Add the minimal golang web application to login users

Most of the code comes from Numerus, except that i replaced the router
with a simpler chain of handlers that i already used with some success
in other projects that feels a little cleaner.
This commit is contained in:
jordi fita mas 2023-06-04 23:58:10 +02:00
parent 6d0a282307
commit 20c7b7ad5f
20 changed files with 1257 additions and 1 deletions

12
.idea/dataSources.xml Normal file
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<?xml version="1.0" encoding="UTF-8"?>
<project version="4">
<component name="DataSourceManagerImpl" format="xml" multifile-model="true">
<data-source source="LOCAL" name="tipus@localhost" uuid="f4f01e13-e150-41a5-ac76-faf86346280d">
<driver-ref>postgresql</driver-ref>
<synchronize>true</synchronize>
<jdbc-driver>org.postgresql.Driver</jdbc-driver>
<jdbc-url>jdbc:postgresql://localhost:5432/tipus</jdbc-url>
<working-dir>$ProjectFileDir$</working-dir>
</data-source>
</component>
</project>

6
.idea/sqldialects.xml Normal file
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<?xml version="1.0" encoding="UTF-8"?>
<project version="4">
<component name="SqlDialectMappings">
<file url="PROJECT" dialect="PostgreSQL" />
</component>
</project>

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@ -1,8 +1,11 @@
<?xml version="1.0" encoding="UTF-8"?>
<module type="JAVA_MODULE" version="4">
<component name="Go" enabled="true" />
<component name="NewModuleRootManager" inherit-compiler-output="true">
<exclude-output />
<content url="file://$MODULE_DIR$" />
<content url="file://$MODULE_DIR$">
<sourceFolder url="file://$MODULE_DIR$/web" type="java-resource" />
</content>
<orderEntry type="inheritedJdk" />
<orderEntry type="sourceFolder" forTests="false" />
</component>

50
cmd/tipus/main.go Normal file
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/**
* SPDX-FileCopyrightText: 2023 jordi fita mas <jordi@tandem.blog>
* SPDX-License-Identifier: GPL-3.0-only
*/
package main
import (
"context"
"log"
"net/http"
"os"
"os/signal"
"syscall"
"time"
tipus "dev.tandem.ws/tandem/tipus/pkg"
)
func main() {
db, err := tipus.NewDatabase(context.Background(), os.Getenv("TIPUS_DATABASE_URL"))
if err != nil {
log.Fatal(err)
}
defer db.Close()
srv := &http.Server{
Addr: ":8080",
Handler: tipus.NewApplication(db),
ReadTimeout: 5 * time.Second,
WriteTimeout: 10 * time.Second,
IdleTimeout: 2 * time.Minute,
}
go func() {
log.Printf("INFO — listening on %s\n", srv.Addr)
if err := srv.ListenAndServe(); err != http.ErrServerClosed {
log.Fatalf("ERROR — http server: %s\n", err)
}
}()
sigCh := make(chan os.Signal, 1)
signal.Notify(sigCh, syscall.SIGINT, syscall.SIGTERM)
<-sigCh
ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
defer cancel()
log.Print("INFO - stopping server")
if err := srv.Shutdown(ctx); err != nil {
log.Fatal(err)
}
}

9
go.mod Normal file
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module dev.tandem.ws/tandem/tipus
go 1.16
require (
github.com/jackc/pgx/v4 v4.18.1
github.com/leonelquinteros/gotext v1.5.2
golang.org/x/text v0.7.0
)

