commit 7eca66545fbe99dcc507d9a30a965c4681c26b22
Author: Agastya Chandrakant <me@hanabi.in>
Date: Thu, 17 Mar 2022 15:41:55 +0530
Initial commit.
Diffstat:
17 files changed, 1041 insertions(+), 0 deletions(-)
diff --git a/.gitignore b/.gitignore
@@ -0,0 +1,5 @@
+# binary
+amialive
+
+# log file
+logging.log
diff --git a/LICENSE b/LICENSE
@@ -0,0 +1,661 @@
+ GNU AFFERO GENERAL PUBLIC LICENSE
+ Version 3, 19 November 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
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+
+ Preamble
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+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+ 17. Interpretation of Sections 15 and 16.
+
+ If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+ END OF TERMS AND CONDITIONS
+
+ How to Apply These Terms to Your New Programs
+
+ If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+ To do so, attach the following notices to the program. It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+ <one line to give the program's name and a brief idea of what it does.>
+ Copyright (C) <year> <name of author>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU Affero 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 Affero General Public License for more details.
+
+ You should have received a copy of the GNU Affero General Public License
+ along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+ If your software can interact with users remotely through a computer
+network, you should also make sure that it provides a way for users to
+get its source. For example, if your program is a web application, its
+interface could display a "Source" link that leads users to an archive
+of the code. There are many ways you could offer source, and different
+solutions will be better for different programs; see section 13 for the
+specific requirements.
+
+ 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 AGPL, see
+<https://www.gnu.org/licenses/>.
diff --git a/README b/README
@@ -0,0 +1,53 @@
+ _ _ _
+ __ _ _ __ ___ (_) __ _| (_)_ _____
+ / _` | '_ ` _ \ | | / _` | | \ \ / / _ \
+| (_| | | | | | | | | | (_| | | |\ V / __/
+ \__,_|_| |_| |_| |_| \__,_|_|_| \_/ \___|
+===========================================
+
+Make it easy for people to check if you are alive or not.
+
+Requirements
+============
+0. sqlite3
+
+Installation
+============
+
+$ git clone https://git.hanabi.in/repos/am-i-alive-go.git
+$ cd am-i-alive-go
+$ sqlite3 am-i-alive.db -init init-db.sql
+$ make // or go build -o amialive src/main.go
+
+Configuration
+=============
+
+Update config/config.go to
+0. Port : Specify which port to run the server.
+1. Auth : Authentication password.
+2. Name : Name by which you are known.
+3. DB : Path to DB.
+4. Logfile : Path to logging GET requests.
+5. ShouldLog : If GET requests should be logged or not.
+
+Usage
+=====
+
+Try running the following command to see if the tool is working fine.
+
+$ curl -XPOST -H "Content-type: application/json" -d '{ "auth": "YOUR-PASSWORD" }' 'https://example.com/update'
+
+Run this command periodically so others know if you are alive or not.
+I have placed the command in my .zshrc.
+I use my terminal a lot, and therefore it updates my status regularly.
+
+People who want to know your status can run the following command to check on you.
+
+$ curl -XGET 'https://example.com/'
+
+If someone who wants to know about you is not user to cUrl, they can still open the URL to see the message.
+
+Sure, the message is not as pretty.
+But it should not take much time to set up a front-end to this.
+
+This is a very minimal tool under a free license. Tweak it to your liking.
diff --git a/am-i-alive.db b/am-i-alive.db
Binary files differ.
