Initial code - bare-bone endpoints for creating simple objects

This commit is contained in:
Piotr Biernat 2022-03-04 19:22:31 +01:00
commit bb358df4d5
18 changed files with 720 additions and 0 deletions

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.env.dist Normal file
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HTTP_PORT=8000
DATABASE_URL=postgres://username:password@host:port/db_name

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.gitignore vendored Normal file
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/.idea
.env
/vendor

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Makefile Normal file
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run:
go run cmd/server/main.go
race:
go run --race cmd/server/main.go
build:
go build cmd/server/main.go
test:
go test cmd/server/main.go
# run-profiler:
# go run cmd/server/main.go -cpuprofile cpu.prof -memprofile mem.prof
#
# profile-cpu-web:
# go tool pprof -http=127.0.0.1:9990 cpu.prof
#
# profile-mem-web:
# go tool pprof -http=127.0.0.1:9991 mem.prof

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README.md Normal file
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# rest-api-prototype
My simple Golang REST API prototype.

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cmd/server/main.go Normal file
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package main
import (
"context"
"log"
"net"
"os"
"os/signal"
"time"
"git.pbiernat.dev/golang/rest-api-prototype/internal/app"
"git.pbiernat.dev/golang/rest-api-prototype/internal/app/database"
"git.pbiernat.dev/golang/rest-api-prototype/internal/app/handler"
"github.com/joho/godotenv"
)
const ( // FIXME
defaultHTTPPort = "8080"
defaultDatabaseUrl = "postgres://postgres:12345678@127.0.0.1:5434/S7"
)
func main() {
err := godotenv.Load(".env")
if err != nil {
log.Fatalln("Error loading .env file")
}
httpAddr := net.JoinHostPort("127.0.0.1", getEnv("HTTP_PORT", defaultHTTPPort))
dbConnStr := getEnv("DATABASE_URL", defaultDatabaseUrl)
dbc, err := database.Connect(dbConnStr)
if err != nil {
log.Panicf("Unable to connect to database: %v\n", err)
}
env := &handler.Env{httpAddr, dbc}
srv := app.NewServer(env)
go srv.Start()
c := make(chan os.Signal, 1)
signal.Notify(c, os.Interrupt)
<-c
ctx, cancel := context.WithTimeout(context.Background(), time.Second*10)
defer cancel()
srv.Shutdown(ctx)
os.Exit(0)
}
func getEnv(name, defVal string) string {
env := os.Getenv(name)
if env == "" {
return defVal
}
return env
}

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go.mod Normal file
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module git.pbiernat.dev/golang/rest-api-prototype
go 1.17
require (
github.com/georgysavva/scany v0.3.0
github.com/gorilla/mux v1.8.0
github.com/jackc/pgx/v4 v4.15.0
github.com/joho/godotenv v1.4.0
)
require (
github.com/jackc/chunkreader/v2 v2.0.1 // indirect
github.com/jackc/pgconn v1.11.0 // indirect
github.com/jackc/pgio v1.0.0 // indirect
github.com/jackc/pgpassfile v1.0.0 // indirect
github.com/jackc/pgproto3/v2 v2.2.0 // indirect
github.com/jackc/pgservicefile v0.0.0-20200714003250-2b9c44734f2b // indirect
github.com/jackc/pgtype v1.10.0 // indirect
github.com/jackc/puddle v1.2.1 // indirect
github.com/pkg/errors v0.9.1 // indirect
golang.org/x/crypto v0.0.0-20210711020723-a769d52b0f97 // indirect
golang.org/x/text v0.3.6 // indirect
)

