Init

.gitignore

+.stack-work/
+*~
\ No newline at end of file

CHANGELOG.md

+# Changelog for `laipicMonitor`
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to the
+[Haskell Package Versioning Policy](https://pvp.haskell.org/).
+
+## Unreleased
+
+## 0.1.0.0 - YYYY-MM-DD

LICENSE

+Copyright Author name here (c) 2022
+
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+
+    * Redistributions in binary form must reproduce the above
+      copyright notice, this list of conditions and the following
+      disclaimer in the documentation and/or other materials provided
+      with the distribution.
+
+    * Neither the name of Author name here nor the names of other
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

README.md

+# laipicMonitor

Setup.hs

+import Distribution.Simple
+main = defaultMain

app/Main.hs

+module Main (main) where
+
+import Lib
+
+main :: IO ()
+main = someFunc

laipicMonitor.cabal

+cabal-version: 1.12
+
+-- This file has been generated from package.yaml by hpack version 0.35.0.
+--
+-- see: https://github.com/sol/hpack
+
+name:           laipicMonitor
+version:        0.1.0.0
+description:    Please see the README on GitHub at <https://github.com/githubuser/laipicMonitor#readme>
+homepage:       https://github.com/githubuser/laipicMonitor#readme
+bug-reports:    https://github.com/githubuser/laipicMonitor/issues
+author:         Author name here
+maintainer:     example@example.com
+copyright:      2022 Author name here
+license:        BSD3
+license-file:   LICENSE
+build-type:     Simple
+extra-source-files:
+    README.md
+    CHANGELOG.md
+
+source-repository head
+  type: git
+  location: https://github.com/githubuser/laipicMonitor
+
+library
+  exposed-modules:
+      Lib
+  other-modules:
+      Paths_laipicMonitor
+  hs-source-dirs:
+      src
+  ghc-options: -Wall -Wcompat -Widentities -Wincomplete-record-updates -Wincomplete-uni-patterns -Wmissing-export-lists -Wmissing-home-modules -Wpartial-fields -Wredundant-constraints
+  build-depends:
+      HTTP
+    , base >=4.7 && <5
+    , process
+    , time
+  default-language: Haskell2010
+
+executable laipicMonitor-exe
+  main-is: Main.hs
+  other-modules:
+      Paths_laipicMonitor
+  hs-source-dirs:
+      app
+  ghc-options: -Wall -Wcompat -Widentities -Wincomplete-record-updates -Wincomplete-uni-patterns -Wmissing-export-lists -Wmissing-home-modules -Wpartial-fields -Wredundant-constraints -threaded -rtsopts -with-rtsopts=-N
+  build-depends:
+      HTTP
+    , base >=4.7 && <5
+    , laipicMonitor
+    , process
+    , time
+  default-language: Haskell2010
+
+test-suite laipicMonitor-test
+  type: exitcode-stdio-1.0
+  main-is: Spec.hs
+  other-modules:
+      Paths_laipicMonitor
+  hs-source-dirs:
+      test
+  ghc-options: -Wall -Wcompat -Widentities -Wincomplete-record-updates -Wincomplete-uni-patterns -Wmissing-export-lists -Wmissing-home-modules -Wpartial-fields -Wredundant-constraints -threaded -rtsopts -with-rtsopts=-N
+  build-depends:
+      HTTP
+    , base >=4.7 && <5
+    , laipicMonitor
+    , process
+    , time
+  default-language: Haskell2010

package.yaml

+name:                laipicMonitor
+version:             0.1.0.0
+github:              "githubuser/laipicMonitor"
+license:             BSD3
+author:              "Author name here"
+maintainer:          "example@example.com"
+copyright:           "2022 Author name here"
+
+extra-source-files:
+- README.md
+- CHANGELOG.md
+
+# Metadata used when publishing your package
+# synopsis:            Short description of your package
+# category:            Web
+
+# To avoid duplicated efforts in documentation and dealing with the
+# complications of embedding Haddock markup inside cabal files, it is
+# common to point users to the README.md file.
+description:         Please see the README on GitHub at <https://github.com/githubuser/laipicMonitor#readme>
+
+dependencies:
+- base >= 4.7 && < 5
+- HTTP
+- process
+- time
+
+ghc-options:
+- -Wall
+- -Wcompat
+- -Widentities
+- -Wincomplete-record-updates
+- -Wincomplete-uni-patterns
+- -Wmissing-export-lists
+- -Wmissing-home-modules
+- -Wpartial-fields
+- -Wredundant-constraints
+
+library:
+  source-dirs: src
+
+executables:
+  laipicMonitor-exe:
+    main:                Main.hs
+    source-dirs:         app
+    ghc-options:
+    - -threaded
+    - -rtsopts
+    - -with-rtsopts=-N
+    dependencies:
+    - laipicMonitor
+
+tests:
+  laipicMonitor-test:
+    main:                Spec.hs
+    source-dirs:         test
+    ghc-options:
+    - -threaded
+    - -rtsopts
+    - -with-rtsopts=-N
+    dependencies:
+    - laipicMonitor