204
go.sum Normal file
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@ -0,0 +1,204 @@
github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
github.com/Masterminds/semver/v3 v3.1.1/go.mod h1:VPu/7SZ7ePZ3QOrcuXROw5FAcLl4a0cBrbBpGY/8hQs=
github.com/cockroachdb/apd v1.1.0 h1:3LFP3629v+1aKXU5Q37mxmRxX/pIu1nijXydLShEq5I=
github.com/cockroachdb/apd v1.1.0/go.mod h1:8Sl8LxpKi29FqWXR16WEFZRNSz3SoPzUzeMeY4+DwBQ=
github.com/coreos/go-systemd v0.0.0-20190321100706-95778dfbb74e/go.mod h1:F5haX7vjVVG0kc13fIWeqUViNPyEJxv/OmvnBo0Yme4=
github.com/coreos/go-systemd v0.0.0-20190719114852-fd7a80b32e1f/go.mod h1:F5haX7vjVVG0kc13fIWeqUViNPyEJxv/OmvnBo0Yme4=
github.com/creack/pty v1.1.7/go.mod h1:lj5s0c3V2DBrqTV7llrYr5NG6My20zk30Fl46Y7DoTY=
github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/go-kit/log v0.1.0/go.mod h1:zbhenjAZHb184qTLMA9ZjW7ThYL0H2mk7Q6pNt4vbaY=
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github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
github.com/stretchr/testify v1.8.1 h1:w7B6lhMri9wdJUVmEZPGGhZzrYTPvgJArz7wNPgYKsk=
github.com/stretchr/testify v1.8.1/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
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 v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
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 v0.0.0-20210616213533-5ff15b29337e/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
golang.org/x/crypto v0.0.0-20210711020723-a769d52b0f97/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
golang.org/x/crypto v0.6.0 h1:qfktjS5LUO+fFKeJXZ+ikTRijMmljikvG68fpMMruSc=
golang.org/x/crypto v0.6.0/go.mod h1:OFC/31mSvZgRz0V1QTNCzfAI1aIRzbiufJtkMIlEp58=
golang.org/x/lint v0.0.0-20190930215403-16217165b5de/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
golang.org/x/mod v0.0.0-20190513183733-4bf6d317e70e/go.mod h1:mXi4GBBbnImb6dmsKGUJ2LatrhH/nqhxcFungHvyanc=
golang.org/x/mod v0.1.1-0.20191105210325-c90efee705ee/go.mod h1:QqPTAvyqsEbceGzBzNggFXnrqF1CaUcvgkdR5Ot7KZg=
golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4/go.mod h1:jJ57K6gSWd91VN4djpZkiMVwK6gcyfeH4XE8wZrZaV4=
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/net v0.0.0-20220722155237-a158d28d115b/go.mod h1:XRhObCWvk6IyKnWLug+ECip1KBveYUHfp+8e9klMJ9c=
golang.org/x/net v0.6.0/go.mod h1:2Tu9+aMcznHK/AK1HMvgo6xiTLG5rD5rZLDS+rp2Bjs=
golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/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=
golang.org/x/sys v0.0.0-20190222072716-a9d3bda3a223/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/sys v0.0.0-20190403152447-81d4e9dc473e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20190422165155-953cdadca894/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20190813064441-fde4db37ae7a/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20191026070338-33540a1f6037/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20200116001909-b77594299b42/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20200223170610-d5e6a3e2c0ae/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.5.0/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/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
golang.org/x/term v0.5.0/go.mod h1:jMB1sMXY+tzblOD4FWmEbocvup2/aLOaQEp7JmGp78k=
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 v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
golang.org/x/text v0.3.8/go.mod h1:E6s5w1FMmriuDzIBO73fBruAKo1PCIq6d2Q6DHfQ8WQ=
golang.org/x/text v0.7.0 h1:4BRB4x83lYWy72KwLD/qYDuTu7q9PjSagHvijDw7cLo=
golang.org/x/text v0.7.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
golang.org/x/tools v0.0.0-20190311212946-11955173bddd/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
golang.org/x/tools v0.0.0-20190425163242-31fd60d6bfdc/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=
golang.org/x/tools v0.0.0-20190621195816-6e04913cbbac/go.mod h1:/rFqwRUd4F7ZHNgwSSTFct+R/Kf4OFW1sUzUTQQTgfc=
golang.org/x/tools v0.0.0-20190823170909-c4a336ef6a2f/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
golang.org/x/tools v0.0.0-20191029041327-9cc4af7d6b2c/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
golang.org/x/tools v0.0.0-20191029190741-b9c20aec41a5/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
golang.org/x/tools v0.0.0-20200103221440-774c71fcf114/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
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 v0.0.0-20200804184101-5ec99f83aff1/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.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=