diff --git a/config/config.go b/config/config.go
@@ -0,0 +1,10 @@
+package config
+
+const (
+ Port = ":3000"
+ Auth = "43421613610ece95364eb358372e43bb49e75e7fc833a3ee91fcf9b1e2cce5134b93a474bd15e046d4e6c46c603ca1ec49dadc82af3c7c82db99521626aa72ea"
+ Name = "johndoe"
+ DB = "path/to/am-i-alive.db"
+ Logfile = "path/to/logging.log"
+ ShouldLog = true
+)
diff --git a/consts/consts.go b/consts/consts.go
@@ -0,0 +1,15 @@
+package consts
+
+const (
+ Offset = 164 * 10_000_000
+ Ms = 1_000
+ Sec2hr = 3_600
+ SQLITE3 = "sqlite3"
+)
+
+const (
+ T_4hr = 4 * Sec2hr
+ T_18hr = 18 * Sec2hr
+ T_60hr = 60 * Sec2hr
+ T_5d = 120 * Sec2hr
+)
diff --git a/go.mod b/go.mod
@@ -0,0 +1,5 @@
+module git.hanabi.in/dev/am-i-alive
+
+go 1.17
+
+require github.com/mattn/go-sqlite3 v1.14.12 // indirect
diff --git a/go.sum b/go.sum
@@ -0,0 +1,2 @@
+github.com/mattn/go-sqlite3 v1.14.12 h1:TJ1bhYJPV44phC+IMu1u2K/i5RriLTPe+yc68XDJ1Z0=
+github.com/mattn/go-sqlite3 v1.14.12/go.mod h1:NyWgC/yNuGj7Q9rpYnZvas74GogHl5/Z4A/KQRfk6bU=
diff --git a/handlers/get-home-page-utils.go b/handlers/get-home-page-utils.go
@@ -0,0 +1,92 @@
+package handlers
+
+import (
+ "database/sql"
+ "encoding/json"
+ "fmt"
+ "net/http"
+ "time"
+
+ "git.hanabi.in/dev/am-i-alive/config"
+ "git.hanabi.in/dev/am-i-alive/consts"
+ JsonStructs "git.hanabi.in/dev/am-i-alive/json-structs"
+)
+
+func getRespForHomePage(r *http.Request) (header int, resp []byte) {
+ if r.Method != http.MethodGet {
+ header = http.StatusMethodNotAllowed
+ err_msg := "Method not allowed."
+ resp, _ = json.Marshal(JsonStructs.ErrJson{Err: err_msg})
+ } else {
+ if msg, lastseen, unix, err := fetchUpdatedAtMsg(); err != nil {
+ header = http.StatusInternalServerError
+ resp, _ = json.Marshal(JsonStructs.ErrJson{Err: err.Error()})
+ } else {
+ header = http.StatusOK
+ if lastseen == "" {
+ resp, _ = json.Marshal(JsonStructs.NotStartedJson{Message: msg})
+ } else {
+ resp, _ = json.Marshal(JsonStructs.ResJson{Message: msg, Lastseen: lastseen, Unix: unix})
+ }
+ }
+ }
+ return header, resp
+}
+
+func fetchUpdatedAtMsg() (msg string, lastseen string, unix int64, err error) {
+ db, err := open_db()
+ defer db.Close()
+
+ if err == nil {
+ if updated_at, err := queryUpdatedAt(db); err == nil {
+ if updated_at == 0 {
+ msg = fmt.Sprintf("%s has not started using this tool yet.", config.Name)
+ } else {
+ lastseen, unix = getLastSeen(updated_at)
+ msg = getMsgBasedOn(updated_at)
+ }
+ }
+ }
+ return msg, lastseen, unix, err
+}
+
+// Get seconds between RIGHT NOW, and when was the last update.
+func getDiff(updated_at int64) (diff int64) {
+ now := time.Now().Unix() - consts.Offset // since updated_at is decreased by offset.
+ diff = now - updated_at
+ return diff
+}
+
+// Get the last updated_at (UNIX timestamp - offset) for the userid from DB.
+func queryUpdatedAt(db *sql.DB) (res int64, err error) {
+ query_str := "SELECT updatedat FROM alive WHERE id=0"
+ row := db.QueryRow(query_str)
+ err = row.Scan(&res)
+ return res, err
+}
+
+// Get lastseen string and UNIX (milli) timestamp based on last updated_at (UNIX timestamp - offset).
+func getLastSeen(updated_at int64) (lastseen string, unix int64) {
+ secs := (updated_at + consts.Offset)
+ unix = secs * consts.Ms
+ datetime := time.Unix(secs, 0).UTC().Format(time.RFC1123)
+ lastseen = fmt.Sprintf("%s was last active around %s+0000 (Coordinated Universal Time).", config.Name, datetime)
+ return lastseen, unix
+}
+
+// depending on diff in seconds from last updated and now, get a formatted message.