src/Lib.hs

+module Lib
+    ( someFunc
+    ) where
+
+import Data.Time.Clock
+    ( NominalDiffTime, UTCTime(UTCTime), diffUTCTime, getCurrentTime )
+import Data.Time.Calendar.OrdinalDate
+import Network.HTTP
+import System.Process
+import Control.Monad
+import Control.Exception
+import Control.Concurrent (threadDelay)
+import Network.HTTP.Stream (ConnError(ErrorMisc))
+
+webHook :: String
+webHook = "https://qyapi.weixin.qq.com/cgi-bin/webhook/send?key=2f209b18-4e9b-48db-ad46-3864e57e7d05"
+
+type WebHook = String
+type Msg = String
+
+data MonitorItem = MI {
+  url :: String,
+  status :: Bool,
+  lasttime :: UTCTime }
+
+hour :: NominalDiffTime
+hour = 3600
+
+defaultMI :: WebHook -> MonitorItem
+defaultMI wh =  MI wh True (UTCTime (fromOrdinalDate 0 0) 0)
+
+monitorUrls :: [MonitorItem]
+monitorUrls = [
+  defaultMI "http://69.234.216.199:5001/ppt2newdraft"
+  ]
+
+buildCMD :: WebHook -> Msg -> String
+buildCMD wh msg =
+  "curl " ++ wh ++
+  " -H 'Content-Type: application/json'"  ++
+  " -d '" ++
+  "{" ++
+  "\"msgtype\": \"text\"," ++
+  "\"text\": {" ++
+  "\"content\":" ++ "\"" ++ msg ++ "\"" ++
+  "}" ++
+  "}'"
+
+onFailure :: MonitorItem -> IO MonitorItem
+onFailure mi = do
+  needNotify <- notifyRequire
+  if needNotify then doNotify else return mi
+  where
+
+    notifyRequire :: IO Bool
+    notifyRequire = do
+      current <- getCurrentTime
+      let diffTime = diffUTCTime current (lasttime mi)
+
+      -- Check whether had already notified.
+      let resend = diffTime > 12 * hour
+      return (status mi || (not (status mi) && resend))
+
+    doNotify :: IO MonitorItem
+    doNotify = do
+      let cmd = buildCMD webHook ("Fail to access api " ++ url mi)
+      current <- getCurrentTime
+      -- FIXME: system may failed need to check it's return code
+      system cmd >> return (MI (url mi) False current)
+
+onSuccess :: MonitorItem -> IO MonitorItem
+onSuccess mi = do
+  current <- getCurrentTime
+
+  if not $ status mi
+    then do let cmd = buildCMD (url mi) ("Api has recovered: " ++ url mi)
+            system cmd >> return (MI (url mi) True current)
+    else return mi
+
+checkUrl :: MonitorItem -> IO MonitorItem
+checkUrl mi = do
+  result <- catch (simpleHTTP (getRequest $ url mi))
+                  (\e -> do let err = show (e :: IOException)
+                            return $ Left (ErrorMisc err))
+  case result of
+    Left _ -> onFailure mi
+    Right _ -> onSuccess mi
+
+monitoring :: [MonitorItem] -> IO ()
+monitoring mis = do
+  urlsStatus <- mapM checkUrl mis
+
+  -- Delay 30 secs
+  threadDelay 60000000
+
+  monitoring urlsStatus
+
+someFunc :: IO ()
+someFunc = monitoring monitorUrls

stack.yaml

+# This file was automatically generated by 'stack init'
+#
+# Some commonly used options have been documented as comments in this file.
+# For advanced use and comprehensive documentation of the format, please see:
+# https://docs.haskellstack.org/en/stable/yaml_configuration/
+
+# Resolver to choose a 'specific' stackage snapshot or a compiler version.
+# A snapshot resolver dictates the compiler version and the set of packages
+# to be used for project dependencies. For example:
+#
+# resolver: lts-3.5
+# resolver: nightly-2015-09-21
+# resolver: ghc-7.10.2
+#
+# The location of a snapshot can be provided as a file or url. Stack assumes
+# a snapshot provided as a file might change, whereas a url resource does not.
+#
+# resolver: ./custom-snapshot.yaml
+# resolver: https://example.com/snapshots/2018-01-01.yaml
+resolver:
+  url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/lts/19/31.yaml
+
+# User packages to be built.
+# Various formats can be used as shown in the example below.
+#
+# packages:
+# - some-directory
+# - https://example.com/foo/bar/baz-0.0.2.tar.gz
+#   subdirs:
+#   - auto-update
+#   - wai
+packages:
+- .
+# Dependency packages to be pulled from upstream that are not in the resolver.
+# These entries can reference officially published versions as well as
+# forks / in-progress versions pinned to a git hash. For example:
+#
+# extra-deps:
+# - acme-missiles-0.3
+# - git: https://github.com/commercialhaskell/stack.git
+#   commit: e7b331f14bcffb8367cd58fbfc8b40ec7642100a
+#
+extra-deps: ["Cabal-syntax-3.8.1.0@sha256:4936765e9a7a8ecbf8fdbe9067f6d972bc0299220063abb2632a9950af64b966,7619"]
+
+# Override default flag values for local packages and extra-deps
+# flags: {}
+
+# Extra package databases containing global packages
+# extra-package-dbs: []
+
+# Control whether we use the GHC we find on the path
+system-ghc: true
+#
+# Require a specific version of stack, using version ranges
+# require-stack-version: -any # Default
+# require-stack-version: ">=2.7"
+#
+# Override the architecture used by stack, especially useful on Windows
+# arch: i386
+# arch: x86_64
+#
+# Extra directories used by stack for building
+# extra-include-dirs: [/path/to/dir]
+# extra-lib-dirs: [/path/to/dir]
+#
+# Allow a newer minor version of GHC than the snapshot specifies
+# compiler-check: newer-minor

test/Spec.hs

+main :: IO ()
+main = putStrLn "Test suite not yet implemented"