64
pkg/application.go Normal file
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@ -0,0 +1,64 @@
package pkg
import (
"net/http"
"path"
"strings"
)
type ApplicationHandler struct {
db *Db
fileHandler http.Handler
loginHandler *LoginHandler
}
func NewApplication(db *Db) http.Handler {
var handler http.Handler = &ApplicationHandler{
db: db,
fileHandler: http.FileServer(http.Dir("web/static")),
loginHandler: &LoginHandler{},
}
handler = LocaleSetter(db, handler)
handler = LoginChecker(db, handler)
handler = Recoverer(handler)
handler = Logger(handler)
return handler
}
func (h *ApplicationHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
var head string
head, r.URL.Path = shiftPath(r.URL.Path)
switch head {
case "static":
h.fileHandler.ServeHTTP(w, r)
case "login":
h.loginHandler.ServeHTTP(w, r)
case "":
switch r.Method {
case http.MethodGet:
h.serveHomePage(w, r)
default:
methodNotAllowed(w, r, http.MethodGet)
}
default:
http.NotFound(w, r)
}
}
func (h *ApplicationHandler) serveHomePage(w http.ResponseWriter, r *http.Request) {
mustRenderWebTemplate(w, r, "home.gohtml", nil)
}
func shiftPath(p string) (head, tail string) {
p = path.Clean("/" + p)
if i := strings.IndexByte(p[1:], '/') + 1; i <= 0 {
return p[1:], "/"
} else {
return p[1:i], p[i:]
}
}
func methodNotAllowed(w http.ResponseWriter, _ *http.Request, allowed ...string) {
w.Header().Set("Allow", strings.Join(allowed, ", "))
http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
}

162
pkg/db.go Normal file
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@ -0,0 +1,162 @@
package pkg
import (
"context"
"log"
"github.com/jackc/pgx/v4"
"github.com/jackc/pgx/v4/pgxpool"
)
type Db struct {
*pgxpool.Pool
}
func NewDatabase(ctx context.Context, connString string) (*Db, error) {
config, err := pgxpool.ParseConfig(connString)
if err != nil {
log.Fatal(err)
}
config.AfterConnect = func(ctx context.Context, conn *pgx.Conn) error {
if _, err := conn.Exec(ctx, "SET search_path TO tipus, public"); err != nil {
return err
}
return nil
}
config.BeforeAcquire = func(ctx context.Context, conn *pgx.Conn) bool {
cookie := ""
if value, ok := ctx.Value(ContextCookieKey).(string); ok {
cookie = value
}
if _, err := conn.Exec(ctx, "select set_cookie($1)", cookie); err != nil {
log.Printf("ERROR - Failed to set role: %v", err)
return false
}
return true
}
config.AfterRelease = func(conn *pgx.Conn) bool {
if _, err := conn.Exec(context.Background(), "RESET ROLE"); err != nil {
log.Printf("ERROR - Failed to reset role: %v", err)
return false
}
return true
}
pool, err := pgxpool.ConnectConfig(ctx, config)
if err != nil {
return nil, err
}
return &Db{pool}, nil
}
func notFoundErrorOrPanic(err error) bool {
if err == pgx.ErrNoRows {
return true
}
if err != nil {
panic(err)
}
return false
}
func (db *Db) Acquire(ctx context.Context) (*Conn, error) {
conn, err := db.Pool.Acquire(ctx)
if err != nil {
return nil, err
}
return &Conn{conn}, nil
}
func (db *Db) MustAcquire(ctx context.Context) *Conn {
conn, err := db.Acquire(ctx)
if err != nil {
panic(err)
}
return conn
}
type Conn struct {
*pgxpool.Conn
}
func (c *Conn) MustBegin(ctx context.Context) *Tx {
tx, err := c.Begin(ctx)
if err != nil {
panic(err)
}
return &Tx{tx}
}
func (c *Conn) MustGetText(ctx context.Context, def string, sql string, args ...interface{}) string {
var result string
if notFoundErrorOrPanic(c.Conn.QueryRow(ctx, sql, args...).Scan(&result)) {
return def
}
return result
}
func (c *Conn) MustGetBool(ctx context.Context, sql string, args ...interface{}) bool {
var result bool
if err := c.Conn.QueryRow(ctx, sql, args...).Scan(&result); err != nil {
panic(err)
}
return result
}
func (c *Conn) MustExec(ctx context.Context, sql string, args ...interface{}) {
if _, err := c.Conn.Exec(ctx, sql, args...); err != nil {
panic(err)
}
}
func (c *Conn) MustQuery(ctx context.Context, sql string, args ...interface{}) pgx.Rows {
rows, err := c.Conn.Query(ctx, sql, args...)
if err != nil {
panic(err)
}
return rows
}
type Tx struct {
pgx.Tx
}
func (tx *Tx) MustCommit(ctx context.Context) {
if err := tx.Commit(ctx); err != nil {
panic(err)
}
}
func (tx *Tx) MustRollback(ctx context.Context) {
if err := tx.Rollback(ctx); err != nil {
panic(err)
}
}
func (tx *Tx) MustGetInteger(ctx context.Context, sql string, args ...interface{}) int {
var result int
if err := tx.QueryRow(ctx, sql, args...).Scan(&result); err != nil {
panic(err)
}
return result
}
func (tx *Tx) MustGetIntegerOrDefault(ctx context.Context, def int, sql string, args ...interface{}) int {
var result int
if notFoundErrorOrPanic(tx.QueryRow(ctx, sql, args...).Scan(&result)) {
return def
}
return result
}
func (tx *Tx) MustCopyFrom(ctx context.Context, tableName string, columns []string, rows [][]interface{}) int64 {
copied, err := tx.CopyFrom(ctx, pgx.Identifier{tableName}, columns, pgx.CopyFromRows(rows))
if err != nil {
panic(err)
}
return copied
}

