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  1. 2
      .gitignore
  2. 674
      LICENSE
  3. 141
      Makefile
  4. 40
      README.md
  5. 24
      build/deb/usr/share/doc/horizon/copyright
  6. 191
      cmd/horizon.go
  7. 31
      docs/man/man1/horizon.1
  8. 65
      docs/man/man5/horizon-configs.5
  9. 29
      internal/logger/logger.go
  10. 208
      internal/settings/settings.go
  11. 138
      internal/settings/settings_test.go

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LICENSE
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GNU GENERAL PUBLIC LICENSE
Version 3, 29 June 2007
Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
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Also add information on how to contact you by electronic and paper mail.
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under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, your program's commands
might be different; for a GUI interface, you would use an "about box".
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
<https://www.gnu.org/licenses/>.
The GNU General Public License does not permit incorporating your program
into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<https://www.gnu.org/licenses/why-not-lgpl.html>.

141
Makefile
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NAME = horizon
VERSION ?= nil
SysConfigDir ?= /etc/horizon/
UserHomeEnvVar ?= HOME
UserConfigDir ?= .config/horizon/
GOOS ?= $(shell go env GOOS)
GOARCH ?= $(shell go env GOARCH)
LDFLAGS ?= -w -s
MAIN_GO = ./cmd/horizon.go
PREFIX ?= /usr/local
MAINTAINER ?= nil <nil>
DEB_BUILD_DIR := /tmp/$(shell head -c 100 /dev/urandom | base64 | sed 's/[+=/A-Z]//g' | tail -c 10)
.PHONY: all man configure test release install uninstall deb clean
all:
@if [ ! -f "internal/build/build.go" ]; then make configure; fi
mkdir -p dist/
go build -ldflags="$(LDFLAGS)" -o dist/$(NAME).$(GOOS).$(GOARCH) $(MAIN_GO)
chmod 755 dist/$(NAME).$(GOOS).$(GOARCH)
make man
man:
mkdir -p dist/man/man1/
gzip -9 --no-name --force -c docs/man/man1/horizon.1 > dist/man/man1/horizon.1.gz
mkdir -p dist/man/man5/
gzip -9 --no-name --force -c docs/man/man5/horizon-configs.5 > dist/man/man5/horizon-configs.5.gz
configure:
mkdir -p internal/build/
echo 'package build' > internal/build/build.go
echo '' >> internal/build/build.go
echo 'var Name = "$(NAME)"' >> internal/build/build.go
echo 'var Version = "$(VERSION)"' >> internal/build/build.go
echo 'var SysConfigDir = "$(SysConfigDir)"' >> internal/build/build.go
echo 'var UserHomeEnvVar = "$(UserHomeEnvVar)"' >> internal/build/build.go
echo 'var UserConfigDir = "$(UserConfigDir)"' >> internal/build/build.go
test:
@if [ ! -f "internal/build/build.go" ]; then make configure; fi
go test -v ./...
release:
@if [ ! -f "internal/build/build.go" ]; then make configure; fi
mkdir -p dist/
make man
tar --numeric-owner --owner=0 --group=0 --directory=dist/ -cf dist/man.tar man
GOOS=linux GOARCH=386 go build -ldflags="$(LDFLAGS)" -o dist/$(NAME).linux.386 $(MAIN_GO)
GOOS=linux GOARCH=amd64 go build -ldflags="$(LDFLAGS)" -o dist/$(NAME).linux.amd64 $(MAIN_GO)
GOOS=linux GOARCH=arm64 go build -ldflags="$(LDFLAGS)" -o dist/$(NAME).linux.arm64 $(MAIN_GO)