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go.sum Normal file
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github.com/cockroachdb/apd v1.1.0 h1:3LFP3629v+1aKXU5Q37mxmRxX/pIu1nijXydLShEq5I=
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github.com/cockroachdb/cockroach-go/v2 v2.2.0 h1:/5znzg5n373N/3ESjHF5SMLxiW4RKB05Ql//KWfeTFs=
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github.com/lib/pq v1.10.2 h1:AqzbZs4ZoCBp+GtejcpCpcxM3zlSMx29dXbUSeVtJb8=
github.com/lib/pq v1.10.2/go.mod h1:AlVN5x4E4T544tWzH6hKfbfQvm3HdbOxrmggDNAPY9o=
github.com/mattn/go-colorable v0.1.1/go.mod h1:FuOcm+DKB9mbwrcAfNl7/TZVBZ6rcnceauSikq3lYCQ=
github.com/mattn/go-colorable v0.1.2/go.mod h1:U0ppj6V5qS13XJ6of8GYAs25YV2eR4EVcfRqFIhoBtE=
github.com/mattn/go-colorable v0.1.6/go.mod h1:u6P/XSegPjTcexA+o6vUJrdnUu04hMope9wVRipJSqc=
github.com/mattn/go-isatty v0.0.5/go.mod h1:Iq45c/XA43vh69/j3iqttzPXn0bhXyGjM0Hdxcsrc5s=
github.com/mattn/go-isatty v0.0.7/go.mod h1:Iq45c/XA43vh69/j3iqttzPXn0bhXyGjM0Hdxcsrc5s=
github.com/mattn/go-isatty v0.0.8/go.mod h1:Iq45c/XA43vh69/j3iqttzPXn0bhXyGjM0Hdxcsrc5s=
github.com/mattn/go-isatty v0.0.9/go.mod h1:YNRxwqDuOph6SZLI9vUUz6OYw3QyUt7WiY2yME+cCiQ=
github.com/mattn/go-isatty v0.0.12/go.mod h1:cbi8OIDigv2wuxKPP5vlRcQ1OAZbq2CE4Kysco4FUpU=
github.com/mattn/go-sqlite3 v1.14.6/go.mod h1:NyWgC/yNuGj7Q9rpYnZvas74GogHl5/Z4A/KQRfk6bU=
github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
github.com/rogpeppe/go-internal v1.3.0/go.mod h1:M8bDsm7K2OlrFYOpmOWEs/qY81heoFRclV5y23lUDJ4=
github.com/rs/xid v1.2.1/go.mod h1:+uKXf+4Djp6Md1KODXJxgGQPKngRmWyn10oCKFzNHOQ=
github.com/rs/zerolog v1.13.0/go.mod h1:YbFCdg8HfsridGWAh22vktObvhZbQsZXe4/zB0OKkWU=
github.com/rs/zerolog v1.15.0/go.mod h1:xYTKnLHcpfU2225ny5qZjxnj9NvkumZYjJHlAThCjNc=
github.com/satori/go.uuid v1.2.0/go.mod h1:dA0hQrYB0VpLJoorglMZABFdXlWrHn1NEOzdhQKdks0=
github.com/shopspring/decimal v0.0.0-20180709203117-cd690d0c9e24/go.mod h1:M+9NzErvs504Cn4c5DxATwIqPbtswREoFCre64PpcG4=
github.com/shopspring/decimal v0.0.0-20200227202807-02e2044944cc/go.mod h1:DKyhrW/HYNuLGql+MJL6WCR6knT2jwCFRcu2hWCYk4o=
github.com/shopspring/decimal v1.2.0 h1:abSATXmQEYyShuxI4/vyW3tV1MrKAJzCZ/0zLUXYbsQ=
github.com/shopspring/decimal v1.2.0/go.mod h1:DKyhrW/HYNuLGql+MJL6WCR6knT2jwCFRcu2hWCYk4o=
github.com/sirupsen/logrus v1.4.1/go.mod h1:ni0Sbl8bgC9z8RoU9G6nDWqqs/fq4eDPysMBDgk/93Q=
github.com/sirupsen/logrus v1.4.2/go.mod h1:tLMulIdttU9McNUspp0xgXVQah82FyeX6MwdIuYE2rE=
github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
github.com/stretchr/objx v0.1.1/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
github.com/stretchr/objx v0.2.0 h1:Hbg2NidpLE8veEBkEZTL3CvlkUIVzuU9jDplZO54c48=