83
pkg/form/input_field.go Normal file
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@ -0,0 +1,83 @@
package form
import (
"database/sql/driver"
"fmt"
"html/template"
"net/http"
"strconv"
"strings"
"time"
)
type Attribute struct {
Key, Val string
}
type InputField struct {
Name string
Label string
Type string
Val string
Is string
Required bool
Attributes []template.HTMLAttr
Errors []error
}
func (field *InputField) Scan(value interface{}) error {
if value == nil {
field.Val = ""
return nil
}
switch v := value.(type) {
case time.Time:
if field.Type == "date" {
field.Val = v.Format("2006-01-02")
} else if field.Type == "time" {
field.Val = v.Format("15:04")
} else {
field.Val = v.Format(time.RFC3339)
}
default:
field.Val = fmt.Sprintf("%v", v)
}
return nil
}
func (field *InputField) Value() (driver.Value, error) {
return field.Val, nil
}
func (field *InputField) FillValue(r *http.Request) {
field.Val = strings.TrimSpace(r.FormValue(field.Name))
}
func (field *InputField) Integer() int {
value, err := strconv.Atoi(field.Val)
if err != nil {
panic(err)
}
return value
}
func (field *InputField) IntegerOrNil() interface{} {
if field.Val != "" {
if i := field.Integer(); i > 0 {
return i
}
}
return nil
}
func (field *InputField) Float64() float64 {
value, err := strconv.ParseFloat(field.Val, 64)
if err != nil {
panic(err)
}
return value
}
func (field *InputField) String() string {
return field.Val
}

66
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package form
import (
"errors"
"net/mail"
"net/url"
"strconv"
"time"
)
type Validator struct {
Valid bool
}
func NewValidator() *Validator {
return &Validator{true}
}
func (v *Validator) AllOK() bool {
return v.Valid
}
func (v *Validator) CheckRequiredInput(field *InputField, message string) bool {
return v.checkInput(field, field.Val != "", message)
}
func (v *Validator) CheckInputMinLength(field *InputField, min int, message string) bool {
return v.checkInput(field, len(field.Val) >= min, message)
}
func (v *Validator) CheckValidEmailInput(field *InputField, message string) bool {
_, err := mail.ParseAddress(field.Val)
return v.checkInput(field, err == nil, message)
}
func (v *Validator) CheckPasswordConfirmation(password *InputField, confirm *InputField, message string) bool {
return v.checkInput(confirm, password.Val == confirm.Val, message)
}
func (v *Validator) CheckValidURL(field *InputField, message string) bool {
_, err := url.ParseRequestURI(field.Val)
return v.checkInput(field, err == nil, message)
}
func (v *Validator) CheckValidDate(field *InputField, message string) bool {
_, err := time.Parse("2006-01-02", field.Val)
return v.checkInput(field, err == nil, message)
}
func (v *Validator) CheckValidInteger(field *InputField, min int, max int, message string) bool {
value, err := strconv.Atoi(field.Val)
return v.checkInput(field, err == nil && value >= min && value <= max, message)
}
func (v *Validator) CheckValidDecimal(field *InputField, min float64, max float64, message string) bool {
value, err := strconv.ParseFloat(field.Val, 64)
return v.checkInput(field, err == nil && value >= min && value <= max, message)
}
func (v *Validator) checkInput(field *InputField, ok bool, message string) bool {
if !ok {
field.Errors = append(field.Errors, errors.New(message))
v.Valid = false
}
return ok
}