GOOS=linux GOARCH=386 DEBARCH=i386 VERSION=$(VERSION) MAINTAINER="$(MAINTAINER)" make deb
GOOS=linux GOARCH=amd64 DEBARCH=amd64 VERSION=$(VERSION) MAINTAINER="$(MAINTAINER)" make deb
GOOS=linux GOARCH=arm64 DEBARCH=arm64 VERSION=$(VERSION) MAINTAINER="$(MAINTAINER)" make deb
GOOS=linux GOARCH=arm GOARM=5 go build -ldflags="$(LDFLAGS)" -o dist/$(NAME).linux.arm_v5 $(MAIN_GO)
GOOS=linux GOARCH=arm GOARM=6 go build -ldflags="$(LDFLAGS)" -o dist/$(NAME).linux.arm_v6 $(MAIN_GO)
GOOS=linux GOARCH=arm GOARM=7 go build -ldflags="$(LDFLAGS)" -o dist/$(NAME).linux.arm_v7 $(MAIN_GO)
GOOS=linux GOARCH=arm_v5 GOARM=5 DEBARCH=armel VERSION=$(VERSION) MAINTAINER="$(MAINTAINER)" make deb
GOOS=linux GOARCH=arm_v7 GOARM=7 DEBARCH=armhf VERSION=$(VERSION) MAINTAINER="$(MAINTAINER)" make deb
GOOS=freebsd GOARCH=386 go build -ldflags="$(LDFLAGS)" -o dist/$(NAME).freebsd.386 $(MAIN_GO)
GOOS=freebsd GOARCH=amd64 go build -ldflags="$(LDFLAGS)" -o dist/$(NAME).freebsd.amd64 $(MAIN_GO)
GOOS=freebsd GOARCH=arm go build -ldflags="$(LDFLAGS)" -o dist/$(NAME).freebsd.arm $(MAIN_GO)
GOOS=openbsd GOARCH=386 go build -ldflags="$(LDFLAGS)" -o dist/$(NAME).openbsd.386 $(MAIN_GO)
GOOS=openbsd GOARCH=amd64 go build -ldflags="$(LDFLAGS)" -o dist/$(NAME).openbsd.amd64 $(MAIN_GO)
GOOS=openbsd GOARCH=arm go build -ldflags="$(LDFLAGS)" -o dist/$(NAME).openbsd.arm $(MAIN_GO)
GOOS=netbsd GOARCH=386 go build -ldflags="$(LDFLAGS)" -o dist/$(NAME).netbsd.386 $(MAIN_GO)
GOOS=netbsd GOARCH=amd64 go build -ldflags="$(LDFLAGS)" -o dist/$(NAME).netbsd.amd64 $(MAIN_GO)
GOOS=netbsd GOARCH=arm go build -ldflags="$(LDFLAGS)" -o dist/$(NAME).netbsd.arm $(MAIN_GO)
rm -rf dist/man/
install:
mkdir -p $(DESTDIR)$(PREFIX)/bin/
cp dist/$(NAME).$(GOOS).$(GOARCH) $(DESTDIR)$(PREFIX)/bin/$(NAME)
mkdir -p $(DESTDIR)$(PREFIX)/share/man/man1/
cp dist/man/man1/horizon.1.gz $(DESTDIR)$(PREFIX)/share/man/man1/horizon.1.gz
mkdir -p $(DESTDIR)$(PREFIX)/share/man/man5/
cp dist/man/man5/horizon-configs.5.gz $(DESTDIR)$(PREFIX)/share/man/man5/horizon-configs.5.gz
uninstall:
rm $(DESTDIR)$(PREFIX)/bin/$(NAME)
rm $(DESTDIR)$(PREFIX)/share/man/man1/horizon.1.gz
rm $(DESTDIR)$(PREFIX)/share/man/man5/horizon-configs.5.gz
deb:
mkdir -p $(DEB_BUILD_DIR)/$(NAME).$(GOOS).$(GOARCH)/DEBIAN/
cp -r build/deb/* $(DEB_BUILD_DIR)/$(NAME).$(GOOS).$(GOARCH)/
echo 'Package: $(NAME)' > $(DEB_BUILD_DIR)/$(NAME).$(GOOS).$(GOARCH)/DEBIAN/control
echo 'Provides: $(NAME)' >> $(DEB_BUILD_DIR)/$(NAME).$(GOOS).$(GOARCH)/DEBIAN/control
echo 'Version: $(VERSION)' >> $(DEB_BUILD_DIR)/$(NAME).$(GOOS).$(GOARCH)/DEBIAN/control
echo 'Architecture: $(DEBARCH)' >> $(DEB_BUILD_DIR)/$(NAME).$(GOOS).$(GOARCH)/DEBIAN/control
@if [ $(DEBARCH) == "amd64" ]; then \
echo 'Depends: libc6' >> $(DEB_BUILD_DIR)/$(NAME).$(GOOS).$(GOARCH)/DEBIAN/control; fi
echo 'Priority: optional' >> $(DEB_BUILD_DIR)/$(NAME).$(GOOS).$(GOARCH)/DEBIAN/control
echo 'Section: net' >> $(DEB_BUILD_DIR)/$(NAME).$(GOOS).$(GOARCH)/DEBIAN/control
echo 'Maintainer: $(MAINTAINER)' >> $(DEB_BUILD_DIR)/$(NAME).$(GOOS).$(GOARCH)/DEBIAN/control
echo 'Origin: https://github.com/lcomrade/horizon' >> $(DEB_BUILD_DIR)/$(NAME).$(GOOS).$(GOARCH)/DEBIAN/control
echo 'Description: Minimalist WEB-server for data transfer via HTTP' >> $(DEB_BUILD_DIR)/$(NAME).$(GOOS).$(GOARCH)/DEBIAN/control