github.com/stretchr/objx v0.2.0/go.mod h1:qt09Ya8vawLte6SNmTgCsAVtYtaKzEcn8ATUoHMkEqE=
github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
github.com/stretchr/testify v1.5.1/go.mod h1:5W2xD1RspED5o8YsWQXVCued0rvSQ+mT+I5cxcmMvtA=
github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY=
github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
github.com/zenazn/goji v0.9.0/go.mod h1:7S9M489iMyHBNxwZnk9/EHS098H4/F6TATF2mIxtB1Q=
go.uber.org/atomic v1.3.2/go.mod h1:gD2HeocX3+yG+ygLZcrzQJaqmWj9AIm7n08wl/qW/PE=
go.uber.org/atomic v1.4.0/go.mod h1:gD2HeocX3+yG+ygLZcrzQJaqmWj9AIm7n08wl/qW/PE=
go.uber.org/atomic v1.5.0/go.mod h1:sABNBOSYdrvTF6hTgEIbc7YasKWGhgEQZyfxyTvoXHQ=
go.uber.org/atomic v1.6.0/go.mod h1:sABNBOSYdrvTF6hTgEIbc7YasKWGhgEQZyfxyTvoXHQ=
go.uber.org/multierr v1.1.0/go.mod h1:wR5kodmAFQ0UK8QlbwjlSNy0Z68gJhDJUG5sjR94q/0=
go.uber.org/multierr v1.3.0/go.mod h1:VgVr7evmIr6uPjLBxg28wmKNXyqE9akIJ5XnfpiKl+4=
go.uber.org/multierr v1.5.0/go.mod h1:FeouvMocqHpRaaGuG9EjoKcStLC43Zu/fmqdUMPcKYU=
go.uber.org/tools v0.0.0-20190618225709-2cfd321de3ee/go.mod h1:vJERXedbb3MVM5f9Ejo0C68/HhF8uaILCdgjnY+goOA=
go.uber.org/zap v1.9.1/go.mod h1:vwi/ZaCAaUcBkycHslxD9B2zi4UTXhF60s6SWpuDF0Q=
go.uber.org/zap v1.10.0/go.mod h1:vwi/ZaCAaUcBkycHslxD9B2zi4UTXhF60s6SWpuDF0Q=
go.uber.org/zap v1.13.0/go.mod h1:zwrFLgMcdUuIBviXEYEH1YKNaOBnKXsx2IPda5bBwHM=
golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
golang.org/x/crypto v0.0.0-20190411191339-88737f569e3a/go.mod h1:WFFai1msRO1wXaEeE5yQxYXgSfI8pQAWXbQop6sCtWE=
golang.org/x/crypto v0.0.0-20190510104115-cbcb75029529/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
golang.org/x/crypto v0.0.0-20190820162420-60c769a6c586/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
golang.org/x/crypto v0.0.0-20190911031432-227b76d455e7/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
golang.org/x/crypto v0.0.0-20200323165209-0ec3e9974c59/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
golang.org/x/crypto v0.0.0-20201203163018-be400aefbc4c/go.mod h1:jdWPYTVW3xRLrWPugEBEK3UY2ZEsg3UU495nc5E+M+I=
golang.org/x/crypto v0.0.0-20210322153248-0c34fe9e7dc2/go.mod h1:T9bdIzuCu7OtxOm1hfPfRQxPLYneinmdGuTeoZ9dtd4=
golang.org/x/crypto v0.0.0-20210616213533-5ff15b29337e/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
golang.org/x/crypto v0.0.0-20210711020723-a769d52b0f97 h1:/UOmuWzQfxxo9UtlXMwuQU8CMgg1eZXqTRwkSQJWKOI=
golang.org/x/crypto v0.0.0-20210711020723-a769d52b0f97/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
golang.org/x/lint v0.0.0-20190930215403-16217165b5de/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