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pkg/locale.go Normal file
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package pkg
import (
"context"
"net/http"
"github.com/leonelquinteros/gotext"
"golang.org/x/text/language"
)
const contextLocaleKey = "tipus-locale"
type Locale struct {
*gotext.Locale
CurrencyPattern string
Language language.Tag
}
func NewLocale(lang availableLanguage) *Locale {
return &Locale{
gotext.NewLocale("locales", lang.tag.String()),
lang.currencyPattern,
lang.tag,
}
}
func LocaleSetter(db *Db, next http.Handler) http.Handler {
availableLanguages := mustGetAvailableLanguages(db)
locales := map[language.Tag]*Locale{}
var tags []language.Tag
for _, lang := range availableLanguages {
locale := NewLocale(lang)
locale.AddDomain("tipus")
locales[lang.tag] = locale
tags = append(tags, lang.tag)
}
defaultLocale := locales[language.Catalan]
var matcher = language.NewMatcher(tags)
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
var locale *Locale
user := getUser(r)
locale = locales[user.Language]
if locale == nil {
t, _, err := language.ParseAcceptLanguage(r.Header.Get("Accept-Language"))
if err == nil {
tag, _, _ := matcher.Match(t...)
var ok bool
locale, ok = locales[tag]
for !ok && !tag.IsRoot() {
tag = tag.Parent()
locale, ok = locales[tag]
}
}
}
if locale == nil {
locale = defaultLocale
}
ctx := context.WithValue(r.Context(), contextLocaleKey, locale)
next.ServeHTTP(w, r.WithContext(ctx))
})
}
func getLocale(r *http.Request) *Locale {
return r.Context().Value(contextLocaleKey).(*Locale)
}
func pgettext(context string, str string, locale *Locale) string {
return locale.GetC(str, context)
}
func gettext(str string, locale *Locale) string {
return locale.Get(str)
}
type availableLanguage struct {
tag language.Tag
currencyPattern string
}
func mustGetAvailableLanguages(db *Db) []availableLanguage {
rows, err := db.Query(context.Background(), "select lang_tag, currency_pattern from language where selectable")
if err != nil {
panic(err)
}
defer rows.Close()
var langs []availableLanguage
for rows.Next() {
var langTag string
var currencyPattern string
err = rows.Scan(&langTag, &currencyPattern)
if err != nil {
panic(err)
}
langs = append(langs, availableLanguage{language.MustParse(langTag), currencyPattern})
}
if rows.Err() != nil {
panic(rows.Err())
}
return langs
}

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pkg/logger.go Normal file
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package pkg
import (
"log"
"net/http"
"time"
)
type loggerResponseWriter struct {
http.ResponseWriter
statusCode int
responseSize int
}
func (w *loggerResponseWriter) WriteHeader(statusCode int) {
w.statusCode = statusCode
w.ResponseWriter.WriteHeader(statusCode)
}
func (w *loggerResponseWriter) Write(b []byte) (int, error) {
w.responseSize += len(b)
return w.ResponseWriter.Write(b)
}
func (w *loggerResponseWriter) Flush() {
if f, ok := w.ResponseWriter.(http.Flusher); ok {
f.Flush()
}
}
func Logger(handler http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
t := time.Now()
logger := loggerResponseWriter{w, 0, 0}
handler.ServeHTTP(&logger, r)
statusCode := logger.statusCode
if statusCode == 0 {
statusCode = http.StatusOK
}
referer := r.Referer()
if referer == "" {
referer = "-"
}
log.Printf("HTTP - %s - - [%s] \"%s %s %s\" %d %d \"%s\" \"%s\" %s\n",
r.RemoteAddr,
t.Format("02/Jan/2006:15:04:05 -0700"),
r.Method,
r.URL.Path,
r.Proto,
statusCode,
logger.responseSize,
referer,
r.UserAgent(),
time.Since(t),
)
})
}