echo ' Horizon is a simple program that performs the' >> $(DEB_BUILD_DIR)/$(NAME).$(GOOS).$(GOARCH)/DEBIAN/control
echo ' single function of transferring data using the HTTP protocol.' >> $(DEB_BUILD_DIR)/$(NAME).$(GOOS).$(GOARCH)/DEBIAN/control
echo ' Despite its simplicity, it supports TLS' >> $(DEB_BUILD_DIR)/$(NAME).$(GOOS).$(GOARCH)/DEBIAN/control
echo ' encryption and a custom HTTP page template.' >> $(DEB_BUILD_DIR)/$(NAME).$(GOOS).$(GOARCH)/DEBIAN/control
echo '$(NAME) ($(VERSION)) stable; urgency=medium' > $(DEB_BUILD_DIR)/$(NAME).$(GOOS).$(GOARCH)/usr/share/doc/$(NAME)/changelog
echo ' ' >> $(DEB_BUILD_DIR)/$(NAME).$(GOOS).$(GOARCH)/usr/share/doc/$(NAME)/changelog
echo ' * https://github.com/lcomrade/horizon/releases' >> $(DEB_BUILD_DIR)/$(NAME).$(GOOS).$(GOARCH)/usr/share/doc/$(NAME)/changelog
echo ' ' >> $(DEB_BUILD_DIR)/$(NAME).$(GOOS).$(GOARCH)/usr/share/doc/$(NAME)/changelog
echo ' -- $(MAINTAINER) $(shell date -R)' >> $(DEB_BUILD_DIR)/$(NAME).$(GOOS).$(GOARCH)/usr/share/doc/$(NAME)/changelog
gzip -9 --no-name --force $(DEB_BUILD_DIR)/$(NAME).$(GOOS).$(GOARCH)/usr/share/doc/$(NAME)/changelog
DESTDIR=$(DEB_BUILD_DIR)/$(NAME).$(GOOS).$(GOARCH) PREFIX=/usr make install
fakeroot dpkg-deb --build $(DEB_BUILD_DIR)/$(NAME).$(GOOS).$(GOARCH)
bash -c "cd $(DEB_BUILD_DIR)/$(NAME).$(GOOS).$(GOARCH)/ && md5deep -r usr > DEBIAN/md5sums"
mv $(DEB_BUILD_DIR)/*.deb dist/$(NAME)_$(VERSION)_$(DEBARCH).deb
rm -rf $(DEB_BUILD_DIR)/
clean:
rm -rf dist/
rm -rf internal/build/

40
README.md
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**Horizon** is a simple program that performs the single function of transferring data using the HTTP protocol.
Despite its simplicity, it supports TLS encryption and a custom HTTP page template.
The program comes as a single binary file and can easily be ported to a UNIX-like system that has a GO compiler.
## Features
- Easy to install
- Easy to configure
- Simple and understandable command line interface
- Man pages
- Supports arm and arm64
- The program is compiled in native code
- Free license: GNU GPL 3+
## Installation
### Debian/Ubuntu
1. Download the DEB package for your architecture from the [release](https://github.com/lcomrade/horizon/releases/latest) page
2. Install the downloaded DEB package
### Another GNU/Linux or FreeBSD/OpenBSD/NetBSD
1. Download a binary file for your OS and architecture from the [release](https://github.com/lcomrade/horizon/releases/latest) page
2. Make the program executable
3. Place program in `/usr/local/bin/` or in another directory provided for installing binary files
`NOTE:` If you need man pages you can find it [here](https://github.com/lcomrade/horizon/releases/latest/man.tar)
### Compiling from source code
1. Install `Go`, `GNU Make` and `gzip`
2. Download the source code from the [release](https://github.com/lcomrade/horizon/releases/latest) page
3. Unpack the source code
4. Run: `make`
5. Run as root: `make install`
`NOTE:` If you want to uninstall Horizon run as root: `make uninstall`
## Documentation
All documentation is supplied as man pages. If you installed Horizon from a DEB package or using `make install` the documentation is already installed.
