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FastAPI Internals

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 Trylesinski, Marcelo

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FastAPI Internals
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FastAPI became one of the most web frameworks in Python. It has an amazing documentation, and easy to use API, which made it very popular. It's easy to start, and as a developer you have a lot of power on what you can do. But... How does it work internally? In this talk, we will explore the internals of FastAPI. We'll explore the dependency injection system, what are the benefits, and limitations. We'll also see how the routing system works, when the middleware stack runs, how the request and response are handled in detail, how the OpenAPI schema is generated, and the differences between async and non-async endpoints, and how WebSockets fit in the whole picture. Furthermore, we'll also see how the dependencies Pydantic and Starlette help FastAPI on its job. At the end of this talk, the attendee will understand what's underneath of this very popular package.
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Intrusion detection systemSoftware frameworkOperations support systemSoftware maintenanceExtension (kinesiology)Server (computing)Interface (computing)Gateway (telecommunications)Mobile appImplementationStandard deviationRepository (publishing)CASE <Informatik>FreewareStorage area networkRevision controlClient (computing)Numbering schemeTrailEmailBitClient (computing)Server (computing)Revision controlMessage passingEmailLengthCartesian coordinate systemFile formatCodeEvent horizonProcess (computing)Dependent and independent variablesMereologyTerm (mathematics)Exception handlingObject (grammar)Connected spaceError messageParameter (computer programming)Level (video gaming)Software frameworkSoftware maintenanceValidity (statistics)Cycle (graph theory)Mobile appWeb 2.0Open setElectric generatorInformationMaizeHypercubeMetropolitan area networkSynchronizationType theoryTelecommunicationMultiplication signComputer animationLecture/Conference
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Client (computing)Stack (abstract data type)MiddlewareCartesian coordinate systemServer (computing)Exception handlingError message9K33 OsaRoutingInjektivitätMiddlewareRootDependent and independent variablesCASE <Informatik>ImplementationError messageServer (computing)State observerEmailClient (computing)Exception handlingPoint (geometry)Cartesian coordinate systemAxiom of choiceDataflowInformationEndomorphismenmonoidCodeArrow of timeForm (programming)Event horizonRight angleFlow separationMereologyResultantNumberSystem callCache (computing)Cycle (graph theory)Line (geometry)Patch (Unix)Parameter (computer programming)Message passingMultiplication signMatching (graph theory)2 (number)RoutingSoftware frameworkStack (abstract data type)Computer animationLecture/Conference
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InjektivitätSynchronizationCASE <Informatik>outputFunction (mathematics)SynchronizationServer (computing)CASE <Informatik>Software developerEmailFunction (mathematics)Point (geometry)Client (computing)CodeThread (computing)Proper mapEvent horizonFile formatResultantString (computer science)Cache (computing)System callFunctional (mathematics)Hash functionMobile appLoginDifferent (Kate Ryan album)Social classInsertion lossDatabaseType theoryData storage deviceEndliche ModelltheorieIntegeroutputNeuroinformatikMiddlewareField (computer science)Loop (music)Right angleComputer animationLecture/Conference
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Function (mathematics)outputArc (geometry)SatelliteMetra potential methodFunctional (mathematics)EndomorphismenmonoidClient (computing)BitWeb 2.0Instance (computer science)Line (geometry)Slide ruleFile formatSocket-SchnittstelleParameter (computer programming)CodeServer (computing)Point (geometry)Type theorySubsetComputer animation
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Client (computing)Hand fanTelecommunicationSynchronizationRepository (publishing)Loop (music)Event horizonBefehlsprozessorThread (computing)Context awarenessProduct (business)Point (geometry)CodeIntegrated development environmentThresholding (image processing)Web 2.0Task (computing)State observerComputer animationLecture/Conference
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Design of experimentsGraphics tabletOrder (biology)String (computer science)Poisson-KlammerMatching (graph theory)Uniform resource locatorView (database)Slide ruleRouter (computing)RootComputer virus2 (number)WordLatent heatLecture/Conference
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Operations support systemWorld Wide Web ConsortiumString (computer science)RoutingLine (geometry)Uniform resource locatorRouter (computing)View (database)Right angleLecture/ConferenceComputer animationMeeting/Interview
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RoutingRootView (database)Arithmetic progressionRouter (computing)CodeComputer animation
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GEDCOMSupremumoutputFunction (mathematics)GoogolUniform resource locatorInsertion lossDatabaseSlide rulePattern languageGame controllerOrder (biology)Software frameworkRootSocial classInjektivitätState of matterInstance (computer science)Single-precision floating-point formatGoodness of fitRoutingMobile appLecture/ConferenceComputer animation
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Link (knot theory)Endliche ModelltheorieDependent and independent variablesPressureProcess (computing)Software frameworkOrder (biology)Digital filterComputer programmingPhysical systemStandard deviationFunction (mathematics)Virtual machineData modelPredictionFormal languageWindowLoop (music)Ext functorFeedbackMultitier architectureWrapper (data mining)Beta functionComputer fileRootModul <Datentyp>ForceInjektivitätMobile appMeta elementBoilerplate (text)Event horizonProgrammable read-only memoryPole (complex analysis)View (database)WebsiteBookmark (World Wide Web)Control flowSoftware maintenanceMultiplication signSimilarity (geometry)Keyboard shortcutInjektivitätComputer animation
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Roundness (object)Lecture/ConferenceComputer animation
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