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pkg/login.go Normal file
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package pkg
import (
"context"
"errors"
"html/template"
"net"
"net/http"
"time"
"dev.tandem.ws/tandem/tipus/pkg/form"
"golang.org/x/text/language"
)
const (
ContextUserKey = "tipus-user"
ContextCookieKey = "tipus-cookie"
ContextConnKey = "tipus-database"
sessionCookie = "tipus-session"
defaultRole = "guest"
csrfTokenField = "csfrToken"
)
type loginForm struct {
locale *Locale
Errors []error
Email *form.InputField
Password *form.InputField
}
func newLoginForm(locale *Locale) *loginForm {
return &loginForm{
locale: locale,
Email: &form.InputField{
Name: "email",
Label: pgettext("input", "Email", locale),
Type: "email",
Required: true,
Attributes: []template.HTMLAttr{
`autofocus="autofocus"`,
`autocomplete="username"`,
`autocapitalize="none"`,
},
},
Password: &form.InputField{
Name: "password",
Label: pgettext("input", "Password", locale),
Type: "password",
Required: true,
Attributes: []template.HTMLAttr{
`autocomplete="current-password"`,
},
},
}
}
func (f *loginForm) Parse(r *http.Request) error {
err := r.ParseForm()
if err != nil {
return err
}
f.Email.FillValue(r)
f.Password.FillValue(r)
return nil
}
func (f *loginForm) Validate() bool {
validator := form.NewValidator()
if validator.CheckRequiredInput(f.Email, gettext("Email can not be empty.", f.locale)) {
validator.CheckValidEmailInput(f.Email, gettext("This value is not a valid email. It should be like name@domain.com.", f.locale))
}
validator.CheckRequiredInput(f.Password, gettext("Password can not be empty.", f.locale))
return validator.AllOK()
}
func (f *loginForm) mustRender(w http.ResponseWriter, r *http.Request) {
mustRenderWebTemplate(w, r, "login.gohtml", f)
}
type LoginHandler struct {
}
func (h *LoginHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
var head string
head, r.URL.Path = shiftPath(r.URL.Path)
switch head {
case "":
switch r.Method {
case http.MethodGet:
h.serveLoginForm(w, r)
case http.MethodPost:
h.handleLogin(w, r)
default:
methodNotAllowed(w, r, http.MethodGet, http.MethodPost)
}
default:
http.NotFound(w, r)
}
}
func (h *LoginHandler) serveLoginForm(w http.ResponseWriter, r *http.Request) {
user := getUser(r)
if user.LoggedIn {
http.Redirect(w, r, "/", http.StatusSeeOther)
return
}
locale := getLocale(r)
login := newLoginForm(locale)
w.WriteHeader(http.StatusOK)
login.mustRender(w, r)
}
func (h *LoginHandler) handleLogin(w http.ResponseWriter, r *http.Request) {
user := getUser(r)
if user.LoggedIn {
http.Redirect(w, r, "/", http.StatusSeeOther)
return
}
locale := getLocale(r)
login := newLoginForm(locale)
if err := login.Parse(r); err != nil {
http.Error(w, err.Error(), http.StatusBadRequest)
return
}
if login.Validate() {
conn := getConn(r)
cookie := conn.MustGetText(r.Context(), "", "select login($1, $2, $3)", login.Email, login.Password, remoteAddr(r))
if cookie != "" {
setSessionCookie(w, cookie)
http.Redirect(w, r, "/", http.StatusSeeOther)
return
}
login.Errors = append(login.Errors, errors.New(gettext("Invalid user or password.", locale)))
w.WriteHeader(http.StatusUnauthorized)
} else {
w.WriteHeader(http.StatusUnprocessableEntity)
}
login.mustRender(w, r)
}
func remoteAddr(r *http.Request) string {
address := r.Header.Get("X-Forwarded-For")
if address == "" {
address, _, _ = net.SplitHostPort(r.RemoteAddr)
}
return address
}
func setSessionCookie(w http.ResponseWriter, cookie string) {
http.SetCookie(w, createSessionCookie(cookie, 8766*24*time.Hour))
}
func createSessionCookie(value string, duration time.Duration) *http.Cookie {
return &http.Cookie{
Name: sessionCookie,
Value: value,
Path: "/",
Expires: time.Now().Add(duration),
HttpOnly: true,
SameSite: http.SameSiteLaxMode,
}
}
type AppUser struct {
Email string
LoggedIn bool
Role string
Language language.Tag
CsrfToken string
}
func LoginChecker(db *Db, next http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
var ctx = r.Context()
if cookie, err := r.Cookie(sessionCookie); err == nil {
ctx = context.WithValue(ctx, ContextCookieKey, cookie.Value)
}
conn := db.MustAcquire(ctx)
defer conn.Release()
ctx = context.WithValue(ctx, ContextConnKey, conn)
user := &AppUser{
Email: "",
LoggedIn: false,
Role: defaultRole,
}
row := conn.QueryRow(ctx, "select coalesce(email, ''), role, lang_tag, csrf_token from user_profile")
var langTag string
if err := row.Scan(&user.Email, &user.Role, &langTag, &user.CsrfToken); err != nil {
panic(err)
}
user.LoggedIn = user.Email != ""
user.Language, _ = language.Parse(langTag)
ctx = context.WithValue(ctx, ContextUserKey, user)
next.ServeHTTP(w, r.WithContext(ctx))
})
}
func getUser(r *http.Request) *AppUser {
return r.Context().Value(ContextUserKey).(*AppUser)
}
func getConn(r *http.Request) *Conn {
return r.Context().Value(ContextConnKey).(*Conn)
}