Otherwise, you can download the latest documentation from [here](https://github.com/lcomrade/horizon/releases/latest/man.tar).
## Bugs and Suggestion
If you find a bug or have a suggestion, create an Issue [here](https://github.com/lcomrade/horizon/issues)

24
build/deb/usr/share/doc/horizon/copyright
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Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: horizon
Upstream-Contact:
Source: https://github.com/lcomrade/horizon
Files:
main.go
internal/*
Copyright: 2021 Leonid Maslakov
License: GPL-3.0-or-later
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
.
On Debian systems, the full text of the GPL v3 can be found in
/usr/share/common-licenses/GPL-3

191
cmd/horizon.go
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/*
Copyright 2021 Leonid Maslakov
License: GPL-3.0-or-later
This file is part of Horizon.
Horizon is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
Horizon is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Horizon. If not, see <https://www.gnu.org/licenses/>.
*/
package main
import (
"../internal/logger"
"../internal/settings"
"fmt"
"io/ioutil"
"net/http"
"os"
"os/user"
"path/filepath"
"syscall"
)
// ## WEB TEMPLATE ##
//Used when displaying the list of files in the directory
type TemplateType struct {
Path string
UpPath string
Files []FilesType
}
type FilesType struct {
Name string
Path string
Size int64
Mode os.FileMode
ModTime string
Uid string
Owner string
Gid string
Group string
}
//## HANDLER ##
func MainHandler(rw http.ResponseWriter, r *http.Request) {
path := r.URL.Path
//Checking the existence of a path
pathStat, err := os.Stat(*settings.ArgDir + path)
if err != nil {
if os.IsNotExist(err) {
logger.Info.Println(err)
http.Error(rw, err.Error(), 404)
return
} else {
logger.Warning.Println(err)
http.Error(rw, err.Error(), 400)
return
}
}
//Directory or file?
if pathStat.IsDir() == true {
//If the directory
//Getting a list of files in the directory
files, err := ioutil.ReadDir(*settings.ArgDir + path)
if err != nil {
logger.Warning.Println(err)
http.Error(rw, err.Error(), 400)
return
}
//Different arrays for directories and files
var answerDirs []FilesType
var answerFiles []FilesType
for _, file := range files {
//Getting information about one file
var uid = fmt.Sprint(file.Sys().(*syscall.Stat_t).Uid)
var owner, _ = user.LookupId(uid)
var gid = fmt.Sprint(file.Sys().(*syscall.Stat_t).Gid)
var group, _ = user.LookupId(gid)
var fileInfo = FilesType{
Name: file.Name(),
Path: filepath.Clean(path + "/" + file.Name()),
Size: file.Size(),
Mode: file.Mode(),
ModTime: file.ModTime().Format("2006 Jan 2 15:04"),
Uid: uid,
Owner: owner.Username,
Gid: gid,
Group: group.Username,
}
//Saving file information to an array
if file.IsDir() == true {
answerDirs = append(answerDirs, fileInfo)
} else {
answerFiles = append(answerFiles, fileInfo)
}
}
//In the answer, first the directories, then the files
answer := TemplateType{
Path: path,
UpPath: filepath.Clean(path + "/../"),
Files: append(answerDirs, answerFiles...),
}
//Filling the html page template
tmpl := settings.HtmlTemplate
err = tmpl.Execute(rw, answer)
if err != nil {
logger.Warning.Println(err)
http.Error(rw, err.Error(), 400)
return
}
} else {
//If the file
//Reading a file from the storage
file, err := ioutil.ReadFile(*settings.ArgDir + path)
if err != nil {
logger.Warning.Println(err)
http.Error(rw, err.Error(), 400)
return
}
//Sending file
rw.Write(file)
}
}
func main() {
//## WEB SERVER ##
//Handlers assignment
http.HandleFunc("/", MainHandler)
//Print information about the WEB server
logger.Info.Println("Server listen:", settings.Config.HttpServer.Listen)
logger.Info.Println("Server use TLS:", settings.Config.HttpServer.EnableTLS)
//Enable TLS?