+func getMsgBasedOn(updated_at int64) (msg string) {
+ diff := getDiff(updated_at)
+ if diff >= 0 && diff <= consts.T_4hr {
+ msg = fmt.Sprintf("%s is most certainly alive.", config.Name)
+ } else if diff > consts.T_4hr && diff <= consts.T_18hr {
+ msg = fmt.Sprintf("%s is most certainly AFK.", config.Name)
+ } else if diff > consts.T_18hr && diff <= consts.T_60hr {
+ msg = fmt.Sprintf("%s has been away for quite some time now. You might want to check on him.", config.Name)
+ } else if diff > consts.T_60hr && diff <= consts.T_5d {
+ msg = fmt.Sprintf("%s has been away for rather too long. If %s didn't tell you he will be gone for so long, *please* check on him!", config.Name, config.Name)
+ } else {
+ msg = fmt.Sprintf("%s is most certainly dead.", config.Name)
+ }
+ return msg
+}
diff --git a/handlers/get-home-page.go b/handlers/get-home-page.go
@@ -0,0 +1,13 @@
+package handlers
+
+import (
+ "net/http"
+)
+
+func GetHomePage(rw http.ResponseWriter, r *http.Request) {
+ go logRequest(r)
+ rw.Header().Set("Content-Type", "application/json")
+ header, resp := getRespForHomePage(r)
+ rw.WriteHeader(header)
+ rw.Write(resp)
+}
diff --git a/handlers/handler-utils.go b/handlers/handler-utils.go
@@ -0,0 +1,33 @@
+package handlers
+
+import (
+ "database/sql"
+ "fmt"
+ "log"
+ "net/http"
+ "os"
+ "time"
+
+ "git.hanabi.in/dev/am-i-alive/config"
+ "git.hanabi.in/dev/am-i-alive/consts"
+ _ "github.com/mattn/go-sqlite3"
+)
+
+func open_db() (db *sql.DB, err error) {
+ db, err = sql.Open(consts.SQLITE3, config.DB)
+ return db, err
+}
+
+func logRequest(r *http.Request) {
+ if config.ShouldLog {
+ file, err := os.OpenFile(config.Logfile, os.O_WRONLY|os.O_APPEND|os.O_CREATE, 0600)
+ defer file.Close()
+ if err != nil {
+ log.Fatalf("Error %v", err)
+ }
+ R := fmt.Sprintf("%s %#v -- %#v\n\n", time.Now(), r, r.URL)
+ if _, err = file.Write([]byte(R)); err != nil {
+ log.Fatalf("Error %v", err)
+ }
+ }
+}
diff --git a/handlers/update-last-active-utils.go b/handlers/update-last-active-utils.go
@@ -0,0 +1,80 @@
+package handlers
+
+import (
+ "crypto/sha512"
+ "database/sql"
+ "encoding/hex"
+ "encoding/json"
+ "fmt"
+ "io"
+ "net/http"
+ "time"
+
+ "git.hanabi.in/dev/am-i-alive/config"
+ "git.hanabi.in/dev/am-i-alive/consts"
+ JsonStructs "git.hanabi.in/dev/am-i-alive/json-structs"
+)
+
+func getRespForUpdateLastActive(r *http.Request) (header int, resp []byte) {
+ is_db_updated := false
+ if r.Method != http.MethodPost { // if method was not POST
+ header = http.StatusMethodNotAllowed
+ err_msg := "Method not allowed."
+ resp, _ = json.Marshal(JsonStructs.ErrJson{Err: err_msg})
+ } else {
+ if err, res := isAuthFailed(r.Body); res == true { // if auth failed.
+ header = http.StatusUnauthorized
+ err_msg := err.Error()
+ resp, _ = json.Marshal(JsonStructs.AuthFailErrJson{Err: err_msg, Updated: is_db_updated})
+ } else {
+ if err := tryUpdatingDb(); err != nil { // if error occurred while updating DB.