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pkg/recover.go Normal file
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package pkg
import (
"fmt"
"log"
"net/http"
"runtime"
)
func Recoverer(next http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
defer func() {
if r := recover(); r != nil {
if r == http.ErrAbortHandler {
panic(r)
}
err, ok := r.(error)
if !ok {
err = fmt.Errorf("%v", r)
}
stack := make([]byte, 4<<10)
length := runtime.Stack(stack, true)
log.Printf("PANIC - %v %s", err, stack[:length])
http.Error(w, err.Error(), http.StatusInternalServerError)
}
}()
next.ServeHTTP(w, r)
})
}

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pkg/template.go Normal file
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package pkg
import (
"fmt"
"html/template"
"io"
"net/http"
)
func templateFile(name string) string {
return "web/template/" + name
}
func mustRenderTemplate(wr io.Writer, r *http.Request, layout string, filename string, data interface{}) {
locale := getLocale(r)
user := getUser(r)
t := template.New(filename)
t.Funcs(template.FuncMap{
"gettext": locale.Get,
"pgettext": locale.GetC,
"currentLocale": func() string {
return locale.Language.String()
},
"csrfToken": func() template.HTML {
return template.HTML(fmt.Sprintf(`<input type="hidden" name="%s" value="%s">`, csrfTokenField, user.CsrfToken))
},
})
if _, err := t.ParseFiles(templateFile(filename), templateFile(layout), templateFile("form.gohtml")); err != nil {
panic(err)
}
if w, ok := wr.(http.ResponseWriter); ok {
w.Header().Set("Content-Type", "text/html; charset=utf-8")
}
if err := t.ExecuteTemplate(wr, layout, data); err != nil {
panic(err)
}
}
func mustRenderWebTemplate(w io.Writer, r *http.Request, filename string, data interface{}) {
mustRenderTemplate(w, r, "web.gohtml", filename, data)
}