//No TLS
if settings.Config.HttpServer.EnableTLS == false {
//Running a WEB server
err := http.ListenAndServe(settings.Config.HttpServer.Listen, nil)
if err != nil {
logger.Error.Fatal(err)
}
//Use TLS
} else {
//Check availability of CERT file
_, err := os.Stat(settings.Config.HttpServer.CertFile)
if err != nil {
if os.IsNotExist(err) {
logger.Error.Fatal("CERT file does not exist: " + settings.Config.HttpServer.CertFile)
}
}
//Check availability of KEY file
_, err = os.Stat(settings.Config.HttpServer.KeyFile)
if err != nil {
if os.IsNotExist(err) {
logger.Error.Fatal("KEY file does not exist: " + settings.Config.HttpServer.KeyFile)
}
}
//Running a WEB server with TLS
err = http.ListenAndServeTLS(settings.Config.HttpServer.Listen, settings.Config.HttpServer.CertFile, settings.Config.HttpServer.KeyFile, nil)
if err != nil {
logger.Error.Fatal(err)
}
}
}

31
docs/man/man1/horizon.1
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.TH "HORIZON" "1" "05.08.2021" "Horizon 0.1" "Horizon Manual"
.SH NAME
Horizon \- minimalist WEB-server for data transfer via HTTP
.PP
.SH DESCRIPTION
Horizon is a simple program that performs the single function of transferring data using the HTTP protocol. Despite its simplicity, it supports TLS encryption and a custom HTTP page template.
.PP
The program comes as a single binary file and can easily be ported to a UNIX-like system that has a GO compiler.
.PP
.SH SYNOPSIS
horizon [-config-dir] [-dir] [-version]
.PP
.SH OPTIONS
-config-dir
Specifies the custom directory with configuration files
.PP
-dir
Specifies the custom root directory of the WEB server. Default: "."
.PP
-version
Display version and exit
.PP
.SH FILES
The location of the configuration files is described in detail in the \fBFILES\fR section of the \fBhorizon-configs\fR(5) manual.
.PP
.SH BUGS
It was too time consuming to post information about every bug found here, but if you want to know about existing bugs or report a bug you can use this URL: \fBhttps://github.com/lcomrade/horizon/issues\fR
.PP
.SH SEE ALSO
\fBhorizon-configs\fR(5)
.PP

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docs/man/man5/horizon-configs.5
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.TH "HORIZON-CONFIGS" "5" "05.08.2021" "Horizon 0.1" "Horizon Configuration File Guide"
.SH NAME
Horizon \- configuration file guide
.PP
.SH FILES
Horizon uses the configuration files located in the \fB$HOME/.config/horizon/\fR and \fB/etc/horizon/\fR directories. List of configuration files:
.PP
\fBconfig.json\fR
Contains the basic settings. For example: the port on which the server will run.
.PP
\fBindex.tmpl\fR
Contains the template of the html page that will be displayed in the browser.
.PP
.SH config.json
Here is an example of a configuration file with all default values.
.PP
.nf
{
"HttpServer": {
"Listen": ":8080",
"EnableTLS": false,
"CertFile": "",
"KeyFile": ""
}
}
.fi
.PP
.SH index.tmpl
If you want to write your own HTML page template, use the GO documentation: \fBhttps://pkg.go.dev/html/template\fR . The example below shows the default template.
.PP
.nf
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>{{.Path}} - Horizon</title>
</head>
<body>
<h2>{{.Path}}</h2>
<p><a href={{.UpPath}}>Go top</a></p>
<table align='left' border=1 cellpadding=5>
<th align='left'>Name</th>
<th align='left'>Size (bit)</th>
<th align='left'>Mode</th>
<th align='left'>Modification time</th>
<th align='left'>Owner</th>
<th align='left'>Group</th>
{{range .Files}}
<tr>
<td><a href={{.Path}}>{{.Name}}</a></td>
<td>{{.Size}}</td>
<td>{{.Mode}}</td>
<td>{{.ModTime}}</td>
<td>{{.Owner}} ({{.Uid}})</td>
<td>{{.Group}} ({{.Gid}})</td>
</tr>
{{end}}
</table>
</body>
</html>
.fi
.PP
.SH SEE ALSO
\fBhorizon\fR(1)
.PP

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internal/logger/logger.go
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/*
Copyright 2021 Leonid Maslakov
This file is part of Horizon.
