u1ea3n n\u00e0y ghi l\u1ea1i to\u00e0n b\u1ed9 qu\u00e1 tr\u00ecnh thi\u1ebft l\u1eadp b\u1ea3o m\u1eadt. N\u00f3 nh\u1ea5n m\u1ea1nh r\u1eb1ng th\u00f4ng tin \u0111\u0103ng nh\u1eadp r\u1eddi kh\u1ecfi client, \u0111i qua backend, t\u01b0\u01a1ng t\u00e1c v\u1edbi l\u01b0u tr\u1eef v\u00e0 cu\u1ed1i c\u00f9ng t\u1ea1o ra m\u1ed9t m\u00e3 th\u00f4ng b\u00e1o. B\u1ea5t k\u1ef3 s\u1ef1 sai l\u1ec7ch n\u00e0o kh\u1ecfi lu\u1ed3ng n\u00e0y trong m\u00e3 th\u1ef1c t\u1ebf s\u1ebd ngay l\u1eadp t\u1ee9c hi\u1ec3n th\u1ecb r\u00f5 r\u00e0ng nh\u01b0 m\u1ed9t s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa s\u01a1 \u0111\u1ed3 v\u00e0 tri\u1ec3n khai.<\/p>\n

        K\u1ebft lu\u1eadn \ud83c\udfaf<\/h2>\n

        S\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u cung c\u1ea5p c\u00e1ch c\u00f3 c\u1ea5u tr\u00fac \u0111\u1ec3 ghi ch\u00e9p v\u1ec1 s\u1ef1 di chuy\u1ec3n th\u00f4ng tin trong h\u1ec7 sinh th\u00e1i API. Ch\u00fang t\u1ea1o ra s\u1ef1 k\u1ebft n\u1ed1i gi\u1eefa logic tr\u1eebu t\u01b0\u1ee3ng v\u00e0 tri\u1ec3n khai c\u1ee5 th\u1ec3. B\u1eb1ng c\u00e1ch tr\u1ef1c quan h\u00f3a \u0111\u1ea7u v\u00e0o, quy tr\u00ecnh v\u00e0 \u0111\u1ea7u ra, c\u00e1c nh\u00f3m c\u00f3 th\u1ec3 \u0111\u1ea3m b\u1ea3o s\u1ef1 r\u00f5 r\u00e0ng, b\u1ea3o m\u1eadt v\u00e0 kh\u1ea3 n\u0103ng b\u1ea3o tr\u00ec.<\/p>\n

        Vi\u1ec7c \u00e1p d\u1ee5ng th\u1ef1c h\u00e0nh n\u00e0y kh\u00f4ng \u0111\u00f2i h\u1ecfi c\u00f4ng c\u1ee5 ph\u1ee9c t\u1ea1p hay chi ph\u00ed l\u1edbn. N\u00f3 \u0111\u00f2i h\u1ecfi cam k\u1ebft v\u1ec1 giao ti\u1ebfp tr\u1ef1c quan v\u00e0 t\u00ednh nh\u1ea5t qu\u00e1n. Khi h\u1ec7 th\u1ed1ng ng\u00e0y c\u00e0ng ph\u1ee9c t\u1ea1p, gi\u00e1 tr\u1ecb c\u1ee7a b\u1ea3n \u0111\u1ed3 r\u00f5 r\u00e0ng v\u1ec1 lu\u1ed3ng d\u1eef li\u1ec7u s\u1ebd t\u0103ng t\u01b0\u01a1ng \u1ee9ng. \u0110\u1ea7u t\u01b0 th\u1eddi gian v\u00e0o c\u00e1c s\u01a1 \u0111\u1ed3 n\u00e0y s\u1ebd mang l\u1ea1i l\u1ee3i \u00edch r\u00f5 r\u1ec7t trong vi\u1ec7c gi\u1ea3m l\u1ed7i, r\u00fat ng\u1eafn th\u1eddi gian l\u00e0m quen v\u00e0 ki\u1ebfn tr\u00fac an to\u00e0n h\u01a1n.<\/p>\n

        B\u1eaft \u0111\u1ea7u nh\u1ecf. Ghi ch\u00e9p s\u01a1 \u0111\u1ed3 b\u1ed1i c\u1ea3nh cho API ch\u00ednh c\u1ee7a b\u1ea1n. M\u1edf r\u1ed9ng d\u1ea7n khi h\u1ec7 th\u1ed1ng ph\u00e1t tri\u1ec3n. K\u1ebft qu\u1ea3 s\u1ebd l\u00e0 t\u00e0i li\u1ec7u kh\u00f4ng ch\u1ec9 \u0111\u01b0\u1ee3c \u0111\u1ecdc, m\u00e0 c\u00f2n \u0111\u01b0\u1ee3c hi\u1ec3u.<\/p>\n

        \u00a0<\/p>\n","protected":false},"excerpt":{"rendered":"

        X\u00e2y d\u1ef1ng c\u00e1c giao di\u1ec7n l\u1eadp tr\u00ecnh \u1ee9ng d\u1ee5ng m\u1ea1nh m\u1ebd \u0111\u00f2i h\u1ecfi h\u01a1n c\u1ea3 vi\u1ec7c x\u00e1c \u0111\u1ecbnh c\u00e1c \u0111i\u1ec3m cu\u1ed1i v\u00e0 m\u00e3 tr\u1ea3 v\u1ec1. N\u00f3 \u0111\u00f2i h\u1ecfi s\u1ef1 hi\u1ec3u…<\/p>\n","protected":false},"author":1,"featured_media":528,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_title":"S\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u cho t\u00e0i li\u1ec7u API \ud83d\udcca","_yoast_wpseo_metadesc":"H\u1ecdc c\u00e1ch s\u1eed d\u1ee5ng s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u cho t\u00e0i li\u1ec7u API. Tr\u1ef1c quan h\u00f3a s\u1ef1 di chuy\u1ec3n d\u1eef li\u1ec7u, c\u1ea3i thi\u1ec7n \u0111\u1ed9 r\u00f5 r\u00e0ng v\u00e0 t\u1ed1i \u01b0u h\u00f3a quy tr\u00ecnh t\u00edch h\u1ee3p m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3.","fifu_image_url":"","fifu_image_alt":"","footnotes":""},"categories":[46],"tags":[40,45],"class_list":["post-527","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-data-flow-diagram","tag-academic","tag-data-flow-diagram"],"yoast_head":"\nS\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u cho t\u00e0i li\u1ec7u API \ud83d\udcca<\/title>\n<meta name=\"description\" content=\"H\u1ecdc c\u00e1ch s\u1eed d\u1ee5ng s\u01a1 \u0111\u1ed3 lu\u1ed3ng d\u1eef li\u1ec7u cho t\u00e0i li\u1ec7u API. 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