93
web/static/tipus.css Normal file
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*, *::before, *::after {
box-sizing: border-box;
}
* {
margin: 0;
}
:root {
--tipus--color--black: #3f3b37;
--tipus--color--dark-gray: #8a8885;
--tipus--color--light-gray: #e1dbd6;
--tipus--color--white: #ffffff;
--tipus--color--yellow: #ffd200;
--tipus--color--red: #ff7a53;
--tipus--color--rosy: #ffbaa6;
--tipus--color--green: #5ae487;
--tipus--color--light-green: #9fefb9;
--tipus--color--blue: #55bfff;
--tipus--color--light-blue: #cbebff;
--tipus--color--hay: #ffe673;
--tipus--text-color: var(--tipus--color--black);
--tipus--background-color: var(--tipus--color--white);
--tipus--font-family: 'JetBrains Mono';
}
html, body {
height: 100%;
}
html {
font-family: var(--tipus--font-family), monospace;
font-size: 62.5%;
}
body {
font-size: 1.6rem;
line-height: 1.5;
-webkit-font-smoothing: antialiased;
}
body, dialog {
background-color: var(--tipus--background-color);
color: var(--tipus--text-color);
}
img, picture, video, canvas, svg {
display: block;
max-width: 100%;
}
input, button, textarea, select {
font: inherit;
}
p, h1, h2, h3, h4, h5, h6 {
overflow-wrap: break-word;
}
input[type="submit"], button, .button {
min-width: 34rem;
background-color: var(--tipus--color--white);
border: 2px solid var(--tipus--color--black);
text-transform: uppercase;
display: inline-block;
text-align: center;
padding: 1rem;
}
input[type="submit"]:hover, button:hover {
background-color: var(--tipus--color--light-gray);
}
input[type="submit"]:active, button:active {
background-color: var(--tipus--color--black);
border-color: var(--tipus--color--white);
color: var(--tipus--color--white);
}
#login {
background-color: var(--tipus--color--hay);
padding: 1.25em;
}
#login h2 {
margin-bottom: 1em;
}
div[role="alert"].error {
padding: 1.25em;
background-color: var(--tipus--color--red);
}

23
web/template/form.gohtml Normal file
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{{ define "input-field" -}}
{{- /*gotype: dev.tandem.ws/tandem/tipus/pkg/form.InputField*/ -}}
<div class="input{{ if .Errors }} has-errors{{ end }}"{{ if .Is }} is="{{ .Is }}"{{ end }}>
{{ if eq .Type "textarea" }}
<textarea name="{{ .Name }}" id="{{ .Name }}-field"
{{- range $attribute := .Attributes }} {{$attribute}} {{ end }}
{{ if .Required }}required="required"{{ end }} placeholder="{{ .Label }}"
>{{ .Val }}</textarea>
{{ else }}
<input type="{{ .Type }}" name="{{ .Name }}" id="{{ .Name }}-field"
{{- range $attribute := .Attributes }} {{$attribute}} {{ end }}
{{ if .Required }}required="required"{{ end }} value="{{ .Val }}" placeholder="{{ .Label }}">
{{ end }}
<label for="{{ .Name }}-field">{{ .Label }}</label>
{{- if .Errors }}
<ul>
{{- range $error := .Errors }}
<li>{{ . }}</li>
{{- end }}
</ul>
{{- end }}
</div>
{{- end }}

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web/template/home.gohtml Normal file
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{{ define "title" -}}
{{( pgettext "Home" "title" )}}
{{- end }}
{{ define "content" -}}
{{- end }}

22
web/template/login.gohtml Normal file
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{{ define "title" -}}
{{( pgettext "Login" "title" )}}
{{- end }}
{{ define "content" -}}
{{- /*gotype: dev.tandem.ws/tandem/tipus/pkg.loginForm*/ -}}
{{ if .Errors -}}
<div class="error" role="alert">
{{ range .Errors -}}
<p>{{ . }}</p>
{{- end }}
</div>
{{- end }}
<section id="login">
<h2>{{( pgettext "Login" "title" )}}</h2>
<form method="POST" action="/login">
{{ template "input-field" .Email }}
{{ template "input-field" .Password }}
<button type="submit">{{( pgettext "Login" "action" )}}</button>
</form>
</section>
{{- end }}

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web/template/web.gohtml Normal file
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<!doctype html>
<html lang="{{ currentLocale }}">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>{{ template "title" . }} — Tipus</title>
<link rel="stylesheet" type="text/css" media="screen" href="/static/tipus.css">
</head>
<body class="web">
{{- template "content" . }}
</body>
</html>