Horizon is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
Horizon is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Horizon. If not, see <https://www.gnu.org/licenses/>.
*/
package logger
import (
"log"
"os"
)
var Info = log.New(os.Stdout, "INFO\t", log.Ldate|log.Ltime)
var Warning = log.New(os.Stdout, "WARNING\t", log.Ldate|log.Ltime|log.Lshortfile)
var Error = log.New(os.Stderr, "ERROR\t", log.Ldate|log.Ltime|log.Lshortfile)

208
internal/settings/settings.go
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/*
Copyright 2021 Leonid Maslakov
License: GPL-3.0-or-later
This file is part of Horizon.
Horizon is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
Horizon is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Horizon. If not, see <https://www.gnu.org/licenses/>.
*/
package settings
import (
"../build"
"../logger"
"encoding/json"
"flag"
"fmt"
"html/template"
"os"
"path/filepath"
)
// ## CONFIG CONTENT ##
//Used to read a configuration file
type ConfigType struct {
HttpServer HttpServerType
}
type HttpServerType struct {
Listen string
EnableTLS bool
CertFile string
KeyFile string
}
//Default configuration
var ConfigDefault = ConfigType{
HttpServer: HttpServerType{
Listen: ":8080",
EnableTLS: false,
CertFile: "",
KeyFile: "",
},
}
//Get the path to the file. Can return an empty string.
func GetFilePath(fileName string) string {
if *ArgConfigDir != "" {
_, err := os.Stat(*ArgConfigDir + fileName)
if err == nil {
logger.Info.Println("Load file: " + *ArgConfigDir + fileName)
return *ArgConfigDir + fileName
}
logger.Info.Println(err)
}
//Checking the USER path for the location of the config file
for true {
//Getting HOME environment variable
variableHOME := os.Getenv(build.UserHomeEnvVar)
if variableHOME == "" {
logger.Warning.Println(build.UserHomeEnvVar + " environment variable is empty")
break
}
//Full path to file
userFullPath := filepath.Clean(variableHOME + "/" + build.UserConfigDir + "/" + fileName)
//Checking the existence of a file
_, err := os.Stat(userFullPath)
if err == nil {
return userFullPath
}
break
}
//Checking the SYSTEM path of the config file
sysFullPath := filepath.Clean(build.SysConfigDir + "/" + fileName)
_, err := os.Stat(sysFullPath)
if err == nil {
return sysFullPath
}
//If both paths are wrong it returns an empty string
return ""
}
//Read a configuration file
func ReadConfig(configFilePath string) ConfigType {
//Getting the default configuration
config := ConfigDefault
//If an empty string is received, return the default value
if configFilePath == "" {
return config
}
//Reading a configuration file
configFile, err := os.Open(configFilePath)
if err != nil {
logger.Warning.Println(err)
return config
}
//Decoding a configuration file
jsonParser := json.NewDecoder(configFile)
err = jsonParser.Decode(&config)
if err != nil {
logger.Warning.Println(err)
return config
}
return config
}
//Loads an HTML page template into RAM
func GetHtmlPageTemplate(indexHtmlFilePath string) *template.Template {
//Custom template found
if indexHtmlFilePath != "" {
//Reading the html page template
htmlPageTemplate, err := template.ParseFiles(indexHtmlFilePath)
if err != nil {
logger.Error.Fatal(err)
} else {
return htmlPageTemplate
}
}
//The custom template is missing
htmlPageTemplate := template.New("")
//Default template
templateDefault :=
`<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>{{.Path}} - Horizon</title>
</head>
<body>
<h2>{{.Path}}</h2>
<p><a href={{.UpPath}}>Go top</a></p>
<table align='left' border=1 cellpadding=5>
<th align='left'>Name</th>
<th align='left'>Size (bit)</th>
<th align='left'>Mode</th>
<th align='left'>Modification time</th>
<th align='left'>Owner</th>
<th align='left'>Group</th>
{{range .Files}}
<tr>