+ header = http.StatusInternalServerError
+ err_msg := err.Error()
+ resp, _ = json.Marshal(JsonStructs.AuthFailErrJson{Err: err_msg, Updated: is_db_updated})
+ } else {
+ is_db_updated = true
+ header = http.StatusOK
+ resp, _ = json.Marshal(JsonStructs.AuthSuccessJson{Updated: is_db_updated})
+ }
+ }
+ }
+ return header, resp
+}
+
+func tryUpdatingDb() (err error) {
+ db, err := open_db()
+ defer db.Close()
+
+ if err == nil {
+ err = queryUpdateLastSeen(db)
+ }
+ return err
+}
+
+// Update DB to store updated at as (UNIX timestamp - offset)
+func queryUpdateLastSeen(db *sql.DB) (err error) {
+ now := time.Now().Unix() - consts.Offset
+ query_str := "UPDATE alive SET updatedat = ? WHERE id = 0"
+ stmt, err := db.Prepare(query_str)
+ _, err = stmt.Exec(now)
+ stmt.Close()
+ return err
+}
+
+// Check if sha512 of the auth sent in the request body is same as in the config.
+func isAuthFailed(body io.ReadCloser) (err error, isFailed bool) {
+ isFailed = true
+ decoder := json.NewDecoder(body)
+ var auth JsonStructs.AuthJson
+ if err = decoder.Decode(&auth); err == nil {
+ s := sha512.New()
+ s.Write([]byte(auth.Auth))
+ received_auth_hash := fmt.Sprint(hex.EncodeToString(s.Sum(nil)))
+ if config.Auth != received_auth_hash {
+ err = fmt.Errorf("Incorrect credentials.")
+ } else {
+ isFailed = false
+ }
+ }
+ return err, isFailed
+}
diff --git a/handlers/update-last-active.go b/handlers/update-last-active.go
@@ -0,0 +1,12 @@
+package handlers
+
+import (
+ "net/http"
+)
+
+func UpdateLastActive(rw http.ResponseWriter, r *http.Request) {
+ rw.Header().Set("Content-Type", "application/json")
+ header, resp := getRespForUpdateLastActive(r)
+ rw.WriteHeader(header)
+ rw.Write(resp)
+}
diff --git a/init-db.sql b/init-db.sql
@@ -0,0 +1,9 @@
+-- CreateTable
+CREATE TABLE "alive" (
+ "id" INTEGER NOT NULL PRIMARY KEY,
+ "updatedat" INTEGER NOT NULL
+);
+
+-- FirstEntry
+INSERT INTO "alive" (id, updatedat) VALUES (0, 0);
+
diff --git a/json-structs/structs.go b/json-structs/structs.go
@@ -0,0 +1,28 @@
+package JsonStructs
+
+type ErrJson struct {
+ Err string `json:"err"`
+}
+
+type ResJson struct {
+ Message string `json:"message"`
+ Lastseen string `json:"lastseen"`
+ Unix int64 `json:"unix"`
+}
+
+type NotStartedJson struct {
+ Message string `json:"message"`
+}
+
+type AuthJson struct {
+ Auth string `json:"auth"`
+}
+
+type AuthFailErrJson struct {
+ Err string `json:"err"`
+ Updated bool `json:"updated"`
+}
+
+type AuthSuccessJson struct {
+ Updated bool `json:"updated"`
+}
diff --git a/makefile b/makefile
@@ -0,0 +1,6 @@
+build:
+ go build -o amialive src/main.go
+dev:
+ make build && ./amialive
+clean:
+ rm -f ./amialive
diff --git a/src/main.go b/src/main.go
@@ -0,0 +1,17 @@
+package main
+
+import (
+ "fmt"
+ "log"
+ "net/http"
+
+ "git.hanabi.in/dev/am-i-alive/config"
+ "git.hanabi.in/dev/am-i-alive/handlers"
+)
+
+func main() {
+ http.HandleFunc("/", handlers.GetHomePage)
+ http.HandleFunc("/update", handlers.UpdateLastActive)
+ fmt.Printf("Starting server on port %s.\n", config.Port)
+ log.Fatal(http.ListenAndServe(config.Port, nil))
+}
