1 | import {
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2 | Context as LambdaContext,
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3 | Handler as LambdaHandler
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4 | } from 'aws-lambda'
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5 |
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6 | declare type PluginHook = () => void
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7 | declare type PluginHookWithMiddlewareName = (middlewareName: string) => void
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8 | declare type PluginHookPromise = () => Promise<any>
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9 |
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10 | interface PluginObject {
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11 | beforePrefetch?: PluginHook
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12 | requestStart?: PluginHook
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13 | beforeMiddleware?: PluginHookWithMiddlewareName
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14 | afterMiddleware?: PluginHookWithMiddlewareName
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15 | beforeHandler?: PluginHook
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16 | afterHandler?: PluginHook
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17 | requestEnd?: PluginHookPromise
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18 | }
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19 |
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20 | interface Request<TEvent = any, TResult = any, TErr = Error, TContext extends LambdaContext = any> {
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21 | event: TEvent
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22 | context: TContext
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23 | response: TResult | null
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24 | error: TErr | null
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25 | internal: {
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26 | [key: string]: any
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27 | }
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28 | }
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29 |
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30 | declare type MiddlewareFn<TEvent = any, TResult = any, TErr = Error, TContext extends LambdaContext = any> = (request: Request<TEvent, TResult, TErr, TContext>) => any
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31 |
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32 | export interface MiddlewareObj<TEvent = any, TResult = any, TErr = Error, TContext extends LambdaContext = any> {
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33 | before?: MiddlewareFn<TEvent, TResult, TErr, TContext>
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34 | after?: MiddlewareFn<TEvent, TResult, TErr, TContext>
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35 | onError?: MiddlewareFn<TEvent, TResult, TErr>
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36 | }
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37 |
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38 | type MiddyInputHandler<TEvent, TResult, TContext> = (event: TEvent, context: TContext) => Promise<TResult>
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39 |
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40 | export interface MiddyfiedHandler<TEvent = any, TResult = any, TErr = Error, TContext extends LambdaContext = any> extends MiddyInputHandler<TEvent, TResult, TContext> {
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41 | use: UseFn<TEvent, TResult, TErr, TContext>
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42 | applyMiddleware: AttachMiddlewareObj<TEvent, TResult, TErr, TContext>
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43 | before: AttachMiddlewareFn<TEvent, TResult, TErr, TContext>
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44 | after: AttachMiddlewareFn<TEvent, TResult, TErr, TContext>
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45 | onError: AttachMiddlewareFn<TEvent, TResult, TErr, TContext>
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46 | __middlewares: {
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47 | before: Array<MiddlewareFn<TEvent, TResult, TErr, TContext>>
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48 | after: Array<MiddlewareFn<TEvent, TResult, TErr, TContext>>
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49 | onError: Array<MiddlewareFn<TEvent, TResult, TErr, TContext>>
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50 | }
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51 | (event: TEvent, context: TContext): Promise<TResult>
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52 | }
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53 |
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54 | declare type AttachMiddlewareFn<TEvent = any, TResult = any, TErr = Error, TContext extends LambdaContext = any> = (middleware: MiddlewareFn) => MiddyfiedHandler<TEvent, TResult, TErr, TContext>
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55 |
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56 | declare type AttachMiddlewareObj<TEvent = any, TResult = any, TErr = Error, TContext extends LambdaContext = any> = (middleware: MiddlewareObj) => MiddyfiedHandler<TEvent, TResult, TErr, TContext>
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57 |
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58 | declare type UseFn<TEvent = any, TResult = any, TErr = Error, TContext extends LambdaContext = any> =
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59 | (middlewares: MiddlewareObj<TEvent, TResult, TErr, TContext> | Array<MiddlewareObj<TEvent, TResult, TErr, TContext>>) => MiddyfiedHandler<TEvent, TResult, TErr, TContext>
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60 |
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61 | declare type MiddlewareHandler<THandler extends LambdaHandler<any, any>, TContext> =
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62 | THandler extends LambdaHandler<infer TEvent, infer TResult>
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63 | ? (event: TEvent, context: TContext) => Promise<TResult>
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64 | : never
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65 |
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66 |
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67 |
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68 |
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69 |
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70 |
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71 | declare function middy<TEvent = any, TResult = any, TErr = Error, TContext extends LambdaContext = any> (handler?: MiddlewareHandler<LambdaHandler<TEvent, TResult>, TContext>, plugin?: PluginObject): MiddyfiedHandler<TEvent, TResult, TErr, TContext>
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72 |
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73 | declare namespace middy {
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74 | export {
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75 | Request,
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76 | PluginHook,
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77 | PluginHookWithMiddlewareName,
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78 | PluginObject,
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79 | MiddlewareFn,
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80 | MiddlewareObj,
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81 | MiddyfiedHandler
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82 | }
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83 | }
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84 |
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85 | export default middy
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