<td><a href={{.Path}}>{{.Name}}</a></td>
<td>{{.Size}}</td>
<td>{{.Mode}}</td>
<td>{{.ModTime}}</td>
<td>{{.Owner}} ({{.Uid}})</td>
<td>{{.Group}} ({{.Gid}})</td>
</tr>
{{end}}
</table>
</body>
</html>`
htmlPageTemplate.Parse(templateDefault)
return htmlPageTemplate
}
//Global vars
var ArgDir *string
var ArgConfigDir *string
var Config ConfigType
var HtmlTemplate *template.Template
func init() {
//Flags
ArgDir = flag.String("dir", ".", "Specifies the custom directory")
ArgConfigDir = flag.String("config-dir", "", "Specifies the custom directory with configuration files")
argVersion := flag.Bool("version", false, "Display version and exit")
flag.Parse()
//Displaying the version
if *argVersion == true {
fmt.Println("Horizon", build.Version)
os.Exit(0)
}
//Reading a configuration file
Config = ReadConfig(GetFilePath("config.json"))
//WEB
HtmlTemplate = GetHtmlPageTemplate(GetFilePath("index.tmpl"))
}

138
internal/settings/settings_test.go
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@ -0,0 +1,138 @@
package settings
import (
"../build"
"fmt"
"os"
"testing"
)
var testDirRoot = "/tmp/horizon_test"
//Delete the files used for testing
func MakeClean() {
err := os.RemoveAll(testDirRoot)
if err != nil {
panic(err)
}
}
//TEST: Search for configuration files
func TestGetFilePath(t *testing.T) {
MakeClean()
//Setting up paths
err := os.Setenv("HOME_HORIZON_TEST", testDirRoot)
if err != nil {
panic(err)
}
build.UserHomeEnvVar = "HOME_HORIZON_TEST"
build.UserConfigDir = ".config/app"
build.SysConfigDir = testDirRoot + "/etc/app/"
// ## SYSTEM configs location
err = os.MkdirAll(testDirRoot+"/etc/app/", 0777)
if err != nil {
panic(err)
}
_, err = os.Create(testDirRoot + "/etc/app/config.json")
if err != nil {
panic(err)
}
filePathOut := GetFilePath("config.json")
if filePathOut != testDirRoot+"/etc/app/config.json" {
fmt.Println(`--- INFO: GetFilePath("config.json") = ` + filePathOut)
t.Error(`SYSTEM configs location: GetFilePath("config.json") != ` + testDirRoot + `/etc/app/config.json`)
}
// ## USER configs location
err = os.MkdirAll(testDirRoot+"/.config/app/", 0777)
if err != nil {
panic(err)
}
_, err = os.Create(testDirRoot + "/.config/app/config.json")
if err != nil {
panic(err)
}
filePathOut = GetFilePath("config.json")
if filePathOut != testDirRoot+"/.config/app/config.json" {
fmt.Println(`--- INFO: GetFilePath("config.json") = ` + filePathOut)
t.Error(`USER configs location: GetFilePath("config.json") != ` + testDirRoot + `/.config/app/config.json`)
}
// ## NON-EXISTENT file
filePathOut = GetFilePath("noexist.file")
if filePathOut != "" {
fmt.Println(`--- INFO: GetFilePath("noexist.file") = ` + filePathOut)
t.Error(`NON-EXISTENT file: GetFilePath("noexist.file") != ""`)
MakeClean()
}
}
//TEST: Reading a configuration file
func TestReadConfig(t *testing.T) {
MakeClean()
// ## Blank line instead of the config file path
configOut := ReadConfig("")
if configOut.HttpServer.Listen != ":8080" {
fmt.Println(`--- INFO: config.HttpServer.Listen = ` + configOut.HttpServer.Listen)
t.Error(`NO CONFIG FILE: config.HttpServer.Listen != :8080`)
}
// ## Empty file
err := os.MkdirAll(testDirRoot, 0777)
if err != nil {
panic(err)
}
_, err = os.Create(testDirRoot + "/blank.json")
if err != nil {
panic(err)
}
configOut = ReadConfig(testDirRoot + "/blank.json")
if configOut.HttpServer.EnableTLS != false {
fmt.Printf(`--- INFO: config.HttpServer.EnableTLS = `)
fmt.Println(configOut.HttpServer.EnableTLS)
t.Error(`EMPTY CONFIG FILE: config.HttpServer.EnableTLS != false`)
}
// ## Custom config file
file, err := os.Create(testDirRoot + "/config.json")
if err != nil {
panic(err)
}
defer file.Close()
_, err = file.WriteString(`
{
"HttpServer": {
"Listen": ":5555",
"EnableTLS": true
}
}
`)
if err != nil {
panic(err)
}