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golang.org/x/mod v0.1.1-0.20191105210325-c90efee705ee/go.mod h1:QqPTAvyqsEbceGzBzNggFXnrqF1CaUcvgkdR5Ot7KZg=
golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
golang.org/x/net v0.0.0-20190813141303-74dc4d7220e7/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sys v0.0.0-20180905080454-ebe1bf3edb33/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
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golang.org/x/sys v0.0.0-20190403152447-81d4e9dc473e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
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golang.org/x/sys v0.0.0-20200116001909-b77594299b42/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
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golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
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golang.org/x/sys v0.0.0-20210823070655-63515b42dcdf h1:2ucpDCmfkl8Bd/FsLtiD653Wf96cW37s+iGx93zsu4k=
golang.org/x/sys v0.0.0-20210823070655-63515b42dcdf/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/term v0.0.0-20201117132131-f5c789dd3221/go.mod h1:Nr5EML6q2oocZ2LXRh80K7BxOlk5/8JxuGnuhpl+muw=
golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
golang.org/x/text v0.3.4/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
golang.org/x/text v0.3.5/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
golang.org/x/text v0.3.6 h1:aRYxNxv6iGQlyVaZmk6ZgYEDa+Jg18DxebPSrd6bg1M=
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golang.org/x/tools v0.0.0-20190311212946-11955173bddd/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
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golang.org/x/tools v0.0.0-20191029041327-9cc4af7d6b2c/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
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golang.org/x/tools v0.0.0-20200103221440-774c71fcf114/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
golang.org/x/xerrors v0.0.0-20190410155217-1f06c39b4373/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
golang.org/x/xerrors v0.0.0-20190513163551-3ee3066db522/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI=
gopkg.in/inconshreveable/log15.v2 v2.0.0-20180818164646-67afb5ed74ec/go.mod h1:aPpfJ7XW+gOuirDoZ8gHhLh3kZ1B08FtV2bbmy7Jv3s=
gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
gorm.io/driver/postgres v1.0.8/go.mod h1:4eOzrI1MUfm6ObJU/UcmbXyiHSs8jSwH95G5P5dxcAg=
gorm.io/gorm v1.20.12/go.mod h1:0HFTzE/SqkGTzK6TlDPPQbAYCluiVvhzoA1+aVyzenw=
gorm.io/gorm v1.21.4/go.mod h1:0HFTzE/SqkGTzK6TlDPPQbAYCluiVvhzoA1+aVyzenw=
honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=

View File

@ -0,0 +1,16 @@
package database
import (
"context"
"github.com/jackc/pgx/v4/pgxpool"
)
func Connect(connStr string) (*pgxpool.Pool, error) {
conn, err := pgxpool.Connect(context.Background(), connStr)
if err != nil {
return nil, err
}
return conn, nil
}

View File

@ -0,0 +1,15 @@
package entity
import (
"time"
)
type Article struct {
ID int `json:"id"`
CategoryID int `json:"category_id"`
Title string `json:"title"`
Intro string `json:"intro"`
Text string `json:"text"`
CreateDate time.Time `json:"create_date"`
ModifyDate time.Time `json:"modify_date"`
}

View File

@ -0,0 +1,12 @@
package entity
import (
"time"
)
type Category struct {
ID int
Name string
CreateDate time.Time
ModifyDate time.Time
}

View File

@ -0,0 +1,48 @@
package handler
import (
"net/http"
"time"
"git.pbiernat.dev/golang/rest-api-prototype/internal/app/entity"
)
var CreateArticleHandler *Handler
func init() {
CreateArticleHandler = &Handler{
Handle: CreateArticleHandlerFunc,
Request: &CreateArticleRequest{},
Response: &CreateArticleResponse{},
}
}
type CreateArticleRequest struct {
CategoryID int `json:"category_id"`
Title string `json:"title"`
Intro string `json:"intro"`
Text string `json:"text"`
}
type CreateArticleResponse struct {
Status string `json:"status"`
Data *entity.Article `json:"data"`
Err string `json:"err,omitempty"`
}
func CreateArticleHandlerFunc(env *Env, req interface{}, w http.ResponseWriter) (interface{}, error) {
// var art = req.(*CreateArticleRequest)
// doSthWith(art)
return &CreateArticleResponse{
Status: http.StatusText(http.StatusOK),
Data: &entity.Article{
ID: 1,
CategoryID: 1,
Title: "Dummy article",
Intro: "Intro",
Text: "Text",
CreateDate: time.Now(),
},
}, nil
}

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package handler
import (
"net/http"
"time"
"git.pbiernat.dev/golang/rest-api-prototype/internal/app/entity"
)
var CreateCategoryHandler *Handler
func init() {
CreateCategoryHandler = &Handler{
Handle: CreateCategoryHandlerFunc,
Request: &CreateCategoryRequest{},
Response: &CreateCategoryResponse{},
}
}
type CreateCategoryRequest struct {
Name string `json:"name"`
}
type CreateCategoryResponse struct {
Status string `json:"status"`
Data *entity.Category `json:"data"`
Err string `json:"err,omitempty"`
}
func CreateCategoryHandlerFunc(env *Env, req interface{}, w http.ResponseWriter) (interface{}, error) {
// var cat = req.(*CreateCategoryRequest)
// doSthWith(cat)
return &CreateCategoryResponse{
Status: http.StatusText(http.StatusOK),
Data: &entity.Category{
Name: "Dummy category",
CreateDate: time.Now(),
},
}, nil
}

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package handler
import "net/http"
type ErrorResponse struct {
Message string `json:"message"`
}
type NotFoundHandler struct{}
func (NotFoundHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(http.StatusNotFound)
encodeResponse(w, &ErrorResponse{Message: "Path " + r.RequestURI + " not found"}, nil)
}
type MethodNotAllowedHandler struct{}
func (MethodNotAllowedHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(http.StatusMethodNotAllowed)
encodeResponse(w, &ErrorResponse{Message: "Method Not Allowed: " + r.Method}, nil)
}

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package handler
import (
"bytes"
"encoding/json"
"io/ioutil"
"log"
"net/http"
"github.com/jackc/pgx/v4/pgxpool"
)
type Env struct {
Addr string
DB *pgxpool.Pool
}
type HandlerFunc func(e *Env, req interface{}, w http.ResponseWriter) (interface{}, error)
type Handler struct {
*Env
Handle HandlerFunc
Request interface{}
Response interface{}
}
func New(env *Env, h *Handler) *Handler {
return &Handler{env, h.Handle, h.Request, h.Response}
}
func (h Handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
if err := decodeRequestData(r, &h.Request); err != nil {
log.Println(err.Error())
}
res, err := h.Handle(h.Env, h.Request, w)
encodeResponse(w, res, err)
}
func decodeRequestData(r *http.Request, v interface{}) error {
buf, _ := ioutil.ReadAll(r.Body)
rdr := ioutil.NopCloser(bytes.NewReader(buf))
r.Body = ioutil.NopCloser(bytes.NewReader(buf))
if len(buf) == 0 {
// log.Println("empty request body1") //FIXME #1
return nil
}
if err := json.NewDecoder(rdr).Decode(&v); err != nil {
return err
}
return nil
}
func encodeResponse(w http.ResponseWriter, res interface{}, err error) {
if err != nil {
encodeError(w, err)
return
}
json.NewEncoder(w).Encode(res)
}
func encodeError(w http.ResponseWriter, e error) {
w.WriteHeader(http.StatusInternalServerError)
json.NewEncoder(w).Encode(map[string]interface{}{
"error": e.Error(),
})
}

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package handler
import (
"net/http"
)
var HealthCheckHandler *Handler
func init() {
HealthCheckHandler = &Handler{
Handle: HealthCheckHandlerFunc,
Request: &HealthCheckRequest{},
Response: &HealthCheckResponse{},
}
}
type HealthCheckRequest struct {
}
type HealthCheckResponse struct {
Status string `json:"status"`
Data *HealthCheckResponseBody `json:"data"`
}
type HealthCheckResponseBody struct {
Message string `json:"message,omitempty"`
}
func HealthCheckHandlerFunc(_ *Env, _ interface{}, w http.ResponseWriter) (interface{}, error) {
return &HealthCheckResponse{
Status: http.StatusText(http.StatusOK),
Data: &HealthCheckResponseBody{
Message: "This is welcome health message. Everything seems to be alright ;)",
},
}, nil
}

28
internal/app/router.go Normal file
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package app
import (
"net/http"
"git.pbiernat.dev/golang/rest-api-prototype/internal/app/handler"
"github.com/gorilla/mux"
)
func SetupRouter(env *handler.Env) *mux.Router {
r := mux.NewRouter()
r.NotFoundHandler = &handler.NotFoundHandler{}
r.MethodNotAllowedHandler = &handler.MethodNotAllowedHandler{}
r.Use(PrepareHeadersMiddleware)
r.Use(ValidateJsonBodyMiddleware) // probably not needed
r.Use(LoggingMiddleware)
hc := r.PathPrefix("/health").Subrouter()
hc.Handle("", handler.New(env, handler.HealthCheckHandler)).Methods(http.MethodGet)
api := r.PathPrefix("/api").Subrouter()
api.Handle("/article", handler.New(env, handler.CreateArticleHandler)).Methods(http.MethodPost)
api.Handle("/category", handler.New(env, handler.CreateCategoryHandler)).Methods(http.MethodPost)
return r
}

85
internal/app/server.go Normal file
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package app
import (
"bytes"
"encoding/json"
"io/ioutil"
"log"
"net/http"
"time"
"git.pbiernat.dev/golang/rest-api-prototype/internal/app/handler"
)
type Server struct {
*http.Server
}
func NewServer(env *handler.Env) *Server {
return &Server{
&http.Server{
Handler: SetupRouter(env),
Addr: env.Addr,
WriteTimeout: 15 * time.Second,
ReadTimeout: 15 * time.Second,
IdleTimeout: 60 * time.Second,
},
}
}
func (s *Server) Start() {
log.Println("Server listening on " + s.Addr)
if err := s.ListenAndServe(); err != nil {
log.Println(err)
}
}
func (s *Server) ExecuteHandler() {}
// func (s *Server) Shutdown(ctx context.Context) {
// log.Println("Shutting down...")
// if err := s.Shutdown(ctx); err != nil {
// log.Panicln(err)
// }
// }
func PrepareHeadersMiddleware(next http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "application/json; charset=utf-8")
w.Header().Set("Connection", "keep-alive")
w.Header().Set("Keep-Alive", "timeout=5")
next.ServeHTTP(w, r)
})
}
func ValidateJsonBodyMiddleware(next http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
buf, _ := ioutil.ReadAll(r.Body)
r.Body = ioutil.NopCloser(bytes.NewReader(buf)) // rollack *Request to original state
if len(buf) == 0 {
// log.Println("empty request body2") // FIXME #1
next.ServeHTTP(w, r)
return
}
if !json.Valid(buf) {
log.Println("Unable to parse JSON: ", string(buf))
w.WriteHeader(http.StatusInternalServerError)
return
}
next.ServeHTTP(w, r)
})
}
func LoggingMiddleware(next http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
log.Println("Request: " + r.RequestURI + " remote: " + r.RemoteAddr + " via: " + r.UserAgent())
next.ServeHTTP(w, r)
})
}

4
modd.conf Normal file
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# Exclude all test files of the form *_test.go
**/*.go !**/*_test.go {
daemon +sigterm: make run
}